105results about How to "High gain" patented technology

A broadband omni-directional bicone antenna. The antenna can comprise conductive surfaces of conical voids provided within a solid dielectric structure. The outside surface of the solid structure can support a radio frequency (RF) lens geometry operable for beam forming. The beam forming can modify the elevation pattern of the electromagnetic radiation from the bicone antenna. The solid dielectric structure may be machined or molded from a single piece of material. The conical voids provided within the solid structure can be metallized to provide conductive bicone radiators. The outer surface beam shaping lenses can be zoned or continuous and can provide elevation patterns with increased gain, cosecant squared falloff, or various other patterns. The beam shaping lens may be formed from any low-loss dielectric. Alternatively, the lens may be formed from a less dense material such as dielectric foam that can support radial conductive beam forming vanes.

The invention provides a curved surface polarization torsion reflecting surface and an antenna using the same, and belongs to the technical field of antennas. The curved surface polarization torsion reflection surface comprises a curved surface dielectric plate, and a metal bottom plate and an electromagnetic metasurface which are respectively arranged on the outer side and the inner side of the curved surface dielectric plate; the electromagnetic metasurface is formed by periodically arranging a plurality of single-layer electromagnetic metasurface units. The single-layer metasurface unit with the polarization torsion function is conformal on the curved surface, so that the technical problems that a traditional multi-layer planar polarization torsion structure is complex to process, curved surface conformal is difficult, and the performance is deteriorated after conformal are solved. The reflecting surface is preferably a paraboloid, so that the incident wave polarization torsion is realized, and the spherical wave can be converted into the plane wave to improve the antenna gain. The metasurface unit keeps good cross polarization reflection performance within the wide incidence angle range of 0-40 degrees, is suitable for curved surface conformal design, can be integrally formed through 3D printing, and is easy and convenient to machine and stable in performance.

The invention discloses a differential derivative structure circuit based on three-coupling transformation and an amplifier, and relates to the technical field of amplification circuit design. The differential derivative structure circuit comprises a three-coupling inductance network and N output parts. Through a three-coupling transformation mode, power supply of a main amplifier tube and an auxiliary amplifier tube in a differential derivative structure formed by connecting MOS tubes in parallel is integrated into an inductance matching network, so that homologous coupling of the main amplifier tube and the auxiliary amplifier tube on a radio frequency signal path is realized, physical isolation and independent bias control are also realized on a direct current path, and the power supply efficiency is improved. Therefore, a resistor does not need to be used, excessive use of a capacitor is avoided, loss caused by self impedance of the capacitor and ground parasitic capacitance loss are reduced, gain is greatly improved, extra area occupation caused by the capacitor and the resistor is effectively inhibited, and thermal noise introduced by the resistor is eliminated by utilizing the characteristic of low impedance of inductive coupling. Therefore, post-stage noise is effectively suppressed, and the noise coefficient is reduced.

This invention discloses a broadband circularly polarized integrated feed transmission array antenna covering the entire Ka-band, comprising an array surface and an integrated feed. The phase center of the integrated feed coincides with the focal point of the array surface, illuminating the array surface perpendicularly and forming a 45-degree angle with the array surface in the horizontal direction. The array surface comprises multiple array elements of different sizes arranged linearly. Each array element includes two orthogonally arranged first and second dielectric substrates, which have the same height but different thicknesses. The integrated feed comprises a stacked first and second PCB board. A substrate integrated waveguide is disposed on the first PCB board with coupling slots, and a substrate integrated waveguide cavity and annular metal patches surrounding the substrate integrated waveguide cavity are disposed on the second PCB board. This invention achieves a wide axial ratio bandwidth and gain bandwidth, and has the advantages of low profile, light weight, easy fabrication, and low cost.

The invention discloses a quasi-single-mode circular waveguide conical horn antenna, a radar and a communication device. The quasi-single-mode circular waveguide conical horn antenna comprises a circular waveguide section and a conical horn section. Conductor loss is reduced by remarkably increasing the diameter of the circular waveguide, and axial periodic annular grooves are formed in the inner wall of the circular waveguide to form a spatial mode filter and a selective attenuation high-order mode, so that high radiation efficiency and high mode purity are realized at the same time in a millimeter wave frequency band. And the conical horn section adopts an index profile to realize high-directionality radiation. The antenna structure effectively solves the technical problems of large loss and impure mode in a millimeter wave high-frequency band in the traditional design.

