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Radio science bulletin staff 无线电科学公告工作人员
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523798
{"title":"Radio science bulletin staff","authors":"","doi":"10.23919/URSIRSB.2020.9523798","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523798","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"3-5"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523798.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50323313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
URSI officers and secretariat URSI官员和秘书处
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523799
{"title":"URSI officers and secretariat","authors":"","doi":"10.23919/URSIRSB.2020.9523799","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523799","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"6-7"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523799.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50323314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Historical corner column 历史角柱
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523814
Giuseppe Pelosi
{"title":"Historical corner column","authors":"Giuseppe Pelosi","doi":"10.23919/URSIRSB.2020.9523814","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523814","url":null,"abstract":"Much has been written about Heinrich Hertz and Guglielmo Marconi. In particular, two recent papers appeared in the IEEE Antennas and Propagation Magazine (G. Smith, 58, 5, 2016, pp. 98–108; and T. Simpson, 60, 4, 2018, pp. 132–140). These thoughtfully analyzed Hertz's apparatus. With such an apparatus, Hertz, within his laboratory walls in 1888, gave experimental evidence of the existence of the electromagnetic waves predicted by James Clerk Maxwell in his Dynamical Theory of the Electromagnetic Field, presented in 1864.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"83-83"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523814.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50323177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual-polarized magnetic-current array antennas with high gain and low profile 高增益、低剖面的双极化磁流阵列天线
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523802
Yue Li
{"title":"Dual-polarized magnetic-current array antennas with high gain and low profile","authors":"Yue Li","doi":"10.23919/URSIRSB.2020.9523802","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523802","url":null,"abstract":"Two sets of feeding networks are usually needed to achieve a dual-polarized high-gain planar antenna, not only leading to a complicated configuration but also to reduced efficiency. A simple feed structure and strategy are therefore in high demand for dual-polarized high-gain planar antennas. Directed at this requirement, we first present a series-fed dual-polarized slot array with a single-layered substrate. Two orthogonal magnetic-current arrays were positioned at the opposite sides of a single-layered substrate, leading to high gain and high port isolation. A novel scheme to achieve dual-polarized, high-gain, and low-profile antennas using the higher-order-mode microstrip antenna was then demonstrated. By loading half-wavelength slots at the electric-field nulls of a higher-order-mode microstrip antenna, a multiple-element in-phase magnetic-current array was constructed within a low-profile cavity with a simple feeding strategy. As a proof of the concept, two dual-polarized high-gain microstrip magnetic-current array antennas, utilizing the TM\u0000<inf>50</inf>\u0000 and TM\u0000<inf>90</inf>\u0000 modes of a microstrip antenna were investigated. These magnetic-current array antennas had the merits of having a low profile, simple feeding, and high isolation, promising a huge potential in diversity and MIMO applications.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"11-16"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523802.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50323166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Freedom, research and serendipity: The joy of discovery 自由、研究和偶然发现：发现的乐趣
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523819
Nicole Meyer-Vernet
{"title":"Freedom, research and serendipity: The joy of discovery","authors":"Nicole Meyer-Vernet","doi":"10.23919/URSIRSB.2020.9523819","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523819","url":null,"abstract":"When asked to write this article, I wondered from where to start and what to write: in chronological order or by research domains? I decided to focus on how fun it is to do science, on the importance of freedom and serendipity, and to only mention subjects close to radio science.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"93-99"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523819.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50415258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
URSI awards 2020–2021 URSI奖2020-2021
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523820
{"title":"URSI awards 2020–2021","authors":"","doi":"10.23919/URSIRSB.2020.9523820","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523820","url":null,"abstract":"At their virtual Board meeting, based on the recommendations of the Awards Panel, the URSI Board of Officers decided to give the 2020 URSI awards to the following distinguished scientists. The URSI GASS 2020 could not take place due to Covid-19, that's why it was decided to hand them over to the awardees at the URSI GASS 2021.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"100-101"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523820.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50415259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Become an individual member of URSI 成为URSI的个人成员
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523826
