| 摘要 |
PURPOSE:To enable the direct reading of a display azimuth, by a method wherein an input sine signal is divided into two and one of them is passed through a 90 deg. phase shifter while the other one is passed through a full-wave rectifier circuit and both signals are added and further subjected to half-wave rectification to be converted to a peak value. CONSTITUTION:The demodulated signal of an input signal is divided into two and supplied to a 90 deg. phase shifter 16 and a full-wave rectifier circuit 17. The 90 deg. phase shift of an input sine signal is performed in the 90 deg. phase shifter 16 to obtain a signal S13 while a full-wave rectification signal S12 is obtained in the full-wave rectifier circuit 17. The signal S13 is added to the signal S12 in an adder 19 through AGC18 and a peak wave form signal S15 acute only to the arrival direction of a radio wave is further obtained by a half-wave rectifier circuit 20. This signal S15 displays a required single peak display wave form on an indicator 22 through a multiplier 21. By this method, the direct reading of a display azimuth is enabled. |
