Title: Surface acoustic wave devices

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.

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Inventors: Paige, Edward George Sydney (West Malvern, EN)

Application Number: 601687
Filing Date: 1975-08-01
Publication_date: 1976-08-17
Assignee: British Secretary of State for Defence (London, EN)
Primary Class(es): 333/153 310/313D, 310/313R
Other Classes:
US Patent Ref:

3882429	May, 1975	Martin	333/30.
3883831	May, 1975	Williamson et al.	333/72.
3893047	Jul, 1975	Lardat	333/30.

Other Refs:
Primary Examiner: Smith, Alfred E.
Assistant Examiner: Nussbaum, Marvin
Attorney: Pollock; Elliott I.