79 results about "Microwave cavity" patented technology

The invention discloses a microwave cavity heating structure based on acoustic vibration and a microwave heating homogenization method. Comprising a microwave heating cavity, an acoustic vibration device, a dynamic metal structure, a microwave generator and a temperature sensor, the microwave heating cavity is internally provided with an inner cavity, and the bottom surface of the inner cavity is connected with a plurality of dynamic metal structures which are distributed at equal intervals in an array manner; the acoustic vibration device is arranged on the side wall of the inner cavity and used for generating acoustic vibration to the inner cavity, the microwave generator is arranged on the side wall of the inner cavity and used for injecting microwave energy into the inner cavity to form an electromagnetic field, and the dynamic metal structure generates mechanical vibration under the influence of the acoustic vibration so as to dynamically change the distribution of the electromagnetic field of the inner cavity; and the temperature sensor is arranged at the top of the microwave heating cavity. The problems of hot spots and non-uniform heating in the microwave heating process can be effectively solved, the heating efficiency and quality are improved, and the microwave heating device is suitable for the fields of food processing, material treatment, chemical reaction and the like.

The invention relates to a low-temperature action zone device for an ultralow-temperature cesium atom fountain clock, which is characterized in that a liquid nitrogen Dewar flask is hung in a vacuum cylinder through a plurality of hanging pipes, a cold shield is arranged between the vacuum cylinder and the liquid nitrogen Dewar flask, and a microwave cavity assembly is arranged in the liquid nitrogen Dewar flask; the liquid supplementing and refrigerating device is positioned above the vacuum cylinder, is connected with the liquid nitrogen Dewar flask through a liquid nitrogen pipeline and is used for filling liquid nitrogen into the liquid nitrogen Dewar flask. The hoisting structure of the liquid nitrogen Dewar flask is combined with the automatic liquid supplementing system of the liquid supplementing refrigeration device, so that the temperature stability of a low-temperature action area is improved, and the accurate control of a low-temperature environment is realized. Liquid nitrogen is automatically supplemented through the liquid supplementing refrigeration device, temperature fluctuation caused by manual operation is avoided, and meanwhile accurate tuning of the resonant frequency of the microwave cavity is ensured. And a hoisting structure is combined with a cold shield, so that heat exchange between a low-temperature action area and a normal-temperature system is effectively isolated, heat loss is avoided, and the temperature stability is remarkably improved.

The techniques described herein relate to systems, apparatus, articles of manufacture, and methods for light generation. An example apparatus for ultraviolet (UV) radiation generation includes a microwave cavity comprising an electrodeless UV bulb, the electrodeless UV bulb comprising a bulb fill capable of emitting UV light, a synthesizer configured to generate a microwave signal, and a solid-state amplifier configured to amplify the microwave signal to generate an amplified microwave signal for igniting the bulb fill to emit UV light.

The invention relates to a lunar soil microwave heating effect evaluation method. The method comprises the following steps: establishing a microwave cavity model enclosed by a metal boundary; calculating electric field distribution of the lunar soil according to the magnetic conductivity and the complex dielectric constant of the lunar soil; a plurality of sampling bodies are arranged in the target area, and microwave energy absorbed by each sampling body is calculated according to electric field distribution of lunar soil; determining the specific heat capacity of the lunar soil along with the temperature change, and calculating the temperature change rate in each sampling body according to the microwave energy; calculating the standard deviation and the average value of the temperature change rates of all the sampling bodies, and obtaining a variable coefficient along with the temperature change; and when the temperature of the lunar soil is balanced, judging the microwave heating uniformity of the lunar soil according to the variable coefficient. In the process of analyzing the lunar soil microwave heating effect, starting from the first principle, the characteristic that the specific heat capacity of the lunar soil changes along with the temperature is considered, the physical reality that the lunar soil absorption energy changes along with the temperature in the process of converting the lunar soil absorption energy into the temperature is fitted, and the accuracy of lunar soil microwave heating effect analysis is improved.

