Design of an Epsilon Shaped Multiband Frequency Reconfigurable Antenna for Wireless Applications

A reconfigurable multi-band radiating structure compatible for wireless applications is proposed in this paper. A simple epsilon shaped radiating structure is implemented on a FR-4 substrate. The overall size of the proposed radiating structure is $54.6 \times 41.8 \times 1.6$ mm³. Reconfigurability is accomplished using a PIN diode placed at bottom of the radiating structure. During the ON state, the proposed structure resonates at a single frequency of 7.08 GHz and during the OFF state, the structure resonates at dual band frequencies of 6.53 GHz and 8.44 GHz. The proposed structure achieves acceptable gain, VSWR, directivity and return loss at all the resonating frequencies. Its low profile and acceptable performance make the antenna well suited for wireless applications. The software used for simulation is CST (Computer Simulation Technology).