C-RAM RGD-S

C-RAM RGD-S is a filled silicone rubber sheet material with a high magnetic loss. It is available in three grades: -117, -124 and -192. The -192 grade has the highest loading and highest loss.

C-RAM RGD-S is used for terminations, loads and attenuators in waveguides, coaxial lines and microstrip circuits. It can also be used for lowering the Q of cavities and eliminating unwanted resonances.

It is cut readily with a sharp knife, and can be sawed, die cut, waterjet cut or otherwise machined to complex shapes. Since it is ferromagnetic, it is easily held in place during machining with magnetic chucks. It is flexible and can be bonded to contoured surfaces.

Key Features

• Specific gravity: 4.0
• Thermal expansion per °C: 6 × 10⁻⁵
• Thermal conductivity: 0.0021 cal-cm/sec-cm²-°C (6.0 BTU-in/hr-ft²-°F)
• Service temperature: −55 to +200 °C (−65 to +400 °F)
• Hardness, Shore A: 75
• Water absorption, 24 hrs: 1010
• Dielectric strength: >400 kV/mm (>100 V/mil)
• Relative impedance (Z/Zo): 0.3 for -117, 0.4 for -124, 0.6 for -192