Research on Radiation Emission of CPU Thermal Design

CPU is the key to achieving optimal performance for any operating system. The highest temperature which a CPU can operate without interruption is 90 °C. Heat sink fans generally provided for removal of heat produced by the processor. However, the situation is different when energy is coupled to the heat sink. The size of the heat sink cannot be ignored compared to the wavelength. When the natural frequency of the heat sink is close to the clock signal frequency of the CPU, the heat sink exhibits strong radiation, which easily causes electromagnetic interference to the surrounding environment. This paper focuses on the radiation characteristics of the heat sink to find out the general rule and provide the basis for the design and selection of the radiator.