APG导热性分析及在雷达中的应用研究

Thermal Conductivity Analysis of Annealed Pyrolytic Graphite and Its Application in Radar

本文对退火态热解石墨(APG)的导热性及在雷达信处板中的散热效果进行了定量分析。首先通过试验测量了APG基板与常用金属基板的散热性能;然后基于试验测试数据,通过建立仿真模型,推导得到APG的导热率;最后基于验证过的仿真模型,分析了APG材料在雷达信处板上的散热效果,结果表明:APG材料的散热性能远远优于常用金属材料。在25W的总热耗功率下,采用APG的铝合金信处冷板与不加APG的铝合金信处冷板相比,APG铝合金信处板最高温度降低了近4℃,其均温性由10℃降低为0.85℃,均温性改善明显,表明APG材料可有效解决雷达产品的散热问题。

In this paper,the thermal conductivity of annealing pyrolytic graphite(APG)and its dissipation effect in radar signal processing boards are quantitatively analyzed.Firstly,the heat dissipation properties of APG substrates and common metal substrates are measured through experiments.Secondly,based on the test data,the thermal conductivity of APG is derived by establishing a simulation model.Finally,heat dissipation effect of the APG material used in the radar signal processing board is analyzed based on the validated simulation model.The results show that the heat dissipation performance of APG material is much better than that of common metal materials.Under a total heat loss power of 25W,the maximum temperature of aluminum alloy signal processing board using APG is reduced by nearly 4℃,and the temperature difference is reduced from 10℃to 0.85℃.It is proved that the APG material can effectively solve the heat dissipation problem of radars.