Optimization of natural convection performance of active antenna unit heat sink
Aiming at the demand for efficient heat dissipation of active antenna units in 5G base stations,a heat sink com-bining displacement design and notch design was proposed to establish a model of solar radiation and natural convection,the heat flow field of heat sinks with different notch structures was simulated,and the optimal notch structure using different experimental methods was further investigated.The results show that the maximum temperature of the radiator increases with the increase of notch length,and first decreases and then increases with the increase of notch height and notch-substrate distance.The interac-tion between notch length and notch height on the maximum temperature is most significant.Comparing with different experimen-tal optimization methods,multi-objective optimization is more effective than single-factor and orthogonal methods,and simul-taneous multi-objective optimization can be achieved.Compared with the conventional radiator,the multi-objective method can realize 6.54％and 7.19％reductions in the maximum and average temperatures,respectively,and 4.54％weight reduction in fin mass.
Active antenna unitNatural convectionStructural optimizationNumerical simulation
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