| 摘要 |
PURPOSE:To eliminate an interference between radars whose frequencies are same and whose antennas are asynchronous, by delay-synchronizing a transmitting trigger of each radar. CONSTITUTION:Radars 1, 2 whose frequencies are same and whose antennas are asynchronous turning are installed, being separated by a distance d0. This radar 1 is controlled by a transmitting trigger signal from a trigger signal generating circuit 3, and the radar 2 is controlled by a delay-synchronized transmitting trigger signal whose overall delay time is TD through the circuit 3, a delaying circuit 4 and a transmitting circuit, etc. When this time TD is selected, each other radar signal is not received directly or through a target in set maximum observing dstances dm1, dm2 based on the expressions I , II of the radars 1, 2, and the expression III. As a result, an interference between the radars whose frequencies are same and whose antennas are asynchronous can be eliminated. In the expression, V, T and t1, t2 denote a radio wave speed, a transmitting period, and the shortest time for making the other radar oppose to the antenna, respectively. |
