TEM Cell and GTEM Cell for Electromagnetic Compatibility Testing
| Origin | Italy |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | TEM Cell / GTEM Cell |
| Pricing | Available Upon Request |
Overview
The TEM (Transverse Electromagnetic) Cell and GTEM (Gigahertz Transverse Electromagnetic) Cell are standardized, shielded electromagnetic test enclosures engineered for radiated emissions and immunity testing of small- to medium-sized electronic devices. Operating on the principle of a broadband, controlled TEM-mode wave propagation within a tapered, septum-loaded rectangular waveguide structure, these cells provide a uniform, calculable electric and magnetic field distribution over a defined test volume. Unlike open-area test sites (OATS), TEM and GTEM cells enable repeatable, laboratory-based EMC measurements under controlled environmental conditions—eliminating dependence on weather, ambient RF noise, and physical site validation requirements. The GTEM cell extends the usable frequency range beyond that of conventional TEM cells—typically from DC to 6 GHz or higher—by incorporating a carefully designed taper and absorber-lined walls to minimize reflections and higher-order mode generation.
Key Features
- Shielded, fully enclosed architecture compliant with CISPR 16-1-4, ANSI C63.4, and IEC 61000-4-20 for reproducible field uniformity assessment
- TEM cell design optimized for frequencies up to 200 MHz; GTEM cell supports extended broadband operation from DC to ≥6 GHz
- Integrated field calibration ports and built-in E/H-field probes for real-time field monitoring and traceable metrological validation
- Modular construction with RF-tight access doors, feedthroughs for power/control lines, and standardized 50 Ω coaxial interfaces
- Compatible with standard EMC test receivers, signal generators, and power amplifiers per IEC 61000-4-3 and IEC 61000-4-6 test configurations
Sample Compatibility & Compliance
These cells accommodate devices under test (DUTs) up to 0.5 m × 0.5 m × 0.5 m (TEM) or 1.2 m × 1.2 m × 1.0 m (GTEM), depending on model variant and field uniformity requirements. DUT placement follows strict positioning protocols defined in CISPR 16-1-4 Annex B and ANSI C63.4–2022 Section 8.2 to ensure representative coupling and minimal field distortion. All units are supplied with full compliance documentation—including shielding effectiveness reports (per IEEE Std 299), field uniformity maps (±3 dB over specified volume), and traceable calibration certificates aligned with ISO/IEC 17025-accredited laboratories. Units meet EN 55032/55035 radiated emission and immunity pre-compliance requirements and support GLP-aligned test record retention.
Software & Data Management
The integrated PES (Pre-compliance Evaluation Software) platform enables automated field mapping, real-time correction of measured data to equivalent OATS (Open Area Test Site) reference levels, and comparative analysis against regulatory limits (e.g., FCC Part 15, EN 55032 Class B). PES implements the correction algorithms specified in CISPR 16-2-3 Annex D and ANSI C63.4–2022 Appendix D, accounting for chamber-specific transfer functions, antenna factor deviations, and cable loss compensation. The software supports export of fully annotated test reports in PDF and CSV formats, complete with metadata timestamps, operator ID, instrument configuration logs, and audit trails compliant with FDA 21 CFR Part 11 and ISO/IEC 17025 documentation requirements.
Applications
- Radiated emissions pre-compliance screening for IoT modules, automotive ECUs, medical electronics, and consumer wireless devices
- Radiated immunity testing per IEC 61000-4-3 at field strengths up to 10 V/m (with external amplifier)
- EMI troubleshooting and near-field source localization using calibrated probe scans inside the cell
- Antenna pattern characterization and coupling studies in controlled TEM-mode environments
- Education and R&D labs requiring cost-effective, space-efficient alternatives to semi-anechoic chambers
FAQ
What is the primary difference between a TEM cell and a GTEM cell?
The TEM cell operates effectively up to ~200 MHz and uses a parallel-plate structure; the GTEM cell employs a tapered, pyramid-shaped enclosure with RF absorbers to extend usable bandwidth into the GHz range while maintaining field uniformity.
Can TEM/GTEM test results be used for formal certification?
No—these cells are intended for pre-compliance screening only. Final certification requires testing in accredited OATS or fully anechoic chambers per CISPR 16-1-4 Clause 7.
Is PES software included with the system?
Yes—PES is supplied as part of the standard delivery package, including perpetual license, firmware updates, and technical support for configuration and validation.
Are calibration services available post-installation?
Yes—on-site or lab-based field uniformity and shielding effectiveness calibrations are offered annually or per ISO/IEC 17025 requirements.
Do these cells require special grounding or facility modifications?
They must be installed on a dedicated, low-impedance ground plane connected to the facility’s earth reference; no structural reinforcement or RF-filtered AC supply is mandatory but recommended for optimal performance.
