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:
Aug. 10, 2004
Filed:
Jun. 14, 2002
William E. McKinzie, III, Fulton, MD (US);
Shawn D. Rogers, Laurel, MD (US);
Etenna Corporation, Laurel, MD (US);
Abstract
A multi-band artificial magnetic conductor (AMC) is described in an electrically small antenna for use in handheld wireless devices and base station antenna applications. The multi-band AMC contains a ground plane, two or more frequency selected surfaces (FSS) having periodic conductive patches disposed on opposing surfaces and a dielectric layer sandwiched between the surfaces, and dielectric layers between the FSS layers and between the lower FSS layer and the ground plane. Various parameters of the dual band AMC are chosen such that the AMC has non-harmonically related resonant frequencies within two or more different frequency bands.