27 results about "Cylindrical waveguide" patented technology

The invention relates to a transmitting-receiving integrated sound sensing device and system based on a seven-core optical fiber. High-sensitivity ultrasonic multi-point detection under self-transmitting and self-receiving is achieved. The device comprises a seven-core optical fiber; a cylindrical waveguide is prepared in the middle fiber core of the seven-core optical fiber, cantilever beam structures are supported and connected to the cylindrical waveguide at the positions of four fiber cores which are symmetrical by taking the middle fiber core as the center in the seven-core optical fiber, and the end surface of the cylindrical waveguide is coated with a photoacoustic material; the cylindrical waveguide is used for transmitting a pulse laser signal to the photoacoustic material, the photoacoustic material is used for receiving the pulse laser signal and generating an ultrasonic signal for detection, and the cantilever beam structure is used for receiving an acoustic signal.

The invention relates to the technical field of forward wave oscillators, in particular to a K-band TE11 mode microwave oscillator. Comprising a cylindrical waveguide, and sequentially comprises a cut-off transition section, an interaction section and an output transition section, the cathode structure is mounted in the cut-off transition section; the anode waveguide structure comprises a plurality of slotted circular ring metamaterial units which are arranged in the interaction section at intervals in the axial direction, are linked through a metal cylinder to form a serial structure and are connected to the wall of the cylindrical waveguide to form a double-spiral anode slow wave structure; electron beams generated by the cathode structure rotate in the axial direction under the action of an external electromagnetic field, interact with each other in the anode slow wave structure to excite forward waves in a TE11 mode, and radiate outwards along an output transition section; the collector is arranged in the output transition section. On the basis of realizing a Gaussian beam TE11 mode, a traditional mode conversion structure is omitted, the structure is more compact, and light weight and miniaturization are easy to realize.

The present application relates to the technical field of acoustic metamaterials, and specifically relates to a multi-order asymmetric acoustic vortex generator and a generation method based on acoustic metamaterials, which comprises a phased structure I, a phased structure II, a three-dimensional mirror structure, a three-dimensional cylindrical waveguide base, a signal input structure and a quantitative evaluation structure; the phased structure I, the phased structure II and the three-dimensional mirror structure are coaxially arranged in the three-dimensional cylindrical waveguide base in sequence, the phased structure I and the phased structure II are sound wave incidence ends, and the three-dimensional mirror structure is a sound wave transmission end; the other end of the three-dimensional cylindrical waveguide base is provided with the quantitative evaluation structure, which is used for detecting the generation quality of the multi-order asymmetric acoustic vortex, and can realize the asymmetric generation of-2~+2 order acoustic vortexes in a wideband range, and has the characteristics of high mode purity, high acoustic energy transmission efficiency and structural integration, so as to solve the difficulties faced by the prior art in the collaborative realization of multi-order, wideband and asymmetric acoustic vortexes.

The application relates to a kind of twist near-field radiation heat transport controller and method based on cylindrical waveguide, belong to the technical field of radiation heat transport regulation.It includes platform, transmitting end, waveguide structure and receiving end, symmetrically arranged transmitting end and receiving end are installed on the platform, and transmitting end and receiving end are matched with waveguide structure.The application can realize active adjustment of non-contact heat transport completely by relying on system structure geometric characteristics without applying any external field (electric field, magnetic field and velocity field);The design has the advantages of large adjustable range, high precision, etc.;The application is based on the low-loss long-range heat transport characteristics of cylindrical waveguide, and an additional transport channel is opened for heat exchange between objects by means of cylindrical surface mode, and the propagation loss is low, which provides technical possibility for non-contact heat regulation between transmitting end and receiving end.

The invention discloses a gyrotron structure based on a gradual change output section and a second harmonic electromagnetic wave generation method thereof. The gyrotron structure comprises an open type gyrotron resonator with a three-section cavity structure, the open type cyclotron resonator comprises a cut-off section cavity of an inclined annular open type metal structure, an interaction section cavity of an open type metal cylindrical waveguide structure and an output section cavity of an inclined gradual change annular open type metal structure. The cut-off section cavity, the interaction section cavity and the output section cavity are sequentially connected end to end from left to right. According to the invention, three cavity structures which are combined in sequence are adopted to form the open-type cyclotron resonator, so that high-power electromagnetic waves can be generated at 263 GHz, and the open-type cyclotron resonator has the characteristic of second harmonic operation; the open-type rotary resonance device with the three-section cavity structure is composed of an inclined annular open-type metal structure cut-off section, a cylindrical waveguide structure interaction section and an inclined gradual change annular open-type metal structure output section which are sequentially connected end to end from left to right. The gyrotron structure is simple in design and low in cost, and solves the problem of low output efficiency caused by the fact that second harmonic terahertz wave band electromagnetic waves generated by an existing gyrotron structure are difficult to be compatible with high beam-wave interaction efficiency and a suppression competition mode.

