Title :
A method for generating a standard magnetic field in a circular waveguide
Author :
Nakane, Hiroshi ; Omori, Shunichi ; Yokoshima, Ichiro
Author_Institution :
Dept. of Electr. Eng., Sci. Univ. of Tokyo, Japan
fDate :
6/1/1989 12:00:00 AM
Abstract :
In order to minimize the effect of electromagnetic interference and the surrounding conductive materials in the calibration of small loop antennas used above HF frequencies, a novel method for generating a standard magnetic field in a circular waveguide is proposed. A method for obtaining the average magnetic-field strength incident on a receiving loop by placing the radiating and receiving circular loop antennas within a circular waveguide operated below the cutoff frequency region is described. The differences between the theoretical and experimental values of the field strength are within 0.1 dB between 10 and 150 MHz for the radiating and receiving loops with radii of 1.0 cm and within 0.15 dB between 10 and 110 MHz for radiating and receiving loops with a radii of 1.5 cm
Keywords :
antennas; calibration; circular waveguides; electromagnetic interference; interference suppression; magnetic field measurement; magnetic fields; measurement standards; 1.0 cm; 1.5 cm; 10 to 150 MHz; above HF frequencies; calibration; circular waveguide; cutoff frequency; effect of electromagnetic interference; field intensity meter calibration; field strength; radiating loop; receiving circular loop antennas; small loop antennas; standard magnetic field; Electromagnetic waveguides; Frequency; Hafnium; Interference; Magnetic fields; Magnetic materials; Magnetic shielding; Receiving antennas; Testing; Waveguide theory;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
