Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993480
Anri Kamiya, N. Ishii, Masaharu Takahashi, Qiang Chen
The effect of existence of a tank in the pseudo-scale model experimental system is investigated by numerical simulation using the FDTD method. Comparison of simulation results for three models including with-tank and no-tank models, confirms that there is no effect of the tank on the electric field distribution at the sea surface, except near the tank wall. It is also observed that raising the water level and decreasing the air volume inside the tank can slightly reduce the effect of the electric field in the air penetrating the tank wall.
{"title":"Numerical Evaluation on Tank Effect in a Pseudo-Scale Air-Sea Two-Layer Experimental Model","authors":"Anri Kamiya, N. Ishii, Masaharu Takahashi, Qiang Chen","doi":"10.1109/iWEM52897.2022.9993480","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993480","url":null,"abstract":"The effect of existence of a tank in the pseudo-scale model experimental system is investigated by numerical simulation using the FDTD method. Comparison of simulation results for three models including with-tank and no-tank models, confirms that there is no effect of the tank on the electric field distribution at the sea surface, except near the tank wall. It is also observed that raising the water level and decreasing the air volume inside the tank can slightly reduce the effect of the electric field in the air penetrating the tank wall.","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":"129648027","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/iWEM52897.2022.9993488
Yuping Tan, Fuhai Li, Y. Qi
This paper systematically reviews the multipath mitigation methods based on the Carrier-to-Noise-density ratio (C/N0) in Global Navigation Satellite System (GNSS), according to the three core ideas of threshold selection, variance weighting, and error correction. It is concluded that the complexity of multipath signals poses challenges to these methods in practice. Thus, the methods may require antenna design techniques to function more efficiently, which provides a guideline for further exploration of the new multipath mitigation methods.
{"title":"C/N0-Based GNSS Multipath Mitigation Methods: Research, Challenges, and Prospects","authors":"Yuping Tan, Fuhai Li, Y. Qi","doi":"10.1109/iWEM52897.2022.9993488","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993488","url":null,"abstract":"This paper systematically reviews the multipath mitigation methods based on the Carrier-to-Noise-density ratio (C/N0) in Global Navigation Satellite System (GNSS), according to the three core ideas of threshold selection, variance weighting, and error correction. It is concluded that the complexity of multipath signals poses challenges to these methods in practice. Thus, the methods may require antenna design techniques to function more efficiently, which provides a guideline for further exploration of the new multipath mitigation methods.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"87 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":"132719456","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/iWEM52897.2022.9993500
Shota Matsumoto, H. Arai
For an indoor base station antenna at the 28-GHz band, we propose an dual-polarized antenna designed to radiate in all directions, using horn antennas. In order to utilize both polarizations in all directions, 6 E-plane and 6 H-plane horn antennas are arranged alternately in a circle with equal angle spacing. The aperture surface sizes and flare lengths of the horn antennas of the proposed configuration are determined by simulation to achieve a gain of 15 dB in all directions and for both polarizations, and we confirm that the target characteristics were achieved.
{"title":"28 GHz 6-sector dual-polarized antenna for indoor base station","authors":"Shota Matsumoto, H. Arai","doi":"10.1109/iWEM52897.2022.9993500","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993500","url":null,"abstract":"For an indoor base station antenna at the 28-GHz band, we propose an dual-polarized antenna designed to radiate in all directions, using horn antennas. In order to utilize both polarizations in all directions, 6 E-plane and 6 H-plane horn antennas are arranged alternately in a circle with equal angle spacing. The aperture surface sizes and flare lengths of the horn antennas of the proposed configuration are determined by simulation to achieve a gain of 15 dB in all directions and for both polarizations, and we confirm that the target characteristics were achieved.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"115 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":"116099259","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/iWEM52897.2022.9993512
Chikayo Hata, N. Takemura
This paper proposes a compact planar monopole antenna for ultra-wideband (UWB) wireless communication system frequencies. The antenna consists of a half-shaped crescent-shaped monopole antenna with an electromagnetic coupling on a dielectrics substrate (FR-4) and short stub. The antenna size is 26×12×1.6mm3 and can operate in the bandwidth of UWB systems. The results of frequency-domain and time-domain analyses and the group delay characteristics confirm that the antenna is suitable for high-speed wireless communication applications.