The present invention discloses a metasurface device with reconfigurable acoustic field control based on geometric phase, which is composed of an array of subwavelength double-layer microstructures; the double-layer microstructure can achieve tunable acoustic geometric phase, and is composed of a cylindrical waveguide and two subwavelength double-layer microstructures with opposite artificial topological charges. ξ The invention is composed of a phase gradient meta-grating PGM, which are PGM-1 and PGM-2 respectively; the double-layer microstructure can realize the adjustment of the linear and continuously changing acoustic geometric phase by rotating the angle θ of PGM-2, satisfying the relationship that the present invention realizes arbitrary adjustment of the transmission phase by rotating the geometric angle of each microstructure, and can realize diversified sound field control functions such as beam deflection, focusing and separation, thereby realizing a new type of reconfigurable acoustic metasurface device; the present invention has great application potential in sound field function control devices.

A connecting means is provided that has a simple structure, which can suppress deterioration in the transmission characteristics of radio waves and can reliably fix a dielectric waveguide and a waveguide together. [Solution] The device comprises a dielectric waveguide (100) having an inner layer and an outer layer with different dielectric constants, a cylindrical waveguide (200) into which at least a portion of the dielectric waveguide (100) can be inserted, and a pin (300) that penetrates the waveguide (200) and the dielectric waveguide (100) and is configured to suppress transmission loss due to reflected waves at the portion where the dielectric waveguide (100) is inserted into the waveguide (200).

The present disclosure relates to an augmented reality eyeglass lens having a waveguide and a method of manufacturing such an eyeglass lens having a waveguide. The eyeglass lens comprises a first lens portion and a second lens portion having a cylindrical waveguide therebetween; and the cylindrical waveguide having cylindrical concentric opposing surfaces defining a first cylindrical interface with the first lens portion and a second cylindrical interface with the second lens portion, and wherein the cylindrical waveguide is transparent and comprises a central waveguide core having a transparent medium at the first and second cylindrical interfaces.

The invention discloses a crossed transmission system based on a periodic dielectric waveguide. The crossed transmission system comprises a transmission waveguide unit and a gradient resonant cavity unit, the transmission waveguide units are arranged in a cross mode, and the gradual change type resonant cavity units are distributed and arranged outwards with the cross center of the transmission waveguide as a starting point. According to the crossed transmission structure based on the periodic dielectric waveguide, aiming at the requirement of high integration level of the modern photon technology, a compact periodic cylindrical waveguide structure is adopted to construct a crossed unit, and additional cylinders with different radiuses are added to form a gradually-changed resonant cavity structure; the special structure of the resonant cavity enables the optical signal to present the characteristic of high localization in the cross area, the optical signal is well constrained and guided, the interaction between the optical signal and the surrounding environment is reduced, and the overall transmission loss and crosstalk effect are reduced. The invention provides a new direction for the development of optical integrated circuits, and has the potential to realize higher performance and wider application in the fields of optical communication, optical storage and the like.

The invention relates to the technical field of nondestructive testing, and discloses a multi-mode mechanical wave optimal mode selection method, system, equipment and medium for buried component detection, and the method comprises the steps: building a buried component cylindrical waveguide model based on an elastodynamic theory, solving the frequency dispersion characteristic of a multi-mode mechanical wave, and calculating the optimal mode of the buried component; calculating to obtain a frequency dispersion curve and a modal feature vector of the mechanical wave propagating in the waveguide; setting a defect boundary and obtaining defect parameters, and calculating to obtain a boundary reflection coefficient; analyzing the distribution proportion of the energy of each mode in the axial direction and the radial direction, and analyzing the vibration energy distribution of each mode; and based on the boundary reflection coefficient and the vibration energy distribution, screening the optimal mode of the mechanical wave. According to the method, the boundary reflection coefficient for quantitatively evaluating the modal sensitivity is provided, blindness of traditional experience selection is avoided, and the signal-to-noise ratio of a detection signal and the intensity of defect echoes are remarkably improved by selecting the optimal modal with the high boundary reflection coefficient and low attenuation.

