一种小型化五频段可重构蝶形天线的设计

Design of a compact bowtie antenna with fiveband reconfigurable characteristics

摘要: 提出了一种新型多频段可重构天线.该天线采用小型平面蝶形结构，尺寸为35.0 mm×38.0 mm×1.6 mm，由U型馈电带线、矩形寄生单元和接地面构成.通过调节馈电带线的长度和选择寄生单元，改变天线的局部结构和表面电流分布，从而获得不同的工作频段.该天线可在1.94～2.22 GHz、2.32～2.54 GHz、3.08～3.78 GHz、3.63～4.83 GHz、4.82～6.85 GHz五种频段之间实现可重构，覆盖了主要的无线通信系统工作频段，各个状态具有良好的全向辐射特性和较高增益.因此，具有较大的实用价值.

Abstract: A novel multiband reconfigurable antenna is proposed in this paper.The antenna has a compact planar bowtie structure of 35.0 mm×38.0 mm×1.6 mm and mainly consists of Ushape strip，rectangular parasitic elements and ground plane.By tuning the length of feed and selecting parasitic elements，partial structure and current distributions of the proposed antenna can be changed and the different operating frequencies are obtained.The proposed antenna can be switched among the bands of 1.94～2.22 GHz，2.32～2.54 GHz，3.08～3.78 GHz，3.63～4.83 GHz and 4.82～6.85 GHz，which cover major bands of wireless communication systems，and all modes have nearly omnidirectional radiation patterns and relatively high gains.