| 摘要 |
PURPOSE:To improve the S/N to each slave station, by providing plural antennas at a master station which have narrow individual beam angles to be directed to plural slave stations and then selecting one of these antennas synchronously with the allotment of burst. CONSTITUTION:A burst type signal train is formed at a time division multiple access logical processing part 7. The carrier wave is modulated by the above- mentioned signal train and through a transmitting part of a transmitting/receiving part 8. This modulated carrier wave is led to a diode switch circuit 10 via a transmission/reception sharing device 9. The circuit 10 selects an antenna 12 for a slave station through a diode switch control part 11 and synchronously with allotment of burst to each of slave stations 31-3n. The carrier wave is transmitted to the stations 31-3n through the selected antenna 12. |
