Pub Date : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704547
N. Anselmi, P. Rocca, B. Biscontini, A. M. Barrera, A. Massa
This work presents a novel methodology for the design of base stations antenna arrays for multi-user MIMO communications. The array has a simplified and modular architecture, composed by few sub-array tiles shapes, reducing the array control points. By combining a pre-coding technique for the setting of the excitations weights with an exhaustive search of exact tiling solutions, the communication channel capacity is maximized. The presented preliminary result shows that the optimized irregular tiling layout allows to reach higher capacity values with respect to a regular tiling configuration.
{"title":"Capacity-Driven Optimization of Tiled Arrays for Multi-User MIMO Communication Base Stations","authors":"N. Anselmi, P. Rocca, B. Biscontini, A. M. Barrera, A. Massa","doi":"10.1109/APS/URSI47566.2021.9704547","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704547","url":null,"abstract":"This work presents a novel methodology for the design of base stations antenna arrays for multi-user MIMO communications. The array has a simplified and modular architecture, composed by few sub-array tiles shapes, reducing the array control points. By combining a pre-coding technique for the setting of the excitations weights with an exhaustive search of exact tiling solutions, the communication channel capacity is maximized. The presented preliminary result shows that the optimized irregular tiling layout allows to reach higher capacity values with respect to a regular tiling configuration.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"32 1","pages":"799-800"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87953697","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704670
Young Joo Kim, D. Seo, D. Ahn, Won‐Sang Yoon, Sang‐Min Han
A defected ground structure (DGS) lowpass filter is designed on a double-layered substrate. By increasing the effective dielectric constant on a DGS plane, the DGS pattern can be minimized. An equivalent circuit model is presented and circuit elements are extract to design the lowpass filter. The simulated, modeled, and experimental results have been well matched to the new design method.
{"title":"Miniatured LPF Design on a Double-Layered Defected Ground Structure","authors":"Young Joo Kim, D. Seo, D. Ahn, Won‐Sang Yoon, Sang‐Min Han","doi":"10.1109/APS/URSI47566.2021.9704670","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704670","url":null,"abstract":"A defected ground structure (DGS) lowpass filter is designed on a double-layered substrate. By increasing the effective dielectric constant on a DGS plane, the DGS pattern can be minimized. An equivalent circuit model is presented and circuit elements are extract to design the lowpass filter. The simulated, modeled, and experimental results have been well matched to the new design method.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"80 4 1","pages":"1087-1088"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87982550","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704516
V. Chandrasegar, Gyu-Il Park, J. Koh
Time Delay Estimation (TDE) has been studied for a long time in the field of signal processing, sonar, radar, seismic waves, and radio waves. This paper uses the Matrix Pencil Method to restore super-resolution Time Delay Estimation (TDE) of signals in multi-path settings (MPM). To validate the proposed algorithm, errors were measured and compared to the traditional Multiple Signal Classification (MUSIC) and cross-correlation methods. TDE uses cross-correlation to develop calculations based on a single model called the optimal environment, but the accuracy of measurements continues to deteriorate as two or three signals are gradually entered at times shorter than the time period, necessitating super-resolution accurate time delay calculations such as MPM and MUSIC. Through correctly identifying and quantifying all components to their resolution limits and solving closely spaced frequencies, the proposed super-resolution MPM algorithm outperforms conventional approaches.
{"title":"A Super Resolution Algorithms for Time Delay Measurement","authors":"V. Chandrasegar, Gyu-Il Park, J. Koh","doi":"10.1109/APS/URSI47566.2021.9704516","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704516","url":null,"abstract":"Time Delay Estimation (TDE) has been studied for a long time in the field of signal processing, sonar, radar, seismic waves, and radio waves. This paper uses the Matrix Pencil Method to restore super-resolution Time Delay Estimation (TDE) of signals in multi-path settings (MPM). To validate the proposed algorithm, errors were measured and compared to the traditional Multiple Signal Classification (MUSIC) and cross-correlation methods. TDE uses cross-correlation to develop calculations based on a single model called the optimal environment, but the accuracy of measurements continues to deteriorate as two or three signals are gradually entered at times shorter than the time period, necessitating super-resolution accurate time delay calculations such as MPM and MUSIC. Through correctly identifying and quantifying all components to their resolution limits and solving closely spaced frequencies, the proposed super-resolution MPM algorithm outperforms conventional approaches.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"16 1","pages":"1137-1138"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88124693","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704420
Zhihao Zhu, Yaowei Hou, Yue Ping Zhang
This paper presents a compact differential quasi-Yagi antenna with broadband and uniplanar characteristics. An impedance transformer is designed combining a section of tapered coupled microstrip lines (TCML) and a section of coplanar strips (CPS). The proposed antenna exhibits a −10 dB differential-mode (DM) return loss bandwidth of 54.1% (7.95 to 13.85 GHz) with efficiency of around 94%. The front-to-back ratio is better than 9.1 dB while the cross-polarization is less than −20 dB. Besides, simulated results demonstrate that the maximum common-mode (CM) rejection is 0.6 dB and the gain is from 3.4 dBi to 5.5 dBi within the operating bandwidth.
