Wave transmission lines and networks – Coupling networks – Electromechanical filter
Patent
1980-01-03
1982-04-06
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Electromechanical filter
333189, 333190, H03H 954, H03H 958, H03H 952
Patent
active
043238653
ABSTRACT:
There are provided ladder-type piezoelectric filters, wherein each piezoelectric resonator incorporated is arranged to have opposing faces of rectangular dimensions with the ratio of a short side length to a long side length being less than a value of 0.7.
REFERENCES:
patent: 2155035 (1939-04-01), Bieling
patent: 2326923 (1943-08-01), Bokovoy
patent: 3408515 (1968-10-01), Morse
patent: 3601639 (1971-08-01), Hannon et al.
patent: 4066986 (1978-01-01), Takano et al.
Kakehi Sasuga
Tanaka Yasuhiro
Murata Manufacturing Co. Ltd.
Nussbaum Marvin L.
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