一种有源相控阵雷达天线环控系统的设计方法

Design Approach for an Environmental Control System of Active Phased Array Antennas

有源相控阵天线中最主要的热源是T/R组件及其供电电源,其散热问题可通过液冷或风冷方式解决。在采用液冷散热方式的有源相控阵天线中,除T/R组件及电源外,单元控制器、高频接收机以及功分网络等分散分布的低功耗组件也应有相应的散热系统,称之为环控系统。文中将天线框架左右侧边梁的中空夹层分别作为送风静压腔及回风腔,并基于全面孔板送风原理,计算出左边梁侧板的开孔尺寸及数量,再通过合理规划风的流动路径完成有源相控阵雷达天线环控系统的设计。以某有源相控阵雷达为例,利用热仿真分析软件并结合工程实际,对其散热模型进行了仿真分析,得到了天线框架内各低功耗器件的表面温度分布图。结果表明,各热源最高温度满足使用要求,从而验证了该环控系统设计方法的正确性与有效性。

T/R modules and their power supplies are the main heat sources in the active phased array antennas,the effective heat dissipation way of which is liquid cooling or air cooling. In the active phased array antennas adopting liquid cooling,besides the T/R modules and the power supplies,the modules with low power loss located separately such as cell controllers,high frequency receivers and power divider networks also require corresponding heat-dissipation systems called environmental control systems. In this paper,the middle layers of left and right sandwich beams in the antenna structure frames are considered as static pressure cavity for air supply and air returning cavity respectively. Based on the air supply principles of the whole pore-plate,the opening sizes and quantities on the side plate of left sandwich beam are worked out,and then the environmental control system design is accomplished with reasonable planning of the air flow path. Detailed parametric simulations of the heat-dissipation model based on an active phased antenna are performed. According to the simulation result,combined with practice,the surface temperature distribution of the modules with low power loss in the antenna structure frames is obtained. The results clearly demonstrate that the highest temperatures of above heat sources satisfy the operation requirements,which proves the feasibility and reasonability of the design method of this environmental control system.