This invention discloses a microwave heating device with high-order mode suppression, belonging to the field of microwave heating technology. It includes: a heater comprising a rectangular waveguide and metal ridges; the rectangular waveguide has a microwave cavity extending laterally; two metal ridges are symmetrically arranged front-to-back within the microwave cavity, with a front-to-back spacing between them, and each ridge has a material passage hole extending front-to-back; and two high-order mode suppressors, respectively located at the front and rear ends of the heater, each high-order mode suppressor having a material cavity for the workpiece to be heated to pass through, extending front-to-back and communicating with the material passage hole. This invention features a compact structure, strong electric field, rapid and uniform heating, and protection against high-frequency radiation, preventing harm to operators from microwave spatial radiation and ensuring the safe use of the microwave heating device.

The invention relates to a microwave apparatus (1) for continuous treatment of a flowing fluid medium. It comprises an enclosure (2) made of a microwave-reflective material and internally defining a microwave cavity (3) in which the fluid medium flows along a flow axis (A1); an input waveguide (4) extending along a propagation axis (A2) orthogonal to the flow axis and coupled to an input window (41) provided in the enclosure for propagation of microwaves entering the microwave cavity. The invention is characterised in that it comprises a measurement system for determining a symmetry indicator representing a symmetry of an electric field relative to the flow axis inside the microwave cavity, thus representing a centring of the electric field in the fluid medium. Knowledge of this symmetry indicator advantageously allows the symmetry of the electric field in the fluid medium to be controlled.

The invention provides a microwave phase measurement system based on magneton-photon coupling characteristics. According to the system, an integrated electrode support / GGG / YIG / Pt multilayer structure is embedded in a microwave cavity, and magnetons carry microwave phase information through coupling of the magnetons and photons in the YIG. Magneton precession of the YIG layer causes spin current to be generated in the Pt layer, the spin current is converted into measurable voltage signals through inverse spin Hall effect, and high-resolution phase measurement is realized by means of frequency mixing, coherent detection and the like. The method is high in anti-interference capability, can realize high-sensitivity and low-cost microwave phase measurement, and is expected to be used in the fields of spintronics, microwave measurement, quantum information reading and the like.

An aerosol-generating device for generating an aerosol by microwave heating of an aerosol-forming substrate contained in a substrate portion of a cylindrical aerosol-generating article is provided, the aerosol-generating device including: a microwave generator configured to generate a microwave signal; a cylindrical microwave cavity configured to removably receive at least the substrate portion of the cylindrical aerosol-generating article; and a coaxial feed exciter operatively connected to the microwave generator and coupled to the cylindrical microwave cavity such as to feed the microwave signal into the cylindrical microwave cavity and excite at least one specific transverse magnetic mode or transverse electric mode within the cylindrical microwave cavity when the substrate portion of the cylindrical aerosol-generating article is received in the cylindrical microwave cavity. An aerosol-generating system including the aerosol-generating device and a cylindrical aerosol-generating article including a distal substrate portion containing an aerosol-forming substrate is also provided.

The present invention relates to the technical field of cold atomic clocks and provides a multifunctional microwave cavity for a cold atomic clock, comprising a cavity body and upper and lower end caps disposed at the upper and lower ends of the cavity body, respectively. The multifunctional microwave cavity for a cold atomic clock provided by the present invention can perform operations such as laser cooling, state selection, and detection on atoms located at the center of the cavity body, thereby expanding the microwave cavity from a single microwave excitation function to a multifunctional microwave cavity capable of satisfying all cold atomic clock operations. This improves microwave cavity utilization, significantly reduces the overall volume and weight of the cold atomic clock, and transforms the atomic action region of the cold atomic clock from a separate type to an integrated type, thereby reducing system dead time, significantly minimizing the Dick effect, and simultaneously reducing atomic loss and quantum projection noise.

The invention belongs to the technical field of glass processing, relates to processing of an atomic clock microwave cavity, and relates to a tool and a method for high-precision processing of a large-size thin-wall glass cavity. The two ends of the glass crystal ingot are cut to be flat, and the parallelism of the two end faces after cutting is smaller than or equal to 0.05 mm; a first blank of a barrel-shaped structure is manufactured in the flatly-cut end face through drilling; milling and grinding the first blank to obtain a second blank; and the second blank is polished through the tool, and then the workpiece is obtained. The tool comprises a polishing main shaft, a top roller and a driving mechanism. According to the method provided by the invention, high-precision, high-efficiency and high-reliability processing can be carried out on the large-size thin-wall glass microwave cavity, so that the processing quality of the cavity and the performance of an atomic clock are improved, and the method plays an important role in the aspects of a satellite navigation system, deep space exploration and spacecraft orbit determination, information network synchronization, a national time frequency system and the like.

