Dual Band Dual Polarization Directive Patch Antenna Using Rectangular Metallic Grids Metamaterial
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In this letter, a kind of metamaterial superstrate based on rectangular metallic grids is presented to enhance the directivity of patch antenna at two frequency bands for two orthogonal polarizations. According to the periodic boundary condition, the influences of its important geometry parameters are investigated in detail by simulating its unit cell. It is found that the transmission peak frequency is intimately related to the size of rectangular metallic grid. Then, a dual band dual polarization patch antenna with metamaterial is studied and compared with conventional patch antenna. It is demonstrated that by introducing the proposed metamaterial superstrate, the gain of the patch antenna is improved by 9.5 dB at 14.1 GHz for x polarization and 12 dB at 15.4 GHz for y polarization, respectively.
KeywordsMetamaterial superstrate Directivity Dual band dual polarization Patch antenna
This work was supported by 973 Program of China (No.2006CB302900) and scientific innovation funding for graduates of Chinese Academy of Sciences. Authors would like to express their sincere gratitude to the CST China for providing the evaluated software for the simulation.