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2020 International Symposium on Antennas and Propagation (ISAP)最新文献

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Performance Comparison of FBP and CS Methods on Microwave Tomography FBP和CS方法在微波断层成像中的性能比较
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391224
Dian Kurnia Imanda, A. Munir
{"title":"Performance Comparison of FBP and CS Methods on Microwave Tomography","authors":"Dian Kurnia Imanda, A. Munir","doi":"10.23919/ISAP47053.2021.9391224","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391224","url":null,"abstract":"This paper presents the investigation and comparative analysis of image reconstruction performance on microwave tomography, namely filtered back projection (FBP) and compressive sensing (CS). The investigation is carried out by processing a picture of tree trunk object with a pixel size of 128 × 128. Performance comparison are assessed using mean square error (MSE) and structural similarity index measure (SSIM) parameters. The result of image reconstruction using CS method has better MSE and SSIM with the value of 0.001 and 0.837, respectively, for smaller image pixel, while the result of using FBP method has SSIM value of 0.901.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116077441","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
Acceleration of DOA-TOA Simultaneous Estimation by Matrix Based Compressed Sensing with Zero Bin Removal 零仓去除下基于矩阵压缩感知的DOA-TOA同步估计加速
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391341
Kiyotaka Shimoshige, Koyo Tategami, M. Fujimoto
{"title":"Acceleration of DOA-TOA Simultaneous Estimation by Matrix Based Compressed Sensing with Zero Bin Removal","authors":"Kiyotaka Shimoshige, Koyo Tategami, M. Fujimoto","doi":"10.23919/ISAP47053.2021.9391341","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391341","url":null,"abstract":"This paper propose an acceleration method of Compressed Sensing by both Kronecker product and zero element removal in estimation of both DOA and TOA. Numerical results show that the calculation time is greatly reduced is by proposed method.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116430786","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: 2
Three-Dimensional Over-The-Air Apparatus for Generating Cluster Environment 用于生成集群环境的三维空中装置
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391152
Toshiya Karasawa, K. Honda
{"title":"Three-Dimensional Over-The-Air Apparatus for Generating Cluster Environment","authors":"Toshiya Karasawa, K. Honda","doi":"10.23919/ISAP47053.2021.9391152","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391152","url":null,"abstract":"This paper presents an appropriate scatterer arrangement that realizes a cluster propagation environment with a Gaussian distribution in azimuth and elevation. Considering the practicability and cost of manufacturing, the size of the instruments needs to be as small as possible. The analytical results show that the arrangement of scatterers can be determined by adjusting the angular spread of the incoming wave with a certain minimum power.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122775000","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
Rain Attenuation Characteristics due to Typhoon Wind Velocities in Satellite Communications Links 台风风速在卫星通讯链路上的雨量衰减特征
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391290
Y. Maekawa, Y. Shibagaki
{"title":"Rain Attenuation Characteristics due to Typhoon Wind Velocities in Satellite Communications Links","authors":"Y. Maekawa, Y. Shibagaki","doi":"10.23919/ISAP47053.2021.9391290","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391290","url":null,"abstract":"Rain attenuation characteristics due to typhoon passage are discussed using the satellite signal observations conducted in Osaka, from 1988 to 2019. The ratio of hourly rain attenuation to rainfall rate is largely enhanced as the typhoon passes the east side of the station, while it becomes smaller in the case of west side passage. Compared with the ground wind velocities of nearby AMeDAS, the equivalent path lengths of rain attenuation become larger as the wind directions approach the opposite of the satellite azimuth angle, while they become smaller as the wind directions near the satellite azimuth angle.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122549839","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
ALOS-PALSAR Quad Pol Data and Image Archive for Monitoring the Earth Environment 用于监测地球环境的ALOS-PALSAR四Pol数据和图像档案
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391190
R. Nakamura, Ryu Sugimoto, Chiaki Tsutsumi, M. Shimada, Y. Yamaguchi
{"title":"ALOS-PALSAR Quad Pol Data and Image Archive for Monitoring the Earth Environment","authors":"R. Nakamura, Ryu Sugimoto, Chiaki Tsutsumi, M. Shimada, Y. Yamaguchi","doi":"10.23919/ISAP47053.2021.9391190","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391190","url":null,"abstract":"Precise monitoring of the earth cover and its historical archive are very important for preserving the healthy earth environment. Since the majority of quad pol data sets acquired with ALOS-PALSAR have been saved unprocessed, National Institute of Advanced Science and Technology have completed full-processing and opened a website on which everyone can search, view and download the global data. These numerous data sets including SLC as well as ortho-rectified scattering power decomposition images can be utilized freely for checking the long-term temporal variation of the land cover. They will serve as a good reference for advanced microwave remote sensing.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122903361","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