This invention discloses a linked structure cavity for improving the SPL (Surface Placement) of musical glass, comprising an active device, a microwave cavity, a linked nano-cushion, and a metasurface crystal layer. The active device is disposed on the original glass, and a metasurface crystal layer is horizontally disposed on its end face away from the original glass. A ring-shaped microwave cavity is disposed between the metasurface crystal layer and the original glass, relative to the outside of the active device. The microwave cavity is spaced around the active device and forms a circular region with the metasurface crystal layer and the original glass. A linked nano-cushion is disposed between the metasurface crystal layer and the active device, and the linked nano-cushion and the microwave cavity are configured to not interfere with each other. This multi-dimensional combination of the linked nano-cushion, the microwave cavity, and the metasurface crystal layer forms a strong coupled planar sound field, improving the SPL value of the musical glass. This invention improves the SPL value of musical glass through the multi-dimensional combination of the microwave cavity, the linked nano-cushion, and the metasurface crystal layer.

The invention provides quantum space-time reference integrated measurement equipment, method and system, the equipment comprises a detection device and a control terminal, the detection device comprises a magnetic shielding cylinder, a magneto-optical trap cavity is arranged in the magnetic shielding cylinder, different functional areas are integrated in the magneto-optical trap cavity, and each functional area comprises a cooling cavity in which cooling light and pump light are arranged; the microwave cavity is used for performing Ramsey primary interference after performing initial state preparation on the cold atomic group to obtain a frequency error signal between the output frequency of the local oscillator and the standard frequency; the second-stage interference region is arranged vertically below the free falling outlet of the atoms of the microwave cavity and is used for performing M-Z second-stage interference; the detection area is arranged at the tail end of the detection device and is communicated and connected with the secondary interference area; the control terminal is in communication connection with the detection device. According to the invention, synchronous measurement of time and space reference can be realized, the equipment reference transmission error and the equipment cost are reduced, and the test efficiency of space-time reference information is improved.

The application relates to a low-temperature action zone device for an ultralow-temperature cesium atom fountain clock, which comprises the following steps: a liquid nitrogen Dewar flask is hung in a vacuum cylinder through a plurality of hanging pipes, a cold shield is arranged between the vacuum cylinder and the liquid nitrogen Dewar flask, and a microwave cavity assembly is arranged in the liquid nitrogen Dewar flask; a liquid supplementing and refrigerating device is arranged above the vacuum cylinder, and the liquid supplementing and refrigerating device is connected with the liquid nitrogen Dewar flask through a liquid nitrogen pipeline and used for filling the liquid nitrogen Dewar flask with liquid nitrogen. The hanging structure of the liquid nitrogen Dewar flask is combined with the automatic liquid supplementing system of the liquid supplementing and refrigerating device, the stability of the temperature of the low-temperature action zone is improved, and the precise control of the low-temperature environment is realized. The liquid nitrogen is automatically supplemented through the liquid supplementing and refrigerating device, temperature fluctuation caused by manual operation is avoided, and the precise tuning of the microwave cavity resonance frequency is ensured. The hanging structure is combined with the cold shield, heat exchange between the low-temperature action zone and the normal-temperature system is effectively avoided, heat loss is avoided, and the temperature stability is remarkably improved.

The present application relates to the technical field of small magnetron microwave cavity, and discloses a passive hydrogen atom frequency standard small magnetron microwave cavity.The passive hydrogen atom frequency standard small magnetron microwave cavity comprises a cavity tube and four pole pieces, a sealed microwave resonant cavity is formed in the cavity tube, one coupling ring is arranged on each side of the side surface of the cavity tube, the two coupling rings are respectively used for input and output of microwave signals, the outer diameter of the cavity tube is 111mm, the inner diameter of the cavity tube is 105mm, and the height is 188.5mm; the pole piece is in an arc structure, four pole pieces are arranged in a ring in the sealed microwave resonant cavity, a connecting column is protrudingly arranged on the side of each pole piece away from the center of the plurality of pole pieces, the connecting column is connected to the side wall of the cavity tube, the annular inner diameter surrounded by the four pole pieces is 61.6mm, the annular outer diameter is 67.4mm, the height of the pole piece is 145mm, and the spacing between each adjacent two pole pieces is 3.8mm.The passive hydrogen atom frequency standard small magnetron microwave cavity is light in mass, small in size, and meets the magnetic field environment requirement of hydrogen atom transition of the passive hydrogen atom frequency standard.

