Generation of Predominantly Electric or Magnetic Field in Free Space

Abstract

The paper presents evaluation of electromagnetic field distribution and wave impedance variation of electromagnetic field between two antennas excited from coherent sources, taking space attenuation, impedance mismatch and multiple reflections between two sources into account. The variations of electric and magnetic field distribution and wave impedance as a function of position between two antennas are evaluated. The region between the two antennas, which is most suitable for EMI measurements under high electric and low magnetic fields or low electric and high magnetic fields is found. Numerical results are presented.

Indexing terms:

• EMI measurements
• Generation of E or H field