| 摘要 |
PURPOSE:To communicate with plural stations without increasing the transmission power, by providing a phased array antenna for a master station and concentrating the beam to slave stations in synchronizing with the assignment of the burst to each station. CONSTITUTION:A burst signal train is formed at a time division multiplexer connection TDMA logical processing section 5 of a master station 1, and the modulation wave by this signal train is led to a phased array antenna 8 via a common device 7 for transmission and reception. A beam angle of the antenna 8 is controlled for the desired slave station at a phased array controlling section 9. In the antenna 8, the phase between the device 7 and each radiator 11 is changed at each radiator 11, and when transmission is performed to the slave station, the same phase vector is obtained at the reception of the slave station at an angle. In case of the reception of the master station, the synthesized reception vector of each radiator 11 of the antenna 8 receiving electromagnetic waves from the slave station is a maximum level, because the vector of the signal from the slave station during communication assigned with the burst at a present is arranged, and the signals of the other stations are suppressed. |
