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:
Sep. 01, 2009
Filed:
Nov. 05, 2007
Alfred R. Lopez, Commack, NY (US);
Alfred R. Lopez, Commack, NY (US);
BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US);
Abstract
Vertical array antenna systems can provide broadband data link operation with reduction of susceptibility to low angle multipath effects, for communication during carrier landings by aircraft and other applications. In a relatively small package, an antenna system may include a stack of sub-arrays, each including four dipoles provided as configurations of downward and upward extending dipole arm members which are vertically separated by an annular slot excited by vertical probes. Excitation of the dipoles may be provided via excitation of the annular slot by the probes. Intercoupling-reduction disk units may be positioned between vertically adjacent sub-arrays. Pattern cutoff characteristics suitable for aircraft carrier landing operations (e.g., for reliable DGPS communications) at or near the horizon may be provided by excitation of individual sub-arrays at predetermined relative levels and with pattern phase reversal between lower and upper sub-arrays. Such phase reversal may be provided by physical inversion of some sub-arrays of an antenna system. Other embodiments are described.