An electromagnetic cooking device includes a cavity in which a food load is placed, a plurality of RF feeds for introducing electromagnetic radiation into the enclosed cavity, and a controller configured to select a heating target including a plurality of unrotated resonant modes; detect asymmetries of the food load relative to a center of the enclosed cavity and select rotations for the plurality of unrotated resonant modes that compensate for the detected asymmetries of the food load to generate a plurality of optimized resonant modes; generate a heating strategy having a selected sequence of the optimized resonant modes; cause the RF feeds to excite the enclosed cavity with a selected set of phasors for a set of frequencies corresponding to each resonant mode of the selected sequence of optimized resonant modes; and monitor the created heating patterns using closed-loop regulation to selectively modify the sequence of optimized resonant modes.

A thawing method for a thawing device includes: generating a radio frequency signal; acquiring the radio frequency signal; an upper electrode plate and a lower electrode plate of the thawing chamber generating, according to the radio frequency signal, radio frequency waves having a corresponding frequency in a thawing chamber and thawing an object to be processed, obtaining voltages and currents of the incident wave signal and reflected wave signal, and determining a thawing progress of the object to be processed.

A thawing method for a thawing device includes: generating a radio frequency signal; acquiring the radio frequency signal; an upper electrode plate and a lower electrode plate of the thawing chamber generating, according to the radio frequency signal, radio frequency waves having a corresponding frequency in a thawing chamber and thawing an object to be processed, obtaining voltages and currents of the incident wave signal and reflected wave signal, and determining a thawing progress of the object to be processed.

A heating cooking apparatus (100) includes a heating cooking chamber (100A) and a microwave supply unit (15). An object to be heated (H) is accommodated in the heating cooking chamber (100A). A microwave supply unit (15) includes a radiation port (15C) and supplies microwaves to the heating cooking chamber (100A) through the radiation port (15C). The radiation port (15C) is positioned below the heating cooking chamber (100A). The heating cooking apparatus (100) further includes a partitioning member (15B) that covers the radiation port (15C) and a placing portion (22) on which the object to be heated (H) is placed.

A heating cooking apparatus (100) includes a heating cooking chamber (100A) and a microwave supply unit (15). An object to be heated (H) is accommodated in the heating cooking chamber (100A). A microwave supply unit (15) includes a radiation port (15C) and supplies microwaves to the heating cooking chamber (100A) through the radiation port (15C). The radiation port (15C) is positioned below the heating cooking chamber (100A). The heating cooking apparatus (100) further includes a partitioning member (15B) that covers the radiation port (15C) and a placing portion (22) on which the object to be heated (H) is placed.

A frequency reconfigurable phased array system comprises a signal generator outputting a power signal with an adjustable frequency, a plurality of radio frequency (RF) modules receiving the power signal, a control module generating excitation mode parameter sets and material processing event sets, a first database storing the excitation mode parameter sets, and a second database storing the material processing event sets. The control module generates a material processing schedule by selecting one of the material processing event sets based on a material recipe, an average power, and a total time of a material, and controls a signal frequency of the signal generator according to the material processing schedule and the excitation mode parameter sets, and a RF phase and a RF power of each of the RF modules, to have the RF modules generating a power signal.

An electromagnetic cooking device is provided having a controller and a plurality of RF feeds configured to introduce electromagnetic radiation into an enclosed cavity to heat up a food load. The controller is configured to: select a heating target; generate a heating strategy to determine a sequence of desired heating patterns; cause the RF feeds to output an RF signal to thereby excite the enclosed cavity; monitor the created heating patterns to measure resonances in the enclosed cavity and store a map of efficiency in frequency and phase domains from which the controller identifies resonant modes and Q-factors associated therewith; continue to monitor the created heating patterns and store maps of efficiency in the frequency and phase domains until a specified change is detected in at least one Q-factor; and when the specified change in the at least one Q-factor is identified, stop cooking the food load.

An electromagnetic cooking device is provided having a controller and a plurality of RF feeds configured to introduce electromagnetic radiation into an enclosed cavity to heat up a food load. The controller is configured to: select a heating target; generate a heating strategy to determine a sequence of desired heating patterns; cause the RF feeds to output an RF signal to thereby excite the enclosed cavity; monitor the created heating patterns to measure resonances in the enclosed cavity and store a map of efficiency in frequency and phase domains from which the controller identifies resonant modes and Q-factors associated therewith; continue to monitor the created heating patterns and store maps of efficiency in the frequency and phase domains until a specified change is detected in at least one Q-factor; and when the specified change in the at least one Q-factor is identified, stop cooking the food load.

A microwave heating method includes following steps: setting multiple microwave heating modes and their corresponding arrangements of resonator; selecting one of the microwave heating modes according to a heating condition; and, disposing an object to be heated and at least one resonator into a heating chamber, and providing a microwave signal to heat the object to heated, wherein a resonance frequency of the at least one resonator is corresponding to a frequency of the microwave signal, and the at least one resonator is arranged in the arrangement corresponding to the selected microwave heating mode. A microwave heating device suitable for the above microwave heating method is also proposed.

A microwave heating method includes following steps: setting multiple microwave heating modes and their corresponding arrangements of resonator; selecting one of the microwave heating modes according to a heating condition; and, disposing an object to be heated and at least one resonator into a heating chamber, and providing a microwave signal to heat the object to heated, wherein a resonance frequency of the at least one resonator is corresponding to a frequency of the microwave signal, and the at least one resonator is arranged in the arrangement corresponding to the selected microwave heating mode. A microwave heating device suitable for the above microwave heating method is also proposed.