Electrical filters including coupled resonators

Details Electrical filters including coupled resonators Electrical filters including coupled resonators

1976-01-12

1977-12-27

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

310313, 310366, 333 30R, H03H 904, H03H 926, H03H 932, H03H 1300

Patent

active

040657353

ABSTRACT:
A surface acoustic wave band-pass filter comprising a piezoelectric substrate having on one surface first and second SAW resonators tuned to the same frequency and coupled together. An input transducer is coupled to the first resonator and an output transducer is coupled to the second resonator. Each resonator is preferably formed by two spaced apart aligned grating reflectors and the two resonators are preferably coupled by an array of discrete parallel metallic strips extending between the two cavity resonators.

REFERENCES:
patent: B534991 (1976-01-01), Weglein
patent: 3753164 (1973-08-01), De Vries
patent: 3781717 (1973-12-01), Keunemund
patent: 3836876 (1974-09-01), Marshall et al.
patent: 3882430 (1975-05-01), Maerfeld
patent: 3886504 (1975-05-01), Hartmann et al.

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