Far Field Noise Countermeasures
Maxell provides the electromagnetic wave absorbers that are compatible with the millimeter-wave band for ADAS radar and 5G communication, and even terahertz wave band. We mainly provide electromagnetic wave absorbers suitable for the far field use.
【LI Series】Supports ADAS radar band (77GHz). Optimal for controlling spatial noise with little dependence on the electromagnetic wave absorption characteristics depending on the angle of incidence.
【PI Series】Supports ADAS radar band (77GHz). There is little dependence of the electromagnetic wave absorption characteristics depending on the angle of incidence. Provided as a molding material (Pellets) that can be injection molded.
【PW Series】Supports ADAS radar band (77GHz). Supports a wide millimeter-wave frequency band. Provided as a molding material (Pellets) that can be injection molded.
Lineup of Maxell Electromagnetic Wave (EMW) Absorbers
【LI Series】77GHz Compatible Electromagnetic Wave Absorber Rubber Sheet
This rubber sheet which exhibits excellent absorption characteristics in 77GHz band used by the ADAS millimeter wave radar.
Since the dispersed magnetic material absorbs radio waves, it has excellent oblique incidence characteristics.
- The magnetic resonance effect by magnetic iron oxide enables conversion of EMW in the millimeter-wave band into heat.
- Target frequency for absorption is adjustable by design change of materials.
- Attenuation characteristic is rather stable against incidence angle changes of wave.
- Silicone rubber base with flexibility Additional adhesive layer is possible which is easy to attach on the target.
【LI Series】Specifications and basic physical properties
Flexibility Basic Structure
【LI Series】Electromagnetic wave absorption characteristics
Target frequency for absorption is adjustable
by design change of materials.
Frequency as well as volume of its adsorption is
rather stable against incidence angle changes of wave.
【LI Series】Main applications
- Electromagnetic wave absorption for automotive millimeter-wave radar
- Suppression & absorption of radiated radio wave from millimeter-wave Radar antenna
【PI Series】77GHz Compatible Electromagnetic Wave Absorber – Molding Material (Pellets)
Magnetic material to absorb high frequency (millimeter-wave) band is dispersed in engineer plastic and it can be used to create noise
suppression components such as in-vehicle millimeter-wave radar.
- The magnetic resonance effect by magnetic iron oxide enables conversion of Electromagnetic wave in the millimeter-wave band into heat.
- Better incident angle characteristics as well as low reflection than carbon absorber
- It is possible to control absorption frequency at millimeter-wave band.
- You can produce any shape of Electromagnetic wave absorber at your option by injection molding or extrusion molding.
【PI Series】Specifications and basic physical properties
【PI Series】Electromagnetic wave absorption characteristics
Transmission attenuation characteristics [S21] / [S11]
on molded plate (example)(Resin：PA6, Plate thickness：3mm)
Absorption characteristic is adjustable to suit your needs.
【PI Series】Main applications
- Automotive radar cover
- Electromagnetic wave masking for radar equipment
【PW Series】60～79GHz Compatible Electromagnetic Wave Absorber – Molding Material (Pellets)
Electromagnetic wave absorber pellets compatible with wider range of frequency by dispersed carbon.
It can be used to create noise suppression components for various usage such as ADAS, motion sensor, etc.
- Converting Electromagnetic wave in millimeter-wave range into heat by dielectric loss effect in absorption layer.
- Electromagnetic wave absorption in wider range of millimeter frequency.
- Superior attenuation characteristics of carbon by its ideal level of dispersion control.
【PW Series】Specifications and basic physical properties
【PW Series】Electromagnetic wave absorption characteristics
Electromagnetic wave absorption in wider range of millimeter frequency
Attenuation characteristic control & material change possible subject to your needs
Transmission absorption characteristics [S21]
on molded plate (example)(Resin：PA6, Plate thickness：3mm)
【PW Series】Main applications
- Automotive radar cover
- Electromagnetic wave masking for radar equipment
- Noise suppression for sensor unit monitoring passengers
Far Field Compatible：High Frequency Absorber Line Up & Specifications
| Item | Robber Sheet | |
|---|---|---|
| LI Series | ||
| Appearance |  |
|
| Frequency | Standard：77GHz (adjustable) | |
| Type | Sheet (Additional adhesive layer possible) | |
| Material | silicone rubber,ferromagnetic material | |
| Thickness | 1.5mm | 2.0mm |
| Size | Roll / Sheet (at the size you request) | |
| Method | Magnetic loss type | |
| Application | Electronic circuit (IC) Radar (around antenna) | |
| Evaluation | ||
| Shielding property (dB) *typical |
-20 | -33 |
| Flame retardance | UL94 V0 compatible (tested at Maxell) | |
| Item | Engineer Plastic Products | ||
|---|---|---|---|
| PI Series | PW Series | ||
| Appearance |  |
||
| Frequency | Standard：77GHz (adjustable) |
Standard：60～79GHz (adjustable) Broad Band Type |
|
| Type | Pellets | ||
| Material | PA6 (applicable to other material) Magnetic Material |
PA6 (applicable to other material) Carbon |
|
| Size | About 3mm granular | ||
| Method | Magnetic loss type | Dielectric loss type | |
| Application | Millimeter-wave radar cover, bumper parts, etc. | ||
| Evaluation | FS (Free Space) | ||
| Transmission (dB) | PA6 Plate with 3mm thickness |
-14 | -13 |
| Reflection (dB) | -7 | -5 | |
- PI series and molded products of PW series correspond to the list regulated products of export control.
- Please contact us as the characteristics can be adjusted upon request.
