1. An apparatus for processing an object in an energy application zone by radio frequency (RF) radiation emitted by one or more radiating elements configured to emit the RF radiation in response to RF energy applied thereto, the apparatus comprising:an RF energy supply component configured to supply RF energy to the one or more radiating elements;
an RF energy measuring device configured to detect, measure, or sense RF energy received by the one or more radiating elements from the energy application zone and produce measured response values;
a memory storing a set of coefficients associated with the RF energy supply component, said set of coefficients being utilized to transform the measured response values; and
a processor configured to receive feedback from the RF energy measuring device in response to emission of RF radiation by the one or more radiating elements and control application of RF energy to the one or more radiating elements based on the feedback and the set of coefficients.