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US 2004/0169554 A1Published application
Device for amplifying a high frequency signal
AssigneeThales
InventorMichel Langlois
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AssigneeThales
InventorMichel Langlois
Estimating the term…
The invention pertains to an amplification device for a high-frequency signal. The invention is particularly adapted for the transmission of radiofrequency signals used for television or radio under frequency modulation. The amplification device for a high-frequency signal, comprises two amplification stages arranged in series, the first amplification stage being formed of a semiconductor preamplifier (200), the second amplification stage being formed of an electron tube (100) cooled by the circulation of a fluid, the electron tube (100) being arranged inside an enclosure (401) intended to receive it. The semiconductor preamplifier (200) is arranged in the enclosure (401), and the preamplifier (200) is cooled by the circulation of the fluid. The electron tube (100) comprises a collector (15) needing to be cooled by the circulation of the fluid, and the fluid circulates around a cooling circuit, in which circuit the collector (15) is connected in parallel with the preamplifier (200).
An amplification device for a high-frequency signal, comprising two amplification stages arranged in series, the first amplification stage being formed of a semiconductor preamplifier (200), the second amplification stage being formed of an electron tube (100) cooled by the circulation of a fluid, the electron tube (100) being arranged inside an enclosure (401) intended to receive it, characterized in that the semiconductor preamplifier (200) is arranged in the enclosure (401), in that the preamplifier (200) is cooled by the circulation of the fluid, in that the electron tube (100) comprises a collector (15) needing to be cooled by the circulation of the fluid, and in that the fluid circulates around a cooling circuit, in which circuit the collector (15) is connected in parallel with the preamplifier (200).
The amplification device as claimed in one of the preceding claims, characterized in that the fluid comprises water and an antifreeze product.
The amplification device as claimed in one of the preceding claims, characterized in that the larger part of the fluid circulating around the cooling circuit cools the collector (15).
The amplification device as claimed in one of the preceding claims, characterized in that the cooling circuit comprises an input branch (310) to which is connected a first input channel (301) conducting all of the fluid circulating around the cooling circuit, a second channel (303) conducting the larger part of the fluid to the collector (15) and a third channel (304) conducting a small part of the fluid to the preamplifier (200), and in that in the input branch (310), the third channel (304) faces the first channel (301).
Dependencies are inferred from the claim text.