631 results about "Microwave cavity" patented technology

An electro-optical system for exchanging quantum information between optical qubits and including a superconductive microwave cavity; an electro-optical material: a superconductive qubit circuit formed on the electro-optical material including a superconductive qubit; a dipole antenna, formed on the electro-optical material for directly coupling the superconductive qubit to the superconductive microwave cavity; an optical input for receiving input optical photons; a microwave input for receiving input microwave photons; and an optical output for outputting modulated optical photons, wherein a frequency and a phase of the optical photon is modulated with a state of the superconducting qubit by the dipole antenna.

The invention is a method and associated instrument for microwave assisted chemistry. The invention includes the steps of directing a continuous flow of fluid through a microwave cavity while applying microwave radiation to the cavity and to the continuous flow of materials therein, monitoring the pressure of the fluid in the cavity; and cooling the fluid in the cavity when the pressure exceeds a predetermined setpoint pressure.

A microwave heating apparatus is designed to improve distribution of the microwaves introduced into a multi-mode microwave cavity for heating or other selected applications. The microwave heating apparatus includes a microwave signal generator and a waveguide to convey microwave power to the cavity. A perforated metal plate disposed within the cavity encloses a volume adjacent to the waveguide opening, forming a leaky multimode subcavity. Through multiple processes of reflection, transmission, diffraction, and scattering, the leaky subcavity serves to smooth the microwave power distribution in the near-field region adjacent to the waveguide to better disperse the energy throughout the main applicator cavity. A more uniform level of microwave power is thereby applied to the workpiece.

A microwave apparatus and system that monitors the amount of food products within a cavity and adjust the microwave power provided to the cavity. The apparatus and system uses a product sensor system and a movement sensor system to accurately determine the product load in the microwave cavity. A computer controller, based on the product load information provided by the product sensor system and the movement sensor system, operates to adjust the amount of power provide to the microwave cavities by the microwave transmitters.

A variable frequency microwave heating apparatus designed to allow modulation of the frequency of the microwaves introduced into a multi-mode microwave cavity for heating or other selected applications. A field-perturbing tool is disposed within the cavity to perturb the microwave power distribution in order to apply a desired level of microwave power to the workpiece.

A system and method for determining loading of a filter having a first dielectric constant with a material having a different dielectric constant, is disclosed. The filter is contained within a metallic container forming a microwave cavity, and microwave or RF energy is created within the cavity and changes in the cavity microwave response are monitored. The changes in cavity microwave response are related to filter loading. In a preferred embodiment, the microwave energy includes multiple cavity modes thereby allowing determination of spatial distribution of the contaminant material loading. In one embodiment, the microwave cavity response includes a shift in frequency of a resonant mode. Alternatively, the microwave cavity response includes a shift in quality factor Q of a resonant mode. The microwave cavity response may include a shift in amplitude or peak width of the microwave's signal at resonance.

A method is disclosed for carrying out microwave assisted chemical reactions. The method includes the steps of placing reactants in a microwave-transparent vessel, placing the vessel and its contents into a microwave cavity, applying microwave radiation within the cavity and to the vessel and its contents while concurrently externally cooling the vessel conductively.

The invention provides a composite energy field heating device. The composite energy field heating device comprises a microwave heating device and a hot-pressing tank, wherein the microwave heating device comprises a microwave generator, a microwave cavity and a microwave local shielding part; the microwave generator is used for sending microwaves into the microwave cavity; a wave absorbing material is arranged in the microwave cavity; the microwave local shielding part is positioned in the microwave cavity, and is used for covering the outer surface of the wave absorbing material; the microwave local shielding part is composed of a shielding microwave region and a transmission microwave region; the transmission microwave region comprises one or more seams, so that microwaves in the microwave cavity can enter the wave absorbing material through the seams for being absorbed; the microwave cavity is integrally arranged in the hot-pressing tank; a ventilating window or a ventilating wall which consists of one or more metal honeycomb plates is arranged on the microwave cavity; and the ventilating window or the ventilating wall can be used for enabling smooth air flow inside and outside the microwave cavity in the hot-pressing tank while shielding the microwaves. The composite energy field heating device can truly realize consistent temperature on all parts in the wave absorbing material, so that high-quality cured products are provided for the aviation and aerospace fields.

