31results 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 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.

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.

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 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 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 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.

This application discloses a building antenna, relating to the field of wireless communication technology. The building antenna includes a base plate, an upper antenna, and a lower antenna. Both the upper and lower antennas are disposed on the base plate. The electromagnetic waves radiated by the upper antenna cover the upper part of a target building, and the electromagnetic waves radiated by the lower antenna cover the lower part of the target building. Both the upper and lower antennas include a substrate and at least two radiating elements. The substrate is disposed on the base plate, and each radiating element is disposed on the substrate and arranged in an array. The number of radiating elements in the lower antenna is greater than the number of radiating elements in the upper antenna. This solution can solve the problem of uneven signal coverage of current building antennas to target buildings.

The application discloses a kind of multi-frequency common aperture instantaneous multi-beam reflection phased array antenna, comprising: feed source, for distributing input radio frequency signal to each array element on reflection array surface;Reflection array surface is made of multiple passive array elements, and array element is used to reflect incident electromagnetic wave;By adjusting the phase of each array element, the regulation of reflected beam is realized;Multiple filter phase shift modules, each array element is connected with a filter phase shift module, and the filter phase shift module includes filter and phase shifter;Filter is used to select the signal of specific frequency range, and phase shifter is used to adjust the phase of each array element reflected wave;Beam control system is connected with filter phase shift module, for coordinating and controlling entire phased array antenna, to realize the required beam direction.The application has significant advantages, including higher integration, lower power consumption, more effective heat dissipation performance and more economical cost structure, which makes phased array antenna can well meet the needs of multi-task system.

This invention discloses a quasi-cavity, small-scale anti-metal UHF tag antenna in the field of radio frequency identification (RFID) technology, aiming to solve the problems of excessive size and volume in existing anti-metal UHF electronic tags. It includes a quasi-metallic cavity, which consists of a metal bottom surface and three metal side surfaces. An internal foam layer is provided, and a dielectric substrate is placed on the foam layer. A tag antenna pattern is printed on the upper surface of the dielectric substrate. The tag antenna pattern, from the outside in, includes an open conductor rectangular ring, two irregularly shaped multi-turn conductor rectangular rings, a lateral adjustment conductor strip, and a longitudinal adjustment conductor strip. The two irregularly shaped multi-turn conductor rectangular rings are symmetrically arranged, and a tag chip is connected to their central portion. This invention has a simple structure, reduces the size of the anti-metal UHF tag antenna, and has better radiation performance and easier impedance adjustment.

An improved differential evolutionary sparse distribution optimization method based on virtual interference patterns is proposed. This invention relates to sparse distribution optimization methods for spaceborne antennas. The purpose of this invention is to solve the problem that the limited number of uniform phased array elements due to the limited load of spaceborne antennas restricts the antenna performance. The process is as follows: 1. Create an initial population, with each population having N... p An individual represents one of the M radii corresponding to the antenna array ring; the population represents the N radii corresponding to the antenna array ring. p ×M radii; N p For all individuals in a population; 2. Calculate the fitness value of each individual; Fitness value F(d1,d2,...,d...) N The value is defined as the average of the main lobe and side lobe gain ratios on the plane and the θ = 0° plane; III. Repeat step II to obtain N. p The population is analyzed by first determining the fitness value of each individual, then retaining the individual with the optimal fitness value; fourth, a differential operation is performed on the population to obtain the optimal individual, which is the optimal antenna array. This invention is applicable to the field of aerospace technology.

The utility model discloses a kind of through guide integration satellite communication terminal, and the first element for the first band noise filtering of the transmission signal amplified by PA is added between PA and transmitting antenna in the embodiment of the present disclosure, the generation of the in-band interference of reception frequency point is inhibited from source head;Second element for the first band rejection processing of the transmission signal received by receiving antenna to the transmission signal received by receiving antenna is added between receiving antenna and first LNA, avoid the large signal in transmission signal to push 1st LNA to saturation state, leading to the performance of entire receiving link sharp deterioration;To 1 or n levels of first LNA, the output end of several first LNA in it is connected with third or fourth element, the gain of effective signal frequency point and band rejection effect are improved;Through increasing first, second, third and fourth element, the communication navigation function of through guide integration satellite terminal does not interfere with each other, ensure the normal reception of downlink signal when communication transmission, solve the wireless self-interference problem of through guide integration satellite communication terminal.

