High voltage resistance, particularly for current limitation in a microwave progressive wave tube emitter
AssigneeThomson-CSF
InventorsGuy Colinart, Francois Pacreau
Life of this patent
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Abstract
This invention relates to a high voltage resistance. The resistance comprises at least one organic substrate (21) and a flat conductor (22) with length L, width l fixed to the organic substrate and with a given resistivity ρ and a thickness ε, the value R of the resistance being equal to ρL/le, the values of the length L, width l being defined such that the mass of the flat conductor (22) is sufficient to resist electrical arcing without exceeding a given temperature. This invention is particularly applicable for current limitation resistances in microwave progressive wave tube emitters, used for example in airborne radar systems.
Claims17
High voltage resistance, characterized in that it comprises at least one support (21) and a flat conductor (22) with length L, width l and thickness e fixed to the support and with a given resistivity ρ, the value R of the resistance being equal to ρL/le, the values of the length L, width l and the thickness e being defined such that the mass of the flat conductor (22) is sufficient to resist electrical arcing without exceeding a given temperature.
Resistance according to any one of the previous claims, characterized in that said flat conductor (22) is in the shape of a coil.
Resistance according to any one of the previous claims, characterized in that said flat conductor (22) comprises a nickel alloy.
Resistance according to any one of the previous claims, characterized in that said flat conductor (22) is covered by an insulating layer (32).
Resistance according to any one of the previous claims, characterized in that it comprises connection wires, the ends of which are soldered onto connection strips (25, 26) of said flat conductor (22).
Resistance according to any one of the previous claims, characterized in that it is fixed to the bottom of a ceramic casing (61).
Microwave tube emitter, characterized in that it is equipped with one or several limitation resistances according to any one of the previous claims.
Dependencies are inferred from the claim text.