KEYCOM provides solutions in the 300 GHz to 1 μHz frequency range (SHF/EHF/MW/UHF/VHF/ULF).
We undertake designing, manufacturing and measuring. Please feel free to contact us.

Probe Method(Open Mode)
Dielectric Constant and Dielectric Loss Tangent　
(εr'/tanδ)
Measurement System

Model No. DPS16
Fit for liquids, Rubbery solid materials! Probe method is comparative method, but measurement in wide range(100MHz(10MHz)-55GHz) is available!!

Rubbery solid, liquids, and powders can be used as samples.

Since standard samples other than pure water (ethanol, methanol, acetone) can be used, relatively low dielectric constant and low loss materials can also be measured.

Probes with outer diameters of 1.2 mmφ, 2.2 mmφ, 3.6 mmφ, and 6.6 mmφ are available for a variety of measurements.

Specifications

Frequency 100MHz-55GHz
(10MHz-100MHz: the accuracy is not guaranteed. *1)
εr'

measurement range : 1.05-500 *1 )
Precision(repeatability) : ±1%(depend on network analyzer's performance)
Precision + accuracy(to true value)(based on the measurement of methanol with reference sample - ethanol and calculated by theoretical value) : ±4% or ±0.01(depend on measurement theory and design of positioning tool/ave. of 200MHz-10GHz)
tanδ

0.001-10 (1 x 10-3 - 10) *1 )
Ref.) when written [10-5 ], then it means measurement of 3 x 10-5 of Liquid Helium is available. It's difficult to measure Liquid Helium by resonator method and probe method is a comparative method, so it is almost impossible to measure Luquid Helium by probe method. If high accurate measurement like Liquid Helium is required, please refer to *1 ) .
Precision : ±2%(depend on network analyzer's performance)
Precision + accuracy(to true value)(based on the measurement of methanol with reference sample - ethanol and calculated by theoretical value) : ±8% or ±0.01(depend on measurement theory and design of positioning tool/ave. of 200MHz-10GHz)

Sample size Gummy solid: 10mm (W) × 10mm (L) × 1mm (H) min.
Liquid: 20ml min.


*1) Probe method is a comparative method. If high accuracy is required, please refer to below.
(Especially, at 100MHz or less, the phase information is easily hidden in the slightest movement of the cable etc. .)
20Hz-1MHz: Capacitance Method εr' [1.05-1000] accuracy ±3%, tanδ[0.0003-10] accuracy ±5%
10MHz; LC resonance method εr' [1.05-30] accuracy ±5%, tanδ[0.0002-0.05] accuracy ±10%
200MHz, 1GHz; Perturbation Method High accuracy : εr' [1-150] accuracy ±1%, tanδ[0.0001-0.05] accuracy ±3%
100GHz; Open Resonator Method εr' [1.05~30] accuracy ±3%, tanδ[0.0001~0.05] accuracy ±7%

Ordering information

Please let us know details about Model number etc., or your request for measurement

Model number Name Description

dps16

 Open Mode Probe Method
Dielectric Constant and Dielectric Loss Tangent
Measurement System(Dk/Df) 		a set name of this system
POS-047D Probe
 10GHz~55GHz measurement jig
POS-250D Probe 10MHz~5GHz measurement jig
POS-085D Probe 1GHz~15GHz measurement jig
POS-141D Probe 100MHz~3GHz measurement jig
CM06A-SMA(m)SMA(m)-500 Cable assembly Coaxial cable(~18GHz) with connector
CM06D-APC2.9(m)APC2.9(m)-500 Cable assembly Coaxial cable(~40GHz) with connector
DMP-60 Programm software Open mode probe method measurement software
Vector Network Analyzer Available with each company's VNA.
If you don't have VNA, we can estimate recomendable model. Please contact us.
CP Windows PC(including software installation)  
GP-01 GPIB cable
  

Configuration

Data example (English version available)

Pure water (Micro Wave)

Pure water (Millimeter Wave)

 

 

Data example 　-Methanol (Reference sample: Pure water) -

  100MHz 1GHz 10GHz 30GHz 50GHz
Dk　Theoretical value 33.757 30.569 7.692 5.917 5.765
Dk　Measured value 34.577 31.672 7.973 6.072 6.015
Df　Theoretical value 0.02994 0.29310 0.94262 0.43626 0.27015
Df　Measured value 0.02457 0.27538 0.92166 0.42024 0.24515
Jig POS-141D POS-141D POS-085D POS-047D POS-047D

Customer

Tokyo University, National Defense Academy, National Institute of Advanced Industrial Science and Technology, Hokkaido University, Tokyo Institute of Technology, Tokyo University of Marine Science and Technology, University of Electro-Communications, Kanazawa Institute of Technology, Oita National College of Technology, Fukui National College of Technology, Sendai National College of Technology, etc.