Artykuły w czasopismach: „MICROSTRIP LIVES”

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Sai Geethika, Sunkavalli, Etyala Kethan, Pilli Rishika i Machunoori Mounica. "Design of Microstrip Rectangular 8x1 Patch Array Antenna for WiMAX Application". E3S Web of Conferences 391 (2023): 01100. http://dx.doi.org/10.1051/e3sconf/202339101100.

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In our daily lives, wireless communications are becoming increasingly significant. The antennas needed for these applications should be light weight, conveniently mountable, and have a broad bandwidth due to the rise in data rates and a tendency of tiny electronic devices for wireless digital applications. These requirements can be met by Microstrip Array Antennas. In this paper, the rectangular microstrip patch array antenna of frequency 2.5-3.5Ghz for WIMAX applications is designed in computer stimulation tool (CST). The antenna is fabricated using FR-4 Substrate material. The designed antenna’s performance is analysed in terms of voltage VSWR, s-parameters, radiation pattern, gain, directivity.

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Christina, G. "A Review on Novel Microstrip Patch Antenna Designs and Feeding Techniques". IRO Journal on Sustainable Wireless Systems 4, nr 2 (25.07.2022): 110–20. http://dx.doi.org/10.36548/jsws.2022.2.005.

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Mobile technology is rapidly advancing nowadays due to its high impact in our day-to-day lives. As a result, there is an increasing need to study the advancement of antenna systems, which are regarded as fundamental equipment for wireless connectivity. Compared to the traditional large size antennas, microstrip patch antennas are now widely used in different applications such as smart phones, military, smart wearable devices etc. due to its unique characteristics such as lighter weight, reconfigurable structure, foldability, ease of fabrication, multi-frequency operations, and compactness. This research study presents a review on various microstrip patch antenna designs and the different antenna feed mechanisms available for 5G applications.

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Chen, Ja-Hao, Chen-Yang Cheng, Chuan-Min Chien, Chumpol Yuangyai, Ting-Hua Chen i Shuo-Tsung Chen. "Multiple Performance Optimization for Microstrip Patch Antenna Improvement". Sensors 23, nr 9 (26.04.2023): 4278. http://dx.doi.org/10.3390/s23094278.

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As the Internet of Things (IOT) becomes more widely used in our everyday lives, an increasing number of wireless communication devices are required, meaning that an increasing number of signals are transmitted and received through antennas. Thus, the performance of antennas plays an important role in IOT applications, and increasing the efficiency of antenna design has become a crucial topic. Antenna designers have often optimized antennas by using an EM simulation tool. Although this method is feasible, a great deal of time is often spent on designing the antenna. To improve the efficiency of antenna optimization, this paper proposes a design of experiments (DOE) method for antenna optimization. The antenna length and area in each direction were the experimental parameters, and the response variables were antenna gain and return loss. Response surface methodology was used to obtain optimal parameters for the layout of the antenna. Finally, we utilized antenna simulation software to verify the optimal parameters for antenna optimization, showing how the DOE method can increase the efficiency of antenna optimization. The antenna optimized by DOE was implemented, and its measured results show that the antenna gain and return loss were 2.65 dBi and 11.2 dB, respectively.

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Singh, Arun Kumar, Arun Kumar, Samarendra Nath Sur, Rabindranath Bera i Bansibadan Maji. "Design and implementation of microstrip array antenna for intelligent transportation systems application". Frequenz 75, nr 7-8 (1.06.2021): 267–73. http://dx.doi.org/10.1515/freq-2020-0162.

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Abstract This article proposes a design and implementation of array Microstrip Patch antenna of configuration 2 × 2 at an operating frequency of 3.5 GHz. The proposed design takes a dimension of 80 mm × 92 mm × 1.6 mm with four radiating elements arranged in rectangular form with an optimized separation between the patches. All the radiating elements were connected through a corporate series network with an inset feed to have better impedance matching. The model gives an efficiency of 90.99% with a bandwidth of 510 MHz and with fractal configuration, the bandwidth further enhances to 1.12 GHz. The maximum gain measured was found as 11.01 dBi at θ = 10° and ɸ = 360° and 10.45 dBi with fractal configuration. The designed antenna is proposed to be used in RADAR which will be used in the intelligent transportation system for the detection of nearby (short-range) vehicles in the blind zone. This kind of Radar also finds its application in collision avoidance and activating airbags/break boosting and thus helping mankind by saving lives. The article gives an idea of the use of an array antenna in intelligent transportation system for better gain and efficient results.

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Ghazali, Abu Nasar, Mohd Sazid i Srikanta Pal. "A dual notched band UWB-BPF based on microstrip-to-short circuited CPW transition". International Journal of Microwave and Wireless Technologies 10, nr 7 (21.05.2018): 794–800. http://dx.doi.org/10.1017/s1759078718000594.

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AbstractThis paper proposes a dual notched band ultra-wideband (UWB) bandpass filter (BPF) based on hybrid transition of microstrip and coplanar waveguide (CPW). The CPW in ground plane houses a stepped impedance resonator shorted at ends, and is designed to place its resonant modes within the UWB passband. The microstrips on the top plane are placed some distance apart in a back-to-back manner. The transition of microstrip on top and shorted CPW in the ground is coupled through the dielectric in a broadside manner. The optimized design of the transition develops the basic UWB spectrum with good return/insertion loss and extended stopband. Later, defected ground structure, embedded in CPW, and split ring resonators, coupled to feeding lines are utilized to develop dual sharp passband notches. The simulated data are verified against the experimentally developed prototype. The proposed dual notched UWB-BPF structure measures only 14.6 × 7.3 mm2, thereby justifying its compactness.

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La, Dong-Sheng, Xin Guan, Shuai-Ming Chen, Yu-Ying Li i Jing-Wei Guo. "Wideband Band-Pass Filter Design Using Coupled Line Cross-Shaped Resonator". Electronics 9, nr 12 (17.12.2020): 2173. http://dx.doi.org/10.3390/electronics9122173.

