Surface-mount filter

Details Surface-mount filter Surface-mount filter

1989-12-22

1991-06-11

Laroche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333134, 333202, 455 78, H01P 1202, H04B 150

Patent

active

050235800

ABSTRACT:
A filter assembly (100) includes a ceramic block filter (102) and shielding bracket (132) which surface mounts to a printed circuit board (152) for interconnecting to radio frequency devices, such as a radio transceiver. The bracket (132) is soldered to the filter (102) and includes two openings (136 and 137) for exposing input/output electrodes (106 and 107) of the filter. The printed circuit board (152) includes an opening (162) shaped to accept the filter (102) and bracket (132) when inserted therein. Transmission lines (156 and 157) are disposed on tabs (158 and 159) and are reflow soldered to the corresponding electrodes (106 and 107) of the filter. The bracket (132) includes two tabs (134) which are reflow soldered to grounded portions of the circuitry on the top side of the printed circuit board (152).

REFERENCES:
patent: 4431977 (1984-02-01), Sokola et al.
patent: 4464640 (1984-08-01), Nishikawa et al.
patent: 4673902 (1987-06-01), Takeda et al.
patent: 4703291 (1987-10-01), Nishikawa et al.
patent: 4713633 (1987-12-01), Saito et al.
patent: 4716391 (1987-12-01), Moutrie et al.
patent: 4742562 (1988-05-01), Kommrusch
patent: 4745379 (1988-05-01), West et al.
patent: 4758808 (1988-07-01), Sasaki et al.

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