大型星载Ku波段波导缝隙阵列天线—宽频带设计及热变形分析
Wideband Design and Thermal Deformation Analysis of Space-borne Large Waveguide Slots Array Antenna in Ku-band
查看参考文献10篇
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文摘
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高度计波导缝隙阵列天线是高增益、低副瓣天线子系统,其宽频带、窄波束等特点对天线设计将提出较高要求.天线阵面较大,在空间环境冷热交替的作用下会发生形变,因此,有必要研究形变对天线电性能的影响.本文采用天线阵分区馈电、波导中心馈电以及加载元件等技术,解决了天线宽频带设计问题,并针对热变形问题,提出一种分析天线热变形对其电性能影响的新方法.现已加工出8×10阵列天线实验件,实测结果表明,1.3以下驻波带宽为340 MHz,E面副瓣电平为-25.9 dB,H面副瓣电平为-27.2 dB,满足实际要求,验证了设计方法的有效性. |
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其他语种文摘
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Waveguide slots array antenna was adopted in engineering project. Though this antenna had high gain, low side lobe etc,wideband requirement was a big challenge for it. As working in the space environment, large space-borne antenna would be influenced by the thermal deformation. It was necessary to analyze the influence on electrical performance, such as radiation pattern. In order to enlarge the band, antenna was separated into four areas to feed, and the feeding point was in the center of the waveguide. Special loads were exerted in waveguide H-T and E-T junctions to meet impedance matching. An approximate computation method was provided to analyze the influence of the thermal deformation on antenna performance. Some 8 x 10 slots array antennas were manufactured as the first step, and these antennas were tested in our near field testing system. The bandwidth of the Voltage Standing Wave Ratio (VSWR) below 1.3 was 340 MHz, and the side lobe level was -25.9 dB in E plane and -27.2 dB in H plane. Measurement result indicated the availability of the designe. |
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来源
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空间科学学报
,2013,33(2):207-212 【核心库】
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关键词
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星载
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波导缝隙
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阵列天线
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热变形
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宽频带
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地址
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中国科学院国家空间科学中心, 中国科学院微波遥感技术重点实验室, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0254-6124 |
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学科
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航天(宇宙航行) |
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基金
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国家863计划
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中国科学院空间科学与应用研究中心前研创新项目
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文献收藏号
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CSCD:4813449
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参考文献 共
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