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In this paper, a wideband bandpass filter with a coupled line cross-shaped resonator (CLCSR) is proposed. The proposed bandpass filter is composed of two open-end parallel coupled lines, one short-end parallel coupled line, one branch microstrip line, and the parallel coupled line feed structure. With the use of the even and odd mode approach, the transmission zeros and transmission poles of the proposed bandpass filter are analyzed. The coupling coefficient of the parallel coupled line feed structure is big, so the distance between the parallel coupled line is too small to be processed. A three microstirp lines coupled structure is used to realize strong coupling and cross coupling. This structure also can reduce the return loss in passband and increase the out-of-band rejection. The transmission zeros can be adjusted easily by varying the lengths of the open-end parallel coupled line or the short-end parallel coupled line. The proposed bandpass filter is fabricated and measured. The simulated results agree well with the measured ones, which shows that the design method is valid.

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Lin, Shu-Dong, Shi Pu, Chen Wang i Hai-Yang Ren. "Compact Design of Annular-Microstrip-Fed mmW Antenna Arrays". Sensors 21, nr 11 (26.05.2021): 3695. http://dx.doi.org/10.3390/s21113695.

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In this paper, a series of four novel microstrip antenna array designs based on different annular-microstrip feeding lines at 60-GHz millimeter wave (mmW) band are proposed, aiming at the potential usage of the mmW coverage antenna with multi-directional property. As the feeding network, the annular contour microstrip lines are employed to connect the patch units so as to form a more compact array. Our first design is to use an outer contour annular microstrip line to connect four-direction linear arrays composed of 1 × 3 rectangular patches, thus the gain of 8.4 dBi and bandwidth of over 300 MHz are obtained. Our second design is to apply the two-direction pitchfork-shaped array each made up of two same linear arrays as the above, therefore the gain of 9.65 dBi and bandwidth of around 250 MHz are achieved. Our third design is to employ dual (inner and outer contour) annular-microstrip feeding lines to interconnect the above four-direction linear arrays, while our fourth design is to bring bridged annular-microstrip feeding lines, both of which can realize the goal of multi-directional radiation characteristic and higher gain of over 10 dBi.

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Yang, Hong, Zhe Yu Chen i Kun Yi Lv. "Analysis of Dispersion Characteristic of Microstrip Lines on Ferrite and Silicon Structures with Spectral-Domain Method". Applied Mechanics and Materials 130-134 (październik 2011): 1244–49. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.1244.

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In this paper, we presented two types of ferrite&si double layer substrate microstrip lines structures and derived waveguide admittance through coordinate rotation and Fourier transformation of Maxwell equations, then we analyzed its characteristics. We performed dispersion characteristic calculations on microstrip lines, discussed influence of various parameters of microstrip lines on dispersion characteristics and compared their characteristics, then we discovered parameters influence on one specific type of structure dispersion is minimum, especially on technique dimension of dielectric. It can make applications for IC fabrication.

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Knyazev N. S., Malkin A. I. i Chechetkin V. A. "Losses measurement method for transmission lines at mmWave". Technical Physics Letters 48, nr 3 (2022): 34. http://dx.doi.org/10.21883/tpl.2022.03.52880.18981.

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An experimental method was developed to determine losses in microstrip and coplanar transmission lines for devices operating in the frequency range of 77-81 GHz. The parameters of the scattering matrices are obtained using a vector network analyzer and frequency upconverters. The calculation of losses in waveguide-coplanar and coplanar-microstrip adapters is made. Keywords: losses, attenuation, microstrip line, coplanar waveguide, electrodynamic parameters.

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Vo, Hung T., i Frank G. Shi. "New Analytical Model for the Dielectric Loss of Microstrip Lines on Multilayer Dielectric Substrates: Effect of Conductor-Dielectric Interphase". Journal of Microelectronics and Electronic Packaging 3, nr 2 (1.04.2006): 61–66. http://dx.doi.org/10.4071/1551-4897-3.2.61.

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The existing CAD formulae for dielectric loss of microstrip lines on substrate are complicated and inaccurate at high frequencies. In particular, no closed-form expression has been obtained for the dielectric loss of microstrip lines on multi-layer dielectric substrate by including the conductor-substrate interphase effect, although attempts have been made to study the finite thickness effect of the conductor and dielectric substrate. The present work represents the first attempt to obtain a closed-form CAD formula for the dielectric loss of microstrip lines on dielectric substrates by considering the effect of conductor-substrate interphase. Our simple and accurate model systematically considers the effect of the interphase between the microstrip line and substrate by using a quasi-TEM approach and is shown to be supported by the available experimental data.

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Li, Wei Ping, Hui Luo i Xui Hui Guan. "The Modeling and Simulation of Mirostrip Bandpass Filter Using ADS". Advanced Materials Research 421 (grudzień 2011): 192–95. http://dx.doi.org/10.4028/www.scientific.net/amr.421.192.

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Microstrip filter is used widely in wireless communication area, especially in WLAN. Compared to the conventional manufacturing techniques using lumped element, we can get extremely better characters in high frequency wave band using microstrip lines. ADS2008 (Agilent Advanced Design System 2008) is an excellent software platform for high frequency and high speed EDA manufacturing. In this letter, the modeling of microstrip filter which works at appointed frequency is got by transforming the lumped elements to microstrip elements. Finally, the microstrip filter simulated, optimized by ADS2008.

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Sun, Hai. "Calculation of Transmission Characteristics of Shielded Microstrip Lines Filled with Anisotropic Left-Handed and Right-Handed Materials". Journal of Nanoelectronics and Optoelectronics 16, nr 10 (1.10.2021): 1610–17. http://dx.doi.org/10.1166/jno.2021.3122.

