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:
Jan. 13, 2004
Filed:
Feb. 12, 2001
Eli Yablonovitch, Malibu, CA (US);
Laurent Desclos, Los Angeles, CA (US);
Sebastian Rowson, Santa Monica, CA (US);
Ethertronics, Inc., San Diego, CA (US);
Abstract
The shielded spiral sheet antenna concept permits a small efficient antenna structure that is much smaller than the electromagnetic wavelength. In such small structures, the radiation usually goes almost all directions. A geometrical structure that shields the radiation from absorbers, and it directs the radiation in the opposite direction. This is difficult to achieve in very small radiators. At the same time, the shielded spiral sheet structure is more efficient than other antennas. Its radiation is shielded from an adjacent absorber by an asymmetric metallic border. The specifications of the asymmetric metallic border are given by an operational mathematical procedure.