Electromagnetic wave absorption rate measurement system
(in near-field / in far-field)

Catalog No. eas

Software

Single layer type / Multi layer type : Electric wave absorber , Return loss, Simulation soft

eas01002010910-0

Two variables are to optimize among εr', εr'', μr', μr'', thickness of specimen and the frequencies.
The distribution of the amount of the return loss is shown, as the line of the figure below.
You will find most suitable εr, μr, specimen thickness repeating several times various combinations.

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

It is suitable for the evaluations of the electric wave absorption material and the shield material, etc.
The error by the airgap doesn't occur, because the measurement system doesn't put the sample in Ficcha, unlike the coaxial tube type or waveguide type.
The antenna can be mounted on the lens, compact even though the plane wave samples can be measured.
The sample can be smaller, because we can set a sample close to the antenna.
It is deployed in ITS, ETS systems.
It can measure a vertical angle of incidence. (If you have the vector network analyzer).
There is a transportable type, it can measure the heavy and not moved electric wave absorber, like concrete wall or asphalt road.
Reason with high accuracy
• It is a plane wave, and there is a phase on the specimen side.
• As it is parallel beam, an unnecessary electric wave is not incident on a lens.
• Anechoic chamber is not required.
• The dynamic range is wide,it is more than 50dB in case of multiplied by gating, and it is more than 40dB without gating.

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

It is for evaluation of the electric wave absorption material.
The error by the airgap doesn't occur, because the measurement system doesn't put the sample in Ficcha, unlike the coaxial tube type or waveguide type.
The antenna can be mounted on the lens, compact even though the plane wave samples can be measured.
The sample can be smaller, because we can set a sample closed to the antenna.
It is deployed in ITS, ETS systems.
It can measure a vertical angle of incidence. (If you have the vector network analyzer).
use : ITS, 60GHz wireless LAN, The collision-avoidance system of the car, etc

Vertical incidence type

Lens Antenna Method, Vertical incidence type electric wave absorber (material), return loss measurement system

eas07002981027-10

The error by the airgap doesn't occur, because the measurement system doesn't put the sample in Ficcha, unlike the coaxial tube type or waveguide type.
The antenna can be mounted on the lens, compact even though the plane wave samples can be measured.
The sample can be smaller, because we can set a sample closed to the antenna.

Handy type Lens Antenna Method Vertical incidence type, electric wave absorber (material), return loss measurement system

eas12002041115-12

It is a portable type, about the "Lens Antenna Method, Vertical incidence type electric wave absorber (material), return loss measurement system".
After the electric wave absorber is installed, the amount of the reflection can be measured.
It can be detected influence such as the joints because you can move an antenna easily.
The error by the airgap doesn't occur, because the measurement system doesn't put the sample in Ficcha, unlike the coaxial tube type or waveguide type.
The antenna can be mounted on the lens, compact even though the plane wave samples can be measured.
The sample can be smaller, because we can set a sample closed to the antenna.

For low frequency

For low frequency, micro strip line method electric wave absorber (material), return loss measurement system

eas08002020721-05

The amount of the reflection attenuation of the electric wave absorber for the MHz belt can be measured with a small sample.

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

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

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

It can be measured without anechoic chamber.
It is compact size at 1.2m height, 60cm width, 60cm length.
* Feature
• The measurement based on 3m-method and 10m-method is possible without anechoic chamber (0.5~26.5GHz).
• The specimen exchange is easy because the system is vertical.
• Attenuation can be a little, and it measure it only with the network analyzer.
• The radiation electric wave from the measurement specimen is changed to the plane wave with a dielectric lens.
• As the measurement in the short distance is possible, there is little attenuation, and it does notrequired the amplifier.
• Therefore, there is little influence such as foreign waves, and anechoic chamber is not required.
• As it can measure it by plane wave in the short distance, the measurement that followed 3m-method and 10m-method is possible by proofreading it beforehand .
• You can observe the place of the radiation of an unnecessary electric wave of the measurement sample, in far field, by moving the measurement sample in the XY stage.

Electromagnetic wave absorption rate measurement system (in near-field / in far-field)