52 results about "Directional antenna" patented technology

The application provides a device for adopting multi-channel transmitting signals, and belongs to the technical field of signal processing. The device comprises multiple signal transmitting branches, each of which comprises a directional antenna and a radio frequency channel connected with the directional antenna; a baseband module connected with the multiple signal transmitting branches; the radio frequency channel comprises a first band-pass filter, a second band-pass filter, a first radio frequency switch and a gain adjusting module; the first radio frequency switch is used for selecting the first band-pass filter or the second band-pass filter to be communicated with the gain adjusting module according to the working mode of the device for adopting multi-channel transmitting signals, so as to output the filtered target bandwidth signal through the directional antenna, output the filtered target bandwidth signal through the directional antenna in each signal transmitting branch, and further provide a test scene for a to-be-tested wearable device, so that the performance verification of the to-be-tested wearable device does not need to be carried out in an actual scene, the verification cost is reduced, and the verification efficiency is improved.

An anti-jam gimbal antenna (AJGA) system for vehicles, aircraft, and maritime vessels for ensuring connectivity to a remote base station includes a directional antenna and a gimbal mounting assembly. The directional antenna emits a focused cone of emissions. The gimbal mounting assembly mounts the directional antenna to the mobile vehicle while allowing rotation of said directional antenna about the mobile vehicle on multiple axis. Wherein, the anti-jam gimbal antenna (AJGA) system is configured to continuously align the directional antenna mounted on the mobile vehicle with the remote base station.

The application provides a multi-signal spectrum separation method, device, equipment and medium, which is used in the technical field of radio monitoring and can solve the technical problem of low spectrum separation accuracy caused by the limitation of channel number and poor adaptability of directional antenna array. The method comprises the following steps: calculating a real-time conjugate transpose signal and a time-delay conjugate transpose signal under multiple different time delays according to a real-time composite signal, and determining a corresponding covariance matrix and multiple pseudo-covariance matrices; determining a matrix product according to the conjugate transpose matrix of an initial demixing matrix, obtaining multiple initial product matrices, and judging whether the initial product matrices are all approximate diagonal matrices; iteratively processing the initial demixing matrix to obtain a target demixing matrix; determining a corresponding array manifold matrix based on the target demixing matrix, and determining the signal amplitude of each signal at the frequency point corresponding to the array manifold matrix and the mixed amplitude and phase vector corresponding to each frequency point; thus, the spectrum separation accuracy is improved.

This invention provides a method and system for locating partial discharge in substations based on a directional sensor array, comprising: Step S1: using an array of N directional antennas to receive and sample partial discharge signals from the partial discharge source to obtain a signal sequence x1, x2, ..., x N Based on the signal sequence x1,x2,…,x N Obtain the measurement matrix X; Step S2: Calculate the noise matrix E of the signal based on the measurement matrix X. n Step S3: Based on the antenna gain pattern function g(θ), according to the signal noise matrix E n The spatial spectral function P was calculated. mu (θ); Step S4: P is adjusted from 0° to 360°. mu (θ) performs a maximum search, where the angle corresponding to the maximum value is the directional angle of the local discharge source. This invention is based solely on signal strength information, has a fast calculation speed, does not have high sampling requirements, and has high directional accuracy. Furthermore, the directional antenna used is small in size, resulting in low equipment cost.

(Main claim) Mobile system for defense against unmanned aerial vehicles, comprising: • a radar system for target detection, • an electro-optical and / or infrared-based observation system, • an extendable or foldable mast platform, • a directional jammer with at least one directional antenna on a stabilized platform, • a central control unit, and • an operating and display unit, characterized in that the central control unit calculates a dynamic jamming vector from the sensor data, which determines both the orientation of the directional antenna and the spectral distribution of the jamming signal.

