Wave transmission lines and networks – Coupling networks – Delay lines including elastic surface wave propagation means
Patent
1982-09-29
1984-08-28
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Delay lines including elastic surface wave propagation means
332 2, 332 52, 333195, 333196, 357 26, 364821, H03H 964, H03H 930, H03H 1502
Patent
active
044686390
ABSTRACT:
A novel technique for fabrication of a new class of surface acoustic wave (SAW) signal processing devices. Substrates of non-piezoelectric silicon or weakly piezoelectric gallium arsenide are prepared and a thin film of a piezoelectric material, such as zinc oxide, is deposited on the substrate. Interdigital transducers are fabricated at each end of the device to inject/receive SAW signals. A row of P-N diodes is constructed in the substrate underneath the SAW beam path and a metal electrode is deposited on top of the zinc oxide film. The diodes may be serially addressed/controlled by a variety of devices external to the SAW beam path, but fabricated on the same substrate and the new device used to provide transformation between high-frequency signals and low-frequency signals having the same time-bandwidth product.
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Green Jonathan B.
Kino Gordon S.
Beers R. F.
Craig G. L.
Curry C. D. B.
Nussbaum Marvin L.
The United States of America as represented by the Secretary of
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