| 摘要 |
PURPOSE:To eliminate the effect of the variation in the level of receiving output, by integrating the signal of a sense antenna signal synthesizing part and that of a sense antenna non-synthesizing part in inverse polarity so as to reverse polarity to each other and determining sense by the polarity of the integration output. CONSTITUTION:A directional characteristic antenna 11 is rotated and receives rotary directional characteristic output A from a rotary goniometer 16. This output A is synthesized with the receiving signal of a sense antenna 18 in the vicinity of said output A by a synthesizer circuit 17 to obtain a synthetic signal C wherein a max. sensitivity point and a min. sensitivity point appear one at a time at every one rotation of antenna direction. The synthetic part and non-synthetic part of a sense antenna signal are taken out by gates 84, 85 and the outputs of said gates are integrated in inverse polarity at every arrival of the min. sensitivity point by an integrator 86 so as to reverse polarity. The sense of a receiving radio wave arrival direction is determined by the polarity of the integration output. |
