A Simple Probe-fed Ultrawideband Patch Antenna with Annular Gap

Abstract

In this paper, a simple and single-layer probe-fed ul-trawideband (UWB) microstrip patch antenna with an annular gap at the X band and Ku band is proposed. The annular gap is used to compensate for the inductance caused by the probe-fed by introducing a capacitor value. The influence of antenna parame-ters on performance is analyzed thoroughly. Prototypes are de-signed, simulated, fabricated, and measured to verify the proposed UWB patch antenna. The simulated and measured results demon-strate that the proposed UWB patch antenna possesses the merit of wide operating bandwidth (up to 52%), and the maximum and minimum gains are 7.44 dBi at 9.19 GHz and 3.5 dBi at 13.06 GHz, respectively, which provides a foundation for the applications in broadband scenarios.