The application provides an X-band broadband high-gain radar metasurface antenna and a design method thereof. The metasurface antenna comprises, from top to bottom, a metasurface layer, an intermediate metal layer and a lower microstrip feed line layer. The metasurface layer comprises at least one metasurface unit. An asymmetric chamfer structure is designed on each metasurface unit. A center fork-shaped slot is arranged at the center of each metasurface unit, and four embedded parasitic branches are arranged at four side edges, respectively. Rectangular coupling slots corresponding to each metasurface unit are arranged on the intermediate metal layer. Feed lines corresponding to each metasurface unit are arranged on the lower microstrip feed line layer. The design method provided in the application can improve the design efficiency.

The embodiment of the application relates to the technical field of communication, and discloses an antenna array and a communication device, the antenna array comprises a bearing base body, a waveguide antenna unit, a choke component and a feeding structure, the waveguide antenna unit comprises a plurality of first antenna elements and a plurality of second antenna elements, the first antenna element comprises a first rectangular waveguide cavity and a first radiation aperture arranged on the first rectangular waveguide cavity, the second antenna element comprises a second rectangular waveguide cavity and a second radiation aperture arranged on the second rectangular waveguide cavity, and the choke component is arranged on the waveguide antenna unit. In the above manner, the embodiment of the application can effectively constrain electromagnetic waves to propagate in a specific path, can significantly improve energy transmission efficiency compared with an open radiation structure, effectively suppresses array interference, and provides a high-performance antenna for a 72-78 GHz frequency band communication system.

The application discloses a high-isolation dual-radiation-mode dual-frequency filtering antenna, and relates to the technical field of antennas of wireless communication terminals; the high-isolation dual-radiation-mode dual-frequency filtering antenna comprises a first dielectric substrate to a fourth dielectric substrate which are sequentially arranged from bottom to top; a pair of differential feeding lines arranged on the lower surface of the first dielectric substrate; an intermediate metal surface arranged between the first dielectric substrate and the second dielectric substrate; a pair of feeding extension branches arranged between the second dielectric substrate and the third dielectric substrate; a circular patch arranged between the third dielectric substrate and the fourth dielectric substrate; an upper metal surface and a ring-shaped patch arranged on the upper surface of the fourth dielectric substrate; a feeding probe vertically penetrating the center of each dielectric substrate; and a plurality of groups of metalized short-circuit through holes; the application utilizes the resonant characteristics of the structure itself and electromagnetic mixed coupling effects to obtain dual-frequency dual-band filtering responses; and adopts a feeding mode combining differential feeding and probe feeding and orthogonal mode excitation to realize high isolation between the dual-frequency bands.

This invention discloses a high-sensitivity frame synchronization algorithm for DVB-S2 signals, belonging to the field of communication signal processing. The method performs FFT transformation on the received signal, pre-calculates the FFT conjugate values ​​of all possible PLSC synchronization header sequences, performs fully matched correlation operations in the frequency domain, and combines this with Doppler spectral line shift search to achieve high-sensitivity frame header detection. This invention is applicable to software processing platforms such as GPUs and maintains a high detection probability even under low signal-to-noise ratio and large frequency offset conditions, significantly improving the frame synchronization performance of DVB-S2 signals.

The application discloses a millimeter wave flat plate slot array antenna with a filtering function, and relates to the technical field of radio frequency communication. The copper-based micro coaxial line-quasi-planar waveguide transition structure is connected with the staggered vertical layout cross-coupled millimeter wave filter, and is integrated with the quasi-planar waveguide feed power division network to realize a three-dimensional quasi-planar low-loss integrated feed circuit, and the feed circuit excites the high-mode flat plate slot antenna array through a coupling slot. The application utilizes the multi-layer metal plane and vertical design capability of electrochemical additive technology, breaks through the key problems of low-process-complexity low-loss interconnection integrated transition interface, low-loss miniaturized filtering structure and array antenna remaining limited special-shaped physical space integrated, and meets the actual application requirements of miniaturization and integration of the millimeter wave radio frequency communication system.