The embodiment of the invention discloses a double-loop sapphire oscillation system, and the system comprises a sapphire microwave cavity which is used for carrying out the oscillation of a first microwave signal to obtain a second microwave signal, and carrying out the oscillation of a third microwave signal to obtain a fourth microwave signal; the temperature device is used for providing a working environment for the sapphire microwave cavity; the coupling module is used for coupling the second microwave signal to the first oscillation circuit, coupling the fourth microwave signal to the second oscillation circuit and feeding the first microwave signal and the second microwave signal into the sapphire microwave cavity; the first oscillation circuit is used for obtaining a first microwave signal according to the first input signal and working in a first working mode after oscillation starting according to the first control signal; the second oscillation circuit is used for obtaining a second microwave signal according to a second input signal and working in a second working mode after oscillation starting according to a second control signal; and the frequency mixing module is used for mixing the third microwave signal and the fourth microwave signal to obtain a target microwave signal.

A microwave heat processing apparatus is provided. The microwave heat processing apparatus includes a microwave chamber and a microwave source. The microwave chamber is configured to heat up a thread type object and includes a primary waveguide tube and a microwave absorber. The primary waveguide tube is configured to accommodate the thread type object, in which a tube wall of the primary waveguide tube has an auxiliary opening and a center extension direction does not pass through the auxiliary opening. The microwave absorber is in the primary waveguide tube. The microwave source connects to the primary waveguide tube.

The application provides a single-pole multi-throw coaxial switch with a load end; comprising a shell, a circuit control mechanism, an electromagnetic drive mechanism and a microwave transmission mechanism; a microwave cavity is formed in the base of the shell; the moving spring plate of the electromagnetic drive mechanism is fixed on the armature, the armature is hinged on the base of the shell, and the hinged ends of the armature are provided with attracting ends; the circuit control mechanism realizes the on-keeping or off-current of a plurality of output electromagnet assemblies or a plurality of load electromagnet assemblies in the electromagnetic drive mechanism; the lower end of the first push rod of the microwave transmission mechanism extends into the microwave cavity and is fixedly connected with the first microwave spring plate, and the first spring is sleeved on the first push rod; the lower end of the second push rod extends into the microwave cavity and is fixedly connected with the second microwave spring plate, and the second spring is sleeved on the second push rod; the two ends of the moving spring plate are respectively aligned with the first push rod and the second push rod of the corresponding spring plate assembly. The coaxial switch solves the problems of signal leakage and mutual interference of the hollow port in the use of the high-frequency multi-channel coaxial switch.

The application discloses a method for processing sugarcane seed stalks in batches by microwave through an integrated microwave processing device, which comprises the following steps: setting a microwave cavity in the middle of a conveying belt, setting two high-frequency microwave feeding antennas and two low-frequency microwave feeding antennas in the microwave cavity; laying the sugarcane seed stalks on the conveying belt and conveying them into the microwave cavity at a constant speed for processing; controlling the time of the sugarcane seed stalks in the microwave cavity to be 90-180s; controlling the processing temperature of the sugarcane seed stalks to be 45-55 DEG C; mixing calcium chloride, sodium chloride and water to prepare a spraying liquid; spraying the processed sugarcane seed stalks; collecting the sprayed sugarcane seed stalks, and then air-drying the collected sugarcane seed stalks after standing for 10-20min; then, treating the sugarcane seed stalks under ultraviolet light for 10-15min; and finally, sealing and storing the sugarcane seed stalks. The application is suitable for processing sugarcane seed stalks in batches, and has the characteristics of high efficiency, rapidness and environmental protection.

