| 摘要 |
PURPOSE:To correct errors in amplitude and in phase of a transmitter-receiver system caused by temperature change, etc., in measuring environment during measurement, by detecting the hourly variation of signals distributed at the feeding point of an antenna to be measured. CONSTITUTION:A probe 27 is stopped at a prescribed location and outputs distributed at the feeding point of an antenna 23 to be measured are connected to a receiver 31 by means of a switching device 30, and then, recording in a CPU32 is performed by using the amplitude and phase of signals are reference signals. Then, by continuously running the probe 27 in the direction of y-axis and operating the switching device 30 at short time intervals, the quantity of variation of the outputs at the feeding point from the reference signals is calculated and sent to a control device 24 and the quantity of variation is corrected by a variable phase shifter 22 and variable attenuator 21. On the other hand, when the location of the probe 27 detected by a probe location detecting device 29 coincides with a measuring point, the output signal of the probe 27 is connected with the receiver 31 and data are accumulated in a data accumulating device 35. The remote radiating directivity of the antenna to be measured is found by using the data.
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