In this paper, discrete particle swarm optimization technique has been utilized in HFSS software for optimization of the Z-shape patch antenna with I-slot dimensions in order to achieve return loss, VSWR, directivity and gain. The designed antenna is to operate in Wi-Max / S-band and C-band satellite application with the center frequency at 3.5 GHz and 4.3 GHz and various important performance metrics of the patch antenna are analyzed for performing comparative analysis between un-optimized

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... h antenna and optimized patch design. The main point of the paper is to examine the suitability of discrete particle swarm optimization algorithm for antenna parameter optimization to achieve the better overall performance of the antenna. DPSO is general-purpose optimizer well suited for conducting search within a discrete search space.