Bridged electromechanical filters

Details Bridged electromechanical filters Bridged electromechanical filters

1978-04-19

1980-04-08

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333197, H03H 926, H03H 900

Patent

active

041975162

ABSTRACT:
An electromechanical bandpass filter includes at least one real pole consisting of vibrating resonators and couplers between adjacent resonators arranged as filter cells connected in parallel. Each cell includes a coupler and a half of each of the adjacent resonators. At least one bridge extends over at least one resonator and the image mobility of the cells which are spanned by the bridge is equal to the image mobility of the cells in an unbridged electromechanical filter of the same type and having the same passband.

REFERENCES:
patent: 3440572 (1969-04-01), Bise
patent: 3725828 (1973-04-01), Temes

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