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In this paper, the edge-based finite element formula for calculating the transmission characteristics of shielded microstrip lines filled with anisotropic materials with magnetic field as working variable is derived in detail. The filling materials include anisotropic left-handed materials and anisotropic right-handed materials, and the transmission characteristics include dominant mode cutoff wavelength and electric field structure. We mainly take Rectangular-shaped, V-shaped and Trapezoidal-shaped shielded microstrip lines as examples to calculate the transmission characteristics. The formulas and calculation examples derived in this paper have strong guiding significance for the application of anisotropic left-handed and right-handed materials in inhomogeneous transmission lines, which will further expand the use of shielded microstrip lines in optical devices such as electro-optic waveguide modulators.

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Sonasang, Somchat, i Ravee Phromloungsri. "The measurement of water level based on parallel-coupled lines with capacitance compensation". SNRU Journal of Science and Technology 14, nr 2 (1.05.2022): 245039. http://dx.doi.org/10.55674/snrujst.v14i2.245039.

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This paper aimed to measure the water level using parallel-coupled microstrip lines with capacitor compensation. The design and implementation were parallel coupled microstrip lines with capacitor compensation to measure the water level. The technique of parallel-coupled microstrip lines had a coupling coefficient of – 10 dB. The center frequency was 200 MHz, and the compensated capacitor was positioned at ports 3 and 4. The water level was adjusted from 0 to 20 cm in the experiment. The frequency response of the coupling factor was measured from 300 kHz to 2 GHz. The coupling coefficient at 200 MHz was – 11.45 dB at 0 cm water level, where a shift of frequency decreased continuously. This technique was simple to follow, as the sensor was small and inexpensive.

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Roy, Avisankar, Sunandan Bhunia, Debasree Chanda Sarkar, Partha Pratim Sarkar i Santosh Kumar Chowdhury. "Compact multi frequency strip loaded microstrip patch antenna with spur-lines". International Journal of Microwave and Wireless Technologies 9, nr 5 (9.11.2016): 1111–21. http://dx.doi.org/10.1017/s1759078716001136.

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In this paper a new design of compact single layered triangular slotted microstrip patch antenna with spur lines and strip loading is proposed. It has been experimentally investigated that strip loading causes more size reduction where spur lines and triangular slot introduces multi frequency operation of microstrip patch antenna. The size reduction has been found to be 87% for the proposed antenna. In this article the effect of strip loading and spur lines over compactness are individually analyzed.

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Ding, Daye, Ruozhou Li, Jing Yan, Jiang Liu, Yuming Fang i Ying Yu. "Influence of Microcracks on Silver/Polydimethylsiloxane-Based Flexible Microstrip Transmission Lines". Applied Sciences 11, nr 1 (22.12.2020): 5. http://dx.doi.org/10.3390/app11010005.

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Microcrack is commonly seen as a defect in materials that affects the performance of flexible radio frequency (RF) devices. Here, we investigate the influence of microcracks on the RF characteristics of flexible microstrip by stretching flexible microstrip that is based on polydimethylsiloxane (PDMS) substrate and an Ag microparticles/PDMS (AgMP/PDMS) composite conductor. The RF characteristics of the microstrip were monitored with a variety of tensile displacements. An equivalent circuit model of the microstrip with microcracks was proposed to reveal the mechanisms. The fitting results matched the actual measurement well. In addition, the morphology of the microcracks was characterized by SEM and the direct-current (DC) resistance was monitored. The results show that the changes in equivalent circuit element parameters (R, L, C) are due to the change in the conductive pathways, which affect the transmission and reflection of the RF signals.

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Gao, Bo, Ling Tong i Xun Gong. "The effects of finite metallisation thickness and conductivity in microstrip lines". COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 32, nr 2 (1.03.2013): 495–503. http://dx.doi.org/10.1108/03321641311296891.

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PurposeThe purpose of this paper is to study and discuss the effects of the finite metallisation thickness and conductivity on the properties of microstrip lines.Design/methodology/approachEffective dielectric constant and attenuation constant of microstrip lines with finite metallization thickness and finite conductivity are analyzed by the method of lines. The experimental results are obtained by using Vector Network Analyzer and the 3680 V Universal Test Fixture of Anritsu.FindingsThe strip thickness has a great impact on the attenuation constant of the microstrip lines. The effects can be divided into three parts by the relationship between strip thickness (t) and skindepth (δ). When t<δ, the attenuation constant will decrease rapidly as the strip thickness increase. When δ < t<2δ, the attenuation constant still decrease rapidly as the strip thickness increase, but the slope of the curve will be smaller. When 2δ < t, the effects of the strip thickness will become insignificant and the attenuation constant still decrease slowly as the strip thickness increase.Originality/valueThis paper presents some useful principles about the effects of the finite metallization thickness and finite conductivity in microstrip lines. The reasons for these effects are discussed by analyzing the longitudinal electric field distribution in the strip. Finally, some experimental results are given to verify these principles.

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Wang, Shouxu, Xiaolan Xu, Guoyun Zhou, Yuanming Chen, Wei He, Wenjun Yang, Xinhong Su i Yongshuan Hu. "Effects of microstrip line fabrication and design on high-speed signal integrity transmission of PCB manufacturing process". Circuit World 44, nr 2 (8.05.2018): 53–59. http://dx.doi.org/10.1108/cw-11-2017-0064.

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Purpose As a common transmission line, the microstrip line plays an important role in high-speed circuits. The purpose of this paper was to investigate the effects of the circuit design of microstrip lines on the signal integrity (SI). In addition, the influence of the type and thickness of the solder resist ink on SI was analyzed to provide guidance for the related producing process design of printed circuit boards (PCBs). Design/methodology/approach Microstrip line properties consisting of shape, line-width/line-space ratio, reference layer design and as-covered solder resist ink were designed to measure the insertion loss (S21) in high-speed PCB. Findings The study showed that the insertion loss (S21) of straight, meander, snake-shaped and wavy microstrip lines was approximately consistent. A microstrip line with width/space ratio less than 0.96 is necessary, as the differential line closing produces a mutual interference. Reference layer including the discontinuous area should be repaired by adjusting the microstrip line parameters. With regard to the solder resist ink, the insertion loss of novel solder resist ink decreased by 0.163 dB/in at 12.9 GHz and 0.164 dB/in at 14 GHz, compared with traditional solder resist ink. Accordingly, the insertion loss effectively improved at a lower thickness of solder resist. Originality/value This paper demonstrated that the common designing factors of line shape, line/space ratio, reference layer and solder resist influence microstrip line SI in the significant reference of designer-making PCB layout.

