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 wave absorption rate measurement systems , fully utilizing its rich experience and expertise in the electromagnetic wave absorption theory, electronic material characteristics and programming skills.

【Related Contents】
👉 Products Line-up of Shielding Effectiveness Measurement System
👉 Products Line-up of Automotive Emblem / Radome / Radar Cover Evaluation System

1. Software

For Designing Wave Absorber

Single Layer Type / Multi-layer Type, Electric Wave Absorber, Return Loss Simulation Software [EAS01]

You can select the two variables you want to optimize among relative permittivity, εr'', relative permeability μr'', sample thickness, and frequency, and let the system run to calculate them.

In this way, by repeating various combinations several times, the optimum relative permittivity, relative permeability, or sample thickness can be obtained.
 

For Designing Car emblem / Radome

Multilayer plate Simulation software for making designs of emblem and radome [SFW05]

  • This is a simulation software of transmission attenuation and reflection attenuation amount for designing emblems etc.,
  • With this software, you can simulate transmission attenuation amount of multilayer plate (max. 4layers) by using permittivity (εr' ) and permeability (μr')
  • By setting permittivity and/or permeability of the materials which you will use, it graphs the relation of thickness of material and transmission / reflection attenuation amount in real-time.
  • You can set incident angle, TM and TE wave.
 

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

2-1 Lens antenna method measurement device

Standard: JIS R1679(2007), IEC 62431(2008)

Lens Antenna Method, Diagonal Incidence Type
Electric Wave Absorber, Return Loss Measurement System (2.6-26.5GHz) [EAS03]

Suitable for evaluation of radio wave absorbing materials and shielding materials
Errors due to airgaps don't occur
Unlike coaxial tube and waveguide types, the sample is not placed inside the fixture.
Perform measurement with plane waves
A lens is attached to the antenna, so that the sample can be measured with plane waves despite its compactness. In addition, the sample can be set near the antenna, so the sample can be smaller.
Vertical incidence measurement with VNA
The system can also perform vertical incidence measurements (when using a vector network analyzer).
Direct measurement of concrete walls and asphalt roads
We also have a transportable type, to directly measure Non-movable samples such as concrete walls and asphalt roads.
 

Lens Antenna Method, Vertical Incidence Type Electric Wave Absorber, Return Loss Measurement System [EAS07]


Errors due to airgaps don't occur
Unlike coaxial tube and waveguide types, the sample is not placed inside the fixture.
Perform measurement with plane waves
A lens is attached to the antenna, so that the sample can be measured with plane waves despite its compactness.
Small samples measurable
Samples can be set near the antenna, so the sample can be smaller.
 

Portable Type, Lens Antenna Method, Vertical Incidence Type
Electric Wave Absorber, Return Loss Measurement System [EAS12]

This is a portable type of EAS07. It is possible to measure the amount of reflection, with radio wave absorber attached to a sample.
You can move antenna easily, and the effect of seams can be clearly seen.
 

Wave Pass-Through Thermostat

Electromagnetic Wave Transmissive Thermostat Chamber (-60°C ~+200°C) [EMD01]

This is a thermostatic chamber for measuring the temperature characteristics of radomes, covers, radio wave absorbers, and shielding effects.

It consists of a high/low temperature blower and a heat insulation box to hold a sample for measurement.

*Image on the left is a use case with radio wave absorber measurement system(right side), which is NOT included in this product.
 

3. Near-Field Noise Suppression Sheet Evaluation System

IEC Standard No.IEC62333-1, IEC62333-2

In 2003, a Japanese team proposed a standardization of the evaluation method of noise suppression sheet to IEC, and it was enacted in May, 2006. (KEYCOM participated as a committee member.)
Since then, KEYCOM has been one of the front-runners to develop and commercialize this measurement kit in compliance with the IEC standard.

It is used to evaluate radio wave absorbing materials used fot preventing oscillation and EMI countermeasure in devices such as mobile phones.

In narrow cases such as smart phone cases, the electromagnetic waves are disorganized and the electric and magnetic fields are independent of each other.

In such a situation, radio wave absorbing material is required to have a large radio wave absorption rate in the near field, not disturbing impedance of the circuit.

Measure Intra/Inter Decoupling Ratio(Rda/Rde)

Measure Transmission Attenuation Power Ratio(Rtp)

Measure Radiation Suppression Ratio (Rrs)--1

Measure Radiation Supression Ratio (Rrs)--2

*This type requires No Anechoic Chambers.