A Device for an Ultrashort Pulse Attenuation in Common and Differential Modes in the High Voltage Power Supply Circuits of the Spacecraft

The protection of the on-board electronic equipment components of the spacecraft against electromagnetic interference is an actual problem. One of the most dangerous effects is an interfering ultrashort pulse. Therefore, it is necessary to search for new solutions to reduce the dangerous effects of ultrashort pulse propagating in spacecraft power systems on the on-board radioelectronic equipment. In this article, protection of the equipment against an ultrashort pulse based on modal filtering is proposed. The paper presents the results of the development of a device for the decomposition of the ultrashort pulse in high-voltage power circuits of a spacecraft. The device is based on modal filters with broadside coupling and provides an attenuation of the ultrashort pulse with a duration of 0.3 ns by 24.7 times in common mode and 12.3 times in differential mode.