| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulse radar device capable of detecting a target based on received reflection waves even if narrow-band unwanted waves are input.SOLUTION: A receiver 5 includes: a low-noise amplifier 51; a frequency converter 52; a plurality of band pass filters 54, 55; a vacuum vessel 59; and a cooling device 510. The low-noise amplifier 51 amplifies a reception signal received by an antenna by low noise. The frequency converter 52 converts the frequency of the reception signal amplified by the low-noise amplifier 51 by low noise based on an oscillation frequency generated by an oscillator 4. The plurality of band pass filters 54, 55 are composed of a superconductive material, and extract frequency band components corresponding to filter characteristics of the band pass filters 54, 55 from the reception signal amplified by the low-noise amplifier 51 by low noise. The vacuum vessel 59 and the cooling device 510 cool the plurality of band pass filters 54, 55 at an extremely low temperature to turn into a superconductive state. Further, the receiver 5 suppresses unwanted components by at least one of the band pass filters 54, 55. |
