Dina V. Vasil'eva1, Viktor F. Mikhaylov2

1,2 Saint Petersburg State University of Aerospace Instrumentation (SUAI) (St. Petersburg, Russia)

 dolli.dina@mail.ru,  vmikhailov@pochta.tvoe.tv

For protection from high-temperature aerodynamic heating, the on-board antennas of reentry spacecraft are covered with heatresistant radio-transparent thermal protection. Aerodynamic heating, in addition to the actual heating of the antenna thermal protection up to melting, causes the formation of a plasma formation covering the antenna. Thus, the antenna emits media through a multilayer medium: solid heat shield, melt heat shield, plasma. The effect of the multi-layer environment covering the antenna often leads to the loss of radio communications on the descent trajectory. The assessment of the presence of radio communication is possible only on the basis of the results of the study of the interaction of an electromagnetic wave with a multilayer dielectric medium. The work investigates the radiation of a plane wave through a multilayer dielectric medium. Expressions are obtained for the complex transmission and reflection coefficients of a three-layer medium, one of the layers of which is a plasma formation. The developed analytical relationships characterizing the interaction of an electromagnetic wave with a multilayer dielectric medium make it possible to determine the characteristics of the board-to-ground communication channel and the presence or absence of radio communication on the descent trajectory.

Vasil'eva D.V., Mikhaylov V.F. Interaction of an electromagnetic wave with a plane-layered medium. Achievements of modern radioelectronics. 2020. V. 74. № 11. P. 69–73. DOI: 10.18127/j20700784-202011-02. [in Russian]

1. Martin Dzh. Vkhod v atmosferu. M.: Mir. 1969. [in Russian]
2. Matsumoto M., Tsutsumi M., Kumagai N. Millimetre-wave radiation characteristics of a periodically plasma-induced semiconductor waveguide. Electronics Letters (1986). V. 22(13). P. 710–711.
3. Golden R., Hanawalt H., Ossman W. The predication and measurement of dielectric properties and RF transmission through ablating boron nitride antenna windows. AIAA 16 the thermophysics conference. June 1981. P. 46–53.
4. Bachynski M.P., Clouter R.F. Antenna Radiation Pattern in the Presence of a Plasma Sheath. Electromagnetic Aspects of Hypersonic Flight/ New York/ Spartan Books. 1964. P. 169–195.
5. Mikhaylov V.F., Pobedonostsev K.A., Bragin I.V. Prognozirovanie ekspluatatsionnykh kharakteristik antenn s teplozashchitoy. SPb.: Sudostroenie. 1994. [in Russian]
6. Brekhovskikh L.M. Volny v sloistykh sredakh. M.: AN SSSR. 1957. [in Russian]
7. Bekefi Dzh. Radiatsionnye protsessy v plazme. M.: Mir. 1971. [in Russian]