Accession Number : ADD000212
Title : Composite Dispersive Filter.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
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