一种具有多阻带特性的超宽带天线设计

本文设计了一种具有多阻带特性的平面超宽带天线.该天线由共面波导(CPW)馈电单元和一个椭圆形的辐射单元构成.辐射单元上的C型槽产生了第一条阻带,其中心频率为3.5 GHz.地板上两对称的蛇形槽线产生了第二条阻带,其中心频率为5.5 GHz.第三条阻带,即超宽带高频段的截止阻带,通过馈线上的U型槽实现.天线的测量结果与仿真结果吻合较好,在超宽带频带内实现了3.2 GHz～3.8 GHz,5.05 GHz～5.9 GHz以及高于10.7 GHz的阻带,表明其在工作频带内具有良好的抑制干扰能力.此外,讨论了天线的增益、群时延响应和信号波形保真度,结果表明此天线具有良好的频域特性和时域特性.

Design of a compact UWB antenna with multiple band-notched characteristics

A simple and compact planar ultra wideband (UWB) antenna with multiple band notched characteristics is presented. It consists of a coplanar waveguide and an elliptic radiator. The first band notched characteristic in the vicinity of 3.5 GHz is achieved by embedding a C shaped slot in the radiated patch, while the second one in the vicinity of 5.5GHz is achieved by using two symmetric serpentine slots in the ground plane. The third notched band is accomplished by etching a U shaped slot in the feeding strip, which cut off of the out of band frequency (above 10.6 GHz). The measured results match reasonably with the simulation. There are three notched bands among the UWB frequency range, such as 3.2 GHz~3.8 GHz, 5.05 GHz~5.9 GHz and above 10.7 GHz, which indicates that the antenna can prevent potential interference. Meanwhile, the gain, the group delay and the time domain pulse response of the presented antenna are also examined, which can also prove its good performance.