3mm有源双波束辐射计探测技术

A Study on Detection Technique of 3mm Dual-beam Active Radiometer

针对单波束辐射计仅能识别目标切向中心,定位精度差的不足,提出一种加照射源的双波束辐射计系统,分析系统在目标扫描过程中回波状态的变化,得出不同波束间延迟时间的计算方法,并通过构造欧氏距离来进行目标径向中心的精确识别,最后通过曲线拟和给出测距精度。试验结果表明:该系统距离探测精度高,并能对目标径向中心进行有效识别,初步实现目标的三维定位。

In view that the single-beam radiometer can only identify the tangential center of targets with poor orientation accuracy, a 3 mm dual-beam active radiometer is proposed in this paper. The change of echo state during target scanning is analyzed, calculating method of time delay between different beams is given, the target radial center is accurately identified by euclidean distance and finally distance measurement precision is obtained by curve fitting approach. Test results show the given system can detect distance with high accuracy and identify the target radial center, realizing 3-D orientation initially.