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Bayjja, M., M. Moubadir, G. Alsharahi, M. Aghoutane i N. Amar Touhami. "Modeling a Planar Coupled Microstrip Lines using various Wavelets and Method of Moments". Advanced Electromagnetics 8, nr 1 (20.03.2019): 51–58. http://dx.doi.org/10.7716/aem.v8i1.771.

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In this paper, we apply a several wavelets basis functions to the method of moments to modeling the parallel-coupled microstrip lines. The ﬁrst set of equations is for the shielded microstrip line solved with moment’s method and wavelets. The Green’s function is obtained from the theory of images. The second set are for the parallel-coupled microstrip lines operating in the TEM mode or when the analysis can be based on quasi-static approximation, the properties of coupled lines can be determined from the self- and mutual inductances and capacitances for the lines. To demonstrate the effectiveness and accuracy of the proposed technique, numerical results of even- and odd-mode characteristic impedances, coupling coefficient, percentage sparsity achieved in the impedance matrix, the CPU Time to reverse impedance matrix, and error relative for Daubechies, Coiflets, Biorthogonal and Symlets wavelets are presented. Numerical results are in good agreement with those in previous publications.

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Lakhlef, Ahcene, Arezki Benfdila i Lounas Belhimer. "Capacitance study of integrated circuits matrix interconnects". Indonesian Journal of Electrical Engineering and Computer Science 22, nr 2 (1.05.2021): 1156. http://dx.doi.org/10.11591/ijeecs.v22.i2.pp1156-1164.

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Propagation delays and couplings between nearby lines affect the circuit performances (speed, power consumption) and operations. Propagation delays in longer lines can become critical compared to the clock frequency and can induce unwanted signals in neighboring lines ("crosstalk" phenomenon). Induced line capacitances can induce parasitic signals. Hence characterizing of these capacitances is of paramount importance. The present work deals with the analysis of capacitance of a multilayer conductor interconnect aiming for their possible exact extraction. We used three topologies of a microstrip conductor interconnects and identified the potential distributor and then computed the capacitance and inductance matrix using a finite element method. The first analysis dealt with parallel microstrip conductors and the second with two levels (plan) of a microstrip conductors the results are compared to those obtained by other methods and found quite encouraging.

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Tang, Xiao-Lan, Emmanuel Pistono, Philippe Ferrari i Jean-Michel Fournier. "Enhanced performance of a 60-GHz power amplifier by using slow-wave transmission lines in 40 nm CMOS technology". International Journal of Microwave and Wireless Technologies 4, nr 1 (11.10.2011): 93–100. http://dx.doi.org/10.1017/s1759078711000900.

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This paper shows the contribution of slow-wave coplanar waveguides on the performance of power amplifiers operating at millimeter-wave frequencies in CMOS-integrated technologies. These transmission lines present a quality factor Q two to three times higher than that of the conventional microstrip lines at the same characteristic impedance. To demonstrate the contribution of the slow-wave transmission lines on integrated millimeter-wave amplifiers performance, two Class-A single-stage power amplifiers (PA) operating at 60 GHz were designed in standard 40 nm CMOS technology. One of the power amplifiers incorporates only the microstrip lines, whereas slow-wave coplanar transmission lines are considered in the other one. Both amplifiers are biased in Class-A operation, drawing, respectively, 22 and 23 mA from 1.2 V supply. Compared to the power amplifier using conventional microstrip transmission lines, the one implemented with slow-wave transmission lines shows improved performances in terms of gain (5.6 dB against 3.3 dB), 1 dB output compression point (OCP1dB: 7 dBm against 5 dBm), saturated output power (Psat: >10 and 8 dBm, respectively), power-added efficiency (PAE: 16% instead of 6%), and die area without pads (Sdie: 0.059 mm2 against 0.069 mm2).

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Anpilogov, V. R., I. V. Zimin i Yu N. Chekushkin. "Dissipative Losses in the Microstrip Lines and Microstrip Antennas". Rocket-space device engineering and information systems 5, nr 3 (2018): 60–69. http://dx.doi.org/10.30894/issn2409-0239.2018.5.3.60.69.

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Chen, Chia-Mao, Shoou-Jinn Chang, Sung-Mao Wu, Yuan-Tai Hsieh i Cheng-Fu Yang. "Investigation of Compact Balun-Bandpass Filter Using Folded Open-Loop Ring Resonators and Microstrip Lines". Mathematical Problems in Engineering 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/679538.

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A balun-bandpass filter was proposed by using two folded open-loop ring resonators (OLRRs) to couple three microstrip lines. By tuning the size of the OLRR, the operating frequency of the balun-bandpass filter could be tuned to the needed value. By tuning the size of open stub at the end of microstrip lines, the balanced impedance of the balun-bandpass filter could also be tuned. The fabricated balun-bandpass filter had a wide bandwidth and a low insertion loss at center frequency of the passband. The balun-bandpass filter presented an excellent in-band balanced performance with common-mode rejection ratio more than 20 dB in the passbands. An advanced design methodology had been adopted based on EM simulation for making these designed parameters of OLRRs and microstrip lines. Good correlation was seen between simulation and measurement, and the result was that first run pass had been achieved in the majority of our designs.

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Князев, Н. С., А. И. Малкин i В. А. Чечеткин. "Методика измерения потерь в направляемых линиях передачи в миллиметровом диапазоне частот". Письма в журнал технической физики 48, nr 5 (2022): 36. http://dx.doi.org/10.21883/pjtf.2022.05.52155.18981.

