C-RAM GDX is a thin, magnetically filled rubber sheet stock which has high loss at microwave frequencies from 1 to 35 GHz. 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 GDX is thin and elastomeric, 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 diecut or cut with a razor. Being based on a silicone rubber, it will withstand wide temperature ranges, and survive outdoor exposure.

C-RAM GDX has a high magnetic loss tangent from 1 GHz to 18 GHz. Thicker grades are required to attenuate at lower frequencies to obtain the same performance as a thinner grade at higher frequencies.

Cuming Microwave C-RAM GDX - High Loss Silicone Rubber Sheet Absorber for Suppression of Surface Waves - 1 Unit / Box