This invention discloses a single- and dual-band reconfigurable microstrip quasi-Yagi antenna. The antenna includes a dielectric substrate, a coplanar radiating patch, a first director, a second director, a microstrip feed line, and four radio frequency (RF) PIN diodes. The coplanar radiating patch is printed on the front side of the dielectric substrate. RF PIN diodes are respectively disposed between the first and second directors, the main radiating patch of the coplanar radiating patch, and the four parasitic radiating patches. The microstrip feed line is printed on the back side of the dielectric substrate. By reasonably setting the conduction and cutoff of the four PIN diodes, this invention can operate in the n78 or n79 frequency band, or simultaneously operate in both the n78 and n79 frequency bands as a dual-band antenna. This antenna achieves good directional radiation in all operating frequency bands, with stable radiation performance. It is a novel, small-sized, lightweight, low-profile, and small-scattering-cross-section directional antenna.

This utility model discloses a dual-polarized, dual-port, high-gain directional antenna, including an antenna assembly. An RF component can be connected to the antenna assembly, and a support assembly is provided on one side of the antenna assembly to provide insulation and support. The advantages of this utility model are that it can achieve high gain over a wide frequency band, maintaining good performance from 5900MHz to 7.2GHz, with both high gain and efficiency. Because the support plate is integrally stamped from the reflector, material and labor costs are saved. The metal antenna vibrator uses a hollowed-out design at the weld joint, reducing the welding contact area and facilitating welding. The product structure is simple, easy to manufacture, and has good consistency. Since one antenna has two ports, it is equivalent to installing two single-port antennas under the same conditions, resulting in lower costs. The overall antenna height is low, and the appearance is aesthetically pleasing, making it more acceptable to ordinary users.

This invention relates to the top layer of a three-layer, bottom-level robotic aerial work system. It includes equipment for supplying, generating, mixing, and conveying power (water, electricity, gas, paint, materials, etc.); a conveyor body composed of truss modules; pipe and line reversing joints; pipe and line cable fixing bases; an IoT carrier wave generator; a wireless directional antenna; and climbing rope cable fixing posts. It is responsible for supplying power, water, gas, paint, and materials; a dual-link communication base; and climbing rope cables; conveying pipes and lines along the climbing ropes to the middle layer.

The invention relates to a body part (10) for a motorized land vehicle (200) comprising at least one wall (20) made of a plastic material and comprising at least one housing (90) forming a cavity (80) for electromagnetic waves, said housing (90) comprising: at least one transceiver (50) for transmitting and / or receiving an electromagnetic wave in said housing (90); at least one adaptable surface (60) capable of reflecting the electromagnetic wave transmitted by the transceiver (50) in a given direction (in a controlled manner) and, conversely, capable of reflecting the electromagnetic wave coming from the exterior of the housing (90) toward the transceiver (50).

The application discloses a conformal annular metal cavity omnidirectional antenna based on slot radiation and belongs to the technical field of antennas, which comprises an annular metal cavity for containing a columnar carrier; two rectangular slots are symmetrically formed on the side wall of the annular metal cavity; two coaxial feeding structures; and a conical metal cavity is coaxially arranged on the periphery of the annular metal cavity and used for balancing the electric field phases of the two rectangular slots. After the two rectangular slots are excited, the directly radiated electric field in the horizontal plane has the problem of uneven electric field distribution, which causes the radiation recess to exist unevenly in the horizontal plane pattern. By loading the conical metal cavity around the annular metal cavity, the introduction of the conical metal cavity metal balances the rectangular slot and the radiated horizontal plane electric field, improves the electric field distribution, and improves the omnidirectional characteristics and horizontal plane gain of the antenna.

A battery pack includes a housing, a plurality of assembled batteries disposed in the housing, obtaining units arranged one for each of the assembled batteries in the housing, and the monitoring device equipped with a master antenna. The obtaining units obtain battery information about the assembled batteries and transmit it to the master antenna of the monitoring device through wireless communication using slave antennas. The master antenna and / or the slave antennas are each implemented by a directional antenna which emits a radio wave to be higher in power in a given directional direction than in a given undirectional direction. This minimizes a risk of a communication failure arising from radio wave interference.

