182 results about "Directional antenna" patented technology

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 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 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 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 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 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.

The invention relates to the technical field of wireless communication, in particular to a very high frequency omnidirectional antenna array blind area optimization method based on directional antenna supplement, which comprises the following steps of: establishing a very high frequency omnidirectional antenna unit model, and executing free space simulation; constructing at least one directional antenna precise model; constructing a very high frequency reference omnidirectional antenna array model based on an erected base; and simulating the reference model, obtaining an initial radiation pattern, and identifying and recording the orientation and range of the communication blind area. According to the invention, the number and spacing of the directional antennas are optimized through parameterized scanning, the communication blind area of the very high frequency omnidirectional antenna array is accurately eliminated, and the communication reliability is improved; a complete reusable design process is established, the erection of a base model is simplified, and the simulation time and the engineering cost are reduced; a parameter interval in a limited space is defined, and the engineering operability is enhanced; a single / double directional antenna supplement scheme library is formed, different blind areas and resource scenes are adapted, and the practicability is high.

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.

A device for tracking an object, includes means for attaching to said object, a wireless communication circuit, at least two antenna modules having respective positions different from one another, and at least one processor configured to: select one of the at least two antenna modules based on information indicative of a best-oriented antenna module for wireless communication among the at least two antenna modules; transmit or receive one or more signals for tracking said object using the wireless communication circuit and the selected best-oriented antenna module.

The invention provides a railway contact network ratchet wheel on-line monitoring system, in which a solar photovoltaic panel and a storage battery are used for supplying power to a monitoring device in an environment without commercial power, and a power management unit is used for implementing energy management based on load priority; the local processing and communication unit is in wired connection with the data acquisition module at a short distance and establishes a communication link with a monitoring center through a wireless communication network based on an SD-WAN intelligent networking technology at a long distance; a high-gain directional antenna is arranged outside the acquisition box and is connected with a communication module inside the acquisition box; and a digital signal processor is integrated in the communication module and is used for performing forward error correction processing on an antenna transmission signal. According to the on-line monitoring system, the off-grid power supply module solves the power supply problem of the monitoring device in an environment without commercial power; the SD-WAN intelligent networking technology solves the problems that communication depends on physical lines, and the construction and operation and maintenance cost is high; the high-gain directional antenna solves the problems of attenuation of long-distance transmission signals and the like.

A method for determining whether a steerable directional antenna (2) is misaligned with a target (1') The antenna (2) has a main lobe (9), which defines a pointing axis (A) and has a double-curved portion, and a sidelobe (10) which has a locally single-curved portion. The method comprises: establishing a reference axis (B); moving a direction of the pointing axis (A) away from of the reference axis (B); obtaining values of a signal characteristic; estimating a dependence of the signal characteristic on a direction of the pointing axis (A); and determining whether the antenna (2) is misaligned with the target (1'). The dependence is estimated along an elliptical path enclosing the reference axis (B), and communication via the locally single-curved portion is indicated by the dependence having more than two extrema. The method can be used in, for example, telecommunication applications.

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.

Various communication antennas are described, including phased array antennas having multiple antenna elements arranged in an array. The antenna further includes electronic equipment configured to electronically divide the antenna elements into two or more sub-arrays, each sub-array containing a subset of multiple antenna elements. The electronic equipment can dynamically reorient the antenna by electronically dividing the antenna elements into different sub-arrays of antenna elements, thereby affecting the beam pattern of each sub-array.

The invention discloses an S-band unified carrier measurement and control device applied to a spacecraft return tail section, which receives a spacecraft S-band signal through a small omnidirectional / directional antenna and transmits the spacecraft S-band signal to a high-frequency receiving subsystem; the high-frequency receiving subsystem amplifies and converts the signal and inputs the signal into a baseband to realize telemetering demodulation and voice transmission; the transmitting subsystem processes the baseband signal and amplifies and feeds the baseband signal to the spacecraft. Meanwhile, a data analysis module is designed to generate the flight path of the observation station system according to the data analysis data of the control center. The data forwarding control module adopts a multi-thread framework, analyzes telemetering data through a PDXP format, and forwards and executes point selection processing based on a dynamic routing table; the preferential algorithm preferentially selects telemetering data with normal synchronous codes for forwarding, and the priority is determined by the real-time distance between the equipment and the spacecraft. According to the design, the problems that traditional equipment is large in size, low-elevation-angle signals are weak and depend on data transmission forwarding are solved, light weight, close deployment and independent data transmission are achieved, and the measurement and control reliability of a spacecraft returning tail section is remarkably improved.