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An experimental method was developed to determine losses in microstrip and coplanar transmission lines for devices operating in the frequency range 77 - 81 GHz. The parameters of the scattering matrices are obtained using a vector network analyzer and frequency upconverters. The calculation of losses in waveguide-coplanar and coplanar-microstrip junctions is made.

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Shirokov, I. B., I. V. Serdyuk, A. A. Azarov i E. I. Shirokova. "System for wireless power transfer". Ural Radio Engineering Journal 5, nr 1 (2021): 7–20. http://dx.doi.org/10.15826/urej.2021.5.1.001.

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The issues of wireless power transfer over short distances are considered. The approach may be used for wireless charging of batteries in unmanned vehicles. It is proposed to use the technique of microstrip structures for power transfer. The microstrip structures form a directional coupler on symmetrical strip lines when approaching by front parts. The length of the interaction lines is chosen several times longer than a quarter of the wavelength. Ballast resistors are excluded from the circuit. This approach leads to small losses of power transfer when the distance between microstrip structures changes over a wide range. Modeling of the operation of the power transfer system has been carried out, an experimental sample has been made and experimental studies have been carried out. The simulation and experiment are well accorded.

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Sharma, Arvind K. "Microstrip lines and slot lines, second edition". International Journal of RF and Microwave Computer-Aided Engineering 8, nr 1 (styczeń 1998): 77–78. http://dx.doi.org/10.1002/(sici)1099-047x(199801)8:1<77::aid-mmce11>3.0.co;2-j.

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Lim, Jongsik, Dal Ahn, Sang-Min Han, Yongchae Jeong i Haiwen Liu. "A Defected Ground Structure without Ground Contact Problem and Application to Branch Line Couplers". International Journal of Antennas and Propagation 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/232317.

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A new defected ground structure (DGS) microstrip line that is free from the ground contact problem is described together with its application example. The proposed DGS microstrip line adopts a double-layered substrate. The first layer contains the microstrip line and DGS patterns on the top and bottom planes as with the conventional DGS line. The second substrate, of which upper metal plane has already been removed, is attached to the bottom ground plane of the first layer. This structure prevents the ground plane of the first substrate with DGS patterns from making contact with the metal housing. The proposed DGS microstrip line has advantageous transmission and rejection characteristics, without the ground contact problem of DGS patterns, which has been a critical problem of previous DGS lines. A 10 dB branch line hybrid coupler is designed and measured, as an example of application of the proposed DGS microstrip line.

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Gobinath, A., N. Suresh Kumar i P. Rajeswari. "Reduction of Near-End and Far - End Crosstalk in Microwave and Millimetre Wave Band of Parallel Transmission Lines using Meander Shaped DMS". Journal of Physics: Conference Series 2466, nr 1 (1.03.2023): 012016. http://dx.doi.org/10.1088/1742-6596/2466/1/012016.

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Abstract This research proposes a unique design that makes use of a defective microstrip topology to decrease electromagnetic coupling between parallel high speed interconnects. The performance of this new microstrip construction with defects is evaluated using near-end crosstalk and far-end crosstalk. Serpentine shaped defected microstrip is introduced in one parallel of high speed interconnects and its performance is also compared the existing structure. In this research, the proposed defected microstrip structure (DMS) is simulated and compared with a conventional microstrip structure using Ansoft HFSS software which employs the Finite Element Method (FEM). Simulation results indicate that the DMS design effectively reduces crosstalk in comparison to the previous structure. It reduces more than 5dB near end crosstalk and more than 3dB far end crosstalk compared to conventional model.

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Peric, Mirjana, Sasa Ilic i Slavoljub Aleksic. "Shielded coupled multilayered microstrip lines analysis using HBEM". Serbian Journal of Electrical Engineering 13, nr 2 (2016): 175–87. http://dx.doi.org/10.2298/sjee160217003p.

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Shielded symmetrical coupled multilayered microstrip lines analysis have been done using the hybrid boundary element method (HBEM), which is developed a few years ago at the Faculty of Electronic Engineering in Nis. The quasi-TEM approximation is applied. Influences of different parameters as well as dimensions of such microstrip lines on characteristic parameters distribution are investigated. The results are presented in graphs and tables. In order to verify the obtained results, some comparative results are shown. The authors found them to be in very good agreement with the HBEM results.

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Orlov, Pavel, Talgat Gazizov i Aleksander Zabolotsky. "Comparative Electromagnetic and Quasi–Static Simulations of a Shortpulse Propagation along Microstrip Meander Delay Lines with Design Constraints". Journal of Electrical Engineering 67, nr 5 (1.09.2016): 387–89. http://dx.doi.org/10.1515/jee-2016-0056.

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Abstract A numerical analysis of microstrip meander delay lines is considered. Results of quasi-static and electromagnetic simulations are given. It is shown that when increasing a number of turns and proportionally reducing their length, distortions of a pulse signal in the line are reduced. At the same time, despite structure’s electrical width increase, the agreement between the results of quasi-static and electromagnetic analyses is improved. Thus, it is demonstrated that when designing the microstrip meander delay lines with minimal distortions, the quasi-static analysis is relevant.

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30

Chang, K., i J. Klein. "Dielectrically shielded microstrip (DSM) lines". Electronics Letters 23, nr 10 (7.05.1987): 535–37. http://dx.doi.org/10.1049/el:19870386.

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31

Xiaodong, Wu, i Lin Weigan. "Characteristics of microstrip transmission lines". Journal of Electronics (China) 7, nr 1 (styczeń 1990): 1–5. http://dx.doi.org/10.1007/bf02778715.

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Triki, Faouzi, i Habib Ammari. "Resonances for Microstrip Transmission Lines". SIAM Journal on Applied Mathematics 64, nr 2 (styczeń 2004): 601–36. http://dx.doi.org/10.1137/s0036139902418390.

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Pond, J., J. Claassen i W. Carter. "Kinetic inductance microstrip delay lines". IEEE Transactions on Magnetics 23, nr 2 (marzec 1987): 903–6. http://dx.doi.org/10.1109/tmag.1987.1064872.

