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.

Circular Disk Resonator Type
Dielectric Constant and Dielectric Loss Tangent(Dk/Df)
Measurement System

Model No. DPS51

The system is for measureing the relative permittivity and dielectric loss tangent in the thickness direction of a sheet material with relatively small dielectric loss whose relative permittivity is approximately 1.05 to 10 at frequencies from 3 GHz to 70 GHz.

This measurement method was presented at IEEE IMS in 2012.

However, we have not sold any and currently do not recommend this method.

  1. Inaccuracy of dielectric loss tangent is caused by physical factors and cannot be solved.
  2. Anisotropy is undesirable in high-frequency substrates, there is no need for it in the first place.
The recommended method is as follows.

Of course, we can recommend a suitable system upon your measurement requirements.
Please feel free to contact us!

Recommended Measurement Method

Resonance Method, Strip Line Type [DPS50]

Capable of measuring dielectric constant and dielectric loss tangent in the thickness direction from 1GHz to 14GHz. It is used by major manufacturers for production lines and R&D applications.

Open Resonator Method [DPS03]

It is possible to perform measurement of planar dielectric constant and dielectric loss tangent from 18 GHz to 140 GHz - 5G applications, film.

Frequency Change Method [DPS10]

Planar dielectric constant and dielectric loss tangent measurements from 18 GHz to 140 GHz - for automotive radar applications, radome measurements, and resin plate measurements - are possible.

Features

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

Specifications

Frequency 3GHz~70GHz
Dielectric Constant (εr') 1.05-10　Accuracy ±2%
Dielectric loss tangent (tanδ) 0.001-0.05　Accuracy ±4%
Sheet thickness 50μm~2mm

Model No.

Name Model no. Frequency range Sample size
Pressure type fixture ( w/ pressure sensor for constant load, digital indicator) FS-03    
Resonator ( measurement+calibration+fixture)
*Supprots up to 14GHz
*Resonance frequency without sample. Resonance frequency is lower with sample		 RR3A 3GHz - 10GHz 70mm×70mm
RR10A 10GHz - 30GHz 50mm×50mm
RR30A 30GHz - 70GHz 40mm×40mm
Software, circular disk type for Windows
(Complex dielectric conversion software)		 DMP-70A    
Coaxial cable EF085G-V(m)V(m)-300mm x 2    
GPIB interface GP-01    
Vector network analyzer Available upon request    
Windows　PC (w/ printer) Available upon request    

 

Configurations

Test example (English version available)