Surface mount ceramic filter duplexer having reduced input/outpu

Details Surface mount ceramic filter duplexer having reduced input/outpu Surface mount ceramic filter duplexer having reduced input/outpu

1992-10-23

1995-01-03

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333134, 455 78, H01P 1202, H01P 1205, H04B 150

Patent

active

053790111

ABSTRACT:
A ceramic bandpass filter (10) with improved input/output isolation can be surface mounted. Input/output pads (18 and 2) through which electrical signals pass are located on one surface of a block of dielectric material (12) to permit use of the so-called surface mount manufacturing techniques. Slots in the sides of the block that preferably run between the input-output pads can reduce coupling between the input/output pads and permit adjustment of high-side transmission zeroes by changing the dimensions of the slots. No wired connections to the ceramic bandpass filter block are required.

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: 4733208 (1988-03-01), Ishikawa et al.
patent: 4742562 (1988-05-01), Kommrusch
patent: 5146193 (1992-09-01), Sokola
patent: 5208566 (1993-05-01), Kenoun et al.

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