Before revision: Symbol for a 3-Port Circulator In electrical engineering, an Active Circulator is an active non-reciprocal three-port device that couples a microwave or radio-frequency signal only to an adjacent port in the direction of circulation.
After revision: Symbol for a 3-Port Circulator In electrical engineering, an active circulator is an active non-reciprocal three-port device that couples a microwave or radio-frequency signal only to an adjacent port in the direction of circulation.