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 Strip Line Type
Dielectric Constant and Dielectric Loss Tangent(Dk/Df)
Measurement System for Sheet
[Films, Sheet, Dk, Df, εr', tanδ]

Model No. DPS50
Capable of measuring εr / tanδ of a thickness direction ! Suitable for measurering circuit materials !!

DPS50 is a resonance method, strip line type dielectric constant and dielectric loss tangent measurement system optimized for sheet materials with dielectric constant of approximately 1 to 40 and relatively small dielectric loss in the frequency range of 800 MHz to 14GHz. This system is compliant with the ASTMD3380 standard method of test for permittivity (dielectric constant) and dissipation factor of plastic-based Microwave circuit substrates, and IPC-TM-650 2. 5. 5. 5. 1 strip line test for complex relative permittivity of circuit board materials to 14GHz. This measurement technique was announced at 2008 IEEE IշMTC.
IEEE 2008 IշMTC Victoria Canada, paper#1569085274,Tue_20 12-15 May 2008

For Adjustment
For Measurement


Place a sample on 2 different PCB resonators and overlay the metal lid on each to apply pressure, and take measurements twice.
This method will

  1. eliminate the fringing effect
  2. eliminate conductor loss of resonator
  3. eliminate the necessity for creating resonance pattern
  4. generate an electric field perpendicular to the sample sheet


Frequency 800MHz~14GHz
Resonance frequency - without sample. When you put a sample on the jig, the resonance frequency will become lower.
Dielectric Constant (εr') 1.05-40 Accuracy ± 5%
Dielectric loss tangent (tanδ) 0.001-0.05 Accuracy ± 10%
Sapmle size

*Size of specimen
30mm x 150mm (900MHz)
30mm x 30mm (15GHz)
*Sheet thickness

Order information : Model No.

Model no. Description Frequency Range Sample size
FS-03 Pressure type fixture ( w/ pressure sensor for constant load, digital indicator)    
R-0.9B Resonator (measurement+calibration+fixture)
*Supprots up to 14GHz
*Resonance frequency without sample. Resonance frequency is lower with sample
900MHz 30mm×150mm
R-1B 1GHz 30mm×150mm
R-2B 2GHz 30mm×80mm
R-5B 5GHz 30mm×30mm
R-10B 10GHz 30mm×30mm
R-15B 15GHz 30mm×30mm
DMP-61M Software, resonance method strip line type for Windows
(Complex dielectric conversion software)
2 pieces required
Coaxial cable    
VNA Vector network analyzer When you have a request, we will propose a suitable model.
CP Windows PC (w/ printer) Available upon your request.
GP-01 GPIB interface    



Test example (English version available)