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Journal articles on the topic 'Modified Split Ring Resonator'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

B. Jalil, Mohd Ezwan, Mohamad Kamal A. Rahim, Osman B. Ayop, and Noor Asmawati Samsuri. "Size miniaturization of chipless RFID tag using metamaterial structure." Indonesian Journal of Electrical Engineering and Computer Science 15, no. 2 (August 1, 2019): 723. http://dx.doi.org/10.11591/ijeecs.v15.i2.pp723-732.

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A Chipless RFID based Modified Complementary Split Ring Resonator (MCSRR) with Different Width (DW) which is metamaterial structure is designed using PET substrate ( =3, loss tangent = 0.025 at 2 GHz) to miniaturize effective length size of conventional split ring resonator. The MCSRR structure with DW provides less size about 17% compared with the conventional MCSRR structure. The single MCSRR resonator with different width only requires a frequency range of 12 % of Complementary Split Ring Resonator (CSRR) resonator. The slotted MCSRR resonator is located underneath substrate and within substrate is connected with transmission lines. The insertion loss value of MCSRR resonator is used to encode ID information of chipless RFID with maximizing ID information using Frequency Position technique. The best swapping parameter for encoding ID number information is split gap of both ring compare with other parameter such as spacing between ring and width of ring.

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2

Bait-Suwailam, Mohammed M., Thamer S. Almoneef, and Saud M. Saeed. "FLEXIBLE METAMATERIAL ELECTROMAGNETIC HARVESTER USING MODIFIED SPLIT-RING RESONATOR." Progress In Electromagnetics Research M 95 (2020): 135–44. http://dx.doi.org/10.2528/pierm20051407.

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3

Abdul Hassain, Z. A., A. R. Azeez, M. M. Ali, and T. A. Elwi. "A Modified Compact Bi-Directional UWB Taperd Slot Antenna with Double Band-Notch Characteristics." Advanced Electromagnetics 8, no. 4 (September 10, 2019): 74–79. http://dx.doi.org/10.7716/aem.v8i4.1130.

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This research puts forward a design regarding a novel compact bi-directional UWB (1.9–10.6 GHz) tapered slot patch antenna that has dual band-notches characteristics within 3.4–3.9 GHz applicable for WiMax application and 5-6 GHz applicable for WLAN (IEEE 802.11a and HIPERLAN/2 systems). A parasitic quasi-trapezoidal shape single split ring resonator SRR is positioned to secure the first WiMax band-notch to minimize the electromagnetic interference occurring in WiMax band. A single circular complementary split-ring resonator (CSRR) is etched to secure the second band-notch. Simulated and measured results showed a good match, thereby signifying that the proposed antenna is an optimum candidate for UWB communication applications along with the guide lines design to employ the notch bands in the preferred frequency regions.

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4

Kumar, Arun, and Manisha Choudhary. "Dual Band Modified Split-Ring Resonator Microstrip Antenna for Wireless Applications." National Academy Science Letters 43, no. 3 (November 16, 2019): 237–40. http://dx.doi.org/10.1007/s40009-019-00845-7.

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5

Shaalan, Amer Basim, and Ammar Nadal Shareef. "Characteristics of Microstrip Fractal Antenna Shape Covered by Modified Split Ring Resonator." IOSR Journal of Electrical and Electronics Engineering 9, no. 4 (2014): 13–17. http://dx.doi.org/10.9790/1676-09411317.

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6

Troudi, Zied, Jan Macháč, and Lotfi Osman. "Compact dual‐band bandpass filter using a modified hexagonal split ring resonator." Microwave and Optical Technology Letters 62, no. 5 (May 2020): 1893–99. http://dx.doi.org/10.1002/mop.32258.

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7

Prabhakar, Dudla, C. Rajendra Babu, V. Adinarayana, and V. Prasad. "A Hybrid Approach on Metamaterial-Loaded Fractal Antenna Design." Applied Computational Electromagnetics Society 35, no. 9 (November 4, 2020): 1022–29. http://dx.doi.org/10.47037/2020.aces.j.350907.

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The paper provides the interoperable hybrid Grasshopper–Grey Wolf optimization (GHGWO) of the Square Split-Ring Resonator (SRR) metamaterial unit cell. This paper discusses the complex phase strategies of the electric and magnetic interplay of the charged microstrip line of the split ring resonator (SRR). Optimized unit of metamaterial cells for their bandwidth enhancement is packed into a new square fractal antenna. In the interim period of dual band efficiency, a new design is introduced for a microstrip line-feeding square fractal antenna with a faulty ground composition. In the second stage, a quasi-static SRR model is being used to streamline its structural parameters in an effort to reinforce the bandwidth so that optimized composition resonates at the required intensity area. In the GHGWO hybrid algorithm, SRR unit cell size limitations should be optimized and the convergence actions of the algorithm improved. Certain evolutions termed modified hybrid BF-PSO classical BFO, chaos PSO and IWO are being tested for efficiency of the Hybrid GHGWO algorithm. In the final stage, optimized SRR unit cells are stacked into a square fractal antenna that provides bandwidth output suited to wireless usages with upper and lower band. The prototype square fractal antenna without and with SRR unit cells is efficiently evaluated by trial results.

