Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993581
Koki Iijima, Keito Yokoe, S. Makino, K. Itoh
The meta surface-inspired antenna chip developed by KIT EOE Laboratory (MACKEY) is a small antenna that is unaffected by metal. The MACKEY Q type was developed based on MACKEY. It was miniaturized to a square with λ/4 on a side. This article proposes an antenna that can radiate radio waves of two polarizations with different desired frequencies by varying the design parameters of the antenna.
{"title":"Dual-Frequency Sharing in MACKEY Q Type","authors":"Koki Iijima, Keito Yokoe, S. Makino, K. Itoh","doi":"10.1109/iWEM52897.2022.9993581","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993581","url":null,"abstract":"The meta surface-inspired antenna chip developed by KIT EOE Laboratory (MACKEY) is a small antenna that is unaffected by metal. The MACKEY Q type was developed based on MACKEY. It was miniaturized to a square with λ/4 on a side. This article proposes an antenna that can radiate radio waves of two polarizations with different desired frequencies by varying the design parameters of the antenna.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127456754","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 : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993570
Masao Fujita, Masayuki Toyoda, K. Takano, Sangyeop Lee, S. Hara, I. Watanabe, A. Kasamatsu
A method to suppress unnecessary electromagnetic-wave (EM-wave) radiation is required in the future communication environment where various ultra-high frequency bands (e.g., 275-450GHz) are supposed to be used. This work demonstrates terahertz EM-wave absorbers targeting 300-GHz and 400-GHz bands.
{"title":"Development of Terahertz EM-Wave Absorber","authors":"Masao Fujita, Masayuki Toyoda, K. Takano, Sangyeop Lee, S. Hara, I. Watanabe, A. Kasamatsu","doi":"10.1109/iWEM52897.2022.9993570","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993570","url":null,"abstract":"A method to suppress unnecessary electromagnetic-wave (EM-wave) radiation is required in the future communication environment where various ultra-high frequency bands (e.g., 275-450GHz) are supposed to be used. This work demonstrates terahertz EM-wave absorbers targeting 300-GHz and 400-GHz bands.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124277273","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 : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993484
Masayoshi Takao, S. Makino, Yusuke Kaimori
The reflectarray antenna (hereinafter referred to as “reflectarray”) applies the reflection phase control function of frequency selective reflector to a plane reflector. Various beam shapes can be formed by appropriately selecting the mirror surface configuration and the shape of the resonance elements. In this study, a reflectarray that changes the beam direction depending on the polarization is investigated.
{"title":"Analysis Results of Single-Layered Reflectarray Antenna with Split Rectangular Loop Elements","authors":"Masayoshi Takao, S. Makino, Yusuke Kaimori","doi":"10.1109/iWEM52897.2022.9993484","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993484","url":null,"abstract":"The reflectarray antenna (hereinafter referred to as “reflectarray”) applies the reflection phase control function of frequency selective reflector to a plane reflector. Various beam shapes can be formed by appropriately selecting the mirror surface configuration and the shape of the resonance elements. In this study, a reflectarray that changes the beam direction depending on the polarization is investigated.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114890403","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 : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993471
Ryuji Hirohara, Shinpei Fusazaki, K. Noguchi
With the start of the 5G operations, it will become more important to apply communication systems to automo-biles, which has been promoted in recent years as connected cars. Multi-band antennas are required to reduce the in-vehicle space which is occupied by communication equipment. We de-signed dual-band antennas for the sub-6 GHz 5G bands and the intelligent transport systems (ITS) especially the driving safety support system (DSSS) by loading helical elements to modified conical antennas (MCA), and conducted simulations and meas-urements. As a result, the antenna satisfied the sub-6 and ITS DSSS bands in the simulations. There were slightly differences between the calculated and measured results.
{"title":"Study on Dual-band Antennas with a Modified Conical Antenna and a Parasitic Helical Element","authors":"Ryuji Hirohara, Shinpei Fusazaki, K. Noguchi","doi":"10.1109/iWEM52897.2022.9993471","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993471","url":null,"abstract":"With the start of the 5G operations, it will become more important to apply communication systems to automo-biles, which has been promoted in recent years as connected cars. Multi-band antennas are required to reduce the in-vehicle space which is occupied by communication equipment. We de-signed dual-band antennas for the sub-6 GHz 5G bands and the intelligent transport systems (ITS) especially the driving safety support system (DSSS) by loading helical elements to modified conical antennas (MCA), and conducted simulations and meas-urements. As a result, the antenna satisfied the sub-6 and ITS DSSS bands in the simulations. There were slightly differences between the calculated and measured results.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128913301","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 : 2022-08-29DOI: 10.1109/iWEM52897.2022.9992302
C. Rakluea, A. Worapishet, S. Chaimool, Yan Zhao, P. Akkaraekthalin
Two-way alternately coupled magnetoinductive waveguide for wireless power transfer is presented in this paper. With the use of the alternate coupling polarities between consecutive resonator cells and quadrature phase termination at the last cell, the nulls-free characteristics were clearly achieved for all locations. The power is transferred to a single receiver with 74% from the input power. For two receivers placed separately on each path, a small variation of power transfer percentage ranging from 40% to 43% is obtained. Finally, the proposed configuration model can be developed to power and charge multiple electronic devices, robots and EVs without nulling effect.