The application discloses a spring resonator-based optical fiber ultrasonic sensor and a preparation method thereof, and comprises a single-mode optical fiber and a spring resonator. The single-mode optical fiber comprises a fiber core and a single-mode optical fiber end face, is used for receiving incident light, reflects on the single-mode optical fiber end face, obtains a first reflection light path, and transmits adjacent incident light to the spring resonator. The spring resonator comprises a ring-shaped base, a spring, a cylindrical waveguide and a micro disk, is used for receiving the adjacent incident light transmitted by the single-mode optical fiber, reflects on the end face of the micro disk, and obtains a second reflection light path. When an acoustic wave acts on the spring resonator, the optical path difference between the first reflection light path and the second reflection light path changes, an optical signal modulation is generated, and the acoustic wave is sensed. The application is used for solving the technical problems that the existing optical fiber ultrasonic sensor is too large in size, is not high in sensitivity and is complex in a preparation process, so that a small-sized, high-sensitivity and easy-to-manufacture optical fiber ultrasonic sensor is developed.

The application provides a cavity filter coupler, and relates to the technical field of communication equipment.The cavity filter coupler comprises a cylindrical waveguide base body, the inside of the cylindrical waveguide base body has a cavity, and a plurality of through holes that are in communication with the cavity are formed in the peripheral wall of the cylindrical waveguide base body; a resonant piece is connected with the cylindrical waveguide base body and is located in the cavity; and at least two feeders are arranged at one end of the cylindrical waveguide base body in the axial direction and at the other end of the cylindrical waveguide base body in the axial direction.The cavity filter coupler provided by the application solves the problems of single function, poor use performance and difficulty in miniaturization design of a filter or a coupler in the prior art.

The invention belongs to the technical field of semiconductor lasers, and particularly relates to a vertical cavity surface emitting laser and a preparation method thereof. The laser comprises a heat sink, a bottom-emitting VCSEL chip and an optical microstructure array which are sequentially arranged from bottom to top, the bottom-emitting VCSEL chip is connected with the heat sink through flip-chip bonding, and the optical microstructure array is arranged below a substrate of the bottom-emitting VCSEL chip; the bottom-emitting VCSEL chip comprises a substrate and an epitaxial layer arranged on the substrate, the epitaxial layer is provided with an etching groove, the etching groove is arranged in the epitaxial layer, and the etching groove penetrates through part of the epitaxial layer to form a cylindrical waveguide. According to the laser, the chip output power inversion point is improved by improving the heat dissipation characteristic of the chip, and then the chip output power is increased.

An optical system, comprising: a cylindrical waveguide having concentric inner and outer surfaces that define a common cylindrical axis; and an input optical device arranged to receive light from an image source and direct the light into the cylindrical waveguide such that, at each point of incidence, all the light rays from the same pixel of the image source are incident on the surface of the cylindrical waveguide at the same angle with respect to the surface normal and at the same angle with respect to a plane orthogonal to the cylindrical axis, whereby the coupled-in light maintains its angular direction as it propagates along the cylindrical waveguide. The optical system can be used to provide an optical display device that can form part of a head-mounted display.

This application discloses a waveguide polarizer and its electronic device, which relates to the field of polarizer technology, including: a cylindrical waveguide and a corrugated gradient body on its inner wall. The unique corrugated gradient body of the application combined with the cylindrical waveguide can accurately control the phase difference between the orthogonal mode components to 90° without introducing complex geometric mutations, achieving TE 21 The ripple gradient body smoothly transitions between the cross-sections of the input and output ports, effectively eliminating reflection losses caused by interface abrupt changes. The phase delay of the orthogonal components is precisely controlled across a wide bandwidth, ensuring stable circularly polarized output. The modular nature of this structure allows for expansion to higher-order modes and other frequency bands, providing a universal solution for millimeter-wave communications, radar feed systems, and vacuum electronics.

