volume | PIER Journals

Abstract

In this paper, a ray-tracing based mathematical model is proposed for the analysis and design of Fabry-Perot antennas with a nonuniform Partially Reflecting Surface (PRS). The use of nonuniform PRS in FPA's has recently gained attention due to its immense applications such as directivity enhancement and beam-steering. A spatially varying phase profile of the PRS is achieved by the arrangement of various distinct unit cells throughout the surface. The PRS phase and magnitude variation enables the alteration of wavefronts to achieve beam steering along a desired polar and azimuth angle (θ, Φ). Thus, a simple, robust and computationally efficient model to find the optimal FPA parameters and phase profiles for beam-steering has been developed in this paper. FPAs were designed using a square PRS for 1-D and 2-D beam steering with gains of up to 17 dBi. The model has been verified with the simulated results at 8 GHz and 8.5 GHz, demonstrating consistent field patterns with the full-wave simulations.

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Dr. Akshar Tripathi

Prof. Mahesh Pandurang Abegaonkar