{"title":"A Study on Miniaturization and Group Delay Characteristic of Half-Shaped UWB Monopole Antenna with Coupling Structure","authors":"Chikayo Hata, N. Takemura","doi":"10.1109/iWEM52897.2022.9993512","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993512","url":null,"abstract":"This paper proposes a compact planar monopole antenna for ultra-wideband (UWB) wireless communication system frequencies. The antenna consists of a half-shaped crescent-shaped monopole antenna with an electromagnetic coupling on a dielectrics substrate (FR-4) and short stub. The antenna size is 26×12×1.6mm3 and can operate in the bandwidth of UWB systems. The results of frequency-domain and time-domain analyses and the group delay characteristics confirm that the antenna is suitable for high-speed wireless communication applications.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"3 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":"124352719","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/iWEM52897.2022.9993544
Kwok L. Chung, Xin Cheng, Botao Feng
This paper presents a new performance metric of filtering antennas known as radiation suppression index (RSI). Researchers often use the term “high selectivity” when reporting filtering antenna designs, however, it is a descriptive term. High selectivity cannot quantify the radiation roll-off and thus, no comparison can be made with other designs. A metric of RSI based on radiation efficiency is proposed here through a design of dual-polarized filtering magnetoelectric dipole antenna. The purpose is to promote a measurement standard for RSI in such a way that the radiation roll-off rates can be (i) gauged, and (ii) compared between filtering antennas.
{"title":"Radiation Suppression Index of Filtering Antennas","authors":"Kwok L. Chung, Xin Cheng, Botao Feng","doi":"10.1109/iWEM52897.2022.9993544","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993544","url":null,"abstract":"This paper presents a new performance metric of filtering antennas known as radiation suppression index (RSI). Researchers often use the term “high selectivity” when reporting filtering antenna designs, however, it is a descriptive term. High selectivity cannot quantify the radiation roll-off and thus, no comparison can be made with other designs. A metric of RSI based on radiation efficiency is proposed here through a design of dual-polarized filtering magnetoelectric dipole antenna. The purpose is to promote a measurement standard for RSI in such a way that the radiation roll-off rates can be (i) gauged, and (ii) compared between filtering antennas.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"13 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":"122229597","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/iWEM52897.2022.9993588
Konosuke Shiba, Masaharu Takahashi
Recently, with the aging of the population and the shift from hospital-based medicine to home healthcare, IoT devices have become one of the technologies that will play an important role. It is expected that IoT devices will be used in remote medicine and utilization of medical data. However, there are various restrictions on device operation, which can be improved by wireless power transfer. In this research, we develop a transmitting antenna used for a wireless power supply system to secure power for multiple small IoT devices.
{"title":"A Study of Transmitting Devices for Wireless-Powered Small Sensors for Home Health Care","authors":"Konosuke Shiba, Masaharu Takahashi","doi":"10.1109/iWEM52897.2022.9993588","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993588","url":null,"abstract":"Recently, with the aging of the population and the shift from hospital-based medicine to home healthcare, IoT devices have become one of the technologies that will play an important role. It is expected that IoT devices will be used in remote medicine and utilization of medical data. However, there are various restrictions on device operation, which can be improved by wireless power transfer. In this research, we develop a transmitting antenna used for a wireless power supply system to secure power for multiple small IoT devices.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"67 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":"122875582","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/iWEM52897.2022.9993481
N. Tomiyama, Jo Tamura, S. Sugaya, H. Arai
Patch antennas have been drawn rich attention in wireless system because of their low-profile structure, low cost and ease of manufacture. This paper proposes a broadband and compact antenna using metasurface. The metasurface consists of an array of rectangular metal patches. The conventional antenna has bandwidth of $vert mathrm{S}11vert< -10$ dB of 2.5%, while the proposed antenna has that of 11.8%. In addition, the gaps must be set so that the metasurface is not equally spaced when they are arrayed.
{"title":"Design of broadband patch antennas using metasurfaces","authors":"N. Tomiyama, Jo Tamura, S. Sugaya, H. Arai","doi":"10.1109/iWEM52897.2022.9993481","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993481","url":null,"abstract":"Patch antennas have been drawn rich attention in wireless system because of their low-profile structure, low cost and ease of manufacture. This paper proposes a broadband and compact antenna using metasurface. The metasurface consists of an array of rectangular metal patches. The conventional antenna has bandwidth of $vert mathrm{S}11vert< -10$ dB of 2.5%, while the proposed antenna has that of 11.8%. In addition, the gaps must be set so that the metasurface is not equally spaced when they are arrayed.","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":"128454218","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/iWEM52897.2022.9993582
Tomohiro Kumaki, Satoshi Ozeki, A. Hirata, O. Kagaya
We have investigated 120-GHz-band high-speed contactless communication that enables to connect to LAN by only placing devices on the desk. We propose a 120-GHz-band waveguide whose upper part is replaced by a glass substrate on which split ring resonators (SRRs) are integrated. We prototyped a waveguide whose upper side is replaced by SRR-integrated glass substrate, and measured the transmission loss of the waveguide with the glass substrate. The transmission loss of the waveguide was about 5 dB, and 1/100 of the 120-GHz-band signal transmitted through the waveguide can be guided to the dielectric sheet in contact with the glass substrate.
