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:
Sep. 23, 2003
Filed:
Jan. 17, 2002
Dirk Wendt, Dettingen, DE;
Martin Kuhn, Stugart, DE;
Markus Pfletschinger, Eningen, DE;
Peter Riedhofer, Metzingen, DE;
Hirschmann Electronics GmbH & Co. KG, Neckartenzlingen, DE;
Abstract
In an antenna having at least one vertical radiator, preferably a vehicle mobile radiotelephone antenna, the at least one vertical radiator is connected to the ground on one end and to a vertical conductor fed against the ground on the other end by means of an impedance transforming device having an electrical length which is approximately one fourth the mean operating wavelength or an uneven multiple thereof. Said structure makes it possible for the at least one vertical radiator to have a uniform current occupancy over its entire length. By cooperating with the vertical conductor fed in a co-radiating manner, said occupancy exhibits high radiation power comparable to that of a &lgr;/4 monopole antenna despite the fact that the at least one vertical radiator has a smaller length which is approximately {fraction (1/10)} of the mean operating wavelength. The invention also describes advantageous embodiments or configurations of said antenna and practical arrangements of said antenna in vehicles.