300 results about "Directional antenna" patented technology

Aspects presented herein may enable a user equipment (UE) to perform angle-of-arrival (AoA) determination using non-ideal and non-directional antennas. In one aspect, a UE obtains an indication of a phase difference of arrival (PDoA) function related to the first user equipment (UE). The UE obtains a set of PDoA measurements associated with a second UE when the first UE is associated with a plurality of orientations. The UE computes, based on the PDoA function, the set of PDoA measurements, and the plurality of orientations of the first UE, a general function that is associated with a probability in which the second UE is at a set of relative directions compared to the first UE. The UE estimates, based on the computed general function, a relative direction of the second UE compared to the first UE, where the relative direction is included in the set of relative directions.

The invention provides a lightning trajectory data fusion detection based single-tree accurate early warning system for lightning fire, and relates to the technical field of meteorological disaster monitoring and early warning and forest lightning fire prevention and control. The lightning trajectory data fusion detection based single-tree accurate early warning system comprises an electromagnetic radiation receiving module which adopts an antenna array composed of at least four directional antennas to receive electromagnetic radiation signals generated by lightning, the antenna array is connected with a signal conditioning circuit, and the signal conditioning circuit is connected with the electromagnetic radiation receiving module. The signal conditioning circuit amplifies the received weak electromagnetic signal by 100-1000 times, processes the weak electromagnetic signal with a filtering bandwidth of 10 kHz to 1 MHz, and transmits the weak electromagnetic signal to a data acquisition card with a sampling frequency of 5-20 MS / s and a sampling precision of 12-16 bits. By integrating lightning electromagnetic radiation continuous sampling, infrared, visible light and ultraviolet multispectral tracking shooting and atmospheric electric field early warning multi-modal data, a lightning track is accurately detected, and by combining forest environment information, accurate early warning of a single tree where a lightning fire may occur is achieved.

Omni-directional, horizontally polarized antennas are provided. According to one aspect, an omni-directional, horizontally polarized antenna includes a first reflector and a second reflector separated from the first reflector. Disposed between the first and second reflectors are a planar array of radially directed horizontally polarized antenna elements and a planar feed network configured to feed the antenna elements of the planar array. A coaxial feed structure configured to communicate electrical signals to or from the feed network is provided.

The invention relates to the technical field of satellite navigation and wireless communication, and discloses an indoor positioning method and system based on feeder multiplexing Beidou double-frequency, and the method comprises the steps: receiving outdoor B1I and B2a signals through a high-gain Beidou double-frequency receiving antenna, carrying out the frequency separation and signal conditioning through a double-frequency separation filter, and carrying out the positioning of the B1I and B2a signals; and transmitting the B1I signal to an indoor distributed antenna for broadcasting through the existing communication feeder network, and transmitting the B2a signal to a central directional antenna to establish a time synchronization reference. A mobile terminal receives a dual-frequency signal, capturing and tracking are carried out through digital signal processing, and pseudo-range and carrier phase observation values are extracted. And performing pairing processing on observation data of the same antenna, calculating a dual-frequency pseudo-range difference value, eliminating system errors, and performing position calculation by adopting a weighted least square method and Kalman filtering. The method solves the problem that the traditional GPS signal cannot cover the indoor environment, and has a good application prospect in the scenes of underground commercial complexes, tunnels, parking lots and the like.

A satellite communication method, including searching, by a terminal device, for at least one first satellite in a first range by using a first antenna, where the terminal device includes a first directional antenna and a second directional antenna, and the first directional antenna corresponds to first coverage, and the second directional antenna corresponds to second coverage. The first antenna is the first directional antenna and the first range is the first coverage, or the first antenna is the second directional antenna and the first range is the second coverage, or the first antenna is the first directional antenna and the second directional antenna and the first range is the first coverage and the second coverage.

