DAK - Dielectric Assessment Kit Product Line  

What are DAK, DAKS and DAK-TL (NEW)?

The Dielectric Assessment Kit (DAK) product line offers high-precision dielectric parameter measurements (permittivity, permeability, conductivity, loss tangent) over the very broad frequency range from 10 MHz to 67 GHz for applications in the electronic, chemical, food, and medical industries. The product line consistes of 1) DAK single probes solutions, 2) DAK Systems, 3) DAK-TL-P the first ever system to measure thin layer materials and small volumes of liquides and 4) DAK-TL-P² that can not only determine the complex permittivity but also the permeability of thin-layer materials.

Watch a Brief Introduction to DAK!

What are the Unique Features of DAK Product Line?

DAK Single Probe Solutions

The very broad frequency range from 10 MHz to 67 GHz can be covered with only 3 single probes and without compromise on uncertainty. The probes are mounted on a mounting arm and connected via a high-quality cable to any VNA (see below). The main features of the probes are:

  • Manufuctured with maximum precision to minimize unwanted reflections.
  • Materials and shapes optimized to ensure excellent contact with the material under test; easy to clean to avoid cross contamination between probe and material; newly developed novel algorithms extend the frequency range of DAK probes down to 10 MHz (DAK-12) and up to 67 GHz (DAK-1.2E) with minimum uncertainty penalty.
  • Many innovations integrated into the shorting block for excellent system calibration, key for highly accurate and precise measurements.

The following four DAK single probe solutions are available:


DAK Systems

DAKS is based on the same probe technology as single probes but with integrated vector reflectometer that eliminates phase distortions due to cable movements, i.e., the probes can be moved to the object under test. In case of single probes, the probe with the cable must be stationary which complicates some measurements. Currently two DAKS are offered:

DAKS-12: 10 MHz – 3 GHz w/ integrated Vector Reflectometer (ShockLine MS46121A, Anritsu)

DAKS-3.5: 200 MHz – 14 GHz w/ integrated Vector Reflectometer (R140, Copper Mountain Technologies)

DAK-TL-P Systems

The DAK-TL-P systems are the first systems to measure the dielectric properties of thin material layers for a broad frequency rage with high precision. The system also allows to measure small quantities of liquids. The thickness range is <100um to 10mm. The system is fully automated and software controlled. Currently three DAK-TL-P system configurations are offered:

  • DAK12-TL-P: 10 MHz – 3 GHz i
  • DAK-3.5-TL-P: 200 MHz – 20 GHz
  • DAK-1.2E-TL-P: 5 – 67 GHz


The frequency range of the system can be easily extended by adding one or two probe beams.

DAK-TL-P² System

The DAK-TL-P² system is the first system ever to measure the dielectric and magnetic properties of thin material layers for a broad frequency rage (200 MHz - 20 GHz) with high precision. The thickness range is <100um to 10mm. The system is fully automated and software controlled. Currently one system configuration is offered

  • DAK3.5-TL-P²: 200 MHz – 20 GHz 



  • intuitive user-friendly DAK interface provides a wide range of graphical and numerical analyses.
  • advanced algorithms developed by the IT'IS Foundation for fast, high-precision measurements; choice of complex permittivity parameters (ε', ε", σ, tanδ) plotted in a variety of data formats: linear, logarithmic, Smith charts, Cole-Cole plot, and tabular.
  • robust data analysis suite enables data to be fit to analytical curves, compared with target parameters, with  tolerance and uncertainty ranges.

Wide Range of Dielectric Parameters

Precise measurements over a broad range of dielectric parameters:

  • εr: 1 – 200
  • tanδ min.: below 10−5
  • tanδ max.: greater than 10
  • μr': 1 – 100*
  • μr'': 0 – 100*

Download Product Flyer (PDF, 1.0 MB)

*preliminary specifications

Automation Built-in Python interface for powerful extended control of equipment and data analysis; several formats for data import and export; data export for use with DASY6 and SEMCAD X.

DAK interfaces with the most popular vector network analyzers on the market; ever expanding list of compatible VNAs. 

Calibration according to SPEAG's high-quality standards; DAK probe calibration included within the scope of SPEAG's ISO/IEC 17025 accreditation; suitable for measurements with small and known tolerances.
The DAK Verification Kit provides a quick and easy tool to verify the measurements made by the Dielectric Assessment Kit.

High level support directly available from the research & development and advanced application teams in Zurich.

Daily support available directly from from the nearest SPEAG representative.

Custom-Made Features & Solutions

Upon request

Our DAK options are the most cost-effective solutions on the market. To receive a quotation or to learn more, please contact your nearest SPEAG representative or write to us at info@speag.com.


Data visualization in various formats: Smith chart, linear charts, and difference chart.


created and designed by R.Ø.S.A.