三角板角反射器在RCS定标测试中的应用

对三角 板角反射器的散射特性进行分析,提出了其在单站及收发分离单站RCS(Radar Cross Section)定标测试中的应用方案.三角板角反射器后向散射方向图的主瓣部分很宽且很平缓,并具有较强的方位稳定性,适用于较大RCS目标的单站定标测试.但在收发分离的单站RCS定标测试系统中,发射馈源与接收馈源间存在一个小双站角,这会使得三角板角反射器散射方向图的主瓣部分急剧下降,并呈现较强的纹波,从而无法利用其进行精确定标.而其散射方向图的某一旁瓣部分,在存在小双站角时的变化不大,且同样具有较强的方位稳定性,故可利用旁瓣峰值作为收发分离单站RCS测试中的定标参考点.

Application of the trihedral corner reflector in RCS calibration test

The scattering properties of the trihedral corner reflector was analyzed, and its application plans in monostatic radar cross section(RCS) calibration test and transmit-receive separate monostatic RCS calibration test were proposed based on the analysis. The main lobe of the backscattering pattern of the trihedral corner reflector is broad and flat, and it has strong aspect stability, so it is suitable to the monostatic calibration test for the targets with large RCS. But in the transmit-receive separate monostatic RCS calibration test system, due to the small bi-static angle between the transmitter feed and the receiver feed, the main lobe of the backscattering pattern of the trihedral corner reflector sharply drops and presents strong ripple, so it could not be used to calibration test in this situation. Nevertheless, one side lobe of the backscattering pattern almost no changes when the small bi-static angle is existent, and it also has strong aspect stability, so it could be used as the calibration reference point in the transmit-receive separate monostatic RCS calibration test.