Frequency Reconfigurable Antenna Using Metamaterial Split Ring Resonators for Smart Applications

In order to use an antenna at different frequencies in a particular frequency band, a Frequency Reconfigurable Antenna design is proposed using Split Ring Resonators (SRR). It uses a Rogers RT duroid 5880 (30 × 28.4 mm2) as a substrate with a thickness of 0.508 mm. It uses a CPW feed and a metal surface at the back of substrate of same size which act as a reflector. This reflector is used to increase the gain and other characteristics of the antenna. Two PIN diodes of same size are used as switches for connecting the Split Ring Resonators. By ON/OFF the switches we get the four different modes and different resonating frequencies at those modes. It exhibits the VSWR < 2 and simulated on CST®MWS®. It resonates at four different frequencies - 5.32 GHz, 5.662 GHz, 6.469 GHz and 6.547 GHz with a maximum gain of 6.44 dBi, 7.75 dBi, 8.54 dBi and 8.39 dBi respectively.