Measurement and Countermeasure Methodologies to Deal with Broadening Unnecessary Radio Wave

Masahiro YAMAGUCHI  Satoshi TANAKA  Shigeyoshi YOSHIDA  Kazushi ISHIYAMA  Makoto NAGATA  Koichi KONDO  Yasuyuki OKIYONEDA  Mitsuharu SATO  Yasunori MIYAZAWA  Kensuke HATAKEYAMA  

B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)   Vol.J101-B   No.3   pp.204-211
Publication Date: 2018/03/01
Online ISSN: 1881-0209
Type of Manuscript: INVITED PAPER (Special Section on EMC Technology to Support E-systems (Electric, Electronic, Electromagnetic and Information System))
unnecessary radio wave,  mobile communication,  switching equipment,  wireless power transmission,  magnetic material,  magneto-optical probe,  HILS type mobile communication performance evaluation system,  

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Coming wireless systems such as the fifth generation mobile communication system and switching equipment using SiC, GaN, etc. are being densely installed, where unnecessary radio waves and carrier frequency bandwidth are both broadening. In order to contribute to the technology for reliable sharing of these different systems at busy frequencies from 700 MHz to 6 GHz, this paper systematically explains our R&D results on the technologies to improve immunity of mobile receiver against unnecessary radio waves, to suppress emitting noise at inverters as noise source and conductive propagation hardware, and to measure and evaluate quantitatively and highly accurately the effect of these noise control technologies.