How EMC Anechoic Chambers Improve Product Compliance

Understanding EMC Compliance

Electromagnetic Compatibility (EMC) is defined as the capability of an electronic device to operate in the desired environment without producing unwanted electromagnetic interference (EMI) and without being influenced by external electromagnetic disturbances.

Various authorities across the world have made it mandatory that products must fulfill certain EMC requirements prior to their commercialization. Some of the common standards are as follows:

• CISPR standards
• IEC EMC standards
• European EN standards
• FCC regulations for USA
• Automotive EMC standards
• Military EMC standards

What Are EMC Anechoic Chambers?

EMC Anechoic chambers are unique shielded enclosures coated by RF absorbent material that prevents signal reflection and eliminates any interference outside. This provides a controllable environment for carrying out accurate EMC tests.

The chamber includes two vital characteristics:

• EM Shielding against external signals.
• RF absorption to prevent reflections.

These two features enable the engineer to conduct reliable EMC tests in accordance with international standards.

Why Accurate EMC Testing Matters

Today’s electronic products have several wireless systems, fast processors, switching power supplies, and communication modules that could produce electromagnetic interference.

Without testing, products might:

• Disturb other equipment
• Be non-compliant with regulatory standards
• Have poor performance
• Undergo costly redesigning
• Have delayed introduction to the market

An EMC Anechoic Chambe is the solution for achieving accuracy when testing for these problems.

How EMC Anechoic Chambers Improve Product Compliance

1. Remove Interference Caused by Outside Signals

Environmental interference is one of the major obstacles during EMC testing. It can be caused by radio transmissions, cell phone networks, wireless communications, and other electronic devices.

EMC chambers have highly developed shielding which makes testing environment free from outside electromagnetic radiation. This guarantees that emissions readings will be made only for the tested device.

Thus, it becomes possible for engineers to obtain reliable measurement data.

2. Ensure Consistent Testing Environment

The repeatability of results is a must for regulatory compliance. There can be a lot of fluctuations in open-area testing due to weather conditions, interference from outside equipment, and change of signals.

The stability of results improves their reliability and simplifies certification process.

3. Provide for International Compliance Standards

International EMC standards usually require a controlled environment for measuring emissions and immunity.

Using EMC chamber designed properly makes it easier for companies to meet the following standards:

• Requirements of CISPR 16
• Testing procedures of IEC
• Automotive EMC requirements
• Military EMC standards
• Aerospace testing standards

4. Detect EMC Issues Early

Identification of EMC problems in the later stage of the development process will raise costs.

Engineers use EMC chambers for research and development for identifying:

• Radiated emissions
• Conducted emissions
• Susceptibility problems
• Antenna coupling effect
• Signal integrity problems

Identification at the early stages allows design changes before the start of certification testing.

5. Increase Measurement Accuracy

Accuracy of measurement becomes important when products are running in proximity to their limits regulated by legislation.

The RF absorbers used in EMC Anechoic Chambers absorb reflections to achieve a near-free-space environment for accurate measurements.

Accurate measurements will increase the level of certainty and reduce the risk of non-compliance.

6. Accelerate Product Certification

Product certification delay may affect business negatively.

Reliable data from the EMC chambers allows engineers to:

• Avoid additional tests
• Avoid design changes
• Create certification documents
• Increase probability of compliance on the first attempt

Early product certification allows products to enter the market faster.

Industries That Benefit from EMC Anechoic Chambers

Automotive Industry

In modern vehicles there are many electronic components, such as radars, infotainment systems, battery management system and advanced driver assistance systems.

EMC testing is required for the proper functioning of the said systems without any interference.

Telecommunications

Wireless communication equipment requires stringent EMC compliance for their proper functioning.

Radio frequency testing of equipment in EMC chambers facilitates their proper certification.

Medical Devices

Electronics used in medical applications require the highest EMC compliance due to safety considerations.

EMC chamber facilitates accurate testing of the equipment for use in medical certification programs.

Aerospace and Defense

Equipment used in mission critical applications such as aerospace and defense require high EMC compliance even under tough environmental conditions.

EMC testing chambers provide reliable test results for the said applications.

Consumer Electronics

Smart phones, laptops, IoT, household appliances and other consumer electronic devices need to have compliance with EMC regulations for their international marketing.

Testing in EMC chambers provides compliance for their marketing.

Benefits of Modern EMC Anechoic Chambers

Benefits of Advanced EMC Anechoic Chambers go beyond meeting regulations.

Improved Automation

Current technology involves the use of automated antenna positioning, turntables, and measuring software.

Increased Testing Options

Chambers provide options such as:

• Pre-compliance testing
• Certification testing
• Testing of antennas
• Testing of wireless devices
• Research work on EMC
• Cost Savings on Product Development
• Earlier detection means less costly product redesign.
• Higher Product Reliability

Products that pass comprehensive EMC testing tend to be more reliable during actual use.

Pro Tip

Pro Tip: Use EMC testing earlier in the development process instead of waiting for certification. Pre-compliance testing in EMC Anechoic Chambers will ensure identification of problems well ahead of official testing and save a lot of time and money on product development.

Choosing the Right EMC Anechoic Chamber

Choice of an appropriate chamber is determined by a number of things:

• Required frequency range
• Product size
• Relevant compliance requirements
• Testing needs
• Sustainability into the future

It is advised that organizations choose EMC chamber manufactures with adequate experience.

At Diamond Microwave Chambers Ltd, we offer customized EMC Anechoic Chambers, RF anechoic chambers, among other innovative testing solutions, tailored to compliance, certification and development purposes.

With continuing development of technologies, the issue of EMC compliance gains importance. Manufacturers need to ensure that their products comply with applicable regulations without losing in their performance, reliability and preparedness to go to market.

EMC Anechoic Chambers allow creation of an environment which allows performing EMC testing in an accurate way. It eliminates interference from outside, reduces measurement uncertainties, complies with international standards, and allows detection of problems earlier on in the process.

Investment in quality testing infrastructure leads to faster compliance processes, reduced costs, and more confident performance of products.