A coaxial terminator, also known as a coaxial load, is an electrical device used to cap the end of a transmission line or a port in a radio frequency (RF) circuit. Its primary function is to absorb signals and prevent them from reflecting back into the system, which can cause interference and degrade performance. They are essential in maintaining signal integrity by eliminating standing waves and reducing noise, which can otherwise lead to data loss or signal distortion. In the context of cellular Distributed Antenna Systems (DAS), coaxial terminators are used to terminate unused ports on splitters, combiners, and cables. This ensures that the RF signals are properly absorbed and do not reflect back into the system, which could cause interference with the transmitted signals.