Systems and methods for generating relatively cool microwave plasma are disclosed. The present invention provides a microwave plasma nozzle that includes a gas flow tube through which a gas flows, and a rod-shaped conductor that is disposed in the gas flow tube and has a tapered tip near the outlet of the gas flow tube. A portion of the rod-shaped conductor extends into a microwave cavity to receive microwaves passing in the cavity. These received microwaves are focused at the tapered tip to heat the gas into plasma. The microwave plasma nozzle also includes a vortex guide between the rod-shaped conductor and the gas flow tube imparting a helical shaped flow direction around the rod-shaped conductor to the gas flowing through the tube. The microwave plasma nozzle further includes a mechanism for electronically exciting the gas and a shielding mechanism for reducing a microwave power loss through the gas flow tube.

An electro-optical system for exchanging quantum information between optical qubits and including a superconductive microwave cavity; an electro-optical material; a superconductive qubit circuit formed on the electro-optical material including a superconductive qubit; a dipole antenna, formed on the electro-optical material for directly coupling the superconductive qubit to the superconductive microwave cavity; an optical input for receiving input optical photons; a microwave input for receiving input microwave photons; and an optical output for outputting modulated optical photons, wherein a frequency and a phase of the optical photon is modulated with a state of the superconducting qubit by the dipole antenna.

The invention provides a microwave heating device. The microwave heating device comprises a microwave generator, a microwave cavity and a microwave local shielding part; the microwave generator sends microwaves into the microwave cavity; the microwave cavity is used for placing a wave sucking material; the microwave local shielding part is positioned in the microwave cavity, and is used for covering the outer surface of the wave sucking material; the microwave local shielding part consists of a microwave shielding area and a microwave passing area; and the microwave passing area includes one or more gaps, so that the microwaves in the microwave cavity can enter the wave sucking material from the gaps to be absorbed. The microwave heating device, provided by the invention,can perform fixed-point and / or fixed-direction heating for the wave sucking material.

Method for determining loading of a filter. The filter has a first dielectric constant. The filter becomes loaded with contaminant material that has a second dielectric constant. The filter, such as a diesel particulate filter, is contained within a metallic enclosure forming a microwave cavity. The method includes establishing microwave energy in the cavity and monitoring changes in the cavity microwave response, the changes being related to filter loading.

Systems and methods for controlling a power distribution in a microwave cavity are disclosed. The present invention provides a system that includes a microwave source and a pair of isolators that dissipate retrogressing microwaves that travel toward the microwave source. The isolators are connected to the microwave source. The system also includes a microwave cavity having a pair of inlets disposed on opposite sides of the microwave cavity, a pair of waveguides operatively connected to the inlets to the isolators, respectively; a pair of non-rotating phase shifters operatively connected to the waveguides and the isolators, respectively; a pair of circulators operatively connected to the waveguides and being configured to direct the microwaves to the pair of non-rotating phase shifters, respectively. A power distribution within the microwave cavity is controlled by operation of at least one of the pair of non-rotating phase shifters.

The invention discloses a method for preparing a multiwalled carbon nanotube through microwave enhanced fast pyrolysis of biomass and / or carbonaceous organic waste. The method comprises the following steps: biomass, carbonaceous organic waste, a mixture of the biomass and carbonaceous organic waste or a mixture of the biomass and carbonaceous organic waste uniformly mixed with a microwave absorbent is placed in a reaction vessel in a microwave cavity; an inert gas is introduced into the reaction vessel until an oxygen-free environment is formed; the microwave input power is adjusted to be higher than 500w, and the reaction vessel is heated to 400-1,500 DEG C for a pyrolytic reaction; the multiwalled carbon nanotube is obtained after the reaction. The method for preparing the multiwalled carbon nanotube is cheap and easy, the prepared carbon nanotube is curly, has the mean diameter of 3 nm-200 nm, can be applied to the fields of composites, electrode materials, catalyst preparation and the like and has a broad application prospect.

The invention relates to a method for pumping a rubidium bubble for outputting standard frequency by a lamp pump rubidium gas laser and a rubidium atomic clock. The method comprises the following steps of: adopting a filtered rubidium gas electrodeless lamp as a pumping light source for pumping a rubidium gas atom in an atom steam chamber, realizing distribution quantity conversion and then forming a lamp pump rubidium gas laser under the action of a laser resonant cavity; carrying out laser pumping on the rubidium bubble arranged in a microwave cavity by utilizing the lamp pump rubidium gas laser and detecting the transition probability of the pumped rubidium atom for generating transition by generating interaction with a microwave field in the microwave cavity by utilizing the lamp pump rubidium gas laser; and locking microwave frequency fed in the microwave cavity according to the detected transition probability and locking the microwave frequency fed in the microwave cavity on clock transition frequency of the atom. In the embodiment of the invention, because the frequency of the lamp pump rubidium gas laser still operates on a rubidium transition spectral line broadening spectrum in an unlocking state, even if the frequency of the lamp pump rubidium gas laser is unlocked, the lamp pump rubidium gas laser can be rapidly locked on needed laser frequency.

