| 摘要 |
<p>PURPOSE:To make it difficult for an opponent side to find a radio wave and to reduce the influence of disturbance by sending a wave by spread spectrum and reducing the sent electric power density per unit frequency band. CONSTITUTION:The output of an oscillator 1 is sent from 1st and 2nd antennas 4a and 4b by spread spectrum modulation by using the output of a spread spectrum code generator 21a. A reflected signal from a target is received by 3rd and 4th antennas 4c and 4d and then inputted to 1st-5th correlators 16a-16e after homodyne detection is performed by a mixer 5. Ignition circuits 10a-10d are controlled with the outputs of those correlators 16a-16d and the oscillation frequency of a voltage-controlled oscillator 20 which drives the generator 21a is controlled.</p> |
