Radar-Absorbing Materials for Spacecraft
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r-Absorbing Materials for Spacecraft V. Yu. Kirillova, *, P. A. Zhukovb, S. Yu. Zhuravlevc, and M. M. Tomilina aMoscow
Aviation Institute (National Research University), Moscow, Russia Moscow Experimental Design Bureau Mars, Moscow, Russia c Research and Production Enterprise Radiostream, Moscow, Russia *e-mail: [email protected] b
Received May 29, 2019; revised January 22, 2020; accepted March 5, 2020
Abstract—This article presents the results of experimental studies of properties that are resistant to abnormal high and abnormally low temperatures of samples of the radio-absorbing material VTMV-1C. Based on the studies, it was concluded that the radar-absorbing material can be used to attenuate reflected waves of electromagnetic fields from various parts of the spacecraft structure and to reduce the levels of resonance phenomena of the electromagnetic field in the modules and cases of onboard instruments and devices of spacecraft. DOI: 10.1134/S0010952520050068
Onboard instruments and devices of spacecraft can, in the process of operation, create radiated electromagnetic interference (EMF) in the form of electromagnetic fields with different frequencies and intensities [1–4]. On spacecraft subject to intense electrification, emitted pulsed electromagnetic fields can also be generated by electrostatic discharges [5]. The electromagnetic environment onboard the spacecraft is formed as a result of radiated interference emission and reflection of radiated electromagnetic fields from the onboard instrument housings and spacecraft design elements. Reflections of radiated EMFs create an electromagnetic environment (EMO) in the interior of the spacecraft structure and in the outer vicinity in the form of an unevenly distributed electromagnetic field with local areas of high tension. The emergence of areas with high tension leads to the appearance of induced conductive EMFs in the onboard cable network, due to which the quality of functioning of onboard instruments and spacecraft devices may decrease [6]. A decrease in the levels of emitted electromagnetic fields onboard a spacecraft can be achieved by using various types of radio-shielding materials, for example, flexible metallized materials [7, 8]. In addition to radio-shielding materials (RSMs), the use of radio-absorbing materials (RAMs) on board the spacecraft allows one to change the electromagnetic environment by reducing the levels of electric field emitted by EMF. Radar-absorbing materials are widely used in microwave technology for the equipment of anechoic chambers or for coating electronic equipment [9]. The use of an RAM on board the spacecraft results in a decrease in the levels of reflected radiated electromagnetic fields in the form of high-frequency electromag-
netic fields when placing and fixing RAM elements on module housings, onboard instruments, and spacecraft structural elements. This allows one to reduce the levels of resulting electromagnetic interference created by the application of emission electromagnetic interference and electromagnetic interf
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