18 results about "Reconfigurable antenna" patented technology

The application provides an AP, an AP deployment system and a method for reducing AP co-frequency interference, and relates to the technical field of communication equipment. The AP comprises a reconfigurable antenna, the reconfigurable antenna has a switchable first polarization direction and a second polarization direction, and the first polarization direction is orthogonal to the second polarization direction. The AP, the AP deployment system and the method for reducing AP co-frequency interference provided by the application switch the polarization direction of the reconfigurable antenna in the AP, so that the polarization directions of the reconfigurable antennas in two APs of the same frequency are orthogonal, and thus the co-frequency interference between the APs is reduced or eliminated.

The application discloses a two-bit phase control low-sidelobe super surface antenna, which comprises a rectangular patch antenna as a design principle to realize K-band electromagnetic wave radiation; a path equivalent electric length switching phase shifter and a patch current direction switching phase shifter are combined, the on-off state of a PIN diode in the phase shifter is changed, and 2bit modulation of the radiated electromagnetic wave is realized; a fan-shaped stub is added to a direct current control feeder line of the PIN diode to realize isolation between radio frequency signals and direct current signals; a phase reconfigurable antenna unit is combined with a Chebyshev unequal power distribution network to realize sidelobe suppression effect; a K-band low-sidelobe phase reconfigurable antenna model is combined, electromagnetic simulation software is used to optimize geometric parameters of the K-band low-sidelobe phase reconfigurable antenna model, and radiated electromagnetic responses of the design model are output; and overall antenna design is performed based on the designed unit model.

This invention discloses a physical layer key generation method and system based on a polarization-reconfigurable antenna, belonging to the field of wireless communication technology. The method includes: establishing a polarization channel model jointly considering polarization correlation, spatial correlation, and channel depolarization effects, and deriving a closed-form expression for the key generation rate; constructing a joint optimization problem of beamforming vector and PRA phase shift vector under base station transmit power constraints and antenna phase modulation constraints, with the goal of maximizing the key generation rate; solving the problem using an alternating optimization method to obtain the optimal beamforming solution based on the Rayleigh quotient and the analytical closed-form solution for polarization phase modulation jointly determined by the polarization channel correlation coefficient, inverse cross-polarization discrimination, and receiver polarization vector. This invention requires no additional RF link, has low hardware complexity, effectively mitigates performance loss caused by polarization mismatch, and significantly improves key generation efficiency and system security in complex polarization environments.

A reconfigurable antenna and a communication device having the reconfigurable antenna include a substrate, a first electrode layer, a second electrode layer, a conductor, two ground wires, and two switches. The substrate has a first surface, a second surface, and a slot penetrating both surfaces. The first electrode layer has a first groove passing through the slot. The second electrode layer has a second groove passing through the slot. The conductor is located within the slot. The two ground wires are located on opposite sides of the first electrode layer. The two switches are located between the first electrode layer and the ground wires. When each switch is connected to its corresponding ground wire, the antenna forms an omnidirectional radiation pattern; when each switch is disconnected from its corresponding ground wire, the antenna forms a directional radiation pattern.

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.

The application relates to the technical field of wireless communication and radio frequency antennas, and provides a self-sensing beamforming antenna system and method for an outdoor camera, which comprises the following modules: a reconfigurable antenna array module containing at least two antenna radiation units, each feeding point being connected with an independent adjustable matching network to regulate and control the phase / amplitude; a radio frequency tuning and control module containing an adjustable matching network and a driving circuit, the driving circuit receiving a digital control signal of a master decision unit and converting the signal into an analog voltage to be applied to a phase shifter; a channel sensing and processing module integrated in the camera, periodically acquiring and analyzing channel state information from a wireless router; and a master decision unit, which performs the whole process logic of scanning, calculation, locking and tracking, and automatically triggers re-optimization when the link degradation reaches a threshold. The application constructs a self-contained and self-sensing beamforming architecture on the camera side, realizes autonomous link optimization and dynamic beam regulation independent of network side devices, and improves the connection reliability.

Embodiments are disclosed for an example telematics system for a vehicle. The telematics system includes a reconfigurable antenna including an antenna portion, a coupling portion, a radiation switch, and a frequency switch. The telematics system further includes a plurality of antennas, and a processor with instructions stored in non-volatile memory to link one antenna of the plurality of antennas to the satellite based on a predicted overlap between a stored radiation pattern of the one antenna and a calculated azimuth and elevation angle of the satellite.

