一种应用于2.4 GHz的宽带差分微带滤波天线  

A Wideband Differential-fed Microstrip Filtering Patch AntennaWorking at 2.4 GHz

作　　者：王鹏飞[1] 张海福[1] 朱海波[1] WANG Pengfei;ZHANG Haifu;ZHU Haibo(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电通信技术》2020年第4期471-474,共4页Radio Communications Technology

基　　金：国家科技计划专项经费基金资助项目(2016QY10W1802)。

摘　　要：设计了一款能够覆盖WLAN-2.4 GHz(2.412~2.484 GHz)的宽带差分微带滤波天线。该天线由位于顶层的矩形辐射贴片、位于中间层的地板以及位于底层的滤波网络构成。相较于传统的微带天线,在辐射贴片的两侧加载了矩形寄生单元,使得天线在保持剖面高度不变的前提下拓展了工作带宽。将地板放置在天线的辐射体与馈电网络中间可以有效降低辐射贴片对馈电网络的影响。天线的滤波特性通过在底层加载一个三阶平行耦合型微带带通滤波器来获得。仿真结果表明,该天线在工作频带内具有良好的辐射和滤波特性,其阻抗带宽为2.39~2.53 GHz,天线整体高度仅为0.027个中心频率波长,天线的峰值增益约为8.9 dBi。In this paper,a wideband differential-fed microstrip filtering patch antenna working at 2.4 GHz is proposed.The antenna consists of rectangular radiation patches on the top layer,a ground plane in the middle layer,and a filtering network on the bottom layer.Compared with traditional microstrip antenna,the proposed antenna is loaded with rectangular parasitic elements on both sides of the radiating patch,so that the bandwidth of the antenna is expanded while keeping the height of the antenna unchanged.The ground plane is placed in the middle-layer of the antenna to reduce the impact of radiation patches on the feed network.The filtering characteristics of the antenna are obtained by loading a third-order parallel-coupled microstrip bandpass filter on the bottom layer.As a result,good radiation and filtering characteristics in the operating frequency band is obtained.The impedance bandwidth of the antenna is ranging from 2.39 GHz to 2.53 GHz,the profile of the antenna is 0.027λ(λis the wavelength of the center frequency),and the peak gain of the antenna reaches 8.9 dBi.

关 键 词：2.4 GHz 宽带差分天线 滤波天线 微带天线 

分 类 号：TN822[电子电信—信息与通信工程]