A system, apparatus and method for dissipating standing waves in a microwave energy delivery system including a microwave energy source configured to intermittently delivery microwave energy as a periodic microwave signal an energy delivery network configured to transmit the periodic microwave signal and a circuit connected between the microwave energy source and the energy delivery network. The circuit is configured to pass the periodic microwave signal from the microwave energy source to the energy delivery network when the periodic microwave signal is present and to dissipate standing waves when the periodic microwave signal is absent.
