Surge arrester, also called lightning arrester, is an electronic device that provides safety protection for various electronic equipment、 instruments and communication lines.When a peak current or voltage is suddenly generated in an electrical circuit or a communication loop due to external interference,surge arrester can conduct shunt in a very short time,thus avoiding the damage of surge to other equipment in the loop.In RF communication,gas tube arrester and quarter-wave arrester are widely used.Surge arresters are used to protect communication equipment signal lines from lightning electromagnetic pulse, induced over-voltage and operating over-voltage, and are widely used in RF loop protection in wireless coverage,  mobile base stations and other communication fields.