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采用电荷耦合器件(CCD)模拟延迟线的动目标雷达显示器,是一种新型的动目标显示技术,通常简称CCD—MTI。用国产C_(212)型128位N沟CCD模拟延迟线,设计和试制了一次相消和二次相消CCD—MTI试验样机。一次相消的相消比为30dB,二次相消的相消此可达44.4dB。试验样机能广泛适用于脉冲宽度大于0.5μs,重复频率高于300Hz的动目标显示雷达。本文概述CCD—MTI的原理和组成,详细讨论和分析了设计中的几个重要问题,并且给出性能测试结果和在雷达整机上的使用情况。本文最后还提出了一种可供雷达实用的512位CCD二次相消MTI的设计方案。
Moving target radar displays that use charge coupled devices (CCDs) to simulate delay lines are a new type of moving target display technology, commonly referred to as CCD-MTI. With the domestic C_ (212) 128-bit N-channel CCD analog delay line, a destructive and quadratic elimination CCD-MTI prototype was designed and manufactured. A cancellation of the cancellation ratio of 30dB, the second cancellation of this cancellation up to 44.4dB. The test prototype can be widely used in moving target display radar with pulse width greater than 0.5μs and repetition frequency higher than 300Hz. This article outlines the principle and composition of the CCD-MTI, discusses and analyzes several important issues in the design in detail, and gives the performance test results and the use of the radar on the whole machine. Finally, this paper also proposed a practical radar 512-bit CCD secondary cancellation MTI design.