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Won Gook Hong,Naobumi Michishita,Yoshihide Yamada 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
To expand the applicability of the RFID, UHF tags for metal plate use were studying. The low-profile, small, normal-mode helical antenna (NMHA) that can be used on metallic plates was developed. The antenna size was very small such as 0.05 wavelengths. Excellent read range was ensured. However, the impedance matching tap structure was not sufficiently small. This paper developed a simple impedance matching structure by replacing the feed point to the end of the NMHA. First of all, the impedance transform characteristics of the feed point shift were shown. Next, some impedance matching structures for IC chips were clarified. It was shown that 0.7㏈d antenna gain was achieved by the 0.05 wavelength size antenna. Moreover, through the measurement results of read ranges, comparable read ranges to the commercial metal proximity type tags could be achieved by the developed NMHA.
Literature Review on Recent Magnetocardiography and Impedance-MagnetocardiographyTechnologies
Y. Seki,A. Tsukamoto,K. Tsukada,Hitoshi Horigome,Miki Yokokawa,Yoshihide Chiba,Kimio Tanaka,A. Kandori,T. Miyashita,K. Ogata,D. Suzuki,K. Saito,K. Yokosawa,Satsuki Yamada,Shigeyuki Watanabe,Iwao Yamag 한국초전도학회 2006 Progress in superconductivity Vol.8 No.1