Mechanical filter apparatus having interchanged resonator means

Details Mechanical filter apparatus having interchanged resonator means Mechanical filter apparatus having interchanged resonator means

1983-11-07

1986-02-25

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333186, 333197, H03H 950

Patent

active

045730288

ABSTRACT:
By exchanging the position of the input and output resonator means relative to other resonator elements in a mechanical filter, the lengths of the bridging wires used to control the steepness of the bandpass characteristic of the filter can be reduced. Reducing the length of the bridging wires reduces both flexural spurious mode problems and extensional coupling variation problems.

REFERENCES:
patent: 2662216 (1953-12-01), Klinkhamer
patent: 3577180 (1971-05-01), Albsmeier
patent: 3794938 (1974-02-01), Boelter
patent: 3986151 (1976-10-01), Kanazawa et al.
patent: 4197516 (1980-04-01), Ernyei et al.
patent: 4241321 (1980-12-01), Kasai et al.
Weinberg-"Network Analysis and Synthesis", McGraw-Hill, New York, 1962, pp. 80-86.

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