Design of Wideband Patch Antenna for Microwave Imaging Systems

In this letter, we propose a wideband patch antenna for the head imaging systems. It is composed of a patch and the ground, and both structure are largely token off in comparison with normal patch antenna. By analyzing the structure of this antenna, we could obtain the band is mainly controlled by three parameters. Extensive simulations demonstrate that patch antenna provides wideband operation with -10 dB bandwidths of 71.1% at the frequency of 1.23 - 2.63 GHz. Moreover, the radiation patterns are almost the bi-directional and the gains are all above 3 dBi at entire operation frequencies.