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8

Alqaisy, Mushtaq, Chandan Chakrabraty, Jawad Ali, and Adam R. H. Alhawari. "A miniature fractal-based dual-mode dual-band microstrip bandpass filter design." International Journal of Microwave and Wireless Technologies 7, no. 2 (April 24, 2014): 127–33. http://dx.doi.org/10.1017/s1759078714000622.

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In this paper, a fractal-based complementary split-ring resonator (CSRR) has been introduced as a defected ground structure (DGS) in the ground plane of a dual-mode microstrip bandpass filter to produce a new compact filter with dual-band response. The conventional double square ring resonator structure is modified such that its inner ring is made with a fractal shape instead of a square. Measured and simulation results show that the resulting filter offers a dual passband response; the higher passband is attributed to the dual-mode microstrip ring structure, whereas the lower passband is as a result of the embedded CSRR DGS structure. In addition, the results show that the position of the lower passband could be varied, to a certain extent, without affecting the position of the higher passband by applying higher fractal iteration levels to the inner split ring. These features, together with the compact size the proposed filter offers, make it suitable for use in a wide variety of dual-band communication applications. Measured results, carried out on filter prototypes, have been found in agreement with those theoretically predicted.

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9

Hall, L. D., T. Marcus, C. Neale, B. Powell, J. Sallos, and S. L. Talagala. "A modified split-ring resonator probe for NMR imaging at high field strengths." Journal of Magnetic Resonance (1969) 62, no. 3 (May 1985): 525–28. http://dx.doi.org/10.1016/0022-2364(85)90222-7.

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10

Choudhary, Dilip Kumar, and Raghvendra Kumar Chaudhary. "A compact CPW-based dual-band filter using modified complementary split ring resonator." AEU - International Journal of Electronics and Communications 89 (May 2018): 110–15. http://dx.doi.org/10.1016/j.aeue.2018.03.032.

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11

Liu, Yanxia, Lotfollah Shafai, Dustin Isleifson, and Cyrus Shafai. "Split Ring Antennas and Their Application for Antenna Miniaturization." Sensors 23, no. 2 (January 11, 2023): 846. http://dx.doi.org/10.3390/s23020846.

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This paper investigates the miniaturization capability of split ring array antennas embedded in a low-permittivity dielectric substrate, in comparison with the same-sized high-permittivity dielectric resonator antennas (DRAs). In order to understand the miniaturization performance, a size-fixed dielectric substrate with different split ring arrays is studied. The simulation results show that the miniaturization capability increases with decreased unit cell resonant frequency and/or increased unit cell induced permeability. Miniaturizations as high as 25.54 times that of a high-permittivity DRA are obtained with split rings, etched on a dielectric substrate having a low permittivity of 2.2. Furthermore, this excessive miniaturization does not come at the expense of excessive deterioration of the antenna impedance bandwidth, gain, and radiation efficiency. Consequently, the miniaturized split ring arrays still provide high gains over wider bandwidths. This inference is further verified by comparing the miniaturization and other antenna performance parameters with three other modified split ring configurations. To experimentally verify this work, a split ring antenna was fabricated and tested, and good agreement between the simulated and measured results was observed. The results of this study indicate that adding resonant metallic inclusions into low- permittivity DRAs significantly increases their miniaturization capability, without overly deteriorating the performance.

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12

Marcotegui, J. Antonio, Jesús Miguel Illescas, Aritz Estevez, and Francisco Falcone. "Compact Ultra Wide Band Microstrip Bandpass Filter Based on Multiple-Mode Resonator and Modified Complementary Split Ring Resonator." Scientific World Journal 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/402539.

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A new class of broadband microstrip filters for Ultra Wide Band (UWB) applications is proposed. In the design, different stages of parallel-coupled microstrip line and other stages with a Modified Complementary Split Ring Resonator (MCSRR)—a concept proposed here for the first time—are adjusted to obtain the desired response with broadband, sharp rejection, low insertion loss, and low return loss. Full wave simulation results as well as measurement results from fabricated prototypes are presented, showing good agreement. The proposed technique offers a new alternative to implement low-cost high-performance filter devices, applicable to a wide range of communication systems.

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13

Ghazali, Abu Nasar, Jabir Hussain, and Srikanta Pal. "A hybrid surface-to-surface transition-based UWB-BPF with multiple in-band interference suppression." International Journal of Microwave and Wireless Technologies 11, no. 2 (March 2019): 168–74. http://dx.doi.org/10.1017/s1759078719000242.

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AbstractA compact ultra-wideband (UWB) bandpass filter (BPF) based on surface-to-surface transition technology with features of extended stopband and integrated interference mitigation characteristics is proposed. The basic structure consists of a modified multiple-mode resonator (MMR)-based co-planar waveguide in the ground surface and coupled in broadside manner with the microstrip lines on the top surface. Later, two open-circuited stubs are embedded in the feeding lines and two complementary split ring resonators are etched in the MMR to implement multiple in-band transmission zeros so as to circumvent interference. A prototype is fabricated and measured to validate the results obtained in simulation. The proposed UWB-BPF is compact in size with overall dimensions of 17.82 by 11.08 mm2.

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14

Milosevic, Vojislav, Radovan Bojanic, and Branka Jokanovic. "Analytical modeling of antisymmetric split-ring resonators coupled with transmission line." International Journal of Microwave and Wireless Technologies 11, no. 4 (March 25, 2019): 359–67. http://dx.doi.org/10.1017/s1759078719000308.