{"title":"Become an individual member of URSI","authors":"","doi":"10.23919/URSIRSB.2020.9523826","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523826","url":null,"abstract":"The URSI Board of Officers is pleased to announce the establishment of categories of individual membership of URSI. The purpose of individual membership of URSI is to secure professional recognition of individual radioscientists and to establish their better connection with the URSI Board of Officers, Scientific Commissions, and URSI Member Committees. Three categories of individual membership (URSI Corresponding Member, URSI Senior Member and URSI Fellow) have been established.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"112-112"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523826.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50415298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis and design of a W-band circular polarized feed horn with built-in polarizer for low f/D offset-reflector antenna 用于低f/D偏移反射天线的W波段内置偏振器圆极化馈源喇叭的分析与设计
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523803
Ghanshyam Mishra;Satish K. Sharma;Jia-Chi S. Chieh
{"title":"Analysis and design of a W-band circular polarized feed horn with built-in polarizer for low f/D offset-reflector antenna","authors":"Ghanshyam Mishra;Satish K. Sharma;Jia-Chi S. Chieh","doi":"10.23919/URSIRSB.2020.9523803","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523803","url":null,"abstract":"A novel low-axial-ratio W-band left-hand-circularly-polarized (LHCP) cylindrical waveguide feed horn antenna is described using a built-in polarizer. The built-in polarizer section of the horn consisted of nine pairs of circular cavities to generate circular polarization, eliminating the need for an external orthomode transducer or a complex septum. The polarizer was analyzed using the differential dispersion effect from the cavities along the length of the waveguide. The antenna had impedance matching (|S\u0000<inf>11</inf>\u0000| < −15 dB) and an axial ratio below 1.2 dB from 79.5 GHz to 88 GHz. The horn antenna was then used as a feed source to illuminate an offset parabolic reflector of 10 cm diameter and a low f/D = 0.25. The feed-reflector assembly was also integrated inside a 1U volume of a 6U-CubeSat chassis. The radiation performance was analyzed using the Multilevel Fast Multipole Method (MLFMM) along with the Method of Moments (MoM) in TICRA GRASP. The measurement of the prototyped feed horn and the offset parabolic reflector antenna validated the analysis and simulation results.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"17-27"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523803.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50323167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual-focal metalenses based on complete decoupling of amplitude, phase, and polarization 基于振幅、相位和偏振完全解耦的双焦点金属透镜
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523807
He-Xiu Xu;Menghua Jiang;Guangwei Hu;Lei Han;Ying Li;Cheng-Wei Qiu
{"title":"Dual-focal metalenses based on complete decoupling of amplitude, phase, and polarization","authors":"He-Xiu Xu;Menghua Jiang;Guangwei Hu;Lei Han;Ying Li;Cheng-Wei Qiu","doi":"10.23919/URSIRSB.2020.9523807","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523807","url":null,"abstract":"The simultaneous control of amplitude and phase via metasurfaces affords us an unprecedented degree of freedom in manipulating electromagnetic waves. However, currently most designs suffer from low efficiency, which raises certain concerns for real-world applications. Moreover, complete amplitude, phase, and polarization modulation is particularly challenging. This typically requires a combination of attenuators, optically thick wave plates, and large dielectric lenses. Here, we propose an alternative scheme by introducing vertical-mode cross-coupling for polarization control and high efficiency, while involving spatially-varied orientations and structures for independent amplitude and phase modulation. The vertical-mode cross-coupling is synthesized by stacking triple-layer twisted split-ring resonators (SRRs) operated in a transmissive scheme. Such tight cross-coupling and chirality-assisted coherent multiple resonances facilitate high cross-polarization conversion efficiency (∼100%) and a broadband transmission window with full phase coverage. As a proof of concept, two dual-focal metalenses that are challenging to be actualized through conventional metasurfaces were designed and studied numerically and experimentally, with a total thickness of λ\u0000<inf>0</inf>\u0000/12 at microwave frequencies. Desirable dual-focusing behavior with axial and lateral alignment of two foci were demonstrated. Our findings, not confined to microwave operation, open up an alternative way to the fine control of light, and can stimulate novel and high-performance versatile photonic metadevices.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"54-62"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523807.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50323171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In memoriam: Tatsuo Itoh 1940–2021 纪念：伊藤达雄1940–2021
URSI Radio Science Bulletin Pub Date : 2020-09-01 DOI: 10.23919/URSIRSB.2020.9523808
Smail Tedjini;Apostolos Georgiadis
{"title":"In memoriam: Tatsuo Itoh 1940–2021","authors":"Smail Tedjini;Apostolos Georgiadis","doi":"10.23919/URSIRSB.2020.9523808","DOIUrl":"https://doi.org/10.23919/URSIRSB.2020.9523808","url":null,"abstract":"It is not easy to describe the shock and pain of our community after receiving the sad news of the passing of Prof. Tatsuo Itoh. It is so unfortunate that Prof. Itoh accepted giving an invited talk after the Covid-19 pandemic at GASS 2021. It is very hard to find anyone else who has contributed so much, so deeply, and inspired so many people in microwave engineering. Prof. Itoh continuously introduced revolutionary breakthroughs, one after another, until his passing. His gigantic work, remarkable for its quality and diversity, constitutes an extraordinary asset that will guide our explorations and investigations for decades to come. We express our endless recognition and respect for his legendary life and integrity. We express our deepest and sincere condolences to his family.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2020 374","pages":"63-65"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9523795/09523808.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50323172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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