Method of 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, wherein the method includes controlling supply of RF energy to the one or more radiating elements via an RF energy supply component, receiving measured response values produced based on RF energy received by the one or more radiating elements from the energy application zone, accessing a stored set of coefficients associated with the RF energy supply component, said set of coefficients being utilized to transform the measured response values and controlling application of RF energy to the one or more radiating elements based on the measured response values and the set of coefficients.

A method for heating or cooking a frozen food product with a susceptor in a solid state microwave oven includes placing the frozen food product with a susceptor into a microwave oven, heating the food product at a first heating step at a low absorption frequency, and heating the food product at a second heating step at a high absorption frequency.

An apparatus for applying electromagnetic energy to an object in an energy application zone via at least one radiating element is disclosed. The apparatus may include at least one processor. The at least one processor may be configured to determine a value indicative of energy absorbable by the object at each of a plurality of frequencies and to cause the at least one radiating element to apply energy to the zone in at least a subset of the plurality of frequencies. Energy applied to the zone at each of the subset of frequencies may be a function of the absorbable energy value at each frequency.

The present disclosure provides a microwave cooking apparatus, a control method, and a storage medium. The microwave cooking apparatus comprises: a housing capable of enclosing a heating chamber therein; a solid microwave source disposed on the housing and used for emitting a first variable-power microwave; an antenna connected to the solid microwave source and used for feeding the first variable-power microwave into the heating chamber; and a controller connected to the solid microwave source and used for controlling the solid microwave source to operate and adjusting the first variable-power microwave. According to the technical solution of the present disclosure, on one hand, a better heating effect is able to be achieved for sealed foods, and on the other hand, a better unfreezing effect is also able to be achieved because the power of a solid microwave source is much lower than that of a magnetron so that during an unfreezing operation, foods to be defrosted will not be locally cooked resulting from local overheating caused when the foods to be defrosted locally absorbs too much heat due to excessive power.

A method of operating cooking appliance includes activating a motor to rotate a turntable within a cooking cavity defined in a casing of the cooking appliance. The methods also includes activating a microwave module for delivering microwave energy into the cooking cavity in response to the turntable reaching a first angular position after activating the motor to rotate the turntable and deactivating the microwave module in response to the turntable reaching a second angular position after the first angular position.

A method for controlling a power of an electromagnetic cooking device is shown. The method includes controlling a power supply to deliver a power level to the amplifier and monitoring at least one RF feed delivered to an enclosed cavity. The method further includes identifying an output power based on the RF feed and comparing the output power to a maximum power. A power difference of the output power compared to a target power is determined, and the power difference is compared to a plurality of difference thresholds. Based on the comparison, the power level is adjusted by a plurality of power adjustment magnitudes.

An embodiment of a heating system includes a cavity configured to contain a load, a thermal heating system (e.g., a convection, radiant, and/or gas heating system) in fluid communication with the cavity and configured to heat air, and an RF heating system. The RF heating system includes an RF signal source configured to generate an RF signal, first and second electrodes positioned across the cavity and capacitively coupled, a transmission path electrically coupled between the RF signal source and one or more of the first and second electrodes, and a variable impedance matching network electrically coupled along the transmission path between the RF signal source and the one or more electrodes. At least one of the first and second electrodes receives the RF signal and converts the RF signal into electromagnetic energy that is radiated into the cavity.

In a solid-state heating system, once a load with specific load characteristics has been placed in a heating cavity, a processing unit produces control signals that indicate an excitation signal frequency and one or more phase shifts, which constitute a combination of parameter values. Multiple microwave generation modules produce RF excitation signals characterized by the frequency and the phase shift(s). Multiple microwave energy radiators radiate, into the heating cavity, electromagnetic energy corresponding to RF excitation signals received from the microwave generation modules. Power detection circuitry takes reflected RF power measurements, and the processing unit determines a reflected power indication based on the measurements. The process is repeated for different combinations of the parameter values, and an acceptable combination of parameter values is determined and stored in a memory of the heating system. Acceptable combinations of parameter values similarly may be determined and stored for other loads with different load characteristics.

A microwave system has a solid-state generator which generates microwave energy and includes at least one control input for receiving a control signal to vary electrically a parameter of the microwave energy. A microwave load receives the microwave energy and produces an effect in response to the microwave energy. A microwave conducting element couples the microwave energy to the microwave load. An impedance match adjusting device is coupled to the microwave conducting element to vary at least one of the parameters of the microwave energy. The effect produced in response to the microwave energy is altered by both electrical variation of the parameter of the microwave energy via the control signal and adjustment of the impedance match adjusting device to vary the parameter of the microwave energy.

An apparatus for heating plastic preforms with a transport device which includes holding devices for holding the plastic preforms and wherein the transport path has at least one heating portion inside which the plastic preforms are heated, and with a heating device arranged stationarily at least in portions along the transport path and which heats the plastic preforms transported by the transport device during their transport through the heating portion, wherein the heating device has at least one in particular stationary applicator device which is configured for bombarding the plastic preforms with microwaves to heat them. In the heating portion, the transport device is arranged relative to the applicator device such that at least parts of the holding devices are arranged outside the applicator device, wherein the applicator device is configured to receive several plastic preforms simultaneously for at least some of the time.