Metamaterial lens incorporated enhanced gain omnidirectional conformal patch antenna

The paper aims at improving the radiation efficiency and enhancing the gain of a Conformal Patch Antenna (CPA). It evaluates the performance of the CPA in terms of various metrics viz. efficiency, gain, directivity, main lobe level, power radiation level and bandwidth. In order to enhance these parameters, Metamaterial (MMs) is used as a uniform flat lens in front of designed CPAs. The paper demonstrates simulation results of CPA which is designed at 3.5 GHz. This frequency band is popularly used for Worldwide Interoperability for Microwave Access (WiMAX) (over 802.16e). The performance evaluation of CPA with and without the meta-material lens is illustrated. Incorporation of MM lens along with CPA improves the gain with 2.44dB (75.388%), directivity with 1.863 dBi (53.568%) and bandwidth (0.71%). It also strengthens the main lobe level and improves the power radiation (0.82031 W, 12.113%). Hence, the results delineates improvement in efficiency of the antenna system by 11.869%.