| With the development of active phased array antenna and the increasing of the integration level of corresponding T/R modules, heat dissipation problem caused by high heat flux density and narrow heat dissipation space has been increasingly highlighted. Conventional heat dissipation means haven't met the heat dissipation requirements of active phased array antenna in the future. According to high-density active phased array antenna, a heat dissipation method is proposed based on the micro-channel.Firstly, the ladder shape micro-channel heat sink for millimeter wave active phased array antenna was designed and the mathematical relation between the ladder sizes and channel flow was established.Through the mathematical relation the appropriate ladder sizes were obtained to realize the uniform flow distribution in channels and improve the array temperature uniformity of the active phased array antenna. The temperature standard deviation of the array was decreased from 6.27? to 2.98?. Secondly, an inversion method for the manufacturing factors of the micro-channel made with low temperature co-firing ceramic material was proposed,based on building the optimization model from the array temperature to the micro-channel deformation and the mathematical model from the micro-channel deformation to manufacturing factors?Finally, the experiment of the stainless steel micro-channel for the inversion method was designed and obtained the micro-channel surface temperature. The micro-channel deformation of 0.44 mm was calculated. Compared with the actual channel deformation of 0.5 mm, the accuracy is 88%, which proved the correctness of the inversion method?... |
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