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Near‐zone field‐strength meter for measurement of RF electric fields
Author(s) -
Eggert S.,
Goltz S.,
Kupfer J.
Publication year - 1979
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs014i06sp00009
Subject(s) - field strength , metre , electric field , electrical engineering , optics , measuring instrument , electricity meter , acoustics , range (aeronautics) , materials science , physics , magnetic field , engineering , power (physics) , quantum mechanics , astronomy , composite material , thermodynamics
The NFM‐1 near‐field‐strength meter developed in the German Democratic Republic utilizes two dipole probes designed for 60 kHz to 350 MHz. The measuring ranges of the probes overlap each other from 10 MHz to 30 MHz. The meter operates over the temperature range −10°C to +40°C. Field strength meters of 2 V m −1 to 2500 V m −1 sensitivity with a measuring error of ⩽ 20% must be calibrated by special equipment designed for the purpose. A calibrating stand based on the principle of a parallelplate capacitor is used in the frequency range from 60 kHz to 18 MHz, and a triplate‐stripline (TEM‐cell) is used in the frequency range from 10 MHz to 350 MHz, for calibrating the probes. Large‐scale measurements were made in 1976 by which the NFM‐1 meter was compared with the corresponding near‐field‐strength meters used in the USSR, Czechoslovakia, and Poland.