인체 부착형 소형 다이버시티 안테나

Abstract

In this thesis, a miniaturized and high-isolation diversity antenna for wearable WBAN applications is proposed to improve performance and overcome multipath fading. To achieve miniaturization an inverted-F antenna was used. The dimension of the proposed diversity antenna is 30 mm × 30 mm × 2.5 mm. The antenna performance on the human body phantom is analyzed through simulation, and the performance of the fabricated antenna is verified by comparing the measured data with that of the simulation when the antenna is placed on a semi-solid flat phantom with equivalent electrical properties of a human body. The fabricated antenna has an 10 dB return loss bandwidth over the ISM band from 2.35 GHz to 2.71 GHz and isolation is less than - 28 dB at 2.45 GHz. The measured peak gain of antenna elements # 1 and # 2 are - 0.43 dBi and – 0.54 dBi. And measured specific absorption ratio (SAR) values of the antenna # 1 and # 2 are 0.841 W/kg and 0.655 W/kg (1 g tissue) and performance parameters such as envelope correlation coefficient (ECC), mean effective gain (MEG), and the MEG ratio are analyzed.