A Study on Beam Operation of an Airborne AESA Radar with Uniform Search Performance in Whole Scan Area

Abstract

An Active Electronically Scanned Array(AESA) radar required necessarily as the Fire Control Radar(FCR) of recent fighters has ununiform detection range with regard to scan angle due to scan loss. Although the compensation method of scan loss in an AESA radar with variable dwell time is investigated, the effectiveness of the method in a fighter FCR with multi-function such as search, track, and missile guidance within limited resources should be considered systematically. In this paper, uniform search performance of an AESA radar using variable dwell time with regard to scan angle is derived. We assumed the search load of 50 % for case without changing dwell time in fixed frame time and showed the fighter FCR requirement for multi-function is not satisfied because the search load for the uniform search performance should be increased by about 100 %. On the other hand, in case of increasing the frame time for the uniform search performance and search load of 50 %, degradation of the search performance is shown by 86.7 % compared with the former. Based on these analyses, the effective beam operation strategy on an airborne AESA radar with uniform search performance in whole scan area is described with consideration of frame time, search load and performance as a whole.

Track-Beam Operation Strategy to Improve Track Maintenance Performance of Fighter AESA Radar

“…그러나 [4] . 빔 조향에 의한 스캔 손실 은 dwell time을 증가시킴으로써 보상할 수 있으며 [5] , dwell time 가변을 통해 전 탐색 영역에서 균일한 탐색 성능을 도출할 수 있도록 탐색 빔을 운용할 수 있다 [6] . 신규 [9] .…”