Far Field Gain Estimation Method for Japanese Broadband Antenna Standard Using Time-Frequency Analysis
S. Kurokawa, M. Ameya, and M. Hirose
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
We propose a new estimation method for far-field antenna factor and gain of broadband antenna at near distance. Our proposed method is based on the techniques of a time domain analysis and a time-frequency analysis using a short time Fourier transform. Our proposed method can be determined the estimated antenna distance at each frequency to estimate the far-field gain. In the case of Bi-conical antenna, the difference between far-field gain and the estimated gain using our proposed method is less than 0.2 dB at 5 m antenna distance in the frequency range from 30 MHz to 240 MHz. In the case of Log-periodic dipole array antenna for EMI measurement, the difference between far-field gain and the estimated gain using our proposed method is less than 0.25 dB at 5 m antenna distance in the frequency range from 300 MHz to 1200 MHz.
PIERS, Stockholm, Sweden
2013
August
824 - 828
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