The present invention provides a differential disk-fed Taiji diagram-shaped patch circularly polarized antenna based on an inverted-F structure in the technical field of microwave antennas, which includes a radiator, a dielectric substrate, a metal through-hole, a differential feeding probe with a loaded disk, and a ground plane. The radiator is connected to the upper surface of the first-layer dielectric substrate, and the radiator is connected to the metal through-hole. The metal through-hole penetrates through the first-layer and second-layer dielectric substrates and is connected to the ground plane; the differential probe feeds the radiator through a disk at the top, and the bottom of the differential feeding probe forms a feeding port with the ground plane. The present invention improves the function of the circularly polarized antenna and designs a differential disk-fed Taiji diagram-shaped patch circularly polarized antenna based on an inverted-F structure, realizing the characteristics of high gain, wide bandwidth, and wide axial ratio.

This invention discloses a uniformly distributed radiation energy structure for a millimeter-wave antenna, comprising a transmitting array antenna and / or a receiving array antenna composed of at least one comb-shaped antenna assembly; the comb-shaped antenna assembly includes an elongated antenna body and a microstrip line radiating assembly, one end of the antenna body being connectable to a millimeter-wave circuit capable of generating millimeter waves, and the microstrip line radiating assembly comprising multiple intermediate microstrip line radiating elements spaced apart in the middle section of the antenna body, and an end microstrip line radiating element located at the tail end of the antenna body, wherein the area of ​​the intermediate microstrip line radiating elements gradually increases from one end close to the millimeter-wave circuit toward the other end, so that the distribution of the radiated energy of each intermediate microstrip line radiating element approaches an average.

The invention discloses a mirror image high-gain Boost converter with switch tubes synchronously switched on and switched off, and belongs to the technical field of power electronic direct current conversion. The converter comprises a direct-current voltage source, two inductors, seven capacitors, seven diodes and two MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) switching tubes. The core innovation lies in that the two switching tubes are completely and synchronously switched on and switched off, no dead time needs to be set, and the control logic is simplified. Through specific connection and multiplexing of a capacitor and an inductor, an efficient voltage-multiplying unit is formed, extremely high voltage gain is achieved, the gain formula is shown in the specification, and D is the duty ratio of a switching tube. According to the structure, high gain is obtained, meanwhile, the voltage stress of the switching tube is remarkably reduced, the value of the voltage stress is only output voltage, and the switching loss is effectively reduced. The device has the advantages of being small in number of devices, compact in structure, high in efficiency, low in cost and the like, and is particularly suitable for occasions where low input voltage needs to be boosted to high direct current bus voltage in the new energy field of photovoltaic systems, energy storage systems and the like.

The utility model discloses a kind of dual-frequency dual-mode dual-polarization wearable antennas, belong to antenna technical field.The antenna uses flexible substrate, which is provided with circular radiation patch and ground plane.Through etching multiple slot structure on circular radiation patch, including center inclined rectangular slot, rectangular slot and trapezoidal slot symmetrical along y axis, rectangular slot gap symmetrical along x axis, and T-shaped slot and U-shaped slot distributed on different azimuth angle, antenna can realize left-handed circular polarization directional radiation in 2.4GHz ISM frequency band, and realize linear polarization omnidirectional radiation in 5.5GHz Wi-Fi frequency band.The utility model uses above-mentioned one kind of dual-frequency dual-mode dual-polarization wearable antenna, antenna design is simple, excellent in performance, suitable for remote medical monitoring, high-speed data transmission and multiple application scenarios, with wide application prospect.

This invention discloses a method for optimizing the grid structure of a microgrid gas detector, comprising the following steps: 1. Establishing a finite element model of the microgrid gas detector; 2. Converting the obtained target candidate structure set into a Garfield++ readable format and importing it; 3. Generating a specified number and spatially distributed initial ionized electrons within the drift region and tracking their drift trajectory from the generation location to the grid; 4. Avalanche multiplication of penetrating electrons to generate secondary electrons, tracking the motion trajectories of secondary electrons and ions, and calculating the electron gain and ion feedback coefficient; 5. Outputting the original current signal and obtaining the output voltage pulse signal; 6. Analyzing multiple performance indicators obtained under different grid structure parameters, and determining the optimal configuration of the grid structure parameters through the analytic hierarchy process (AHP) to obtain a comprehensive score. This invention is the first to achieve grid structure optimization from the microscopic electronic behavior process, which can significantly reduce trial and error costs and deeply integrate physical simulation and parameter optimization functions.

