Surface acoustic wave delay lines

Details Surface acoustic wave delay lines Surface acoustic wave delay lines

1976-03-26

1977-02-01

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

With impedance matching

310 81, 310 98, 333 72, H03H 926, H03H 930, H03H 932, H01L 4110

Patent

active

040064360

ABSTRACT:
A surface acoustic wave delay line uses a closed loop principle with separate input and output transducers side by side. 3dB Multistrip couplers are introduced to achieve substantially 100% transfer for surface acoustic wave energy from the propagation path associated with the input transducer to the propagation path associated with the output transducer. Several such delay lines can be formed on a single cylindrical body of piezoelectric material and these can then be cascaded with intermediate amplification to form a long delay or a tapped delay.

REFERENCES:
patent: 3831116 (1974-08-01), Davis, Jr. et al.
patent: 3878407 (1975-04-01), Hartemann et al.
patent: 3898592 (1975-08-01), Solie

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