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GTEM CELL RANGE

EMC Test Equipment — Engineered & Made in Italy

GTEM Cell Technology & Standards

Understanding Electromagnetic Compatibility Requirements

Key Performance Requirements
GTEM Cells are essential instruments for Electromagnetic Compatibility (EMC) testing. They allow engineers to perform accurate radiated immunity and emissions testing in a compact, fully shielded environment. Our equipment is designed to ensure the Transverse Electromagnetic (TEM) mode, which is verified using an isotropic 3-axis field probe. The cell requires a hybrid combination of precise resistors and RF absorbers to achieve a 50-ohm broadband match. While standard TEM cells are limited to approximately 1 GHz, our advanced GTEM cells are designed for higher frequencies, successfully validated up to 20 GHz. These requirements ensure that GTEM-based testing results are valid, repeatable, and correlate perfectly with conventional Open Area Test Sites (OATS) or Anechoic Chambers.

Main Regulatory Standards

IEC/EN 61000-4-20 Electromagnetic compatibility (EMC) - Part 4-20: Testing and measurement techniques - Emission and immunity testing in transverse electromagnetic (TEM) waveguides (Main Standard): This standard provides the authoritative requirements for electromagnetic compatibility testing in waveguide structures, including GTEM cells. It defines validation methods for field uniformity and test procedures for immunity and emissions.

Radiated Immunity ( IEC/EN 61000-4-3 Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test ): GTEM cells are widely used to test device immunity to radiated electromagnetic fields according to this critical specification.

Commercial & Product Standards: CISPR International Special Committee on Radio Interference (Comité International Spécial des Perturbations Radioélectriques) and EN Standards are fundamentally used for EMC testing to achieve CE marking across residential and industrial applications.

Industry-Specific Compliance

Automotive Standards ( SAE J1113-25 Electromagnetic Compatibility Measurement Procedure for Vehicle Components - Immunity to Radiated Electromagnetic Fields, 10 kHz to 1000 MHz ): Specifically designed for testing vehicle components, covering electromagnetic compatibility and immunity to radiated fields from 10 kHz to 1000 MHz.

Integrated Circuit (IC) Standards: Applied through IEC 61967-2/8 Integrated circuits - Measurement of electromagnetic emissions - Part 2/8: TEM cell and IC stripline methods for the measurement of electromagnetic radiation emissions from ICs, and IEC 62132-8/9 Integrated circuits - Measurement of electromagnetic immunity - Part 8/9: IC stripline and TEM cell methods for measuring IC immunity.

Medical & Military: Medical Equipment relies on IEC 60118-13 Electroacoustics - Hearing aids - Part 13: Electromagnetic compatibility (EMC) for testing electroacoustics and hearing aids. Military and Aerospace sectors apply testing in accordance with strict MIL-STD-461/462 Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment or RTCA DO-160C/D/E Environmental Conditions and Test Procedures for Airborne Equipment regulations.

READ THE FULL COMPLIANCE GUIDE

Who We Are

Founded in 2003 in Rimini, Italy, EmcTest Technologies operates over 1,200 square meters of laboratories and offices. We have grown into a unique structure that combines two complementary activities: providing accredited laboratory testing services and designing and supplying premium EMC equipment.

As a family-owned company of dedicated engineers and specialists, we support manufacturers in obtaining CE marking for electrical and electronic devices. We operate throughout Europe across the Electromedical, Automotive, Aeronautical, Marine, Railway, Industrial, IT, Telecommunications, Government, and Military sectors.

Over the years, we have built strong collaborations with companies as both customers and suppliers. Our continuous partnerships with university research groups allow us to deliver fast, cost-effective, and immediately applicable solutions to complex engineering challenges.

Our EMC Products

In addition to testing services, EmcTest Technologies designs and supplies professional equipment for EMC laboratories, including:

■ GTEM Cells in various sizes, designed and manufactured in-house
■ RF Power Amplifiers
■ Helmholtz Coils manufactured by our production team
■ Shielded Chambers for EMC and TEMPEST applications
■ Anechoic Chambers and Semi-Anechoic Tents
■ Reverberation Chambers
■ EMC Antennas for emissions and immunity testing
■ Specialized EMC test instruments and accessories

EmcTest Group Websites

All core laboratory services and corporate information are provided through our main website https://www.emctest.it. In addition, specific activities are supported by our dedicated websites:

Frequently Asked Questions

What is the main difference between a GTEM cell and a standard TEM cell?
Standard TEM cells are typically limited to frequencies up to 1 GHz. In contrast, GTEM cells (Gigahertz Transverse Electromagnetic Cells) are designed with an extended frequency range, successfully validated up to 20 GHz. This allows for comprehensive EMC testing at much higher radio frequencies in a compact environment.
What are the key advantages of using a GTEM cell for EMC testing?
GTEM cells provide a practical and cost-effective alternative to large anechoic chambers. They offer engineering-grade repeatability for both radiated immunity and emission analysis, reducing laboratory footprint and setup time while maintaining technically valid results.
Can GTEM cell results be correlated with anechoic chamber measurements?
Yes. International standards like IEC/EN 61000-4-20 ensure that GTEM-based testing results are valid and correlate well with conventional Open Area Test Sites (OATS) or fully equipped Anechoic Chambers. This makes them ideal for pre-compliance screening and design optimization.
Which international standard is the most relevant for GTEM cell applications?
The primary standard is IEC/EN 61000-4-20, which provides requirements for electromagnetic compatibility testing in waveguide structures. It defines validation methods for field uniformity and standard test procedures for both immunity and emissions measurements.
What primary industries utilize GTEM technology for compliance?
GTEM technology is essential for the Automotive industry (ISO 11452-3), Integrated Circuit designers (IEC 61967-2), Medical equipment manufacturers (IEC 60601-1-2), and any sector requiring CE marking for consumer or industrial electronics.
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