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2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)最新文献

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Reflection and Shadowing Loss due to Human Body in 300-GHz-band Wireless Links 300- ghz波段无线链路中人体反射和阴影损耗
2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2022-08-29 DOI: 10.1109/iWEM52897.2022.9993469
Shunta Takagi, Keisuke Matsui, A. Hirata, Kazuki Takezawa, Takahiro Hayashi
{"title":"Reflection and Shadowing Loss due to Human Body in 300-GHz-band Wireless Links","authors":"Shunta Takagi, Keisuke Matsui, A. Hirata, Kazuki Takezawa, Takahiro Hayashi","doi":"10.1109/iWEM52897.2022.9993469","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993469","url":null,"abstract":"This paper presents the results of evaluation about the characteristics of reflection and blockage losses due to the human body in the 300 GHz band. In the evaluation of the angular dependence of reflection loss due to the human body, losses of approximately −20 dB to −30 dB were observed. The blockage loss by a human wearing a shirt and a human wearing a down coat was approximately −26dB and −23dB, respectively. The blockage loss by a human wearing a down coat was −23 dB, which was 3 dB lower than that of a shirt.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"24 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":"130633086","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
Design of a dual-ring microstrip antenna excited by an inclined slot on a narrow wall of the rectangular waveguide for a 45-degree linearly-polarized planar array 45度线极化平面阵列矩形波导窄壁斜槽激励双环微带天线设计
2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2022-08-29 DOI: 10.1109/iWEM52897.2022.9993479
Takuma Sato, S. Saito, Y. Kimura
{"title":"Design of a dual-ring microstrip antenna excited by an inclined slot on a narrow wall of the rectangular waveguide for a 45-degree linearly-polarized planar array","authors":"Takuma Sato, S. Saito, Y. Kimura","doi":"10.1109/iWEM52897.2022.9993479","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993479","url":null,"abstract":"This paper presents design of a dual-ring microstrip antenna (MSA) fed by an inclined slot on a narrow wall of the rectangular waveguide for a 45-degree linearly-polarized planar array. In order to suppress grating lobes radiated from a slot array arranged at a spacing of one guided wavelength of the waveguide, it is proposed to arrange dual-ring MSAs with a circumference of approximately 5 wavelengths on the slot array with a dielectric substrate. In this paper, a dual-ring parallelogram MSA excited by an inclined slot on a narrow wall of the waveguide is designed as an element of a 45-degree linearly-polarized planar array by using ANSYS HFSS. The design frequency is 11.2 GHz and an X-band standard waveguide is used. It is confirmed by the simulation that 45-degree linearly polarized radiation as well as a sharp main beam in the waveguide axis plane for grating lobe suppression can be obtained by the designed MSA at the design frequency.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"50 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":"124046233","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
Design of a Single-Layer Dual-Band and Wideband Multi-Ring Microstrip Antenna Fed by an L-probe l型探头馈电的单层双带宽带多环微带天线设计
2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2022-08-29 DOI: 10.1109/iWEM52897.2022.9993521
Masaya Takahashi, S. Saito, Y. Kimura
{"title":"Design of a Single-Layer Dual-Band and Wideband Multi-Ring Microstrip Antenna Fed by an L-probe","authors":"Masaya Takahashi, S. Saito, Y. Kimura","doi":"10.1109/iWEM52897.2022.9993521","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993521","url":null,"abstract":"This paper presents design of a single-layer dual-band and wideband multi-ring microstrip antenna (MR-MSA) fed by an L-probe. The proposed antenna consists of two split ring patches arranged concentrically and a feeding L-shaped probe (L-probe) placed on a single-layer dielectric substrate. The two patches are excited by the L-probe and resonate at two different frequencies. In order to realize wideband operation, a thick dielectric substrate with a thickness of approximately 0.1 wavelengths is used. The design frequencies of the proposed antenna are around 9 GHz and 15 GHz. In this paper, the structural parameters of the proposed antenna are tuned by using ANSYS HFSS so as to obtain dual-band and wideband operation at the two design frequencies. The simulated results reveal that fractional bandwidths of less than −10 dB reflection for the two bands are approximately 10%. It is also confirmed by the simulation that stable unidirectional radiation patterns are obtained for the two bands.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"176 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":"129178439","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
Design of a MIMO Open-Slot Antenna Module with Dual-Band Circular Polarization 双频圆极化MIMO开槽天线模块设计
2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2022-08-29 DOI: 10.1109/iWEM52897.2022.9992306
W. Li, Chien-Sheng Chen, Chien‐Jen Wang
{"title":"Design of a MIMO Open-Slot Antenna Module with Dual-Band Circular Polarization","authors":"W. Li, Chien-Sheng Chen, Chien‐Jen Wang","doi":"10.1109/iWEM52897.2022.9992306","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9992306","url":null,"abstract":"A multi-input multi-output (MIMO) open-slot antenna module with dual-band circular polarization has been presented in this work. Two horizontal and stepped-impedance (SI) open-circuited slot structure as the radiator are etched in the ground plane and two T -shaped microstrip lines as the feeding line are placed above the horizontal open-slots. A vertical and SI open-circuited slot is also embedded in the ground plane to excite circular polarization around 2.4 GHz and to improve mutual coupling between the two horizontal open-slots. To enhance circular polarization at 5-GHz band, two pairs of two closed slots are etched in the upper and lower parts of the ground plane. From the measured results of the proposed antenna module, the −10 dB impedance bandwidths range from1.72 to 3.93 GHz and from 4.67 to 6.39 GHz. In addition, the in-band isolation is larger than 16 dB. The proposed antenna provides dual-band circular polarization, which covers the triple-band wireless local area network (WLAN) applications, including 2.4, 5.2, and 5.8 GHz. The bandwidths of the simulated axial-ratio (AR) values less than 3 dB are 2.21-2.55 GHz and 5.09 – 6.33 GHz.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"133 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":"129257507","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 Simple Weight Calculation Method for Generalized Imperfect Block Diagonalization in MU-MIMO Downlink MU-MIMO下行链路广义不完全块对角化的一种简单权值计算方法
2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2015-12-01 DOI: 10.1109/iWEM52897.2022.9993470
Tadatomo Sato, Teruji Ide
{"title":"A Simple Weight Calculation Method for Generalized Imperfect Block Diagonalization in MU-MIMO Downlink","authors":"Tadatomo Sato, Teruji Ide","doi":"10.1109/iWEM52897.2022.9993470","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993470","url":null,"abstract":"This paper presents a simple method for deriving transmit/receive weight vectors by using determinants and cofactors for single-stream transmission with generalized imperfect block diagonalization in MU-MIMO downlink.","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":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115910288","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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