A household microwave appliance includes a cooking chamber exposable to microwaves. A mode variation apparatus modifies a field distribution of the microwaves in the cooking chamber, and a microwave leakage sensor detects a microwave leakage radiation exiting from the cooking chamber. The household microwave appliance is designed to vary setting values of the mode variation apparatus, and to set an operating point of the mode variation apparatus based on a quantity of measurement data of the detected microwave leakage radiation resulting from a variation.

A wireless communication system is described which includes a transmitter operable to transmit a transmitted signal, the transmitter having one or more transmitting antennae, a receiver operable to receive a received signal, the receiver having one or more receiving antennae, wherein lattice reduction is used in obtaining, at the receiver, an estimate of the transmitted signal based on the received signal, characterized in that the lattice reduction utilizes a lattice reduction matrix, a decomposed representation of which is transmitted between the transmitter and the receiver.

Provided herein is a cooking apparatus. The cooking apparatus includes a plate forming a cavity, a microwave transmission line to transmit microwaves to the inside of the cavity, and a first metal part connected to one end of the microwave transmission line and extended in one direction so as to be parallel with the plate. Thereby, an antenna having improved efficiency is provided.

An apparatus includes a chamber configured to support a number of quasi-orthogonal resonant modes, and at least one antenna assembly, where the antenna assembly includes an antenna having a radiating element, where (i) the antenna has predominantly linear polarization of radiation defined by a polarization plane, (ii) the radiating element is disposed within the chamber such that the polarization plane is not parallel and not perpendicular to the plane containing a primary axis of the chamber and a central point of the radiating element, and (iii) each antenna is coupled to the chamber through a designated surface of the chamber and coupled to a source of microwave or radio frequency energy external to the chamber having a nominal operating frequency.

A microwave-based heating device is capable of uniformly heating a heating-target object by adjusting a difference between phases of waveguides based on lengths of waveguides so that an electric field distribution rotates over time. The microwave-based heating device includes a chamber having a first space for receiving a heating-target object; waveguides respectively extending in a length direction of side surfaces of the chamber, where each waveguide has a second space through which a microwave travels; and a block member disposed inside each of the chamber and the waveguides to occupy the first space and the second space. At least one waveguide has a different length from a length of each of the other waveguides such that a difference between phases of the microwaves respectively travelling through the waveguides occurs. When the microwaves are applied to the waveguides, an electric field distribution generated in the chamber rotates over time.

A microwave-based heating device is capable of uniformly heating a heating-target object by adjusting a difference between phases of waveguides based on lengths of waveguides so that an electric field distribution rotates over time. The microwave-based heating device includes a chamber having a first space for receiving a heating-target object; waveguides respectively extending in a length direction of side surfaces of the chamber, where each waveguide has a second space through which a microwave travels; and a block member disposed inside each of the chamber and the waveguides to occupy the first space and the second space. At least one waveguide has a different length from a length of each of the other waveguides such that a difference between phases of the microwaves respectively travelling through the waveguides occurs. When the microwaves are applied to the waveguides, an electric field distribution generated in the chamber rotates over time.

A microwave heating method in a multimode cavity based on wedge-shaped dielectric plates includes steps of: optimizing dielectric constants and heights of the wedge-shaped dielectric plates and a bottom material in the multimode cavity, so as to heat arbitrary loads within the multimode cavity; wherein the arbitrary loads involves positions at which the loads are located, different tray dielectric constants and radii, different load dielectric constants and loss angles, and different load shapes for microwave heating simulation; the bottom material refers to a matter of a same material as the wedge-shaped dielectric plates, which covers a bottom of the multimode cavity. The microwave heating method can provides sufficient heating efficiency.

A microwave heating method in a multimode cavity based on wedge-shaped dielectric plates includes steps of: optimizing dielectric constants and heights of the wedge-shaped dielectric plates and a bottom material in the multimode cavity, so as to heat arbitrary loads within the multimode cavity; wherein the arbitrary loads involves positions at which the loads are located, different tray dielectric constants and radii, different load dielectric constants and loss angles, and different load shapes for microwave heating simulation; the bottom material refers to a matter of a same material as the wedge-shaped dielectric plates, which covers a bottom of the multimode cavity. The microwave heating method can provides sufficient heating efficiency.

A microwave oven includes a muffle that includes a plurality of walls and defines an internal cavity for housing food, a radiofrequency supplying assembly that is configured to generate and propagate radiofrequency waves into the internal cavity via an access opening provided on one of the plurality of walls of the muffle, and a mounting flange arranged on an outer side of the muffle in correspondence to the access opening and configured to establish a coupling with the waveguide of the radiofrequency supplying assembly. The radiofrequency supplying assembly includes a radiofrequency generator, and a waveguide coupled to the radiofrequency generator and configured to guide the radiofrequency waves from the radiofrequency generator to the internal cavity.

A food processing machine for processing a food product includes a processing module having a housing with a sidewall, opposing end walls, and a chamber between the end walls and a conveyor extending through the end walls and the chamber and configured to convey the food product through the chamber. A microwave generating device is coupled to the sidewall and configured to generate microwave energy. A waveguide assembly is configured to receive the microwave energy, direct the microwave energy along a waveguide axis, and subsequently direct the microwave energy in a transverse direction that is transverse to the vertical direction through the sidewall and into the chamber such that the microwave energy heats the food products.