An epsilon negative metamaterial antenna with extended bandwidth

In this paper, a design and simulation study of a new epsilon-negative metamaterial antenna consisting of a squared shaped complementary split ring resonator (CSRR), shorting via and a stub is presented. The antenna resonates at 2.95 GHz with impedance bandwidth of 17.5%. The overall size of the antenna is 0.36λ_o × 0.33λ_o with the size of the main antenna radiating element of 0.15λ_o × 0.15λ_o at 2.95 GHz. A prototype has been fabricated and tested to validate the design. Peak realized gain of 2.19 dBi is obtained at resonance frequency. Simulated and measured results are presented and compared.