WIRELESS SYSTEM, ELEVATOR CONTROL SYSTEM USING SAME, AND POWER TRANSFORMATION EQUIPMENT MONITORING SYSTEM

摘要

A plurality of wireless devices 101 each provided with: two antennas 21, 22 that are spatially orthogonal to each other or do not have a parallel relationship; circulators 23, 24 for switching these antennas between transmission use and reception use; a transmitter 101T; and a receiver 101 R, and having a function of transmitting and receiving a rotatory polarized wave are disposed, and the transmitter 101T provided in the wireless device 101 transmits an information signal ω_I or a dummy signal ω_D while performing switching therebetween at a timing when the rotatory polarized wave received by the receiver 101R matches a predetermined polarized wave.