The invention provides a broadband output circuit for a W-band klystron and a bandwidth optimization method. The broadband output circuit comprises an output resonant cavity, an output waveguide and a filter arranged between the output resonant cavity and the output waveguide. The filter comprises at least one cylindrical waveguide section; the cylindrical waveguide section is used for expanding the output bandwidth of the W-band klystron. Through the output circuit, the W-band klystron can realize obvious bandwidth expansion.

Provided is an electromagnetic wave generation device with which it is possible to determine the cause of an abnormality occurring in the interior thereof.　The present invention comprises: a negative electrode (1); a first positive electrode (2) which is disposed facing the negative electrode and through which electrons can pass; a cylindrical waveguide (3) that is disposed on the side of the first positive electrode opposite from the negative electrode and guides electromagnetic waves; an output window (30) that is disposed at the end portion of the waveguide on the side opposite from the first positive electrode and outputs electromagnetic waves; a first current sensor (41) that detects current data pertaining to an electron beam emitted from the negative electrode; a second current sensor (42) that detects current data pertaining to the electron beam traveling within the waveguide; and an abnormality determination device (60) that determines an internal abnormality on the basis of the current data detected by the first current sensor and the current data detected by the second current sensor.

An antenna feed network includes an asymmetric annular waveguide coupled between first and second cylindrical waveguides. The asymmetric annular waveguide is configured to transform a linearly polarized signal propagating in the first cylindrical waveguide into a circularly polarized signal propagating in the second cylindrical waveguide.

An optical system comprising: a cylindrical waveguide having concentric inner and outer surfaces defining a common cylindrical axis; and input optics arranged to receive light from an image source and pass the light into the cylindrical waveguide such that, at each point of incidence, all light rays originating from the same pixel of the image source are incident on the surface of the cylindrical waveguide at the same angle relative to the surface normal and at the same angle relative to a plane orthogonal to the cylindrical axis, so that the incoupled light maintains its direction angle as it propagates along the cylindrical waveguide. The optical system can be used to provide an optical display device that can form part of a head-mounted display.

The present invention discloses a method for generating an asymmetric acoustic vortex by using a double-layer metasurface. The maximum-order topological core for transmitting an acoustic vortex in a cylindrical waveguide is l<supgt;M< / supgt>. Two layers of metasurfaces are designed in the cylindrical waveguide such that the "intrinsic topological core" and relationship are satisfied and it is ensured that the number of sub-units designed in the metasurface with the "intrinsic topological core" is even, thereby realizing the generation of an asymmetric acoustic vortex. When an incident plane wave is incident from one side of the waveguide, the two layers of metasurfaces ensure the effective conversion of the acoustic vortex topological core, generating an efficient acoustic vortex field. When the incident plane wave is incident from the other side of the waveguide, due to the acoustic vortex diffraction effect in the metasurface with the "intrinsic topological core", it has an "extrinsic topological core" with reflection characteristics, which hinders the effective conversion of the acoustic vortex topological core and generates an inefficient acoustic vortex field. The present invention provides a feasible technical means for realizing the asymmetric generation and propagation of an acoustic vortex field, and has certain application prospects in particle manipulation and information communication of acoustic orbital angular momentum.

This invention discloses a waveguide polarization adjustment device for a Ku-band transceiver channel, comprising a polarization adjustment rotor capable of adjusting the waveguide polarization angle of the Ku-band transceiver channel; a common waveguide with the polarization adjustment rotor rotatably mounted inside; a drive mechanism capable of driving the polarization adjustment rotor to rotate; and a positioning component capable of detecting and positioning the rotation angle of the polarization adjustment rotor. The polarization adjustment rotor includes a cylindrical waveguide channel, a first annular groove, a polarizing plate, and a second annular groove. The first annular groove is formed at one end of the polarization adjustment rotor, and the second annular groove is formed at the other end. A cylindrical waveguide channel is hollow inside the polarization adjustment rotor, and a polarizing plate is centrally mounted within the cylindrical waveguide channel. By continuously rotating the polarization adjustment rotor 360 degrees within the common waveguide channel, the polarizing plate inside the cylindrical waveguide channel deflects synchronously, achieving precise fine-tuning of the electromagnetic wave polarization angle arbitrarily from 0° to 360°.

