Calibration and A nalysis of Biconical Antennas in Open Fileds
Based on the requirement of CISPR standard for the radiation emission and receiving test(OATS),the dual antenna method is used to calibrate the double cone antenna,and it is confirmed that the coefficient curve is affected by the ground reflection in the test of antenna calibration.This can reasonably explain that in the calculated coefficient curve,there will be sharp peaks or depressions at some specific frequency points,which is mainly due to the reflection of the ground,resulting in the phase and amplitude of the signal received by the receiving antenna.Our innovative use of vector network analyzer contains the time domain gate technology,that is,through the measurement of the test antenna in the time domain,the measured signal,other clutter signal or multiple reflection signal filter,make the vector network analyzer only display direct signal(maximum amplitude component signal),correct the measurement results,provides a new correction method for antenna open field calibration,provide reference for the evaluation of the overall measurement results..
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