Investigation of Frequency Characteristics of Electromagnetic Interference Attenuation by a High-Frequency Filter in a Frequency Range from 9 kHz to 100 MHz in Aerospace Systems when Operating on a Variable Load

The dependence of the magnitude of attenuation of electromagnetic interference of a radio interference filter in a frequency range of 9 kHz...100 MHz is considered, when the minimum and maximum values of the network equivalent impedance, as well as the internal impedance of the interference generator, can differ by tens of times for symmetrical and asymmetrical interference. The necessary reserves for attenuation of electromagnetic interference are determined in comparison with the attenuation value at the nominal parameters of the network equivalent and the interference generator. It has been proven that the best mass-dimensional characteristics and the magnitude of attenuation of electromagnetic interference are radio interference filters implemented according to the scheme of a two-link L-shaped inverted type, and a single-link T-shaped type.