Design and Simulation of Novel Ultra Wideband Planar Reflector Antenna

A novel ultra wideband planar reflector antenna is presented in this paper. The proposed antenna is composed of a circular disc dipole and a finite reflector plane. The impedance matching and bandwidth for the presented antenna are mainly affected by the diameter of the disc and feeding separation. The theory of ultra wideband planar reflector antenna is discussed and simulated. By properly choosing adequate dimension and adjusting feeding distance, impedance bandwidth of S11<-10dB is about from 1.7GHz to 19.8GHz, and relative bandwidth is greater than 160%. The antenna can get broad radiation beam in the low frequency band. The main lobe 3dB width is wider than 65° at E-plane and H-plane in low frequency. To increase the impedance bandwidth, a changed planar reflector antenna is proposed. The simulation and analysis results are presented.