A method for matching an impedance of a system comprising a cavity and one or more feeds to an impedance of one or more sources of electromagnetic radiation irradiating a plurality of frequencies into the cavity via the feeds, comprising: determining a plurality of s-parameter of the system for a frequency band; determining the system impedance based on the s-parameters; and modifying the system impedance according to the difference between the impedance of the system and the impedance of the source.

Devices and methods for RF heating of food, using techniques which allow uniformity and/or controlled non-uniformity.

Devices and methods for RF heating of food, using techniques which allow uniformity and/or controlled non-uniformity.

A microwave oven having an enclosed cavity is provided including an RF signal generator; a solid state amplifier having a coplanar waveguide transmission line, the amplifier coupled to the RF signal generator for receiving and amplifying the RF signals generated thereby; an intermediate transition including: a metal boundary having a first section and a second section having different dimensions than that of the first section; a first dielectric disposed in the first section; a second dielectric disposed in the second section; and a center conductor extending from a first side of the substrate to a second side of the substrate through the first and second dielectrics, where a first end of the center conductor is connected to an output of the amplifier; and an antenna coupled to a second end of the center conductor for receiving the amplified RF signals and introducing electromagnetic radiation into the cavity.

A microwave oven having an enclosed cavity is provided including an RF signal generator; a solid state amplifier having a coplanar waveguide transmission line, the amplifier coupled to the RF signal generator for receiving and amplifying the RF signals generated thereby; an intermediate transition including: a metal boundary having a first section and a second section having different dimensions than that of the first section; a first dielectric disposed in the first section; a second dielectric disposed in the second section; and a center conductor extending from a first side of the substrate to a second side of the substrate through the first and second dielectrics, where a first end of the center conductor is connected to an output of the amplifier; and an antenna coupled to a second end of the center conductor for receiving the amplified RF signals and introducing electromagnetic radiation into the cavity.

Apparatuses and methods for applying EM energy to a load are provided. The apparatuses and methods may include at least one processor configured to receive information indicative of energy dissipated by the load for each of a plurality of modulation space elements. The processor may also be configured to associate each of the plurality of modulation space elements with a corresponding time duration of power application, based on the received information. The processor may be further configured to regulate energy applied to the load such that for each of the plurality of modulation space elements, power is applied to the load at the corresponding time duration of power application.

Apparatuses and methods for applying EM energy to a load are provided. The apparatuses and methods may include at least one processor configured to receive information indicative of energy dissipated by the load for each of a plurality of modulation space elements. The processor may also be configured to associate each of the plurality of modulation space elements with a corresponding time duration of power application, based on the received information. The processor may be further configured to regulate energy applied to the load such that for each of the plurality of modulation space elements, power is applied to the load at the corresponding time duration of power application.

Devices and methods for RF heating of food, using techniques which allow uniformity and/or controlled non-uniformity.

Devices and methods for RF heating of food, using techniques which allow uniformity and/or controlled non-uniformity.

The present invention related to devices and methods that use returned power (RP) measurements during microwave energy delivery to perform one or more functions. For example, microwave devices and systems with one or more features to measure the returned microwave power. One or more measurements of the returned microwave power may be used to obtain information about one or more of: antenna shape, system status and system performance. One or more measurements of the returned microwave power shaping elements may also be used to obtain information about one or more properties of the target material. The invention also discloses devices and methods for delivering microwave energy to a variety of target materials to achieve a variety of desired microwave effects.