PMC-based Heatsinks Design with Truncated Cone-shaped Pins to Reduce Unwanted Electromagnetic Radiations

This paper investigates the manufacturability of PMC-based heatsinks containing arrays of pins with more complex geometries, offering an alternative to conventional PMC surfaces with cylindrical pins having a circular cross-section. For this purpose, truncated cone-shaped pin geometries are considered in the designs to achieve the PMC surface characteristics, and the SLS technique is applied for the first time in the manufacturing of the proposed PMC-based heatsinks. Moreover, the simulation results of the PMC-based heatsinks with truncated cone-shaped pins are compared with those of the PMC-based heatsinks with cylindrical pin arrangements, considering the bandgap limit values. Finally, the simulation results of the PMC-based heatsinks with truncated cone-shaped pins are verified through measurements in the frequency range of interest.