The modular microwave ablation system of the present disclosure includes amicrowave instrument, a microwave generator, and one or more auxiliary modulesthatinclude circuitry for performing functions related to the operation of themicrowavegenerator. The one or more auxiliary modules are removably connected to themicrowavegenerator. The microwave generator includes a microwave signal generator thatgenerates amicrowave signal； a microwave generator controller in communication with themicrowavesignal generator； one or more terminals that connect to the one or moreauxiliary modules,respectively； and a power supply and/or a power distribution module coupled tothemicrowave signal generator, the microwave generator controller, and the one ormoreterminals. The one or more terminals provide (1) power from the power supplyand/or powerdistribution module to the one or more respective auxiliary modules and (2)communicationsignals to and from the one or more respective auxiliary modules.
