Electro-mechanical filter including mechanical resonator

Details Electro-mechanical filter including mechanical resonator Electro-mechanical filter including mechanical resonator

1979-06-25

1982-01-05

Lieberman, Eli

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333198, H01Q 950

Patent

active

043096808

ABSTRACT:
An electromechanical filter having mechanical resonators which is used as a channel filter for a mobile radio communication receiver and a carrier telephone. The electromechanical filter is provided with exciter means, each of which is composed of a transducer and an exciter formed as a unitary structure and has the both functions. Each exciter means is a bar-shaped piezoelectric ceramic having a pair of electrodes deposited on its opposing surfaces and subjected to polarization treatment. The exciter means are mechanically coupled by mechanical coupling means with the mechanical resonators.

REFERENCES:
patent: 3983516 (1976-09-01), Johnson
patent: 4091345 (1978-05-01), Yano et al.
patent: 4100506 (1978-07-01), Ernyei
patent: 4124829 (1978-11-01), Kuenemund

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