RG178 is a type of coaxial cable known for its flexibility, thin diameter, and high-frequency signal transmission capabilities. It typically features a PTFE (Polytetrafluoroethylene) insulation and a silver-plated copper braid shielding, making it suitable for high-temperature and high-frequency applications. RG178 is commonly used in aerospace, telecommunications, and military applications where compact size and reliable performance are critical. Its characteristic impedance is 50 ohms, and it is capable of operating effectively at frequencies up to 3 GHz.