基于缺陷地结构的宽带多频天线设计  

Design of broadband multi-frequency antenna based on the defected ground plane

作　　者：金杰[1] 侯梓叶 潘勇[2] 

机构地区：[1]天津大学电子信息工程学院,天津300072 [2]重庆三峡学院计算机学院,重庆404100

出　　处：《电波科学学报》2015年第1期104-108,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(60777014);高等学校博士学科点专项科研基金(20090032110027)

摘　　要：提出了一种新的小型化、宽频带的多频微带天线该天线具备三个不同的工作频段,可同时工作在蓝牙、无线射频识别(Radio Frequency Identification Devices,RFID)、无线局域网(Wireless Local Area Network,WLAN)和全球微波互联接入(Worldwide Interoperability for Microwave Access,WiMAX)的通信频段上.该微带天线主要由四个半圆环、一个圆环、一个矩形带以及缺陷地组成.为了获得结构的小型化,通过在四个半圆环中增加一个圆环来激发出该天线的两个谐振频率,通过改进地板为带圆形缺陷的拱结构来获得第三个阻抗匹配良好的频段.实测结果显示:该天线在工作频段具有很好的辐射特性和增益.A new miniaturized wide-band multi-frequency antenna is proposed.The proposed antenna can generate three separate impedance bandwidths to cover all the2.4/5.8 GHz Bluetooth/WLAN/RFID operating bands and the 2.5/3.5/5.5 GHz WiMAX bands.The proposed microstrip-fed antenna mainly consists of four semicircular rings,a circular ring,a rectangle strip,and a defected ground plane.By adding a circular ring in the four semicircular rings,the antenna excites two resonant modes and is with miniaturization structure.Because of the introduction of the cambered ground plane with an circular-defect,the third wide band with better impedance matching is obtained.A prototype is experimentally tested,and the measured results show good radiation patterns and enough gains across the operation bands.

关 键 词：天波超视距雷达 小型化多频天线 蓝牙/RFID/WLAN/WiMAX 缺陷地 

分 类 号：TN822[电子电信—信息与通信工程]