cSAR3D V4.0: A Breakthrough in Array System Technology

The new X10 Combiner gives cSAR3D Flat phantoms higher measurement resolution, driving the measurement uncertainty below 30% for any source and extending the frequency range to 10 GHz.

cSAR3D V4.0 marks a major advancement for vector measurement-based array measurement systems: the newly integrated "X10 Combiner", a novel algorithm developed by the IT'IS Foundation that reliably combines multiple randomly shifted individual measurements onto a high-resolution grid, eliminates the physical limitation of the sensor density of fixed arrays by virtually increasing the spatial sampling resolution. As a result, the frequency range of cSAR3D has been extended to 10 GHz and the uncertainty has been reduced to 30% for any source. The timing is perfect as the Federal Communications Commission (FCC) and other regulators have recently opened unlicensed spectrum above 6 GHz and the soon-to-be-published IEC/IEEE Standard 62209-1528 includes SAR measurement procedures up to 10 GHz.

The key new features of cSAR3D V4.0 are:

  • X10 Combiner – novel spatial combining algorithm to give a higher measurement resolution
  • Extended frequency range up to 10 GHz
  • Estimation of absorbed power density (epithelial power density) for comparison with new limits in new ICNIRP guidelines and the IEEE C95.1 standard
  • Even faster measurement time

The user video nicely illustrates these new features and how easy they are to use.

Higher Measurement Resolution

The spatial combining algorithm, called the X10 Combiner, is easy to use and does not require any new equipment. The software guides the user to make multiple measurements with the device at random positions on the cSAR3D Flat. It then automatically determines the shift in the device position from the specific absorption rate (SAR) distribution and uses these shifts to reconstruct the 3D pattern using these high-density measurement points. Thus, the physical resolution can be overcome, allowing measurement of devices having very sharp SAR distributions.

Extended Frequency Range

SPEAG extended the frequency range of DASY6 last year to include the 6 – 10 GHz frequency range and has now done the same for the cSAR3D Flat. This meets the emerging needs of wireless device manufacturers to test Wi-Fi and 5G devices in this frequency range.

No change is needed to the cSAR3D hardware. The miniature sensors inside the phantom have good sensitivity and are electrically small at 10 GHz. The tissue-equivalent medium is already compatible with the requirements for dielectric parameters up to 10 GHz. The only requirement is that the cSAR3D Flat or Quad is re-calibrated to include the 6 – 10 GHz frequency range. Note that SPEAG is now accredited to ISO/IEC 17025 for calibration of cSAR3D Flat and Quad at all frequencies in the 650 MHz – 10 GHz range.

cSAR3D V4.0 leads to a significant accuracy improvement for very localized SAR distributions. The full IEC 62209-3 validation (264 test conditions) has been performed on the cSAR3D Flat using the X10 Combiner as well as single measurements. Additional validation tests have been performed in the 6 – 10 GHz frequency range using the X10 Combiner. The results show that all combined values are within +/-1 dB of the target values indicating that the measurement uncertainty when using the X10 Combiner is less than 30% for any source.

Absorbed power density

Another novelty is that cSAR3D V4.0 also assesses and displays the absorbed power density (also known as epithelial power density in IEEE C95.1) averaged over an area of either 1 cm2 or 4 cm2. These dosimetric limits have been defined by ICNIRP (2020) and IEEE C95.1 (2019) in the frequency range above 6 GHz. It is expected that these new basic restrictions will soon be adopted by regulators.

Faster Measurement

SPEAG has also improved the measurement speed. The assessment time is now 2.6 s including acquisition, evaluation of 3D field reconstruction, calculation of uncertainty, and graphical output of the results. This also improves throughput for quality assurance testing in factory environments. Wireless device manufacturers have implemented cSAR3D for factory sampling due to its speed and automation features.

cSAR3D V4.0, together with the manual, are available for download here.





cSAR3D is the Chosen Solution in Egypt

A cSAR3D system was recently delivered and installed at the Egyptian National Telecom Regulatory Authority in Cairo.





SPEAG’s & CTIA’s New Forearm Phantom SHO-GFPC-V1

Standardized Over-The-Air (OTA) evaluation of wrist-worn devices in a precise and repeatable fashion.





New OTA Phantom Optimized for Testing Head-Mounted Wearables

SPEAG’s new OTA phantom SAM V4.6BSE provides maximum flexibility for testing wearable devices mounted to the head.





Quick cSAR3D Measurement of Wireless Device

Fast SAR measurements are easier than ever! Watch a new user video demonstrating the features of cSAR3D V2.8.





cSAR3D Measurements in Great Demand

China Telecommunication Technology Labs-Terminals (CTTL-Terminals), China’s premier wireless testing authority, is now routinely applying SPEAG’s vector measurement-based array system cSAR3D for pre-compliance evaluations of wireless devices for several of China’s manufacturers.





Brief Update: IEC 62209 Standard Meeting Exceeds Expectations

cSAR3D closes the gap between innovation and Compliance.





New Holder Adaptor Eliminates All Steps on Testing Its Influence on SAR

The new low-loss low-permittivity adaptor eliminates all steps on testing the holders influence on SAR measurements.





Making Waves: Revolutionary Probe for 5G

The novel EUmmWV2 probe enables precise very close near-field measurements for frequencies up to 110 GHz.





Zurich43 Retreat 2017 at Pilatus Kulm - Communication

Twenty-five Zurich43 associates and three IT'IS Foundation board members gathered in the historic Hotel Pilatus-Kulm high above Luzern 30 – 31 January 2016 for their annual retreat, this year on communication. The goal of the two-day retreat was to find ways to improve communication skills across various target groups, channels, and markets, both within Z43 and with the outside world.





cSAR3D Cal Lab

SPEAG invests in the future of dry SAR testing systems: New standards drive dedicated Cal Lab

In order to comply with the requirements of the upcoming IEC 62209/ Part 3 SAR testing standards, SPEAG has set up a dedicated laboratory for calibrating ‘dry’ SAR testing systems at their manufacturing facility located in the heart of Zurich. The laboratory complements their already existing and well-established ‘wet’ SAR system service centre.

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