| 摘要 |
PURPOSE:To display the arrival direction and elevation of a radio wave and the distance to a radio wave emitting point, by measuring the arrival direction and amplitude value of the phase change component of a receiving signal obtained by arranging a non-directional antenna and comparing both of them with reference values. CONSTITUTION:A frequency correction circuit 6 converts an azimuth signal, of which the amlitude changes in proportion to frequency, to an azimuth signal with constant amplitude regardless of frequency and an internal signal circuit 8 generates a rectangular wave group comprising the relation of frequency same to and integer times to that of the azimuth signal. A reference signal generation circuit 2 generates a SIN wave synchronous to the internal output signal and multiplies the same by both rectified waves of the azimuth signal to integrte the area of the product output signal thereof on the basis of a polarity signal. The phase of the internal output signal is controlled by this integrated result and follows that of the azimuth signal while the sum total of preset values F4 come to a radio wave arrival direction. When the azimuth of a radio wave is determined, the amplitude of an azimuth is calculated and compared with the content 11 of memory 10 while an azimuth, elevation and a distance of values coincided with or nearest to said amplitude value are displayed by an azimuth display device 12. |
