KEYCOM provides solutions in the 300 GHz to 1 μHz frequency range (SHF/EHF/MW/UHF/VHF/ULF).
We undertake designing, manufacturing and measuring. Please feel free to contact us.

Shield Effect Measurement Systems

Model No. sem
KEYCOM develops and manufactures highly accurate and practical
shield effect measurement systems for a large variety of applications by leveraging its
rich experience and expertise accumulated over a long period of time.


Shield Effect Measurement System, Coaxial Tube Type (10.0kHz~18.0GHz):System No. SEM01
SEM01 complies with ASTM D4935, and is capable of measuring shield effect with plane wave with high accuracy.
·Dynamic range over 100dB.
·153D、39D、20D and GPC7 coaxial type.
·Data can be saved in Excel format, and reproduced graphically.
Shield Effect Measurement System,Waveguide Type(1.0GHz~90.0GHz):System No. SEM02
SEM02 measures shield effect at wide ranges of 100dB between 1GHz~40GHz, and 70dB between 40GHz~90GHz.
The incidence angle of the plane wave to the sample changes as frequency changes,
allowing you to measure the correlation between the incidence angle and the shield effect.
Shield Effect Measurement System for Cable: System No. SEM03
SEM03 is a MIL-C-85485A compliant standard measurement method,
effective for coaxial cable and the multi-core cable evaluation.
It compensates the result with the value of the characteristic impedance.
Shield Effect Measurement System for Cables, Crosstalk Type: System No. SEM04
sem 04002021210-03
Complying with the crosstalk method, SEM04 is capable of measuring the shield effect effectively.
·It supports wide variety of cables from coaxial cables to multi-core cables.
·It prevents mismatching caused by the characteristic impedance difference with a 10dB pad.