High-power RF device with heat spreader bushing
AssigneeENI Div. of Astec America, Inc.
InventorGary C. Adishian
Life of this patent
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Abstract
A high-power RF feedback resistor assembly includes a flat film resistor or other flat device mounted in thermal communication onto a bushing which is, in turn, mounted directly onto a cooling flange of an associated power transistor. A bushing has a vertical bolt hole through it to receive a threaded screw. The bushing can have a cutout beneath the flat vertical surface on which the resistor is mounted to provide clearance for a printed circuit board.
Claims9
High-power RF device for mounting onto a horizontal heat-conducting flange of a high-power RF transistor which flange is fastened by a threaded screw onto a heat sink plate to draw off waste heat from the transistor, comprising a vertically elongated bushing formed of a metal having high thermal conductivity and having a vertical bolt hole therethrough to receive said threaded screw, a flat horizontal lower surface that mates with an upper surface of said transistor flange, and a flat vertical surface;
- and a flat power electrical element affixed onto the vertical surface of said bushing and bonded in thermal communication therewith so that waste heat generated by said power electrical element in operation passes into said bushing and thence is conducted through said transistor flange into said heat sink plate.
Dependencies are inferred from the claim text.