The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 1976
Filed:
Sep. 26, 1975
Metro M Chrepta, Neptune, NJ (US);
Harold Jacobs, West Long Branch, NJ (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A single element line scanner applicable to millimeter or submillimeter w beam steering which includes a semiconductor waveguide made of a high resistivity bulk single crystal intrinsic semiconductor material such as silicon. Parallel spaced radiator elements are disposed on one major or top surface of the semiconductor waveguide transverse to the direction of wave propagation along the waveguide. Parallel spaced PIN diodes are disposed on the other or bottom major surface of the semiconductor waveguide transverse to the direction of wave propagation. The PIN diodes are spaced close enough to prevent radiation from escaping outwardly from the bottom major surface and are provided with a variable forward bias to produce a conductivity sheet. The conductivity sheet on the bottom major surface is electronically modulated as a function of the bias current for a given frequency and the variation of such a conductivity sheet changes the wavelengths in the semiconductor waveguide. The changing wavelengths provide variable wavelength spacing between the spaced radiator elements. Each variation of wavelength corresponds to a discrete angle of radiation reinforcement from the radiator elements such that there is provided a single radiation lobe pattern which may be scanned through 180 degrees.