| 摘要 |
<p>PURPOSE:To shorten the time when reception is impossible by providing a beam control circuit which controls the radiation direction of each subpulse in accordance with speed information of a designated specific target. CONSTITUTION:A transmission pulse signal whose pulse repeat period is shorter than the range delay time of targets is generated by a transmitter 1 and is inputted to a transmission pulse modulating circuit 2. The circuit 2 divides this signal to four subpulses corresponding to the number of targets, and they are distributed and supplied to respective phase devices 5 and pass transmission/ reception switches 7 and are radiated from element antennas 4 constituting an array antenna 3. Phase quantities phi1 to phim required to successively form four transmission beams in radiation directions of respective subpulses are calculated and set to (m) phase devices 5 by a phase quantity calculating circuit 12, and the order of formation of transmission beams to respective targets is determined by a beam control circuit 13.</p> |
