Wide band low loss acoustic wave device

Details Wide band low loss acoustic wave device Wide band low loss acoustic wave device

1976-05-24

1978-09-12

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

333 30R, H03H 926, H03H 902, H03H 930

Patent

active

041141199

ABSTRACT:
A surface acoustic wave device having substantially all of the surface wave energy produced at an input transducer coupled to the output utilization means. Plural reflecting means upon the surface of a piezoelectric substrate reflect surface waves produced by the input transducer in plural directions. The passband characteristics of the device are determined by the interaction of the transfer properties of each of the reflecters as well as those of the input and output transducers. Devices are described having extremely low insertion loss and wide bandwidth with low sidelobes and steep passband skirts.

REFERENCES:
patent: 3883831 (1975-05-01), Williamson et al.
patent: 3886504 (1975-05-01), Hartmann et al.
patent: 3961293 (1976-06-01), Hartmann et al.
patent: 3967221 (1976-06-01), Cooper et al.
patent: 3970970 (1976-07-01), Worley
patent: 3983517 (1976-09-01), Weglein
patent: 4023124 (1977-05-01), Parker et al.
Mason et al., "Physical Acoustics" vol. VII Academic Press New York 1970; Title Page and pp. 250-257, 263-268.

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