Radio direction finding device

摘要

PROBLEM TO BE SOLVED: To provide a radio wave direction finding apparatus capable of performing calibration in consideration of individual differences of electric parts and deterioration over time while reducing the circuit scale. SOLUTION: A receiving device 10 of a radio wave direction detecting device 20 receives a signal received by each of a plurality of azimuth measuring antennas, and a calibration signal for a azimuth measuring antenna when performing calibration. The phase difference between the azimuth measuring antenna when the incoming radio wave is received between the transmitter and the azimuth measuring antenna, and the calibration signal from any one azimuth measuring antenna. When transmitted, a phase difference detection unit that detects the phase difference between multiple other azimuth measuring antennas, a storage unit that stores the correction value calculated from the phase difference that was acquired during calibration, and a phase detection unit The arrival direction calculation unit that calculates the arrival direction of the arrival radio wave by using the phase difference between the plurality of azimuth measuring antennas at the time of receiving the arrival radio wave and the correction value. [Selection diagram] Figure 1