Relevant bibliographies by topics / Open-ended microwave system

Academic literature on the topic 'Open-ended microwave system'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Open-ended microwave system"

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Shi, Jia Ming, Quirino Balzano, and Christopher C. Davis. "Broad Band Microwave Dielectric Measurement of Liquids with an Open-Ended Coaxial Probe." Applied Mechanics and Materials 333-335 (July 2013): 191–98. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.191.

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The principles of the open-ended coaxial probe technique for the measurement of permittivity are described. Measurements of dielectric properties are carried out over a frequency range from 300MHz to 50GHz, with a system comprising an Agilent E8364B network analyzer and a connected 2.2mm diameter open-ended coaxial probe. Water, methanol and salines of 0.1M, 0.2M, 0.6M are used as calibration liquids or liquids to be measured. Measured permittivities are presented and compared with those calculated from the Cole-Cole equation. It is shown that, in order to get good results, the calibration liquid should be similar to the liquid being measured in dielectric properties.
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Adamietz, Raphael, Marc P. Y. Desmulliez, Sumanth Kumar Pavuluri, Tim Tilford, Chris Bailey, Thomas Schreier-Alt, and Jens Warmuth. "Reliability Testing and Stress Measurement of QFN Packages Encapsulated by an Open-Ended Microwave Curing System." IEEE Transactions on Components, Packaging and Manufacturing Technology 9, no. 1 (January 2019): 173–80. http://dx.doi.org/10.1109/tcpmt.2018.2859031.

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Kenaan, Mohamad, Mihaela G. Moisescu, Tudor Savopol, Diana Martin, Delia Arnaud-Cormos, and Philippe Leveque. "Dosimetry of an in vitro exposure system for fluorescence measurements during 2.45 GHz microwave exposure." International Journal of Microwave and Wireless Technologies 3, no. 1 (November 25, 2010): 81–86. http://dx.doi.org/10.1017/s1759078710000784.

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An in vitro system for 2.45 GHz microwave (MW) exposure with real-time fluorescence measurements is proposed. This system is specifically designed for the measurement of those biophysical parameters of living cells or membrane models which can be quantified by spectrofluorometric methods (e.g. membrane generalized polarization (GP), membrane fluidity, membrane potential, etc.). The novelty of the system consists in the possibility to perform fluorescence measurements on the biological samples simultaneously with their exposure to MW. The MW applicator is an open ended coaxial antenna which is dipped into a cuvette. The distribution of electromagnetic field and specific absorption rate (SAR) in the cuvette are provided from a rigorous electromagnetic numerical analysis performed with a finite difference-time domain (FDTD) based tool. With this system, fluorescence measurements were used to calculate the membrane GP values of giant unilamellar vesicle suspensions that were acquired during exposure to a 1.2 W incident power. For this power, the SAR distribution and mean SAR value for the whole volume were calculated based on temperature measurements made at different positions inside the cuvette.
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Mishra, Naveen, Dilip Kumar Choudhary, and Raghvendra Kumar Chaudhary. "Miniaturized open-ended dual-band band-pass filter with series stepped capacitance and shunt meandered line inductance for microwave frequency applications." International Journal of Microwave and Wireless Technologies 11, no. 3 (January 10, 2019): 237–43. http://dx.doi.org/10.1017/s1759078718001629.

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AbstractIn this paper, a miniaturized open-ended dual-band band-pass filter with stepped series capacitance and shunt meandered line inductance for microwave frequency applications has been designed and discussed. In order to offer ease of fabrication and uniplanar configuration, coplanar waveguide feeding arrangement has been used. Zeroth order resonance, a special phenomenon of composite right/left handed transmission line has been utilized to miniaturize the filter size. The designed filter structure offers miniaturization with overall footprint size of 0.26λg × 0.19λg, where λg is the guided wavelength at the center frequency of 1.46 GHz. It offers 58.90% (1.03–1.89 GHz) and 25.93% (2.55–3.31 GHz) measured −3 dB fractional bandwidth with respect to the center frequencies of 1.46 and 2.93 GHz, respectively. Dispersion plot has been utilized to discuss the metamaterial properties for the proposed dual-band band-pass filter. In addition to above, the proposed filter structure presents almost flat group delay curve within both passbands. The proposed filter structure can be suitably utilized for distinct wireless applications, for example global navigation satellite system (1.559–1.610 GHz), GSM1800 (1.7–1.8 GHz), Wi-MAX (2.5–2.7 GHz), and naval radar and air traffic control (2.7–2.9 GHz).
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Liu, Chenhui, Libo Zhang, Jinhui Peng, Wenwen Qu, Bingguo Liu, Hongying Xia, and Junwen Zhou. "Dielectric Properties and Microwave Heating Characteristics of Sodium Chloride at 2.45 GHz." High Temperature Materials and Processes 32, no. 6 (December 1, 2013): 587–96. http://dx.doi.org/10.1515/htmp-2013-0008.