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AbstractCoupled-mode theory is applied to obtain an analytic form of scattering parameters for a class of transmission line metamaterials with antisymmetric split-rings. The same structure is modeled with equivalent circuit, which includes electric and magnetic coupling with the line and inter-resonator coupling. Modified even/odd analysis is used to obtain scattering parameters from the equivalent circuit. These two methods are shown to be equivalent in a narrow band, and their constants related. The obtained results are compared with full-wave simulations and measurements, and it is shown that both methods give accurate approximation in one octave frequency band. The derived analytic expressions are suitable for study of resonant phenomena, with potential practical applications for filters, phase shifters, delay lines, and sensors.

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15

Jalil, Mohd Ezwan B., Mohamad Kamal A. Rahim, Himdi Mohamed, Noor Asmawati Binti Samsuri, Noor Asniza Murad, Raimi Dewan, Huda Bin A. Majid, Nur Biha Mohamed Nafis, Levy Olivia Nur, and Bambang Setia Nugroho. "High Capacity and Miniaturized Flexible Chipless RFID Tag Using Modified Complementary Split Ring Resonator." IEEE Access 9 (2021): 33929–43. http://dx.doi.org/10.1109/access.2021.3061792.

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16

Rengasamy, Rajkumar, Dileepan Dhanasekaran, Chinmay Chakraborty, and Suresh Ponnan. "Modified minkowski fractal multiband antenna with circular-shaped split-ring resonator for wireless applications." Measurement 182 (September 2021): 109766. http://dx.doi.org/10.1016/j.measurement.2021.109766.

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17

Rafi, Md Abdur, Benjamin D. Wiltshire, and Mohammad H. Zarifi. "Wideband Tunable Modified Split Ring Resonator Structure Using Liquid Metal and 3-D Printing." IEEE Microwave and Wireless Components Letters 30, no. 5 (May 2020): 469–72. http://dx.doi.org/10.1109/lmwc.2020.2980740.

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18

Islam, Mohammad, Farhad Ashraf, Touhidul Alam, Norbahiah Misran, and Kamarulzaman Mat. "A Compact Ultrawideband Antenna Based on Hexagonal Split-Ring Resonator for pH Sensor Application." Sensors 18, no. 9 (September 5, 2018): 2959. http://dx.doi.org/10.3390/s18092959.

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A compact ultrawideband (UWB) antenna based on a hexagonal split-ring resonator (HSRR) is presented in this paper for sensing the pH factor. The modified HSRR is a new concept regarding the conventional square split-ring resonator (SSRR). Two HSRRs are interconnected with a strip line and a split in one HSRR is introduced to increase the electrical length and coupling effect. The presented UWB antenna consists of three unit cells on top of the radiating patch element. This combination of UWB antenna and HSRR gives double-negative characteristics which increase the sensitivity of the UWB antenna for the pH sensor. The proposed ultrawideband antenna metamaterial sensor was designed and fabricated on FR-4 substrate. The electrical length of the proposed metamaterial antenna sensor is 0.238 × 0.194 × 0.016 λ, where λ is the lowest frequency of 3 GHz. The fractional bandwidth and bandwidth dimension ratio were achieved with the metamaterial-inspired antenna as 146.91% and 3183.05, respectively. The operating frequency of this antenna sensor covers the bandwidth of 17 GHz, starting from 3 to 20 GHz with a realized gain of 3.88 dB. The proposed HSRR-based ultrawideband antenna sensor is found to reach high gain and bandwidth while maintaining the smallest electrical size, a highly desired property for pH-sensing applications.

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19

Afsar, Salah Uddin, Mohammad Rashed Iqbal Faruque, Mohammad Jakir Hossain, Mayeen Uddin Khandaker, Hamid Osman, and Sultan Alamri. "Modified Hexagonal Split Ring Resonator Based on an Epsilon-Negative Metamaterial for Triple-Band Satellite Communication." Micromachines 12, no. 8 (July 26, 2021): 878. http://dx.doi.org/10.3390/mi12080878.

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A triple-band epsilon-negative (ENG) metamaterial based on a split ring resonator (SSR) with a modified hexagonal-shaped metal strip proposed in this study is a new combination of a single slit square resonator and a modified hexagonal-shaped metal strip. The desired unit cell FR-4 (lossy) that was selected as the substrate was 1.6 mm thick. Following the assessment of the unit cell, a high-frequency electromagnetic simulator like the computer simulation technology (CST) microwave studio was applied to assess the S-parameters. The proposed design exhibited resonance at 2.89, 9.42, and 15.16 GHz. The unit cell also demonstrated negative permittivity in the frequency ranges 2.912–3.728 GHz, 9.552–10.144 GHz, and 15.216–17.328 GHz, along with a negative refractive index. An effective medium ratio (EMR) of 11.53 is an indicator of the goodness of the metamaterial unit cell. It is deliberate at the lowermost resonance frequency of 2.89 GHz. Moreover, the simulated results that were validated using HFSS and equivalent circuit model indicated slight variations. The proposed design was finalised based on several parametric studies, including design optimisation, different unit cell sizes, various substrate materials, and different electromagnetic (EM) field propagations. The proposed triple band (S, X, and Ku bands) negative permittivity metamaterial unit cell can be utilised for various wireless applications, such as microwave communication, satellite communication, and long-distance radio communication.

