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
(Near-field / Far-field)

Model No. XEA

KEYCOM develops and manufactures highly accurate and practical
electromagnetic wave absorption rate measurement systems for a large variety of applications by leveraging its rich experience and expertise in the electromagnetic wave absorption theory, electronic material characteristics and programming skills accumulated over a long period of time.

1. Software

Single Layer Type / Multi-layer Type, Electric Wave Absorber, Return Loss Simulation Software eas01
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

2. Far-field, electric wave absorber (material), return loss measurement system

2-1 Lens antenna type

Standardization
JIS R1679 : 2007
IEC 62431 : 2008

Lens Antenna Method, Diagonal Incidence Type
Electric Wave Absorber, Return Loss Measurement System (2.6-26.5GHz)

eas03
Lens Antenna Method, Vertical Incidence Type Electric Wave Absorber, Return Loss Measurement System eas07 Portable Type
Lens Antenna Method, Vertical Incidence Type
Electric Wave Absorber, Return Loss Measurement System
eas12
Electromagnetic Wave Transmissive Thermostat Chamber
(-60°C ~+200°C)
emd01
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 conventional systems 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.
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 conventional systems because they can be placed in the vicinity of the antennas.
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 conventional systems because they can be placed in the vicinity of the antennas.
This thermostat chamber enables temperature characteristics measurement on radome, cover, electromagnetic wave absorbent, or shielding material.
It is comprised of high or low temperature blowers, and a electromagnetic transmissive heat-retaining box in which your sample is measured.
(Pictured above is the EMD01 with KEYCOM’s shield effect measurement system on the right. The shield effect measurement system is sold separately.)
EMD01 can be designed and manufactured to your specific requests.

2-2. Low frequency

Low frequency, Micro Strip Line Method
Electric Wave Absorber, Return Loss Measurement System
eas08
EAS08 measures the return loss of a relatively small sample of electric wave absorber in the MHz range.

3. Near-Field Noise Suppression Sheet Evaluation System

IEC Standard No.:IEC62333-1, IEC62333-2
Near-Field
Noise Suppression Sheet Evaluation System
Intra/Inter ・ Decoupling Ratio Measurement System (Rda・Rde Measurement System)
nss02
Near-Field
Noise Suppression Sheet Evaluation System
Transmission Attenuation Power Ratio Measurement System
(Rtp Measurement System)
nss03
Noise Suppression Sheet Characteristics Evaluation System
(For Near-Field, Electric Wave Absorption Material Measurement System)
Radiation Suppression Ratio Measurement System
(Rrs measurement system) -Anechoic Chamber is not required-
nss05
Near-Field
Noise Suppression Sheet Evaluation System
For Anechoic Chamber
Radiation Suppression Ratio Measurement System
(Rrs Measurement System)
nss04
A Japanese team proposed a standardization of the evaluation method of noise suppression sheet to IEC in 2003, and it was enacted in May, 2006. (KEYCOM participated as a committee member.)
KEYCOM then became one of the first companies to commercialize the measurement kit based on this evaluation method.
The kit was intended for the evaluation of electric wave absorption materials used for the prevention of oscillation and as an anti-EMI measure in cellular communication devices.
In a small container such as a cell phone, the electromagnetic wave tends to be easily distorted, or the electric field and the magnetic field exist independently and disorderly.
It is essential for an ideal electric wave absorption material to carry a large electric wave absorption rate in the near field and not to disturb the impedance of the circuit even in such a harsh environment.
A Japanese team proposed a standardization of the evaluation method of noise suppression sheet to IEC in 2003, and it was enacted in May, 2006. (KEYCOM participated as a committee member.)
KEYCOM then became one of the first companies to commercialize the measurement kit based on this evaluation method.
The kit was intended for the evaluation of electric wave absorption materials used for the prevention of oscillation and as an anti-EMI measure in cellular communication devices.
In a small container such as a cell phone, the electromagnetic wave tends to be easily distorted, or the electric field and the magnetic field exist independently and disorderly.
It is essential for an ideal electric wave absorption material to carry a large electric wave absorption rate in the near field and not to disturb the impedance of the circuit even in such a harsh environment.
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.
A Japanese team proposed a standardization of the evaluation method of noise suppression sheet to IEC in 2003, and it was enacted in May, 2006. (KEYCOM participated as a committee member.)
KEYCOM then became one of the first companies to commercialize the measurement kit based on this evaluation method.
The kit was intended for the evaluation of electric wave absorption materials used for the prevention of oscillation and as an anti-EMI measure in cellular communication devices.
In a small container such as a cell phone, the electromagnetic wave tends to be easily distorted, or the electric field and the magnetic field exist independently and disorderly.
It is essential for an ideal electric wave absorption material to carry a large electric wave absorption rate in the near field and not to disturb the impedance of the circuit even in such a harsh environment.