The application provides an energy transmitting device, a control method thereof and a passive Bluetooth system. The control method of the energy transmitting device comprises: if a receiver receives energy transmitted by the energy transmitting device, obtaining the receiving efficiency of the receiver; and if the receiving efficiency is lower than a threshold, adjusting a directional antenna to change the relative position of the directional antenna and the receiver and improve the receiving efficiency of the receiver. When the energy receiving efficiency of the receiver is lower than the threshold, the relative position of the directional antenna and the receiver is changed so that the wave crest of the energy radiated by the directional antenna is close to the receiver, thereby improving the receiving efficiency of the receiver and the energy transmission efficiency between the energy transmitting device and the passive Bluetooth device.

The application discloses a large-area defense unmanned aerial vehicle directional attack equipment, a countermeasure system and a correction method, wherein the unmanned aerial vehicle directional attack equipment comprises a single-soldier type equipment shell, a power supply, a switch, a controller A, an interference module and a sky feed subsystem, the sky feed subsystem comprises a directional antenna, and the application further comprises a countermeasure azimuth indication module, the countermeasure azimuth indication module comprises a direction sensor A, a display A, a GPS positioning module A, a voice module A and a wireless signal transceiving module A. The large-area defense unmanned aerial vehicle directional attack equipment can be effectively incorporated into the unmanned aerial vehicle countermeasure system, so that the flexibility and the countermeasure efficiency of the unmanned aerial vehicle countermeasure system are remarkably improved. The countermeasure system of the application can remotely correct the detection direction of the unmanned aerial vehicle directional detection equipment and the countermeasure direction of the unmanned aerial vehicle directional attack equipment, so that the countermeasure efficiency of the unmanned aerial vehicle countermeasure system is remarkably improved.

The utility model discloses a omnidirectional antenna convenient to dismount, including base and mounting seat, the base upper surface is provided with stand, the stand top is provided with fixed base, the fixed base upper surface is opened with adjusting groove, the fixed base upper surface is provided with a plurality of insertion post symmetry, the adjusting groove is opposite two surfaces and is opened with the sliding slot, the sliding slot is slidably connected with the sliding block, the adjusting groove is rotatably connected with the threaded rod, the threaded rod both ends circumferential surface is inserted with the moving block, the moving block upper surface is provided with the insertion block. The utility model when needs to dismantle antenna body, first makes bolt from thread hole and separates with the bolt screwing, and the threaded rod circumferential surface is not resisted by bolt top, then can rotate the threaded rod and drive the moving block of circumferential surface and move to both sides along the sliding slot through the sliding block, make the insertion block separate from the slot, and move to the slot, can dismantle mounting seat from the fixed base surface.

A HEMP enclosure includes a recessed coaxial connector interface. The connector interface is located at the bottom of a metallic tube in the chassis wall that functions as a waveguide below cutoff (WBC). The WBC attenuates the electromagnetic pulse threat signal to a benign level when the transmitter enclosure is not inserted for testing. Internal to the chassis, the connector interface includes an omni-directional antenna. A transmitter enclosure includes a wand to plug the transmitter into the connected interface. The transmitter generates an RF signal at a desired frequency range that is then transmitted via a coaxial cable in the wand to the antenna in the chassis.

The application provides an anti-interference pipeline horizontal distance detection method and device, and belongs to the technical field of underground pipeline detection. The method comprises the following steps: acquiring horizontal and vertical two-way magnetic field signals and preprocessing; based on a preset excitation signal frequency, performing time domain sine fitting on the signals through an adaptive least square algorithm to extract amplitude, phase and direct current bias components; constructing a feature vector, obtaining real-time signal-to-noise ratio and signal purity weight through principal component analysis, and screening an adaptive nonlinear mapping model; generating an optimized phase through phase preprocessing, calculating an original phase angle difference and smoothing to obtain an accurate phase angle difference, and generating a dynamic compensation factor through the selected model; and combining the signal amplitude, the dynamic compensation factor and the signal purity weight to calculate the final horizontal distance. The device is configured with the method, and comprises a multi-directional antenna for collecting two-way magnetic field signals. The application is designed with full-process anti-interference, which greatly improves the detection accuracy and stability and is suitable for complex scenes.

