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EMI Microwave Absorbers

Narrowband Microwave Absorbers:
Tuned
Cavity Resonance

Wideband Microwave Absorbers:
Low Profile
Lossy Foam
Reticulated Foam
Pyramidal Foam

Our Absorbing products, manufactured by Leader Tech are utilised to attenuate microwave energy from 500 MHz to greater than 40 GHz. The unwanted electromagnetic energy is converted into a miniscule amount of heat.

Absorbers are composed of either iron-infused silicone or carbon-coated polyurethane foam. Greatest performance is achieved when absorber thickness is comparable to a quarter of the wavelength of the offending frequency.

Common Applications for EMI Microwave Absorbers:

  • Antenna Cross Talk Reduction and Isolation
  • Radar Cross Section Reduction
  • Instrument Housing
  • Aircraft Seals / Ducts
  • Inside EMI Shields and EMI Reduction
  • Mobile and Digital Devices
view of a narrowband EMI microwave absorber specification sheet.
view of a wideband EMI microwave absorber specification sheet.
view of a wideband EMI microwave absorber specification sheet.
view of a wideband EMI microwave absorber specification sheet.
view of a wideband EMI microwave absorber specification sheet.
view of a narrowband EMI microwave absorber specification sheet.
view of a narrowband EMI microwave absorber specification sheet. view of a wideband EMI microwave absorber specification sheet. view of a wideband EMI microwave absorber specification sheet. view of a wideband EMI microwave absorber specification sheet. view of a wideband EMI microwave absorber specification sheet. view of a narrowband EMI microwave absorber specification sheet.

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  TUNED CAVITY RESONANCE LOW PROFILE LOSSY FOAM RETICULATED PYRAMIDAL
  Off the shelf Tuned absorber series (1-18 GHz), as well as customised absorbers for discrete frequencies (1.3 GHz, 6.5 GHz, 10.9 GHz, etc.) by modifying the thickness and formulation at no additional cost.  Tuned absorbers offer the highest amount of performance, providing an average of 20-30 dB of attenuation. Off the shelf absorber that targets specific frequency increments when exact frequency is unknown.  Cavity resonance absorbers typically provide 15-25 dB of attenuation. Slender, flexible absorber that can easily be added to an array of applications with little or no design modification. Lowest cost solution for attenuating a wide range of frequencies. Open-cell, light weight, low cost solution which can be used as an air filter as well as an EMI absorber. Gradual transition of impedance through the cones provides excellent reflection loss, specifically when applied to the walls of anechoic chambers.
Binder Silicone Silicone Silicone Polyurethane Foam Polyurethane Foam Polyurethane Foam
Filler Iron Iron Iron Carbon Carbon Carbon
Moisture Resistant Yes Yes Yes No No No
Attenuation Level Excellent Very Good Fair Good Good Good
Design Flexibility Very  Good Very  Good Excellent Good Fair Fair
Standard Format Sheet Sheet Roll Sheet Sheet Sheet
Die / Kiss Cut Option Yes Yes Yes Yes Yes No
Cost ££ ££ ££ £ £ £
Lead Time Very Good Excellent Excellent Excellent Excellent Excellent
Catalogue Download PDF Download PDF Download PDF Download PDF Download PDF Download PDF Download
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