ASTM D4935-99 - SHIELDING EFFECTIVENESS OF PLANAR MATERIALS (30 MHZ - 1.5 GHZ)
The test method of the standard ASTM D4935-99 provides a procedure for measuring the electromagnetic (EM) shielding effectiveness (SE) of a planar material due to a plane-wave, far-field EM wave.
The measurement method is valid over a frequency range of 30 MHz to 1.5 GHz.
These limits are not exact, but are based on decreasing displacement current due to derceased capacitive coupling at lower frequencies and on overmoding (excitation of modes other than the transverse electromagnetic mode (TEM) at higher frequencies for the size of specimen holder described in this test method.
NOTE: This test method is not applicable to cables or connectors.
Emctest Technologies is a laboratory that performs shielding effectiveness tests on site, directly
to the customer, in Italy and in Europe, or at its headquarters in Rimini - Italy.
We perform shielding effectiveness tests for several sectors:
- private
- industrial
- medical
- nautical
- aviation
- military
- scientifical
Typical shielding effectiveness measurement frequencies are: 10 kHz, 100 kHz, 500 kHz, 1 MHz, 10 MHz, 30 MHz, 100 MHz, 433 MHz, 700 MHz, 800 MHz, 900 MHz, 1 GHz, 1.5 GHz, 2.4 GHz, 3 GHz, 5 GHz, 5,8 GHz, 6 GHz, 10 GHz, 17 GHz, 18 GHz, 24 GHz (Industrial, Scientific, and Medical - ISM - band), 26.5 GHz, 30 GHz, 35 GHz, 40 GHz, 50 GHz, 60 GHz (Wireless communication and radar applications), 75 GHz, 77 GHz (Automotive radar systems), 94 GHz, 100 GHz, 110 GHz.
Our lab test can perform shielding effectiveness measurements up to 110 GHz.
Read more about it going back to the home page. Or if you are looking for a lab in order to test your product contact us via email or by phone simply clicking here.
Measurements are made according to customer specifications or in accordance with the main standards as below:
