| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a radar apparatus which can maintain an electric characteristic with reference to a secular change and a change in an operating environment while a rise in production costs is being suppressed. SOLUTION: In a scanning radar apparatus, the irradiation direction of a beam is changed by a mechanical scanning operation or an electric scanning operation. The scanning range of the beam is composed of a detection range required to detect an object and a calibration range required to calibrate the inside of the apparatus. A radio-wave absorber 12 which is used to detect a noise level and to change a bias voltage and a control signal so as to make the noise level minimum and a reflector 13 or a delay reflector which is used to calibrate an amplification gain, a transmission output and a transmission frequency are installed in the calibration range.</p> |
