| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform wide range searching in a short time while grasping a plurality of targets within beam width separately by providing a local oscillating section, a frequency detecting section, and the like, so that the angle of a plurality of incoming radio waves can be detected simultaneously at the time of wide range searching exceeding the beam width and searching within beam width. SOLUTION: A guide unit 1 is provided with an antenna section 3 for receiving radio wave radiated from a target 2 and delivering a receiving signal to a receiving section 4 where the receiving signal is subjected to frequency conversion with a reference signal from a local oscillating section 5, amplification and phase detection to produce a video signal. The video signal is converted at an A/D converting section 6 into a digital video signal and delivered to a frequency detecting section 7. Based on a frequency information signal received from the frequency detecting section 7, a DBF processing section 10 calculates the angle of incoming radio wave from a plurality of targets simultaneously through Fourier transform. Subsequently, an angle detecting section 8 detects the angle of incoming radio wave from each target and a guide signal is outputted from a guide signal calculating section 9 based on the detected angle.</p> |
