Jeffrey M Elliott

US Patent:

47163909, Dec 29, 1987

Filed:

Sep 15, 1986

Appl. No.:

6/907546

Inventors:

Jeffrey H. Elliott - Santa Monica CA
Robert B. Stokes - Torrance CA
David Penunuri - Placentia CA
Kuo-Hsiung Yen - Manhattan Beach CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

H01P 120
H01P 1213

US Classification:

333202

Abstract:

A magnetostatic wave (MSW) device for performing spectral analysis of an input signal containing signal components of very high frequency, well in excess of 1 GHz (gigahertz). An input transducer array couples the input signal to a magnetostatic propagating medium, such as a film of yttrium-iron-garnet (YIG), in such a manner that the array effectively provides multiple wave sources spaced along a predetermined arc on the propagating medium, and the waves combine constructively at frequency-dependent points in a focal region of the medium, spaced apart from the input array. Output transducers located at these frequency-dependent points generate output signals indicative of various selected frequency components of the input signal.

US Patent:

51793091, Jan 12, 1993

Filed:

Feb 4, 1988

Appl. No.:

7/152203

Inventors:

Robert B. Stokes - Torrance CA
Kuo-Hsiung Yen - Manhattan Beach CA
Jeffrey H. Elliott - Santa Monica CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

H01L 4104

US Classification:

310313B

Abstract:

A surface acoustic wave (SAW) chirp signal processor having a piezoelectric substrate, an array of input transducers and an array of output transducers. In its chirp compression mode, the device has chirp signals applied in parallel to its input transducers and produces compressed output pulses at its output transducers, corresponding to selected chirp rates. The input transducers are successively offset with respect to a focal point on the array of output transducers, by distances that successively and linearly increase or decrease from transducer to transducer, consistent with the increase or decrease in the wavelength of the chirp signals. The device may also be used in a pulse expansion mode, by inputting a broadband pulse into a selected one of the output transducers. The input transducers then produce a chirp signal having a rate corresponding the selected to output transducer.