R series adpots high-density round wire knit tinning structure as its outer conductor.Due to nearly 100% coverage afrer tin-plating on shielding layer,which makes the cable with good shielding,higher operating ftequency and good electrical performance.The shielding layer after tin-plating has good bending formability and is suitable for repeated bending with certain forming adjustment.It is often used to replace semi-rigid cable.In terms of electrical performance.It has high poerating ferquency,low VSWR and good shielding.In terms of mechanical property,the ouetr conductor of high-density round wire knit tinning enables the cable strong tensility and good bending formability.In terms of encironmental resistance,due to the characteristics of the raw materials of the inner and outer conductors and insulating layers,the cable has strong encironmental asaptability(-65℃~+165℃),corrosion resistance and mold resistance.But different outer sheathing materials also deterimine different environmental adaptabiity.