A Reconfigurable Miniaturized Spiral Monopole Antenna for TV White Spaces

摘要

This paper presents a novel design of a reconfigurable miniaturized planar spiral monopole antenna suitable for TVWS applications. The proposed antenna is designed on a FR4 epoxy substrate fed by a microstrip line over a partial ground plane. This antenna, designed for the high frequency of the UHF band (600-800 MHz), operates with 1 dB transmission gain. By inserting a tunable inductor on the spiral monople and modifying its inductance, frequency reconfigurability is attained, and the antenna can operate at different bands in the 600-800 MHz range. These bands range between 15 to 20 MHz which is suitable for TVWS applications.