Rg11 standard shied Rg type Construction Itemmaterialdiameter(inch/mm) Inner conductorcopper clad steel(ccs)/bare copper(cu)0.064 1.63 Dietectricfoam pe0.280 7.11 First shieldbonded aluminum foil0.288 7.32 Second shieldaluminum/bare copper/tinned copper braid0.312 7.92 Jacketpvc0.400 10.16 Electrical characteristics Capacitance(pf/m)52+/-2 Impedance(î75+/-3 Velocity of propagation(%)85.0 Return loss(db) 5-1000mhz22 1000-2000mhz20 Screening effectiveness(db) 5-1000mhz85 Attenuation(20 Frequencymax attenuationmax attenuation (mhz)(db/100ft)(db/100m) 50.4 1.3 551.0 3.2 1871.7 5.7 2111.9 6.2 4002.6 8.5 5002.9 9.5 7503.6 11.9 8604.0 13.1 10004.3 14.3 15005.1 16.8 18005.7 18.6 22006.3 20.7 30007.6 24.9