{"title":"Alternately Coupled Magnetoinductive Waveguide with Nulls-Free Characteristic for Two-Way Wireless Power Transfer Application","authors":"C. Rakluea, A. Worapishet, S. Chaimool, Yan Zhao, P. Akkaraekthalin","doi":"10.1109/iWEM52897.2022.9992302","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9992302","url":null,"abstract":"Two-way alternately coupled magnetoinductive waveguide for wireless power transfer is presented in this paper. With the use of the alternate coupling polarities between consecutive resonator cells and quadrature phase termination at the last cell, the nulls-free characteristics were clearly achieved for all locations. The power is transferred to a single receiver with 74% from the input power. For two receivers placed separately on each path, a small variation of power transfer percentage ranging from 40% to 43% is obtained. Finally, the proposed configuration model can be developed to power and charge multiple electronic devices, robots and EVs without nulling effect.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127732071","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 : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993589
Zin Mar Phyo, T. Fujimoto, Chai-Eu Guan
A broadband circularly polarized multiple-input multiple-output (MIMO) antenna for Sub 6 GHz 5G application is presented. The MIMO antenna has been designed on FR4 substrate and each printed monopole antenna is connected to a coaxial feed. To enhance antenna gain, a reflector is placed below the antenna. The bandwidth of 10 dB return loss with a 3 dB axial ratio is 36.14% from 3.4 to 4.9 GHz meanwhile transmission coefficients are less than -20 dB.
{"title":"Wideband Circularly Polarized MIMO Antenna for Sub 6 GHz 5G Application","authors":"Zin Mar Phyo, T. Fujimoto, Chai-Eu Guan","doi":"10.1109/iWEM52897.2022.9993589","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993589","url":null,"abstract":"A broadband circularly polarized multiple-input multiple-output (MIMO) antenna for Sub 6 GHz 5G application is presented. The MIMO antenna has been designed on FR4 substrate and each printed monopole antenna is connected to a coaxial feed. To enhance antenna gain, a reflector is placed below the antenna. The bandwidth of 10 dB return loss with a 3 dB axial ratio is 36.14% from 3.4 to 4.9 GHz meanwhile transmission coefficients are less than -20 dB.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116694523","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 : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993532
A. Hirata, Shunta Takagi, Keisuke Matsui
The use of 300-GHz-band wireless links is currently being considered for the next generation of mobile communications, Beyond 5G, to achieve communication speeds exceeding 100 Gbit/s. Recently, research and development of 300-GHz-band mobile communications and wireless LANs in the 300 GHz band are underway. In order to realize these use cases, it is necessary to construct propagation models for reflection, interception, and diffraction by building materials, human bodies, and trees in the 300 GHz band. This paper presents the results of experimental investigation of reflection, shadowing, and diffraction by building materials, human bodies, and trees in the 300 GHz band.
{"title":"Indoor and outdoor 300-GHz-band wireless propagation experiments for beyond 5G application","authors":"A. Hirata, Shunta Takagi, Keisuke Matsui","doi":"10.1109/iWEM52897.2022.9993532","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993532","url":null,"abstract":"The use of 300-GHz-band wireless links is currently being considered for the next generation of mobile communications, Beyond 5G, to achieve communication speeds exceeding 100 Gbit/s. Recently, research and development of 300-GHz-band mobile communications and wireless LANs in the 300 GHz band are underway. In order to realize these use cases, it is necessary to construct propagation models for reflection, interception, and diffraction by building materials, human bodies, and trees in the 300 GHz band. This paper presents the results of experimental investigation of reflection, shadowing, and diffraction by building materials, human bodies, and trees in the 300 GHz band.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126664523","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 : 2022-08-29DOI: 10.1109/iWEM52897.2022.9992301
M. Ishida, Keizo Cho, N. Michishita, Tanan Hongnara, Takayoshi Sasaki, Warangkana Chaihongsa, Keisuke Sato, I. Oshima, H. Nakabayashi
Huygens' metasurfaces have attracted attention as a method for constructing thin lenses. In this report, we focus on I-shaped elements as an example of a structure of Huygens' metasurface and propose a lens that can change the pass-through phase at 28 GHz with the maximum of −2 dB loss and almost no phase change at 25.75 GHz using Huygens' metasurface.
