Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329586
Jerika D. Cleveland, Jacob Lewis, D. Mitra, B. Braaten, Jeffery W. Allen, M. Allen
This work demonstrates a novel loading method for a printed microstrip transmission line using variable conductive particle manipulation controlled by magnetic fields. The conductive particle loading showed that the propagation characteristics of the transmission line could be changed, or tuned in the 2 GHz to 3 GHz band. The work presented in this paper is to provide an understanding of the particles' reaction to a measurable magnetic field density and the effect the particles have on the transmission lines propagation characteristics.
{"title":"On the Phase Shift of a Microstrip Transmission Line Loaded with Magneto-Responsive Conducting Micro-Particles","authors":"Jerika D. Cleveland, Jacob Lewis, D. Mitra, B. Braaten, Jeffery W. Allen, M. Allen","doi":"10.1109/IEEECONF35879.2020.9329586","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329586","url":null,"abstract":"This work demonstrates a novel loading method for a printed microstrip transmission line using variable conductive particle manipulation controlled by magnetic fields. The conductive particle loading showed that the propagation characteristics of the transmission line could be changed, or tuned in the 2 GHz to 3 GHz band. The work presented in this paper is to provide an understanding of the particles' reaction to a measurable magnetic field density and the effect the particles have on the transmission lines propagation characteristics.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114963880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330331
H. Saghlatoon, R. Mirzavand
Former students and colleagues of the late Professor Pedram Mousavi are still in shock and grief of his untimely and tragic death on flight PS752. May his soul rest in peace.
{"title":"Prof. Pedram Mousavi's Memorial","authors":"H. Saghlatoon, R. Mirzavand","doi":"10.1109/IEEECONF35879.2020.9330331","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330331","url":null,"abstract":"Former students and colleagues of the late Professor Pedram Mousavi are still in shock and grief of his untimely and tragic death on flight PS752. May his soul rest in peace.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115371396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329594
Goran Molnar, Mateja Babic, Z. Šipuš
Linear arrays forming pencil beams with slowly decaying sidelobes make a good trade-off among excitation dynamic range ratio, beam efficiency, directivity, sidelobe level, and beamwidth. Popular arrays with such sidelobe behavior are Taylor, Gauss, Gegenbauer, and second-kind Chebyshev. In this paper, we propose a closed-form method for the design of pencil-beam arrays with a prescribed sidelobe level. The method exploits the leastsquares approximation of a raised cosine function in the azimuth domain, thus bringing the beampattern with slowly decaying sidelobes. For common numbers of excitation coefficients and sidelobe levels, the proposed arrays simultaneously exhibit the optimum beamwidth, dynamic range ratio, and directivity.
{"title":"Closed-Form Design of Optimum Linear Arrays Based on Raised-Cosine Beampattern","authors":"Goran Molnar, Mateja Babic, Z. Šipuš","doi":"10.1109/IEEECONF35879.2020.9329594","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329594","url":null,"abstract":"Linear arrays forming pencil beams with slowly decaying sidelobes make a good trade-off among excitation dynamic range ratio, beam efficiency, directivity, sidelobe level, and beamwidth. Popular arrays with such sidelobe behavior are Taylor, Gauss, Gegenbauer, and second-kind Chebyshev. In this paper, we propose a closed-form method for the design of pencil-beam arrays with a prescribed sidelobe level. The method exploits the leastsquares approximation of a raised cosine function in the azimuth domain, thus bringing the beampattern with slowly decaying sidelobes. For common numbers of excitation coefficients and sidelobe levels, the proposed arrays simultaneously exhibit the optimum beamwidth, dynamic range ratio, and directivity.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115704129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330171
B. Hamdi, T. Aguili
This research paper presents a new modal method based on the Floquet analysis to study the coupled planar periodic antenna arrays applied in various recent wireless technologies, especially in massive MIMO, 5G millimeter waves and FMCW automotive radars. The considered idea used a known numerical method based on the moment technique simplified by equivalent circuits approach (MoM-GEC) to describe the electromagnetic responses in spectral (or Floquet) and spatial domains. A beamforming technique related to Fourier transformation is proposed when a far-field transformation algorithm for plane-rectangular scanning is highlighted to control the main radiation beam pattern in a particular direction toward a target, as given in various scanning scenarios. To demonstrate the efficiency of the given method, many simulation results are carried out using matlab. To validate this work several examples are shown.