Method for determining loading of a filter. The filter has a first dielectric constant. The filter becomes loaded with contaminant material that has a second dielectric constant. The filter, such as a diesel particulate filter, is contained within a metallic enclosure forming a microwave cavity. The method includes establishing microwave energy in the cavity and monitoring changes in the cavity microwave response, the changes being related to filter loading.

The characteristics are: adsorption of organic substances in waste water and regeneration of active carbon are all proceeded in a microwave irradiating regenerating unit, active carbon is granular, humidity is controlled in 35-55 percent, stuffing quantity is 1 / 3-4 / 5 of volume of reactor, microwave frequency is 2450 MHz or 915 MHz, power is 0.5-64 kw, temp. is increased to 800-1200 deg.C and kept 3-5 minutes, total irradiating time is 15 minutes. The microwave irradiating regenerating unit consists of magnetron, microwave cavity resonantor and reactor, in top of which water control valve and vapour exit are set on, and there is a blow head in the reactor and sample connection and water exit on bottom of the reactor, alkali solution absorbing tank connected to vapour exit and gas adsorption column.

The present invention discloses a miniaturized rubidium atomic frequency standard cavity-cell system, wherein, a microwave cavity cylinder is made from high magnetic permeability material; the microwave cavity cylinder is sleeved with a heating cylinder; a pump light incident port of the heating cylinder is also provided with a convex lens which gathers and transmits rays emitted by a rubidium spectral lamp into a microwave cavity; a C field coil is directly wound on a dielectric cylinder arranged between the microwave cavity cylinder and an absorption cell; a cusp on the tail part of a light-filtering cell is concentrated at the center of a circular plane at the end of the cell; a cusp on the tail part of the absorption cell is concentrated at the edge of a circular plane at the end of the cell; a photocell and a snap-off diode are fixed on the end face of the inner wall of a cavity end cover which can be movably fixed. The present invention has no machinery regulating rod inside the cavity, uses an intracavity frequency doubling mode, adopts a cylindrical TE111 mode and a dielectric filling method to get rid of the complex structure of a magnetic shield cylinder in the prior art, and reduces the volume of the cavity-cell system. As the pump light incident port of the heating cylinder is provided with the convex lens to increase the light intensity of pump light, the performance of the cavity-cell system is guaranteed. A mobile photoelectric component is adopted for cavity frequency fine adjustment, which is convenient for debugging and cannot cause field form distortion.

Microwave plasma nozzle array systems and methods for configuring the microwave plasma nozzle arrays are disclosed. The microwaves are transmitted to a microwave cavity in a specific manner and form an interference pattern that includes high-energy regions within the microwave cavity. The high-energy regions are controlled by the phases and the wavelengths of the microwaves. A plurality of nozzle elements is provided in the array. Each of the nozzle elements has a portion partially disposed in the microwave cavity and receives a gas for passing therethrough. The nozzle elements receive microwave energy from one of the high-energy regions. Each of the nozzle elements include a rod-shaped conductor having a tip that focuses the microwaves and a plasma is then generated using the received gas.

The present invention provides microwave plasma nozzle array systems (10, 70, 230, and 310) and methods for configuring microwave plasma nozzle arrays (37, 99, and 337). The microwaves are transmitted to a microwave cavity (323) in a specific manner and form an interference pattern (66) that includes high-energy regions (69) within the microwave cavity (32). The high-energy regions (69) are controlled by the phases and the wavelengths of the microwaves. A plurality of nozzle elements (36) is provided in the array (37). Each of the nozzle elements (36) has a portion (116) partially disposed in the microwave cavity (32) and receives a gas for passing therethrough. The nozzle elements (36) receive microwave energy from one of the high-energy regions (69). Each of the nozzle elements (36) includes a rod-shaped conductor (114) having a tip (117) that focuses on the microwaves and a plasma (38) is then generated using the received gas.

