A compact ultra wideband antenna with dual band-notched design

The coexisting issue between ultra-wideband (UWB) system and narrow band system has been a major concern for quite a while. A filtering property is required in a wideband system in order to avoid the potential interference from other established narrow band system. Therefore, an UWB antenna with notch band function is highly sought after to eliminate the interfering signals. This paper presents a compact UWB antenna integrated with dual band notched and desirable gain characteristics. The proposed antenna consists of an octagon shaped patch with a truncated ground plane that is fed by a 50 Ω microstrip line. By inserting two altered H-shaped slots on the proposed radiator, dual band-notch at the targeted WiMAX frequency band of 3.3 to 3.6 GHz and WLAN frequency band of 5.1 to 5.8 GHz are created. The proposed antenna is successfully designed and simulated showing good impedance matching from 2.8 GHz to 11 GHz. Furthermore, the proposed antenna has a compact size of 26 × 32 mm².