Pub Date : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886543
R. Buehrer, S. Ellingson
In prior work, we demonstrated sidelobe nulling for a reflector antenna system by electronic modification of the phase of scattering from elements located near the rim of the reflector. Applications for such a system include radio astronomy, where deleterious levels of interference from satellites enter through sidelobes. However the prior work was limited to placing single nulls with no constraint on main lobe characteristics, leading to gain which varies as a function of null direction. In this work, we consider simulated annealing as a means of placing nulls simultaneously with enforcement of a gain constraint. Using this method, deep nulls are possible even when element control is limited to discrete binary (i.e., 1-bit) phase-only control.
{"title":"Pattern Control for Reflector Antennas Using Electronically-Reconfigurable Rim Scattering","authors":"R. Buehrer, S. Ellingson","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886543","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886543","url":null,"abstract":"In prior work, we demonstrated sidelobe nulling for a reflector antenna system by electronic modification of the phase of scattering from elements located near the rim of the reflector. Applications for such a system include radio astronomy, where deleterious levels of interference from satellites enter through sidelobes. However the prior work was limited to placing single nulls with no constraint on main lobe characteristics, leading to gain which varies as a function of null direction. In this work, we consider simulated annealing as a means of placing nulls simultaneously with enforcement of a gain constraint. Using this method, deep nulls are possible even when element control is limited to discrete binary (i.e., 1-bit) phase-only control.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115224313","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 : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886811
Xinrui Liu, Fan Zhang, P. Kapitanova, Mingzhao Song
The charging platforms capable of powering multi-receivers have attracted much interest in wireless power transfer realm. In this paper, we propose a metasurface-inspired resonator which generates uniform magnetic fields in the central working area of 30 cm × 30 cm. The maximum available power transfer efficiency of this area also reaches more than 90% suitable for charging a single receiver or multiple receivers in an office table.
能够为多接收器供电的充电平台已经引起了无线电力传输领域的广泛关注。在本文中，我们提出了一种超表面激发谐振器，它在30 cm × 30 cm的中心工作区域产生均匀磁场。该区域的最大可用功率传输效率也达到90%以上，适合为办公桌上的单个接收器或多个接收器充电。
{"title":"Uniform Near Magnetic Field Generated by Metasurface for Wireless Power Transfer","authors":"Xinrui Liu, Fan Zhang, P. Kapitanova, Mingzhao Song","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886811","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886811","url":null,"abstract":"The charging platforms capable of powering multi-receivers have attracted much interest in wireless power transfer realm. In this paper, we propose a metasurface-inspired resonator which generates uniform magnetic fields in the central working area of 30 cm × 30 cm. The maximum available power transfer efficiency of this area also reaches more than 90% suitable for charging a single receiver or multiple receivers in an office table.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115332164","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 : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886047
B. Chowdhury, A. Eroglu
A method to enhance gain and directivity of multiband microstrip antenna is proposed using periodic metasurface on the ground plane. The closed form relations are derived and verified via 3D electromagnetic simulation. The antenna performance has been studied by changing periodic metasurface structure using SRRs on the ground plane. It has been shown that the proposed method enhances the gain and directivity of the multiband antenna structure. It is also observed that the periodic metasurface structure can be used as a knob to adjust the bandwidth of the antenna at the frequency of interest.
{"title":"Gain and Directivity Enhancement for Multiband Metasurface Antennas for 5G Applications","authors":"B. Chowdhury, A. Eroglu","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886047","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886047","url":null,"abstract":"A method to enhance gain and directivity of multiband microstrip antenna is proposed using periodic metasurface on the ground plane. The closed form relations are derived and verified via 3D electromagnetic simulation. The antenna performance has been studied by changing periodic metasurface structure using SRRs on the ground plane. It has been shown that the proposed method enhances the gain and directivity of the multiband antenna structure. It is also observed that the periodic metasurface structure can be used as a knob to adjust the bandwidth of the antenna at the frequency of interest.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115410157","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 : 2022-07-10DOI: 10.1109/ap-s/usnc-ursi47032.2022.9886039
Y. Rahmat-Samii
It is an honor to present this invited talk in the special session of the IEEE-APS-URSI Symposium dedicated to the scientific life of late Prof. Tapan Sarkar (1948-2021). I knew Tapan for nearly five decades and had many fruitful discussions with him on all kinds of EM topics including rapid evaluation of the Sommerfeld Half-Space Integral, Integral Equations, and MoM, Near Field Measurement Techniques, etc. What I vividly remember was his keen interest to constantly explore out-of-the-box solutions in dealing with advanced numerical techniques and their practical implementations for solving antennas and scattering problems. Ironically we shared some similar experiences by participating in enormous numbers of national and international conferences and presenting papers in the same sessions and contributing to many committee meetings together and the list goes on and on. We not only lost an exceptional researcher but also a dear friend.