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Brews, J. R. "Characteristic Impedance of Microstrip Lines". IEEE Transactions on Microwave Theory and Techniques 35, nr 1 (styczeń 1987): 30–34. http://dx.doi.org/10.1109/tmtt.1987.1133591.

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35

Hill, D. A., K. H. Cavcey i R. T. Johnk. "Crosstalk between microstrip transmission lines". IEEE Transactions on Electromagnetic Compatibility 36, nr 4 (1994): 314–21. http://dx.doi.org/10.1109/15.328861.

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Chen, Zihao, Wenxu Zhang i Kaixu Wang. "Single-Layer Interconnected Magneto-Electric Dipole Antenna Array for 5G Communication Applications". Electronics 12, nr 4 (12.02.2023): 922. http://dx.doi.org/10.3390/electronics12040922.

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A high-gain and wideband interconnected magneto-electric (ME) dipole on a single-layer PCB substrate is designed for 5G communication applications. Microstrip lines and coplanar striplines (CPSs) serve as transmission lines to connect the ME dipole elements along the E-plane and the H-plane directions, respectively. Impedance matching and sidelobe-level suppression are the key challenges to design a large-scale interconnected ME dipole antenna array. It is shown that impedance matching can be improved by introducing slots and adjusting the width of microstrip lines. Sidelobe level can be enhanced by properly choosing the length of the microstrip lines. A 5 × 5 interconnected ME dipole array is fabricated on a single layer of the RT/duroid 5880 substrate. The proposed antenna exhibits a measured −10 dB impedance bandwidth of 14.5 GHz (52% at 28 GHz) and a maximal peak realized gain of 20.44 dBi at 27.5 GHz with a 3 dB gain bandwidth of 3.5 GHz (12.5% at 28 GHz). The proposed antenna array is a good candidate for 5G communication applications due to its advantages of simple feeding structure, wide bandwidth, high gain, and low profile.

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37

Guan, Xuehui, Ping Gui, Tao Xiong, Baoping Ren i Lei Zhu. "Hybrid Microstrip/Slotline Ultra-Wideband Bandpass Filter with a Controllable Notch Band". International Journal of Antennas and Propagation 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/2398610.

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An ultra-wideband (UWB) bandpass filter (BPF) with a controllable notch band is presented by using hybrid microstrip/slotline structure. Firstly, a slotline resonator with symmetrically loaded stubs is fed by two microstrip lines to produce a UWB bandpass filtering response. Secondly, a microstrip triangular loop resonator is externally loaded over the slotline, and a notch band is introduced in the UWB passband. The notch band is determined by the perimeter of the loop resonator. Thirdly, two patches are added as the perturbation element to the corners of the microstrip resonator to excite a pair of degenerate modes. Bandwidth of the notch band can be tuned by properly selecting the patch size. Circuit model for the microstrip resonator loaded slotline is given and studied. Finally, the filter is designed, simulated, and measured. Measured results have agreed well with the simulated ones, demonstrating that a UWB filter with a controllable notch band has been realized.

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Sun, Xia Li, Qing Zhang i Shu Yan. "Design of an Active Phase Conjugation Circuit for Retrodirective Array in UHF Band". Applied Mechanics and Materials 43 (grudzień 2010): 201–6. http://dx.doi.org/10.4028/www.scientific.net/amm.43.201.

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An active phase conjugation circuit of retrodirective array which can be used in UHF band (890-960MHz) has been designed. Circuit of the retrodirective array consists of filters, mixers, dividers and other microwave devices. In this paper, microstrip filters and mixers are primarily designed. Divided matching circuit will be designed appropriate on the basis of the antenna element. Filters consist of microstrip coupled lines to conform with microstrip antenna arrays; to suppress the effect of RF input signals to output transmitted signals, selecting the image-rejection mixers. Simulation results of ADS show that all of the designed active devices display good performances.

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Sasic, Mubina, i Sehabbedin Taha Imeci. "Design of microstrip coupled-line bandpass filter". Heritage and Sustainable Development 3, nr 1 (8.04.2021): 44–52. http://dx.doi.org/10.37868/hsd.v3i1.55.

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This project contains basic information, design, 3D projection, simulation, and analysis of Microstrip Bandpass Filter. The filter was composed of the feed lines connected to the two ports with the parallel coupled lines between them. The separation between these elements is reduced to the minimum for the purpose of reducing the error. Ultimately, the microstrip bandpass filter was designed with a 400 MHz bandwidth. We end up with these result: at the 4.43 GHz, S11 parameter is -9.868 dB and S22 is -1.808 dB, while at the 4.83 GHz, S11 is -9.995 dB and S22 is -1.826 dB.

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40

AHMAD, T., M. A. HOSSAIN, A. K. RAY i Z. GHASSEMLOOY. "FUZZY BASED DESIGN OPTIMIZATION TO REDUCE THE CROSSTALK IN MICROSTRIP LINES". Journal of Circuits, Systems and Computers 13, nr 01 (luty 2004): 121–36. http://dx.doi.org/10.1142/s0218126604001210.

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This paper presents an investigation of the design optimization in microstrip lines to reduce the crosstalk level using Fuzzy Logic. In microstrip lines length and spacing, termination conditions of interconnection and output impedance of gates are the major components that cause crosstalk. In order to design high speed printed circuit board (PCB) with optimum interconnection configuration, it is essential to reduce the crosstalk to its minimum tolerance level. A design methodology is proposed to correlate electrical parameters and physical configuration of lines to the crosstalk phenomena. This design is subsequently optimized using Fuzzy Logic to reduce the level of crosstalk. A set of experiments is carried out to demonstrate the capabilities of the design and optimization methods. The effect of the geometrical configuration of the lines on crosstalk, particularly the spacing, is highlighted.

