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2017 IEEE International Conference on Computational Electromagnetics (ICCEM)最新文献

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FDTD analysis of indoor propagation characteristics for improvement of wireless transmission by active propagation control FDTD分析室内传播特性，通过主动传播控制改进无线传输
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912815
R. Araki, H. Iwai, H. Sasaoka
{"title":"FDTD analysis of indoor propagation characteristics for improvement of wireless transmission by active propagation control","authors":"R. Araki, H. Iwai, H. Sasaoka","doi":"10.1109/COMPEM.2017.7912815","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912815","url":null,"abstract":"The authors have proposed “Active Propagation Control” (APC) as a method to improve receiving transmission performance of a wireless communication channel. We can obtain better transmission performance by changing propagation characteristics actively by the method. In this paper, we analyze indoor propagation characteristics by using the three-dimensional FDTD method. Also, we perform indoor experiments to verify the predicted result by the FDTD calculation.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130003329","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
Numerical evaluation by reciprocity in dielectric gratings 介质光栅互易的数值计算
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912763
Hideaki Wakabayashi, M. Asai, J. Yamakita
{"title":"Numerical evaluation by reciprocity in dielectric gratings","authors":"Hideaki Wakabayashi, M. Asai, J. Yamakita","doi":"10.1109/COMPEM.2017.7912763","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912763","url":null,"abstract":"In the theory of gratings, a numerical diffraction solution must be satisfy the energy balance and the reciprocity. The matrix eigenvalues method has been presented to study the diffraction by dielectric gratings. In the method, the error of energy balance always becomes zero except for rounding error. An accuracy criterion of a solution is left as a difficult problem. This paper shows the reciprocity for the diffraction efficiencies of the reflected and transmitted waves, numericaffy. It is suggested that the reciprocity can be used the criterion.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131186517","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
Effects of building shapes on path loss up to 37 GHz band in street microcell environments 街道微基站环境中建筑形状对高达37ghz频段路径损耗的影响
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912782
M. Inomata, M. Sasaki, W. Yamada, Y. Takatori, K. Kitao, T. Imai
{"title":"Effects of building shapes on path loss up to 37 GHz band in street microcell environments","authors":"M. Inomata, M. Sasaki, W. Yamada, Y. Takatori, K. Kitao, T. Imai","doi":"10.1109/COMPEM.2017.7912782","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912782","url":null,"abstract":"Measurement results of path loss characteristics up to 37 GHz band in street microcell environments are described. Ray tracing is used to analyze the effects of building shapes on path loss characteristics at an intersection. A comparison between measured and calculated results clarified the dominant paths in which specular reflection from a chamfered shaped building contributes the power. The results show that the median prediction error value ranged from about 4.1 to 7.0 dB for bands between 2.2 and 37.1 GHz. This confirms that the building shapes significantly affect the path loss characteristics in NLOS street microcell environments.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132562872","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
Azimuth characteristics of radio wave propagation in a mulberry farm in 920-MHz band 920mhz频段桑树农场无线电波传播的方位角特性
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912821
T. Nishimura, R. Yoshimura, C. Yamada, H. Shimasaki, Y. Kado, M. Ichida
{"title":"Azimuth characteristics of radio wave propagation in a mulberry farm in 920-MHz band","authors":"T. Nishimura, R. Yoshimura, C. Yamada, H. Shimasaki, Y. Kado, M. Ichida","doi":"10.1109/COMPEM.2017.7912821","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912821","url":null,"abstract":"Data collection of the radio wave propagation loss in farm fields is valuable to design a wireless network in a farm. They are used in calculating the link budget to establish a proper and efficient node arrangement. In this study, propagation losses in a 50 × 50 m mulberry field were measured in 920-MHz band with respect to the azimuthal angle of the propagation direction to arrays of bushes. Received signal strength indicators (RSSIs) were measured and they were converted to the path loss. Antennas were placed at a height of 1.5 m while the height of the bush was 3.5 m. Moreover, horizontal and vertical polarizations were measured. The results revealed that the horizontal polarization could be less affected by the direction angle to the ridges than the vertical polarization. These data would be useful for the evaluation of link budgets to design wireless networks in a farm.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114979629","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
Statistical analysis method of radio propagation path loss for gas-smart meters in a built-up area based on large-scale FDTD simulation 基于大规模时域有限差分仿真的建筑小区燃气智能仪表无线电传播路径损耗统计分析方法
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912784
M. Shirafune, T. Hikage, Kazuki Shindo, S. Narahashi, T. Nojima, Sota Tsuchiya, T. Kawata
{"title":"Statistical analysis method of radio propagation path loss for gas-smart meters in a built-up area based on large-scale FDTD simulation","authors":"M. Shirafune, T. Hikage, Kazuki Shindo, S. Narahashi, T. Nojima, Sota Tsuchiya, T. Kawata","doi":"10.1109/COMPEM.2017.7912784","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912784","url":null,"abstract":"This paper presents a large-scale Finite-Difference Time-Domain (FDTD) simulation as a prediction method for radio propagation characteristics for multi-hop communication of gas-smart meters in a built-up area. The frequency bands used in the simulations is 920 MHz-bands. By using the FDTD method to obtain precise and comprehensive results in multi-reflective environment, wave propagation from the gas-smart meters are observed and path loss characteristics are estimated statistically. Obtained larger path loss for the gas-smart meter in the built-up area compared with other propagation model, such as cellular communication, was more noticeable, and it is important for these effects need to be considered in the wireless link planning.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128535287","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
