Mr. Chao Wu Profile

Chao Wu

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Proceedings Article | 21 June 2019 Presentation + Paper

Radiometer effectiveness in real cases for disclosing stealth

Hao Liu, Chao Wu, Dajing Wang, Hongmei Li, Jinghui Qiu, Alexander Denisov

Proceedings Volume 11059, 1105905 (2019) https://doi.org/10.1117/12.2525965

KEYWORDS: Radiometry, Radar, Coating, Microwave radiation, Antennas, Absorption, Signal detection, Reflection, Black bodies, Sensors

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Modern radars systems for anti-air and anti-ship application naturally had born interest how to do the antidote against of it. Stealth or how to do the reduction of the radar cross section concerns mainly two decisions: a) The creation specially oriented surfaces which reflect radar radiation to the space or down – some kind as “in milk” (on technical language). b) Using special absorption coating on the surfaces and places which is impossible or very difficult to exclude from the reflection of the radar radiation. Absorption in this case means – sounding radar power will be absorbed by the material/s of such coating. Such coating works as black body or matched loading if to talk on microwave language. For the microwave radiometer such surfaces and coating are not antidote for the disclosing according to the physics of radiometer’s job. Nature produces radiation, which re-reflect from the various surfaces to an antenna of the radiometer from the appropriated directions from the sphere of sky or the earth with power depending on, so named, radio-brightness temperatures. And the coating if it the matched loading produces microwave radiation corresponding to her physical temperature. For the both cases a) and b), Stealth object can be disclosed by radiometer in some real cases. Keywords: stealth coating, microwave radiometer,

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