DAK - Dielectric Assessment Kit Product Line  

What are DAK, DAKS, and DAK-TL?

The Dielectric Assessment Kit (DAK) product line offers high-precision dielectric parameter measurements (permittivityconductivity, loss tangent) over the very broad frequency range from 4 MHz to 67 GHz for applications in the electronic, chemical, food, and medical industries. The product line consists of 1) DAK single probes solutions, 2) DAK Systems, and 3) DAK-TL the first system ever able to measure thin-layer materials and small volumes of liquids.

Watch a Brief Introduction to DAK: Dielectric Measurements Made Easy!


What are the Unique Features of DAK Product Line?

DAK-12, DAK-3.5, DAK-1.2E: Single Probe Solutions for Bulk Materials

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

    • probes are manufactured with maximum precision to minimize unwanted reflections
    • probe materials and shapes are optimized to ensure excellent contact with the material under test
    • probes are 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 minimal uncertainty
    • many innovations are integrated into the shorting block for excellent system calibration, which is key for highly accurate and precise measurements


The following four DAK single probe solutions are available:


DAKS: Simplest Way to Measure Bulk Materials

DAKS is based on the same probe technology as the single probe DAK versions but with the vector reflectometer integrated to eliminates phase distortions due to cable movements, i.e., the probes are moved to the object under test; with a single probe, the probe and cable must remain stationary, which can complicate certain measurements.

Currently, two versions of DAKS are offered:

DAKS-12: 4 MHz – 3 GHz, with integrated vector reflectometer model R60 from Copper Mountain Technologies or ShockLine MS46121B from Anritsu

DAKS-3.5: 200 MHz – 14 GHz with integrated vector reflectometer model R140 from Copper Mountain Technologies

DAK-TL: Dielectric Measurements of Layers and Small Volumes

The DAK-TL systems are the first commercially available systems able to measure with high precision the dielectric properties of thin material layers – thickness range from <100 µm to 10 mm – over a broad frequency range. The system also allows small quantities of liquids to be measured. The system is fully automated and software controlled. Currently, three DAK-TL system configurations are offered:

  • DAK12-TL: 4 MHz – 600 MHz 
  • DAK-3.5-TL: 200 MHz – 20 GHz
  • DAK-1.2E-TL: 5 – 67 GHz

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

Easy-to-Use The DAK interface is:
  • 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, tan δ) reported in a variety of data formats: linear plots, logarithmic plots, Smith charts, Cole-Cole plots, and tabular 
  • robust data analysis suite enables data to be fit to analytical curves and 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
  • tan δ: 0.02/εr – >10 
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 and 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


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