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41

Müller, Jens. "Wide Band Measurement of Dielectric Properties of Electronic Assembly Materials Inside an LTCC Fluidic Structure". Journal of Microelectronics and Electronic Packaging 11, nr 2 (1.04.2014): 64–69. http://dx.doi.org/10.4071/imaps.400.

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Assembly materials such as underfillers or glob top epoxies are typically not specified regarding their dielectric properties for frequencies higher than 1 MHz. However, their behavior should be known for a wider frequency range in order to implement the appropriate parameters for RF and microwave simulations and designs. Typical methods to measure permittivity and loss tangent are based on parallel plate capacitor measurement with an impedance or network analyzer (up to about 1 GHz), S-parameter measurement of filled waveguides, coaxial transmission lines, or resonance methods (e.g., split post resonator, slit cavity resonator, ring resonator, open resonator). Most of these methods require specific sophisticated sample preparation. The paper describes a novel method based on suspended or inverted microstrip evaluation in a 3D LTCC structure. Suspended and inverted microstrip lines have lower insertion losses than standard microstrip lines due to the air gap between the line and the ground plane (reduced dielectric losses). Low loss structures are necessary to be able to measure low loss dielectrics. Such suspended or inverted microstrip lines can be easily achieved in LTCC by implementing a cavity structure. Inlets and outlets allow for the cavity to be filled with fluids after an initial S-parameter measurement of line properties (i.e., impedance, insertion loss, phase velocity). Measuring is repeated once the assembly material is cured. The change in impedance, phase velocity, and insertion contains the information about the material under test. Its properties are derived by curve fitting methods with a 3D electromagnetic field simulator. It is also possible to implement line resonators instead of through lines. In the latter case, the resonant frequency shift and the quality factor contains the material information. The procedure is demonstrated on a multilayer LTCC substrate based on low loss DP 9k7 and a commercial underfill material.

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42

Müller, Jens. "Wide Band Measurement of Dielectric Properties of Electronic Assembly Materials Inside a LTCC Fluidic Structure". Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2013, CICMT (1.09.2013): 000041–46. http://dx.doi.org/10.4071/cicmt-tp22.

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Assembly materials like underfillers or glob top epoxies are typically not specified regarding their dielectric properties for frequencies higher than 1 MHz. However, their behavior should be known for a wider frequency range in order to implement the right parameters for RF and microwave simulations and designs. Typical methods to measure permittivity and loss tangent are based on parallel plate capacitor measurement with an impedance or network analyzer (up to about 1 GHz), S-parameter measurement of filled wave guides or coaxial transmission lines or resonance methods (e.g. split post resonator, slit cavity resonator, ring resonator, open resonator). Most of these methods require specific sophisticated sample preparation. The paper describes a novel method based on suspended or inverted microstrip evaluation in a 3D LTCC structure. Suspended and inverted microstrip lines have lower insertion losses than standard microstrip lines due to the air gap between the line and the ground plane (reduced dielectric losses). Low loss structures are necessary to be able to measure low loss dielectrics. Such suspended or inverted microstrip lines can be easily achieved in LTCC by implementing a cavity structure. In- and outlets allow filling the cavity with fluids after an initial S-parameter measurement of line properties (impedance, insertion loss, phase velocity). Measuring is repeated once the assembly material is cured. The change in impedance, phase velocity and insertion contains the information about the material under test. Its properties are derived by curve fitting methods with a 3D electromagnetic field simulator. It is also possible to implement line resonators instead of through lines. In the latter case, the resonant frequency shift and the quality factor contains the material information. The procedure is demonstrated on a multilayer LTCC substrate based on low loss DP 9k7 and a commercial underfill material.

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43

Alhalabi, H., H. Issa, E. Pistono, D. Kaddour, F. Podevin, A. Baheti, S. Abouchahine i P. Ferrari. "Miniaturized branch-line coupler based on slow-wave microstrip lines". International Journal of Microwave and Wireless Technologies 10, nr 10 (22.08.2018): 1103–6. http://dx.doi.org/10.1017/s1759078718001204.

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AbstractThis paper presents a miniaturized 3-dB branch-line coupler based on slow-wave microstrip transmission lines. The miniaturized coupler operating at 2.45 GHz is designed and implemented on a double-layer printed circuit board substrate with blind metallic vias embedded in the lower substrate layer providing the slow-wave effect. Based on this concept, a 43% size miniaturization is achieved as compared with a classical microstrip branch-line coupler prototype. The measured S parameters present a return loss of 25.5 dB and an average insertion loss equal to 0.05 dB at the operating frequency.

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Rajni, Rajni, Gurwinder Singh i Anupma Marwaha. "Modeling of Split Ring Resonators loaded microstrip line with different orientations". International Journal of Electrical and Computer Engineering (IJECE) 5, nr 6 (1.11.2015): 1363. http://dx.doi.org/10.11591/ijece.v5i6.pp1363-1371.

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This paper presents the different circuit approaches of the electric and magnetic interaction of Single Split Ring Resonator (SRR) loaded microstrip line. We loaded the microstrip line with planar square split ring resonator in different configurations and orientations. The modeling behavior of metamaterials-based microstrip lines loaded with single and two-mirrored split ring resonators is analyzed numerically in two orientations (with gap of SRR parallel and perpendicular to the line). The full wave simulations are performed for the single and two-mirrored split ring resonators loaded microstrip inside a waveguide with ‘High Frequency Structure Simulator’ software. The equivalent circuit parameters are obtained for the single split ring resonator loaded with microstrip line with the gap parallel and near to the line from transmission line theory that make use of just the resonance frequency and minimum of the reflection coefficient. The simulation of different orientations of split ring resonator gives better reflection coefficient and wider frequency.

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45

Chen, Yanbin, Xiaojuan Ren, Jimin Zhao, Xin Chen, Yuan Yao, Junsheng Yu i Xiaodong Chen. "Novel UHF RFID Near-Field Reader Antenna with Uniform Vertical Electric Field Distribution". International Journal of Antennas and Propagation 2020 (24.08.2020): 1–13. http://dx.doi.org/10.1155/2020/6078402.

