| 摘要 |
PROBLEM TO BE SOLVED: To surely detect abnormality of an antenna panel for each branch cable in an antenna system. SOLUTION: Related to the antenna system, a transmission signal of a main feeder 1 is branched into a plurality of branch cables 4, 4,... through a junction box 2, and then transferred to antenna panels 7, 7,... connected to the branch cables 4, 4,.... Here, standing-wave measuring parts 3, 3, for measuring voltage/ standing-wave ratio at a branch cable and signal lines 5, 5,... through which the measured value of voltage/standing-wave ratio is transferred to a display part 6, are provided to each of branch cables 4, 4,.... |
