인체 표면 통신을 위한 TM31 고차 모드 반원-링 인체 부착형 마이크로스트립 패치 안테나 설계

초록

In this paper, a TM31 higher order mode half circular-ring microstrip antenna with monopole-like radiation characteristic for on-body communication is proposed. By using shorting vias, TM31 resonance mode was excited, while achieving compact low-profile antenna with monopole-like radiation characteristics. To overcome the narrow bandwidth of a patch antenna, a C-shape half ring patch with shorting vias having TM31 mode is closely located around a half circular patch. For size reduction, half mode is adopted. The proposed antenna has the overall dimensions of 0.25 λ0×0.46 λ0×0.025 λ0 at the industrial, scientific, and medical(ISM) 2.45 GHz band(2.4～ 2.485 GHz) and the 10-dB return loss is 4.24 % ranging from 2.38 to 2.49 GHz. To verify body effect, two-thirds muscle equivalent semi solid phantom was fabricated and used to measure the antenna performance. A communication link is analysed to investigate the effect of human-body movements and antenna locations.

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