{"title":"MoM-GEC combined with Floquet analysis to study scanned coupled almost periodic antenna arrays in massive MIMO for 5G generation and FMCW automotive radar applications","authors":"B. Hamdi, T. Aguili","doi":"10.1109/IEEECONF35879.2020.9330171","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330171","url":null,"abstract":"This research paper presents a new modal method based on the Floquet analysis to study the coupled planar periodic antenna arrays applied in various recent wireless technologies, especially in massive MIMO, 5G millimeter waves and FMCW automotive radars. The considered idea used a known numerical method based on the moment technique simplified by equivalent circuits approach (MoM-GEC) to describe the electromagnetic responses in spectral (or Floquet) and spatial domains. A beamforming technique related to Fourier transformation is proposed when a far-field transformation algorithm for plane-rectangular scanning is highlighted to control the main radiation beam pattern in a particular direction toward a target, as given in various scanning scenarios. To demonstrate the efficiency of the given method, many simulation results are carried out using matlab. To validate this work several examples are shown.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123144793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330021
Rachid El hani, A. Hajiaboli, S. Fortin, R. Moini, F. Dawalibi
A new integral formulation is introduced to compute the electromagnetic (EM) fields scattered by a vertically stratified half-space. The proposed approach is applied to lossless media illuminated by an electromagnetic plane wave. The computed results are compared with those obtained by the physical optics method.
{"title":"Scattering of Electromagnetic Plane Waves by a Vertically Stratified Two-Layer Medium","authors":"Rachid El hani, A. Hajiaboli, S. Fortin, R. Moini, F. Dawalibi","doi":"10.1109/IEEECONF35879.2020.9330021","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330021","url":null,"abstract":"A new integral formulation is introduced to compute the electromagnetic (EM) fields scattered by a vertically stratified half-space. The proposed approach is applied to lossless media illuminated by an electromagnetic plane wave. The computed results are compared with those obtained by the physical optics method.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124278464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329367
Yiran Cui, Murali Krishna Immadisetty, G. Trichopoulos
A simple numerical approach is presented to estimate rough surface scattering. We measure the roughness parameters of rough surfaces and then import them into a 2D model to compute the scattered fields under various surface illuminations. The validity of this approach is demonstrated by comparing the simulation results with measurements. Besides, we use the 2D model to simulate rough surfaces of a wide range of roughness parameters and perform a qualitative analysis on the scattering patterns. We show that, for most common building materials of moderate roughness, increasing the root-mean-square height of the rough surface reduces the maximum reflection and increases diffuse scattering. On the other hand, increasing the correlation length of the rough surface will lead to lower maximum reflection and diffuse scattering.
{"title":"Evaluating the Properties of Millimeter- and THz Wave Scattering from Common Rough Surfaces","authors":"Yiran Cui, Murali Krishna Immadisetty, G. Trichopoulos","doi":"10.1109/IEEECONF35879.2020.9329367","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329367","url":null,"abstract":"A simple numerical approach is presented to estimate rough surface scattering. We measure the roughness parameters of rough surfaces and then import them into a 2D model to compute the scattered fields under various surface illuminations. The validity of this approach is demonstrated by comparing the simulation results with measurements. Besides, we use the 2D model to simulate rough surfaces of a wide range of roughness parameters and perform a qualitative analysis on the scattering patterns. We show that, for most common building materials of moderate roughness, increasing the root-mean-square height of the rough surface reduces the maximum reflection and increases diffuse scattering. On the other hand, increasing the correlation length of the rough surface will lead to lower maximum reflection and diffuse scattering.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116763324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329552
Se-Young Kim, Wang‐Sang Lee
A near-field kandonian loop antenna with small loop array and opposite directional current (ODC) for using ultra high frequency (UHF) radio frequency identification (RFID) system is proposed. The proposed antenna is constructed by array four loop antennas smaller than the wavelength of the operating frequency. The proposed antenna expands the interrogation zone at near-field and has a uniform field distribution because each straight line at the top and bottom of the substrate in the small loop utilizes ODC to canceling current and form one large loop electrically. In addition, the proposed antenna has a lower E-field compared to the conventional single loop, which prevents detection of adjacent tags outside the interrogation zone. The proposed antenna has a maximum read range of 48 mm and the detailed characteristics of the proposed antenna are verified by comparing the simulation and measurement results.
