Abstract: A system for internal heat treatment of specific bodies by microwave including a generator 1 of microwave energy at a frequency f0, at least one channel for transmission of the microwave energy, each channel making it possible to generate a modulated microwave treatment signal, the wave of the microwave energy of two consecutive channels exhibiting a phase shift of defined value. At least one microwave applicator is associated with one of the channels in order to ensure application of the microwave energy delivered by this channel at separate adjacent points of the area Z to be treated, and a dual-temperature-reference radiometer is interconnected selectively to the applicator which then plays the role of temperature sensor, the absolute temperature of the adjacent point of the area Z to be treated being thus determined. The microwave powers radiated and the instantaneous temperatures of the separate points of the area Z to be treated are displayed.

Abstract: The device comprises a microwave detector, a short-circuit microwave, a first modulator, or microwave-switch, a circulator with three successive channels, at least two sources of internal reference temperatures, a second modulator or microwave-switch, possibly an attenuator, a synchronization command circuit acting both on the first modulator and on the second modulator to obtain at least four different successive outgoing signals, a microwave detector, advantageously a microwave amplifier, and a calculator connected to the output of synchronization command circuit, said at least four successive signals being detected to deduce therefrom the temperature at the detector level, independently of the coefficient of reflection of the detector with respect to the region of the losses and of the modulators and of the cables.