Aluminium foil often serves as an outer conductor and shielding layer in RF coaxial cables, playing a crucial role in the transmission of radio frequency signals. This metallic layer ensures minimal signal loss and maximum efficiency by providing a conductive path for the signals to travel along the cable. As a shielding layer, aluminium foil protects the signals from external interference. This includes preventing electromagnetic interference (EMI) and radio frequency interference (RFI) from distorting the signal. By acting as a barrier, it maintains the integrity and quality of the signal, ensuring accurate transmission of data. In addition to its conductive and shielding properties, aluminium foil is lightweight, cost-effective, and easy to work with, making it an ideal material for use in RF coaxial cables.