共用口径双波段双极化微带天线阵的设计  

Design of a Shared-Aperture Dual-Band Dual-Polarized Microstrip Antenna Array

作　　者：瞿新安[1] 钟顺时[1] 沈亮[1] 金骏[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《上海大学学报（自然科学版）》2007年第3期225-229,共5页Journal of Shanghai University:Natural Science Edition

基　　金：教育部高校博士学科点专项科研基金资助项目(20050280016);上海市重点学科建设资助项目(T0102)

摘　　要：介绍一种新的共用口径双波段双极化(DBDP)微带天线阵的设计.天线工作于S波段和X波段,采用双线性极化,适用于机载或舰载的合成孔径雷达(SAR).为了满足高低波段的带宽要求,天线采用双层贴片形式,解决以往DBDP天线在低波段难以满足带宽要求的问题.在低波段采用微带振子天线,放置在高波段矩形微带天线的阵列间隙处,使低波段天线对高波段天线的影响降至最小,并由于利用了垂直放置的双极化微带振子作为低波段辐射单元,可以使双波段阵列适用于更广泛的双频比.在馈电方式上,采用外置功分器的形式,低波段采用邻近耦合馈电,高波段采用同轴探针馈电.对天线进行了仿真、加工和测试,实验结果验证了本设计的有效性.A new design of the shared-aperture dual-band dual-polarized （DBDP） microstrip antenna array is introduced. The antenna operates in S-band and X-band with dual-linear polarization, suitable for airborne and shipborne synthetic aperture radar （SAR） applications. To meet the bandwidth requirements in both bands, a stacked patch configuration is used. This overcomes the difficulty of the previous DBDP antennas in obtaining large bandwidth in the lower band. Furthermore, to minimize the influence on the higher band, mierostrip dipoles are used in the lower band, located in the spaces among X-band patches. By using orthogonal dualpolarized mierostrip dipoles as the lower band radiation elements, the dual-band array can be applied for a wider range of frequency ratio. The mierostrip power combiner is not integrated in the array. The lower and higher bands use proximity coupled feed and probe feed respectively. The array was simulated, fabricated and measured. Experimental results have verified feasibility of the proposed array.

关 键 词：微带天线阵 双波段 双极化 共用口径 合成孔径雷达 

分 类 号：TN822[电子电信—信息与通信工程]