The invention provides a gallium nitride-based semiconductor laser with a gradient radiation recombination coefficient waveguide layer, which is characterized in that a lower waveguide layer and an upper waveguide layer are respectively a gradient radiation recombination coefficient lower waveguide layer and a gradient radiation recombination coefficient upper waveguide layer; and a fitting curve of In ion strength distribution or In atom concentration distribution and a fitting curve of radiation recombination coefficient distribution of the waveguide layer on the gradient radiation recombination coefficient both meet any function distribution of GaussAmp, InvsPoly and Hill in an SIMS test. A fitting curve of In ion strength distribution or In atom concentration distribution and a fitting curve of radiation recombination coefficient distribution of the waveguide layer under the gradient radiation recombination coefficient both meet BiDoseResp function distribution in an SIMS test. According to the invention, carriers, quantum recombination and a light field are efficiently localized, the laser gain is improved, the carriers and the light field are efficiently localized in an active layer (quantum well), meanwhile, non-radiative recombination and absorption loss of a waveguide region are inhibited, and the threshold current, slope efficiency and reliability are further improved.

This invention relates to the field of circuit hardening technology, and provides a voltage-controlled oscillator (VCO) circuit and phase-locked loop (PLL) circuit that are resistant to single-event transients. Addressing the issue that traditional three-mode relaxation oscillator (VCO) circuits are unsuitable for low-voltage conditions, especially when the power supply voltage drops to around 0.8V, this invention employs six oscillation branches coupled into three large oscillation loop circuits to improve loop gain. Furthermore, by combining bias circuits, comparators, and voting circuits for each path, the problem of increasing nonlinearity is avoided. This achieves a combination of large oscillation loops, bias circuits, and a three-mode VCO architecture, resulting in a VCO circuit that maintains high-frequency stable operation under ultra-low voltage conditions such as 0.8V, thus achieving a single-event transient resistance effect, especially at low voltages of 0.8V.

The embodiment of the invention provides a low-noise broadband SerDes receiver analog front end, method and equipment, and belongs to the field of integrated circuit design. The broadband SerDes receiver analog front end comprises an input terminal, a continuous time linear equalizer, a variable gain amplifier and a trans-impedance amplifier which are connected in sequence. The continuous time linear equalizer and / or the variable gain amplifier comprise / comprises at least one reverse coupling peaking inductance structure; the transimpedance amplifier comprises a low-impedance path noise shunting structure; the reverse coupling peaking inductance structure of the variable gain amplifier is mutually coupled with an inductor in the low-impedance path noise shunting structure of the trans-impedance amplifier to form a three-coupling inter-stage feedback structure. According to the invention, the problems of high noise, limited bandwidth and difficult consideration of gain and power consumption in the prior art are effectively solved, and the high-performance and low-power-consumption receiver analog front end supporting 100Gbps PAM4 signal transmission is realized.

The application discloses a radio frequency chip integrated with an RC circuit on a chip, which comprises a substrate, an epitaxial layer, an active region arranged on the epitaxial layer, a plurality of resistance-capacitance combination structures arranged between a gate of the active region and an input metal pad on the epitaxial layer, resistance and capacitance of the resistance-capacitance combination structure being connected in parallel, and the gate of the active region being connected to the input metal pad through the resistance-capacitance combination structure. The radio frequency chip integrated with the RC circuit on the chip integrates the RC circuit in the chip, and the gain and robustness of a radio frequency power device at low and high frequencies are improved.

The invention discloses a low-dropout linear voltage stabilizing circuit, which is characterized by comprising an error amplifier, a frequency compensation circuit, a feedback loop and a power device, the output of the error amplifier is cascaded with the power device to form a circuit main loop; the feedback loop is used for providing a feedback signal reflecting the change of the output voltage of the power device, and the frequency compensation circuit adopts a power tube structure with a pseudo ESR resistor to realize frequency compensation of a main loop of the circuit together with the feedback loop; the error amplifier adopts two-stage circuits, one end of the first-stage circuit is connected with a reference signal, the other end of the first-stage circuit is connected with a feedback signal of the feedback loop, and the two signals are compared and input to the second-stage circuit in a current form; and the second-stage circuit adopts a feedforward coupled AB output stage structure, so that rail-to-rail output of the output voltage is realized, the magnitude of the current provided by the power device to the outside is controlled, and the output voltage is stable.

