双频陷波可调的超宽带天线

Tunable Ultra-wide Band Antenna With Dual Notched Bands

该文提出了一种双频陷波可调谐超宽带天线。此天线基于圆形贴片天线,通过在接地板上刻蚀"工"字型缝隙改善了超宽带特性;随后,通过在辐射单元表面刻蚀"C"字型缝隙,实现了超宽带天线的双陷波特性。为了满足实际通信需求,又在"C"字型缝隙上引入可变电容技术得到双频陷波的可调谐特性。最后搭建了天线测试平台。实验测试结果与仿真结果相符,且此天线具有良好的全向辐射特性。

An ultra-wideband antenna with two tunable notched bands is proposed and designed in this paper.This antenna is based on the circular patch antenna and the ultra-wideband characteristic has been improved by etching the I-shaped slot on the ground plane.The dual notched bands characteristics of this antenna are also realized through embedding two C-shaped slots on the surface of radiation element.Moreover,in order to meet the actual communication requirements,the tunable characteristics of the dual notched band are obtained by introducing the variable capacitance technique into the C-shaped slots.An antenna test platform is set up.The experimental results of manufactured prototypes are in good agreement with the simulation results.The designed antenna has good omnidirectional radiation characteristics.