A reference antenna method for non-resonant electrically short monopole antennas

In order to measure the electric field strength in low-frequency bands, monopole antennas are generally used. When carrying out EMI measurements, the antenna factor is an important and well-known characteristic. Generally, absolute calibration methods are commonly used for monopole antenna calibrations. However, establishing and keeping the traceability to standard quantities in absolute calibration methods are time consuming. In this paper, a new reference antenna method for non-resonant electrically short monopole antennas is proposed and investigated through a numerical simulation. Since the target frequency band is less than 30 MHz, the monopole antennas work as electrically short monopole antennas. The measurements are performed under the near-field condition. The results show that the proposed reference antenna method is available and effective in obtaining the antenna factor of a non-resonant electrically short monopole antenna.