Method of adjusting a frequency response in a ladder-type electr

Details Method of adjusting a frequency response in a ladder-type electr Method of adjusting a frequency response in a ladder-type electr

1995-03-06

1996-10-29

Lee, Benny

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333189, 333188, H03H 9205, H03H 958

Patent

active

055700705

ABSTRACT:
A method of adjusting a frequency response in a ladder-type electric filter having a pair of parallel resonators and a pair of strip-shaped series resonators arranged in a predetermined manner to form a fundamental filter circuit in which at least one of corner portions of each of the strip-shaped series resonators is beveled without changing its length L to regulate its resonance frequency so that the device can be stored within a case without displacing it from its proper position and held in contact with a contact at its node of vibration.

REFERENCES:
patent: 4353045 (1982-10-01), Matsui et al.
patent: 4639698 (1987-01-01), Nishiki
patent: 5105173 (1992-04-01), Itou
patent: 5130680 (1992-07-01), Nagai et al.
patent: 5260675 (1993-11-01), Ogawa et al.
patent: 5426401 (1995-06-01), Ogawa et al.

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