Profile: Power-Tech is a manufacturer and exporter of power products such as cable assemblies, coaxial cable connectors, flexible coaxial & fiber optic cables. Our RF couplers consist of RF directional couplers. The couplers are provided with a bi-directional coupler, which is a 4-port device that produces two unequal amplitude outputs when a signal is fed through the input port. Our diplexer is a three-port frequency-dependent device that may be used as a separator or a combiner of signals. The device consists of two fixed tuned band-pass filters sharing a common port. The common port and the output of the two filters form the three terminals of the diplexer.