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MICROWAVE ABSORBERS

EMI ESSENTIALS - 12624 Microwave Absorbing Foam

PROVIDES ISOLATION OR SIDE LOBE REDUCTION Available in different dimensions and die-cuts

Microwave absorbing foam is commonly used around antennas and wireless devices to provideisolation or side lobe reduction.It can be die-cut into components for EMI reduction inside microwave cavities and is used tomanufacture antenna hats and test boxes. It can be encapsulated into a textile cover for use outdoors and fabricated into blankets, covers and other components. Recently, it has been used for a combination air/EMI filter in networking equipment. The product can be made UL94 HF1 for such applications.

RFRET – Reticulated Foam Absorbers Features and Benefits:

RFRET is a urethane-based reticulated foam absorber. RFRET isoffered with a graded carbon coating providing excellent broadband reflectivity reduction. RFRET with constant carbon loading provides excellent insertion loss. RFRET is useful for antenna sidelobe reduction and pattern enhancement. •Typical applications: antennas, amplifiers, oscillators, computerhousings and wireless equipment• Lowers the noise or cavity Q in microwave components •Can be supplied with PSA backing•Available in a wide variety of dimensions and can easily be die cut•Excellent performance at low frequencies (>100 MHz)

RFRET/CV– Convoluted Reticulated Foam Absorbers

RFRET/CV is a convoluted (egg-crate) shaped foam. This shape allows for graded impedance which provides broadband reflectivity. RFRET/CV is useful for shielding enclosures and antenna testing. Product Category P/N Thickness (in) Frequency Performance Other

RFLS-Lossy Foam Absorbers

RFLS-22 5163 0.125 3.0 GHz -10 dB/in I/L PSA RFLS-26 5099 0.125 3.0 GHz -46 dB/in I/L PSA RFLS is a single layer “lossy” sheet produced by dippinglightweight open-celled urethane foam into a resistivesolution. The end product is a uniform lightweight, loaded sheet material with a specified insertion loss at a given frequency. RFLS offers the lowest cost inmicrowave absorber products. RFLS-22 5164 0.250 3.0 GHz -10 dB/in I/L PSA RFLS-26 5102 0.250 3.0 GHz -46 dB/in I/L PSA RFLS-22 5162 0.500 3.0 GHz -10 dB/in I/L PSA RFLS-26 5041 0.500 3.0 GHz -46 dB/in I/L PSA RFRET 4001 0.500 8-18 GHz -20dB R/L –

RFML – Multilayer Foam Absorbers

RFRET 4002 0.750 6-18 GHz -20dB R/L – RFML is a multilayer foam absorber consisting of threesheets of RFLS material. The layers vary in insertion loss from the front to the back of the material, offeringexcellent broadband performance. RFRET 4062 1.000 5-18 GHz -20dB R/L – RFRET 4029 1.250 4-18 GHz -20dB R/L – RFCV 4506 1.500 4-18 GHz -20dB R/L –

RFRIGID – Structural Microwave Absorbing Foam

RFCV 4501 3.000 2-18 GHz -20dB R/L –
* Other: PSA-Pressure Sensitive Adhesive, FR-Fire Retardancy (UL-V0) rated. R/L-Reflection Loss, I/L- Insertion Loss. RFRIGID is structural foam with microwave absorbingproperties. It is based on the RFRET absorber and is filled with closed-celled structural foam. RFRIGID is an excellent broadband absorber with great toughness and environmental resistance.
For additional information on any of the other products available, please contact sales for assistance or visit www.lairdtech.com.

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