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:
May. 02, 2000
Filed:
Nov. 10, 1997
Applicant:
Inventors:
Magnus Marthinsson, .ANG.kersberga, SE;
Gunnar Filipsson, Linkoping, SE;
Assignee:
Allgon AB, .ANG.kersberga, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q / ; H01Q / ;
U.S. Cl.
CPC ...
343895 ; 343702 ;
Abstract
A multi-band antenna for mounting on the housing of a hand-portable telephone, the antenna comprising a feed portion and an antenna whip, arranged to slide into and out of the telephone to retracted and extended positions and combined with a multi-band helical structure. There are alternative ways disclosed of arranging the helical structure and other possible radiating elements of the antenna means to attain operability within separated frequency bands, for example, at 900 and 1800 MHz. In some configuration, the antenna means requires an impedance matching circuit in order to be operable at different frequency bands.