Dual Frequency Reconfigurable Patch Antenna for S Band Application

The mechanism of reconfiguration is important to enhance the performance of an antenna as it can switch between different frequencies in a dynamic environment. In this paper, we propose a single layer microstrip rectangular patch antenna with parallel slots to obtain two resonant frequencies. The feature of reconfigurability is attained by using PIN diode switch. The simulated antenna performs switching either in the 2.4GHz or 3.7GHz by operating PIN diode in the off or on state in a particular slot. A parametric simulation is carried out to position the slots and switches which optimize a return loss less than 10dB and a gain greater than 5dBi. The proposed design provides better gain with reconfigurable feature.