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.

Propagation delay mode Cut Back type
Stripline method
dielectric constant and dielectric loss tangent measurement system(Dk/Df)

Model No. DPS15

This system measures εr、and tanδof dielectric sheet and clayish specimens in the range of 500MHz - 40GHz.
In case of measuring powder-like specimens it is possible to measure by adding optional software tools to calculate permittivity and tanδ with the shade density and the true density of the powder specimens , temperature measurement equipment and temperature dependence calculation soft.
And it enables evaluation of the voltage dependence of εr tanδ by impressing Bias.

It consists of the Cut Back method using propagation lines and has merits below.
Improvement of accuracy and simplification of measuring by correcting reflective loss caused by a mismatching of Characteristic Impedance.
Continuously variable frequency (frequency sweep).

The test kit for the Cut Back is designed to achieve 50Ωwhen the kit pinches specimens.


Measurement frequensy 500MHz-40GHz
Dielectric constant (εr') 1.05-200   Accuracy ±5%
Dielectric loss tangent (tanδ) 0.001-5 Accuracy ±10%
Specimen size Sheet thickness 0.1-10mm

Model No.

Name Specifications Model No.
Test kit for Microstrip line Cut Back (2 sets) connector, calibration propagation lines, measurement propagation lines CBC-08-30 length 30mm
CBC-08-50 length 50mm
CBC-08-60 length 60mm
CBC-08-100 length 100mm
CBC-08-300 length 300mm
Coaxial cable 500mm (2 sets)   CM06D-APC2.9(m)APC2.9(m)-500mm (For 40GHz)
Microstripline type program for Cut Back (1 set)   DMP-15
Vector network analyzer When it is not possession, We will arrange.
Please inform us when there is a model for which you hope.
Windows PC and printer When it is not possession, We will arrange.  
GPIB cable    


Data sample (English version available)