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20

Alaa Eldeen, Abd Elmoneim Mohamed. "PROPAGATION BELOW CUTOFF IN METALLIC WAVEGUIDE LOADED BY TWO SLABS WITH MODIFIED SPLIT RING RESONATOR." Progress In Electromagnetics Research M 71 (2018): 137–44. http://dx.doi.org/10.2528/pierm18061402.

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21

Kumar, Arun, and Manisha Choudhary. "Modified series-fed dipole pair antenna using split-ring resonator directors for dual-band operation." Journal of Taibah University for Science 12, no. 2 (March 4, 2018): 197–201. http://dx.doi.org/10.1080/16583655.2018.1451065.

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22

Elsheakh, Dalia M., and Esmat A. Abdallah. "Ultra-wide-bandwidth (UWB) microstrip monopole antenna using split ring resonator (SRR) structure." International Journal of Microwave and Wireless Technologies 10, no. 1 (January 23, 2018): 123–32. http://dx.doi.org/10.1017/s1759078717001131.

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This paper presents a procedure to model an ultra wide-bandwidth (UWB) microstrip monopole antenna. The proposed antenna is composed of three different lengths of semi-circular shapes connected with circular disk and half circular modified ground plane. The proposed antenna has a size of 50 × 50 mm2on a low-cost FR4 substrate. The antenna demonstrates impedance bandwidth of −10 dB extended from 1.5 to 11 GHz with discontinuous bandwidth at different interior operating bands. Two pairs of split ring resonator as metamaterial structure cells are inserted closely located from feeding transmission line of the antenna to achieve good impedance matching over the entire band of operation and improve the antenna performance. The fundamental parameters of the antenna including reflection coefficient, gain, radiation pattern and group delay are obtained and they meet the acceptable UWB antenna standard. High-frequency structure simulator ver. 14 is used as full-wave electromagnetic solver then the prototypes are fabricated and measured. Results show that the antenna is very suitable for the applications in UWB as well as wireless communication systems.

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23

Sadabadi, Hamid, Ali Bostani, and Amin S. Esmaeili. "Reconfigurable Modular Platform for Prolonged Sensing of Toxic Gases in Particle Polluted Environments." Chemosensors 9, no. 11 (November 22, 2021): 328. http://dx.doi.org/10.3390/chemosensors9110328.

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The prolonged sensing of toxic gases in polluted particles and harsh environments is a challenging task that is also in high demand. In this work, the proof of principle of a sensitive, low-cost, and low-maintenance reconfigurable platform for filter-free and continuous ammonia (NH3) sensing in polluted environments is simulated. The platform can be modified for the detection of various toxic gases and includes three main modules: a microfluidic system for in-line continuous dust filtering; a toxic gas adsorption module; and a low-frequency microwave split-ring resonator (SRR). An inertia-based spiral microfluidic system has been designed and optimized through simulation for the in-line filtration of small particles from the intake air. Zeolite Y is selected as the adsorbent in the adsorption module. The adsorption module is a non-metallic thin tube that is filled with zeolite Y powder and precisely fixed at the drilled through-hole into the 3D microwave system. For the sensing module, a low-frequency three-dimensional (3D) split-ring resonator is proposed and optimally designed. A microwave resonator continuously monitors the permittivity of zeolite Y and can detect small permittivity alterations upon the presence of ammonia in the intake air. The microwave resonator is optimized at a frequency range of 2.5–3 GHz toward the detection of ammonia under different ammonia concentrations from 400 to 2800 ppm. The microwave simulation results show a clear contrast of around 4 MHz that shifts at 2.7 GHz for 400 ppm ammonia concentration. The results show the proof of principle of the proposed microfluidic-microwave platform for toxic gas detection.

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24

Wu, Wen-Jing, Wen-Sheng Zhao, Da-Wei Wang, Bo Yuan, and Gaofeng Wang. "Ultrahigh-Sensitivity Microwave Microfluidic Sensors Based on Modified Complementary Electric-LC and Split-Ring Resonator Structures." IEEE Sensors Journal 21, no. 17 (September 1, 2021): 18756–63. http://dx.doi.org/10.1109/jsen.2021.3090086.

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25

Danaeian, Mostafa, Ali‐Reza Moznebi, and Kambiz Afrooz. "A novel super compact half‐mode substrate‐integrated waveguide filter using modified complementary split‐ring resonator." International Journal of RF and Microwave Computer-Aided Engineering 29, no. 6 (March 15, 2019): e21709. http://dx.doi.org/10.1002/mmce.21709.

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26

Majid, H. A., and M. K. A. Rahim. "Parametric studies on left-handed metamaterial consist of modified split-ring resonator and capacitance loaded strip." Applied Physics A 103, no. 3 (April 8, 2011): 607–10. http://dx.doi.org/10.1007/s00339-011-6373-5.

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27

Huang, Yongjun, Guangjun Wen, and Jian Li. "Compact microstrip triplexer based on twist‐modified asymmetric split‐ring resonators." Electronics Letters 50, no. 23 (November 2014): 1712–13. http://dx.doi.org/10.1049/el.2014.2805.

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28

Patel, Upesh, and Trushit K. Upadhyaya. "DUAL BAND PLANAR ANTENNA FOR GSM AND WIMAX APPLICATIONS WITH INCLUSION OF MODIFIED SPLIT RING RESONATOR STRUCTURE." Progress In Electromagnetics Research Letters 91 (2020): 1–7. http://dx.doi.org/10.2528/pierl20031907.

