Example of electromagnetic shielding effectiveness test
ASTM D4935-18 : Test Method for Measuring the Electromagnetic Shielding Effectiveness of Planar Materials
emctest technologies performs shielding effectiveness tests
EMCTEST Technologies, Via Marecchiese 273, Rimini, ITALY
Phone: +39 0541 728562 | E-Mail: info@emctest.it

ASTM D4935-18 - MEASURING THE ELECTROMAGNETIC SHIELDING EFFECTIVENESS OF PLANAR MATERIALS

Shielding effectiveness test following the Standard ASTM D4935-18: The Standard ASTM D4935-18 describes how measuring the electromagnetic (EM) shielding effectiveness (SE) of a planar material for a plane, 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 as a result of decreased 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.
This test method is not applicable to cables or connectors.

EMCTEST Technologies is a leading test laboratory in Italy and Europe for electromagnetic shielding effectiveness testing. Thanks to advanced instrumentation and extensive experience in the field, we perform measurements from 10 kHz to 110 GHz on materials and devices intended for industrial, telecommunications, medical, military, automotive, railway, marine, aerospace, scientific, governmental, and civil applications.

Typical Test Frequencies

  • Low frequency: 10 kHz, 100 kHz, 500 kHz, 1 MHz
  • Mid frequency: 10 MHz, 30 MHz, 100 MHz, 433 MHz, 700 MHz, 800 MHz, 900 MHz
  • High frequency (RF and microwave): 1 GHz, 1.5 GHz, 2.4 GHz (ISM band), 3 GHz, 5 GHz, 5.8 GHz, 6 GHz, 10 GHz
  • Very high frequency: 17 GHz, 18 GHz, 24 GHz (ISM – Industrial, Scientific, and Medical bands), 26.5 GHz, 30 GHz, 35 GHz, 40 GHz, 50 GHz, 60 GHz (wireless communication and radar applications)
  • Millimeter wave: 75 GHz, 77 GHz (automotive radar systems), 94 GHz, 100 GHz, 110 GHz

Our test laboratory is equipped to perform shielding effectiveness measurements up to 110 GHz.


You can read more on the home page. If you are looking for a laboratory to test your product, you are in the right place – feel free to contact us by email or phone.

shielding effectiveness test example with 2 antennas
GENERAL APPLICATION FIELDS
Textiles
  • Shielded bags
  • Shielded shirts
  • Shielded card holders for RFID cards
  • Shielded pockets for jackets and shirts
  • Shielding fabrics for domestic environments against electromagnetic fields
  • Shielded suitcases for protection of sensitive devices or documents

Construction
  • Shielding panels and sheets for private rooms, shielded enclosures, medical rooms, or small shelters

Glass
  • Shielded glass for residential windows or interior partitions
  • Shielded glass for screens and small electronic devices

Applicable Solutions
  • Custom shielding solutions on request
  • Shielding sprays for residential use
  • Shielding paints for indoor use

Other Shielding Materials
  • Conductive films and shielding sheets for walls or domestic surfaces
  • Conductive gaskets and shielding foams for residential use
  • Shielding materials for IoT and consumer electronics
  • Shielding tapes for small devices or DIY applications
  • Shielding solutions for RFID cards and personal devices
  • Conductive paints and coatings for indoor applications
  • Not mentioned above

Oversize Products
  • Oversize Products
  • Aircrafts and airplanes
  • Shielded electrical cabinets / enclosures
  • Shielded trucks
  • Vehicles with shielded components
  • Shielded containers
  • Freighters
  • Ships
  • Military shelters

Buildings
  • Anechoic chambers
  • Professional shielded rooms
  • Complete buildings requiring shielding
  • Government buildings and security zones
  • Sensitive or restricted areas
  • Shielded rooms and technical environments
  • Medical shielded rooms

Glass Applications
  • Shielded screens for industrial and medical equipment
  • Shielded glass with or without conductive mesh
  • Shielded glass for railway applications

Applicable Solutions
  • Custom shielding solutions
  • Industrial or professional shielding sprays
  • Military-grade shielding paints

Other Shielding Materials
  • Telecom and wireless networking equipment
  • RF absorbers and layered shielding materials for critical environments
  • Automotive control units compliant with ISO 11452, CISPR 25
  • Conductive plastic or composite components
  • Medical devices compliant with IEC 60601-1-2
  • Conductive films, sheets, and tapes for electronics and telecoms
  • Conductive gaskets and shielding foams for industrial or military installations
  • RFID shielding materials for logistics or industrial use
  • Conductive paints and coatings for industrial, military or technical applications
  • Not mentioned above

shielding effectiveness graph
CONTACT US
For information regarding the shielding effectiveness test, or to get a quote, you can contact us by phone or write us an email.
  • Opening time: 9am to 6pm (UTC/GMT +01:00)
E-mail: info@emctest.it   |     Phone: +39 0541 728562
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