Patent ID: 6753811
Filing Date: 2004-06-22
Classification: H01Q

Abstract:
A system for phase trimming of N feeder cables, which are used for driving an antenna arrangement, by a transmission pilot tone, comprising:a trimming device connected to a first end of the feeder cables, to correct phase differences between the N feeder cables; an input device connected to the trimming device to successively input a transmission pilot tone to the first end of the N feeder cables via the trimming device; a transmission device to which the N feeder cables are connected via the trimming device and the input device; an output device connected to a second end of the N feeder cables, between the N feeder cables and the antenna system, to output the transmission pilot tone as a received pilot tone; and a detection unit to detect phase differences between the N feeder cables using the received pilot tone so that phase differences can be corrected by the trimming device.