Block filter having high-side passband transfer function zeroes

Details Block filter having high-side passband transfer function zeroes Block filter having high-side passband transfer function zeroes

1992-11-04

1994-07-05

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333202, H01P 1205

Patent

active

053271092

ABSTRACT:
A ceramic bandpass filter (10) that has transmission zeroes above the passband is accomplished without using the top patterning by a block structure that includes a localized mesa (26) formed at the top end of the block that provides increased capacitive coupling between the open circuits and the resonators (30, 32, and 34). This increased top end capacitance provided by the mesa (26) can provide high end or high side transmission zeroes to the characteristic transfer function of the filter.

REFERENCES:
patent: 4506241 (1985-03-01), Makimoto et al.
patent: 4733208 (1988-03-01), Ishikawa et al.
patent: 4937542 (1990-06-01), Nakatuka
patent: 4985690 (1991-01-01), Eguchi et al.
patent: 5208568 (1993-05-01), Sassin

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