Mathematical characterization of coupled Pi-shaped DNG metamaterial structure

In this paper, a coupled Pi-shaped double negative metamaterial has been validated using two established retrieval methods: Nicolson-Rose-Weir method and Transmission-Reflection Method. The proposed unit cell was designed on a Rogers RO3010 substrate with dielectric constant of 10.2 and a thickness of 1.28 mm. The simulation has been performed under commercially available CST Microwave Studio environment. The proposed structure has been achieved DNG characteristics at 7.89 GHz. The effective parameters of the proposed structure have been retrieved using MATLAB for both TR and NRW methods and compared the results.