Design and analysis of a miniature metamaterial microstrip patch antenna

In this paper a miniature rectangular patch antenna is specifically designed and analyzed using metamaterial concepts. Based on an ordinary patch antenna, it has a double C shaped resonant structure embedded in the center of the substrate of the rectangular patch antenna. The resonant structure has a strong electric response in a certain frequency of interest, and can be used to construct metamaterials with negative permittivity. It is found the great impact on the antenna performance to modify the dimension to 58% of a conventional patch antenna. This antenna has strong radiation in the 45° to the horizontal direction for some specific applications within the sub-resonant band, and can construct a dual frequencies antenna under certain conditions. Numerical results verify that the novel antenna performance is satisfactorily.