10 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 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 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 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 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 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.

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.

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.