Acoustic surface wave devices

Details Acoustic surface wave devices Acoustic surface wave devices

1975-07-29

1977-05-10

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

310 98, 333 30R, H03H 904, H03H 926, H03H 932, H01L 4110

Patent

active

040231240

ABSTRACT:
A length weighted interdigital transducer has .lambda./2 spaced electrodes within the overlap region. Outside the overlap region, the overlapping .lambda./2 spaced electrodes are connected to the bus bars by pairs of .lambda./4 spaced electrodes and extra "dummy" pairs of .lambda./4 spaced electrodes are also connected to the bus bars. The .lambda./2 spaced electrodes give a good manufacturing yield, and the .lambda./4 spaced pairs of electrodes and pairs of dummy electrodes provide compensation for wavefront distortion combined with low "interactions."

REFERENCES:
patent: 3699364 (1972-10-01), Gerard
patent: 3835422 (1974-09-01), Hartemann

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