ERETEC | Precision EMC Anechoic Chambers Built for Extreme Environments

1. Why EMC Anechoic Chamber Technology Matters Now

Electrification, autonomous driving, high-density avionics, hydrogen–electric propulsion, maritime radar and navigation systems—today’s mission-critical industries share one defining characteristic:
they all depend on highly integrated electronic systems that are extremely sensitive to electromagnetic interference (EMI).

• Automotive: A mobile platform densely packed with ADAS, infotainment, high-voltage powertrains, low-voltage control units, wireless connectivity, and countless sensors.

• Shipbuilding: A maritime platform where propulsion systems, generators, radar, navigation equipment, and wireless communication systems coexist in tight spaces.

• Aerospace: Navigation, communication, control, and payload systems integrated at exceptionally high density within aircraft and launch vehicles.

In these environments, EMI is not merely noise—it is a risk directly connected to safety, mission success, and human life.
This is why EMC compliance with CISPR, ISO, MIL-STD, IMO, and other stringent global standards is no longer optional but foundational.

Among the companies that have repeatedly demonstrated proven technological leadership across the most demanding industrial sectors—automotive, marine, and aerospace—is ERETEC Inc.

 

2. What Exactly Is an EMC Anechoic Chamber?

An electromagnetic anechoic chamber is an artificial free space that completely blocks external electromagnetic waves and minimizes internal reflections.
The Faraday cage structure—surrounded by highly conductive metal panels—fundamentally eliminates external noise, while RF absorbers on the inner walls suppress reflections, creating a clean environment in which only the measurement signal (EUT) can be accurately captured.

This perfectly shielded space is constructed by organically integrating galvanized-steel shielding panels as the primary frame, specialized reinforced shield doors, and EMI filters and honeycomb air vents that prevent even the slightest leakage through power and air pathways.

Such precision engineering meets demanding international standards such as CISPR 25 and ISO 11452. The key lies in determining where and to what performance level the chamber should be implemented according to the customer’s intended use, and this optimized design capability is one of ERETEC’s core competitive strengths.

 

3. Customized Chamber Engineering for High-Complexity Industries

i) Large-Scale Automotive EMC Chambers for EVs and FCEVs

The rise of EVs, hydrogen-electric vehicles, and autonomous systems has sharply increased EMC requirements in the automotive sector. High-voltage and low-voltage systems now interact with RF, cellular, radar, and wired/wireless communication within a single platform.

ERETEC partnered with leading automotive research institutes to build a 10-meter anechoic chamber capable of full-vehicle EMC testing.

① Supports full-vehicle testing of electric and hydrogen electric vehicles

• High shielding effectiveness, uniform field distribution
• Integrated testing of ADAS, powertrain, charging systems, and more

② Fully integrated, customer-specific test infrastructure

• ERETEC-designed independent 6-axis chassis dynamometer
• 11-meter integrated turntable for large vehicles
• Test configurations reflecting acceleration, braking, and realistic on-road load conditions

This project is widely regarded as a landmark example of ERETEC’s advanced design, engineering, and system integration capabilities.

ii) Marine & Shipbuilding EMC Chambers Recreating Harsh Maritime Environments

Marine platforms operate some of the most challenging EMC environments on Earth. High-power equipment and sensitive communication/navigation systems share limited space, while maritime operations require absolute reliability.

For the Korea Research Institute of Ships & Ocean Engineering, ERETEC built
special-purpose EMC and radio communication test chambers for small and mid-size vessels.

① Compliance with international maritime EMC requirements

• Meets shielding, attenuation, SVSWR, field uniformity, and noise-floor criteria
• Completely blocks electromagnetic ingress from external marine environments

② Eco-friendly, high-power-resistant absorbers

• Maintains stability under extreme field strength and long-duration testing

③ Noise-controlled internal test environment

• Low-noise positioners, CCTV, filters, lighting—optimized for EMS and low emission
• Prevents contamination of test results from auxiliary equipment

This chamber is now core infrastructure for evaluating EMC performance of maritime propulsion, wireless systems, and onboard electronics.

iii) Aerospace EMC & Antenna Test Facilities for Satellites and Launch Vehicles

Aerospace systems enforce the strictest EMC requirements due to their mission-critical nature. Any EMI-induced malfunction can compromise flight safety or satellite mission integrity.

