Ceramic filter with channeled features to control magnetic coupl

Details Ceramic filter with channeled features to control magnetic coupl Ceramic filter with channeled features to control magnetic coupl

1995-03-24

1997-02-11

Lee, Benny

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333222, 333206, H01P 1205

Patent

active

056025181

ABSTRACT:
A ceramic filter (120) with at least one transmission zero is disclosed. The filter (120) has a filter body comprising a block of dielectric material and having top (110), bottom (112), and side surfaces, and having metallized through-holes extending from the top to the bottom surfaces defining resonators. The surfaces are substantially covered with a conductive material defining a metallized layer. The top surface (110) is uncoated. The filter (120) can also include input-output pads ( 104, 106). The bottom surface (112) has a channel (108) defining a magnetic coupling between the resonators. The channel configuration and placement can vary depending on the desired frequency response.

REFERENCES:
patent: 4806889 (1989-02-01), Nakano et al.
patent: 5327109 (1994-07-01), Hoang et al.

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