Five essential indicators must be evaluated when choosing feeder cables for different deployment scenarios:
Frequency Band Matching: Confirm the operating frequency range of the feeder in advance. 5G sub-6GHz networks require feeders supporting wide frequency bandwidth. Using feeders designed only for 2G/3G will trigger sharp attenuation and serious signal distortion under modern 5G signals.
Insertion Loss Index: Compare loss values per meter at core working frequencies. Indoor short-distance wiring can adopt medium-loss lightweight feeders; high tower, long-distance outdoor deployment must prioritize ultra-low-loss heavy-duty cables to avoid cumulative signal loss.
Shielding Performance: High shielding effectiveness is non-negotiable for dense urban and indoor DAS. 100% coverage foil plus dense copper braiding suppress inter-system interference, preventing dropped connections and network speed fluctuation in commercial buildings, subways and campuses.
Environmental Grade & Protection Rating: Outdoor feeders need UV-resistant outer sheaths, waterproof joint accessories and anti-freezing materials to adapt to rain, snow, high temperature and coastal salt fog. Indoor feeders adopt flame-retardant LSZH sheath to meet fire safety standards of shopping malls and office buildings.
Mechanical Durability: Check bending radius, tensile strength and compression resistance. Construction processes require repeated bending and laying through pipeline shafts; feeders with poor mechanical properties will suffer conductor deformation and rising loss after construction.