{"title":"120-GHz-band Close Proximity Wireless Communication Using Metamaterial Integrated Glass Substrate","authors":"Tomohiro Kumaki, Satoshi Ozeki, A. Hirata, O. Kagaya","doi":"10.1109/iWEM52897.2022.9993582","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993582","url":null,"abstract":"We have investigated 120-GHz-band high-speed contactless communication that enables to connect to LAN by only placing devices on the desk. We propose a 120-GHz-band waveguide whose upper part is replaced by a glass substrate on which split ring resonators (SRRs) are integrated. We prototyped a waveguide whose upper side is replaced by SRR-integrated glass substrate, and measured the transmission loss of the waveguide with the glass substrate. The transmission loss of the waveguide was about 5 dB, and 1/100 of the 120-GHz-band signal transmitted through the waveguide can be guided to the dielectric sheet in contact with the glass substrate.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"19 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":"125780266","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/iWEM52897.2022.9993557
K. Itoi, H. Nakabayashi
Many models have been proposed for path loss in mobile communications. Conventionally, multiple regression analysis and theoretical formulas have been used, but in recent years, methods using machine learning have been proposed to solve these problems. We analyzed the parameters of the conventional typical propagation model and proposed to effectively merge the conventional models to predict the path loss by machine learning before. The prediction accuracy for Narashino-shi by proposed method is 4.39 dB in root mean square error (RMSE). In this report, we propose a prediction method using convolutional neural network (CNN) with only image input. For the purpose, we examined the structure of the map image input to CNN and the initial value of CNN training. The prediction accuracy 4.09 dB in RMSE was obtained.
{"title":"Basic Study of Map Image Processing for Simple Path Loss Prediction Using CNN","authors":"K. Itoi, H. Nakabayashi","doi":"10.1109/iWEM52897.2022.9993557","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993557","url":null,"abstract":"Many models have been proposed for path loss in mobile communications. Conventionally, multiple regression analysis and theoretical formulas have been used, but in recent years, methods using machine learning have been proposed to solve these problems. We analyzed the parameters of the conventional typical propagation model and proposed to effectively merge the conventional models to predict the path loss by machine learning before. The prediction accuracy for Narashino-shi by proposed method is 4.39 dB in root mean square error (RMSE). In this report, we propose a prediction method using convolutional neural network (CNN) with only image input. For the purpose, we examined the structure of the map image input to CNN and the initial value of CNN training. The prediction accuracy 4.09 dB in RMSE was obtained.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"177 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":"120972383","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/iWEM52897.2022.9993504
Hong-Jun Lin, Kai‐Ping Yang, Jui-Han Lu
A compact dual-band 8 × 8 multi-input multi-output (MIMO) antenna array for a 5G mobile communication device is proposed to have sub-6GHz operation. The impedance bandwidths across the operating bands approach the bandwidth specification of the n77/78/79 bands, respectively. The measured peak gains and antenna efficiencies are close to 3.0 dBi / 80 % and 3.8 dBi / 50 % across n77/78/79 bands, respectively. And, the measured envelope correlation coefficient (ECC) is less than 0.2 across the operating bands for this MIMO antenna array.
{"title":"A Compact Hybrid Antenna for 5G Sub-6GHz MIMO Operation","authors":"Hong-Jun Lin, Kai‐Ping Yang, Jui-Han Lu","doi":"10.1109/iWEM52897.2022.9993504","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993504","url":null,"abstract":"A compact dual-band 8 × 8 multi-input multi-output (MIMO) antenna array for a 5G mobile communication device is proposed to have sub-6GHz operation. The impedance bandwidths across the operating bands approach the bandwidth specification of the n77/78/79 bands, respectively. The measured peak gains and antenna efficiencies are close to 3.0 dBi / 80 % and 3.8 dBi / 50 % across n77/78/79 bands, respectively. And, the measured envelope correlation coefficient (ECC) is less than 0.2 across the operating bands for this MIMO antenna array.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"51 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":"130794696","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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