改进的双频平面倒F天线

一种改进的双频平面倒F天线

内容简介：为了展宽PIFA天线的阻抗带宽,采用改变天线馈电结构的方法,应用电磁仿真软件进行仿真模拟,提出一种改进的、双频段、小型平面倒F天线(PIFA).讨论了馈电结构与天线结构参数对天线阻抗特性的影响,获得天线回波损耗小于-10 dB的相对带宽为10.54%(908~1009 MHz)及26.38%(2042~2662.5 MHz).天线在两个频段具有良好的辐射特性及增益特性,且该天线尺寸小、重量轻,适用于移动通信终端.

Abstract：A modified dual?band compact planar inverted?F antenna(PIFA)is presented to widen the impedance bandwidth of PIFA antenna. As a result of the improvement of the feeding structure of the antenna,the impedance bandwidth of the pro?posed antenna is broadened. The influence of feeding structure and the antenna structural parameters on the impedance characteristics of the antenna is discussed. The feeding structure and antenna structural parameters are optimized with electromagnetic simulation software. The antenna whose return loss is S11<-10 dB and relative bandwidth is 10.54%(908~1 009 MHz) and 26.38%(2 042~2 662.5 MHz)is achieved. The antenna have good radiation and gain characteristics in two frequency bands,and is compact,light?weighted and applicable in mobile communication terminals.

作者：吕春艳, 刘运林, 王宁, 董兴超,

关键词：天线, 小型化天线, 双频段, 平面倒F天线,