Techniques are provided for radio frequency (RF) sensing using a single wireless device. An example method for determining a distance to an object with RF sensing includes transmitting, on a wireless device, an RF signal with a transmit channel, receiving, on the wireless device, a leakage signal with a receive channel at a first time, such that the leakage signal is based on the RF signal, receiving, on the wireless device, a reflection signal with the receive channel at a second time, such that the reflection signal is based on the RF signal reflected from the object, and determining the distance to the object based at least in part on a difference between the first time and the second time.

This invention provides a beamformer-based feed design method. By utilizing a pattern synthesis method based on Fourier transform, the excitation amplitude and phase of each array element are obtained through inverse synthesis. The obtained excitation amplitude and phase of each array element are then assigned to that element. Full-wave simulation of the array is performed in electromagnetic simulation software to obtain the array's radiation pattern, which is compared with the desired feed radiation pattern. If deviations exist, the excitation amplitude and phase can be adjusted until the overlap with the desired feed radiation pattern reaches the target. This invention achieves nearly 90% efficiency after illuminating the reflector, far exceeding the efficiency of conventional feeds illuminating reflectors. Furthermore, different excitation coefficients can be flexibly constructed for different frequencies, achieving high-precision approximation of the ideal delta function across a wide frequency range. Higher gain can be obtained with the same aperture, or the aperture size of the reflector antenna can be reduced with the same gain requirements. This significantly improves system performance and reliability.

The application relates to the technical field of circularly polarized antennas, and discloses a small-sized circularly polarized reconfigurable metasurface antenna for assisting satellite communication, which is provided with a dielectric layer provided with a plurality of metal through holes, metal resonance structures arranged on the upper and lower surfaces of the dielectric layer and a metal ground plate; the metal resonance structure comprises a plurality of metaline units arranged in a periodic mode along a horizontal direction, each metaline unit comprising: an upper metal stub, a metal main arm and a lower metal stub arranged in a sequential mode along a vertical direction; a first PIN diode is connected with the metal main arm at a positive electrode and connected with the upper metal stub at a negative electrode; a second PIN diode is connected with the lower metal stub at a positive electrode and connected with the metal main arm at a negative electrode; and the metal ground plate is connected with the metal stubs of the metal resonance structure through the metal through holes. PIN diodes are integrated between the metal main arm and the two side grounding metal stubs, the on and off states are switched by controlling the bias voltage, and the polarization direction is adaptively adjusted.

This invention relates to the field of circuit hardening technology, and provides a voltage-controlled oscillator (VCO) circuit and phase-locked loop (PLL) circuit that are resistant to single-event transients. Addressing the issue that traditional three-mode relaxation oscillator (VCO) circuits are unsuitable for low-voltage conditions, especially when the power supply voltage drops to around 0.8V, this invention employs six oscillation branches coupled into three large oscillation loop circuits to improve loop gain. Furthermore, by combining bias circuits, comparators, and voting circuits for each path, the problem of increasing nonlinearity is avoided. This achieves a combination of large oscillation loops, bias circuits, and a three-mode VCO architecture, resulting in a VCO circuit that maintains high-frequency stable operation under ultra-low voltage conditions such as 0.8V, thus achieving a single-event transient resistance effect, especially at low voltages of 0.8V.

The present specification provides a satellite communication antenna and electronic equipment, the antenna comprises a first radiation branch and a parasitic unit, the parasitic unit is a ring branch, and at least part of the branch is close to the first radiation branch and is coupled, and the parasitic unit is connected to the ground through at least one ground point.The satellite communication antenna of the embodiment of the present specification forms circular polarization by using the coupling effect of the parasitic unit, greatly improves the antenna gain compared with linear polarization satellite antenna, and improves the actual experience of satellite communication.And the radiation direction of the satellite communication antenna is mainly towards the zenith region, so that the antenna efficiency is higher, the satellite searching and communication efficiency in the state of user handheld mobile phone is improved, and the user experience is improved.

