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.

Open Mode Probe Method 
Dielectric Constant and Dielectric Loss Tangent 
Measurement System(Dk/Df)

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

- Wide frequency range, 100MHz up to 55GHz.
- Ideal for gummy solid, liquid, and powder samples.
- Reference samples other than pure water are applicable (ex. acetone, PTFE, ALUMINA)
- KEYCOM offers probes with different outside diameters of 1.2mmφ, 2.2mmφ, 3.6mmφ and 6mmφ to meet your specific measurement requirements.

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: 1mm (W) × 1mm (L) × 0.5mm (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%

Order information : Please let us know Model number and Option Parts number

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)

Example:Pure water (Micrometer wave) Example: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