A household cooking appliance includes a cooking space and a microwave apparatus which is configured to feed microwaves into the cooking space. The microwave apparatus includes a feed chamber arranged outside of the cooking space and configured to open into the cooking space through an emission opening which is excitable by the microwaves, and a microwave line projecting into the feed chamber and connected galvanically to an electrically conductive wall region of the feed chamber which wall region restricts the emission opening. The feed chamber defines a chamber which is non-resonant for the microwaves.

A device for treating a product with microwaves includes a treatment chamber, in which the product can be transported along a transport path in a transport direction through the treatment chamber, and a microwave radiation device arranged in the treatment chamber, by means of which microwaves coupled into the microwave radiation device can be radiated, which act on the product, wherein the microwave radiation device includes at least one coaxial conductor which protrudes into the treatment chamber, or is arranged therein, with an electrically-conductive internal conductor and an electrically-conductive external conductor, wherein the external conductor, arranged coaxially, surrounds the internal conductor in a spaced manner and includes at least one opening, which enables an emission of microwaves from the coaxial conductor through the opening on to the product.

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.

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.

A solid state microwave module is described. The solid state microwave module includes one or more printed circuit boards (PCBs); a microwave solid state amplifier assembled to the one or more PCBs; an antenna interface assembled to the one or more PCBs; a TEM or semi-TEM transmission line printed on the one or more PCBs and connecting the microwave solid state amplifier to the antenna interface; and four ports printed on the one or more PCBs to couple four respective different portions of microwave signals going through the TEM or semi-TEM transmission line to at least one power meter.

A device fir treating a product with microwaves has a treatment chamber in which the product can be conveyed along a transport track in a transport direction through the treatment chamber, and has a microwave-emitting apparatus, which is arranged in the treatment chamber and by which microwaves coupled into the microwave-emitting apparatus can be emitted, which microwaves impinge upon the product. The microwave-emitting apparatus has at least one coaxial conductor, which protrudes into or is arranged in the treatment chamber and which has an electrically conductive inner conductor and an electrically conductive outer conductor, the outer conductor surrounding the inner conductor at a distance therefrom and in coaxial arrangement and having at least one opening, which enables the emission of microwaves through the opening from the coaxial conductor onto the product. The microwave-emitting apparatus has a plurality of coaxial conductors arranged at a distance from each other in the transport direction, each having at least one opening in the outer conductor. In a coaxial conductor arranged subsequently in the transport direction, the at least one opening is offset transversely to the transport direction with respect to the at least one opening of a preceding coaxial conductor.

Described are apparatuses and methods for heating an object in a cavity by microwave energy. The apparatus includes, in some embodiments, multiple antennas; a microwave source configured to feed the cavity with microwave energy via the multiple antennas; and multiple radiators. Each of the radiators is configured to controllably move so as to couple the source to a respective one of the multiple antennas or decouple the source from the respective one of the multiple antennas.

To provide an electromagnetic wave discharge emission device, a discharger in small size for causing a discharge only by an electromagnetic wave, that can significantly be reduced in length in a longitudinal direction, and configured to emit the electromagnetic wave into a target space based on an output of the supplied electromagnetic wave. The electromagnetic wave discharge emission device comprises an electromagnetic wave oscillator MW configured to oscillate an electromagnetic wave, a controller 2 configured to control the electromagnetic wave oscillator MW, a first substrate 10 provided with a plurality of discharge emission patterns 11 each having a power receiving end 11a on the main surface side, and a second substrate 20 provided with a feed pattern 22 having a power receiving port 21 configured to receive a power of the electromagnetic wave from the electromagnetic wave oscillator MW and a plurality of power feed ends 22a each connected through a via to one of the power receiving ends 11a, a distance on the feed pattern 22 from the power receiving port 21 to each power receiving end 11a of the corresponding discharge emission pattern 11 being equal to one another. Each of the discharge emission patterns 11 is formed in a spiral shape that has at a center thereof the corresponding power receiving end (s) 11a connected to the feed pattern 22 and has a length which corresponds to wavelength of the electromagnetic wavelength supplied to the feed pattern 22.

An apparatus for manufacturing tablets for hot beverage brewing includes a reservoir feeding infusible loose food products, a grinding system for the loose food products to obtain grounds of a given size, a moistening system moistening the grounds to a given moisture content, a mixing and homogenizing system for mixing and homogenizing the grounds to a homogeneous mixture, a weighing system of the homogeneous mixture to obtain a dose of predetermined weight, a forming system forming the dose into a tablet of predetermined volume, an irradiation system for electromagnetic irradiation of the tablet to overheat the particles to a partial baking and/or sintering for compactness and self-supporting ability without an enclosure, and a control system acting on the grinding, moistening, homogenizing, system, forming, and irradiating systems to control particle size, moisture content, homogeneity, weight, volume and compactness parameters of the tablet and change water permeability of the tablet accordingly.

A household cooking appliance includes a cooking space and a microwave apparatus which is configured to feed microwaves into the cooking space. The microwave apparatus includes a feed chamber arranged outside of the cooking space and configured to open into the cooking space through an emission opening which is excitable by the microwaves, and a microwave line projecting into the feed chamber and connected galvanically to an electrically conductive wall region of the feed chamber which wall region restricts the emission opening. The feed chamber defines a chamber which is non-resonant for the microwaves.