The invention relates to the technical field of interconnection structures, in particular to an ultra-high-frequency ultra-low-loss chip and transmission line interconnection structure which comprises a transmission line substrate and a microwave structure cavity, a high-frequency chip is bonded to the side edge of the transmission line substrate, and the transmission line substrate and the high-frequency chip which are bonded and consolidated are bonded to the bottom of the microwave structure cavity. The middle position of the bottom surface of the transmission line substrate is provided with a transmission line, the high-frequency chip is communicated with the transmission line through an interconnection structure, the microwave cavity design and the micro-assembly assembling technology are combined, the assembling difficulty is reduced to the maximum extent, the impedance matching of interconnection is improved, in the frequency band of 220-330 GHz, the return loss is smaller than-22 dB, the minimum return loss can reach-28 dB, and the frequency band of 220-330 GHz can reach-28 dB. The insertion loss is less than 0.5 dB, and the minimum insertion loss can reach 0.3 dB.

The invention discloses a cavity structure of MPCVD equipment for producing diamond semiconductors, and the cavity structure comprises a microwave cavity assembly, a main cavity assembly, a lower cavity assembly and a corrugated pipe assembly which are sequentially connected from top to bottom, and the microwave cavity assembly comprises a first water cooling assembly and an air cooling assembly; an objective table assembly is arranged in the main cavity assembly, the lower cavity assembly and the corrugated pipe assembly in a lifting mode and comprises a sample table and a cavity plate, and the sample table is connected with the cavity plate in a sliding mode. According to the invention, an air cooling structure is added, a water and air combined cooling method is used, and the first water cooling assembly and the air cooling assembly arranged in the microwave connection cavity are used for reducing the temperature of the vacuum sealing quartz glass, so that the vacuum sealing quartz glass is prevented from being burnt out by high temperature.

This invention discloses a method for controlling multiple transparent windows based on a coupled-cavity opto-magnetic-mechanical system, comprising the following steps: Step 1: Building a physical model of the coupled-cavity opto-magnetic-mechanical system, including a YIG crystal with a microbridge structure, a microwave cavity, and coupled dual optical cavities; Step 2: The coupled optical cavity and microwave cavity are driven by a strong red detuned optical field and a microwave field, respectively; Step 3: Introducing two weak detection fields at two frequencies to detect the output responses of the two cavity modes; Step 4: Solving for the output spectra of the microwave cavity and optical cavity using the Langevin equations of motion; Step 5: Changing the system coupling parameters to achieve the fabrication of multiple transparent windows, fast and slow light, and Fano resonance phenomena. This invention solves the technical challenge of multiple transparent window coexistence by implementing multiple coupling mechanisms in one system, and utilizes multi-band transparent windows to achieve discrete signal processing, supporting multi-band quantum storage and multi-channel photonic information processing, thereby improving the efficiency and capacity of quantum information processing.

A system for determining shale rock maturity includes a dual mode microwave cavity configured to receive a shale sample, a heating system configured to heat the shale sample to a range of different temperatures using microwave emissions of a first frequency, and a measuring system configured to measure a complex permittivity of the shale sample using a microwave signal of a second frequency.

A method and systems for enhancing the performance of vacuum ultra-violet lamps. The method includes providing a gas to a microwave cavity chamber. The microwave cavity chamber has a length along a central axis of the microwave cavity chamber, a first end along the central axis, and a second end opposite the first end along the central axis. The method further includes providing excitation energy to the microwave cavity chamber and generating a plasma in the microwave cavity chamber. A compensator magnet is disposed toward the first end of the microwave cavity chamber to provide a compensation magnetic field at the first end of the microwave cavity chamber.

The present application relates to a kind of microwave cavities for cold atom microwave clock, belong to cold atom clock field, comprising: main cavity, rectangular waveguide, upper end cover, lower end cover and frequency tuning component;The end cover of main cavity is fixed and sealed with main cavity, the end cover of rectangular waveguide is fixed and sealed with rectangular waveguide itself using laser welding, fundamentally avoid the unreliability problem caused by indium wire sealing, no need to carry out aging test again, shorten the development time of microwave cavity again.The frequency tuning of main cavity is realized using tuning component, the frequency tuning of rectangular waveguide is realized using tuning screw, through double tuning mode and laser welding synergistic effect, no longer need to repeatedly disassemble and grind debugging, further shorten the development time of microwave cavity, simplify assembly and tuning process, be conducive to realization standardization, realize industrialization development.The present application solves the tuning problem of the frequency of cold atom clock microwave cavity, also effectively solves the low reliability, tuning process complex problem caused by using indium wire sealing.

