Optimum Design of Energy Selective Surface Parameters for Low Start-Up Field Intensity

Abstract

Reducing the start-up field intensity of the energy-selective surface and optimizing the parameters of the energy-selective surface are of great significance to the protection of the RF front-end circuit with low electromagnetic sensitivity. This paper based on the field circuit equivalent method and CST simulation, the relationship between the threshold of energy selective surface and the size of the periodic unit and the impedance characteristics of the PIN diode is studied. It is found that the coupling voltage at both ends of the diode increases with the increase of the periodic size of the Energy Selected Surface (ESS) unit, and the shielding efficiency of ESS decreases. The thinner the intrinsic layer of the PIN diode, the lower the starting threshold of the PIN diode, but at the same time, the thickness of the intrinsic layer limits the maximum affordable power of the PIN diode. Finally, the ESS of the square metal array is designed under the condition of ensuring the shielding efficiency. The parameters of the ESS are optimized to reduce the start-up field intensity of the energy selective surface, and its protective performance is verified by experiments.