(20) RFHC is a broadband microwave absorbing honeycomb core material. R&F uses either Nomex or fiberglass honeycomb core and applies a “lossy” coating to it. The RF core can have a uniform coating to optimize insertion loss or a graded coating to optimize reflection loss. The cell sizes generally used are 0.125" to 0.187" (3.2 mm to 4.8 mm) thick with densities of 3 to 4 lb./ft³. Typical performance of a 0.5" (12.7 mm) thick core, providing good attenuation over a broad frequency range. We can optimize the performance to account for laminated skins or core and can assist in selecting the right materials to minimize performance degradation. Other materials or combinations of attributes are available. The thicker the core material, the ...
(7) RFSS screen absorbers are thin, extremely lightweight absorbers that are optimized to provide a high degree of absorption for specific frequencies in the range of 1 to 18GHz. Construction consists of a conductive carbon coated “lossy” fabric, separated from a conductive ground plane by a low dielectric foam core. As a tuned (narrowband) absorber, the material must have an electrical thickness of 1/4 of a wavelength at the frequency of operation. This promotes signal attenuation by both energy dissipation within the “lossy” fabric material, as well as cancellation of the incoming and emerging signals at the surface, where they are 180° out of phase. Through accurate control of the coating process used for the “lossy” fabric, ...
R&F Products has the capability to integrate microwave absorbing or reflecting properties into custom covers, screens and other textile products. Many of these products are based upon R&F Products RFRET foam material. RFRET is open-celled lightweight foam, which is flexible and provides excellent broadband microwave absorption. The absorber can be sewn or RF welded into different textile materials. The textile cover is chosen based upon the environmental properties desired. Vinyl, neoprene, silicone and Hypalon are commonly used materials. Reinforcements include nylon, fiberglass, polyester and Kevlar. A variety of attachment schemes can be used including Velcro, zippers, buckles, tie downs and other standard attachments. Camouflage ...