Study on Forward Transient Scattering by a Metal Cylinder Covered with a Homogeneous Medium 均匀介质覆盖金属圆柱前向瞬态散射研究
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391379
K. Goto, T. Kawano, H. Uda
{"title":"Study on Forward Transient Scattering by a Metal Cylinder Covered with a Homogeneous Medium","authors":"K. Goto, T. Kawano, H. Uda","doi":"10.23919/ISAP47053.2021.9391379","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391379","url":null,"abstract":"We calculate forward transient scattering by a metal cylinder covered with a homogeneous medium (coated metal cylinder). A time-domain asymptotic-numerical solution (TD-ANS) is used for computations in a forward transient scattered electric field by a coated metal cylinder. An analysis method using the TD-ANS provides a basis of nondestructive testing for corrosion degree of rebar in steel reinforced concrete structures. We confirm the validity of the TD-ANS by comparing with a reference solution. We also discuss an interpretation method of the forward transient scattered electric field using the TD-ANS.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114484671","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 study on an online acceleration of automatic design of RF-DC conversion circuit using neural networks 基于神经网络的RF-DC转换电路在线加速自动设计研究
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391324
Takuma Akada, K. Fujimori
{"title":"A study on an online acceleration of automatic design of RF-DC conversion circuit using neural networks","authors":"Takuma Akada, K. Fujimori","doi":"10.23919/ISAP47053.2021.9391324","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391324","url":null,"abstract":"The design method of RF-DC conversion circuits for wireless power transmission is discussed. The extent to which circuit properties can be estimated using convolutional neural networks is discussed in this study. In order to use an automatic design method for circuit design, it is a problem that it takes time for electromagnetic field analysis. It is shown that the proposed method may make it possible to design circuits in a realistic time.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114503651","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 Dual-band J-type Meander Antenna for 5G Applications 面向5G应用的双频j型弯曲天线
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391274
Shoya Tanaka, K. Noguchi
{"title":"A Dual-band J-type Meander Antenna for 5G Applications","authors":"Shoya Tanaka, K. Noguchi","doi":"10.23919/ISAP47053.2021.9391274","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391274","url":null,"abstract":"In recent years, small antennas have been developed for portable devices such as smartphones and tablet PC devices. As the development of electronic devices progresses toward IoT, miniaturization of antennas with high performance are required rapidly. Sharing of a terminal for multiple frequencies is demanded to use several wireless systems. In this project, we study on a J-type antenna that enables dual frequency sharing and conduct research on miniaturization. After simulations of fundamental J-type antennas were examined to understand the principle of dual frequency sharing, miniaturization of the J-type antenna was conducted with meander elements. In this report, we research the miniaturization of the J-type antenna for the purpose of sharing in the 5G frequency bands. After the dual-band J-type meander antenna is simulated, characteristics of the antenna are clarified in measurement.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121987160","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
Directive Antenna Design at 2.4 GHz on Foot Surface for Wanderer Location Identification 用于流浪者位置识别的2.4 GHz脚表面指令天线设计
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391396
Md Ismail Haque, Kengo Yoshibayashi, Jianqing Wang, G. Fischer, J. Kirchner
{"title":"Directive Antenna Design at 2.4 GHz on Foot Surface for Wanderer Location Identification","authors":"Md Ismail Haque, Kengo Yoshibayashi, Jianqing Wang, G. Fischer, J. Kirchner","doi":"10.23919/ISAP47053.2021.9391396","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391396","url":null,"abstract":"A directional patch array antenna was designed for wanderer location identification. The antenna was used for foot-mounted BLE beacons at 2.4 GHz band. Its directional performance was evaluated by simulation and it was found that the antenna can sweep diagonally upward from 7° to 35°.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117004304","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: 2
Multi-Laptop-Antenna Designs for 2.4/5/6 GHz WLAN and 5G NR77/78/79 Operation 2.4/5/6 GHz WLAN和5G NR77/78/79操作的多笔记本电脑天线设计
2020 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2021-01-25 DOI: 10.23919/ISAP47053.2021.9391347
Cheng-Tse Lee, Che-Chi Wan, Saou‐Wen Su
{"title":"Multi-Laptop-Antenna Designs for 2.4/5/6 GHz WLAN and 5G NR77/78/79 Operation","authors":"Cheng-Tse Lee, Che-Chi Wan, Saou‐Wen Su","doi":"10.23919/ISAP47053.2021.9391347","DOIUrl":"https://doi.org/10.23919/ISAP47053.2021.9391347","url":null,"abstract":"Two sets of the two-antenna systems in laptop computers are proposed. The first set comprises two WLAN antennas, each of which is fed by a coupling loop and having a conjoined, central T strip. The design is capable of new 6 GHz operation in addition to the current 2.4 and 5 GHz WLAN bands. The second set of the designs is a two-5G-NR-antenna system, covering the 3.3-5.0 GHz wideband and decoupled using the same loop shared by the feeding monopoles.","PeriodicalId":165901,"journal":{"name":"2020 International Symposium on Antennas and Propagation (ISAP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128470198","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
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