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2021 International Symposium on Antennas and Propagation (ISAP)最新文献

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A Printed-Inverted F Antenna Combined with Two L-Shaped Elements for Dual Band Circular Polarization 双波段圆极化打印倒F天线与两个l形元件
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614396
T. Fujimoto, Chai-Eu Guan
{"title":"A Printed-Inverted F Antenna Combined with Two L-Shaped Elements for Dual Band Circular Polarization","authors":"T. Fujimoto, Chai-Eu Guan","doi":"10.23919/ISAP47258.2021.9614396","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614396","url":null,"abstract":"Authors have proposed a printed inverted-F antenna (IFA) for dual-band dual-sense circular polarization. In this paper, a printed IFA combined with two L-shaped elements for dual-band circular polarization. The proposed antenna radiates same sense circular polarization in two frequency bands. The relationship between the antenna characteristics (return loss, axial ratio, and gain) and the additional L-shaped elements are discussed. The bandwidth of 10dB-return loss with a 3dB-axial ratio are 4.6% and 7.6% in the lower and higher frequency bands. The antenna size is relatively small.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123313584","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}
引用次数: 1
Realistic Interference Simulations in a Data Center Offering Wireless Communication at Low Terahertz Frequencies 提供低太赫兹无线通信的数据中心的真实干扰模拟
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614511
Johannes M. Eckhardt, Christoph Herold, Björn Friebel, Nils Dreyer, T. Kürner
{"title":"Realistic Interference Simulations in a Data Center Offering Wireless Communication at Low Terahertz Frequencies","authors":"Johannes M. Eckhardt, Christoph Herold, Björn Friebel, Nils Dreyer, T. Kürner","doi":"10.23919/ISAP47258.2021.9614511","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614511","url":null,"abstract":"This paper presents the simulation of Top-of-Rack wireless links in a data center at terahertz frequencies. The propagation is simulated via ray tracing considering the effect of beam-steerable antennas. The data transmission is evaluated by link level simulations where the time-discrete interference signals are superposed at the receiver. The simulation shows that interference leads to a signal-to-interference ratio below 10dB for more than half of the links.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124749164","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}
引用次数: 3
Recursive geolocation of unknown emitters using TDOAs of three GEOs 利用三颗地球卫星的tdoa对未知发射源进行递归定位
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614619
T. Amishima, R. Takahashi
{"title":"Recursive geolocation of unknown emitters using TDOAs of three GEOs","authors":"T. Amishima, R. Takahashi","doi":"10.23919/ISAP47258.2021.9614619","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614619","url":null,"abstract":"This paper addresses the problem of geolocating the unknown emitters causing uplink interference on the geostationary satellite. One common method is to utilize Time difference of Arrival (TDOA) of three GEOs. However, this method has an inherent problem that the geolocation accuracy is not good enough due to fact that two TDOA lines are nearly parallel. Furthermore, there are misdetection of TDOAs when the interference signals are not received properly. In this paper, we propose a novel recursive leased square (RLS) based geolocation method, which improves the geolocation accuracy up to 14 % compared with the conventional method.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123585777","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}
引用次数: 0
Research on Maritime Floating Buoys that can be Observed with Synthetic Aperture Radar Satellites 基于合成孔径雷达卫星的海上浮动浮标观测研究
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614603
Toshiyuki Miyazaki, Fumihiro Takahashi, T. Hosokawa
{"title":"Research on Maritime Floating Buoys that can be Observed with Synthetic Aperture Radar Satellites","authors":"Toshiyuki Miyazaki, Fumihiro Takahashi, T. Hosokawa","doi":"10.23919/ISAP47258.2021.9614603","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614603","url":null,"abstract":"In the coastal fishery, it is becoming more important to measure the position of fishing gear such as set-net using SAR satellites. In this study, we studied the retroreflective structure using the Luneberg lens in order to detect the floating buoys such as fishing gear with the SAR satellite radar. A prototype of the Luneberg lens was made using 3D printers, and it was confirmed by electromagnetic field simulation analysis, and we analyzed that it has a focus on the interface with seawater and it has the property of retroreflective.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121717756","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}
引用次数: 1
Mantle Cloak Antenna Using Strip Conductors for Mutual Coupling Reduction at Frequency Lower Than Operating Frequency 采用带状导体的斗篷天线在低于工作频率处减小相互耦合
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614459
T. Nguyen, Hiroshi Hashiguchi, N. Michishita, H. Morishita, T. Miyazaki, M. Tadokoro
{"title":"Mantle Cloak Antenna Using Strip Conductors for Mutual Coupling Reduction at Frequency Lower Than Operating Frequency","authors":"T. Nguyen, Hiroshi Hashiguchi, N. Michishita, H. Morishita, T. Miyazaki, M. Tadokoro","doi":"10.23919/ISAP47258.2021.9614459","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614459","url":null,"abstract":"In this paper, a mantle cloak antenna using strip conductors for mutual coupling reduction at a lower frequency than the antenna’s operating frequency is proposed. As a result, by using the strip conductors locating around the surface of a dielectric substrate, the mutual coupling of the mantle cloak antenna at 720 MHz can be reduced, and the antenna characteristics of the antenna can be maintained at 750 MHz simultaneously.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124120653","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}
