Measurement of Antenna Factor of Dipole Antennas on a Ground Plane by 3-Antenna Method

摘要

A measurement method of the antenna factor of the dipole antenna for EMI measurements can be studied theoretically and experimentally. A 3-antenna method based on near-field measurements is adopted. Near-field transmission characteristics between the transmitting and the receiving dipole antennas, is analyzed by using the EMF method, where sinusoidal current distributions are assumed. It is shown that antenna factors of the antennas can be obtained from measured values of transmission constants between two antennas in the near-field area at arbitrary heights of each antenna.