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首页> 外文期刊>Geoscience and Remote Sensing, IEEE Transactions on >Radiometric and Spatial Resolution Constraints in Millimeter-Wave Close-Range Passive Screener Systems
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Radiometric and Spatial Resolution Constraints in Millimeter-Wave Close-Range Passive Screener Systems

机译：毫米波近距离无源筛选器系统中的辐射度和空间分辨率约束

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摘要

This paper presents a comparative study of the radiometric sensitivity and spatial resolution of three near-field (NF) passive screener systems: real aperture, 1-D synthetic aperture (SA), and 2-D SA radiometers are compared. The analytical expressions for the radiometric resolution, the number of required antennas, and the number of pixels in the image are derived taking into account the distortion produced by the NF geometry at nonboresight directions where the distortion is dominant. Based on the theoretical results, a performance comparison among the studied systems is carried out to show the advantages and drawbacks when using the radiometers in a close-range screening application. Moreover, the screener performance in a close-range environment is discussed from the results obtained in the aforementioned comparison.
机译：本文对三种近场（NF）无源筛选系统的辐射灵敏度和空间分辨率进行了比较研究：比较了实际孔径，一维合成孔径（SA）和二维SA辐射计。考虑到NF几何在非视线方向上的失真所占主导地位，得出了辐射分辨率，所需天线数和图像中像素数的解析表达式。根据理论结果，对所研究系统之间的性能进行了比较，以显示在近距离筛选应用中使用辐射计时的优缺点。此外，从上述比较中获得的结果讨论了近距离环境中的筛选器性能。

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