Abstract
The paper presents the design of circular patch antenna with a simple rectangular defected ground structure (DGS) for ultra-wide band width. The comparative study of patch without DGS and with DGS is presented. The effect of dimensions of rectangular DGS on the performance of the antenna is also observed. An ultra-wide band width from 3GHz to 12GHz is achieved with less than −10dB return loss and is suitable for many applications. The simulation was done with CST MW Studio.
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