Self-calibrated radio frequency calorimeter

A method for measuring RF power, comprising:

• coupling a load of an RF calorimeter to a low-frequency reference source through an RF switch during a calibration cycle;
• generating calibration data from a temperature difference measured across the load during the calibration cycle;
• coupling the load to an RF input through the RF switch during a measurement cycle;
• and
• determining a power value of an RF source coupled to the RF input using the calibration data and a further temperature difference measured across the load during the measurement cycle.

A non-transitory computer-readable storage medium storing instructions that, when executed by a processor of a controller of an RF calorimeter, cause the controller to perform operations comprising:

• operating an RF switch to couple a load of the RF calorimeter to a low-frequency reference source during a calibration cycle;
• generating calibration data from a temperature difference measured across the load during the calibration cycle;
• operating the RF switch to couple the load to an RF input during a measurement cycle;
• and
• determining a power value of an RF source coupled to the RF input using the calibration data and a further temperature difference measured across the load during the measurement cycle.