| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio base station device, whereby radio wave section communication is executed by detecting the electric field level of an adjacent radio base station and controlling the transmission power of a wide dynamic range based on the electric field information. SOLUTION: At the time of calling, downstream electric wave transmitted from a call transmitter/receiver 5 is distributed in two directions by a hybrid 3. First downstream electric wave passes through a circulator 2, to be radiated form a transmission/ reception antenna 1 into a self-zone and second downstream electric wave is inputted to the input terminal B of an antenna/ALC(automatic level control) change-over switch 4. When the antenna/ALC change-over switch 4 selects the input terminal B and an antenna change-over switch 7 selects the input terminal C, a second downstream electric wave is inputted to an electric field monitoring receiver 8. When the electric field monitoring receiver 8 detects the power and transmits the transmission power information to a control part 9, the control part 9 compares the transmission power inputted with the previously set power information and transmits a power control signal for executing control, so as to allow sending to the call transmitter/receiver 5 which will control the inputted transmission power information to be equal to a set value. |
