U-shaped Monopole Antenna design with Defected Ground Structures for UWB Applications

Abstract

Here, a plain fork shaped monopole antenna with compact printed dual-band fork – shaped antenna designed with low cost for ultra wideband (UWB) applications is proposed. It uses a fork-shaped patch and also a rectangular ground patch having a defected structure to work in the 3.1–10.6 GHz (UWB) frequency band. A 50-microstrip line feeds this antenna, which is fabricated on a low-cost FR4 substrate with dimensions of 42 x 24 x 1.6mm. Fabrication and testing of the antenna structure has been completed. Over 3.2–11.8 GHz, S11 is estimated to be 10 dB. Over the UWB band, the antenna exhibits suitable flatness in gain and has an omnidirectional radiations.