ECM/ECCM Evaluation Program. Volume 6. Large Aperture Adaptive Array Study.

摘要

This report is concerned with the problem of protecting a large phased array radar from the effects of electronic countermeasures (ECM). The context of the problem is the defense of strategically important targets from ballistic missile attack,the radar being one of the key sensors in the defense system. A continuation of previously reported work,this study investigated the feasibility of using a partially adaptive array to emulate,as nearly as possible,the performance of the fully adaptive array. A partially adaptive array would be less expensive to fabricate and less complex and,therefore,would be capable of more rapid response. This study was divided into three parts. The results of these studies have shown that there are several partially adaptive array configurations which show promise of providing the protection needed against sidelobe jamming. Further,response time of these arrays can be controlled to within acceptable limits. There does not,however,appear to be a simple solution to the requirement for precision in the fabrication of the partially adaptive array. Array errors would seem to pose a fundamental limitation to this approach.