The utility model relates to a quantum chip three-dimensional packaging structure, and the structure comprises a chip groove which is used for placing a chip; and the cable groove is vertically arranged in the chip groove, and when the chip and the cable are connected, the chip and the cable are in air coupling connection. According to the quantum chip three-dimensional packaging structure provided by the embodiment of the utility model, the cable and the quantum chip are vertically arranged, and a distance is reserved between the conductor in the cable and the quantum chip, so that a cylindrical waveguide is formed, signal transmission is carried out in an air coupling mode, and high insulativity of the cable can be realized in a certain space; signal crosstalk between cables can be effectively reduced.

The invention relates to an antenna array arrangement strategy determination method and device, equipment, a storage medium and a program product. The method comprises the following steps: acquiring a hand hole parameter corresponding to a hand hole of target equipment, and acquiring a corresponding waveguide parameter according to the hand hole parameter; obtaining a cylindrical waveguide eigenvalue for the target waveguide mode according to the waveguide parameter, and obtaining a reference azimuth angle of the antenna array according to the cylindrical waveguide eigenvalue; obtaining an adjustment parameter of the reference azimuth angle, and adjusting the reference azimuth angle according to the adjustment parameter until the antenna array after the reference azimuth angle is adjusted meets a preset electromagnetic field distribution condition, thereby obtaining a target azimuth angle; and generating an arrangement strategy of the antenna array according to the target azimuth angle. By adopting the method, the field distribution uniformity of the antenna array can be improved.

Provided is an electromagnetic wave generation device capable of determining the cause of an abnormality that has occurred internally.　The present invention includes: a negative electrode (1); a first positive electrode (2) that is disposed facing the negative electrode and through which electrons can pass; a cylindrical waveguide (3) that guides electromagnetic waves and is disposed on the opposite side of the first positive electrode from the negative electrode; an output window (30) that outputs electromagnetic waves and is disposed at the opposite end of the waveguide to the first positive electrode; a first current sensor (41) that detects current data of electron beams emitted from the negative electrode; a second current sensor (42) that detects current data of electron beams traveling in the waveguide; and an abnormality determination device (60) that determines an internal abnormality on the basis of the current data detected by the first current sensor and the current data detected by the second current sensor.

The invention discloses a glass waveguide surface plasma resonance sensor. The sensor comprises a glass substrate with a cylindrical waveguide core layer and two grooves, wherein the two grooves are respectively positioned on two symmetrical sides of the cylindrical waveguide core layer and are respectively provided with a nano metal film. The manufacturing method of the sensor is simple, the dual-channel nano metal film generates a surface plasma resonance effect along with the change of an external environment, and different metal films absorb light with different specific wavelengths. The sensor is small in crosstalk and high in practicability, measurement of multiple environmental parameters can be achieved, high-sensitivity rapid measurement of the environmental temperature and the environmental refractive index is achieved through high-sensitivity response of the characteristic absorption peak wavelength of the transmission spectrum trough to external environmental refractive index disturbance, and a good sensing effect is achieved.

The invention provides a cavity filtering coupler, and relates to the technical field of communication equipment, and the cavity filtering coupler comprises a cylindrical waveguide substrate, the interior of the cylindrical waveguide substrate is provided with a cavity, and the peripheral wall of the cylindrical waveguide substrate is provided with a plurality of through holes communicating with the cavity; the resonance part is connected with the cylindrical waveguide substrate, and the resonance part is located in the cavity; and at least one feed part is arranged at one end of the cylindrical waveguide substrate in the axial direction, and at least one feed part is arranged at the other end of the cylindrical waveguide substrate in the axial direction. According to the cavity filtering coupler provided by the invention, the problems that an independent filter or coupler in the prior art is single in function, poor in use performance and not beneficial to miniaturization design of a filtering coupling device are solved.

The application discloses a rectangular waveguide filter, and the filter comprises a double-layer hollow waveguide, and four rectangular resonant cavities are formed by two hollow waveguides in each of upper and lower layers; adjacent hollow waveguides in the same layer are communicated through a first coupling hollow waveguide serving as a coupling window, so that the filter structure is more compact, the loss is lower, and the filter is more suitable for application in a modern microwave and millimeter wave circuit system; adjacent hollow waveguides in the upper and lower layers are communicated through a hollow rectangular waveguide, a hollow cylindrical waveguide, a third coupling hollow waveguide and a second coupling hollow waveguide serving as coupling windows; the coupling windows arranged in this way not only do not affect the coupling of the main mode TM 110 , but also can inhibit the coupling of high-order modes TM 210 , so that the effect of keeping high selectivity and extending the filter stopband is achieved.