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Transfer Impedance Testing of EMI Gaskets

  • George M. Kunkel
Chapter

Abstract

The transfer impedance testing of Electromagnetic Interference (EMI) gaskets as described in SAE ARP-1705 revision C is documented. The specification includes two test fixtures. These fixtures are 1705A and 1705C. The 1705A test fixture tests over the frequency range of 10 kHz through 1 GHz with an accuracy of ± 2 dB. The 1705C test fixture tests with an accuracy of ± 2 dB over the frequency range of 10 kHz through 18 GHz. The 1705A fixture tests for (1) the conductivity of the gasket against any of the structural materials and finishes used by industry; (2) the conductivity of a test sample as a function of the force of the gasket against the joint surfaces; and (3) the effects moisture and salt fog have on the ability of the gasket to provide the required shielding. The 1705C fixture tests for the conductivity of the gasket against any of the structural materials and finishes used by industry and the effects the force of the gasket against the joint surfaces has on the conductivity.

Keywords

EMI gaskets Transfer impedance testing SAE ARP-1705 Shielding theory Shielding practice Shielding requirements Shielding quality Moisture testing Salt fog testing Moisture environments Salt fog environments E field testing H field testing 

References

  1. 1.
    SAE ARP-1705 Rev. C (2017) Coaxial test procedure to measure the RF shielding characteristics of EMI gasket materials, SAE InternationalGoogle Scholar
  2. 2.
    Freyer GJ (1992) Comparison of gasket transfer impedance and shielding effectiveness measurements, part I, IEEE, EMC International Symposium, Anaheim, CAGoogle Scholar
  3. 3.
    Hatfield MO (1992) Comparison of gasket transfer impedance and shielding effectiveness measurements, part II, IEEE, EMC International Symposium, Anaheim, CAGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • George M. Kunkel
    • 1
  1. 1.Spira Manufacturing CorporationSan FernandoUSA

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