The invention discloses a rubidium atom frequency standard digital phase locked frequency multiplier. The input terminal of the digital phase locked loop is connected with the output terminal of the rubidium atom frequency standard 10MHz voltage control crystal oscillatory as the output terminal of the frequency multiplier. The output terminal of the digital phase locked loop is connected with the output terminal of the microwave oven amplifier which is connected with the output terminal of the step matching circuit. The output terminal of the step matching circuit as the output terminal of the frequency multiplier is connected with the input terminal of the rubidium atom frequency standard microwave cavity. The phase detector and the digital frequency synthesizer are integrated by AD 9956. The invention adopts digital synthesizer as the fractional divider in which a digital phase locked loop is inserted, sets and modulate the fractional frequency division ratio of the digital synthesizer through the single chip computer thus enabling the direct fractional frequency multiplying and frequency modulation of the frequency multiplier. The invention with a simple structure, high degree of integration, high purity of the spectrum, low phase noise, small stray and high degree of digitalization is easy to modulate and can be used to produce miniaturized rubidium atom frequency standard.

The invention discloses a superconducting quantum bit chip, comprising a quasi-one-dimensional network chain structure layout superconducting quantum bit array and a manipulating and reading microwavecircuit, wherein each mesh unit comprises n qubits, and m (m and n are natural numbers, n>m>=2) shared qubits between adjacent networks are used for interconnection between mesh units; Each superconducting qubit in the mesh unit is coupled to the same coplanar superconducting microwave cavity for interconnection of qubits in the network. Each qubit is coupled to a coplanar superconducting microwave cavity and further coupled to a coplanar microwave transmission line, and is connected to an external circuit for qubit state reading. The present application can effectively prevent the possibility of qubit interconnection breakpoints, greatly improve interconnection reliability, increase the flexibility of error correction coding design, effectively reduce the complexity of qubit manipulationand reading circuits, and has an important scientific research and industrial application prospect.

A measurement device for measuring a thickness of a film layer over a substrate utilizes a microwave source and a resonant cavity having an open side. A microwave signal is introduced at a first end of the resonant cavity with the open side against a surface measurement sample having a film layer over a substrate, and an output signal detector senses the output power of the signal at a far end of the resonant cavity. A processor uses a difference in the resulting resonant frequency of the cavity from that using a substrate without the film layer to determine the thickness of the film layer.

A Terahertz wave radiation source belongs to the technical field of Terahertz wave. The basic structure comprises a microwave source, a connecting wave guide and a Terahertz wave generator. The Terahertz wave generator works in a vacuum state in a tube, and mainly comprises a cathode for emitting electrons, a focusing electrode, a microwave input wave guide, a microwave cavity, an electron beam drifting and bunching pipe, an extraction electrode, a thick film capacitor, a thin film radiating antenna, an electron beam focusing magnet and a pole shoe. The invention has a simple structure, the output power and efficiency greatly exceeding that of the prior Terahertz wave generator, is suitable for large-scaled production, and has wide application prospect in the fields, such as material detection, human body imaging, component analysis, and the like.

The present invention discloses a coherent microwave-radiation cold atomic clock; and an ion pump is connected with a vacuum catheter which is connected with a microwave cavity; a light window is fixed in the microwave cavity by quartz glass and three reflective mirrors; a pair of anti-Helmholtz coils and a pair of Helmholtz coils are fixed on the microwave cavity; a pair of rectangular coils are fixed on the microwave cavity; a magnetic shielding system is connected with a vacuum system; semiconductor laser provides captive light and beams of pump-back light; a semiconductor laser on the vertical cavity surface provides a plurality of beams of captive light; a voltage-controlled crystal oscillator is connected with a frequency synthesizers connected with a signal receiver and processor; the semiconductor laser on the vertical cavity surface is connected with the microwave cavity; a photoelectric detector and a microwave-power receiver are connected with the signal receiver and processor connected with the voltage-controlled crystal oscillator as well as the semiconductor laser on the vertical cavity surface. The present invention is characterized in that the structure is compact and the size is small, and has good stability, high accuracy as well as good applicability.

A miniaturized instrument and method of using electron spin resonance spectrometry for measuring the degradation of lubricating fluids, and the like, that includes continuously passing a sample of such fluid through a resonating RF microwave cavity resonator during the application therethrough of a uniform slowly varying uniform magnetic field that is rapidly modulated and measuring the resulting phase modulation or amplitude modulation thereof to derive an electron spin resonance signal that directly senses the molecular changes in the fluid sample resulting from fluid degradation during operation of the vehicle, such as peroxy radicals in vehicle engine oil and the like.

A sensor comprising: a dielectric waveguide for guiding a microwave signal; and a dielectric reflector at an end of the dielectric waveguide to cause formation of a sensing field beyond an outer surface of the dielectric reflector.