Planar microwave circuit component mounting system
AssigneeRCA Corporation
InventorMelvin M. Morrison
Life of this patent
Estimating the term…
Abstract
The plane of the leads of a field effect transistor are spaced from a transistor housing surface a distance which may have any value in a given range. The leads are soldered or welded to respective planar conductors of a microwave circuit and the housing is soldered to a heat sink pedestal on a base. The microwave circuit is fixedly secured to the base at one end and adjustably secured to the pedestal at the other end to compensate for the variations in the spacing between the plane of the leads and the housing at that other end.
Claims10
In a planar microwave circuit system including at least one subsystem, said subsystem including a thermally conductive heat sink base;
- an electrically conductive circuit support structure adapted to be secured to said base;
- a dielectric substrate secured to the support structure, said substrate having first and second plane surfaces, one of said surfaces including at least one conductor lying in a first plane and being adapted to receive a lead of a circuit component connected thereon, the other surface including a ground plane conductor which is ohmically connected to said support structure, said lead being spaced a given distance from a mounting surface of the component, the improvement comprising:
- at least one thermally and electrically conductive component receiving surface on said base to which said component mounting surface can be secured, said receiving surface lying in a second plane spaced from the first plane of said one conductor;
- and
- means coupled to said support structure and said base for setting the distance between said first plane and said component receiving surface to substantially the value of said given distance.
A planar microwave circuit system comprising:
- a base member having a component receiving surface;
- first and second electrically conductive supports each having a microwave substrate receiving surface, each support secured at one end to said base member;
- first and second microwave circuits secured to said first and second supports, respectively, each said circuit comprising:
- a planar substrate;
- a planar ground plane on one surface of said substrate ohmically connected to its corresponding support;
- and
- microwave planar signal circuitry on the opposite surface of said substrate;
- each of said signal circuitry including a planar conductor on a surface of said substrate, said planar conductor terminating adjacent said component receiving surface at the other end of the respective support;
- said supports and said base member including means adapted to adjust the spacing of the plane of said planar conductors to said component receiving surface in a direction generally normal to the planes of said conductors.
Dependencies are inferred from the claim text.