Title :
Mode-stirred chamber for measuring shielding effectiveness of cables and connectors: an assessment of MIL-STD-1344A method 3008
Author :
Crawford, M.L. ; Ladbury, J.M.
Author_Institution :
NBS, Boulder, CO, USA
Abstract :
The mode-stirred method for measuring the shielding effectiveness (SE) of cables and connectors as specified in MIL-STD-1344A method 3008 is examined. Problems encountered in applying the method are identified, and recommendations to obtain improved results are provided. These include chamber design, type and placement of transmitting and reference-receiving antenna, determination and correction of the voltage standing-wave ratio (VSWR) of the reference antenna and equipment-under-test (EUT), and the measurement approach to use at specified test frequencies. Design and measurement setups for a small mode-stirred chamber suitable for performing SE measurements in the 1-18-GHz frequency range with dynamic ranges up to 130 dB are given along with SE measurement results of some sample EUTs.<>
Keywords :
antennas; cables (electric); electromagnetic interference; electronic equipment testing; magnetic shielding; test facilities; 1 to 18 GHz; MIL-STD-1344A method 3008; SHF; UHF; cables; chamber design; chamber type; connectors; equipment-under-test; measurement; mode-stirred chamber; reference-receiving antenna; shielding effectiveness; transmitting antenna; voltage standing-wave ratio; Antenna measurements; Cables; Connectors; Dynamic range; Frequency measurement; NIST; Receiving antennas; Testing; Transmitting antennas; Wavelength measurement;
Conference_Titel :
Electromagnetic Compatibility, 1988. Symposium Record., IEEE 1988 International Symposium on
Conference_Location :
Seattle, WA, USA
DOI :
10.1109/ISEMC.1988.14082