The invention discloses a portable multi-band unmanned aerial vehicle interference method and system based on a directional antenna array, and belongs to the field of unmanned aerial vehicle countering. The invention discloses a portable multi-band unmanned aerial vehicle interference method and system based on a directional antenna array. The method comprises the following steps: detecting and tracking a multi-sensor fused target; generating a multi-band interference signal; multi-band signal interference based on a directional antenna array; the system comprises a detection and tracking module, a signal generation and processing module, a directional interference array module, a main control and interaction module and an integrated platform and support module. The problems that in the prior art, a high-speed maneuvering unmanned aerial vehicle is difficult to track, and a modern unmanned aerial vehicle using multiple communication frequency bands at the same time cannot be effectively handled are solved. The method is high in interference efficiency and long in acting distance, wide effectiveness of unmanned aerial vehicles of different models and different communication configurations is guaranteed, multi-band coverage is achieved, the beam switching speed reaches the millisecond level through electronic beam forming, and the capacity of coping with complex targets is high.

The invention discloses an unmanned aerial vehicle cluster dynamic area coverage method based on deep reinforcement learning. The method comprises the following steps: constructing a multi-physical field coupling simulation environment comprising node motion, a directional antenna, a space channel and a radar detection model; based on the environment, converting a dynamic coverage problem form into a partially observable Markov decision process, a defined state, observation, action and reward mechanism, performing multi-agent training by adopting a centralized training decentralized execution framework, evaluating a joint action by using a global Critic network during training, and storing interactive experience by using an experience playback buffer area; based on a priority experience playback mechanism, according to a time sequence difference error and a reward value, an experience sampling probability is calculated, samples are extracted, Critic and Actor networks are updated in sequence, a decision model is deployed to an unmanned aerial vehicle cluster after training is completed, and each unmanned aerial vehicle executes an area coverage task in a distributed manner, so that efficient and low-risk communication coverage can be realized in a complex threat environment. The communication quality is improved; and the detected probability is reduced.

The invention discloses a pre-planning cluster head pushing method for rapid establishment of a directional network of an unmanned aerial vehicle group, and the method comprises the steps: obtaining a potential candidate cluster first choice set through screening according to the comprehensive energy value of each unmanned aerial vehicle node, and obtaining a candidate cluster first choice set according to the single-beam coverage capability of a directional antenna; redundant unmanned aerial vehicle nodes covering the overlapping area in the potential cluster head candidate set are eliminated to obtain candidate cluster heads, then quantitative evaluation of network communication quality, energy state and topological stability is carried out on the candidate cluster heads, and the unmanned aerial vehicle node with the highest quantitative evaluation score is used as the cluster head; and the unmanned aerial vehicle node with the second highest quantitative evaluation score is used as a standby cluster head, so that the cluster head is determined timely and accurately, and the beam resource utilization rate is improved.

The invention belongs to the technical field of radio frequency thunder and lightning positioning, and particularly discloses a wind turbine generator lightning arresting detection method based on radio frequency electromagnetic detection. According to the invention, the initial layout of the directional antenna is planned through the signal-to-noise ratio, the elevation angle and the number of stations in a constrained manner, thereby overcoming the defects that the omnidirectional antenna is low in signal-to-noise ratio and is liable to be interfered in a wind power plant, and achieving the selective focusing of a target airspace and the collection of high-signal-to-noise-ratio data. And station distribution parameters are iteratively optimized by simulating lightning signals, so that the capability of monitoring lightning stroke areas of key components of the fan is enhanced. Time parameters are accurately extracted by using the high gain characteristic of the directional antenna, and high-precision measurement of the time difference of arrival is ensured in combination with a unified time base alignment technology. Finally, a high-resolution three-dimensional lightning stroke channel form is inversely generated based on a spherical propagation model, the problem of detection interference in a complex environment of a wind power plant is systematically solved, and an accurate three-dimensional observation basis is provided for lightning stroke protection design and accident analysis.

