Research of a Large Dielectric Plate Antenna Charging in Low-Altitude Polar Orbit Environment

Details Research of a Large Dielectric Plate Antenna Charging in Low-Altitude Polar Orbit Environment Research of a Large Dielectric Plate Antenna Charging in Low-Altitude Polar Orbit Environment

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998sct..conf..143l&link_type=abstract

Proceedings of the 6th Spacecraft Charging Conference. November 2-6, 1998. AFRL Science Center, Hanscom AFB, MA, USA., p.143-146

Computer Science

Scientific paper

This paper reports the study of the charging of a large dielectric plate antenna in low-altitude polar orbit plasma environment. The work presented here consists of three parts. First, the surface charging of the large dielectric plate antenna and its effects due to aurora precipitate electron are analyzed. The antenna surface could charge to kV magnitude because of its thick dielectric plate, and the charging rate of the wake surface is nearly two times of the ram surface. Secondly, a spacecraft charging test equipment with plasma source and electron source was used to simulate the charging environment of the antenna components, and discharge was observed. Finally, in order to minimize risks associated with antenna surface charging, tin oxide (TO) coating based on kapton was applied. It could control surface charging potential below 100V and the insertion loss of the film was less than 0.1dB. TO coating on both sides of kapton can be used to minimize the internal charging level. Keywords: spacecraft charging, antenna, auroral electron environment, electrostatic protection

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