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:
Feb. 19, 2008
Filed:
Dec. 22, 2004
Applicants:
Masatoshi Kuroda, Osaka, JP;
Katsuyuki Imai, Osaka, JP;
Inventors:
Masatoshi Kuroda, Osaka, JP;
Katsuyuki Imai, Osaka, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 15/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An antenna device using an approximate Luneberg lens, wherein high gain and low side-lobe are made compatible. A lens antenna device comprising, combine with each other, a radio wave lens () formed of a dielectric satisfying the condition, 0<a≦r, where the distance from the front surface of a lens () to the focal point of the lens is a, and the radius of the lens r, and a primary radiator () having a 10-dB beam width θ wherein A, determined by the expression, A=θ/2×(1+2a/r), is at least 40 and up to 80, more preferably at least 50 and up to 70.