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:
Dec. 09, 2003
Filed:
Nov. 01, 2001
Graham P. Bloy, St. Louis, MO (US);
Locus Technologies, Inc., St. Louis, MO (US);
Abstract
Active high density multi-element antenna system [DS] for radiolocation of RF target radiation has a processor-controlled antenna array [CAA] having rings [R , R , R ] concentric about a central axis to define arcuate sectors S about the central axis, each ring having adjacent p.c. boards [PC , PC , PC ] with PIN diode-switched antenna elements within sectors. The rings provide three rings [E , E , E ] of discrete dipolar elements, defining electrically isolated antenna units [AS ], each radial to the central axis, of quasi-log-periodic configuration. Antenna units are switched in rotational sequence about the central axis to provide narrow beam signal selectivity, directionally rotatable about the central axis. An array control system [ACS] is operated, as under microprocessor control [ , by a host system [HS] to cause RF scanning. PIN diode switching is used on printed circuit boards within the array. Amplitude and phase comparison modes are used.