CEDAR PARK, Texas, June 2, 2022 – Active technical contributors to the American National Standards Committee (ANSC) C63 on EMC (Electromagnetic Compatibility) convened at ETS-Lindgren's corporate headquarters in Cedar Park, Texas, May 16 to 19, 2022. A highlight of the four-day meeting series was the live demonstration time spent in the company's EMC and Wireless Test Labs. Two demonstrations were conducted to evaluate new test methodologies for consideration in the new draft standard ANSI C63.25.3. Zhong Chen, ETS-Lindgren's Director, RF Engineering and Chair of C63 Subcommittee 1 "Techniques and Development," conducted the first demonstration with Yibo Wang, ETS-Lindgren's RF Engineer, and Phil Miller of RATLR Inc. using the 3-Meter EMC Test Chamber. The demonstration showed a new test method using a mode-filtered site voltage standing wave ratio (SVSWR) technique for qualifying chambers in the mmWave range per the draft standard ANSI C63.25.3.

The second demonstration focused on measurements of total radiated power (TRP) in a Reverberation Chamber using a commercial mmWave base station at 28 GHz (band n261) as the device under test. This activity supports C63's Subcommittee 4 "Wireless and ISM Equipment Measurements" standards as well as the draft standard ANSI C63.25.3. Two verification engineers from Ericsson, Patrik Hellstrom and Lars Näs, assisted by Cindy Xie, ETS-Lindgren's RF/Microwave Systems Engineer, demonstrated the capability of the Reverberation Chamber to correctly estimate the TRP of weak spurious emissions coming from a massive device with a large antenna array and high RF output power. Both demonstrations showed faster, much more efficient measurement techniques as an alternative to those specified in the present standards. As a result of the demonstrations, not only did the committee members learn new test methods to consider including in future standards, but those performing the demonstrations also appreciated suggestions from the committee to further improve these new measurement techniques.

For reference, C63 maintains a series of site validation standards:
C63.25.1 – A published standard for EMC test sites from 1 GHz to 18 GHz
C63.25.2 – A new standard under review by the C63 Main Committee for EMC test sites from 30 MHz to 1000 MHz
C63.25.3 – A draft standard under development for EMC test sites from 18 GHz to 40 GHz
"These test site validation standards will play a key role in future revisions to the industry flagship standards ANSI C63.4 'Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz' and ANSI C63.5 'Radiated Emission Measurements in Electromagnetic Interference (EMI) Control Calibration of Antennas (9 kHz to 40 GHz),'" said Dan Hoolihan, Hoolihan EMC Consulting's President and ANSC C63 Committee Chair. "Site validation measurement techniques will be removed from these standards and referenced in the C63.25 series of standards as appropriate. With the wider frequency ranges we're seeing now, in addition to wireless measurements becoming an increasingly important part of our traditional EMC activity, it makes sense to move site validation measurement techniques to its own family of standards based on the frequency range of interest."

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