This invention provides a broadband dual-polarized array antenna, including an antenna body composed of multiple metal vibrating antenna elements arranged in an array. Each metal vibrating antenna element has a signal unit mounted on it. Each metal vibrating antenna element includes a reflective base plate. The signal unit includes a dual-polarized metal vibrating element, a directional antenna, and a BMA RF connector. The dual-polarized metal vibrating element and the directional antenna are located on the front side of the reflective base plate, and the BMA RF connector is located on the back side of the reflective base plate. This invention achieves dual polarization and miniaturization of the array antenna while reducing structural complexity and size.

The utility model discloses a kind of antenna directional diagram reconfigurable RFID label, belong to radio frequency identification (RFID) technical field. Including RFID label ontology, middle is set to fold dipole antenna and label chip, left and right two sides are set to left and right passive dipole, there is phase-change radio frequency switch each in its upper and lower, passive dipole effective electric length is controlled by switch on-off, realize omnidirectional / directional antenna multiplexing structure. When all switches are off or on, it is omnidirectional antenna, left and right side switch different on-off state can make antenna directional radiation left or right. The utility model utilizes phase-change radio frequency switch, with low power consumption, fast response, directional diagram power-off memory and the like advantages, can flexibly switch antenna radiation direction, solve the low gain of RFID label antenna in prior art and the problem of high power consumption, poor flexibility in the process of reconfigurable antenna radiation direction adjustment.

This invention discloses a UAV beyond-line-of-sight (BLOS) shared communication method based on tropospheric scattering, applied to an air-to-ground collaborative emergency communication system, aiming to alleviate the "information island" problem under the "three disruptions" environment of natural disasters. The method mainly includes: controlling the UAV platform to take off, using a directional antenna to transmit a low-elevation, narrow beam, and establishing a BLOS wireless communication link based on the tropospheric forward scattering mechanism; real-time acquisition of on-site channel state parameters and inputting them into a dynamic scattering channel capacity model to adaptively adjust the transmission power and modulation strategy; obtaining the priority status of multiple services and dynamically scheduling channel resources for voice, data, and video services through a gated bandwidth allocation mechanism; and calculating the target cost function by combining battery power consumption and link loss, outputting flight control commands to dynamically adjust the UAV's optimal dwell position. This invention forms a closed loop between the underlying algorithm and system hardware control, which helps to establish a reliable emergency communication link under geographically obstructed conditions, improves the transmission quality of multiple concurrent services, and extends the system's continuous operation time.

An antenna array structure may include a plurality of end-fire antennas, the antennas are disposed next to each other in an arc shape, wherein the plurality of antennas comprises one or more directional antennas, wherein the plurality of antennas comprises one or more Yagi-Uda antennas, and wherein the plurality of antennas comprises one or more Leaky-Wave antennas.

An anti-jamming time synchronization method and apparatus for maintaining time synchronization between a global positioning system (GPS) and a satellite-based augmentation system (SBAS) are provided. The anti-jamming time synchronization method includes receiving a GPS signal from a GPS satellite using an omnidirectional antenna, receiving an SBAS signal from an SBAS satellite using a directional antenna, calculating measurement values of the GPS signal and the SBAS signal, decoding a GPS message of the GPS signal and an SBAS message of the SBAS signal, when the measurement values are values within a normal range, synchronizing time with GPS time based on a measurement value of the GPS signal and the GPS message, and when the measurement values are values beyond the normal range, synchronizing time with the GPS time based on a measurement value of the SBAS signal and the SBAS message.

The application discloses a method for separating same-frequency signals in space, which comprises the following steps: S1, acquiring the elevation angle and azimuth angle of a satellite; S2, calculating a guide vector of a satellite signal coming direction; S3, injecting an interference signal into other satellite coming directions except the satellite signal coming direction to be pointed, so as to obtain a new input signal X'; S4, applying an adaptive beam forming algorithm to the new input signal to obtain a synthesized directivity pattern which forms a pointing gain in the signal coming direction to be separated and forms a "null" in other signal coming directions, so as to separate the same-frequency signals; the application solves the problems of a complex system, large volume and high cost caused by the traditional method for separating same-frequency signals in space by using multiple directional antennas; the application avoids the problem of high calculation complexity of the array signal processing method using a multi-linear constraint, greatly shortens the calculation time, and can be realized by simply modifying the traditional anti-suppression interference algorithm, and is convenient and easy to implement.

