紧凑型共面波导馈电的双极化槽天线  

Compact CPW-fed dual-polarization slot antenna

作　　者：李越[1] 张志军[1] 陈文华[1] 冯正和[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《电波科学学报》2010年第3期405-408,共4页Chinese Journal of Radio Science

基　　金：国家重点基础研究发展规划项目(2009CB320205);国家高科技发展计划项目资助课题(2007AA01Z284);国家自然科学基金(60771009)

摘　　要：针对MIMO系统中天线阵列的应用，提出一种宽带、紧凑型共面波导馈电的双极化槽天线，利用单天线的双极化代替两个单极化天线。该天线采用单一矩形槽作为天线单元，利用同一共面波导两种正交的模式激励槽天线单元的水平和垂直两种极化模式，隔离度优于-22dB，实现的-10dB带宽分别为690MHz（28．75％）、590MHz（24．58％）。该天线覆盖无线局域网（WLAN）所需频带2．4～2．484GHZ，天线辐射效率高于86％，增益大于4．0dBi。In this paper, a compact co-plane waveguide（CPW）fed dual-polarization slot antenna is proposed for antenna array in MIMO system. Dual polarization antenna is utilized as a substitution of two single polarized antennas. One CPW is used for feeding with two orthogonal modes to excite horizontal and vertical polarizations of the slot antenna element. The isolation of two ports is less than -25 dB. The bandwidth of 690 MHz（28.75%）and 590 MHz（24.58%）can be achieved in two polarizations with return loss less than -10 dB, covering the WLAN frequency range（2.4-2. 484 GHz）. The efficiency of radiation is higher than 86% and the gain is higher than 4.0 dBi.

关 键 词：双极化 端口隔离度 共面波导 正交模式 

分 类 号：TN828.6[电子电信—信息与通信工程]