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:
Jun. 22, 2004
Filed:
Oct. 08, 2002
Friedrich Schumacher, Munich, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A system for phase trimming of feeder cables, which are used for driving an antenna system uses a transmission pilot tone. A pilot tone device, which is arranged on the transmission side, produces the transmission pilot tone, which is input into each individual one of the feeder cables and is in each case passed, as a received pilot tone, to an output device which is connected upstream of the antenna system. Using the latter, the pilot tone is output from the respective feeder cable, and is processed further in order to determine phase differences between the feeder cables. The phase differences between the feeder cables determined in this way are compensated for by a trimming device, which is arranged between the input device and the feeder cables.