The application discloses a kind of based on the multi-wave multi-time ground penetrating radar system of cooperative modulation, belong to geophysical prospecting field.The system includes cooperative control and signal processing center, multi-waveform cooperative transmitting module, reconfigurable antenna array module and multi-channel cooperative receiving module.Through cooperative control center scheduling, transmit multiple orthogonal or quasi-orthogonal modulation waveforms, use reconfigurable antenna array for multiple spatial sampling, finally the echo data of multi-wave multi-time is cooperatively fused and processed and jointly inverts imaging.The application effectively cooperates the detection depth and resolution, significantly improves the anti-interference ability of system, information acquisition dimension and target identification accuracy, and is suitable for high requirement detection scene in the fields such as geological exploration, civil engineering detection, archaeology etc..

The application discloses a broadband continuous phase reconstruction high-gain metasurface antenna, which comprises the following steps: taking a U-shaped slot patch antenna as a design principle, designing a high-gain broadband antenna, and having an air layer in the middle to realize efficient electromagnetic wave radiation in a wide frequency range; combining a reflective phase shifter, adjusting the capacitance value of a loaded varactor diode, realizing continuous modulation of the phase of the radiated electromagnetic wave, and realizing unit decoupling in the antenna array through a direct current isolation structure; combining a high-gain broadband phase reconfigurable antenna model, optimizing the geometric parameters of the model by using an electromagnetic simulation software, and outputting the radiation electromagnetic response of the design model; and designing the whole antenna based on the designed unit model.

The application relates to the technical field of wireless communication, and discloses a polarization beamforming method for a space-air-ground integrated network with simultaneous transmission of energy and information, which comprises the following steps: constructing a space-air-ground integrated network comprising a ground wireless energy station, multiple unmanned aerial vehicles and low-orbit satellite nodes, and configuring a polarization reconfigurable antenna for each node; setting a time division multiple access protocol for the network; collecting time slots and polarization phase shifts of the network in a wireless energy collection stage and an information transmission stage; constructing a total throughput calculation model of the low-orbit satellite, taking the maximization of the total throughput of the low-orbit satellite as an optimization target, taking time slot scheduling and polarization phase shift as constraints, constructing a total throughput model of the network and solving the model; and substituting the optimal polarization phase shift and the optimal time slot allocation result into the total throughput calculation model to obtain the maximum total throughput of the network, so that the optimal balance between the energy transmission efficiency and the information transmission performance of the network is realized; the application realizes transmission optimization with high throughput, high energy efficiency and high reliability, and significantly improves the network transmission performance.

This invention relates to the field of antenna technology and discloses a polarization-reconfigurable antenna, including a substrate, a feed module, and an antenna module. The substrate has opposing first and second surfaces. The first surface has a feed slot and defines a first direction, a second direction, and a third direction. The feed module is disposed on the second surface and coupled to the feed slot. The antenna module includes a first radiating element and several second radiating elements with metal apertures. The first radiating element and the several second radiating elements are all disposed on the first surface and cover the feed slot. The first radiating element and the several second radiating elements respectively form linearly polarized, right-hand circularly polarized, and left-hand circularly polarized dielectric resonators in the first direction, the second direction, and the third direction. Through this method, this invention can control the polarization state of the antenna module by housing a metal pillar through a metal aperture, thereby eliminating the need for a complex feed module, simplifying the overall antenna structure, and reducing costs.

A low-profile quad-polarized null-reconfigurable antenna includes: dielectric substrates one and two, and dipole ring arrays printed on the upper surfaces of dielectric substrates one and two, respectively, fed via button RF connectors; dielectric substrate three, and a dual-polarized microstrip antenna printed on the upper surface of dielectric substrate three, fed via two button RF connectors; dielectric substrate four, and a quasi-monopole printed on the upper surface of dielectric substrate four, fed via a button RF connector and a power divider network; dielectric substrate five, and a microstrip line feeding network printed on the upper surface of dielectric substrate five; a metal ground plane; and four dielectric pins for connecting the dielectric substrates and the metal ground plane. The antenna of this invention can be used for arbitrary polarization synthesis, thereby covering a communication space in a half-sky region.

