基于U形槽陷波的共面波导超宽带天线

基于U形槽陷波的共面波导超宽带天线

内容简介：针对超宽带系统易受IEEE802．11a无线局域网（WLAN）的干扰问题，提出了带有U形槽的平面超宽带天线。该天线采用共面波导馈电，并在波导馈线处刻蚀一U形槽实现5．1～5．9 GHz的陷波。仿真结果表明，在2．7～12 GHz的范围内，该天线阻抗带宽为9．3 GHz（126％），带宽内具有良好的阻抗特性和全向辐射特性，并且在5．1～5．9 GHz频带内具有明显的陷波特性，能够有效地抑制 WLAN之间的干扰，是一种性能较好，易于集成，有实用价值的陷波超宽带天线。

Abstract：A novel planar ultra-wideband (UWB) antenna is proposed, which has a band-notched characteristic for the interference between the UWB applications and the IEEE 802.11a wireless local area network(WLAN).The proposed antenna fed by coplanar waveguide (CPW) with a broken U-shaped slot which can be used to reject the frequency 5.1 to 5.9 GHz.The simulation results show that , the imped-ance bandwidth is 9.3GHz(126%) within the frequency band of 2.7 to 12 GHz, and the antenna has ob-vious band-notched characteristics in the notched band which can effectively prevent the interference of WLAN.Also good impedance characteristic and Omni-directional radiation patterns are obtained over the frequency band.The performance of the proposed antenna shows that it is a kind of good performance , easy integration, band notched UWB antenna with practical value .

作者：纪涛, 卢新栋,

关键词：超宽带(UWB)天线, 陷波特性, 共面波导(CPW), U形槽,