The application provides a quantum space-time reference integrated measurement device, method and system, wherein the device comprises a detection device and a control terminal, the detection device comprises a magnetic shielding cylinder, a magneto-optical trap cavity is arranged in the magnetic shielding cylinder, and different functional areas are integrated in the magneto-optical trap cavity; the functional areas comprise: a cooling cavity, wherein a cooling light and a pumping light are arranged; a microwave cavity, which is used for performing Ramsey first-order interference on a cold atom group after initial state preparation to obtain a frequency error signal between a local oscillator output frequency and a standard frequency; a second-order interference area, which is arranged vertically below an atom free-fall outlet of the microwave cavity and is used for performing M-Z second-order interference; a detection area, which is arranged at the end of the detection device and is connected with the second-order interference area; and the control terminal is in communication connection with the detection device. The application can realize synchronous measurement of time and space references, reduce reference transmission error and equipment cost of the device, and improve the test efficiency of space-time reference information.

According to the angular velocity measuring device and method provided by the invention, the sapphire microwave cavity with high symmetry and low loss characteristics is configured, two microwaves in a degenerate echo wall mode with completely symmetrical propagation characteristics can be excited, and meanwhile, due to the high Q value characteristic of sapphire, the energy loss is low and the frequency stability is high in the signal propagation process; in the rotation process, microwaves in two degenerate modes are propagated in the rotation direction, the forward direction and the reverse direction of the cavity respectively, the linear speed brought by rotation of the cavity enables the effective propagation speed of the forward mode to be synchronously increased, the effective propagation speed of the reverse mode to be synchronously reduced, and the difference between the propagation speeds can be determined through the frequency difference. Therefore, the angular velocity of the rotation of the cavity can be measured with high precision.

The techniques described herein relate to systems, apparatus, articles of manufacture, and methods for light generation. An example apparatus for ultraviolet (UV) radiation generation includes a microwave cavity comprising an electrodeless UV bulb, the electrodeless UV bulb comprising a bulb fill capable of emitting UV light, a synthesizer configured to generate a microwave signal, and a solid-state amplifier configured to amplify the microwave signal to generate an amplified microwave signal for igniting the bulb fill to emit UV light.

The invention relates to a quantum computing device comprising: - a microwave cavity (MC) having a separate or coincident input port (IP) and output port (OP); - a superconducting electronic device (SD) capacitively coupled to the microwave cavity and configured to support a chain of 2N Majorana modes (MM1 – MM4, MM2', MM3'), where N is a positive integer; and - coupling means for applying microwave excitations between each pair of adjacent Majorana modes in the chain. It also relates to a method for realizing a braiding quantum gate on a qubit using a quantum computing device. Figure for the abstract: Fig. 4

The invention provides a vertical graphene array and a preparation method thereof, and the preparation method comprises the steps: placing a reactor in a microwave irradiation region of a microwave generation device, and forming a plasma generation core region in a fixed region of the reactor; placing the substrate in a plasma generation core area of a reactor, fixedly supporting the substrate by a supporting sheet, vacuumizing the reactor, and introducing argon; wherein the supporting sheet is formed by pressing a molecular sieve; and starting the microwave generation device, introducing a carbon source after plasma is generated in the reactor, and carrying out vapor deposition reaction to obtain the vertical graphene array. By designing the sizes of the microwave cavity and the quartz tube and using the molecular sieve tablet as the substrate supporting piece, the growth rate of the vertical graphene is improved.

In one embodiment, systems and methods include an electrospray device for atomizing fluids comprising a body defining a resonant microwave cavity, wherein the body comprises a radio frequency inlet configured to inject a radio frequency signal received from a power source into the resonant microwave cavity, wherein the resonant microwave cavity is configured to to amplify a voltage of the radio frequency signal. The device further comprises a field concentrating pole disposed within the resonant microwave cavity configured to concentrate the amplified voltage at a first end of the field concentrating pole to form an electric field. The device further comprises a nozzle disposed at the first end of the field concentrating pole and a fluid supply line configured to provide a fluid disposed within the field concentrating pole and fluidly connected to the nozzle, wherein the fluid supply line is fluidly connected to a fluid source.