For an aerospace prime contractor, ERETEC is constructing a suite of satellite EMC chambers and horizontal near-field antenna measurement systems.

The objectives include:

• High-reliability EMC and antenna test environments for satellite units and launch-vehicle components
• Full certification capability at the unit and subsystem level
• Strengthening national competitiveness in the global space industry

ERETEC’s aerospace chambers are engineered as essential national testing infrastructure for satellite and launch-vehicle development.

 

4. Reproducible Test Environments Through Automated Measurement Systems

Recreating extreme environments alone is not enough. The reliability of a test environment is proven only when the same DUT, under the same conditions, produces identical results across repeated tests. To achieve this, ERETEC develops a range of proprietary electromagnetic measurement automation solutions that integrate seamlessly with its chambers.

EMC Automated Measurement System

In the EMC automated measurement system, antennas can be automatically exchanged and moved according to frequency during Radiated Emission (RE) and Radiated Immunity (RI) tests, and the entire test sequence can be executed with a single click by linking with dedicated control and analysis software.
In addition, the four independently controlled antenna positioners enable automatic positioning under various conditions; after tests are completed, antennas are parked vertically and the power to the positioners is turned OFF to minimize potential noise sources.

Radiated Spurious Emission (RSE) Simultaneous Measurement System

To measure spurious emissions radiated outside the permitted bands of wireless devices quickly and accurately, ERETEC developed an automated system that simultaneously measures vertical and horizontal polarization. This has reduced test time and accelerated development schedules, while the standardization of test procedures and automated data logging have significantly improved certification response efficiency.
Compared with manual measurements, test quality has improved and measurement uncertainty has been reduced.

ISO 11452-9–Based Automated Portable Transmitter Test System

An ISO 11452-9–based automated test system for automotive portable transmitters (such as keyless entry devices) is another representative solution from ERETEC.
By utilizing a robotic positioning device, antenna placement can be remotely and precisely controlled from outside the chamber, and the system synchronizes perfectly with automated test software to consistently manage test start/stop and positional changes.
Furthermore, it can be easily expanded to support Magnetic Field Immunity, Magnetic Field Emission (ICNIRP), and ESD tests, enabling a wide range of electromagnetic environment evaluations within a single multi-purpose infrastructure.

 

5. Behind Every Extreme-Environment Chamber Lies Custom Engineering and Automation

ERETEC’s strength lies in the fact that our work does not end with simply designing and delivering a chamber.

We operate a design and verification system that satisfies both international standards (CISPR, ISO, IEC, MIL, IMO, etc.) and the requirements of domestic and overseas customers. Based on our in-house research laboratory and registered manufacturing plant, we have established an End-to-End supply system—from design, production, and installation to validation and maintenance.

Even after delivery, we support long-term test accuracy through performance monitoring, regular maintenance, and remote diagnostics.

As automobiles become computers on wheels, and ships and satellites evolve into moving data centers, electromagnetic anechoic chambers have become essential infrastructure that upholds industrial safety and reliability.

• Custom chamber designs specialized for automotive, marine, and aerospace industries
• Reproducible test environments created by integrating automated measurement solutions and software
• An E2E total solution covering everything from design to maintenance

ERETEC is proving its competitiveness not only in Korea but also in global markets.
Going forward, as a technical partner that solves customers’ EMC and electromagnetic challenges together, ERETEC will continue to advance the technological level of electromagnetic anechoic chambers and automation solutions, providing test infrastructure that remains reliable even under extreme conditions.