12 results about "Microwave frequency range" patented technology

The present invention discloses a method for preparing cobalt-based composite particles with adjustable multilayer gaps, comprising the following steps: first, preparing a Co core; second, coating with SiO2; third, coating with Fe; fourth, coating with Co; and fifth, removing the Fe intermediate layer. This method utilizes structural design of the particles to increase the material's microwave absorption loss, resulting in composite particles with excellent microwave absorption properties. Furthermore, the gaps between the spherical shells can be tailored to the microwave frequency range in which the material is intended to operate, achieving enhanced absorption and effectively improving the material's microwave absorption loss performance.

A non-invasive analyte sensor includes at least one transmit antenna and at least one receive antenna. A transmit circuit is electrically connectable to the at least one transmit antenna, where the transmit circuit is configured to generate a transmit signal in a radio or microwave frequency range of the electromagnetic spectrum. A receive circuit is electrically connectable to the at least one receive antenna. A trigger mechanism is associated with the non-invasive analyte sensor that triggers an analyte reading by the non-invasive analyte sensor.

The invention relates to the field of LED luminescent materials, solves the problems of harsh synthesis conditions and high production cost of narrow-band green fluorescent powder in the prior art, and provides a narrow-band green fluorescent powder preparation method based on composite nucleation and an LED package. The method comprises the following steps: weighing raw materials according to a first preset ratio; preparing a nucleating agent according to a second preset ratio; uniformly mixing the pretreated raw materials with the nucleating agent to obtain a mixture; putting the mixture into a double-layer crucible; a reaction atmosphere is established in the reaction furnace, and the pressure in the reaction furnace is controlled to reach the target pressure; applying a microwave field in the reaction furnace according to a preset microwave frequency range to sinter the mixture, heating to a first target temperature interval, and preserving heat to obtain a sintered material; and quickly cooling the sintered material to obtain the narrow-band green nitrogen oxide fluorescent powder. The preparation difficulty and production cost of beta-Sialon: Eu are reduced, and the method is suitable for industrial production.

This invention claims protection for a method for selectively heating multilayer materials using microwaves based on a preferred frequency, comprising the following steps: S1, constructing a microwave heating system model based on the structure, dielectric properties, and geometric model of the microwave heating cavity of the multilayer material; S2, dividing a preset microwave frequency range into several frequency steps, obtaining temperature distribution data of each layer of the material at each frequency through multiphysics simulation, and establishing a frequency-temperature distribution correlation database; S3, calculating the temperature difference between the target layer and the non-target layer at different frequencies, and constructing an interlayer temperature difference control function; S4, selecting a preferred frequency sequence that maximizes the temperature difference between the target layer and the non-target layer through the interlayer temperature difference control function, and dynamically adjusting the frequency sequence according to the interlayer temperature difference threshold; S5, sequentially outputting microwave frequency control signals according to the preferred frequency sequence to perform time-segmented frequency-varying heating of the multilayer material, obtaining the result that the target layer is selectively heated while the temperature of the non-target layer remains at a low level.

The invention relates to a quantum voltage step width measuring method and device. The method comprises the steps of determining a microwave frequency range and a microwave power range of a microwave source according to a voltage step width requirement of a Josephson junction array in a programmable Josephson quantum voltage standard implementation process; according to the microwave power range, determining a round power range of each scanning round in the multi-round scanning process of the microwave source; performing multi-round scanning on the microwave source based on the scanning function according to the microwave frequency range and the round power range of each scanning round; wherein the scanning function is a function representing scanning time and quantum voltage step measurement precision; and determining the quantum voltage step width of the Josephson junction array according to the round scanning result of each scanning round. By adopting the method, the scanning efficiency of the microwave source can be improved, and the observation precision of the quantum voltage step is ensured.

A parametric amplifier for amplifying an input signal includes a resonator comprising a Josephson junction. The Josephson junction comprises a first superconductor component, a second superconductor component and a semiconductor component. The semiconductor component is configured to enable coupling of the first and second superconductor components. The parametric amplifier further comprises a gate electrode configured to apply an electrostatic field to the semiconductor component of the Josephson junction for tuning the parametric amplifier. Such parametric amplifiers are useful for amplifying signals in the microwave frequency range. Tuning the junction by electrostatic gating may allow for improved scalability compared to tuning using magnetic flux. Also provided are the use of the parametric amplifier to amplify a signal; and a method of amplifying a signal.

