| 摘要 |
PURPOSE:To enable the direction measurement with high speed and accuracy through correcting the phase difference, by digital processing incoming signal and storing it through obtaining the instantaneous aximuth and arrival bearing. CONSTITUTION:Based on the phase difference between signals obtained through the scanning of a plurality of antenna elements, the direction of incoming of received electromagnetic waves is detected. In this case, in the directional detector 7, IF signal is converted 11 into pulse, the reference phase signal and the phase are compared with the phase detector 12, the control signal of the antenna element is referenced with the phase average device 14 from the result of comparison to calculate the average phase, the phase difference of the antenna elements is detected at the phase difference detector 15 and it is stored in the memory 19. Further, the phase difference data is suitably read out from the memory 19, the instantaneous direction at switching of antenna is obtained by the directional operator 17 with the correlativity calculation 16, and average processing over the measuring time given to the instantaneous direction with the direction processor 18 is made to obtain the arrival bearing. |
