Design a Frequency Reconfigurable Microstrip Patch Antenna for Satellite Communication

Abstract

A novel reconfigurable patch antenna with four diode switches for multi band applications is presented. The dual resonant mode of reconfigurable patch antenna is simulated by transmission line feeding. By varying the diode switching conditions of the patch, the resonant frequencies are varied. The reconfigurable patch has operating frequency of 18.50 GHz with return loss -17.80 dB, other resonant frequencies are 18.90GHz, 19.5GHz, 21.10GHz with return loss -20.77dB, -18.57dB, -14.29dB respectively. The simulated antenna has high radiation efficiency and good performance. The radiation patterns for resonance bands are realized at is 00 and is 900 in xz and yz plane. The co and cross polarization has been imparted and cross polarization is found below 20 dB at each angle of one plane and operating frequency. The simulation results have good consistency.