A Conformal Broadband Monopole Antenna for VHF/UHF Band Applications

This paper presents a conformal broadband monopole antenna working at very high frequency (VHF) band and ultra-high frequency (UHF) band. The proposed antenna is composed of an open ring ground and a circular monopole patch, which is fed by modified coplanar waveguide (CPW). Base on analysis of the effect of open ring ground, a broadband CPW-fed antenna is designed. Simulated results show that, with the electrical dimension of 0.25λ × 0.25λ at the minimum operation frequency, the voltage standing wave ration (VSWR) of the antenna is less than 2 from 98MHz to 622MHz (145%).