Research Of The Topological Structure Of Micro-channel Cold Plate Of Phased Array Antenna

There are many T/R components layout on the array of the phased array antenna,which has a large power density,compact structure and limited cooling space.If the antenna front heat can not be dissipated in time,the T/R components temperature will rise sharply,which will influence the telecommunications performance and result in structural damage.In order to meet the requirements of rising chip temperature inside the antenna,equilibrium temperature distribution of the front and pressure drop,this paper applies micro-channel cooling technology for phased array antenna to control the heat dissipation,and research the micro-channel cold plate topology based on chip level,component level and array level.The specific research contents are as follows:(1)Research on the topology of the chip level bionic micro-channel.In order to improve the heat dissipation capacity of high heat flux chip,a variety of bionic micro-channel topology is designed by using the network topology in natural world with excellent mass and heat transfer characteristics.The numerical simulation method is used to analyze the heat dissipation and pressure drop performance of different topologies.The results show that there are significant differences in heat dissipation capacity between different topologies.The excellent heat transfer performance of the cobweb structure are deduced and demonstrated.The micro-channel radiator is processed by metal 3D printing.The test results show that the heat dissipation capacity and pressure drop are obviously improved compared with the existing flat micro-channels.(2)Research on the topology of the T/R component level micro-channel cold plate.With considering the brick like T/R component antenna,the cooling method of the brick antenna is achieved by the combination of the concentrated cold plate and the dispersed cold plate.The heat dissipation performance of various channel topology are designed and analyzed with T/R components of disperse cold plate.A cold plate structure with excellent heat dissipation performance and good temperature uniformity is proposed in this article.It is used for cooling down the array heat source.Based on the arrangement of T/R components,the asymmetric design of the fractal flow path inside the concentrated cold plate is proposed to eliminate the temperature difference between T/R components.Finally,a thermal control program is proposed to meet the cooling requirements.(3)Research on the topology of the antenna front level cold runner.Based on the performance of the antenna-type active phased array antenna,array of the antenna and distribution of the temperature field,a variety of in-line channel topology are designed in different ways.The numerical simulation method is used to analyze the various heat dissipation performances of the topology,which includes the heat dissipation capacity,temperature uniformity,pressure drop of the inlet and the outlet,and so on.A topological structure of the front runner with integrated heat dissipation performance is designed and experimentally verified.In this paper,a heat dissipation micro-channel cold plate structure of the phased array antenna is studied systematically.It has the ability to keep the surface temperature uniformity in 3?.Its heat dissipation capacity is more than 100W/cm2 and the pressure drop is only 0.3MPa.The innovative achievements are as follows: A new type of micro-fluidic structure for chip cooling is proposed.The cooling capacity is improved by nearly 10% compared with the rectangular straight structure,and the pressure drop of the inlet and outlet is lower.A new type of epicyclic dyestuff parallel cold plate structure and a cold plate structure is designed,which is used for cooling down the array heat source and has a good temperature uniformity.It can be regarded as the reference for all levels micro-channels design inside the phased array antenna cold plate.