A three-loop antenna system for performing near-field measurements of electric and magnetic fields from video display terminals

Author

Tofani, Santi ; Ossola, Piero ; d´Amore, G. ; Anglesio, Laura ; Kanda, Motohisa ; Novotny, David R.

Author_Institution

Servizio di Fisica Sanitaria, Ivrea, Italy

Volume

38

Issue

3

fYear

1996

fDate

8/1/1996 12:00:00 AM

Firstpage

341

Lastpage

347

Abstract

This paper discusses the use of a three-loop antenna system (TLAS) for near-field measurement of electric and magnetic fields from video display terminals (VDTs). We calculated the electric and magnetic dipole moments to derive the electric and magnetic field patterns in the near field region. Electric and magnetic fields, emitted by several different models of VDTs, were evaluated with the TLAS and were compared with those measured by conventional electric and magnetic field probes at different distances and directions from VDTs. A good correlation (±1.6 dB) between the two measurement techniques was found. This agreement is within the accuracy (±2 dB) of the conventional field probe measurements

Keywords

computer displays; electric field measurement; electromagnetic interference; magnetic field measurement; video equipment; EM radiation; EMI; VDT; correlation; directions; distances; electric dipole moments; electric field measurement; electric field patterns; electric field probes; magnetic dipole moments; magnetic field measurement; magnetic field patterns; magnetic field probes; measurement accuracy; near field region; near-field measurements; three-loop antenna system; video display terminals; Antenna measurements; Displays; Electric variables measurement; Electromagnetic measurements; Electromagnetic radiation; Magnetic field measurement; Magnetic moments; NIST; Performance evaluation; Probes;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.536064

Filename

536064