Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993495
Taiga Wakabayashi, N. Ishii, Masaharu Takahashi, Qiang Chen
To study the electromagnetic field distribution in air-sea two-layer problem for a 10 kHz band undersea location estimation, a 100 MHz band transmitter-receiver experimental setup is constructed in our laboratory using the pseudo-scale model and the electromagnetic field distribution is measured. The received power distribution when the transmitting antenna is placed on the liquid surface and the receiving antenna is scanned underwater is a good agreement with FDTD simulation results, confirming that the measurement is possible even in locations with low receiving strength, including lateral waves.
{"title":"An Experimental System Based on Pseudo-Scale Model of Air-Sea Two-Layer Problem Operated at 100 MHz","authors":"Taiga Wakabayashi, N. Ishii, Masaharu Takahashi, Qiang Chen","doi":"10.1109/iWEM52897.2022.9993495","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993495","url":null,"abstract":"To study the electromagnetic field distribution in air-sea two-layer problem for a 10 kHz band undersea location estimation, a 100 MHz band transmitter-receiver experimental setup is constructed in our laboratory using the pseudo-scale model and the electromagnetic field distribution is measured. The received power distribution when the transmitting antenna is placed on the liquid surface and the receiving antenna is scanned underwater is a good agreement with FDTD simulation results, confirming that the measurement is possible even in locations with low receiving strength, including lateral waves.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"69 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":"127254161","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/iWEM52897.2022.9993556
Yuto Sekino, K. Honda
To ensure the success of upcoming car-to-car networks, the in-vehicle antenna system must adapt to the variation of the radio-wave propagation environment depending on the dynamic motion of a car. In this study, we present a 4×4 multiple-input multiple-output antenna that utilizes not only the circular phased array technology but also the weight-polarization control function. The experimental results reveal that the directivity of the proposed antenna adjusts to the characteristics of the incident wave by the optimized weight function.
{"title":"Directivity Measurement of a Weight-Polarized Beam-Steering MIMO Antenna with a Circular Phased Array","authors":"Yuto Sekino, K. Honda","doi":"10.1109/iWEM52897.2022.9993556","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993556","url":null,"abstract":"To ensure the success of upcoming car-to-car networks, the in-vehicle antenna system must adapt to the variation of the radio-wave propagation environment depending on the dynamic motion of a car. In this study, we present a 4×4 multiple-input multiple-output antenna that utilizes not only the circular phased array technology but also the weight-polarization control function. The experimental results reveal that the directivity of the proposed antenna adjusts to the characteristics of the incident wave by the optimized weight function.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"25 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":"124915581","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/iWEM52897.2022.9993567
Kangtai Zheng, Jimhong He, Kwok L. Chung, G. Lai, Yingsong Li, Botao Feng
This paper introduces a composite microstrip-CPW transmission line that owns a unique feature of dual signal-path. The dispersive characteristic impedance of the composite line is revealed here and a design example of a miniature 2-way power divider is demonstrated by using the zigzag lines. A size reduction factor of 87% and a bandwidth of 57.4% are achieved and validated with experiment.
{"title":"Miniaturization of Wilkinson Power Divider Using Zigzag Combination of Microstrip and CPW Lines","authors":"Kangtai Zheng, Jimhong He, Kwok L. Chung, G. Lai, Yingsong Li, Botao Feng","doi":"10.1109/iWEM52897.2022.9993567","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993567","url":null,"abstract":"This paper introduces a composite microstrip-CPW transmission line that owns a unique feature of dual signal-path. The dispersive characteristic impedance of the composite line is revealed here and a design example of a miniature 2-way power divider is demonstrated by using the zigzag lines. A size reduction factor of 87% and a bandwidth of 57.4% are achieved and validated with experiment.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"79 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":"126172218","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/iWEM52897.2022.9993614
Yusuke Kaimori, S. Makino, Masayoshi Takao
By combining the characteristics of a reflectarray antenna to change the beam direction according to the frequency and polarization, conventional multi-spot and multi-scanning beams using a single reflector have been proposed. We have previously shown the design method and analysis results of scanning spot beams whose beam direction is changed by frequency in the elevation direction and by polarization in the Azimuth direction. In this study, the measurement results of the scanning spot beam reflectarray antenna fabricated from the designed values are presented.
{"title":"Scanning Spot Beam Reflectarray Antenna Study","authors":"Yusuke Kaimori, S. Makino, Masayoshi Takao","doi":"10.1109/iWEM52897.2022.9993614","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993614","url":null,"abstract":"By combining the characteristics of a reflectarray antenna to change the beam direction according to the frequency and polarization, conventional multi-spot and multi-scanning beams using a single reflector have been proposed. We have previously shown the design method and analysis results of scanning spot beams whose beam direction is changed by frequency in the elevation direction and by polarization in the Azimuth direction. In this study, the measurement results of the scanning spot beam reflectarray antenna fabricated from the designed values are presented.","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":"128215744","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/iWEM52897.2022.9993550
Takuji Nishikawa, T. Hikage, M. Yamamoto
This study aims to develop a method to evaluate the electromagnetic interference (EMI) characteristics of implantable medical devices (implantable cardiac pacemakers/implantable cardioverter-defibrillators) with respect to various radio wave-using devices using electromagnetic field simulation. In this paper, the relationship between EMI characteristics of implantable medical devices and RF frequencies under near-field and far-field exposure conditions was investigated through numerical simulations. As a numerical model, an implantable pacemaker embedded in a human phantom used in the EMI evaluation test is prepared, and the AIMD-EMI characteristics near the transmitter in the 4G and 5G Sub6 frequency bands are analyzed by electromagnetic field simulation based on the finite element method.
