Surface acoustic wave (saw) devices

Details Surface acoustic wave (saw) devices Surface acoustic wave (saw) devices

H - Electricity

03

H

333/79, 349/59.1

H03H 17/00 (2006.01) H03H 9/145 (2006.01) H03H 9/42 (2006.01) H03H 9/64 (2006.01)

Patent

CA 1178667

SURFACE ACOUSTIC WAVE (SAW) DEVICES Abstract of the Disclosure To enable increased power coupling into a SAW device for which voltage breakdown is a limiting factor in determining the maximum power which can be coupled, each transducer of the SAW device is replaced by a plurality of series-connected inter-digital transducers (IDTs). For operation in an Nth harmonic mode, there may be N series-connected IDTs which are offset from one another by l/N wavelengths of the fundamental frequency for which the individual IDTs are designed; for high frequency SAW devices this further increases the power which can be coupled into the device. The SAW device is particularly useful in a delay-line oscillator to constitute a microwave source for a local oscillator in a radio repeater. - i -

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