Acoustic frequency mixing devices using potassium titanyl phosph

Details Acoustic frequency mixing devices using potassium titanyl phosph Acoustic frequency mixing devices using potassium titanyl phosph

1994-11-21

1996-06-25

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

333132, 310313A, 364821, H03H 900

Patent

active

055304109

ABSTRACT:
Acoustic frequency mixing devices for controlling high frequency signals by the generation of acoustic waves are disclosed. The devices include (a) a crystalline substrate of MTiOXO.sub.4 (wherein M is K, Rb, Tl and/or NH.sub.4 and X is P and/or As) having a surface with at least two input areas; and (b) an input interdigital transducer deposited on each of at least two signal input areas of said substrate surface, each IDT suitable for connection to a source of electric signal and for inverse piezoelectrically generating acoustic waves (e.g., SAWs or B-G waves) in the substrate. For controlling high frequency electrical signals, the substrate surface has a output area and the device typically includes an output electrode (e.g., an interdigital transducer) deposited on the signal output area of said substrate surface suitable for piezoelectrically detecting acoustic waves obtained by mixing the frequencies of waves generated by at least two input interdigital transducers, and for connecting the output electrode to an electric signal responsive device.

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