The invention relates to the technical field of communication equipment, in particular to a directional antenna and a control method thereof.The directional antenna comprises a main body, a rotating mechanism, an antenna and a wind speed sensing mechanism, a control center is arranged in the main body, the rotating mechanism is rotatably arranged on the upper surface of the main body, and the side face of the rotating mechanism is an inclined face forming an included angle with the rotating axis; the antenna is vertically arranged on the side face of the rotating mechanism, the wind speed sensing mechanism is located on the upper surface of the body, and the wind speed sensing mechanism is in signal connection with the control center. The antenna has the advantages that the directional antenna is convenient to carry, and the antenna has high stability in a severe environment.

A method and system for object detection and avoidance for an autonomous vehicle is provided. The system comprises a plurality of directional antennas, at least one multi-channel transceiver and a controller. The controller is programmed with computer-executable instructions for detecting, a plurality of radio echo signals from one or more objects, estimating maneuver performance limitations of the autonomous vehicle based on the radio echo signals, and generating at least one collision avoidance maneuver for the at least one autonomous vehicle based on the plurality of maneuver performance limitations and collision risk logic.

The utility model belongs to the technical field of rail transit vehicles, and relates to a mounting structure for a vehicle-mounted WiFi system of a rail transit vehicle. Comprising a directional antenna installation part (1), a passenger room antenna installation part (2) and an AP equipment installation part (3), the directional antenna installation part (1) comprises a directional antenna body (4), the directional antenna body (4) is connected with a first support (5), the first support (5) is connected with a second support (6), and the second support (6) is connected with a directional antenna installation position (7) on a vehicle body (23). The mounting structure for the vehicle-mounted WiFi system of the rail transit vehicle is simple in structure, and can ensure that the vehicle can smoothly and stably access the internet no matter the vehicle runs under any working condition, so that the requirements of passengers are met.

The application relates to the field of antennas and discloses an ultra-wideband omnidirectional antenna and a detection device. The ultra-wideband omnidirectional antenna comprises a conical conductive structure, a grounding conductive structure, a feeding structure and a signal reflection structure. The grounding conductive structure comprises a connecting surface. The top end of the conical conductive structure is connected to the connecting surface of the grounding conductive structure, and the axis of the conical conductive structure is perpendicular to the end surface of the grounding conductive structure. The grounding conductive structure comprises a high-frequency signal end and a low-frequency signal end. The distance from the high-frequency signal end to the top end of the conical conductive structure is smaller than the distance from the low-frequency signal end to the top end of the conical conductive structure. The feeding structure is electrically connected to the top end of the conical conductive structure. The signal reflection structure is connected to the end surface of the grounding conductive structure where the grounding conductive structure is connected to the conical conductive structure, and the signal reflection structure is arranged between the high-frequency signal end and the top end of the conical conductive structure. Through the arrangement, the ultra-wideband omnidirectional antenna can generate gain for radio signals of a lower frequency.

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.

The utility model relates to the antenna technology, and provides a combined antenna device and electronic equipment, the combined antenna device comprises a metal bottom plate, a metal surrounding edge, a directional antenna, an omnidirectional antenna, a power divider, a change-over switch and a radio frequency input interface, the omnidirectional antenna is fixed on the outer side of the metal surrounding edge, the metal surrounding edge is reasonably used as the metal ground of the omnidirectional antenna, and the radio frequency input interface is arranged on the metal surrounding edge. A directional antenna and an omnidirectional antenna are integrated, and the two antennas are ensured to work in a time-sharing manner and do not influence each other by controlling the switching-on and switching-off of the change-over switch; the omni-directional antenna is small in occupied area, size and weight and does not affect installation of the directional antenna, and compared with an existing combined antenna product, the omni-directional antenna is small in size, low in cost and convenient to switch and has great practical use value.

