DAK-3.5 (200 MHz – 20 GHz)

DAK-3.5 (200 MHz – 20 GHz)

Fast & Precise Dielectric Measurements


Download Product Flyer (PDF, 1.0 MB), DAK Intro Video

This precision dielectric measurement system is designed to cover the 200 MHz – 20 GHz frequency range with a single open-ended coaxial dielectric probe. The system uses advanced algorithms and novel hardware to measure the dielectric properties of liquids, solids, and semi-solids over a broad range of parameters. The measurement method is fast and non-destructive to the material under test.

  • Characterization of materials for the electronics, chemical, food, and medical industries, including human tissues.
  • Evaluation of reference liquids over a broad frequency range for specific absorption rate (SAR) measurements, in accordance with IEC 62209, IEEE 1528, and several federal regulations.
  • Measurement of complex permittivity of solid phantoms for CTIA Test Plan for OTA performance.


1 DAK-3.5 Dielectric Probe
1 DAK-3.5/1.2 Short 
2 DAK-3.5/1.2 MSS
1 high-precision cable (PC3.5 F connectors, 1 m long)
1 thermometer 
1 DAK verification kit
1 probe stand
1 DAK manual
1 DAK software and license

Probe Description

Connector Type: 3.5 mm male
Outer Conductor Inside Diameter: 3.5 mm
Inner Conductor Diameter: 0.93 mm
Flange Diameter: 18 mm
Dielectric Bead Material: Eccostock
Flange: Stainless steel
Immersible Length: 50 mm
Robustness: High resistance to corrosive materials
Operating Temperature Range: 0 - 60 °C


Many advanced features

VNA Compatibility

Compatible with the most popular vector network analyzers (VNA) on the market; please see our list of currently supported VNAs; ask about our attractive system packages with the VNA from Rohde & Schwarz.

Upgrade Options

Extending the lower frequency to 10 MHz:
1 DAK-12 Dielectric Probe
1 DAK-12 Short
2 DAK-12 MSS 

Extending the upper frequency to 50/67 GHz:
1 DAK-1.2/1.2E Dielectric Probe
2 DAK-3.5/1.2 MSS
1 high-precision cable (PC2.4 or 1.85 F connectors, 0.5/0.4 m long)


Please ask for a quotation from your nearest SPEAG representative or contact us at