Accession Number : ADD000212

Title :   Composite Dispersive Filter.

Descriptive Note : Patent,


Personal Author(s) : Whitehouse,Harper John ; Van de Vaart,Herman

Report Date : 05 Mar 1974

Pagination or Media Count : 7

Abstract : The patent relates to a surface-wave device comprising a substrate capable of propagating an acoustic surface wave and a conductive structure disposed upon the substrate, comprising two pairs of sets of interdigital linear electrodes, and a pair of bus bars connected to opposite ends of the sets of electrodes. A material which is to be used as an overlay is chosen in advance. The spacing between any two adjacent electrodes of the sets of electrodes is then varied in a prescribed manner, the spacing of the output pair being a mirror image of the input pair, the unequal spacing causing a modification of the propagation characteristics of the acoustic wave.

Descriptors :   *Acoustic delay lines, *Radiofrequency filters, *Patents, Microwave equipment, Signal processing, Surface waves, Acoustic equipment, Pulse compression, Dispersions, Gold, Thin films, Substrates, Barium titanates, Cadmium sulfides

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE