Heating of wave guides of spacecrafts of communication by transfer of SHF-signals

In the course of transfer on a wave guide of SHF-signals owing to inevitable losses there is its heating. The carried-out review of the existing literature on this problem showed that the accounting of allocation of heat wasn't carried out so far. At operation of the spacecraft in an orbit of opportunity for dispersion of excess heat in the conditions of an outer space are very limited, especially at not tight execution when all its elements and systems are affected by sunlight, and the convective exchange is practically absent.

The analysis of this phenomenon showed, process of heating can be broken into two stages: warming up thin skin layer and heating of all design of a wave guide.

At the first stage during a small initial stage of time there will be an intensive heating a skin layer due to course in it the induced cur- rents. Accepting that reduction of power of the signal transmitted on a wave guide will happen only because of its transformation to thermal energy, this process will be adiabatic and its calculation is carried out under the law of Joule-Lenz.

At the second stage, in process of warming up of walls of a wave guide, its temperature state will be influenced by heat exchange with environment therefore for calculation of a temperature field of a wave guide the heat conductivity equation with the boundary conditions which are defined by service conditions of wave guides as a part of spacecraft of communication in an orbit is used differ- ential. The received results of calculations showed need of the accounting of allocation of heat by transfer of the SHF-signals of high power.