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This paper presents two novel UHF RFID near-field reader antennas with uniform vertical electric field distribution. The two antennas have the following common characteristics. First, the radiating parts of the two antennas are simulated and fabricated by the microstrip lines and work using the leakage wave principle of microstrip lines. Second, the end of microstrip lines match the load to form a traveling wave mode of operation, so the two antennas have broadband characteristics. Third, both antennas are fed in a coaxial manner at the center of the antenna. The simulation and measurement results can show that the proposed three-branch antenna and four-branch antenna achieve good impedance matching in the range of 883–960 MHz and 870–960 MHz, respectively, and achieve uniform distribution of the vertical electric field component in a certain area. The reading areas of the three-branch antenna and the four-branch antenna are 70 mm × 70 mm × 90 mm and 100 mm × 100 mm × 120 mm (length × width × height), respectively. Due to the introduction of the ground plate, the antenna gain is low, which meets the design requirements of near-field antennas.

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46

Cheng, Chunxia, Fushun Zhang, Yangtao Wan i Fan Zhang. "Miniaturized High-Isolation Dual-Frequency Orthogonally Polarized Patch Antenna Using Compact Electromagnetic Bandgap Filters". International Journal of Antennas and Propagation 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/230316.

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A miniaturized dual-frequency dual-polarization microstrip patch antenna with high isolation between receiving and transmitting ports (operating at 2.1 GHz for receiving and at 2.5 GHz for transmitting) is presented in this paper. The proposed antenna consists of a modified rectangular radiating patch, two 50 Ω microstrip feed lines, and two EBG filters. Two coupling microstrip lines are employed to excite two orthogonal fundamental modes (TM10and TM01). The high isolation is achieved by embedding two novel EBG filters underneath two feed lines to reject the incoming signal from the opposite line. Multilayer configuration, miniaturized EBG filters, and modified rectangular radiation patch contribute to size reduction. The total size is 0.67λ × 0.67λ × 0.03λ , only quarter of the multilayer rectangular radiation patch antenna (1.33λ × 1.33λ × 0.03λ) using common EBG filters with the same performance. Measured results on the reflection coefficients, isolations, and gains for the two frequencies are provided, which agree well with the numerical simulations. Also, measured isolations and radiation patterns at both two resonant frequencies are compared with the antenna without filters. The results show that the proposed method improves isolation by more than 20 dB with little influence on the radiation patterns.

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47

Attaran, Ali, Rashid Rashidzadeh i Roberto Muscedere. "Rotman lens combined with wide bandwidth antenna array for 60 GHz RFID applications". International Journal of Microwave and Wireless Technologies 9, nr 1 (4.08.2015): 219–25. http://dx.doi.org/10.1017/s1759078715001208.

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This paper presents a novel technique to design a Rotman lens feeding a wide bandwidth microstrip patch antenna array for 60 GHz radio frequency identification (RFID) applications. The proposed scheme supports both location positioning and increases the communication range through beam forming. The antenna array is designed using λ/4 microstrip transmission lines to support high gain, directivity, and bandwidth. The progressive phase delay using the Rotman lens is realized independently using transmission lines to reduce the complexity of the design and improve the performance parameters. The dummy ports are terminated by λ/4 radial stubs which eliminates the need for via holes and expensive connectors which reduces the fabrication costs.

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Naqui, J., M. Durán-Sindreu i F. Martín. "Differential and Single-Ended Microstrip Lines Loaded with Slotted Magnetic-LC Resonators". International Journal of Antennas and Propagation 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/640514.

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This paper is focused on magnetic-LC (MLC) resonators, namely, slotted resonators that can be considered the complementary counterparts of the so-called electric-LC (ELC) resonators. Both resonators exhibit two symmetry planes (i.e., they are bisymmetric), one of them being an electric wall and the other a magnetic wall at the fundamental resonance. Therefore, compared to other electrically small resonators such as folded stepped impedance resonators (SIRs), split ring resonators (SRRs), and their complementary counterparts, MLC and ELC resonators exhibit a very rich phenomenology. In this paper, single-ended microstrip lines and differential microstrip lines loaded with MLC resonators are studied, and potential applications are highlighted.

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49

KHALAJ-AMIRHOSSEINI, MOHAMMAD. "OPTIMIZATION OF MICROSTRIP INTERCONNECTS CONTAINING ADDITIONAL CAPACITIVE COUPLING USING LEAST MEAN SQUARE METHOD". Journal of Circuits, Systems and Computers 15, nr 03 (czerwiec 2006): 321–29. http://dx.doi.org/10.1142/s0218126606003052.

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A suitable way to decrease far-end crosstalks in microstrip interconnects is to increase the capacitive coupling between two adjacent strip lines. In this paper a method is proposed to optimal design of microstrip interconnects containing additional discrete coupling capacitors. A suitable error function along with some constrained conditions is defined to determine optimal values of both interconnect parameters and the additional coupling capacitors. The method is verified using a comprehensive example.

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Huang, Wen, Wei Ruan i Fei Tan. "A Miniaturized 4 : 1 Unequal Wilkinson Power Divider Using Artificial Transmission Lines and Double-Sided Parallel-Strip Lines". International Journal of Antennas and Propagation 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/6751694.

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A 4 : 1 unequal Wilkinson power divider using microstrip artificial transmission lines (ATLs) is proposed. For the ATL, a series of meandered-line inductors, parallel-plate capacitors, and interdigital capacitors are employed. The designed power divider is composed of three ATLs, and a method has been proposed using technology of ATLs and double-sided parallel-strip lines (DSPSLs) to design line of high characteristic impedance. Microstrip line with very high characteristic impedance of over 150 Ω has been achieved by this method, which cannot be easily achieved by conventional transmission lines because of comparably thin conductor width. The fabricated 4 : 1 unequal power divider has good operational performance and occupies55.3 mm×37.8 mm, which is only about 40% of area compared to a conventional one at 0.9 GHz.

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