小型化宽频带PIFA 天线的设计与仿真

针对现代通信系统终端小型化、宽频带的要求，本文提出了一种新型小型化宽频带平面倒F 天线。该天线由 金属地板、辐射贴片、短路贴片和馈电系统四部分组成。其中对地板进行十字缝隙开槽，短路贴片采用短路墙，馈电 系统采用二等分威尔金森功分器。采用HFSS13.0 软件对天线进行仿真，仿真结果表明，该天线在2.01~2.61GHz 频带 范围内驻波比小于2, 阻抗带宽达到26.3%；1.66~2.75GHz 频带范围内增益大于3dBi，增益带宽达到47.4%。同时，天 线的自由空间辐射方向图也满足无线通信终端要求。

The Design and Simulation of a Broadband FIFA Antenna

In order to meet the demand of the miniaturization, broadband of system of the modern communication terminals, a novel miniaturization, wideband of planar inverted-F antenna (PIFA) is proposed in this paper. The antenna consists of four parts, including mental ground, radiating patch, short circuit patch and feeding network. A cross slot is etched on the ground plane, and a short patch is applied to connect the patch and the ground plane. A Wilkinson power-divider is used as the feeding network. The proposed antenna was simulated by software HFss13.0, the simulated results show that the antenna possess an impedance (VSWR<2) bandwidth of 26.3%, ranging from 2.01GHz to 2.61GHz. And the antenna possesses a bandwidth of 47.4% for the Gain higher than 3 dBi, ranging from 1.66GHz to 2.75GHz. Meanwhile, the radiating patterns in free space meet demands of the wireless communication terminals.