A study on frequency reconifiguration of microstrip slot antennas using PIN diodes

In this paper, a frequency reconfigurable microstrip slot antenna for S and C band of microwave application is presented. The frequency reconfiguration is achieved due to the change of current distribution on the ground plane of microstrip slot antenna. Thus, RF PIN Diode is used as switching device to change slot length for altering current distribution on the ground plane. Two rectangular slots of total size 260 mm
²
are cut on the ground plane for positioning PIN diodes. The proposed reconfigurable antenna is designed to reconfigure in twelve number of frequency bands between frequency 2 GHz and 6.28 GHz. Here all the simulated radiation patterns and return loss graphs are acceptable for microwave applications. Moreover, the frequency reconfigurable antenna presented here reduces the size of front end system and also able to offer pre-filtering at receiving end.