Моделирование широкополосного усилителя на печатной плате с диэлектриком повышенной проводимости

Известия вузов. Электроника. РФ. 2022. Т. 27. № 5. С. 635–644.

Абрамешин Д.А., Пожидаев Е.Д., Саенко В.С., Тумковский С.Р.

The electrons of the cosmic plasma act on spacecraft, causing the electrification of their dielectric materials. The result of the accumulation of charge is the occurrence of electrostatic discharges leading to failures in the operation of on-board radio electronics, and this phenomenon significantly reduces the duration of the active existence of spacecraft. One of the promising methods of protection against the effects of electrostatic discharges is the use of composite polymer dielectrics with increased conductivity. In this work, the results of modeling the characteristics of a broadband amplifier made on a printed circuit board using such a composite dielectric are presented. The resistances have been added to the model of electrical processes occurring in this amplifier, characterizing current leaks from the circuit nodes to the zero conductor, due to a decrease in the specific volume resistance of the printed circuit board material. A computer simulation of a broadband amplifier and an experimental study of its performance characteristics in the operating frequency band of 0.5-70 MHz were carried out. It was demonstrated that the change in bandwidth and gain occurs only when the conductivity becomes higher than 6 · 10-4 Ω-1 · m-1. The results of an experimental study of a broadband amplifier have shown that the proposed model of accounting for the specific volume resistance of the printed circuit board material adequately describes its characteristics. The fact that even with a conductivity of 10-9 Ω-1 · m-1, the possibility of electrostatic discharges is excluded indicates the possibility of protecting broadband amplifiers as part of radio electronic devices of spacecraft from electrification when using composite dielectrics with increased conductivity.

Keywords: математическое и компьютерное моделирование, космические аппараты, радиоэлектронная аппаратура, computer modeling, электростатические разряды, radiation electrization, радиационная электризация, SPACECRAFT RADIO ELECTRONIC DEVICES, ELECTROSTATIC DISCHARGES, COMPOSITE POLYMER DIELECTRICS WITH INCREASED CONDUCTIVITY, композитные полимерные диэлектрики с повышенной проводимостью

Publication based on the results of: Theoretical and experimental studies of electronic and photonic processes in promising heterogeneous structures designed for polymer and perovskite photoconverters in order to increase the efficiency and stability of device characteristics (2022)