A Rectangular Monopole UWB Patch Antenna with CSRR slots having dual band notch Characteristics

A planar monopole antenna for ultra-wide band (UWB) application has been presented in this letter. In order to gain an excellent band-rejection characteristic at WLAN band and ITU band, a rectangular shaped patch and a CSRR slot with two resonators near the feed line has been designed. The performance of the proposed antenna is investigated by using the software CST MW Simulator and the results achieve good impedance matching over an operating bandwidth of 3.4 - 13.60 GHz, which meets the requirement of UWB application well. Dual band notch curves have been achieved by inserting a slot in the patch and by location two resonators near the feed lines. The proposed antenna has good return loss graph having two notches first covering the WLAN band and notching the 5.5GHz second at 7.6GHz. Surface current distribution at various frequencies is also shown in the letter with few radiation pattern graphs in E-plane and H-plane.