Highly integrated VO2-based antenna for frequency tunability at millimeter-wave frequencies

Abstract

We report the monolithic integration of a metal-insulator material (vanadium dioxide, VO2) for realizing a frequency tunable antenna operating around 30 GHz. The design of the device is based on a slot antenna excited by a microstrip line having a length that can be conveniently varied using a VO2-based switch. Compared to existing commercial solutions, the proposed switches show better electrical properties at high frequencies, with low losses (<;1 dB) and high isolation (>20 dB) up to 40 GHz. The simulation shows that the antenna can be tunable around 30 GHz, with discrete frequency operation while being highly integrated.