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AbstractThe effects of moisture content and temperature on the dielectric property of sodium chloride were investigated by using open-ended senor dielectric measurement system at the frequency of 2.45 GHz. Moisture content is a major influencing factor in the variation of dielectric properties. Dielectric constant, loss factor and loss tangent all increase linearly with moisture content increasing. Three predictive models were developed to obtain dielectric constant, loss factor, loss tangent and of sodium chloride as linear functions of moisture content. Temperature between 20 °C and 100 °C has a positive effect on dielectric constant and loss factor. Penetration depth decreased nonlinearly with moisture and temperature increasing. A predictive model was developed to calculate penetration depth for sodium chloride as a fifth function of moisture content. In addition, the measurements indicate that the particles temperature increases linearly with microwaving heating time at different power levels. The knowledge gained from these results is useful in developing more effective applications of microwave drying and designing better sensors for measuring moisture content of sodium chloride.
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Sadou, Hakim, Tarik Hacib, Hulusi Acikgoz, Yann Le-Bihan, Olivier Meyer, and Mohamed Rachid Mekideche. "An approach based on ANFIS and input selection procedure for microwave characterization of dielectric materials." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 2 (March 5, 2018): 799–813. http://dx.doi.org/10.1108/compel-05-2017-0208.

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PurposeThe principle of microwave characterization of dielectric materials using open-ended coaxial line probe is to link the dielectric properties of the sample under test to the measurements of the probe admittance (Y(f) = G(f)+ jB(f )). The purpose of this paper is to develop an alternative inversion tool able to predict the evolution of the complex permittivity (ε = ε′ – jε″) on a broad band frequency (f from 1 MHz to 1.8 GHz). Design/methodology/approachThe inverse problem is solved using adaptive network based fuzzy inference system (ANFIS) which needs the creation of a database for its learning. Unfortunately, train ANFIS using f, G and B as inputs has given unsatisfying results. Therefore, an inputs selection procedure is used to select the three optimal inputs from new inputs, created mathematically from original ones, using the Jang method. FindingsInversion results of measurements give, after training, in real time the complex permittivity of solid and liquid samples with a very good accuracy which prove the applicability of ANFIS to solve inverse problems in microwave characterization. Originality/valueThe originality of this paper consists on the use of ANFIS with input selection procedure based on the Jang method to solve the inverse problem where the three optimal inputs are selected from 26 new inputs created mathematically from original ones (f, G and B).
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Tan, Shin Yee, Muhammad Firdaus Akbar, Nawaf H. M. M. Shrifan, Ghassan Nihad Jawad, and Mohd Nadhir Ab Wahab. "Assessment of Defects under Insulation Using K-Medoids Clustering Algorithm-Based Microwave Nondestructive Testing." Coatings 12, no. 10 (September 30, 2022): 1440. http://dx.doi.org/10.3390/coatings12101440.

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Composite insulations, such as ceramics, are commonly utilized in the turbine system as a thermal coating barrier to protect the metal substrate against high temperatures and pressure. The presence of delamination in the composite insulations may cause turbine failure, leading to a catastrophic accident. Thus, regular non-destructive testing is required to detect and evaluate insulation defects. Among the non-destructive testing techniques, the microwave technique has emerged as a promising method for assessing defects in ceramic coatings. Although the method is promising, microwave non-destructive testing suffers from poor spatial imaging, making the defect assessment challenging. In this paper, a novel technique based on microwave non-destructive testing with a k-medoids clustering algorithm for delamination detection is proposed. The representative ceramic coating sample is scanned using a Q-band open-ended rectangular waveguide with 101 frequency points that operated between 33 to 50 GHz. The measured data is transformed from the frequency domain to the time domain using an inverse fast Fourier transform. The principal component analysis is then used to reduce the dimensionality of 101 time steps into only 3 dominant attributes. The attributes of each inspected location are classified as defect or defect-free using the k-medoids clustering algorithm for accurately detecting and sizing the defects in the ceramic insulation. The results reported in this paper highlight the superiority of the k-medoids clustering algorithm in delamination detection, with an accuracy rate of 95.4%. This is a significant step forward compared to earlier approaches for identifying ceramic defects.
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Ren, Wang, Shu-Wei Hu, and Chen Jiang. "An ACS-fed F-shaped monopole antenna for GPS/WLAN/WiMAX applications." International Journal of Microwave and Wireless Technologies 9, no. 5 (October 24, 2016): 1123–29. http://dx.doi.org/10.1017/s1759078716001173.

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In this paper, an asymmetric coplanar strip (ACS)-fed quad-band monopole antenna for the global positioning system (GPS), wireless local area network (WLAN), and worldwide interoperability for microwave access (WiMAX) applications is proposed. It is composed of an F-shaped monopole and a partial ground plane, which are both printed on one side of a low-cost FR4 substrate with a compact volume of 40 × 20 × 1.6 mm3. By cutting an open-ended Γ-shaped slot into the F-shaped monopole, four distinct resonant modes are successfully generated. The design process, especially the geometrical configuration of the critical Γ-shaped slot is studied in detail. The proposed antenna has been fabricated and experimental results show that the −10 dB impedance bandwidth can fully cover the 1.575-GHz GPS (1.57–1.59 GHz), 2.4/5.2/5.8-GHz WLAN (2.4–2.485, 5.15–5.35, and 5.725–5.825 GHz), and 2.5/3.5/5.5-GHz WiMAX (2.50–2.69, 3.30–3.70, and 5.25–5.85 GHz) applications with nearly omni-directional radiation patterns and satisfactory gains.
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Mirzavand, Rashid, Mohammad Honari, Bahareh Laribi, Behnam Khorshidi, Mohtada Sadrzadeh, and Pedram Mousavi. "An Unpowered Sensor Node for Real-Time Water Quality Assessment (Humic Acid Detection)." Electronics 7, no. 10 (October 3, 2018): 231. http://dx.doi.org/10.3390/electronics7100231.

