A microstrip line based approach for the evaluation of EBG frequency band by its CRLH/ZOR characteristics

The proposed microstrip line based approach for electromagnetic band-gap (EBG) investigation defines the band-gap through the detection of the resonant frequencies of fsh and fse, while conventional approaches of dispersion diagram calculation model, TEM waveguide model, and suspended microstrip line model directly show the band-gap. The proposed approach is based on composite right/left handed (CRLH) and zeroth-order resonator (ZOR) theories, then, the resonant frequencies fsh and fse of EBG structure can be detected by our designed microstrip line based approach. Thereafter, the band-gap of an EBG structure surface is defined as it is delimited by the two resonant frequencies. Compared to the conventional approaches, our proposed approach has many advantages, such as computer resources and time-alleviated, fast prediction of the resonant frequencies and band-gap, and easy of construction and directly measurement. The approach is validity by full wave simulations.