The invention discloses a multipath amplitude phase adjusting device, which comprises supports, PCBs, coupling scribing pieces and clamping devices, and is characterized in that the number of the supports is two, the PCBs are arranged on the wall surfaces of the two supports, and the wall surface of each PCB is provided with a plurality of branch slow-wave microstrip lines which are distributed at intervals; the plurality of branch slow-wave microstrip lines are concentrically arranged around a first shaft, the coupling slip sheet is arranged on the upper wall of the PCB, the coupling slip sheet is provided with a power amplifier network line matched with the microstrip lines, one end of the coupling slip sheet is pivotally mounted on the PCB through the first shaft of the clamping device, and the clamping device is used for driving the coupling slip sheet to swing around the first shaft as the axis. The position of the coupling slip sheet on the branch slow-wave microstrip line is adjusted; and the first shaft is provided with an input line matched with the power amplifier network line. Under the requirement of the same phase adjustment quantity, the branch slow-wave microstrip line and the coupling slip sheet are coaxially arranged. The arc track length required by using the slow-wave microstrip line is shorter than that required by using a common microstrip line or a cable.

The utility model discloses a high-transmittance gain type diffusion film which comprises a base material layer, a diffusion layer is arranged on the upper surface of the base material layer, the diffusion layer is of a structure which is composed of a plurality of diffusion particles with different particle sizes and has height difference, a prism layer is arranged on the lower surface of the base material layer, and the prism layer is composed of a plurality of prism structures with the same or different shapes. Wherein the base material layer is a PET or PC light-transmitting layer, and the thickness h of the base material layer is 10-100 [mu] m or 100-250 [mu] m; the coating is an AR coating; the diffusion layer is formed through diffusion particle coating or UV transfer printing or hot pressing, and the height difference L of diffusion particles is larger than or equal to 4 micrometers. The distance P between the top ends of every two adjacent prism structures is 4-200 microns, the height of each prism structure is H + delta H, and H is 2-100 microns, 0 lt; [delta] Hlt; h / 2. According to the structural design, the diffusion brightness gain of the diffusion film is larger than or equal to 4%, the gain is large, and the diffusion film has high penetrability.

The embodiment of the invention provides a high-gain broadband low-noise amplifier with a high linear range. The circuit is applied to the radio frequency integrated circuit technology and comprises a first-stage amplification circuit, a second-stage amplification circuit and a matching network, and the first-stage amplification circuit and the second-stage amplification circuit are connected through the matching network; the first-stage amplification circuit adopts a cascode structure formed by a single tube and is used for performing first-stage amplification on an input signal; the second-stage amplification circuit adopts a cascode structure formed by composite tubes and is used for performing second-stage amplification on the input signal; and the matching network is used for receiving an output signal of the first-stage amplifying circuit and inputting the output signal of the first-stage amplifying circuit into the second-stage amplifying circuit. The design meets the requirements of high gain, low noise and high linearity.

A kind of high gain magnetic integrated DC-DC converter for photovoltaic power generation system, it is characterized in that, including CDDC unit, the CDDC unit is connected with power supply V IN Connection, the CDDC unit is connected with magnetic integrated inductance unit, the magnetic integrated inductance unit is connected with fast recovery diode D3, the fast recovery diode D3 is connected with power switch tube Q1, the magnetic integrated inductance unit is connected with fast recovery diode D4, the fast recovery diode D4 is connected with output filter capacitor C3, EE magnetic core upper portion is arranged in the magnetic integrated inductance unit, EE magnetic core lower portion is arranged in the magnetic integrated inductance unit, topology structure is simple, device is less, control is convenient, especially modular design is carried out, the CDDC unit is introduced, so that system obtains higher gain, while the magnetic integrated inductance unit introduced improves the power density of converter, the application helps to promote the performance improvement of high gain magnetic integrated DC-DC converter for photovoltaic power generation system.

The application provides a 1.7-micron-band single-frequency fiber laser based on a composite glass optical fiber, which comprises a long linear cavity, and the long linear cavity comprises, in sequence, a high-reflection Bragg grating (3), a composite glass optical fiber (4), a saturable absorber (5) and a low-reflection Bragg grating (6). 3+ The composite glass optical fiber is a multimode optical fiber, has a double-clad structure, and the core is Tb 3+ The inner cladding is Tm 3+ The outer cladding is undoped rare earth composite glass. The 1.7-micron-band single-frequency fiber laser is compact in structure, high in efficiency and narrow in line width, and can be applied to the fields of gas sensing, precision measurement, laser radar and the like.