The utility model discloses a temperature measuring device for an enclosed bus, which comprises a directional antenna, a data concentrator, a transmission module and one or more RFID (Radio Frequency Identification)-based temperature sensors, and the temperature sensors are arranged on a metal flexible connector of the enclosed bus; the directional antenna is installed on the side wall of a closed mother cylinder of the closed bus. The temperature sensor is connected with the data concentrator through the directional antenna, the data concentrator is connected with the transmission module, and the transmission module is connected with the upper computer. The temperature of the metal soft connection part of the enclosed bus is acquired through the RFID-based temperature sensor, and the detected temperature is transmitted to the data concentrator through the directional antenna and is uploaded to the upper computer through the transmission module, so that the temperature measurement of the enclosed bus is realized; wireless passive detection can be realized through the temperature sensor based on the RIFD; detection data can be displayed online in real time through the background of the upper computer.

The embodiments of the present application relate to the technical field of antennas. Provided are a terminal antenna and an electronic device. In the solution, provided are a highly directional antenna solution and a specific implementation in the electronic device. The terminal antenna is applied to an electronic device. The electronic device comprises a first side, a second side and a third side, wherein one end of the third side is connected to the first side, the other end of the third side is connected to the second side, and the first side is opposite the second side. The terminal antenna comprises: a first antenna and a second antenna, wherein the first antenna is at least partially disposed on the first side, and the second antenna is at least partially disposed on the second side; a first signal is fed into the first antenna, a second signal is fed into the second antenna, and the phase of the first signal is different from that of the second signal; and the electric field maximum point of the first antenna and the electric field maximum point of the second antenna are both located at the end close to the third side.

An apparatus is provided that includes at least receiver circuitry, a processor, and memory. The apparatus also includes a plurality of directional antennas configured to simultaneously receive different downlink signals for each polarization. The apparatus further includes control circuitry for controlling processes for beam sweeping, beam refinement, and selecting a beam pair that maximizes signal strength while minimizing inter-layer-group interference. A portable electronic device and a stationary electronic device that include the apparatus are also provided. A method carried out by means, such as the apparatus, is also provided. A computer program product, such as a non-transitory computer readable medium, for causing an apparatus to carry out such a method is also provided.

The invention discloses a vital sign monitoring system based on a WiFi signal, which comprises two WiFi CSI data acquisition platforms, a transmitting end platform and a receiving end platform, the transmitting end platform and the receiving end platform are respectively connected with a transmitting end antenna and a receiving end antenna through radio frequency lines, the transmitting end antenna and the receiving end antenna are directional antennas, and the transmitting end antenna and the receiving end antenna are both directional antennas. The beam of the directional antenna points to the chest and abdomen of the human body, the height of the directional antenna is flush with the chest position of the human body, and wave-absorbing materials are arranged on the sight distance paths of the transmitting end antenna and the receiving end antenna. According to the invention, vital signs can be reliably extracted, and separation of breathing and heartbeat signals can be realized. The invention further discloses a vital sign monitoring method based on the WiFi signal.

The invention relates to the technical field of intelligent door locks, and discloses a Bluetooth electronic door lock, an unlocking control method and a storage medium. By arranging the inner and outer Bluetooth modules and comparing the round-trip time and phase / amplitude, accurate judgment of the position of a user is realized in combination with the directional antenna, the inside and outside states of the door are effectively distinguished, the problem of misjudgment caused by the fact that a traditional scheme depends on single signal strength is solved, and the system has the advantages of improving the positioning accuracy and safety and reducing the risk of misoperation.

The invention relates to the technical field of unmanned aerial vehicle detection, and discloses an unmanned aerial vehicle direction finding method, an unmanned aerial vehicle direction finding device, electronic equipment and a computer readable storage medium, the method is applied to the electronic equipment, the electronic equipment comprises an omnidirectional antenna and a directional antenna, and the method comprises the following steps: controlling the omnidirectional antenna and the directional antenna to scan a target area in a surrounding manner, obtaining a first power value sequence and a second power value sequence, determining a ratio of the second power value sequence corresponding to each azimuth angle to the first power value sequence, determining the azimuth angle corresponding to the maximum ratio as a first angle, and performing convolution operation on the second power value sequence and a preset power value sequence corresponding to the directional antenna to obtain a second power value sequence corresponding to the directional antenna; and determining the azimuth angle corresponding to the maximum convolution value in the convolution value sequence as a second angle, and if the error between the first angle and the second angle is smaller than a preset error, determining the second angle as a target angle of the unmanned aerial vehicle relative to the electronic equipment. In this way, the credibility and accuracy of the direction finding result are improved.

