Wave transmission lines and networks – Coupling networks – With impedance matching
Patent
1976-03-04
1977-07-05
Smith, Alfred E.
Wave transmission lines and networks
Coupling networks
With impedance matching
29 2535, 310 83, H03H 930, H03H 926, H03H 932, H01L 4104
Patent
active
040343170
ABSTRACT:
A multiple reflection type solid ultrasonic delay line which comprises a solid ultrasonic delay medium in the form of a thin flat plate having input and output transducers and reflection elements formed on the periphery thereof, and one or more arc grooves provided on part of side surfaces which is other than desirable reflection elements for ultrasonic vibration and a low melting metal or alloy being provided in said arc grooves. In the delay lines, undesirable signals are remarkably attenuated.
REFERENCES:
patent: 2839731 (1958-06-01), McSkimin
patent: 2859415 (1958-11-01), Fagen
patent: 3581247 (1971-05-01), Belford et al.
Igarashi Yutaka
Kanbara Tohru
Uemura Michihiko
Asahi Glass Co. Ltd.
Nussbaum Marvin
Smith Alfred E.
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