The invention discloses a model collaboration method and device, communication equipment, a storage medium and a computer program product. The method comprises the steps that a first network element receives first index data sent by a plurality of nodes; the plurality of nodes comprise a first node and a plurality of candidate nodes, and first index data of the first node is sent through a first message used for requesting a data analysis task; determining a second node participating in the data analysis task according to the first index data of the plurality of candidate nodes; indicating the first node and the second node to collect second index data respectively, and obtaining the second index data from the first node and the second node; the first model is trained according to the second index data of the first node and the second node, a first parameter set is obtained, and values of at least part of parameters in the first parameter set are different from values of corresponding parameters after training of the first model is completed; and sending the first parameter set to the first node, so that the first node configures the second model according to the first parameter set.

The application provides a high-gain dual-polarized dipole antenna, which comprises a first dielectric plate, a second dielectric plate, a reflecting plate, a first coaxial cable, a second coaxial cable, a first 1:2 power divider, a second 1:2 power divider, an antenna radiator and four feed baluns; the first dielectric plate is arranged in parallel above the middle part of the second dielectric plate, the reflecting plate is printed on the lower surface of the second dielectric plate, and the first 1:2 power divider and the second 1:2 power divider are printed on the upper surface of the second dielectric plate; the antenna radiator is printed on the upper surface of the first dielectric plate and comprises four dipole radiation arms; the four feed baluns are arranged between the first dielectric plate and the second dielectric plate, and one feed balun is arranged below every adjacent two dipole radiation arms in the circumferential direction. The application realizes wide bandwidth, high gain and good directional radiation performance through a simple and compact structure.

The present application relates to an electronic package, a method for manufacturing the same, and an antenna module, a method for manufacturing the same. The antenna module includes a plurality of antenna structures and a shielding structure arranged on a board. The shielding structure is located between two adjacent antenna structures. The shielding structure includes a recess formed on the board and a dielectric material formed between the recess and the antenna structures to generate different impedance characteristics and improve antenna isolation.

The invention relates to a scintillation detection system, which belongs to the technical field of X-ray signal detection, solves the technical problems of weak anti-interference capability and low signal-to-noise ratio of X-ray detection, and consists of a plurality of detection units which are serially arranged, each detection unit comprises an incident channel, a transmission channel, a reflection channel, a light collection channel, a scintillator, a scintillator support, an optical fiber light transmission beam, a photoelectric detector and an electromagnetic shielding box. The incident channel, the transmission channel, the reflection channel and the light collection channel are connected with one another to form a vacuum chamber. The center of the scintillator is located on a convergent point of central axes of the four channels. The surface of the scintillator is perpendicular to the central axis of the light collection channel. The incident end of the optical fiber light transmission beam is connected with the light collection channel, and the emergent end is connected with the photoelectric detector which is located in the electromagnetic shielding box. Light emitted by the scintillator reaches the incident end surface of the optical fiber light transmission beam, and the light intensity is uniformly distributed. The low-intensity X-ray detector is used for low-intensity X-ray detection under strong background interference.

The application discloses a ship radiated noise power spectrum measurement method based on frequency difference beam forming, comprising the following steps: obtaining a to-be-measured radiated noise signal received by a base array; constructing a difference frequency signal through the conjugate product of the to-be-measured radiated noise signal and a reference frequency signal; performing beam forming on the constructed difference frequency signal based on the difference frequency, and calculating the amplitude of the beam output signal of the difference frequency signal; correcting the amplitude of the beam output signal of the difference frequency signal by using the amplitude of the reference frequency signal to obtain the amplitude of the to-be-measured radiated noise signal, and calculating the power spectrum of the to-be-measured radiated noise signal. The application converts the signal outside the design frequency band of the base array to the inside of the design frequency band to perform beam forming, improves the array gain, better suppresses the environmental noise, improves the measurement performance of the base array on the radiated noise outside the design frequency band, greatly expands the frequency band width of the ship radiated noise measurement, and can realize the measurement of the radiated noise with a larger bandwidth by using a smaller aperture array.