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全极化微波辐射计加法型模拟复相关器研究
Study on Additive Analog Correlator Used in Fully Polarimetric Radiometer
查看参考文献11篇
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文摘
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全极化微波辐射计的核心部分是复相关器。介绍了一种加法型模拟复相关器,它采用混合耦合器构成移相网络,在中频将电磁波信号相位调整到特定状态,从而实现了用加法思想获取全部Stokes参量。分别研制了分布参数和集总参数的移相网络,对它们测量并进行比较。最后对加法型模拟复相关器进行了整体测试,给出了噪声源测量下的相位反演能力测试。结果表明加法型模拟复相关器具有较好的极化测量性能。 |
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其他语种文摘
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Fully polarimetric radiometer’s key component is the complex correlator.An additive analog complex correlator is represented in this paper.The phase-shifting network constituted by hybrid coupler is used to adjust the electromagnetic phase to a specific state in IF,and all Stokes parameters are obtained by using the additive thought.Both distributed and lumped parameters of phase-shift networks are developed respectively,their measurement and comparison are performed too.At last,the overall test for the additive analog complex correlator is presented,and the ability of the phase inversion under the condition of noise source measurement is discussed.The performed and results show that the additive analog complex correlator has a good performance in polarization measurement |
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来源
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宇航学报
,2011,32(8):1840-1847 【核心库】
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DOI
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10.3873/j.issn.1000-1328.2011.08.028
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关键词
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全极化微波辐射计
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加法型模拟相关器
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混合耦合器
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地址
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中国科学院空间科学与应用研究中心, 中国科学院微波遥感受技术重点实验室, 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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1000-1328 |
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学科
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测绘学 |
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文献收藏号
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CSCD:4283139
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参考文献 共
11
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