A device for producing a plasma, configured to generate a plasma from a reaction gas, wherein the device for producing a plasma comprises a microwave generator operating at a given source frequency comprised within a microwave frequency range and a waveguide coupled to the microwave generator and configured to guide an excitation wave. The device also includes a dielectric tube extending longitudinally along an axis of extension, the dielectric tube being configured to receive the plasma, such as the dielectric tube passes right through the waveguide; and a reaction gas injection unit configured to introduce the reaction gas into the dielectric tube.

The invention relates to a terahertz dual-comb spectrum stabilization system, including an optical loop for coupling a first optical frequency comb signal (OFCS) to a second OFCS; and a frequency mixer for performing frequency mixing on the coupled first OFCS and second OFCS to generate a dual-comb signal. A local oscillator signal end of the frequency mixer is connected to a multi-chain frequency multiplication chain, the multi-chain frequency multiplication chain is used for performing frequency multiplication processing on a radio frequency signal, a local oscillator frequency in terahertz frequency range is generated the local oscillator frequency in terahertz frequency range is respectively mixed with the first OFCS and the second OFCS in the frequency mixer, and two down-converted OFCSs are generated in microwave frequency range. One line of comb teeth of the two down-converted OFCSs are respectively locked to obtain a stable multi-heterodyne dual-comb spectrum.

An analyte sensor that detects an analyte via spectroscopic techniques using frequencies in the radio or microwave frequency range of the electromagnetic spectrum. The analyte sensor is configured to permit adjustment of the position(s) of one or more transmit components and / or the position(s) of one or more receive components. Adjusting position (or the like) as used in the description and claims includes changing an angle of the transmit component(s) and / or the receive component(s), and / or moving the transmit component(s) and / or the receive component(s) in one or more X, Y, Z directions, and / or changing a shape of the transmit component(s) and / or the receive component(s), and any combinations thereof.

A distributed electromagnetic interrogation system may include a wellbore, a wellbore casing positioned in the wellbore, and a plurality of conformal helical antennas distributed along the wellbore casing. The plurality of conformal helical antennas may be configured to operate in a radio or microwave frequency range and to propagate electromagnetic radiation along an external propagating mode of the wellbore casing. An interrogator may be coupled to receive and process data from the plurality of conformal helical antennas.

Various embodiments provide a generator unit for generating microwave electromagnetic energy and radiofrequency electromagnetic energy for being supplied to an electrosurgical instrument. The generator unit comprises a first coaxial port configured to be connected to a first coaxial cable, the first coaxial port including a first inner connector and a first outer connector separated by a first dielectric material. The generator unit comprises a second port configured to be connected to an electrical line configured to convey a direct current and / or the radiofrequency electromagnetic energy. The generator unit comprises a first microwave source configured to generate the microwave electromagnetic energy in a first microwave frequency range for being supplied to the first coaxial port. The generator unit comprises a radiofrequency source configured to generate the radiofrequency electromagnetic energy in a first frequency range offset from the first microwave frequency range, the radiofrequency source including a first output and a second output. The radiofrequency source is configured to be coupled to the first coaxial port and the second port such that the first output is electrically connected to the first outer connector, and the second output is electrically connected to the second port. Some other embodiments provide an electrosurgical instrument and an electrosurgical system.

The invention discloses a microwave radiation and fluorescence enhancement method for a vehicle-mounted quantum magnetic compass, and the method comprises the steps: designing the width of a microstrip line, and calculating the width size of the microstrip line through the type of a given known material and the thickness of a dielectric constant substrate; the method comprises the following steps: designing a gap ring resonance structure, determining a required microwave frequency range under a given magnetic field, and calculating size information of each parameter of the gap ring resonance structure according to an intermediate value of the microwave frequency range; coupling oscillation of the microwave and the resonance structure is designed; a uniform metal film layer with a smooth mirror surface is prepared through a deposition process, so that reflection collection of a fluorescence signal and a pump laser light source is realized, and the fluorescence collection efficiency is improved. According to the invention, microwave intensity enhancement is realized, a uniform microwave field is provided in a certain area so as to realize synchronous driving of a color center ensemble, fluorescence collection enhancement can be realized at the same time, and fine tuning on structural size parameters can adjust different working frequencies through simulation software.