Embodiments are disclosed for an example telematics system for a vehicle. The telematics system includes a reconfigurable antenna including an antenna portion, a coupling portion, a radiation switch, and a frequency switch. The telematics system further includes a plurality of antennas, and a processor with instructions stored in non-volatile memory to link one antenna of the plurality of antennas to the satellite based on a predicted overlap between a stored radiation pattern of the one antenna and a calculated azimuth and elevation angle of the satellite.

The application provides a frequency reconfigurable antenna and a control method of the frequency reconfigurable antenna, and belongs to the technical field of communication. The antenna main radiator is divided into M sections, and a variable capacitance diode is introduced at the connecting feed line of adjacent radiators, so that the antenna with fixed physical form is converted into a composite resonant network with continuously adjustable reactance parameters. When the control voltage adjusts the capacitance value of the variable capacitance diode, the change of the capacitance directly acts on the radio frequency energy coupling process between adjacent radiators, changes the phase delay and distributed reactance of the signal, and thus accurately adjusts the effective electrical length and resonant frequency of the antenna.

The application discloses an array sidelobe level suppression method through reconfigurable antenna unit optimization selection, and belongs to the technical field of wide array beam scanning. The application further narrows the search space by effectively cutting unnecessary reconfigurable pattern element REP combination in a scanning beam, and obtains a better REP combination according to beam direction change, so as to realize array sidelobe level suppression based on reconfigurable antenna unit optimization selection with lower calculation complexity. The application can adaptively match a corresponding directional diagram mode according to application requirements with different scanning angles, can further effectively reduce the sidelobe of an array antenna, can realize a wider scanning angle, can increase the effective coverage range of an array system, and can effectively improve the power coverage range of the array system.

This invention relates to a multi-objective optimization method for pixel antennas based on the BPSO-MLP algorithm, applied in the field of wireless communication antenna technology. An improved binary particle swarm optimization algorithm is used to perform a global search in the high-dimensional discrete coding space of the pixel antenna. A dynamic temperature parameter is introduced to adjust the shape of the sigmoid mapping function, and a probability-driven mutation mechanism is employed to effectively balance exploration and development capabilities. A performance prediction model is established through a designed multilayer perceptron neural network, enabling rapid and accurate prediction of key performance indicators such as bandwidth, gain, and radiation pattern of candidate antenna structures. An intelligent optimization mechanism submits the high-potential solutions selected through prediction to full-wave electromagnetic simulation, and the simulation results are fed back to the optimization algorithm to dynamically update the prediction model. This invention effectively solves the problems of high-dimensional discrete search, high simulation costs, and coordination of multiple performance indicators in multi-objective optimization of pixel antennas, providing an efficient solution for the design of reconfigurable antennas for next-generation communication systems.

An implementation scheme of an example telematics system for a vehicle is disclosed. The telematics system includes a reconfigurable antenna comprising an antenna section, a coupling section, a radiation switch, and a frequency switch. The telematics system also includes: a plurality of antennas; and a processor having instructions stored in non-volatile memory for linking one of the antennas to the satellite based on a predicted overlap between a stored radiation pattern of one of the antennas and a calculated azimuth and elevation angle of the satellite.

The application discloses an active metamaterial with a coding switch control array and a preparation method. The metamaterial comprises, from top to bottom, a dielectric layer, a controllable super surface layer, an air layer, a reflection layer and an independent switch feed control layer; the controllable super surface layer comprises metal strip patch unit structures which are alternately connected and distributed in a rectangular array, and PIN diodes loaded in gaps between adjacent metal strips; the independent switch feed control layer is composed of an anode feed line, a cathode feed line and a coding switch control array; the PIN diodes are connected with predetermined electrodes in the controllable super surface layer through the anode and cathode feed lines via metal through holes. The application solves the problems of narrow working bandwidth and single function of traditional electromagnetic regulation and control devices, and the dual-mode working characteristics can effectively adapt to complex electromagnetic environment changes, thereby providing core technical support for the development of a new generation of intelligent skin, a reconfigurable antenna system and a multifunctional radar cover, and having a wide application prospect in the field of military and civilian integration.