| 摘要 |
PURPOSE:To make it possible to detect the existing direction of a target on the basis of two transmission points being reference points, by receiving reflected waves of transmission waves from two transmission points to calculate intermediate frequency difference converted from center frequency. CONSTITUTION:Transmission waves different in center frequency are emitted from two transmission points respectively having a distance (a) from a receiving point 7 and the reflected waves from a target 20 are supplied to receivers 10, 15 through an antenna 19 and a branch circuit 9. The center frequency of each receiving signal is converted to intermediate frequency through local oscillation output and the intermediate frequency difference of a function in a target direction through a mixer 13 and the existing direction of a target on the basis of the transmission points is detected. |
