Microwave Absorbing Foam
RFRIGID - Structural Microwave Absorbing Foam
Laird Technologies manufactures a structural foam family with microwave absorbing properties. It is based on the RFRET reticulated foam absorber. RFRET is an excellent free-space absorber, but lacks toughness and environmental resistance. Because RFRET is open-celled, it can be filled with closed-celled structural foam to form RFRIGID. Three standard fillers are used: rigid urethane, flexible urethane and epoxy. The resulting products range from 10 to 20 pounds per cubic foot density and offer a structural environmentally tough panel. The materials can be molded to shape, machined or bonded into complex covers and shapes. If skins are applied, rigid lightweight structural panels are formed.
Laird Technologies has also developed new types of foam, including syntactic foam and phenolic foams. Contact a Laird Technologies applications engineer for more details on these products.
Applications
- Absorptive pucks for spiral antenna cavities
- Fairings for vehicles and radars
- Antenna housings
- Lightweight microwave absorbing barriers
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