LAUSR

Abstract A novel design of compact UWB antenna is presented using a spanner shaped microstrip line. The proposed antenna consists of a rectangular patch with step slot at one of the lower edge and the defected ground plane embedded with a mirror imaged ‘P’ shaped slot. By using the novel spanner shaped feed line, the measured bandwidth of 153.22% (2.94–22.2 GHz) for VSWR ≤ 2 is achieved. The realised gain of the antenna is calculated and it is varying from −1.38 to 5.18 dB for the entire band of operation. The radiation patterns of the antenna are measured at 3.1, 6.85, 10.6 and 18 GHz which includes lower, middle and upper cut off frequencies of UWB region. The prototype of the design is fabricated and measurement is carried out in order to validate the proposed results. Also, the time domain analysis is performed to calculate the group delay and fidelity factor which are satisfying the UWB limits.