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.

Angle of Incidence Change Method
Dielectoric Constant, Dielectric Loss Tangent, Permeability(Dk/Df)
Measurement System

Model No. DPS22

This system measures return loss and dependency of reflection phase angle on the incidence angle of TE and TM wave, and inversely calculates complex relative permittivety and complex permeability.
Unlike coaxial or waveguide type, errors by air gap do not occur because the sample is not capsulated in the fixture. Despite its compact dimensions, your sample can be measured with plane wave because the lenses are attached to the antennas, providing high measurement accuracy. Because the electromagnetic wave transmitted from the antenna is a parallel beam, your sample can be smaller than conventional systems.
εr' and μr at required frequencies are measurable.
No anechoic chamber is required.


Measurement frequency 2.6-26.5GHz Sample size: larger than 450 × 1000mm, less than 50mm thick
26.5-110GHz Sample size: larger than 100 × 1000mm, less than 50mm thick
εr' μr' 2-200 accuracy ± 7%  
εr'' μr'' 0.01-20 accuracy ± 15%  
tanδ 0.01-0.1 accuracy ± 15%  
The angle of incidence
minimum : ∠15 maximum : ∠80  

Model No.

Name Specifications Model No.
Main Body
(Lens, Lens fixed frame, Antennna fixed frame and stand, Metallic board for calibration)
Main Body Size : Height 2100mm, Weight 250kg
Range of frequency : 2.6-26.5GHz
Main Body Size : Height 400mm, Weight 15kg
Range of frequency : 26.5-110GHz
(with coaxial waveguide converter)
2 set
Range of frequency :18-26.5GHz (WR-42) RH42S23SMA(f)7
Range of frequency :12.4-18GHz (WR-62) RH62S22SMA(f)7
Range of frequency :8.2-12.4GHz (WR-90) RH90S19SMA(f)7
Range of frequency :5.85-8.2GHz (WR-137) RH137S18SMA(f)7
Range of frequency :4.90-7.05GHz (WR-159) RH159S17SMA(f)7
Range of frequency :3.95-5.85GHz (WR-187) RH187S16SMA(f)7
Range of frequency :2.60-3.95GHz (WR-284) RH284S14SMA(f)7
Range of frequency :1.70-2.60GHz (WR-430) RH430S14SMA(f)7
Calibration and graphing software   DMP-002040619
GPIB interface   GP-01
Network analyzer Available upon request .
Please request the model of your choice.
Windows PC (with printer)  
*The higher the measurement frequency is, the smaller the size of your sample can be.
*By applying a gate beyond the lenses closer to the sample after calibration, it allows you to measure electromagnetic absorption rate above –50dB with a standard vector network analyzer.

Data example