This invention provides a wideband airspace radiation device and a wideband anti-unmanned system. The wideband airspace radiation device includes a mounting plate; a first-band radiator is arranged at the center of the mounting surface to provide omnidirectional coverage of the first band; several parasitic elements are arranged circumferentially along the first-band radiator; the second-band radiator employs directional antenna elements, with at least two second-band radiators symmetrically arranged on both sides of the first-band radiator; wherein the parasitic elements are located between the first-band and second-band radiators, and the parasitic elements are used both to guide the electromagnetic field distribution of the first-band radiator and to reflect and guide the electromagnetic waves emitted by the second-band radiator; the several second-band radiators achieve omnidirectional coverage of the second band in a back-to-back configuration. The wideband airspace radiation device provided by this disclosure can eliminate the coverage blind spots of multi-band combined omnidirectional radiators, achieving effective protection of targets.

The application discloses a target direction tracking filtering method based on multi-dimensional motion characteristics. The application combines the actual measurement angle of the target by the directional antenna, the alpha-beta filtering smooth angle, the flight speed of the target, the relative distance of the target, the relative speed vector, the native maneuvering condition and other parameters, and finally comprehensively evaluates the stable target direction. The application is a target direction tracking filtering method based on multi-dimensional motion characteristics. The method can effectively reduce the influence of the interference signal on the target measurement angle without changing the existing TCAS equipment hardware, ensures the accuracy and stability of the target tracking, improves the use satisfaction of the user, and reduces the post-maintenance cost of the equipment after installation.

The invention relates to a device, a system and a method of bidirectional communication between an electronic module (3a) from among a plurality of electronic modules (3a, 3b, 3c, 3d) and a remote control device (20), characterized in that it comprises: - a step of transmission by the remote control device comprising at least two switchable directional antennas (22g, 22d) having different transmission directions, through its at least two switchable directional antennas, of a command in the direction of the plurality of electronic modules; - a step of identification of an electronic module (3a), from among the plurality of electronic modules, identified as being in front of the remote control device, the communication being established only between the remote control device (20) and the electronic module (3a) from among the plurality of electronic modules identified as being in front of the remote control device.Figure for the abridged version: Figure 4.

The utility model discloses a mining directional antenna, which comprises a reflecting plate, a radiating unit, a forming power division network plate, a feed network cable and a radio frequency connector, the radiating unit and the forming power division network plate are both mounted on a first mounting surface of the reflecting plate, and the radio frequency connector is mounted on a second mounting surface of the reflecting plate. The radiation unit comprises a plurality of radiation subunits, the feed network cable comprises a first feed network cable and a second feed network cable, the plurality of radiation subunits are in coupling connection with the forming power division network board through the first feed network cable, and the forming power division network board is in coupling connection with the radio frequency connector through the second feed network cable; wherein the radio frequency band of each radiation subunit is from 1710 MHz to 2700 MHz, and the radio frequency connector is set as an external port. The antenna is high in transmission efficiency, stable in signal receiving and transmitting, high in sensitivity, low in antenna grating lobe and high in multipath interference resistance.

The invention discloses a multi-channel synchronous acquisition electromagnetic radiation source rapid positioning system, relates to the technical field of electromagnetic positioning, and aims to solve the problems that a traditional high-speed rail electromagnetic radiation source positioning system cannot distinguish interference sources inside and outside a vehicle and is insufficient in positioning continuity and accuracy in complex scenes of tunnel GNSS shielding and meeting signal superposition. The system comprises a sensor array module which is used for collecting electromagnetic radiation signals of a target area and comprises an in-vehicle distributed flexible sensor array and an out-vehicle directional antenna array, the in-vehicle array is deployed in a key area in a carrier, and the out-vehicle array covers a three-dimensional monitoring visual angle and realizes omnidirectional collection of signals inside and outside the carrier; the synchronous control module is electrically connected with the sensor array module; the method breaks through the limitation of the prior art from two aspects of acquisition architecture and algorithm logic, thoroughly solves the problem that a traditional system cannot distinguish interference sources inside and outside the train, and effectively guarantees the electromagnetic safety operation and maintenance efficiency of the high-speed train.

