Design of a X band defected ground circular patch antenna with diamond shaped slot and ring in patch for UWB applications

This paper focuses on the bandwidth enhancement of a traditional circular patch antenna by introducing a diamond-shaped slot surrounded by a diamond-shaped ring in the center of the patch with a defected ground technique. The enhanced bandwidth of 506 MHz ranging from 9.872 GHz to 10.378 GHz is achieved with the proposed design method. Unlike other methods of bandwidth enhancement of a circular patch antenna, this method eliminates the trade-off between BW enhancement, gain and compactness of the antenna. In this paper, also the performance of the proposed antenna have been contrasted over a conventional circular patch antenna. The center frequency is chosen at 10 GHz in the X-band, which is suitable for satellite communication along with other UWB applications. The design and simulation results of the antenna are acquired using CST microwave studio.