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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Investigation of Factors Contributing Depolarization in Offset Reflector Antenna and Trimmed-Reflector Offset Parabolic Antenna with Lower Cross-Polarization
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Investigation of Factors Contributing Depolarization in Offset Reflector Antenna and Trimmed-Reflector Offset Parabolic Antenna with Lower Cross-Polarization

机译：具有较低交叉极化的偏置反射器天线和微调反射器偏置抛物线天线的去极化因素研究

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This article outlines impact of various factors on cross-polarization character-istics of offset reflector antenna for communication spacecraft with smaller sized bus at C band. Effects of different parameters are considered in rigorous analysis of the antenna. Measured and predicted performances are found in agreement. To fulfill specific require-ment of higher edge-of-coverage gain (>26 dBi) and higher cross-polarization discrimina-tion (XPD > 30 dB) over a wider coverage and dual linear polarization under the imposed constraints, a novel trimmed-reflector offset parabolic antenna (TROPA) is devised. This interesting configuration is obtained by trimming both sides parallel to symmetrical plane of a parabolic offset reflector antenna. Parametric study of trimming distance versus its impact on cross-polarization is also presented. The TROPA acquires wider bandwidth, simplification in its mechanical design and manufacturing, and offers low weight and compactness. It is also shown that trimmed reflector has almost even RF performance in presence of spacecraft body and other antenna.
机译：本文概述了各种因素对在C波段具有较小总线的通信航天器的偏移反射器天线的交叉极化特性的影响。在天线的严格分析中考虑了不同参数的影响。测得的和预测的性能一致。为了满足更高的覆盖边缘增益（> 26 dBi）和更高的交叉极化辨别力（XPD> 30 dB）的特定要求，该方案在施加的约束条件下具有更宽的覆盖范围和双线性极化，设计了反射器偏置抛物线形天线（TROPA）。通过修整平行于抛物线偏移反射器天线的对称平面的两侧，可以获得这种有趣的配置。还介绍了微调距离及其对交叉极化的影响的参数研究。 TROPA拥有更宽的带宽，简化了机械设计和制造，并且重量轻，结构紧凑。还表明，在存在航天器主体和其他天线的情况下，修整的反射器几乎具有均匀的RF性能。

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