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:
Jul. 02, 1991
Filed:
Mar. 21, 1988
Applicant:
Inventors:
John J Stangel, Mahopac, NY (US);
Richard J Katz, Oceanside, NY (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q / ;
U.S. Cl.
CPC ...
343771 ;
Abstract
A limited scan antenna wherein radiating element and phase requirements are reduced by positioning the radiating elements to radiate through a radial waveguide. The longer wavelength in the radial waveguide relative to the free space wavelength permits a wider actual separation, while maintaining grating lobe suppression. Wave refraction at the interface of the radial waveguide with free space is a function of the guide wavelength and determines the maximum scanning capability of the antenna.