Investigation of gain effect of multi-band patch antenna based on composite rectangular SRRs

The paper focus on describing the important influence and physical law of the Split_Resonant_Rings (SRRs) based on Left Handed Material (LHM) on patch antennas. The FDTD method, together with FEM method is used to study the characteristics of patch antenna based on composite rectangular SRRs. A novel composite rectangular SRR system is formed by assembling the conventional patch antenna and SRRs, it is found that electromagnetic wave resonance occurs at several bands: GSM (880–960 MHz), DCS (1710–1881 MHz), and PCS (1850–1990 MHz). The electromagnetic wave's “tunnel effect” and evanescent waves’ enhancing effect are formed, which can improve the localization extent of electromagnetic wave's energy apparently, such effects can improve the antenna's radiation gain and its matching condition. The phenomenon indicates that such composite rectangular patch antennas are promising in wireless communications such as mobile phone, satellite communication and aviation.