Surface acoustic wave devices

Details Surface acoustic wave devices Surface acoustic wave devices

1975-08-01

1976-08-17

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

With impedance matching

310 81, 310 98, 333 72, H03H 926, H03H 930, H03H 932, H01L 4118

Patent

active

039756971

ABSTRACT:
A surface acoustic wave device comprises a substrate able to support surface acoustic waves, an input transducer for launching surface acoustic waves along a first track on the substrate, an output transducer for receiving surface acoustic waves from a second track on the substrate, and first and second reflective array structures arranged to reflect surface acoustic waves from the first track into the second track, the first and second reflective array structures each comprising numerous reflecting strips or grooves arranged parallel to one another in echalon across the first and second tracks respectively. Varying the lengths of the reflecting elements provides weighting of signals passing through the device, and varying the spacing between the reflecting elements provides pulse compression or expansion with a frequency sweep.

REFERENCES:
patent: 3882429 (1975-05-01), Martin
patent: 3883831 (1975-05-01), Williamson et al.
patent: 3893047 (1975-07-01), Lardat

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