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EMC GTEM 250

GTEM CELL EMC GTEM 250 IEC 61000-4-20

EMC GTEM 250
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Product Overview

The GTEM 250 is a TEM waveguide with the upper frequency limit extended to the GHz range. Ideal for small EUTs and pre-compliance testing.

The EMC GTEM 250 is engineered for precision and reliability, meeting IEC/EN 61000-4-20 standards.
Standard Configuration Included:
INOX; 1x PLF-16S; 1x FT-N; 2x FT-SMA; 1x FOPT-3; 1x 7/16(F); 1x IEC-16A; 1x N(F); FERRITE
Open Datasheet
Frequency Range100 kHz to 20 GHz
Septum Height250 mm
Max Input Power250 W (Continuous)
Input ConnectorN type (Female)
Nominal Impedance50 Ohm
Typical VSWR1:1.2 (up to 5GHz)
Shielding Effectiveness> 60dB (typ. > 80dB)
Dimensions (LxWxH)115 x 60 x 42 cm
Weight25 Kg (approx)
Door Size (WxH)30 x 20 cm
EUT Max Size20 x 20 x 15 cm
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Do you want to select the standard configurations automatically?
Later you can choose other options or change some.
Select Qty Code Description
DUT-BOX-250 3 Axis Positioning System: Transparent polycarbonate glass box suitable to define effective test volume and positioning the DUT.
ESI-250 Electrical safety interlock
SHW-250 Shielded Window in door
SHWB-250 Removable metal shielded window blinder (for highest shielding)
WE1EMCGTEM-250 Warranty extension to 3 years in total
INOX Fully INOX steel rugged military grade construction Standard
PLF-16S Single Phase AC Power Line Filter 2x 16A Phase+N+Ground Standard
FOPT-3 Channel for fibre optic leads (3 fiber pairs) Standard
FT-SMA RF feed-thru SMA type connector Standard
FT-N RF feed-thru N type connector Standard
7/16(F) 7/16" - Female Input Connector (max. 8GHz) Standard
IEC-16A IEC 16A 250V AC (Single Phase) Standard
N(F) N Female Input Connector (max. 20GHz) Standard
FERRITE Ferrite tiles installed on the bottom of the GTEM cell, combined with hybrid pyramidal absorbers to achieve excellent highfrequency performance Standard
WHEEL Wheeled undercarriage with brakes
VPOS GTEM Vertical positioning - Plastic table over absorbers - 90° turned door turn of door position, plastic table over pyramids, included the vertical wheeled undercarriage
AIRVENT55 Air venting shielded window 50x50 mm
AIRVENT88 Air venting shielded window 80x80 mm
AIRVENT120 Air venting shielded window 120x120 mm
DCF-120 Single pole Filtered AC/DC Feedthru 120A 1700VDC/250VAC
FPT-DB25 Filtered 25-poles pass-thru RS-232 (DB25)
FPT-DB9 Filtered 9-poles pass-thru RS-232 (DB9)
FPT-DC10 N.2 filtered 10A 600V DC banana socket pass-thru
FPT-DC120 N.2 filtered pass-thru 120A 500V DC - M8 stud connection
FPT-DC200 N.2 filtered pass-thru 200A 500V DC - M10 stud connection
FPT-DC300 N.2 filtered pass-thru 300A 500V DC - M10 stud connection
FT-ANYCABLE Anycable Flexible inox steel pipe feedthru 20cm long 1inch diameter - modular system.
FT-AIR Gas/air waveguide Feedthru
FT-BNC RF feed-thru BNC-BNC Female panel mount type connector
FT-BNC/SMA RF feed-thru BNC-SMA Female panel mount type connector
FT-RJ45 Shielded RJ45 (RJ11) feed-thru female-female connector
FT-RJ45F RJ45 (RJ11) 1Gbps filtered Feedthru connector female-female
FT-USB2 USB 2.0 shielded Feedthru
FT-USB3 USB 3.0 shielded Feedthru
FT-USB3F USB 3.0 Type A Female Filtered Feedthru
FT-USBC USB Type C shielded Feedthru
HCOMB-10 Honeycomb 10x10cm venting / audio feedthru air intake/outtake
HCOMB-20 Honeycomb 20x20cm venting / audio feedthru air intake/outtake
HN High Voltage N Connector (Usable for burst pulses only) - Max freq: 3GHz
HPTER-250 Hi Power terminations 500W continuous power up to 3GHz
ILED Indoor LED lighting shielded lamp
US-WIRING Wired for U.S. 110VAC
PDTP Technical panel pre-drilled for options with EMC gaskets and inox bolts
PLF-20S Single Phase AC Power Line Filter 2x 20A P+N+PE
PLF-32S Single Phase AC Power Line Filter 2x 32A P+N+PE
PLF-40S Single Phase AC Power Line Filter 2x 40A P+N+PE
PLF-60S Single Phase AC Power Line Filter 2x 60A P+N+PE
PLF-16T Tri Phase AC Power Line Filter 4x 16A 3P+N+PE
PLF-20T Tri Phase AC Power Line Filter 4x 20A 3P+N+PE
PLF-32T Tri Phase AC Power Line Filter 4x 32A 3P+N+PE
PLF-64T Tri Phase AC Power Line Filter 4x 64A 3P+N+PE
PWS-16S Additional Power Socket for EUT - 2x16A P+N+PE
PWS-32S Additional Power Socket for EUT - 2x32A P+N+PE
PWS-16T Additional Power Socket for EUT - 4x16A 3P+N+PE
PWS-32T Additional Power Socket for EUT - 4x32A 3P+N+PE
PWS-64T Additional Power Socket for EUT - 4x64A 3P+N+PE
SAE Door for tests acc. to SAE J1752/3 - Integrated Circuit
USB-CAM Lithium Battery Powered Shielded USB to Fiber Optic Camera System (Full HD, Autofocus)

Key Performance Requirements

TEM Mode Verification: Testing must ensure the GTEM operates in the Transverse Electromagnetic (TEM) mode, which is verified using an isotropic 3-axis field probe.

Frequency Range: While standard TEM cells are limited to ~1 GHz, our advanced GTEM cells are designed for higher frequencies, successfully validated up to 6 GHz and beyond (up to 20 GHz for some models).

Uniformity & Termination: The cell requires a hybrid combination of precise resistors and RF absorbers to achieve a 50-ohm broadband match.

Compliance & 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): Provides the authoritative requirements for electromagnetic compatibility (EMC) 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 used to test device immunity to radiated electromagnetic fields.

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

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

Commercial & Product Standards: CISPR International Special Committee on Radio Interference (Comité International Spécial des Perturbations Radioélectriques) /EN Standards used for EMC testing to achieve CE marking (e.g., Residential/Industrial).

Medical Equipment ( IEC 60118-13 Electroacoustics - Hearing aids - Part 13: Electromagnetic compatibility (EMC) ): Often used for testing electroacoustics and hearing aids.

Military/Aerospace: Applied for testing, often in accordance with 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 .

Complete your Setup with RF Amplifiers

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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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