Abstract:n order to get better temperature uniformity for phased array radartransmitter/receiver (T/R) module with high calorific power, a liquid cooling plate withopposite-parallel flow channel is designed, Thermal simulation for S-channel, tree-channeland opposite-parallel channel cooling plate is carried out based on lcepak software. Theantenna array temperature and standard deviation of temperature distribution among threetypes of cooling plate is compared, The results show that the opposite-parallel flow channelcooling plate has best performance of cooling and temperature uniformity. It providesguidance for the temperature uniformity design of liquid cooling plate flow channe. forphased array radar.