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:
Mar. 05, 2002
Filed:
Mar. 19, 1999
Charles M. Powell, Plainsboro, NJ (US);
Radio Frequency Systems, Inc., Marlboro, NJ (US);
Abstract
A space-tapered antenna has a collinear array of radiating elements coupled via a cable feeding system to a Butler matrix feed system. Either the collinear array has compressed rows spaced in a range of ⅜ to ¼ &lgr;, where &lgr; is the operating wavelength of the antenna, the cable feeding system is a phase progression cable feeding system, or both. One 120° space-tapered antenna has eight compressed rows spaced at ⅜ &lgr; for providing six 20° degree beams with −10 dB side lobe suppression. Another 120° space-tapered antenna has eight compressed rows spaced at ¼ wavelength for providing four 30° beams with −15 dB side lobe suppression. A 60° space-tapered antenna has eight compressed rows spaced at ⅜ &lgr; in combination with a 22 ½° phase progression cable feeding system for providing three 20° beams with −14 dB side lobe suppression. One 90° space-tapered antenna has eight compressed rows spaced at ¼ &lgr; in combination with a 22 ½° phase progression cable feeding system for providing three 30° beams with −17 dB side lobe suppression. Another 90° space-tapered antenna has four rows spaced at ½ &lgr; and a 45° phase progression cabling feeding system for providing three 30° beams with −12 dB side lobe suppression.