cSAR3D Software

Simultaneous Transmission Combining

Accurate combining of SAR distributions from devices that transmit two or more signals simultaneously. This includes non-correlated signals that may transmit in different frequency ranges or with different modulations. cSAR3D also has the ability to evaluate correlated signals (Type 1 and Type 2).

The combined 3D SAR distribution is visualized in the user interface.

Time-Average SAR Measurements

Real-time evaluation of of dynamic power control and antenna switched diversity employed on wireless devices. Two time-averaged SAR testing modes are implemented:

• psSAR Time-Average SAR: determines the peak 1-gram and 10-gram average SAR at every time point (3 times per second) and averages them over a user-defined averaging window. This is valid for a single antenna transmitting at a variable power over time.
• Volume Time-Average SAR: stores the SAR at every point in the volume at every time point (3 times per second) and finds the peak spatial-average and time-average SAR. Valid for all cases, including antenna switched diversity. 

High-Resolution Spatial Combining

The X10 Combiner is a novel algorithm that reliably combines multiple shifted SAR measurements to create a high-resolution SAR measurement. This is ideal for accurate evaluation of spatially sharp SAR distributions, as it overcomes the physical limitation of the sensor grid. This feature allows the frequency range of cSAR3D to be extended to 10 GHz while maintaining the uncertainty below 30 %.

The X10 Combiner is implemented on the Flat phantom for manual cSAR3D measurements.

DASY8^3Doffers an even more advanced combiner offering improved precision with less extra measurements.  

Absorbed Power Density

In the 6 - 10 GHz frequency range, the software automatically calculates the absorbed power density (APD, also known as epithelial power density) together with the SAR. The APD is calculated from the measured SAR for 1 cm² and 4 cm² averaging area, in accordance with IEC PAS 63446:2022. These values may be compared with the APD limits defined by IEEE C95.1 (2019) and ICNIRP (2020) that have been adopted by several national regulators including Canada, Australia, Japan, and China.

On-The-Fly Uncertainty Calculation

The measurement uncertainty is calculated on the fly for each SAR measurement, resulting in a significant reduction in the 95% confidence interval for most measurements compared to generic evaluations. The measurement uncertainty accounts for all IEC 62209-3 components, and uses formulations from sensitivity analyses of these components.

Base Station Simulator Integration

DASY8 Module SAR inherently supports base-station simulators. The following base-station simulators are currently integrated:

Unlicensed:

• • Rohde & Schwarz CMW500
  • Anritsu MT8820C, MT8821C

Licensed:

• Anritsu MT8000A

Other simulators and EUT firmware interfaces are user-programmable via an advanced Python interface. Support for built-in automation with obsolete BSS models is not guaranteed and needs to be investigated case by case.

The base-station simulators are connected via ANT, and the selected linearization parameters are verified via MAIA.

Python Interface 

The built-in Python scripting interface gives you high-level control to:

• Create custom test configurations
• Control external equipment via GPIB (e.g., base station simulators)
• Conduct statistical postprocessing of the measurement data

Test scripts and customer support are provided by SPEAG. 

Application Programming Interface (API V2)

(licensed)

External control of cSAR3D is possible via the API. The API option allows programmers to control cSAR3D remotely, to start measurements, read out SAR results, and even perform advanced functions. The API Option uses HTTP POST requests with JSON arguments and responses. It is compatible with any operating system and programming language supporting HTTP requests.

The API option allows sites to use their own automated test software and analysis tools. It extends scalability to multi-site environments.

Automated Device Positioning

Additional DASY8^3D software module controls robot movements to pick up and position a wireless device on any cSAR3D phantom. Thousands of SAR measurements can be performed with just one click.

Visualization

Visualize the data and test configuration:

• Display all measurement results of a wireless device in a single visual
• Visualize the SAR pattern in slices or grid
• Include photo of DUT overlayed on SAR distribution
• Zoom in on specific measurements to view more detail
• Color-coded information shows the highest SAR test conditions at a glance

Report Generation

With the click of a button, SAR measurements can be saved in different formats to create SAR test reports:

• Generate 3D views of measurement data for use in SAR test reports
• Export tabular data of peak spatial-average SAR to Excel or Word

Computer Requirements

The following minimum PC requirements must be met to experience maximum performance and full graphical capability:

• Processor: Intel Core i9, Xeon (or AMD equivalent) (8 cores minimum, 10+ cores recommended)
• Operating system: Windows 10 or 11, 64-bit Operating System
• RAM: 32 GB minimum, 64 GB recommended
• Ports: 3 Ethernet, 4 USB (at least 2 USB 3.0)
• Hard drive: minimum 500 GB solid state drive (1 TB recommended)
• Hard drive (data): 1 TB SATA 3.5in drive (2 TB recommended)
• Graphics card: NVIDIA graphics card with at least 4 GB of memory and CUDA 10 support
• Screen: minimum 1920 × 1080 pixels resolution (2560 x 1440 recommended)

We offer a PC with the latest specifications, on request. The PC comes with cSAR3D software, licenses and calibration files pre-installed.