Wave transmission lines and networks – Plural channel systems – With balanced circuits
Patent
1977-03-18
1978-07-11
Gensler, Paul L.
Wave transmission lines and networks
Plural channel systems
With balanced circuits
333 84M, H01P 512, H01P 100
Patent
active
041005163
ABSTRACT:
A microwave diplexer circuit consists of a stripline conductor carried between two dielectric substrate members, each having a conductive layer serving as a ground plane on its side nonadjacent to the stripline. The substrate members are enclosed in a housing of conductive material including a bottom which contains the substrate members and the stripline conductor, and a top which is fastened to the bottom to make an enclosed unit wherein the housing makes electrical contact with the ground planes. The stripline is formed with a pair of extensions in the form of grounding tabs which extend into small chambers not occupied by the substrate members. In the particular circuit shown, the circuit adjacent the grounding tabs is a high frequency microwave filter including a plurality of stubs. A shorting bar in each of the chambers overlies the tabs and is clamped to the wall of the chamber such that it defines a short at the desired length of each of said plurality of tuning stubs forming the filter. One edge of the shorting bar is of such height that it projects slightly above the chamber. The top housing member includes a slot facing the interior in registry with the projecting edge and filled with conductive rubber such that when the top is fastened to the bottom the edge projects into and penetrates the conductive rubber. This assures a good short or ground from the edge of the shorting bar to the housing and, therefore, to the ground planes.
REFERENCES:
patent: 3553409 (1971-01-01), Lehrfeld
patent: 3560884 (1971-02-01), Moore et al.
patent: 3870974 (1975-03-01), Ohlstein et al.
Gensler Paul L.
Smith Robert C.
The Bendix Corporation
Thornton William F.
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