What is Low Loss cable?
The term low loss refers to the cable's relative low attenuation (or loss) over distance. The fundamental difference between standard RG cable and low loss coaxial cable is the type of shielding. Low loss cable provides you with superior shielding in comparison with typical RG style cable. In turn, this gives you superior low loss.
As well as this, low loss coaxial cables use solid center conductors. This provides lower attenuation than stranded conductors, which are sometimes found on RG style cables.
Low loss coaxial cables are designed for use in WLAN, Cellular, PCS, ISM and several other wireless applications. It's likely there will be a L-Com low loss cable that will fit your requirements.