Design and Research of a Compact UWB Antenna with Multi-band-Notched Characteristics

A compact UWB antenna with multi-band-notched property is presented. The antenna is composed of a circular patch and improved ground. The multi-band-notched characteristics are achieved by embedding two arc U-shaped slots on the radiating patch and etching a narrow U-shaped slot on the ground plane. The proposed antenna has a compact volume of 32 mm′25 mm′1.6 mm. Simulated and measured results show that the antenna has bandwidth of 2.8 ~16 GHz, it realizes band-notched characteristics of triple stop-bands at 3.2~3.8 GHz, 4.5~5.5 GHz and 7.2 ~8.6 GHz, and efficiently rejects the jamming from WiMAX (3.3 ~ 3.6 GHz), large capacity microwave communication (4.5 ~ 5 GHz), partial WLAN (5.1~5.35 GHz), X band (7.25 ~ 7.75 GHz) and ITU (8.01 ~ 8.5 GHz) band signals. The antenna exhibits good performance and radiation characteristics except at reject-bands, making it more suitable for UWB application.