Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1985-09-30
1986-09-02
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
29600, 333222, 333238, 333246, 361421, H01P 1203, H01P 708, H01P 1100
Patent
active
046098925
ABSTRACT:
An improved ceramic stripline filter assembly is disclosed which provides optimized performance characteristics by careful control of the gap thickness between the filter halves during the assembly process. The filter arrangement utilizes paddle leads which include central cavities or pocket holes to accept any excess solder during filter assemblage. Close tolerances are thereby obtained regarding the referenced gap thicknesses from filter to filter.
The method of fabricating the stripline filter assembly contemplates the use of a leadframe with the leads extending laterally from a unitary support structure. The leads are then cut or otherwise separated from this integral support after attachment of the leads to the filter body connection points. They may be pre-formed to any predetermined pattern after such separation.
REFERENCES:
patent: Re31470 (1983-12-01), Bedard et al.
patent: 3534301 (1970-10-01), Golembeski
patent: 3617955 (1971-11-01), Masland
patent: 3838367 (1984-09-01), Bex
patent: 4152676 (1979-05-01), Morgenthaler et al.
patent: 4494083 (1985-01-01), Josefsson et al.
Motorola Inc.
Nussbaum Marvin L.
Roney Edward M.
Southard Donald B.
Warren Charles L.
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