{"title":"Using FEM Simulation to Estimation of Active Implantable Medical Device EMI Characteristic in the 4G and 5G Sub-6 Frequency Bands","authors":"Takuji Nishikawa, T. Hikage, M. Yamamoto","doi":"10.1109/iWEM52897.2022.9993550","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993550","url":null,"abstract":"This study aims to develop a method to evaluate the electromagnetic interference (EMI) characteristics of implantable medical devices (implantable cardiac pacemakers/implantable cardioverter-defibrillators) with respect to various radio wave-using devices using electromagnetic field simulation. In this paper, the relationship between EMI characteristics of implantable medical devices and RF frequencies under near-field and far-field exposure conditions was investigated through numerical simulations. As a numerical model, an implantable pacemaker embedded in a human phantom used in the EMI evaluation test is prepared, and the AIMD-EMI characteristics near the transmitter in the 4G and 5G Sub6 frequency bands are analyzed by electromagnetic field simulation based on the finite element method.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"7 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":"123974304","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/iWEM52897.2022.9993555
Y. Rikuta, Akira Maruyama, Hiroki Hagiwara
In a wireless environment where radio waves are transmitted and received, the location and size of the communication area and dead zone may change depending on the passage of time and various conditions. To improve the wireless area, using a meta-surface reflector which reflect the radio waves to the coverage hole is considered. In this paper, a 2.45GHz band meta-surface reflector was proposed. The reflection angle of this reflector can be dynamically controlled by designing a unit cell configuration which change the reflection phase.
{"title":"A Study on Controlling the Direction of the Scattering Pattern on Meta-Surface Reflector","authors":"Y. Rikuta, Akira Maruyama, Hiroki Hagiwara","doi":"10.1109/iWEM52897.2022.9993555","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993555","url":null,"abstract":"In a wireless environment where radio waves are transmitted and received, the location and size of the communication area and dead zone may change depending on the passage of time and various conditions. To improve the wireless area, using a meta-surface reflector which reflect the radio waves to the coverage hole is considered. In this paper, a 2.45GHz band meta-surface reflector was proposed. The reflection angle of this reflector can be dynamically controlled by designing a unit cell configuration which change the reflection phase.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"359 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":"124525039","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/iWEM52897.2022.9993474
Yuji Komatsuya, T. Imai, M. Hirose
In recent years, the frequency used in wireless systems has got higher significantly, and the importance of predicting rainfall attenuation has increased. We proposed a rain attenuation prediction method by deep learning which inputs rainfall rate and path distance, and conducted prediction. As the results, we thought this proposal is promising.
{"title":"A Study of Rain Attenuation Prediction Method by Deep Learning","authors":"Yuji Komatsuya, T. Imai, M. Hirose","doi":"10.1109/iWEM52897.2022.9993474","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993474","url":null,"abstract":"In recent years, the frequency used in wireless systems has got higher significantly, and the importance of predicting rainfall attenuation has increased. We proposed a rain attenuation prediction method by deep learning which inputs rainfall rate and path distance, and conducted prediction. As the results, we thought this proposal is promising.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"6 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":"130979928","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/iWEM52897.2022.9993610
Keith Sekiya, N. Ishii, Y. Shimizu, T. Nagaoka
Since information devices using high-frequency bands for 5G are expected to be widely used, there is an assessment method focusing on the specific absorption rate (SAR) as a conformity assessment method to ensure the safety of electromagnetic waves to the human body. This conformity assessment should be extended to frequencies below 6 GHz, referred to as sub-6 of 5G. In this paper, we experimentally confirm that the near-field gain of a dipole antenna can be estimated in pure water at 6 GHz for the purpose of realizing SAR probe calibration. Furthermore, these experimental results are compared with numerical results using the method of moments developed by Richmond.
