一种可控三陷波超宽带天线设计与研究

为了避免如WiMax, WLAN和X频段卫星系统等窄带通信系统对超宽带通信系统的影响，该文提出一种具有可控三陷波特性的超宽带天线。该天线通过在辐射贴片和接地板上开槽，并在基板背面增加环形寄生单元的方法实现三陷波特性。天线在3.1~10.6 GHz的超宽带频段内能够有效地工作并抑制3种不同的窄带通信系统的干扰。同时在环形寄生单元处增加开关设置，使天线能够实现双/三陷波的功能切换，并增强陷波性能。实测和仿真结果吻合，该天线实现了良好的陷波功能，在工作频段内有良好的辐射方向特性。

Design and Analysis of Controllable Tri-band-notched Ultrawide Band Antenna

A controllable tri-band-notched UltraWide Band (UWB) antenna is presented to avoid the interference of services working in the UWB band such as WiMax, WLAN, and X-band satellite system applications. The tri-band-notched characteristics are achieved by etching slots on the radiating patch and the ground plane, and adding a parasitic ring unit on the back of substrate. The proposed antenna operates on the UWB (3.1~10.6 GHz) efficiently, and it can inhibit interference from three different kinds of narrow band communication systems. A switch is added on the parasitic ring unit in order to realize the conversion between dual band-notched and tri-band-notched functions. Simulated and measured results show that the proposed antenna provides excellent band-notched function on the rejectband and has nearly omnidirectional radiation patterns on the passband.