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2013-05-07

An Analytic Expression for Near-Field Angular Glint Prediction of Radar Sensor Using Far-Field Scattering Centers Models

By Jianpeng Fan, Shijie Fan, Hongqi Fan, and Huaitie Xiao
Progress In Electromagnetics Research M, Vol. 30, 225-238, 2013
doi:10.2528/PIERM13032105

Abstract

As an important signature of the radar target, the angular glints effects on radar sensor mainly arise at close distance, especially at target near field. However, the current prediction methods of angular glint are mostly based on the far field condition. This paper presents a prediction technique of near field angular glint based on the scattering center model to solve this problem. Firstly, the near field backscattering is represented based on far-field scattering center model. Then by solving the derivative of the backscattering phase vs. the position vector of the observer, including incident angles and range, we get the exact expression of angular glint at near field. Next, the exact expression is approximated and simplified in the range of terminal guidance. Finally, the factors affecting near-field angular glint are analyzed using numeric simulation, and the error comparison between the exact and approximate expression is also provided. It is concluded that the expression in [1] is the approximation of ours at far field under certain polarization, and the simplified expression has a well precision in the range of terminal guidance. All these results provide the theoretical basis for the prediction of near field angular glint and its signature research.

Citation


Jianpeng Fan, Shijie Fan, Hongqi Fan, and Huaitie Xiao, "An Analytic Expression for Near-Field Angular Glint Prediction of Radar Sensor Using Far-Field Scattering Centers Models," Progress In Electromagnetics Research M, Vol. 30, 225-238, 2013.
doi:10.2528/PIERM13032105
http://jpier.org/PIERM/pier.php?paper=13032105

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