{"title":"Remembering Prof. Tapan Sarkar: A Wonderful Colleague and a Dear Friend","authors":"Y. Rahmat-Samii","doi":"10.1109/ap-s/usnc-ursi47032.2022.9886039","DOIUrl":"https://doi.org/10.1109/ap-s/usnc-ursi47032.2022.9886039","url":null,"abstract":"It is an honor to present this invited talk in the special session of the IEEE-APS-URSI Symposium dedicated to the scientific life of late Prof. Tapan Sarkar (1948-2021). I knew Tapan for nearly five decades and had many fruitful discussions with him on all kinds of EM topics including rapid evaluation of the Sommerfeld Half-Space Integral, Integral Equations, and MoM, Near Field Measurement Techniques, etc. What I vividly remember was his keen interest to constantly explore out-of-the-box solutions in dealing with advanced numerical techniques and their practical implementations for solving antennas and scattering problems. Ironically we shared some similar experiences by participating in enormous numbers of national and international conferences and presenting papers in the same sessions and contributing to many committee meetings together and the list goes on and on. We not only lost an exceptional researcher but also a dear friend.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115769412","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 : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886927
Jayesh B. Gohel, Ziqi Liu, P. Mojabi
For the design of compact metasurface pairs using an existing design approach, a conjugate gradient (CG) algorithm with analytical expressions for the CG direction, step length, and the initial guess is developed. This is done in an attempt to fully automate this design approach.
{"title":"A Conjugate Gradient Algorithm with Analytical Expressions for Compact Metasurface Pair Design","authors":"Jayesh B. Gohel, Ziqi Liu, P. Mojabi","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886927","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886927","url":null,"abstract":"For the design of compact metasurface pairs using an existing design approach, a conjugate gradient (CG) algorithm with analytical expressions for the CG direction, step length, and the initial guess is developed. This is done in an attempt to fully automate this design approach.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115778974","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 : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886690
S. Shukla, Kapil Saraswat, A. Harish
This paper reviews the applications of different structures of knots in terms of their unique radiation properties. The various knots as a radiating structure discussed in this paper are classified in terms of a monopole antenna, linearly polarized unidirectional antenna, pattern diversity antenna, conical beam and broadside circularly polarized antennas.
{"title":"Knot as Antennas: A Brief Review","authors":"S. Shukla, Kapil Saraswat, A. Harish","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886690","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886690","url":null,"abstract":"This paper reviews the applications of different structures of knots in terms of their unique radiation properties. The various knots as a radiating structure discussed in this paper are classified in terms of a monopole antenna, linearly polarized unidirectional antenna, pattern diversity antenna, conical beam and broadside circularly polarized antennas.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115823704","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 : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886755
M. Rao, K. Sarabandi
This paper presents a very compact dual-polarized antenna array topology that allows for operation in the 26 GHz, 28 GHz, 37 GHz and 39 GHz bands designated for 5G uses. Four1 × 4 sub-arrays, namely low-band horizontally polarized (LB H-pol) array, high-band horizontally polarized (HB H-pol) array, low-band vertically polarized (LB V-pol) array and high-band vertically polarized (HB V-pol) array, are designed on a 12-layer laminate with total dimensions of 25 mm×6 mm×0.97 mm. The LB arrays achieve reflection coefficients of less than -10 dB from 24 – 30 GHz, and the HB arrays can operate from 37 – 43 GHz. Special techniques are used to reduce the mutual couplings between elements and enhance the array gain. Each sub-array features peak gain of more than 9.7 dBi at its center frequency. The 3-dB beam scanning ranges for the H-pol and V-pol arrays are ±45° and ±56° at 27 GHz, and ±42° and ±28° at 40 GHz, respectively.
