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:
Oct. 15, 2002
Filed:
Mar. 28, 2001
Guangping Zhou, Lake Zurich, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An internal multi-band antenna ( ) for a mobile communication devices having a planar radiating element ( ) and a ground plane conductor ( ) disposed substantially parallel thereto with a dielectric ( ) such as air or a substrate therebetween. The radiating element ( ) includes at a feed point, for example, a feeding strap ( ), which may have an L-shape. One or more shorting straps ( ) are selectively connected between the radiating element ( ) and the ground conductor ( ), positioned relative to the feed point for tuning the input impedance at the feed point, and for tuning the resonant frequency of the planar radiating element ( ). The radiating element includes an angled slot ( ) having at least three slot sections, for example, N, M, W shapes and the like, mutually coupled at a second resonant frequency to increase resonant frequency bandwidth. The feeding strap ( ) and one or more shorting straps may be provided as inverted L straps ( ) for a series LC impedance.