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.

Resonance method micro strip line type
for sheet and ultra thin sheet
dielectric constant and dielectric loss tangent measurement system(Dk/Df)

Model No. DPS01

This is a test system for dielectric constant and dielectric loss tangent where the material dielectric loss is relatively small in the vicinity of 1 to 20 in the frequency range of 800 MHz to 14GHz.
We follow the ASTMD3380-75 Standard method of Test for Permittivity (Dielectric Constant) and Dissipation Factor of Plastic-Based Microwave Circuit Substrates and IPC-L-125 Specification for Plastic Substrates, Clad or Unclad, for High Speed / High Frequency Interconnections.

・H.Suzuki,  "Microwave measurment of complex permittivity of thick plate by placing the material under test on a microstripline resonator " Eu Mc 21-4, 2006, Manchester, uk


Frequency 800MHz~14GHz
Dielectric Constant (εr') 1.05-20 Accuracy ±7%
Dielectric loss tangent (tanδ) 0.001-0.05
Sheet thickness 10μm~0.5mm, 0.5~50mm

Model No.

Name Specifications Model No. Sample Dimension
Fixture Base Board 250mm (Length) × 130mm (width) × 50mm (Height) FS-01  
Resonator Frequency Range 900MHz  R-0.9A 50×150mm
Frequency Range 2GHz  R-2A 30×80mm
Frequency Range 5GHz R-5A 10×30mm
Frequency Range 10GHz R-10A 10×20mm
Resonance Program
(Composite dielectric material translation software, εr, and tanδ calculation software)
Vector Network Analyzer Available upon request .
Please request the model of your choice.
Coaxial cable for measurement   CM06D-APC2.9(m)APC2.9(m)-500 : 2set
Personal computer with Window, Printer      
GPIB Cables (0.5m) 2set   GP-01  

Maximum 14 GHz can be achieved
*Resonance frequency is without sample. When sample is laid Resonance frequency becomes lower.
*Calibration Resonator comes as a set with the testing resonator.



Test example (English version available)