{"title":"A Very Compact Dual-Polarized Antenna Array Topology Supporting Multiple 5G Bands","authors":"M. Rao, K. Sarabandi","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886755","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886755","url":null,"abstract":"This paper presents a very compact dual-polarized antenna array topology that allows for operation in the 26 GHz, 28 GHz, 37 GHz and 39 GHz bands designated for 5G uses. Four1 × 4 sub-arrays, namely low-band horizontally polarized (LB H-pol) array, high-band horizontally polarized (HB H-pol) array, low-band vertically polarized (LB V-pol) array and high-band vertically polarized (HB V-pol) array, are designed on a 12-layer laminate with total dimensions of 25 mm×6 mm×0.97 mm. The LB arrays achieve reflection coefficients of less than -10 dB from 24 – 30 GHz, and the HB arrays can operate from 37 – 43 GHz. Special techniques are used to reduce the mutual couplings between elements and enhance the array gain. Each sub-array features peak gain of more than 9.7 dBi at its center frequency. The 3-dB beam scanning ranges for the H-pol and V-pol arrays are ±45° and ±56° at 27 GHz, and ±42° and ±28° at 40 GHz, respectively.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124198058","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 : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886475
Gengyu Xu, S. Hum, G. Eleftheriades
We discuss a general framework for designing irregularly shaped passive and lossless conformal Huygens’ metasurfaces (HMS), derived from the theory of transformation optics. Through a conformal coordinate transformation, the physical space in which the HMS resides is mapped to a computational space, in which the surface geometry is significantly simpler. The mapping preserves the boundary conditions governing the field transformations, meaning any previously developed design methods for flat HMSs remain valid. Importantly, it also facilitates the identification of completely passive and lossless surface designs, which are usually sought-after for their ease of implementation.
{"title":"Passive and Lossless Conformal Huygens’ Metasurfaces for Arbitrary Wave Transformation","authors":"Gengyu Xu, S. Hum, G. Eleftheriades","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886475","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886475","url":null,"abstract":"We discuss a general framework for designing irregularly shaped passive and lossless conformal Huygens’ metasurfaces (HMS), derived from the theory of transformation optics. Through a conformal coordinate transformation, the physical space in which the HMS resides is mapped to a computational space, in which the surface geometry is significantly simpler. The mapping preserves the boundary conditions governing the field transformations, meaning any previously developed design methods for flat HMSs remain valid. Importantly, it also facilitates the identification of completely passive and lossless surface designs, which are usually sought-after for their ease of implementation.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124216996","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 : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9885813
Jori M. Platt, D. Filipović
A volumetric resonant structure is embedded inside an otherwise wideband (6–36 GHz) biconical antenna (bicone) to achieve band rejection within its wide instantaneous bandwidth. The parameters of this structure are chosen such a notch with a 3dB return loss is formed between 16.8 and 18.2 GHz. A parametric study is carried out to demonstrate the tunability of the band-reject region. A bicone is designed for fabrication with stereolithography followed by electroplating.
{"title":"Wideband Biconical Antenna with Embedded Band-Stop Resonator","authors":"Jori M. Platt, D. Filipović","doi":"10.1109/AP-S/USNC-URSI47032.2022.9885813","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9885813","url":null,"abstract":"A volumetric resonant structure is embedded inside an otherwise wideband (6–36 GHz) biconical antenna (bicone) to achieve band rejection within its wide instantaneous bandwidth. The parameters of this structure are chosen such a notch with a 3dB return loss is formed between 16.8 and 18.2 GHz. A parametric study is carried out to demonstrate the tunability of the band-reject region. A bicone is designed for fabrication with stereolithography followed by electroplating.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"296 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124277289","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 : 2022-07-10DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886185
Jinbo Liu, Xumeng Men, Jiming Song, Zengrui Li
In the solution of volume surface integral equation (VSIE) for composite objects, how to enforce the continuity condition (CC) of electric flux on the open perfect electric conductor (PEC)-dielectric interfaces to reduce volumetric unknowns is investigated. It is found that to correctly enforce the CC, the equivalent surface current on both faces of the PEC should be distinguished. For this purpose, the combined field integral equation (CFIE) is proposed to model the open PEC part. Numerical experiments show that compared with the traditional application of the CC, the proposed method gives more accurate results.
{"title":"Enforcing Continuity Condition on the Open PEC-Dielectric Interfaces for the Solution of Volume-Surface Integral Equation","authors":"Jinbo Liu, Xumeng Men, Jiming Song, Zengrui Li","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886185","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886185","url":null,"abstract":"In the solution of volume surface integral equation (VSIE) for composite objects, how to enforce the continuity condition (CC) of electric flux on the open perfect electric conductor (PEC)-dielectric interfaces to reduce volumetric unknowns is investigated. It is found that to correctly enforce the CC, the equivalent surface current on both faces of the PEC should be distinguished. For this purpose, the combined field integral equation (CFIE) is proposed to model the open PEC part. Numerical experiments show that compared with the traditional application of the CC, the proposed method gives more accurate results.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124327596","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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