Longitudinal-mode mechanical bandpass filter

Details Longitudinal-mode mechanical bandpass filter Longitudinal-mode mechanical bandpass filter

1975-08-25

1976-09-28

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

333 72, H03H 904, H03H 926

Patent

active

039835162

ABSTRACT:
A mechanical bandpass filter employs bar resonators operated in a longitudinal mode of vibration which are aligned in parallel array along their longitudinal axes by rigidly joining them together with at least two support rods at their aligned nodal planes, the number and location of nodal planes being determined by operating the filter in a bandpass frequency range which corresponds to one of the harmonic longitudinal-mode resonant frequencies. Piezoelectric transducers affixed to the longitudinal surfaces of two resonators provide means for mechanically driving the resonator assembly from an electrical input signal and for extracting an electrical output signal.

REFERENCES:
patent: 2814785 (1957-11-01), Burns, Jr.
patent: 3142027 (1964-07-01), Albsmeier et al.
patent: 3146415 (1964-08-01), Albsmeier et al.
patent: 3792382 (1974-02-01), Guenther

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