引用次数: 0
Coherent Phase Calibration of the 5G Massive MIMO Devices Using CATR OTA Test Method 基于CATR OTA测试方法的5G大规模MIMO设备相干相位校准
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614399
Cheng-Nan Hu, Jacobi Chen, Zong-Ting Csai, P. X. Wang, Jiaquan Wu
{"title":"Coherent Phase Calibration of the 5G Massive MIMO Devices Using CATR OTA Test Method","authors":"Cheng-Nan Hu, Jacobi Chen, Zong-Ting Csai, P. X. Wang, Jiaquan Wu","doi":"10.23919/ISAP47258.2021.9614399","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614399","url":null,"abstract":"This study proposes the modified element-excitation method (EEM) for the coherent phase calibration of the mm-wave active phased array antenna in CATR chamber. The experimental study of a 32-element mm-wave phased array antenna validates the proposed method.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126223909","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}
引用次数: 1
A Novel Planar Perforated Hyperbolic Secant Lens Antenna for Milli-Wave Applications 一种用于毫米波的新型平面穿孔双曲割线透镜天线
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614523
Wenyi Shao, Qiang Chen
{"title":"A Novel Planar Perforated Hyperbolic Secant Lens Antenna for Milli-Wave Applications","authors":"Wenyi Shao, Qiang Chen","doi":"10.23919/ISAP47258.2021.9614523","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614523","url":null,"abstract":"In this paper, a novel generalized hyperbolic secant (H-S) lens antenna is introduced using perforated dielectric. The simulation results show 24.7dBi of realized gain at 10 GHz with low sidelobe levels (less than -18dB) and 3-dB beamwidth of 9° can be achieved. The 3-D printing technique can be utilized to fabricate the perforated structure of proposed lens. Due to its intrinsic flat shape characteristic, this lens concept could be a potential alternative design for planar Luneburg and half Maxwell fish-eye lens for millimeter-wave application, avoiding using extremely complex conformal mapping methods.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126500465","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}
引用次数: 0
Imaging of Object in Front of Human Body Phantom Using Leaky-Wave Focusing Antenna 漏波聚焦天线在人体幻影前成像中的应用
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614380
Kevin Kipruto Mutai, Hiroyasu Sato, Qiang Chen
{"title":"Imaging of Object in Front of Human Body Phantom Using Leaky-Wave Focusing Antenna","authors":"Kevin Kipruto Mutai, Hiroyasu Sato, Qiang Chen","doi":"10.23919/ISAP47258.2021.9614380","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614380","url":null,"abstract":"In this paper, millimeter-wave imaging using two rectangular waveguide leaky-wave focusing antennas in a quasi-monostatic arrangement was performed. One-dimensional detection of a conducting and dielectric cylinders positioned in front of a human body phantom representing the human body was performed by experiment to confirm the imaging capability of the proposed system. Two-dimensional imaging of a conducting cylinder positioned front of the phantom was finally performed.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125960152","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}
引用次数: 0
Relationships between Mobile Phones’ Metal Exteriors and Millimeter-Wave Antennas 手机金属外壳与毫米波天线的关系
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614565
Huan-Chu Huang
{"title":"Relationships between Mobile Phones’ Metal Exteriors and Millimeter-Wave Antennas","authors":"Huan-Chu Huang","doi":"10.23919/ISAP47258.2021.9614565","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614565","url":null,"abstract":"This paper innovatively presents interesting and inspiring discussions on three relationships between mobile phones’ metal exteriors and millimeter-Wave (mm-Wave) antennas so that the future developments and advances on mm-Wave antennas in the mobile phones can be promisingly enlightened and triggered. The three analyzed relationships involve: (1) the negative one wherein the metal exteriors to mm-Wave antennas are the constraints needed to be overcome, (2) the positive one wherein the metal exteriors to mm-Wave antennas are the contributors able to be utilized, and (3) the combined one wherein the mm-Wave antenna carriers are the extensions of the metal exteriors to benefit the performance of non-mm-Wave antennas in the form of the metal exteriors.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129941734","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}
引用次数: 0
A Novel CPW Wideband Circularly Polarized Antenna for 5G Millimeter-wave System 5G毫米波系统新型CPW宽带圆极化天线
2021 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-10-19 DOI: 10.23919/ISAP47258.2021.9614624
X.M. Chen, Junlin Wang, Xin Wang, Rui Shao
{"title":"A Novel CPW Wideband Circularly Polarized Antenna for 5G Millimeter-wave System","authors":"X.M. Chen, Junlin Wang, Xin Wang, Rui Shao","doi":"10.23919/ISAP47258.2021.9614624","DOIUrl":"https://doi.org/10.23919/ISAP47258.2021.9614624","url":null,"abstract":"In this communication, a novel coplanar waveguide (CPW) fed slot antenna with wideband circularly polarized characteristics is proposed for the 5G millimeter-wave system. In addition to the traditional inverted-L structure at front side, a pair of inverted-L strip and a parasitic patch at the back of the substrate are creatively added to the antenna. The simulation results show that an impedance bandwidth is 41.07% (22-33.5GHz), and an AR bandwidth is 20.1% (24.17-29.8GHz), covering the 5G band n257 and n258.","PeriodicalId":132941,"journal":{"name":"2021 International Symposium on Antennas and Propagation (ISAP)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129975078","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}
引用次数: 0
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