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29

Kukreja, Jaspreet, Dilip Kumar Choudhary, and Raghvendra Kumar Chaudhary. "CPW fed miniaturized dual-band short-ended metamaterial antenna using modified split-ring resonator for wireless application." International Journal of RF and Microwave Computer-Aided Engineering 27, no. 8 (May 15, 2017): e21123. http://dx.doi.org/10.1002/mmce.21123.

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30

Hossain, Md Bellal, Mohammad Rashed Iqbal Faruque, Mohammad Tariqul Islam, Mayeen Uddin Khandaker, Nissren Tamam, and Abdelmoneim Sulieman. "Modified Coptic Cross Shaped Split-Ring Resonator Based Negative Permittivity Metamaterial for Quad Band Satellite Applications with High Effective Medium Ratio." Materials 15, no. 9 (May 9, 2022): 3389. http://dx.doi.org/10.3390/ma15093389.

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This research article describes a modified Coptic cross shaped split ring resonator (SRR) based metamaterial that exhibits a negative permittivity and refractive index with a permeability of nearly zero. The metamaterial unit cell consists of an SRR and modified Coptic cross shaped resonator providing quadruple resonance frequency at 2.02, 6.985, 9.985 and 14.425 GHz with the magnitude of −29.45, −25.44, −19.05, and −24.45 dB, respectively. The unit cell that was fabricated on a FR-4 substrate with a thickness of 1.6 mm has an electrical dimension of 0.074λ × 0.074λ; the wavelength (λ) is computed at the frequency of 2.02 GHz. The computer simulation technology (CST) microwave studio was employed to determine the scattering parameters and their effective medium properties, i.e., permittivity, permeability and refractive index, also calculated based on NRW (Nicolson–Ross–Weir) method through the implementation of MATLAB code. The frequency range of 2.02–2.995 GHz, 6.985–7.945 GHz, 9.985–10.6 GHz, and 14.425–15.445 GHz has been found for negative permittivity. An effective medium ratio (EMR) of 13.50 at 2.02 GHz shows that the proposed unit cell is compact and effective. The lumped component based equivalent circuit model is used to validate with simulation results. The proposed unit cell and its array were fabricated for experimental verification. The results show that the simulation result using CST and high-frequency structure simulator (HFSS) simulator, equivalent circuit model result using advanced design system (ADS) simulator and measurement results match each other better. Its near zero permeability, negative permittivity, negative refractive index, high EMR and simple unit cell design allow the proposed metamaterial to be used for S-, C-, X- and Ku-band satellite applications.

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31

al-Behadili, Amer Abbood, Iulia Andreea Mocanu, Norocel Codreanu, and Mihaela Pantazica. "Modified Split Ring Resonators Sensor for Accurate Complex Permittivity Measurements of Solid Dielectrics." Sensors 20, no. 23 (November 30, 2020): 6855. http://dx.doi.org/10.3390/s20236855.

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In this paper, a sensor using modified Split Ring Resonators (SRRs) is designed, simulated, fabricated, and used for advanced investigation and precise measurements of the real part and imaginary part solid dielectrics’ permittivity. Adding vertical strips tightly coupled to the outer ring of the SRR leads to the appearance of two resonant frequencies at 1.24 GHz and 2.08 GHz. This modified geometry also assures an improved sensitivity. Using the full wave electromagnetic solver, both the unloaded and loaded sensors are investigated. The numerical simulations are used to develop a mathematical model based on a curve fitting tool for both resonant frequencies, allowing to obtain analytical relations for real and imaginary parts of permittivity as a function of the sample’s thickness and quality factor. The sensor is designed and fabricated on 1.6 mm thick FR-4 substrate. The measurements of different samples, such as transparent glass, acrylic glass, plexiglass, and Teflon, confirm that the modified SRR sensor is easy to implement and gives accurate results for all cases, with measurement errors smaller than 4.5%. In addition, the measurements highlight the importance of the second resonant frequency in the cases in which numerical limitations do not allow the usage of the first resonant frequency (1 mm thick sample).

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32

Raval, Falguni, Y. P. Kosta, and Harshita Joshi. "Dual-band patch antenna with complementary split ring resonators loaded modified ground plane." International Journal of Applied Electromagnetics and Mechanics 43, no. 3 (August 8, 2013): 227–35. http://dx.doi.org/10.3233/jae-131696.

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33

Joshi, Neetu, and Nagendra P. Pathak. "Tunable wavelength demultiplexer using modified graphene plasmonic split ring resonators for terahertz communication." Photonics and Nanostructures - Fundamentals and Applications 28 (February 2018): 1–5. http://dx.doi.org/10.1016/j.photonics.2017.10.004.

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34

Wang, Jiafu, Shaobo Qu, Jieqiu Zhang, Hua Ma, Yiming Yang, Chao Gu, Xiang Wu, and Zhuo Xu. "A TUNABLE LEFT-HANDED METAMATERIAL BASED ON MODIFIED BROADSIDE-COUPLED SPLIT-RING RESONATORS." Progress In Electromagnetics Research Letters 6 (2009): 35–45. http://dx.doi.org/10.2528/pierl08120708.

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35

Falcone, Francisco, and Javier Gil. "Frequency Selective Properties of Coaxial Transmission Lines Loaded with Combined Artificial Inclusions." Scientific World Journal 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/731947.