{"title":"Experimental and Numerical Study of Near-Field Gain of an Underwater Dipole Antenna at 6 GHz","authors":"Keith Sekiya, N. Ishii, Y. Shimizu, T. Nagaoka","doi":"10.1109/iWEM52897.2022.9993610","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993610","url":null,"abstract":"Since information devices using high-frequency bands for 5G are expected to be widely used, there is an assessment method focusing on the specific absorption rate (SAR) as a conformity assessment method to ensure the safety of electromagnetic waves to the human body. This conformity assessment should be extended to frequencies below 6 GHz, referred to as sub-6 of 5G. In this paper, we experimentally confirm that the near-field gain of a dipole antenna can be estimated in pure water at 6 GHz for the purpose of realizing SAR probe calibration. Furthermore, these experimental results are compared with numerical results using the method of moments developed by Richmond.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"113 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":"124116023","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/iWEM52897.2022.9993516
Saou‐Wen Su
A very compact and small, printed notebook antenna using an in-series chip inductor for achieving miniaturization for 2.4/5 and 6 GHz Wi-Fi 6E operation is introduced. The antenna consists of a coupling strip and a parasitic strip embedded with a chip inductor. The coupling strip can produce a wideband, covering the 5 GHz (5150–5825 MHz) and the new 6 GHz (5925–7125 MHz) bands. The inductor largely decreases the required resonant path for the 2.4 GHz (2400–2484 MHz) band. The design occupies a footprint of 5 mm × 10 mm (0.04-λ ×0.08-λ at 2.4 GHz), which may be the smallest notebook antennas in the recent published works. In addition, compared with the previous study in [1], the size reduction reaches more than 30% in this work with the in-series inductor.
介绍了一种非常紧凑和小型的印刷笔记本天线，采用串联芯片电感器实现2.4/5和6 GHz Wi-Fi 6E操作的小型化。该天线由一个耦合带和一个嵌有芯片电感的寄生带组成。耦合带可以产生一个宽带，覆盖5ghz (5150-5825 MHz)和新的6ghz (5925-7125 MHz)频段。该电感器大大降低了2.4 GHz (2400-2484 MHz)频段所需的谐振路径。该设计占地面积为5 mm × 10 mm (0.04-λ ×0.08-λ at 2.4 GHz)，这可能是最近发表的作品中最小的笔记本天线。此外，与之前的研究[1]相比，采用串联电感的本工作尺寸减小了30%以上。
{"title":"Miniaturized, Wi-Fi 6E Notebook Antenna Using an In-Series Chip Inductor","authors":"Saou‐Wen Su","doi":"10.1109/iWEM52897.2022.9993516","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993516","url":null,"abstract":"A very compact and small, printed notebook antenna using an in-series chip inductor for achieving miniaturization for 2.4/5 and 6 GHz Wi-Fi 6E operation is introduced. The antenna consists of a coupling strip and a parasitic strip embedded with a chip inductor. The coupling strip can produce a wideband, covering the 5 GHz (5150–5825 MHz) and the new 6 GHz (5925–7125 MHz) bands. The inductor largely decreases the required resonant path for the 2.4 GHz (2400–2484 MHz) band. The design occupies a footprint of 5 mm × 10 mm (0.04-λ ×0.08-λ at 2.4 GHz), which may be the smallest notebook antennas in the recent published works. In addition, compared with the previous study in [1], the size reduction reaches more than 30% in this work with the in-series inductor.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"5 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":"124279071","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/iWEM52897.2022.9993613
Takaharu Nakase, Yusuke Mitsui, H. Arai
This paper presents reduction of sampling points in Over the Air (OTA) test. Recently, due to the miniaturization and sophistication, OTA test conduct. It is problematic to take a lot of measurement time because of entirely spherical scanning. This paper clarifies suitable far field measurement method to reduce sampling points by introducing three far field measurement methods such as equi-angle method, modified equi-angle method and generalized spiral method. The Total Radiated Power (TRP) and Effective Isotropic Radiated Power (EIRP) values of the equi-angle method and modified equi-angle method are changed by sampling parameters and antenna patterns. However, the values of generalized spiral method are constant regardless of selected angle, and it is confirmed that around 100 points are sufficient for estimating the TRP and EIRP.
本文提出了OTA (Over the Air)测试中采样点的减少方法。近年来，由于小型化和精密化，OTA测试日益盛行。由于全球面扫描，测量时间长是有问题的。本文通过介绍等角法、修正等角法和广义螺旋法等三种远场测量方法，阐明了减少采样点的合适远场测量方法。等角法和改进等角法的总辐射功率(TRP)和有效各向同性辐射功率(EIRP)值随采样参数和天线方向图的变化而变化。但无论选择何种角度，广义螺旋法的值都是恒定的，并且证实100点左右就足以估计TRP和EIRP。
{"title":"Sampling Points Reduction in Over The Air","authors":"Takaharu Nakase, Yusuke Mitsui, H. Arai","doi":"10.1109/iWEM52897.2022.9993613","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993613","url":null,"abstract":"This paper presents reduction of sampling points in Over the Air (OTA) test. Recently, due to the miniaturization and sophistication, OTA test conduct. It is problematic to take a lot of measurement time because of entirely spherical scanning. This paper clarifies suitable far field measurement method to reduce sampling points by introducing three far field measurement methods such as equi-angle method, modified equi-angle method and generalized spiral method. The Total Radiated Power (TRP) and Effective Isotropic Radiated Power (EIRP) values of the equi-angle method and modified equi-angle method are changed by sampling parameters and antenna patterns. However, the values of generalized spiral method are constant regardless of selected angle, and it is confirmed that around 100 points are sufficient for estimating the TRP and EIRP.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"59 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":"124064614","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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