| 摘要 |
PURPOSE:To secure a good analyzing function of bearings and thus eliminate the occurrence of the fault bearings, by adding an auxiliary antenna to an array antenna and giving a microwavelike processing to the output signals of both antennas. CONSTITUTION:The auxiliary antenna 13 is provided near the center of the array antenna 100, and the output of the antenna 13 is connected to the 180 deg.-hybrid 15 via the cable 19 and phase adjuster 18. At the same time, a directional coupler 14 is provided between the output terminal 5 and the distributor 4 of the antenna 100. One of the distributor 4 and terminal 5 is connected to the hybrid 15 by the cable 19. The input signals of terminals 15a and 15b of the hybrid 15 are delivered to the sum terminal 16 when they are in the same phase and same amplitude and then to the differential terminal 17 when they are in the different phases and different amplitudes respectively. A comparison of amplitude is given to the outputs of wave detectors 25a and 25b by the converter 24 to secure an effect of discrimination between the causes of the grating globe or the genuine beam. Thus an occurrence of the fault bearings can be prevented. |