The present disclosure relates to an electronic device. The electronic device includes a back cover including a camera mounting hole; a decorative lens connected to the back cover and covering the camera mounting hole; and an antenna located inside the decorative lens, the antenna including a metal radiator. The decorative lens includes a metal director layer spaced apart from the metal radiator, the metal director layer being configured to be excited by the metal radiator, and a phase difference between a magnetic field of the metal radiator and a magnetic field of the metal director layer in a radiation direction being less than or equal to a set threshold value.

This invention provides a method for creating a point-beam data transmission mission for a shipborne mobile receiving station to remote sensing satellites. The method includes: using the acquired approximate position and orbital element information of the shipborne receiving station, calculating a set of all approximate visible time windows for the entire day; then using this set to determine the approximate time window for the target data transmission mission; based on the approximate time window, sequentially calculating the ship's geocentric latitude, ship's travel distance, and spherical arc length; determining, based on the spherical arc length, whether the ship's course change exceeds a preset threshold; if so, performing segmented ship position prediction; otherwise, performing direct ship position prediction to obtain a precise predicted ship position; expanding the approximate time window based on the precise predicted ship position to obtain a precise time window; and then using the precise time window and the precise predicted ship position to construct the point-beam data transmission mission. This invention achieves precise planning of the satellite data transmission mission and ensures that the shipborne station antenna points towards the satellite to form a two-way closed link.

This invention discloses a high-gain, miniaturized millimeter-wave low-noise amplifier. It includes an input matching network, a noise level circuit, a gain stage circuit, and an output matching network. The low-noise amplifier uses a series gate inductor for noise matching and wide-bandwidth input impedance matching. The gain stage employs a slow-wave transmission line feedback mechanism to achieve high gain and wide bandwidth, and miniaturization is achieved through a spiral inductor and a slow-wave transmission line. The output matching network uses an L-shaped matching network. Unlike traditional inductors or transmission lines, this invention uses a slow-wave transmission line for feedback, achieving high gain while also possessing foldable characteristics and allowing the same inductance value to be achieved with a shorter length, thereby reducing chip area and manufacturing costs.

The application discloses a kind of based on translinear loop full differential operational amplifier common mode feedback circuit and full differential operational amplifier, belong to operational amplifier technical field.The application is applied to full differential operational amplifier, including common-mode voltage detection amplifier, output voltage division unit and feedback signal input unit;Common-mode voltage detection amplifier converts the difference between the common-mode voltage of the differential output end of the detected full differential operational amplifier and the target common-mode reference voltage into a differential current signal, converts it into a feedback control voltage through the output voltage division unit, and inputs the gain stage front end of the full differential operational amplifier through the feedback signal input unit, to form a negative feedback closed loop.The application embeds common-mode feedback circuit into main gain loop, improves feedback depth with the help of main amplifier high gain, realizes high bandwidth, high linearity output common mode precision control under low static power consumption, at the same time simplifies circuit structure, can improve the working stability of full differential operational amplifier under various non-ideal working conditions.

The application relates to a self-adjusting bandwidth microstrip Yagi rectifier antenna and application, and belongs to the field of Internet of Things sensors. The application can be applied to Internet of Things sensors, and comprises a microstrip Yagi antenna and a rectifier. The microstrip Yagi antenna comprises a first substrate, an active oscillator, a reflector and a directive antenna. The rectifier comprises a microstrip line and an impedance changer. The application realizes self-power supply and saves electric energy. Meanwhile, the combination of a resistance voltage dividing circuit and a MOS tube is used. The combination of the DC voltage voltage dividing by the resistance voltage dividing circuit and the MOS tube controls the opening and closing of the directive antenna, various opening and closing combinations are formed, the bandwidth size is adjusted, and the problems that a traditional sensor needs active power supply and the communication bandwidth is narrow and unadjustable are solved.

