Module mmWave

DASY8 Module mmWave

DASY8 mmWave detail web

DASY8 Module mmWave is SPEAG's solution for power density (PD) compliance testing of transmitters operating in the mmWave frequency range. The solution is based on the novel pseudo vector EUmmWVx probe, which measures electric (E-) fields at distances as small as 2 mm from any transmitter.

The mmWave module includes advanced scanning and post-processing algorithms for quick PD evaluation for 5G beamforming and MIMO antenna configurations on any surface, such as those of the SAM phantom. The measurement system is compatible with all international standards and the measurement results from this system are widely accepted by industry, regulators, and academia alike.


DASY8 Module mmWave includes the novel EUmmWVx probe mounted on a precision TX2 robot arm. The robot system allows scanning with a spatial precision of 0.2 mm

The EUmmWVx probe is designed for precise near-field measurements in the mm-wave range. The hardware additionally includes a range of verification sources for an easy and accurate system check as well as a special phantom and device-under-test (DUT) holders for avoiding field distortion.

The module software includes advanced algorithms for precise reconstruction of E-fields and magnetic (H-) fields and the computation of surface averaged PD. Additional options extend software capability to estimate field quantities on curved surfaces and also for MIMO / phased array systems.

An optional advanced application programming interface (API) enables users to develop customized testing strategies.
  • Incident PD exposure compliance testing of transmitters at frequencies 6 – 110 GHz
  • Testing / evaluation of mmWave antenna systems during the design phase
Basic Components 

The basic components of DASY8 Module mmWave are:


EUmmWVx – Designed for precise near-field measurements in the mm-wave range. The specifications are:

  • Frequency range: 0.75 – 110 GHz
  • Dynamic range: <20 V/m – 10'000 V/m with PRE-10 (min <20 V/m – 2000 V/m)
  • Linearity: <±0.2 dB
  • Supports sensor model calibration (SMC)
  • ISO 17025 accredited calibration

mmWave Phantom – Approximates free-space conditions, allowing to evaluate not only the antenna side of the device but also the front (screen) side or any opposite-radiating side of wireless devices operating above 10 GHz without distorting the radio frequency (RF) field.

It consists of a 40 mm thick Rohacell plate used as a testbed, which has a loss tangent (tan δ) ≤0.05 and a relative permittivity (ɛr) ≤1.2. The high-performance RF absorbers are placed below the foam.

Mounting Devices

mmWave DUT Holder – Ensures accurate positioning of smartphones, tablets, and laptops

System Check / Verification

A series of well-characterized verification sources  are available so that the user can perform the required system check easily and accurately before evaluating the DUT. Verification sources are available from 10 GHz up to 90 GHz. The sources are stable and are precisely calibrated for optimum performance. The sources above 30 GHz include a built-in Gunn Oscillator packaged along with the horn antenna inside a cube-shaped housing, thus eliminating the need for a signal generator and power measurement setup for these frequencies.

The exhaustive list of verification sources is given below:

  • Patch 6.5 GHz (P6500)
  • Verification Source 10 GHz
  • Verification Source 30 GHz
  • Verification Source 45 GHz
  • Verification Source 60 GHz
  • Verification Source 90 GHz


System Validation Sources

Two calibrated system validation sources are available:

  • Cavity-fed Dipole Array
  • Pyramidal horn loaded with a slot array

Each source is calibrated prior to shipment at SPEAG’s ISO/IEC 17025 accredited laboratory and allows in-depth performance evaluation at the customer site if required by regulators.


DASY8 Module mmWave offers the following features:

  • Novel algorithms for reconstruction of amplitude and phase of the E/H-fields and the real part of the power density (S) from measurements of the E-field polarization ellipses on two planes
  • Measurement distances as small as 2 mm from the surface of the DUT
  • Optimal measurement grid generation based on the frequency, modulation, evaluation distance, spatial location, and extent of the transmitter array to minimize the total evaluation time
  • Optimized workflow with minimal user interaction and automated report generation
  • 5G Scans for evaluation and visualization of field magnitude, vector field, and surface averaged PD values with standard (1cm/ 4cm2 ) and user-defined averaging areas.
  • Fast Area Scans to provide the E-field distribution over whole EUT surfaces within a few minutes only
  • Generic Scans to evaluate propagation in the far-field
  • Time Averaged Scan for evaluation of devices that monitor the output power over time
API (licensed)

The API Option enables the further automation of mmWave compliance measurement workflows via HTTP commands.

Typical use cases are:

  • Automation of test reduction procedures (i.e., decision whether the next measurement will be performed dynamically)
  • Integration of third-party tools such as BSS, test software, DUT positioner, etc.

The API is compatible with any programming language supporting HTTP requests. It is available as a licensed option.

Software Options

The FTE (Forward Transformation Evaluation) option enables power density assessment on the SAM heads or any other virtual surface from a single planar measurement. It cuts down compliance costs for mm-wave devices operating near the head as the PD can be evaluated for all four test positions at the same head (Left / Right, Cheek / Tilt), and for various test distances at the Flat phantom, from one single planar measurement at 2 mm from the device.

The MEO (Maximum Exposure Optimizer) option computes the maximum PD for complex devices with phased-array antennas from a very limited set of measurements. The MEO Option smoothly complements the FTE Option as the worst-case configuration can be determined on any virtual surface using forward transform projections.

Applying both options in combination saves laboratory weeks of test time.


The EUMMWVx probe and the verification / validation sources require periodic calibration. These are carried out at SPEAG's state of the art ISO/IEC 17025 accredited calibration laboratory in Zurich.


DASY8 Module mmWave has been extensively validated with different validation sources in accordance with the requirements of the IEC/IEEE 63195 standard. Validation reports are available on request

Standard Compatibility

DASY8 Module mmWave is compatible with:

  • IEC/IEEE 63195
  • FCC Requirements
Unique Features




Forward Transformation

Worst Case PD Optimizer

Multi TX Evaluator

Demonstration of compliance through measurements as close as 2 mm from the device

Wideband system covering 10 – 110 GHz with a single probe

Options to evaluate surface averaged PD on any surface (flat or curved) from a single measurement on the flat surface

Options to evaluate worst-case PD for phased array and MIMO systems

Combined evaluation of SAR and PD for 5G devices








Several components (platform, robot, controller, measurement server, DAE, EOC, computer, etc.) are common to all DASY8 modules, thereby reducing the total cost of ownership

Any other modules (SAR, HAC, R&D, etc.) can be added as and when required

Approved by all national regulators (FCC, ISED, etc.), with more than 50 systems worldwide

Regular releases to adapt to changes in test standards as well as industry needs


cDASY6: Full file compatibility

Product History

See product lifetime

Release Date

February 18th, 2021

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