一种用于手持移动终端的九频段平面印制天线  

Nine-band planar printed antenna for mobile handsets

作　　者：王尚[1] 杜正伟[1] 

机构地区：[1]清华大学电子工程系 清华信息科学与技术国家实验室(筹),北京100084

出　　处：《电波科学学报》2015年第1期43-48,共6页Chinese Journal of Radio Science

基　　金：国家科技重大专项(2012ZX03003002-004);国家自然科学基金(61371010;60971005);项目(9140A33020411JW27)

摘　　要：提出了一种应用于手持移动终端的九频段平面印制天线,该天线结构紧凑,尺寸为20mm×28mm×0.8mm.利用弯折单极子、寄生地枝和耦合分枝激励起了五个谐振模式,并通过三个调节片和位于馈电点附近的阶梯形过渡结构改善了各个谐振模式的阻抗匹配,从而拓展了天线的工作带宽通过分析该天线关键参数对带宽性能的影响,对关键参数进行了优化,得到了满足性能要求的天线结构.天线样品的实测-6dB阻抗带宽为700~1 008 MHz和1 692~2 984 MHz,覆盖了LTE700/2300/2500,GSM850/900,DCS/PCS/UMTS和2.4-GHz WLAN频段;A nine-band planar printed antenna with a compact size of 20mm×28mm×0.8mm for mobile handsets is proposed.A meandering monopole,aparasitic ground branch and a coupling branch are adopted to generate five resonant modes,and the impedance matching is improved by introducing three tuning pads and a step-shaped transition structure near the feeding point for all the resonance modes,resulting in enhanced operating bands of the proposed antenna.By analyzing the effects of the crucial parameters of the proposed antenna on the bandwidth,the crucial parameters are optimized and the desired performance is obtained.The measured-6dB impedance bandwidth of the antenna prototype ranges from 700 to 1 008 MHz and from 1 692 to 2 984 MHz,covering the LTE700/2300/2500,GSM850/900,DCS/PCS/UMTS and 2.4-GHz WLAN bands.Good radiation performances are achieved over the operating bands.

关 键 词：多频段天线 手持移动终端 印制天线 长期演进(LTE) 

分 类 号：TN820[电子电信—信息与通信工程]