Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Patent
1990-01-10
1991-06-25
Williams, Hezron E.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Analysis of complex waves
350 9611, G01R 2316
Patent
active
050270559
ABSTRACT:
An improved compact optical and rugged laser-driven RF spectrum analyzer ng made up of slab-like waveguide means. The waveguide means has at one end enhanced surface diffraction grating means for intercepting and selectively diffracting a laser source beam so that the diffracted laser beam is deflected, expanded and focussed to converge toward the other end and in relation to both a surface acoustic wave (SAW) and detector array means. The waveguide means includes novel combined signal detection and arcuate-shaped transducer (CSD/AT) means between its ends for forming and directing the SAW in response to a detected RF (microwave) signal to be analyzed such that the SAW optically intercepts, interacts and further diffracts in Bragg-Cell-like fashion that converging beam so as to deflect same relative to detector array means at the other end of the waveguide means. The detector array means normally analyzes a series of differently deflected beams so as to provide frequency distribution and intensity of one or more detected signals. A second surface diffraction grating means can be provided on the waveguide means and interposed between the first surface diffraction grating means and the CSD/AT means so as to compensate for aberrations in the converging beam that might otherwise interfere with the detector array means analysis of an optically diffracted source beams.
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Lee John N.
Verber Carl M.
Arana Louis M.
Jameson George
McDonnell Thomas E.
The United States of America as represented by the Secretary of
Williams Hezron E.
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