Wave transmission lines and networks – Coupling networks – Delay lines including elastic bulk wave propagation means
Patent
1979-07-26
1981-09-29
Lieberman, Eli
Wave transmission lines and networks
Coupling networks
Delay lines including elastic bulk wave propagation means
333149, H03H 930, H03H 940
Patent
active
042926084
ABSTRACT:
An electroacoustic delay line apparatus is disclosed including an acoustic bulk wave generating transducer positioned at one end of a delay line, with a predetermined spacing being provided between the respective electrode elements of the transducer array, such that the acoustic energy radiation from the bulk wave transducers on the end of the delay line interfaces constructively for certain frequencies at selected positions on the sensor transducer surface of the delay line. Therefore each input signal frequency of the acoustic waves is translated into a desired position on the sensor transducer surface of the delay line. The elements of the transducer array are electrically phased such that any electrode element is phase shifted by .pi. radians relative to its nearest adjacent electrode element.
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patent: 4117424 (1978-09-01), Coldren
de Klerk John
Weinert Robert W.
Brodahl R. G.
Lieberman Eli
Westinghouse Electric Corp.
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