This invention discloses a Fabry-Perot resonant cavity antenna based on a hybrid partial reflector element, belonging to the field of millimeter-wave / terahertz antenna technology. The antenna includes a partial reflector surface, a feed source, and a metal ground plane. The partial reflector surface includes a positive phase gradient element group and a negative phase gradient element group. The positive phase gradient element group is composed of multiple identical first element arrays arranged in an array, located in the central region of the partial reflector surface. The negative phase gradient element group is composed of multiple identical second element arrays arranged around the positive phase gradient element group. By surrounding the positive phase gradient element group with the negative phase gradient element group, electromagnetic waves irradiating the center of the partial reflector surface achieve in-phase superposition after multiple reflections, while low-energy electromagnetic waves irradiating the periphery are radiated outwards, thus fully utilizing the electromagnetic wave energy within the cavity. This reduces frequency sensitivity while ensuring high antenna gain and increasing antenna bandwidth.

This invention relates to the field of radio frequency (RF) technology, and particularly to a low-noise amplifier. The low-noise amplifier of this invention includes an amplification circuit and a bypass circuit. The input terminal of the amplification circuit and the first input terminal of the bypass circuit are interconnected and used to receive RF signals. The second input terminal of the bypass circuit is connected to a first control voltage. The output terminal of the amplification circuit and the output terminal of the bypass circuit are connected and used to output RF signals. A power supply and power consumption adjustment unit is used to adjust the power consumption of the amplification circuit according to a second control voltage. A shutdown unit is used to control the conduction or disconnection of the amplification circuit according to a third control voltage. Compared with the prior art, the low-noise amplifier of this invention includes multiple operating modes, and the operating mode of the low-noise amplifier can be controlled by the shutdown unit and the power supply and power consumption adjustment unit, thereby achieving high gain, low noise, and high applicable frequency. It achieves high circuit integration, low cost, and adjustable power consumption and gain, and is applicable to high frequencies.

The application provides a semiconductor device and a preparation method thereof, and relates to the technical field of semiconductors. A first gate field plate electrically connected with a gate metal is added between a source field plate and a drain metal, and the first gate field plate is electrically connected with the gate metal through a resistor. In this way, the first gate field plate has a lower potential. On one hand, the first gate field plate can shield the electric field between the drain and the gate, and can further deplete the two-dimensional electron gas at the channel, so as to reduce the Cgd of the device, improve the gain and stability of the device, and avoid self-excitation of the device. On the other hand, the first gate field plate can shield the electric field between the drain and the source, reduce the Cds of the device, and thus improve the drain efficiency of the device.

The invention discloses a silicon-based external cavity laser integrated with an on-chip erbium-doped optical waveguide amplifier. The silicon-based external cavity laser comprises a silicon-based external cavity laser body and the erbium-doped optical waveguide amplifier. The silicon-based external cavity laser is used for generating signal light and outputting the signal light into the erbium-doped optical waveguide amplifier; the erbium-doped optical waveguide amplifier receives signal light output by the silicon-based external cavity laser, and the signal light and pump light input into the erbium-doped optical waveguide amplifier jointly act in an erbium-doped medium to obtain amplification gain. By combining the advantages of tunable wide-range wavelength, ultra-narrow linewidth, small size and high integration level of the silicon-based external cavity laser and high gain and low noise of the on-chip erbium-doped optical waveguide amplifier, high-power and high-integration-level narrow linewidth laser output is realized; the problems that a current commercial solid-state laser, an optical fiber laser and a semiconductor space light external cavity laser are large in size and high in power consumption, and a current semiconductor laser is insufficient in output light power and limited in line width compression are solved.

This invention relates to the field of communication technology and provides an array antenna. The array antenna includes a reflector and at least one co-frequency radiating element group. The co-frequency radiating element group includes multiple radiating elements, which are nested sequentially and respectively mounted on the reflector. The operating frequency range of the multiple radiating elements is the same, either low-frequency, mid-frequency, or high-frequency. The co-frequency radiating element group in this array antenna not only possesses excellent performance indicators such as gain and bandwidth convergence, but also enables a reduction in the size of the array antenna, thereby achieving miniaturization of base station antennas.