Title :
Shielding effectiveness measurement of a 19"-case through direct current injection (DCI)
Author :
Bernauer, J. ; Weis, R. ; Schwab, A.J.
Author_Institution :
Inst. of Electr. Energy Syst. & High-Voltage Technol., Karlsruhe Univ., Germany
Abstract :
This paper presents a new test procedure for measuring the shielding effectiveness (SE) of small and medium-size enclosures against high-frequency fields and currents in the frequency range up to 1 GHz. For the measurements, the method of coupled transmission lines is used. The external circuit is a 50 Ohm transmission line consisting of a single cylindrical conductor fixed on the shield, while the internal transmission line is formed by a sense wire in the center of the enclosure and the inner shield wall. The voltage transfer function between the external and the internal transmission line provides an expression for the SE
Keywords :
UHF measurement; electric field measurement; electromagnetic shielding; high-frequency transmission lines; magnetic field measurement; time-domain reflectometry; transfer functions; 10 MHz to 1 GHz; 19 in; 50 ohm; coupled transmission lines; direct current injection; external circuit; high-frequency currents; high-frequency fields; inner shield wall; internal transmission line; medium-size enclosures; sense wire; shielding effectiveness measurement; single cylindrical conductor; small-size enclosures; voltage transfer function; Circuit testing; Conductors; Coupling circuits; Current measurement; Distributed parameter circuits; Frequency measurement; Transfer functions; Transmission line measurements; Voltage; Wire;
Conference_Titel :
Electromagnetic Compatibility, 1997. IEEE 1997 International Symposium on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-4140-6
DOI :
10.1109/ISEMC.1997.667744