This invention discloses a device and method for aggregating drone information detected by multiple detection modules into a communication module. The device includes multiple detection modules, a communication module, a PCB motherboard, and a power supply unit. The key feature is that the multiple detection modules, communication module, and power supply unit are all integrated and mounted on the PCB motherboard. Each of the multiple detection modules is connected to an external antenna, and the multiple detection modules are sequentially connected in series via G17 and G18 interfaces to form a cascaded transmission link. This device, which aggregates drone information into the communication module through multiple detection modules connected in series, combined with a combination of six directional detection modules and one omnidirectional detection module, effectively compensates for the detection blind spots caused by a single detection motherboard. Simultaneously, the directional antennas increase the drone detection range, solving the problems of short detection range and insufficient information density in existing technologies, and achieving omnidirectional, long-range detection of drone signals.

The application discloses a flight position design method for a UAV and an active RIS assisted communication system, comprising the following steps: taking the center of the active RIS as a coordinate origin and establishing a space rectangular coordinate system with a plane where the active RIS is located as a yOz plane; calculating the number of covered reflection units of the UAV directional antenna beam on the active RIS according to the geometric position relationship in the space rectangular coordinate system; calculating the receiving rate of the ground user according to the number of the reflection units; sequentially calculating the three-dimensional coordinates of the UAV according to the number of the reflection units and the receiving rate; setting an initial value, alternately iterating the calculation formula of the three-dimensional coordinates of the UAV, if convergence is obtained, the optimal position of the UAV is obtained; if convergence is not obtained, the three-dimensional coordinates of the UAV are sequentially calculated again until convergence is obtained; the active amplifier is integrated into the reflection unit to amplify the reflected signal, enhance the link regulation ability of the RIS, and the combination of the active RIS will further provide channel gain for wireless communication.

The present disclosure provides an antenna device including a ground plane, a plurality of omni-directional antennas connected to the ground plane, a directional antenna connected to the ground plane, and a wall structure including a metal and connected to the ground plane, the wall structure surrounding the directional antenna and disposed between the directional antenna and the plurality of omni-directional antennas.

A streetlighting system (100) comprising a plurality of streetlights for establishing line-of-sight communication links between any two adjacent streetlights. The streetlighting system (100) comprises a second streetlight (300) comprising a second luminaire (310) mounted on a second pole (330) and configured to provide a second horizontally elongated light distribution (311); a second antenna unit (320) comprising a third antenna module (350) and a fourth antenna module (360), wherein the third antenna module (350) is configured to emit a third directional radio beam (321) and the fourth antenna module (360) is configured to emit a fourth directional radio beam (322); wherein beam axes (323, 324) of the third and the fourth directional radio beams (321, 322) are oriented to different directions with a second mutual angle (θ2) when projected on the horizontal plane (HP), and wherein 1OO°≤θ2≤17O° or 19O°≤θ2≤26O°; and the third and the fourth directional radio beams (321, 322) are arranged along a respective portion (P3, P4) of the second horizontally elongated light distribution (311).

The application discloses a kind of low profile multi-mode antennas, belong to antenna technical field.It includes circular patch, sector patch, PCB substrate, metal ground layer, metallized via, metallized via, metallized via and feed network, metal ground layer avoidance hole etc.composition, coaxial connector is provided at feed point;Through the electromagnetic coupling design of circular patch and sector patch on the upper surface of PCB substrate, the antenna bandwidth is widened, and the optimization design of antenna multi-mode is realized by feed network and multiple metallized via.The overall profile height of the antenna is 2mm, which is only 0.022lambda max, the antenna has two feed points, can realize low profile circularly polarized directional antenna radiation mode, and the working frequency band is 3.35GHz-3.53GHz;It can also realize low profile omnidirectional antenna radiation mode, and the working frequency band is 4.66GHz-5.33GHz.The antenna structure is compact, has good wideband characteristics, low cost, light weight, easy to mass production and other characteristics, and can be applied to ground communication and detection field.