Ceramic band-pass filter

Details Ceramic band-pass filter Ceramic band-pass filter

1990-06-01

1992-04-07

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333134, 333202, H01P 1202, H01P 1213

Patent

active

051031973

ABSTRACT:
A dielectric filter is formed from a block of ceramic material with holes extending from a top surface toward a bottom surface. At least the bottom, both ends and one side surface are coated with conductive material. Also, the interior surfaces of the holes are coated with conductive material to form transmission line resonators. The uncoated side surface has an electrode pattern which allows coupling to the filter and between resonators of the filter. The elevation of the electrodes on the side surface between the top and bottom determines whether the coupling is capacitive, mixed inductive and capacitive, or inductive.

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patent: 4896124 (1990-01-01), Schwent
Matthaei et al., Microwave Filters, Impedance-Mathing Networks, and Coupling Structures, McGraw-Hill, pp. 497-506 (1964).
Nagle, "High Frequency Diversity Receiver from the 1930's", Ham Radio, pp. 40-41 (Apr., 1980).

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