The utility model provides an adjustable directional antenna module. The adjustable directional antenna module comprises a first bearing substrate, a second bearing substrate, a signal control chip, a shared conductive structure and a plurality of antenna structures. The first bearing substrate and the second bearing substrate can be matched with each other, so that the first bearing substrate and the second bearing substrate are arranged in a mutually crossed mode. The signal control chip is arranged on the first bearing substrate. The shared conductive structure is disposed on the first carrier substrate. Each antenna structure is arranged on the first bearing substrate or the second bearing substrate. The plurality of antenna structures are electrically connected between the shared conductive structure and the signal control chip. Therefore, when the signal control chip is configured to control whether the voltage passes through at least one of the plurality of antenna structures, the radiation field pattern generated by the adjustable directional antenna module can be adjusted according to the use direction or position of the portable electronic device of a user.

One or more embodiments of the present specification provide a communication networking method of an unmanned aerial vehicle cluster, a storage medium and a program product, applied to a relay unmanned aerial vehicle configured with a plurality of directional antennas in the unmanned aerial vehicle cluster, the plurality of directional antennas including a master control antenna and a relay antenna, the master control antenna being used for establishing a master control connection with an airport; the method comprises the following steps: acquiring an antenna adjustment instruction for a to-be-networked unmanned aerial vehicle, wherein the to-be-networked unmanned aerial vehicle establishes temporary connection with an airport; executing the antenna adjustment instruction to adjust the radiation direction of a target relay antenna to point to the to-be-networked unmanned aerial vehicle, so that the to-be-networked unmanned aerial vehicle is switched from the temporary connection to a relay connection established through the target relay antenna; and constructing a communication network composed of the airport, the relay unmanned aerial vehicle and the unmanned aerial vehicle to be networked based on the master control connection and the relay connection.

The application relates to the technical field of signal shielding devices, in particular to a portable multi-frequency-band shielding device which comprises a device main body, a first shielding unit and a second shielding unit. The first shielding unit is provided with a first antenna module, and the second shielding unit is provided with a second antenna module. The first antenna module is configured as an omnidirectional antenna, so that the shielding device meets the demand of shielding signals of various wireless devices; the second antenna module is configured as a directional antenna, so that the shielding device meets the demand of shielding signals of specific wireless devices; the first antenna module is installed outside the device main body, and the second antenna module is installed inside the device main body, so that the shielding effect of the shielding device on different signals is improved. In this way, the shielding function of the shielding device meets the expected requirement.

The invention discloses an anti-interference directional antenna tracking method based on an acoustic beacon, and the method comprises the steps: 1, carrying out the multi-mode acoustic sensing, collecting the acoustic signals of a target region through an acoustic sensor array, and enabling the acoustic signals to comprise a coding signal transmitted by an active acoustic beacon and a feature noise signal generated by a target, establishing a sound wave-electromagnetic wave bimodal sensing network, and realizing data fusion by adopting extended Kalman filtering; 2, target identification and positioning: estimating the spatial position of a target object by adopting a corresponding positioning algorithm based on the type of the acoustic signal; step 3, adaptive beamforming is carried out, beamforming is carried out by adopting an improved generalized Snell law, and phase compensation provided by acoustic sensing is introduced; the invention relates to the technical field of sixth-generation mobile communication, and the technical scheme has excellent sensing performance and communication reliability in a complex environment, and is suitable for various 6G application scenes such as smart cities, security and protection monitoring, emergency rescue and the like.