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正交对消用于连续波雷达接收机中,可降低接收机输出噪音,提高雷达有效灵敏度,特别是对零频抑制的多卜勒系统用处更大。增强对连续波发射机调频调幅噪音的适应性,稳定连续波雷达的作用距离。正交对消技术如用于雷达的一次混频器又能降低微波平衡混频器的噪音系数,提高接收机灵敏度。文中对正交对消技术作了简单的定性分析,并给出了初步的室内试验数据,供大家参考。
Quadrature pair cancellation in CW radar receivers reduces receiver output noise and increases radar effective sensitivity, especially for Doppler systems with zero-frequency rejection. Enhance the adaptability of FM AM noise for CW transmitters and stabilize the range of CW radar. Orthogonal cancellation techniques such as a mixer for a radar can reduce the noise figure of a microwave balanced mixer and improve the receiver sensitivity. In this paper, a simple qualitative analysis of the orthogonal cancellation technique is made, and preliminary laboratory test data are given for your reference.