Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1975-02-27
1976-04-06
Smith, Alfred E.
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
333 72, 333 74, H03H 904, H03H 926, H03H 932
Patent
active
039493261
ABSTRACT:
Electromechanical filters of the type having a plurality of resonators coupled to each other by couplers which make it possible to provide a transmission frequency characteristic with finite-attenuation poles are disclosed. The filters have a first resonator disposed on the input side and a second resonator disposed on the output side of the filter. A plurality of third resonators, at least two in number, are disposed between the first and second resonators. The third resonators are coupled mechanically in parallel to the first and second resonators by a plurality of couplers so that one of the first and second resonators is in reverse phase relationship with one of the third resonators. Also, the coupling coefficients between the couplers differ from each other.
REFERENCES:
patent: 3439295 (1969-04-01), Bise
patent: 3725828 (1973-04-01), Temes
Futami Takehiro
Hayashi Tetsuo
Kanazawa Seiichiro
Yano Takeshi
Nippon Electric Company Limited
Nussbaum Marvin
Smith Alfred E.
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