The active/passive heatsinks have recently garnered much attention due to their benefit to keep the temperature of the electronic device and PCB/ICs in a certain range. They are expected both to perform a maximum cooling thermally and to have a minimum of the radiation in electromagnetic terms since it causes electromagnetic interference (EMI) in devices around. In this paper, many studies discussing the EMI performance of natural convection heatsinks in the literature are investigated. Especially in devices operating at high frequencies, these structures behave like semi-antennas if their electrical dimensions are comparable to λ-λ/20 wavelengths. Accordingly, they act as both a monopole and a patch antenna. To eliminate the EMI effect from a heatsink, the grounding, shielding, and filtering techniques are studied. In the literature, the grounding methods are studied up to 2 GHz and it is determined that it provides improvement up to 12 dB. For 1–40 GHz, it is possible to have up to 20 dB improvements in EMI by using absorbers and shielding methods. Finally, the effects of heatsink geometry, design parameters, fin-types, and excitation points on RE are discussed.

有源/无源散热器最近因其有助于将电子设备和 PCB/IC 的温度保持在一定范围内而受到广泛关注。它们既能实现最大程度的热冷却，又能将电磁辐射降至最低，因为电磁辐射会对周围的设备造成电磁干扰 (EMI)。本文对文献中许多讨论自然对流散热器 EMI 性能的研究进行了调查。特别是在高频运行的设备中，如果这些结构的电气尺寸与λ-λ相当，那么它们的行为就像半天线/20 波长。因此，它们既充当单极天线又充当贴片天线。为了消除散热器的 EMI 效应，研究了接地、屏蔽和滤波技术。文献中研究了高达 2 GHz 的接地方法，并确定其可提供高达 12 dB 的改进。对于 1–40 GHz，通过使用吸收器和屏蔽方法可以将 EMI 改善高达 20 dB。最后，讨论了散热器几何形状、设计参数、翅片类型和激励点对 RE 的影响。