{"title":"Unit cell structure of Huygens' Metasurfaces Reducing Beam Squint in Series-Fed Array","authors":"M. Ishida, Keizo Cho, N. Michishita, Tanan Hongnara, Takayoshi Sasaki, Warangkana Chaihongsa, Keisuke Sato, I. Oshima, H. Nakabayashi","doi":"10.1109/iWEM52897.2022.9992301","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9992301","url":null,"abstract":"Huygens' metasurfaces have attracted attention as a method for constructing thin lenses. In this report, we focus on I-shaped elements as an example of a structure of Huygens' metasurface and propose a lens that can change the pass-through phase at 28 GHz with the maximum of −2 dB loss and almost no phase change at 25.75 GHz using Huygens' metasurface.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125576086","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 : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993529
Jui-Han Lu, Wei-Ren Chuang, Bo-Ming Chen
In this paper, we propose a Wi-Fi 6E multi-band 2×2 multi-input multi-output (MIMO) antenna in a 5G terminal device. With the use of L-shaped slit and the coupled-feed metal frame, multi resonant modes close to 2.45 / 5.5 / 6.5 GHz band are excited to meet the specifications of Wi-Fi 6E system. And, the obtained impedance bandwidth across the operating bands can reach about 100 / 800 / 1200 MHz with the measured peak gains and antenna efficiencies close to 3.6 / 3.9 / 4.7 dBi and 60 / 73 / 70 % across 2.45 / 5.5 / 6.5 GHz bands, respectively.
{"title":"A Multi-band Metal-frame Antenna for Wi-Fi 6E System in a Terminal Device","authors":"Jui-Han Lu, Wei-Ren Chuang, Bo-Ming Chen","doi":"10.1109/iWEM52897.2022.9993529","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993529","url":null,"abstract":"In this paper, we propose a Wi-Fi 6E multi-band 2×2 multi-input multi-output (MIMO) antenna in a 5G terminal device. With the use of L-shaped slit and the coupled-feed metal frame, multi resonant modes close to 2.45 / 5.5 / 6.5 GHz band are excited to meet the specifications of Wi-Fi 6E system. And, the obtained impedance bandwidth across the operating bands can reach about 100 / 800 / 1200 MHz with the measured peak gains and antenna efficiencies close to 3.6 / 3.9 / 4.7 dBi and 60 / 73 / 70 % across 2.45 / 5.5 / 6.5 GHz bands, respectively.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130332763","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 : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993585
Wei-Chiang Jhang, Jwo-Shiun Sun
This paper presents small size and narrow border antenna for Wireless LAN (WLAN) and WIFI for laptop. The antenna occupies only 38.5×3×0.4 mm3, and the antenna is combined with 200×260 mm2 copper plate to simulated system ground plane. PCB uses two layer and two components of direct-fed arm (front side) and coupled arm (bottom side). In bottom side couple arm form 1/4-λ fundamental at 2.4 GHz and its higher mode at 5.75 GHz. In front side direct-fed arm form 1/4-λ fundamental at 5.5 GHz. In far field measured, peak gain and efficiency in low and high band are 1.9-2.4 dBi and 45–61 %. Finally, experiments demonstrate that the present antenna exhibits a good performance for Narrow boarder.
{"title":"Small WIFI/WLAN antenna for narrow boarder design","authors":"Wei-Chiang Jhang, Jwo-Shiun Sun","doi":"10.1109/iWEM52897.2022.9993585","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993585","url":null,"abstract":"This paper presents small size and narrow border antenna for Wireless LAN (WLAN) and WIFI for laptop. The antenna occupies only 38.5×3×0.4 mm3, and the antenna is combined with 200×260 mm2 copper plate to simulated system ground plane. PCB uses two layer and two components of direct-fed arm (front side) and coupled arm (bottom side). In bottom side couple arm form 1/4-λ fundamental at 2.4 GHz and its higher mode at 5.75 GHz. In front side direct-fed arm form 1/4-λ fundamental at 5.5 GHz. In far field measured, peak gain and efficiency in low and high band are 1.9-2.4 dBi and 45–61 %. Finally, experiments demonstrate that the present antenna exhibits a good performance for Narrow boarder.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"2021 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133592789","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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