Acoustic surface wave devices

Details Acoustic surface wave devices Acoustic surface wave devices

1974-09-13

1976-05-04

Wilbur, Maynard R.

Wave transmission lines and networks

Coupling networks

With impedance matching

333 72, H03H 738

Patent

active

039551598

ABSTRACT:
An acoustic surface wave device comprises a launching transducer and a receiving transducer coupled to one surface of a piezoelectric substrate and including means for suppressing spurious signals developed in the receiving transducer due to acoustic surface waves reflected from the ends of the substrate. In one embodiment the electrodes of both transducers are staggered a quarter wavelength at the mid point of their apertures so that waves received direct from the launching transducer arrive in phase at the receiving transducer whereas end reflected waves arrive in antiphase over the two halves of the receiving transducer aperture.

REFERENCES:
patent: 3559115 (1971-01-01), De Vries
patent: 3596211 (1971-07-01), Dias et al.
patent: 3727718 (1973-04-01), Whitehouse
patent: 3757256 (1973-09-01), Whitehouse et al.
patent: 3836876 (1974-09-01), Marshall et al.
patent: 3846722 (1974-11-01), De Klerk

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