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A zero-power microwave sensor is reported for the real-time assessment of water quality. The proposed structure is able to transmit sensed data directly to a base-station without additional data processing at the wireless sensor node (WSN) which results in less power consumption. The base-station propagates a single tone signal at the frequency of f0/2. At the sensing node, an antenna absorbs that signal and a passive frequency doubler makes its frequency twice, i.e., f0, which will be used as the carrier signal. Two pairs of open-ended coaxial probes are used as liquid sensors; one inside a known reference sample and the other one inside the water under test. A combination of both sensors’ data will be sent to the base-station. A special six-port structure is used for modulation of sensed data over the carrier. At the base-station, a receiver will demodulate the received signal for extracting the sensed data. As an example, the system has been evaluated at f0 = 2.45 GHz for the detection of Humic-Acid levels as a common contaminant of river waters.
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Gimeno, B., M. Guglielmi, N. Chouaib, J. M. Catala-Civera, V. E. Boria, and P. Soto. "Analysis, design, and experimental verification of microwave filters for safety issues in open-ended waveguide systems." IEEE Transactions on Microwave Theory and Techniques 48, no. 11 (2000): 2133–40. http://dx.doi.org/10.1109/22.884205.

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Book chapters on the topic "Open-ended microwave system"

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Sutthaweekul, Ruslee, and Gui Yun Tian. "Fast Localization of Impact Damage on Woven CFRP Based on Sparse Microwave Imaging." In Studies in Applied Electromagnetics and Mechanics. IOS Press, 2020. http://dx.doi.org/10.3233/saem200035.

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Microwave open-ended waveguide scanning has been proved to be a promising NDT technique for imaging of woven carbon fiber reinforced plastic (CFRP) with impact damages. However, it uses a conventional C-scan technique, which is excessively time-consuming and therefore it is not practical for defect detection in a large area. Moreover, without proper feature extraction, the appearance of woven texture within the impact damage area opposes to the localization of the impact. This work proposes a novel framework for fast impact damage localization by means of discrete sparse measurement. Also, the localization accuracy of sparse measurement is improved by mitigating effect of woven texture using principal component analysis (PCA) for feature extraction. The performance of the proposed methods is evaluated by sets of incremental measurements. The performance of the proposed system is and evaluated by localizing the impact damage of 100 non-uniform sparse sampling sequences. Results show that our proposed technique can accurately localize the impact damage with number of samples less than 10% of full measurements, giving approximately 10 times faster than that of the conventional C-scan.
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Conference papers on the topic "Open-ended microwave system"

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Pavuluri, S. K., M. Ferenets, G. Goussetis, M. P. Y. Desmulliez, T. Tilford, R. Adamietz, G. Muller, F. Eicher, and C. Bailey. "Experimental investigation of open-ended microwave oven assisted encapsulation process." In 2010 3rd Electronic System-Integration Technology Conference (ESTC). IEEE, 2010. http://dx.doi.org/10.1109/estc.2010.5643015.

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Suga, R., H. Nakano, Y. Hirachi, J. Hirokawa, and M. Ando. "Cost-effective 60-GHz antenna-package with end-fire radiation from open-ended post-wall waveguide for wireless file-transfer system." In 2010 IEEE/MTT-S International Microwave Symposium - MTT 2010. IEEE, 2010. http://dx.doi.org/10.1109/mwsym.2010.5517330.

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Suga, Ryosuke, Hiroshi Nakano, Yasutake Hirachi, Jiro Hirokawa, and Makoto Ando. "Cost-effective 60-GHz antenna-package with end-fire radiation from open-ended post-wall waveguide for wireless file-transfer system." In 2010 IEEE/MTT-S International Microwave Symposium - MTT 2010. IEEE, 2010. http://dx.doi.org/10.1109/mwsym.2010.5518210.

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Ramzi, Mohammad R., Iman Prayudi, Mohamad A. R. Wahbah, and Mohamed A. Abou-Khousa. "Near-field microwave imaging using open-ended circular waveguides." In 2016 IEEE International Conference on Imaging Systems and Techniques (IST). IEEE, 2016. http://dx.doi.org/10.1109/ist.2016.7738216.

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Shafi, K. T. Muhammed, Mohammed Saif ur Rahman, Mohamed A. Abou-Khousa, and Mohammad Riad Ramzi. "Applied microwave imaging of composite structures using open-ended circular waveguide." In 2017 IEEE International Conference on Imaging Systems and Techniques (IST). IEEE, 2017. http://dx.doi.org/10.1109/ist.2017.8261531.

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