SIMULTANEOUS MEASUREMENTS OF RF ELECTRIC AND MAGNETIC NEAR FIELDS - THEORETICAL CONSIDERATIONS

Theoretical considerations for the design of an isotropic combined ele ctric and magnetic radio-frequency field probe are presented. The prob e is intended for simultaneous measurements of hazardous electric and magnetic fields under near-field conditions in the frequency range fro m 10 MHz to 300 MHz. The probe consists of six dipoles and six loops p laced on all six sides of a small cube, thus providing a well defined electrical center due to the symmetry. Other significant advantages ar e improvement of the isotropicity, reduction of the detection errors a ssociated with asymmetrical waveforms, and reduction of the electric f ield coupling to the magnetic field sensors. Theoretical findings are in agreement with the measured results of a constructed experimental p robe.