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.

Electromagnetic Wave Absorption Rate Measurement System
(in near-field / in far-field)

Model No. eas

Software

Single layer type / Multi layer type : Electric wave absorber , Return loss, Simulation soft
eas01002010910-0
EAS01 optimizes two variables voluntarily selected among εr', εr'', μr', μr'', thickness of sample and the frequency.
The distributions of the return loss values are represented in contour as shown below.
It will allow you to obtain the most optimized εr, μr, or sample thickness by repeating the process several times on various combinations.
* Return loss calculation in various combinations of εr', εr'', μr', μr'', sample thickness and the frequencies
* Visualization and partial magnification
* GUI and data exportable to Excel
* Runs on Windows

For far-field, Electric wave absorber (material), return loss measurement system

Diagonal incidence type

Lens Antenna Method, Diagonal incidence type electric wave absorber (material), return loss measurement system
(for 2.6-26.5GHz)
eas03002010704-01

EAS03 is an ideal solution for evaluations of the electric wave absorbers and shield materials. 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. Samples can be smaller than before because they can be placed in the vicinity of the antennas. It is also suitable for ITS/ETS applications. It also supports a vertical incidence when using a vector network analyzer. Transportable type is available for heavy or immovable objects such as concrete wall or asphalt road.

Reasons for high accuracy:
*Its plane wave is in phase with sample face.
*Its parallel beam prevents interferences of unnecessary electric wave.
* An anechoic chamber is not required.
*Wide dynamic range, more than 50dB with gating and 40dB without.

 
Lens Antenna Method, Diagonal incidence type for millimeter wave, desk top model electric wave absorber (material), return loss measurement system (for 26.5-110GHz)
eas0500201609-05

EAS05 is a millimeter solution for evaluations of the electric wave absorbers and shield materials. 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. Samples can be smaller than before because they can be placed in the vicinity of the antennas. It also supports a vertical incidence when using a vector network analyzer.

Sample applications: ITS, 60GHz wireless LAN, Collision-avoidance system for automobiles, etc

Vertical incidence type

Lens Antenna Method, Vertical incidence type electric wave absorber (material), return loss measurement system
eas07002981027-10
EAS07 is a vertical measurement system for evaluations of the electric wave absorbers and shield materials. 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. Samples can be smaller than before because they can be placed in the vicinity of the antennas.
 
Handy type Lens Antenna Method Vertical incidence type, electric wave absorber (material), return loss measurement system
eas12002041115-12
EAS12 is a portable version of the “Lens Antenna Method, Vertical Incidence Type
Electric Wave Absorber, Return Loss Measurement System: EAS07”
, that allows you to perform your measurement in the field.
Its movable antennas easily detect the influences caused by the seams in the electric wave absorbers.  
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. Samples can be smaller than before because they can be placed in the vicinity of the antennas.

For low frequency

For low frequency, micro strip line method electric wave absorber (material), return loss measurement system
eas08002020721-05
EAS08 measures the return loss measurement of the electric wave absorber in the MHz range with relatively a small sample for a MHz range measurement device.

For near-field,
Noise suppression sheet characteristics, evaluation system (electric wave absorption material measurement system)

For near-field noise suppression sheet evaluation system
Intra / inter• decoupling ratio measurement system (Rda•Rde measurement system)
IEC standard No.:IEC62333-1, IEC62333-2
nss02
Regarding the evaluation method of the noise suppression seat, Japanese team suggested standardizations to IEC in 2003, and it was enacted in May, 2006.  ("KEYCOM" participated as a committee member)
"KEYCOM" has commercialized the measurement kit based on this evaluation method.
It is for the evaluation of electric wave absorption materials to use for prevention of oscillation and an anti-EMI measure of a mobile telephone.
The electromagnetic wave is disorderd in the narrow cases, and an electric field and a magnetic field become independent.
As for the electric wave absorption material in such a situation, the electric wave absorption rate in the near field should be large.
It is unnecessary to disarrange the impedance of the circuit.
 
For near-field Noise suppression sheet evaluation system
Transmission attenuation power ratio measurement system (Rtp measurement system)
IEC standard No. : IEC62333-1, IEC62333-2
nss03
Regarding the evaluation method of the noise suppression seat, Japanese team suggested standardizations to IEC in 2003, and it was enacted in May, 2006.  ("KEYCOM" participated as a committee member)
"KEYCOM" has commercialized the measurement kit based on this evaluation method.
It is for the evaluation of electric wave absorption materials to use for prevention of oscillation and an anti-EMI measure of a mobile telephone.
The electromagnetic wave is disorderd in the narrow cases, and an electric field and a magnetic field become independent.
As for the electric wave absorption material in such a situation, the electric wave absorption rate in the near field should be large.
It is unnecessary to disarrange the impedance of the circuit.
 
For near-field Noise suppression sheet evaluation system
For anechoic chamber
Radiation Suppression ratio measurement system (Rrs measurement system)
IEC standard No. : IEC62333-1, IEC62333-2
nss04
Regarding the evaluation method of the noise suppression seat, Japanese team suggested standardizations to IEC in 2003, and it was enacted in May, 2006.  ("KEYCOM" participated as a committee member)
"KEYCOM" has commercialized the measurement kit based on this evaluation method.
It is for the evaluation of electric wave absorption materials to use for prevention of oscillation and an anti-EMI measure of a mobile telephone.
The electromagnetic wave is disorderd in the narrow cases, and an electric field and a magnetic field become independent.
As for the electric wave absorption material in such a situation, the electric wave absorption rate in the near field should be large.
It is unnecessary to disarrange the impedance of the circuit.
 
Noise suppression sheet characteristics evaluation system (For near-field, Electric wave absorption material measurement system)
Anechoic chamber is not required,
Radiation suppression ratio measurement system (Rrs measurement system)
IEC standard No. : IEC62333-1, IEC62333-2
nss05

NSS05 is a compact(1200mm x 600mm x 600mm) noise suppression characteristics evaluation system that requires no anechoic chamber.
・Measurement compliant with 3m-method and 10m-method are performable without anechoic chamber (0.5~26.5GHz).
・ Easy exchangeability of samples
・ Low attenuation, only a network analyzer is needed.
The electric wave radiated from the sample, converted to plane wave through the dielectric lens, enables your measurement to take place in short distance, therefore attenuation stays low, eliminating the necessity of additional amplifier. It also minimizes the interferences of unnecessary electric wave and thus eliminates the necessity of anechoic chamber.
It also allows you to observe the source of unnecessary electric wave radiating from the sample in
far-field by moving the sample on the XY stage.