Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1977-05-25
1978-12-05
Smith, Alfred E.
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
310313, 333 30R, H03H 904, H03H 926, H03H 932, H01L 4110
Patent
active
041288190
ABSTRACT:
A surface elastic wave device comprising a substrate of an insulating material, a thin film of a piezoelectric material provided on said substrate, input transducer means for transmitting surface elastic wave, and output transducer means for receiving the surface elastic wave. At least one of the input and output transducer means includes a comb-like electrode which comprises interdigital fingers, and a plurality of electrodes which extend across the interdigital fingers in opposing relationship with the comb-like electrode, with the thin film being interposed between the plurality of electrodes and the comb-like electrode. The output transducer means may be arranged to receive or eliminate only surface elastic wave which is permitted to propagate in a direction which is different from that perpendicular to the longitudinal direction of the aforementioned interdigital fingers.
Kusakabe Takaaki
Moriizumi Toyosaka
Shiokawa Showko
Yasuda Tsutomu
Nussbaum Marvin
Smith Alfred E.
Toko Inc.
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