An ultra broadband stacked circular patch antenna

A stacked, three layer circular antenna is presented here which has ultra wide band radiation characteristic. In order to achieve wide bandwidth, proximity coupled circular patches with dual probe feed is used. The resonator parameters are optimized in order to achieve ultra wide band characteristics. Few optimization results are also presented. Return loss, radiation pattern and VSWR over frequency range 1 GHz - 30 GHz is presented for the best antenna.