Acceleration methods for shielding current analysis in cracked superconducting film 裂纹超导膜中屏蔽电流分析的加速方法
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912734
A. Kamitani, T. Takayama, A. Saitoh
{"title":"Acceleration methods for shielding current analysis in cracked superconducting film","authors":"A. Kamitani, T. Takayama, A. Saitoh","doi":"10.1109/COMPEM.2017.7912734","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912734","url":null,"abstract":"Two methods are proposed for accelerating the shielding current analysis in a cracked superconducting film: fast matrix-vector multiplication by the H-matrix method and variable reduction by the QR factorization. Both methods are implemented in a numerical code for calculating the time evolution of the shielding current density. By using the code, the performance of both methods are numerically investigated. The results of computations show that, when combined with the H-matrix method, the variable reduction shows a remarkable speedup effect.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134490138","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 plane wave source for the 3D-FDTD simulation of dispersive layered media 用于色散层状介质三维时域有限差分模拟的简单平面波源
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912773
Youngjoon Lim, Hoyeol Kim, S. Nam
{"title":"A simple plane wave source for the 3D-FDTD simulation of dispersive layered media","authors":"Youngjoon Lim, Hoyeol Kim, S. Nam","doi":"10.1109/COMPEM.2017.7912773","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912773","url":null,"abstract":"In this paper, a simple and efficient plane wave excitation method for 3-D finite-difference time-domain simulation of dispersive layered media is proposed. A 1-D auxiliary simulation and total-field/scattered-field method are used with closed boundary to introduce the plane wave. The total-field/scattered-field simulation with closed boundary makes the near-field to far-field transformation possible. Stored 1-D auxiliary simulation data file can be used in iterative simulations of same geometry without repetition of same 1-D simulations.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133107400","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
Coverage area of passive bistatic radar using DTTB signal delays 无源双基地雷达使用DTTB信号延迟的覆盖面积
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912847
J. Honda, T. Otsuyama
{"title":"Coverage area of passive bistatic radar using DTTB signal delays","authors":"J. Honda, T. Otsuyama","doi":"10.1109/COMPEM.2017.7912847","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912847","url":null,"abstract":"This paper is concerned with the coverage area of the passive surveillance system which uses signal delays of digital terrestrial television broadcasting (DTTB). We have started the feasibility study of the multi-static primary surveillance radar (MSPSR) which is expected as the conventional primary surveillance radar alternative. A strong point of the MSPSR is to select some signal sources, such as DTTB, FM, 3G/LTE and so on. Among them, the DTTB is the most expected promising source because it is always present and has relatively high output powers. In this study, we proposed the passive surveillance system employing the DTTB signal delays. In this paper, the coverage area of the proposed system around Tokyo International Airport is discussed in comparison with the ADS-B data.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121974659","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
A new passive RFID tag system by dual excitation port antenna and frequency doubler 采用双激励端口天线和倍频器的新型无源RFID标签系统
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912735
S. Komatsu, T. Kodera
{"title":"A new passive RFID tag system by dual excitation port antenna and frequency doubler","authors":"S. Komatsu, T. Kodera","doi":"10.1109/COMPEM.2017.7912735","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912735","url":null,"abstract":"RFID systems is widely utilized for various distribution system for rapid and correct object transportation. In this paper, a new RFID tag consisting of an antenna with dual excitation ports and frequency doubler is proposed. In order to establish the whole system, additonal horn pair operating f0 and 2f0 are required, where the identification condition depends on frequency, transmit/receive antenna directional off-set and polarisation shift. As a proof of concept, system operation of 3–6 GHz is confirmed.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126401676","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
Planar monopole antenna with triple-band operation for LTE/WLAN MIMO system 用于LTE/WLAN MIMO系统的三波段平面单极天线
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-01 DOI: 10.1109/COMPEM.2017.7912751
Jui-Han Lu, Hai-Ming Chin, Zi-Wen Lin
{"title":"Planar monopole antenna with triple-band operation for LTE/WLAN MIMO system","authors":"Jui-Han Lu, Hai-Ming Chin, Zi-Wen Lin","doi":"10.1109/COMPEM.2017.7912751","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912751","url":null,"abstract":"A novel triple-band design of planar MIMO monopole antenna for LTE / WLAN system is proposed. With the use of inverted S- and L-shaped monopole strips accompanying the antenna, multi-resonant modes close to 2.5 / 3.5 / 5.5 GHz bands are excited to meet the specifications of LTE /WLAN system. The obtained impedance bandwidth across the operating bands can reach about 1460 / 848 MHz for the 2.5 / 3.5 / 5.5 GHz bands, respectively. Our model can develop the compact operation with more than 15 % antenna size reduction for suitably embedding into the portable devices as overall antenna dimension is only set to 20 × 15 mm2. The measured peak gains and radiation efficiencies are about 3.1 / 4.0 / 4.4 dBi and 84 / 75 / 82 % for the 2.5 / 3.5 / 5.5 GHz band, respectively, with nearly omni-directional pattern in the XY-plane.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128921063","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
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