RADIO FREQUENCY DIAGRAM INSTALLED ON BOARD THE SATELLITE CONTAINING A HEAT CONTROL SYSTEM BY USING AN ALARM ALTERED BY POWER REFLECTION

摘要

1. A radio frequency circuit mounted on a satellite, the data being transmitted over several channels using radio frequency signals, with one channel corresponding to one frequency band, and a channel (400, 401) of amplification may be connected to the channel to generate an radio frequency signal for transmission along this channel, and the amplification circuit contains at least one amplifier (404, 409) with a variable gain, and the radio-frequency signals generated in this way are sealed using a compaction device, containing live filters (408, 413) with a passband,! characterized in that the amplification circuits comprise a power load (402, 403) configured to dissipate the power of the signals reflected by the filters of the sealing device, wherein the power load comprises means for generating an alarm signal A (t) representing the power level of the reflected signals, the alarm being used to control the gain of an amplifier (404, 409) with a variable gain. ! 2. The circuit according to claim 1, characterized in that the control modules associated with the amplification circuits contain means (503) for determining predetermined control values of an amplifier with a variable gain of said circuits, the set values being determined by comparing (500) between the value representing the alarm signal A (t), and a predetermined threshold value S.! 3. The circuit according to claim 2, characterized in that the value representing the alarm is the current strength or voltage of the specified signal. ! 4. A circuit according to any one of claims 2 or 3, characterized in that the setpoint generated by the monitoring module is