Dual mode antenna design using split ring resonator array

In this study an array structure formed by four split ring resonators (SRR) has been used as the radiating part of the antenna. Due to the coupling between resonators placed in proper distances along the propagation direction, two mode of radiation has been shown by numerical calculations. Changing the distance between SRR couples shifts the resonance frequencies and affects return loss values associated with resonance frequencies. Calculated surface current distributions shows that each radiation mode has been caused by different SRR structures on the array structure.