Feeder cable phase trimming system for radio communication antenna, has trimming device at feeder cable ends correcting phase differences obtained as received tone at output device present at other cable end

摘要

The system has a trimming device (AGE) connected to one end of the feeder cables (L1-L4). A transmission pilot tone is fed to the cables from an input device (EKE) via the trimming device. The transmitted tone is obtained as a received pilot tone in an output device (AKE) present at other end of the cable. The phase difference is detected using the received tone and is fed back to the trimming device for correction.