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C-RAM GDSS is a thin, magnetically filled, silicone rubber sheet stock which has high loss at microwave frequencies. It is applied to metal surfaces to attenuate RF surface currents. It can be used to modify antenna patterns, lower the Q of a cavity, act as a transmission line attenuator, and modify the radar cross section of targets.
C-RAM GDSS is a thin elastomer sheet, so it will conform to curvatures of the substrate. It is not electrically conductive, and has high dielectric strength. It is a soft material and is readily die-cut or cut with a razor. Since it is made of silicone, it will withstand wide temperature ranges, and survive outdoor exposure.
C-RAM GDSS has a high magnetic loss tangent from about 1 GHz to 20 GHz. It will perform well in the 900 MHz cellular frequencies. Generally, thicker grades are required to attenuate lower frequencies to the same degree as a thinner grade at higher frequency. In the VHF and lower UHF frequencies, C-RAM FDSS will attenuate RF energy better; it has a different magnetic filler, which exhibits high loss tangents at lower frequencies.