Narrow-aperture chirp transducers for SAW convolvers

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Narrow-aperture chirp transducers for SAW convolvers

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© The Institution of Electrical Engineers
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Narrow-aperture SAW beams can be generated efficiently using chirp transducers, thus avoiding the need for beam compression in convolvers. The transducers can be designed such as to compensate for phase errors due to dispersive SAW propagation. Experimental confirmation was obtained using convolvers with 120 MHz bandwidth and 16 μs interaction length, and a bilinearity factor of −65 dBm was achieved.

Inspec keywords: ultrasonic transducers; surface acoustic waves; surface acoustic wave devices

Other keywords: VHF; phase error compensation; 120 MHz bandwidth; dispersive SAW propagation; SAW convolvers; UHF; narrow-aperture chirp transducers

Subjects: Acoustic signal processing; Transduction; devices for the generation and reproduction of sound; Acoustic wave devices

References

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      • Smith, W.R.: `Broadband amplitude and phase-compensating transducers for monolithic convolvers', IEEE ultrasonics symp., 1980, p. 59–64.
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