| The antenna sidelobe cancelling is an effective measure to restrain active jamming.This paper puts emphasis on the research of the antenna sidelobe adaptive cancelling technology combining closely with the science R&D of signal processor of some type of radar control and guide station. First this paper discusses the research background, the basic theory (comprise adaptive zero controlling theory of antenna pattern, adaptive filter theory basing on LMS algorithm) and realizing means; Secondly, this paper analyses the performance of the technology of the antenna sidelobe cancelling using single auxiliary antenna with single plural weight and studies restriction of some factors to cancelling performance, such as orthogonal of I/Q channels, noise of channel, sensitivity of the main antenna frequency, frequency band and wave path difference between main antenna and auxiliary antenna ,etc. Corresponding formula of cancelling gain is derived and corresponding performance curse is gotten. The conclusion drawn from theoretical analysis make a great help to designing work of the antenna sidelobe cancelling in engineering. Finally, the paper introduces briefly the whole scheme design of signal processor of some type of radar control and guide station. At the same time, combining with technology parameter and tactics requirement of it, this paper introduces the design scheme and realization of software&hardware of the module of antenna sidelobe cancelling of it in detail. And by comparing the result of computer simulation with that of realized by engineering .We find out that the practical result exactly fit to the theoretical result, which testify the reasonableness and feasibleness of the design scheme of the antenna sidelobe cancelling in this paper. To so far,the research achievement has been successfully applied to the signal processor and has displayed satisfied stableness and reliability in all the experiment and adjust of radar control and guide station.
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