The application discloses a miniaturized directional antenna for a VDES system and belongs to the antenna field.The miniaturized directional antenna comprises a dielectric substrate, and a first metal patch and a second metal patch are arranged on the two side surfaces of the dielectric substrate respectively.The first metal patch comprises a first main patch and a first bending arm, and the first main patch and the first bending arm are connected and oppositely bent.The second metal patch comprises a second main patch and a second bending arm, and the second main patch and the second bending arm are connected and oppositely bent.The first main patch and the second main patch are oppositely arranged, and the first bending arm and the second bending arm are symmetrically arranged.The first main patch and the second main patch are electrically connected with a feeding structure, so that the antenna is more convenient to install and use.

The utility model relates to a two-way transmission industrial wireless remote controller with a one-to-two function. The two-way transmission industrial wireless remote controller comprises a transmitter part (10), two receiver parts (30), a transmitting antenna (20), a receiving antenna (40) and a crane part (50), the control part (11), the encoder (13) and the first bidirectional high-frequency module (14) of the transmitter (10) are electrically connected with the CPU (16) through the mainboard (12), and the first bidirectional high-frequency module (14) is connected with the directional antenna (20) through a coaxial cable. A second bidirectional high-frequency module (31) of the receiver (30) is connected with double decoders (321 / 322) and double CPUs (331 / 332), and the output end of the second bidirectional high-frequency module (31) controls the crane (50) through an emergency stop relay (34). The transmitter and the receiver realize real-time signal interaction through a bidirectional high-frequency module, and the hardware level is triggered to be automatically closed in case of abnormality; and the receiver adopts a double-decoder and double-CPU redundancy design, so that the power supply of the crane can be cut off when any fault occurs.

A self-organizing directional antenna system (100, 300, 500, 600) has an omnidirectional scanning antenna (102, 302, 502, 602) connected to a processor configured to establish communication with a wireless network having a plurality of radio base stations (RBSs), and to scan and select from the plurality of RBSs. A radio terminal station (RTS) directional antenna (114, 314a-c; 514a-c; 614a-c) is provided. A controller is configured to receive data identifying the selected RBS (96), determine the location of the selected RBS, use the location of the RTS antenna, and the position of the selected RBS, to control the RTS antenna system to connect the RTS antenna to the selected RBS.

A system for identifying vehicle wheel positions includes sensors mounted on each tire of a vehicle. Each axle of the vehicle is associated with a first directional antenna configured to capture wireless output signals from each tire on one side and a second directional antenna configured to capture wireless output signals from each tire on the other side. A data processing unit (e.g., an in-vehicle controller, a remote server) receives output signals from each sensor via at least respective directional antennas and automatically identifies each wheel position on the vehicle based on the mapped relative positions for each of the directional antennas and further based on the detected relative output signal strengths for any tire and / or wheel sensor associated with an axle having a plurality of tires on each side of the vehicle. A switching device may optionally enable selection between each directional antenna for implementation of respective output signals.

The utility model discloses a multi-oscillator directional PCB antenna comprising a reflecting plate, a PCB, at least three groups of oscillators, at least two combiners and at least six radio frequency lines, the PCB is arranged on the reflecting plate, the three groups of oscillators are arranged on the PCB at equal intervals, the combiners are arranged between two adjacent groups of oscillators, and the radio frequency lines are arranged between the combiners. And each group of oscillators are respectively connected with the signal input ends of the two combiners through two radio frequency lines. According to the multi-oscillator directional PCB antenna, the gains of the three groups of oscillators are increased through the combiner, and the radiation angle of the antenna is reduced through the reflecting plate, so that the forward gains are increased, and the high-gain performance can be met.

This invention provides a direction finding method, apparatus, system, and storage medium for a circular array interferometer, belonging to the field of electronic reconnaissance. The method includes: obtaining a radio signal from a directional antenna array element; processing the radio signal to obtain the original phase and original amplitude; correcting the original phase and original amplitude to obtain the corrected phase and corrected amplitude; analyzing the corrected amplitude to obtain coarse direction finding angles; sorting the coarse direction finding angles in descending order to obtain a sequence of coarse direction finding angles, and using the corrected phases of the directional antennas corresponding to the first N coarse direction finding angles in the sequence as the target phase. This invention can achieve instantaneous 360° omnidirectional high-sensitivity and high-precision direction finding, reducing equipment size, power consumption, and cost requirements, and has significant application value, while also improving the accuracy of direction finding results.