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The properties of a modified coaxial transmission line by periodic inclusions will be discussed. The introduction of split ring resonators, conductor stubs, air gaps, and combination of these gives rise to new frequency selective properties, such as stopband or passband behavior, observable in planar as well as volumetric metamaterial structures. These results envisage new potential applications and implementation of devices in coaxial transmission line technology.

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36

Nordin, Mimi Aminah Wan, Mohammad Tariqul Islam, and Norbahiah Misran. "DESIGN OF A COMPACT ULTRAWIDEBAND METAMATERIAL ANTENNA BASED ON THE MODIFIED SPLIT-RING RESONATOR AND CAPACITIVELY LOADED STRIPS UNIT CELL." Progress In Electromagnetics Research 136 (2013): 157–73. http://dx.doi.org/10.2528/pier12100708.

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37

Belenguer, Angel, Alejandro L. Borja, and Vicente E. Boria. "Balanced Dual Composite Right/Left-Handed Microstrip Line With Modified Complementary Split-Ring Resonators." IEEE Antennas and Wireless Propagation Letters 12 (2013): 880–83. http://dx.doi.org/10.1109/lawp.2013.2271983.

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38

Zhang, Wang Zhou, Zhu Ying Li, and Ye Liu. "Comparison of Two Methods of Solving Electromagnetic Parameters of Metamaterials with the Unit Cell of Symmetrically Arranged SRRs." Key Engineering Materials 531-532 (December 2012): 351–57. http://dx.doi.org/10.4028/www.scientific.net/kem.531-532.351.

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Based on the principle that metamaterials-composite structured materials, in which permittivity(ε)and permeability(μ)are both negative in some frequencice, can be structured with periodically arranged SRRs and thin metallic wires which have negative effective permeability and negative effective permittivity respectively, the circular structure of SRRs was modified and a new split-ring resonator with symmetric structure was proposed. A detailed description of the design and simulation procedure was given simultaneously. According to the pattern of symmetric SRRs, ε and μ were calculated in analytic formula. Furthermore, metamaterials with symmetric SRRs was simulated with the software ANSOFT, and electromagnetic parameters were retried from S parameter. From analytic result and the retrieval result of electromagnetic parameters, left-handed behavior was obvious in a specific frequency range and the permittivity, the permeability and the index of refraction are all negative.

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D., Roopashree, Shruthi K. N., R. Bhagyalakshmi, and Chaithra K. N. "Design and Minimization of Mutual Coupling Steered Array Lens Antenna for 5G Communication." WSEAS TRANSACTIONS ON ELECTRONICS 13 (December 31, 2022): 147–58. http://dx.doi.org/10.37394/232017.2022.13.20.

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Examining and evaluating the improved microstrip patch antenna to enhance the performance by the initial objectives are the main contribution of this paper. To achieve multiband operation, the patch's shape is first adjusted later microstrip patch with the slot presented. With the help of the Ansoft HFSS antenna simulator, functional analysis has been shown to examine the impact on antenna resonant frequency. A probe-driven microstrip patch antenna imprinted on FR4 epoxy substrate with 1.6mm thickness and a dielectric constant of 4.4 is developed in this work via the HFSS tool for wireless applications operating between 2 to 5GHz. To achieve multiband operation, the structure of the patch is varied. The impacts on antenna resonant frequency are examined through numerical simulations. The length, as well as the width of a traditional patch antenna, is initially computed, and further, an appropriate patch dimension of 28.3mm x 36.9mm has been determined. For multiband operation over the frequency ranging between 2 and 5GHz wireless applications, a probe-driven microstrip patch antenna imprinted on FR4 epoxy substrate with 1.6mm thickness and a dielectric constant of 4.4 is built via the HFSS tool. The proposed architecture of a traditional microstrip patch antenna is imprinted on an FR4 epoxy substrate with a 1.6mm thickness and a 4.4 dielectric constant. The proposed antenna design is illustrated for the 3D structure of the Mutual Coupling Steered Array-Lens Antenna System (MPA) with an improved patch. To achieve multiband operation, two slots are inserted on the edges of the patch, and both the slots are 2mm wide, as well as the depth of the slots is modified to see how it corresponds to the resonant frequency. This work is mainly concentrated on (i) Examining as well as evaluating the improved microstrip patch antenna to enhance its performance, (ii) Examining, evaluating, as well as assessing the performance of an improved split ring resonator metamaterial, and (iii) Exploring, analyzing, as well as evaluating the performance of dielectric lens base patch array antennas and (iv) Developing as well as analyzing the transmission line phase shifter. The groundwork for developing this work is being carried out, and a comparative study is made on (i) techniques for improving the antenna's performance through the application of a modified patch antenna, a Modified split ring resonator, a Dielectric lens structure, and Transmission line phase shifter.

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S., Sesha Vidhya, Rukmani Devi, and Shanthi K. G. "Computer-Aided Diagnosis of Muscle Mass through Antenna as a Sensor." Journal of Sensors 2022 (December 22, 2022): 1–11. http://dx.doi.org/10.1155/2022/4465377.

