毫米波目標(biāo)輻射亮溫的極值解
Extremal solution of the target\s brightness temperature in millimeter wave radiometric measurements
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摘要: 毫米波近感技術(shù)是利用物體的毫米波輻射特性,探測(cè)識(shí)別目標(biāo)的技術(shù)。它在許多領(lǐng)域有著重要作用。為在毫米波輻射探測(cè)中求得精確的真實(shí)目標(biāo)亮溫,必須建立天線電磁輻射與環(huán)境電磁輻射交會(huì)的數(shù)學(xué)模型。此是第一類病態(tài) Fredholm積分方程,該文給出毫米波輻射計(jì)目標(biāo)輻射亮溫的極值解。
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關(guān)鍵詞:
- 毫米波輻射計(jì); 天線溫度; 亮度溫度; 第一類Fredholm積分方程; 反演
Abstract: The near sensing techniques with millimeter wave play important role in many fields. To make precise measurements of the radiometric brightness temperature of a target, one must set up model of the interaction between the electromagnetic radiation properties of the antenna and the incident radiation from the environment. This interaction can be described by Fredholm integral equation of the first kind which is extremely unstable. In this paper, a inversion method is presented and is then applied to retrieve armored targets brightness temperature in millimeter wave radiometric measurements. -
J.T. Holmes, C. A. Balanis, W. M. Truman, Application of Fourier transforms for microwave radiometric inversions, IEEE Trans. on Antennas Propagat., 1975, AP-23(6), 797-806.[2]W. M. Truman C. A. Balanis, J. J. Holmes, Three-dimensional vector modeling and restoration of flat finite wave tank radiometric measurements, IEEE Trans. on Antennas Progagat., 1977,AP-25(1), 95-104.[3]A. Stogryn, Estimates of brightness temperatures from scanning radiometer data, IEEE Trans.on Antennas Progagat., 1978, AP-26(5), 720-726.[4]J.P. Claassn, A. K. Fung, The recovery of polarized apparent temperature distributions of flat scenes from antenna temperature measurements, IEEE Trans. on Antennas Progagat., 1974,AP-22(3), 433-442.[5]李興國,毫米波近感技術(shù)及其應(yīng)用,北京,國防工業(yè)出版社,1989,第二章. -
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