Analysis of Performance Parameters of Wearable Antenna Working near Human Body

This article uses the three-dimensional high-frequency simulation software HFSS to build a three-layer tissue model of the human body and design a microstrip patch antenna that works at 2. 45GHz. The power feeding method is microstrip line wave port feeding and is located at the midpoint of the radiation patch. The method of modeling and simulation is used to analyze the influence of human tissue on the key parameters of the microstrip antenna, and the HFSS software simulation data is exported, and the parameter curve is drawn using Matlab software. The analysis results show that when the microstrip patch antenna changes from a free space environment to a human surrounding environment, the center frequency of the low frequency band hardly shifts, but the return loss value increases significantly, and the voltage standing wave ratio occurs significantly Change and appear mismatch phenomenon, the radiation resistance and capacitive reactance in the input impedance both increase, and finally the total gain of the antenna decreases.