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:
Apr. 23, 2013
Filed:
Aug. 27, 2009
Heinz-dieter Hettstedt, Isernhagen, DE;
Robert Zorad, Burgdorf, DE;
Axel Schroeder, Nordsehl, DE;
Gerd Klauke, Hannover, DE;
Ekkehard Schomburg, Burgwedel, DE;
Heinz-Dieter Hettstedt, Isernhagen, DE;
Robert Zorad, Burgdorf, DE;
Axel Schroeder, Nordsehl, DE;
Gerd Klauke, Hannover, DE;
Ekkehard Schomburg, Burgwedel, DE;
Alcatel Lucent, Paris, FR;
Abstract
The present invention relates to radio frequency (RF) distribution systems for mobile communications. In particular, the present invention relates to a radio frequency network facilitating radio communication where the usual free space propagation of electromagnetic waves is hampered, undesired or impossible, for example in tunnels, mines, and buildings and in large complexes like exhibition grounds, shopping malls, and airports. The radio frequency network comprises a distributed antenna system having radiating elements, a wired distribution system feeding the distributed antenna system, at least one antenna amplifier between one end of the wired distribution system and the distributed antenna system, at least one line amplifier at the other end of the wired distribution system, and automatic self-leveling units included in the antenna and line amplifiers.