Design of a novel ultra-wideband antenna applied for Life detecting

Abstract

This paper introduces a novel antipodal tapered slot antenna based on the ultra-wideband characteristics of life detection radar. The antenna adopts edge comb-structure to improve the radiation field and uses the feeding of modified micro-strip line to slot line to solve the impedance matching problem of ultra-wideband antenna. The antenna is fabricated on F4B high-frequency board with the thickness of 1.5mm, and the size of the antenna is only 150mm×135mm. The measured results show that VSWR is lower than 2 in the operation frequency band of 900MHz to 5GHz, and the antenna gain is greater than 20dBi. The measured radiation patterns on E-plane and H-plane agree well with the simulated results.