| 摘要 |
PURPOSE:To obtain a transmission beam of an even level over the overall bearings of a transmitter by transmitting a transmission signal continuously while controlling the phase of the signal to be applied to a plurality of transmitter elements in an RDT transmission. CONSTITUTION:A phase modulation circuit 7 modulates a transmission frequency signal 201 outputted from a transmission signal generation circuit 2 with characteristic of continuous phase changes, namely, phase modulation signals 801... of a phase control circuit 8 and sends it to a transmission power amplification circuit 5 as processed phase modulated wave signals 701... and a transmitter switch signal 9004 from a transmission time control circuit 9 activates a switch relay circuit of a transmitter switching circuit 6 to send transmission outputs 501... to transmitter element 1-1... shifting the elements by one in the direction of turning the transmission beam each time the transmission done. Thus, the transmission beam formed with the combination of phases by continous phase control performs a spiral scanning in a desired bearing range continuously at an even level. |
