Abstract

In this paper the compact circular slot antenna suitable for UWB applications is presented. The bandwidth enhancement technique introduced in this design is using modified patch and ground plane of the antenna with ring and circular shaped slots on the patch.The diagonal cuts at the top corners and the rectangular slots can increase the bandwidth of antenna. The proposed antenna is excited with a simple 50- microstrip line. The simulated and measured results indicate that the proposed antenna with dimensions of 30mm (Wsub) x 50mm (Lsub ) x 1.6mm (H) has a large bandwidth over the frequency band from 2.75 GHz to 20 GHz with VSWR less than 2.The presented results also depict the radiation behavior which exhibit good radiation pattern, and impedance bandwidth over the entire band of operation.