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Wireless body area network (WBAN) incorporates a wireless sensor network and wearable devices in miniature size. In this paper, a dual-band microstrip patch (DBMSP) antenna as a sensor with a modified split ring resonator (SRR) and defective ground structure (DGS) is proposed for muscle mass measurement and prediction. Modified SRR on the ground plane forms a defected ground structure (DGS) for back radiation reduction and suits muscle mass measurement. The proposed dual-band microstrip patch antenna resonates at 5.2 GHz and 8.4 GHz, with impedance bandwidth of about 0.9 GHz and 1.89 GHz, input reflection coefficient is about -21.12 dB and -14.5 dB, respectively. This DBMSP antenna has an efficiency of 99.9%, with a negligible amount of specific absorption rate (SAR). From the proposed DBMSP antenna sensor, muscle mass is predicted from human muscle. The proposed antenna is fixed on the ventral surface of the forearm and biceps. DBMSP antenna sensor detects electromagnetic energy from muscle tissues under radiating near-field conditions. The muscle tissue signal is acquired through the proposed DBMSP antenna. The acquired antenna process with nondecimated wavelet transform (NDWT) and discrete wavelet transform (DWT) algorithms for noise reduction. Further, early prediction of muscle mass prevents humans from lack of protein and oxygen levels in the blood and avoids major issues in human health. The proposed DBMSP antenna-based muscle mass measurement achieves 89% accuracy when compared with laboratory measurement.

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V Ramakrishna, T., B. T P Madhav, M. Venkateswara Rao, A. Babu Rao, A. Sunaina, A. Avinash, and B. Shivani. "SRR loaded half-mode substrate integrated waveguide monopole slot antenna for multiband applications." International Journal of Engineering & Technology 7, no. 1.1 (December 21, 2017): 560. http://dx.doi.org/10.14419/ijet.v7i1.1.10166.

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In this article A two layered printed microstrip line monopole slot antenna is proposed for multiband applications. The proposed antenna comprises of size 47*40*1mm with a modified half mode substrate integrated waveguide (M-HMSIW). By changing the slot width at the bottom ground the multiband characteristics has been obtained. A split ring resonator is placed on beside the patch to enhance the characteristics such as gain and bandwidth of the antenna. The proposed antenna works in the region of LTE band (2.1GHz) and WLAN (5.7GHz) and it also holds some applications at x-band applications. The simulated return loss and varied parametric vswr of the proposed antenna has been analyzed using ANSYS EM tool. The simulated results state a peak gain of 22dB and average gain of 5.7 dB. The result of the proposed antenna states that it is the best suitable for various multiband applications

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Kim, Jangyeol, Nam Kim, and Seungwoo Lee. "A broadband antenna using the modified ground plane with a complementary split ring resonator for 5-GHz WLAN band-notched performance." Microwave and Optical Technology Letters 54, no. 1 (November 22, 2011): 1–3. http://dx.doi.org/10.1002/mop.26512.

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Musaed, Alya Ali, Samir Salem Al-Bawri, Mohammad Tariqul Islam, Ahmed Jamal Abdullah Al-Gburi, and Mandeep Jit Singh. "Tunable Compact Metamaterial-Based Double-Negative/Near-Zero Index Resonator for 6G Terahertz Wireless Applications." Materials 15, no. 16 (August 16, 2022): 5608. http://dx.doi.org/10.3390/ma15165608.

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This paper introduces the tunability performance, concept, and analysis of a unique and miniaturized metamaterial (MTM) unit cell covering the upcoming 6G applications. The proposed metamaterial consists of two metallic star-shaped split-ring resonators (SRR). It has a line segment placed in the middle of the structure, which can feature tunable characteristics. The proposed design provides dual resonances of transmission coefficient S21 at 0.248 and 0.383 THz with a significant operating frequency span of 0.207–0.277 and 0.382–0.390 THz, respectively. Moreover, wide-range achievement, negative permittivity, double-negative (DNG) refractive index, and near-zero permeability characteristics have been exhibited in two (z and y) principal wave propagation axes. The resonance frequencies are selective and modified by adjusting the central slotted-strip line length. Furthermore, the metamaterial is constituted on a polyimide substrate while the overall dimensions are 160 × 160 μm2. A numerical simulation of the proposed design is executed in CST microwave studio and has been compared with advanced design software (ADS) to generate the proposed MTM’s equivalent circuit, which exhibits a similar transmission coefficient (S21).

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Nasiri, Badr, and Jamal Zbitou. "A new design of stepped antenna loaded metamaterial for RFID applications." Bulletin of Electrical Engineering and Informatics 10, no. 5 (October 1, 2021): 2661–66. http://dx.doi.org/10.11591/eei.v10i5.2675.

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Radio frequency identification is being overloaded with data information, making wideband band antennas very appealing. In this paper, we present a new design of dual band antenna for RFID reader applications operating at 2.45Gz and 5.8GHz with an average gain of 1.16dB at the lower frequency band and 3.2dB at the higher frequency band. The antenna is designed on an FR-4 substrate having a relative dielectric constant of 4.4 and loss tangent of 0.025. The proposed antenna is simulated, designed and, optimized using CST Microwave Studio and has a small size of 32 mm x 26 mm x 1.6 mm. The antenna consists of a steeped rectangular patch antenna using a partial ground plane loaded a modified split ring resonator. The metamaterial structure was designed and optimized to operate at 2.45GHz and its effective parameters was verified using the Nicolson-Ross Weir method. The performance of the proposed antenna is confirmed by another 3D electromagnetic solver HFSS.

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Saibu, Suhailah, and Mohd Ali Lee Razak. "‘Folded-Line’ Left Handed Metamaterial for Efficient Architecture Implementation." Applied Mechanics and Materials 892 (June 2019): 127–33. http://dx.doi.org/10.4028/www.scientific.net/amm.892.127.

