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.

【TS Series】Supports a wide frequency band from 0.1MHz to 90GHz. A transparent thin film sheet that can be attached to windows to block radio waves from or into the room. It also prevents glass from scattering and cuts UV rays.

【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

Lineup of Maxell Electromagnetic Wave Absorbers EMW

【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

LI Specifications and basic physical properties
LI Flexibility Basic Structure

Flexibility      Basic Structure 

 

【LI Series】Electromagnetic wave absorption characteristics

LI Electromagnetic wave absorption characteristics

Target frequency for absorption is adjustable
by design change of materials.

LI Electromagnetic wave absorption characteristics

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

【TS Series】Transparent Electromagnetic Wave Shielding Film

Provides a superior Electromagnetic wave shielding effect (-30dB) in wide range (from low to high) with a superior transparency,
flexibility and adhesiveness.

  • High transparency and EMW shielding effect in wide frequency range (0.1MHz-90GHz) by -30dB enabled by the combination of
    EMW shielding layer & hard coat layer
  • Suitable for window film use as UV cut adhesive layer reduces UV

 

【TS Series】Basic physical property

TS Characteristics(typical)

Basic structure

TS Film Roll

Film (Roll)

 

【TS Series】Electromagnetic wave shielding characteristics

TS Electromagnetic wave shielding characteristics KEC

 

【TS Series】Application

  • EMC for 5G communication device
  • Other function / effect:Thermal insulation,Shatter proof,UV Cut

【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 Specifications & characteristics (typical)

PI Pellets

 

【PI Series】Electromagnetic wave absorption characteristics

PI 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 Specifications & characteristics (typical)

PW Pellets

 

【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

PW Electromagnetic wave absorption characteristics

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

ItemRobber SheetFilm (Transparent)
LI Series TS Series
Appearance LI Robber Sheet TS Film Transparent
Frequency Standard:77GHz (adjustable) 0.1MHz~90GHz
Type Sheet (Additional adhesive layer possible) Sheet (with adhesive layer)
Material silicone rubber,ferromagnetic material PET, metal thin film
Thickness 1.5mm 2.0mm 78um
Size Roll / Sheet (at the size you request) Roll of 1524mm width
Method Magnetic loss type Shielding
Application Electronic circuit (IC) Radar (around antenna) Window film
Evaluation FS (Free Space) KEC、FS
Shielding property
(dB) *typical
-20 -33 30 (0.1MHz~90GHz)
Flame retardance UL94 V0 compatible (tested at Maxell)
ItemEngineer Plastic Products
PI Series PW Series
Appearance LI Engineer Plastic Products
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.

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