一种带宽增强型平面倒F天线的设计

Design of a Planar Inverted-F Antenna with Enhanced Impedance Bandwidth

提出了一种具有超宽带阻抗匹配特性的紧凑型改进平面倒F天线。该天线由一个驱动F形单元和一个寄生F形单元组成,这两种贴片单元都是倒置的,并且有两个不对称的条带分别连接到两个贴片上,可以获得一个工作在334~1947MHz,VSWR≤2的超宽带天线。天线的整体尺寸为230 mm×110mm×60 mm。对所设计天线的VSWR、辐射方向图和增益特性进行了测试分析,同时与仿真结果进行了对比验证。

A compact modified planar inverted-F antenna(PIFA) with ultra-wideband impedance matching characteristics is presented. The proposed antenna consists of a driven F-shaped element and a parasitic Fshaped element. Both patches are inverted and two strips are asymmetrically attached to the two patches. With the use of the asymmetrically strips, an ultra-wide operating bandwidth(2:1 VSWR) from 334 to 1947 MHz is obtained. The overall size of the antenna is 230 mm × 110 mm × 60 mm. The measured VSWR, radiation patterns, and gain have been analyzed and compared with the simulated results.