Ultrasonic delay line

Details Ultrasonic delay line Ultrasonic delay line

1986-04-23

1987-09-01

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic bulk wave propagation means

333141, 333147, H03H 936

Patent

active

046911782

ABSTRACT:
An ultrasonic delay line including an input transducer for producing a sound wave depending on an input voltage, a delay medium for transmitting the sound wave produced by the input transducer and an output transducer for receiving the sound wave transmitted in the delay medium has a shape such that sound waves transmitted in the delay medium are misdirected with respect to the output transducer by a predetermined amount. As a result, a substantial part of a main signal is input into the output transducer, whereas a substantial part of the sound waves having the third or higher harmonic component with respect to the main signal misses the output transducer due to the higher directivity of these higher frequency components in the delay medium.

REFERENCES:
patent: 3254317 (1966-05-01), Bauer
patent: 3798577 (1974-03-01), Kasahara et al.
patent: 4074213 (1978-02-01), Epsztein et al.
IEEE Transactions on Sonics and Ultrasonics, vol. SU-31, No. 6, Nov. 1984, pp. 26-42; J. E. May: "Characteristics of Ultrasonic Delay Lines Using Quartz and Barium Titanate . . . ".

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