Anechoic Chambers for EMC testing
EMC Anechoic Chambers are used while performing electromagnetic compatibility tests of equipments or systems. Most of the product standards require EMC testing to be done in isolated test chambers. The best isolated test chambers are anechoic chambers since they are both shielding unwanted RF signals and absorbing inner reflections.
Metallic outer surface of the EMC anechoic chambers avoid RF signals to come inside the chamber, this eliminates ambient noise of the open area. Shielding performance of the metallic constructure is determined by Shielding Effectiveness (SE) parameter. EMC anechoic chambers with minimum 100dB shielding effectiveness is preferred in the market since there are chamber validation standards. After installation of the shielded enclosure these performance measurements can be done by third party service providers to ensure the shielding level is satisfactory.
Inner suface of the EMC anechoic chambers are covered by RF absorbing materials like ferrite tiles and/or RF absorbers with different shapes. The most well known RF absorber shape is pyramidal. RF absorbing materials absorbs some portion of the incoming (incident) RF signal and this absorbtion rate is determined by Reflectivity parameter of the absorber. RF absorber’s datasheet shows reflectivity parameters in -dB.
EMC anechoic chambers also include RF shielded components, additional items. These components and items are integrated to the anechoic chamber during the installation. RF shielded doors, honeycomb air vents, I/O panels, lighting system, audio and video monitoring systems, turntables and antenna masts are the well known additional items to be integrated to the EMC anechoic chambers.
We offer EMC anechoic chambers for every industry. Contact us and get your quote.
EMC Anechoic Chamber Types
Semi Anechoic Chamber (SAC)
Fully Anechoic Chamber (FAC) or Fully Anechoic Room (FAR)
CISPR 25 Automotive Component Chamber (ALSE)
CISPR 25 Automotive Vehicle Chamber (ALSE)
Reverberation Chamber
Complying with chamber standards
EMC anechoic chambers we offer comply with the international and chamber requirements. Shielding Effectiveness, NSA, sVSWR, Field Uniformity and any other validation measurements can be performed by third party validation laboratories.
Standard and Customized Design
We are offering both our standard anechoic chamber solutions and customized solutions according to your specific requirements. If you have any technical requirement or limitations, we can customized the EMC anechoic chamber design for you.
Delivery and Installation
After all anechoic chamber components arrive on site, installation starts with our installation including at least one supervisor. Our installation team is highly skilled and experienced in installing anechoic chambers. When installation completed, if you ordered, validation of the anechoic chamber is done by performing some tests. This is done either by our agreed partner or independent accredited laboratory.
Essential Parameters of EMC Anechoic Test Chambers
1. Chamber Type
2. Dimensions
3. Reference EMC Standards
4. Frequency Range
5. I/O Ports
Choose Chamber Type
Choose your EMC anechoic chamber type. Are you looking for a Semi Anechoic Chamber (SAC), Fully Anechoic Chamber (FAC), Reverberation Chamber or any other chamber type. Choosing the right chamber type is essential when investing a new EMC anechoic chamber. Your reference to define chamber type should be your product’s EMC requirements and standards. The purpose of EMC anechoic chamber is also essential, are you looking for anechoic chamber for pre-compliance EMC testing or fully-compliance EMC testing?
Define Chamber Dimensions
Define the chamber’s inner and outer dimensions according to your product’s EMC requirements and your existing building. Drawing a draft anechoic chamber and your existing building would make things easier. Any space limitation can be customized. For instance most EMC labs prefer 9x6x6 m SACs for 3m measurements, however these sizes can slightly be changed if you have any limited space.
List EMC Standards
Depending on your product’s EMC requirements you should list some EMC measurement standards that will be applied by using the anechoic chamber. In additon, if you are looking for fully compliant EMC anechoic chamber, chamber compliance standards like CISPR 16 shall be mentioned on your requirement list. Product developers, designers and manufacturers might prefer to ignore some parameters of these standards, but these details should be discussed prior to quotation or installation. Accredited test laboratories mostly prefer to follow all of the anechoic chamber requirements mentioned on the standards since they use the anechoic chamber for certification. Any deviation from the standards should be noted and this would be easier to compare offers of different anechoic chamber manufacturers.
4. Define Frequency Range:
Defining the frequency range of an EMC anechoic chamber consists of a chart showing the applicable tests and their frequency ranges. For instance, the anechoic chamber can be used for Radiated RF Immunity tests between 80MHz and 6GHz and/or Radiated Emissions tests between 30MHz and 18GHz. These tests and frequencies shall be noted on your anechoic chamber requirement list or document. EMC test laboratories who has no RF shielded enclosures or screened rooms might prefer to perform all EMC tests inside the anechoic chamber. For such tests, like Conducted RF Immunity, the frequency range may go down to 150kHz or less. Most of the EMC anechoic chamber’s RF shielding performance go down to 10kHz. Defining your frequency range with mentioning the measurement and test parameters would make the quoting process easier.
5. List I/O Ports of the Anechoic Chamber:
To supply power, signals inside the chamber, power line EMI filters and signal line filters are used on the outer walls of the chamber. To define filter specifications you should list power requirements in Volts, Amperes and Watt. If your EUT needs additional signals like RF, video, audio, ethernet, listing these ports would add the corresponding connectors on I/O panel of the anechoic chamber. Filtered or RF shielded lines are allowed to enter inside the chamber to operate the EUT and its accessories properly. List the signals you would like to use inside the anechoic chamber, otherwise no signal is allowed!
Turn-key EMC Anechoic Chamber Solutions
We are offering turn-key EMC anechoic chamber solutions including the anechoic chamber, test systems, equipments, antennas, test benches, test software, cables and any required item during your tests. Our EMC anechoic chambers are radiated emissions and radiated immunity measurements for the products used in Automotive, Defense, Medical, Consumer Electronics, Machinery, RF communication, Telecommunications, Wireless and RF Technologies.