The structural configuration and thermal design of the high-power solid-state transmitter of a radar are introduced,and the welding technology and machining methods are also presented in this paper.Based on the power dissipation and layout of power amplifier components,power supplies and microwave-synthetic waveguides,the liquid-cooling methods and heating simulation are determined and performed.Firstly,the coolant flows of single modules are worked out based on heat balance equation,and then the structural optimization design are performed.Subsequently,the key structural parameters of spreader plates are achieved based on that the cold-plates are equivalent to two-port flow resistance device in the Flomaster software.Finally,detailed parametric sim-ulations are performed with FloEFD combined with engineering practice,and then the temperature on the surface of device and modules are also achieved.The results clearly demonstrate that both the highest temperature and temperature consistency of chips meet the use requirements.Accordingly,it is proved that the overall structure and cooling solution are possible.
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