earticle

영어

This paper presents design and analysis of a novel S-shaped left-handed material based on the equivalent circuit theory. The effective permittivity and effective permeability of the novel S-shaped left-handed material are both negative in the range from 5GHz to 7GHz. A conventional microstrip antenna is designed following the empirical formula, and a high gain microstrip antenna is designed with use of the novel S-shaped left- handed materials. The performances of the conventional antenna and the modified antenna are simulated by HFSS software. The simulation results show that the gain of the antenna increased by 3.94dB, and the half power beam width decreased by 38.9°. Therefore, it is concluded that the performance of microstrip antenna can be improved by using left-handed materials.