Summary
International Symposium on Antennas and Propagation
2005
Session Number:3E2
Session:
Number:3E2-2
CALIBRATION OF VHF EMI ANTENNAS USING VERTICAL POLARIZATION
Suguru Tsushima, Katsumi Fujii, Yasushi Matsumoto, Akira Sugiura, Yukio Yamanaka,
pp.-
Publication Date:2005/11/3
Online ISSN:2188-5079
Summary:
Antennas used in radiated EMI measurements must be calibrated for determining the free-space value of the antenna factor. Hence, the present paper proposes an antenna calibration technique using the Standard Antenna Method where transmit and receive antennas are oriented for vertical polarization. The method of moments is applied to investigate errors introduced in calibration of a biconical antenna for the frequency range from 30 to 250 MHz. As a result, appropriate antenna arrangements are found for the calibration that can provide the free-space antenna factor with an error less than 0.1 dB. Furthermore, insertion loss measurement required in the antenna calibration is theoretically investigated to evaluate errors in actual calibration measurements. It is found that the insertion loss exceeds 60 dB at 30 MHz, which may introduce an additional error of about 0.2 dB in the antenna calibration.