{"title":"Near-Field Kandonian Loop Antenna With Wide Interrogation Zone for UHF RFID Applications","authors":"Se-Young Kim, Wang‐Sang Lee","doi":"10.1109/IEEECONF35879.2020.9329552","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329552","url":null,"abstract":"A near-field kandonian loop antenna with small loop array and opposite directional current (ODC) for using ultra high frequency (UHF) radio frequency identification (RFID) system is proposed. The proposed antenna is constructed by array four loop antennas smaller than the wavelength of the operating frequency. The proposed antenna expands the interrogation zone at near-field and has a uniform field distribution because each straight line at the top and bottom of the substrate in the small loop utilizes ODC to canceling current and form one large loop electrically. In addition, the proposed antenna has a lower E-field compared to the conventional single loop, which prevents detection of adjacent tags outside the interrogation zone. The proposed antenna has a maximum read range of 48 mm and the detailed characteristics of the proposed antenna are verified by comparing the simulation and measurement results.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117182186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An antenna which contains paired radiating arms is proposed in this paper. The antenna utilizes a coupling slot on a substrate integrated waveguide (SIW) transmission line for feeding the paired arms. On each radiating arm, a shorting-pin is loaded respectively. Measured results clear that the proposed antenna achieves an $S_{11}<-10$ bandwidth of 36.6-40.2 GHz and a gain of 7.9 dBi at 38GHz. And thus the antenna is a practical candidate for the fifth generation (5G) millimeter-wave (mmW) wireless applications.
{"title":"A SIW-based Antenna with Paired Radiating Arms for Q-Band Application","authors":"Pengfei Liu, Xiaowei Zhu, Ling Tian, Zhi Hao Jiang, Chao Yu","doi":"10.1109/IEEECONF35879.2020.9330308","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330308","url":null,"abstract":"An antenna which contains paired radiating arms is proposed in this paper. The antenna utilizes a coupling slot on a substrate integrated waveguide (SIW) transmission line for feeding the paired arms. On each radiating arm, a shorting-pin is loaded respectively. Measured results clear that the proposed antenna achieves an $S_{11}<-10$ bandwidth of 36.6-40.2 GHz and a gain of 7.9 dBi at 38GHz. And thus the antenna is a practical candidate for the fifth generation (5G) millimeter-wave (mmW) wireless applications.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117271216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330266
D. Olćan, J. Petrovic, B. Kolundžija
Machine learning is used to determine the polynomial regression of the coefficients of surface currents approximation for a curvilinear 2-D scatterer. The training data are obtained using method of moments with higher order basis functions and Galerkin testing procedure. The effect of polynomial regression order to the accuracy of calcualted radar cross-section is explored.
{"title":"Machine Learning for 2-D Scattering Analysis using Method of Moments","authors":"D. Olćan, J. Petrovic, B. Kolundžija","doi":"10.1109/IEEECONF35879.2020.9330266","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330266","url":null,"abstract":"Machine learning is used to determine the polynomial regression of the coefficients of surface currents approximation for a curvilinear 2-D scatterer. The training data are obtained using method of moments with higher order basis functions and Galerkin testing procedure. The effect of polynomial regression order to the accuracy of calcualted radar cross-section is explored.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117342654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329870
Serge R. Mghabghab, Anton Schlegel, Robert Gress, J. Nanzer
We demonstrate wireless frequency synchronization of separate wireless systems over a 90 m distance using a microwave system supporting joint frequency transfer and localization. Wireless frequency synchronization represents one of the basic coordination requirements in coherent distributed phased arrays. When combined with inter-node ranging, frequency synchronization enables separate nodes to implement distributed beamforming for various applications. We build on a novel spectrally-sparse two-tone ranging waveform combined with a self-mixing receiver circuit that demodulates a frequency reference from the two-tone separation and is used to synchronize the local oscillator. Measurements conducted outdoors demonstrate basic synchronization between two wireless systems, providing a framework for future distributed beamforming with widely separated nodes.
{"title":"Long-Range Wireless Frequency Synchronization for Distributed Phased Arrays","authors":"Serge R. Mghabghab, Anton Schlegel, Robert Gress, J. Nanzer","doi":"10.1109/IEEECONF35879.2020.9329870","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329870","url":null,"abstract":"We demonstrate wireless frequency synchronization of separate wireless systems over a 90 m distance using a microwave system supporting joint frequency transfer and localization. Wireless frequency synchronization represents one of the basic coordination requirements in coherent distributed phased arrays. When combined with inter-node ranging, frequency synchronization enables separate nodes to implement distributed beamforming for various applications. We build on a novel spectrally-sparse two-tone ranging waveform combined with a self-mixing receiver circuit that demodulates a frequency reference from the two-tone separation and is used to synchronize the local oscillator. Measurements conducted outdoors demonstrate basic synchronization between two wireless systems, providing a framework for future distributed beamforming with widely separated nodes.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121099857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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