电子学报 ›› 2012, Vol. 40 ›› Issue (3): 542-547.DOI: 10.3969/j.issn.0372-2112.2012.03.022

• 学术论文 • 上一篇    下一篇

宽带双波段双极化共口径SAR天线设计

孙竹1, 钟顺时1, 孔令兵1, 高初2, 汪伟2, 金谋平2   

  1. 1. 上海大学通信与信息工程学院,上海 200072;2. 华东电子科技集团第三十八研究所,安徽合肥 230031
  • 收稿日期:2011-08-08 修回日期:2011-12-21 出版日期:2012-03-25
    • 基金资助:
    • 国家自然科学基金项目 (No.60871030)和国家高技术发展研究 (863)计划课题 (No.2007AA12Z125)

Design of Broadband Dual-Band Dual-Polarized Share-Aperture SAR Antenna

SUN Zhu1, ZHONG Shun-shi1, KONG Ling-bing1, GAO Chu2, WANG Wei2, JIN Mou-ping2   

  1. 1. School of Communication and Information Engineering,Shanghai University,Shanghai 200072,China;2. China Electronics Technology Group Corporation No.38 Research Institute,Hefei,Anhui 230031,China
  • Received:2011-08-08 Revised:2011-12-21 Online:2012-03-25 Published:2012-03-25

摘要: 介绍了一种应用于合成孔径雷达(SAR)的X和S双波段双极化(DBDP)共用口径宽带天线阵的设计与测试结果.针对以往同类天线低频百分比带宽明显较高频窄的缺点,设计中采用了三谐振技术来展宽低频波段的带宽;并综合采用多种方法以改善两个波段的极化隔离度.经实测,样阵X和S波段的带宽(VSWR≤2)分别达到13.1%和11%;带内阵列隔离度优于37dB,单元隔离度优于28dB;阵列方向图与理论均吻合很好,主瓣内交叉极化优于27dB;X波段扫描能力达±27°.

关键词: 宽带, 高隔离度, 双波段, 双极化, 共用口径, 微带天线阵, 非整数频率比, 合成孔径雷达天线

Abstract: A broadband dual-band dual-polarized (DBDP) shared-aperture array operating at X- and S- bands for the synthetic aperture radar (SAR) application is presented.Tri-resonance is introduced in the lower frequency element to broaden its intrinsic narrower bandwidth.Furthermore,several methods are employed to enhance the polarization isolation in both bands.VSWR≤2 bandwidths of 13.1% and 11% are measured in X- and S- band,respectively,where in-band array isolation and element isolation are better than 37dB and 28dB.The measured radiation patterns match well with the theoretical ones while the cross-polarization level is suppressed under -27dB within mainlobe;the X-band scan ability of ±27° is also confirmed by the measurement.

Key words: broad band, high isolation, dual-band, dual-polarization, shared aperture, microstrip array, non-integral frequency ratio, SAR antenna

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