Enhancement of front-to-back ratio and gain of rectangular microstrip antenna using novel elliptical EBG structure
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This paper describes a technique to suppress the surface wave propagation modes and consequently to increase the gain of a rectangular microstrip antenna fed by a coaxial probe using a new electromagnetic band gap structure (EBG). The EBG structure consists of perforated cylindrical holes periodically distributed around the perimeter of two ellipses with different radius. The antenna design and the parametric analysis of the band gap structure and their integration are carried out. The performance of the proposed antenna using a full-wave method are presented and compared to conventional microstrip antenna operating at the same frequency. Obtained results show a gain enhancement of 1.9 dB in the E-plane.
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