| 摘要 |
<p>PURPOSE:To obtain a stable measurment value even when an active element fluctuates by a constitution wherein a receiving input from an antenna and a part of output of a transmitter are changed-over through a time division system and along with this, the output of a receiver is separated with respect to time through a separation circuit. CONSTITUTION:In a radar system which measures a radar scatter coefficient of a clutter (irregular reflection waves from the sea surface or the ground surface) or quantity of rain-fall, a part of output signals of a transmitter 1 is branched through a directional coupler 11 and delivered to a switching device 12. The switching device 12 processes a part of the transmitting output signals delivered from the directional coupler 11 and receiving input signals delivered from a transmitting and receiving device 3 through a time division system to mix it and delivers it to a receiver 4. A separating circuit 13 performs an inverse operation and separates transmitting output signals and receiving input signals in a receiver output 15 and delivers the transmitting output signals to a memory circuit 14 and delivers the receiving input signals to a division circuit 15. The receiving input signals of the output from the separation circuit 13 is divided by the output value of the memory circuit 14, thereby obtaining a stable measurement value.</p> |
