G - Physics – 06 – G
Patent
G - Physics
06
G
333/58, 349/59.1
G06G 7/195 (2006.01)
Patent
CA 1218121
Abstract of the Disclosure A system for processing of multifrequency input signals to provide a Fourier transform output is provided which can, for example, partition a wide input frequency band into a number of narrow bands and concurrently detect the presence of one or more signals of different frequency in the input. An array of input wave energy transducers is energized with the broadband signal, and by virtue of progressive shifting of the transducers relative to the propagating medium (such as a surface acoustic wave sub- strate) generates one or more composite wavefronts dispersed at frequency dependent angles. An array of output trans- ducers are disposed along a focal region, each responding to wave energy within a specific frequency range received at its location due to dispersion of the composite wavefront. Such systems preserve phase coherence while responding to multiple input frequencies, but are compact and mass pro- ducible at relatively low cost.
460609
Gowling Lafleur Henderson Llp
Trw Inc.
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