{"title":"A Compact Differential Quasi-Yagi Antenna With Broadband and Uniplanar Characteristics","authors":"Zhihao Zhu, Yaowei Hou, Yue Ping Zhang","doi":"10.1109/APS/URSI47566.2021.9704420","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704420","url":null,"abstract":"This paper presents a compact differential quasi-Yagi antenna with broadband and uniplanar characteristics. An impedance transformer is designed combining a section of tapered coupled microstrip lines (TCML) and a section of coplanar strips (CPS). The proposed antenna exhibits a −10 dB differential-mode (DM) return loss bandwidth of 54.1% (7.95 to 13.85 GHz) with efficiency of around 94%. The front-to-back ratio is better than 9.1 dB while the cross-polarization is less than −20 dB. Besides, simulated results demonstrate that the maximum common-mode (CM) rejection is 0.6 dB and the gain is from 3.4 dBi to 5.5 dBi within the operating bandwidth.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"172 1","pages":"69-70"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88206982","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9703843
Ma Boyuan, Jin Pan
The effective dielectric constant (EDC) theory for stacked rectangular dielectric resonator antennas (DRAs) is investigated. First, the classical static capacitance models (SCMs) are revisited. It is found that these models might have been abused, e.g., controversial models were applied in similar structures. Accordingly, the accuracy of these EDC methods is questionable though they are widely used. To solve this problem, numerical experiments are conducted for validation. Novel homogenization methods are then introduced based on the effective medium theory as improvements. All the above methods are compared through a set of DRA samples where the resonant mode and stacking order are taken into account. The practicability of each method is then discussed based on error analysis. It is found that the effective medium theory outperforms the prevalent SCMs.
{"title":"Study on Homogenization Methods of Stacked Rectangular Dielectric Resonator Antennas","authors":"Ma Boyuan, Jin Pan","doi":"10.1109/APS/URSI47566.2021.9703843","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9703843","url":null,"abstract":"The effective dielectric constant (EDC) theory for stacked rectangular dielectric resonator antennas (DRAs) is investigated. First, the classical static capacitance models (SCMs) are revisited. It is found that these models might have been abused, e.g., controversial models were applied in similar structures. Accordingly, the accuracy of these EDC methods is questionable though they are widely used. To solve this problem, numerical experiments are conducted for validation. Novel homogenization methods are then introduced based on the effective medium theory as improvements. All the above methods are compared through a set of DRA samples where the resonant mode and stacking order are taken into account. The practicability of each method is then discussed based on error analysis. It is found that the effective medium theory outperforms the prevalent SCMs.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"8 1","pages":"1163-1164"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86082055","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704629
Aritra Roy, K. J. Vinoy, N. Martin, C. Quendo, S. Mallégol
A hybrid technique of using an electromagnetic (EM) absorbing material and a set of resistors are proposed to improve the low frequency matching and axial ratio of an Archimedean spiral antenna for $2-18 GHz$. A cavity of depth 5 mm is maintained to make the structure extremely compact. Simulations are performed to analyze the effects of these approaches separately. A Wideband matching and polarization purity are observed over the entire frequency range with a maximum right-hand circular (RH) gain of 8.2 dBiC.
{"title":"Performance Enhancement of A Compact Archimedean Spiral Antenna for 2-18 GHz","authors":"Aritra Roy, K. J. Vinoy, N. Martin, C. Quendo, S. Mallégol","doi":"10.1109/APS/URSI47566.2021.9704629","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704629","url":null,"abstract":"A hybrid technique of using an electromagnetic (EM) absorbing material and a set of resistors are proposed to improve the low frequency matching and axial ratio of an Archimedean spiral antenna for $2-18 GHz$. A cavity of depth 5 mm is maintained to make the structure extremely compact. Simulations are performed to analyze the effects of these approaches separately. A Wideband matching and polarization purity are observed over the entire frequency range with a maximum right-hand circular (RH) gain of 8.2 dBiC.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"1 1","pages":"289-290"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86208011","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704452
Kazuki Yukawa, T. Matsumuro, T. Ishizaki, Y. Ishikawa
This study proposes a small model experiment of microwave power transmission using the parallel plate waveguide. In the parallel plate waveguide, the electromagnetic wave can be regarded as two-dimensional. Therefore, we derived a two-dimensional theoretical equation by analogy with the Friis transmission formula. According to the theoretical equation, the electromagnetic wave attenuates in inverse proportion to the distance. The electromagnetic field simulation results were found to be close to the theoretical equations.
