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:
Jun. 24, 2003
Filed:
Jan. 18, 2002
Applicant:
Inventor:
James R. Underbrink, Seattle, WA (US);
Assignee:
The Boeing Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 2/100 ;
U.S. Cl.
CPC ...
H01Q 2/100 ;
Abstract
A multi-arm elliptic logarithmic spiral array that is particularly effective in off-axis beamforming applications. The array is formed by providing an elliptic logarithmic spiral and a plurality of concentric ellipses which intersect with angularly spaced apart sample points on the elliptic logarithmic spiral. An odd number of sample points are included on each ellipse. The array of the present invention is particularly effective in off-axis beamforming applications, such as aeroacoustic test applications within wind tunnels, where the location of the array is fixed and the source of noise is positioned off axis of the array.