Ceramic duplex filter

Details Ceramic duplex filter Ceramic duplex filter

1994-04-29

1996-04-30

Lee, Benny

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333202, 333206, 333207, H01P 1213, H01P 1201

Patent

active

055128661

ABSTRACT:
A ceramic duplex filter is provided. The duplex filter (10) has a filter body (12) of a dielectric material, and has a top (14), bottom (16) and side surfaces (18, 20, 22, and 24) with through-holes extending from the top (14) to the bottom surface (16). Receptacles are positioned adjacent to the top surface (14) with a conductive material therein. The surfaces (16, 18, 20, 22 and 24) are substantially covered with a conductive material defining a metallized layer (25), with the exception that the top surface (14) is substantially unmetallized. The receptacles include a conductive layer of material to define a certain capacitance. And, coupling devices (94, 96 and 98) for coupling signals into and out of the duplex filter (10) are provided. Shunt, series and coupling capacitors are strategically positioned adjacent to the top surface (14), which help to facilitate tuning of the filter.

REFERENCES:
patent: 4742562 (1988-05-01), Kommrusch
patent: 5004992 (1991-04-01), Grieco et al.
patent: 5146193 (1992-09-01), Sokola
patent: 5177458 (1993-01-01), Newell et al.
patent: 5327110 (1994-07-01), Block

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