{"title":"Basic Study on Two-Dimensional Beam Propagation Characteristics in Parallel Plate Waveguide","authors":"Kazuki Yukawa, T. Matsumuro, T. Ishizaki, Y. Ishikawa","doi":"10.1109/APS/URSI47566.2021.9704452","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704452","url":null,"abstract":"This study proposes a small model experiment of microwave power transmission using the parallel plate waveguide. In the parallel plate waveguide, the electromagnetic wave can be regarded as two-dimensional. Therefore, we derived a two-dimensional theoretical equation by analogy with the Friis transmission formula. According to the theoretical equation, the electromagnetic wave attenuates in inverse proportion to the distance. The electromagnetic field simulation results were found to be close to the theoretical equations.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"2015 1","pages":"35-36"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86215152","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9703909
Christopher D. Phillips, V. Okhmatovski
We present some of the fundamental methods in quantum computing for matrix equations, framed in terms of their applicability to solution of integral equations in electromagnetics. In particular, we describe the HHL algorithm for matrix inversion and matrix vector products, as well as techniques of Hamiltonian simulation for general matrices.
{"title":"Towards Solution of Integral Equations in Electromagnetics on Quantum Computers","authors":"Christopher D. Phillips, V. Okhmatovski","doi":"10.1109/APS/URSI47566.2021.9703909","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9703909","url":null,"abstract":"We present some of the fundamental methods in quantum computing for matrix equations, framed in terms of their applicability to solution of integral equations in electromagnetics. In particular, we describe the HHL algorithm for matrix inversion and matrix vector products, as well as techniques of Hamiltonian simulation for general matrices.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"2011 1","pages":"1805-1806"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86349222","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704194
A. Monti, M. Barbuto, C. Massagrande, S. Vellucci, A. Marini, D. Ramaccia, A. Toscano, F. Bilotti
In this contribution, we propose a quadratic-gradient metasurface dome operating in the near-field region of a dual-polarized phased array able enhancing its grating-lobe-free scanning range without affecting its other characteristics. The dome consists of an array of Huygens unit-cells exhibiting an extremely low insertion loss and a proper phase shift in transmission. The main characteristic of the proposed dome is the quadratic-gradient phase profile, which minimizes the beam divergence in broadside direction, whereas linearly increases the scanning region in off-broadside pointing angles. A proper set of numerical simulations have been performed showing the capability of the proposed dome to enhance the grating lobe free scanning region from −58° to −83°.
{"title":"Enhancing the Beam Scanning Capability of Phased Arrays Using Quadratic-Gradient Metasurface Dome","authors":"A. Monti, M. Barbuto, C. Massagrande, S. Vellucci, A. Marini, D. Ramaccia, A. Toscano, F. Bilotti","doi":"10.1109/APS/URSI47566.2021.9704194","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704194","url":null,"abstract":"In this contribution, we propose a quadratic-gradient metasurface dome operating in the near-field region of a dual-polarized phased array able enhancing its grating-lobe-free scanning range without affecting its other characteristics. The dome consists of an array of Huygens unit-cells exhibiting an extremely low insertion loss and a proper phase shift in transmission. The main characteristic of the proposed dome is the quadratic-gradient phase profile, which minimizes the beam divergence in broadside direction, whereas linearly increases the scanning region in off-broadside pointing angles. A proper set of numerical simulations have been performed showing the capability of the proposed dome to enhance the grating lobe free scanning region from −58° to −83°.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"128 1","pages":"333-334"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82905946","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704619
Peng Jiang, Wen Jiang, S. Gong
A Vivaldi antenna array with low in-band radar cross section (RCS) and low cross-polarization properties is proposed in this paper. The proposed antenna array consists of 4 $times 4$ Vivaldi antennas and an orthogonally oriented spoof surface plasmon polariton (SSPP) absorber. Since the electromagnetic waves whose polarization direction is parallel to the SSPP absorber can be absorbed, the in-band cross-polarization RCS and the cross-polarization level of the antenna array can be reduced. The antenna array works in the frequency band of 3.7-15.0 GHz. Compared with the antenna array without SSPP absorber, the proposed antenna array can achieve a 10-dB RCS reduction from 6.2 to 13.5 GHz and a 10-dB in-band cross-polarization reduction from 6.2 to 11.5 GHz, while the radiation performance of co-polarization remains unchanged.
{"title":"Vivaldi Array Antenna With Low In-band RCS and Low Cross-polarization Properties by Loading Spoof Surface Plasmon Polariton Absorber","authors":"Peng Jiang, Wen Jiang, S. Gong","doi":"10.1109/APS/URSI47566.2021.9704619","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704619","url":null,"abstract":"A Vivaldi antenna array with low in-band radar cross section (RCS) and low cross-polarization properties is proposed in this paper. The proposed antenna array consists of 4 $times 4$ Vivaldi antennas and an orthogonally oriented spoof surface plasmon polariton (SSPP) absorber. Since the electromagnetic waves whose polarization direction is parallel to the SSPP absorber can be absorbed, the in-band cross-polarization RCS and the cross-polarization level of the antenna array can be reduced. The antenna array works in the frequency band of 3.7-15.0 GHz. Compared with the antenna array without SSPP absorber, the proposed antenna array can achieve a 10-dB RCS reduction from 6.2 to 13.5 GHz and a 10-dB in-band cross-polarization reduction from 6.2 to 11.5 GHz, while the radiation performance of co-polarization remains unchanged.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"6 1","pages":"1323-1324"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86611509","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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