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The design of artificial metamaterial (MTM) has been proposed as an effective medium with extracted scattering parameter by applying Nicolson-Ross-Weir (NWR) equation to achieved negative permittivity and permeability. The novel architecture of ‘Folded-Line’ Left-handed metamaterial (FL-LHM) consist of split ring resonator SRR is designed and modified using LC lump elements analysis to extend bandwidth and operational frequency at 6 GHz to 12 GHz. In this study, we proposed metamaterial novel unit cell designs and simulate the performance in terms of the distribution of electric and magnetic fields, absorption, transmittance and reflectance. The unit cell of FL-LHM as medium allows controlling electromagnetic waves can cause backwave propagation is observed electromagnetic response that current induced in the closed FL-LHM unit cell. This design has its own advantage in term of FL-LHM parameter width, thickness, and absorption bandwidth and transmittance wavelength, might be severely important for particular purposes such as waveguiding or sensing application.

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Li, Jian, Yongjun Huang, Guangjun Wen, Xiaolin Xue, and Jiaming Song. "Compact and high‐selectivity microstrip bandpass filter using two‐stage twist‐modified asymmetric split‐ring resonators." Electronics Letters 51, no. 8 (April 2015): 635–37. http://dx.doi.org/10.1049/el.2014.3988.

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Sen, Sarbani, Tamasi Moyra, and Dwipjoy Sarkar. "Modelling and validation of microwave LPF using modified rectangular split ring resonators (SRR) and defected structures." AEU - International Journal of Electronics and Communications 88 (May 2018): 1–10. http://dx.doi.org/10.1016/j.aeue.2018.02.009.

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Mahmood, Ahmed, Gölge Ögücü Yetkin, and Cumali Sabah. "Design and Fabrication of a Novel Wideband DNG Metamaterial with the Absorber Application in Microwave X-Band." Advances in Condensed Matter Physics 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/1279849.

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A novel metamaterial, which exhibits a wideband double negative behavior in X-band, is proposed, designed, and investigated in this paper. The metamaterial is composed of modified S-shaped split-ring resonators (S-SRR). The periodic structure is designed and simulated using CST MWs. Next, the experiments are carried out, and it is shown that the simulation and the experimental results agree well and the designed structure has a wide bandwidth in X-band. An absorber application of this metamaterial is also provided, and the structure can be used as an absorber with absorption rate of over 80% for the polarization angles between 0° and 40°.

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Elhabchi, M., M. N. Srifi, and R. Touahni. "A Novel Dual Band Hexagonal Antenna for Bluetooth and Uwb Applications With Single Band Notched." Advanced Electromagnetics 7, no. 5 (November 18, 2018): 63–68. http://dx.doi.org/10.7716/aem.v7i5.755.

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This paper presents a regular hexagonal antenna for ultra wide bandwidth (UWB). Then this antenna is modified to obtain a dual band with single band notched.The Bluetooth band is integrated in ultrawideband (UWB) when the antenna is loaded by pair of inverted 𝛤-shaped strips.To avoid interference with the uwb systems , the wireless local area network of 5.72–5.825 GHz (IEEE 802.11a) is notched by incorporating a complementary split ring resonator (SRR) slot within the hexagonal shaped . The operating frequency ranges of the proposed antenna are 2.22 GHz - 2.52 GHz and 3.5 GHz - 10 GHz, which covers Bluetooth (2.4 GHz - 2.484 GHz) and UWB (3.1 GHz - 10.6 GHz) band, besides the range of Wlan (5.72 GHz - 5.825 GHz) with return loss more than 10 dB. The performance of the antenna is simulated and optimized by CST Microwave Studio and validated against using Ansoft HFSS . Surface current distributions is used to analyze the effects of the slot and strips. The antenna shows an acceptable gain over both Bluetooth and UWB bands. In the band notched regions, the gain reduces from its normal value to about 4 dBi at 5.75GHz.

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Sedghi, Mohammad Sadegh, Mohammad Naser-Moghadasi, and Ferdows B. Zarrabi. "Microstrip antenna miniaturization with fractal EBG and SRR loads for linear and circular polarizations." International Journal of Microwave and Wireless Technologies 9, no. 4 (June 23, 2016): 891–901. http://dx.doi.org/10.1017/s1759078716000726.

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In this paper, combination of electromagnetic band gap (EBG) and split-ring resonator (SRR) loads with fractal formation for miniaturization of microstrip antenna is noticed. Here two different shapes of antenna have been studied with two well-known metamaterial structures as parasitic elements. A conventional microstrip antenna, which is surrounded by four EBG unit cells, is chosen as the first antenna. It has an effective resonance at 2.5. The Minkowski fractal method is applied to EBG unit cells in this stage. The Minkowski fractal structure is implemented for accession of effective capacitance in EBG unit cells. The second antenna frequencies are 2.5 and 5.9 GHz. It contains a slot structure with four SRRs, used for making parasitic elements and for achieving multi-band characteristic. The fractal method is used to improve the inductance of SRR structure by increasing the effective length of microstrip line. At this stage, the applied fractal structure has been modified, so that the frequency of wireless application could be achieved. In the last step, by some changes in feed line of the slot antenna, circular polarization (CP) is obtained for the second antenna, which shows that SRR load can be helpful for making the CP.

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