17 results about "Planar array antenna" patented technology

The utility model relates to a flat plate array antenna technology, and especially relates to a 45-degree low-sidelobe flat plate array antenna. The antenna comprises a radiation layer, a back cavity layer and a feed layer. A radiation layer is laminated above a back cavity layer, the back cavity layer is laminated above a feed layer, and the feed layer is used for outputting 4 * 4 paths of TE10 mode signals; the radiation layer is provided with 4 * 4 input ends and 4 * 4 output ends, the 4 * 4 input ends of the radiation layer are used for accessing 4 * 4 paths of TE10 mode signals output by the feed layer in a one-to-one correspondence manner through transfer of the back cavity layer, and the 4 * 4 output ends of the radiation layer are used for radiating the 4 * 4 paths of TE10 mode signals output by the feed layer to a free space in a one-to-one correspondence manner. The low side lobe flat plate array antenna is simple in structure, low in cost, easy to realize batch production, wide in frequency bandwidth and high in efficiency.

The invention discloses an array and difference beam co-excitation optimization method and system based on unit dynamic range ratio constraint and a storage medium, and mainly solves the problem that an array and difference beam directional diagram cannot be optimized in a complex application scene and the dynamic range ratio cannot be reduced at the same time in the prior art. The implementation scheme comprises the following steps: determining an antenna optimization index; optimizing the planar array antenna and the difference beam directional diagram by adopting a convex optimization algorithm, and solving the planar array antenna and the difference beam directional diagram to obtain an initial sum beam complex excitation coefficient meeting a constraint condition; adding a unit dynamic range ratio constraint in a planar array antenna and difference beam directional diagram optimization problem, and converting the directional diagram optimization problem after adding the unit dynamic range ratio constraint into a series of convex optimization sub-problems; iteratively solving the convex optimization sub-problem by using a solver to obtain an optimal sum beam excitation coefficient; and synthesizing a sum and difference beam directional diagram of the array according to the optimal sum beam excitation coefficient. According to the invention, the sum-difference beam synthesis with a small dynamic range ratio can be effectively realized while the radiation performance constraint is satisfied, and the method can be used for a monopulse radar system with a cover.

This invention discloses a UAV backscatter communication method and related device based on the integration of sensing, communication, and energy. The invention uses a UAV equipped with a uniform planar array antenna as a dual-function access point in the air, transmitting communication and sensing multiplexed signals to ground-based IoT devices and potential sensing targets. Ground-based IoT devices can choose to collect energy from the signal or modulate their own information onto the transmitted signal and reflect it back to the UAV, thereby completing energy transmission and information collection tasks respectively. By using an alternating optimization algorithm to optimize the UAV's flexible mobility, beamforming spatial control capabilities, and device scheduling capabilities, the average total throughput of the device backscatter return link can be maximized while meeting the sensing performance and energy collection requirements of IoT devices. This achieves deep synergy between sensing, communication, and energy supply, thereby realizing resource reuse and transmission performance balance across multiple tasks.

The invention discloses a spatial three-dimensional fixed-point secure transmission method based on a planar array, constructs a spatial three-dimensional fixed-point secure transmission architecture based on a planar array antenna, and solves the problems that aiming transmission can only be realized in a two-dimensional space based on a linear frequency control array antenna, and accurate fixed points in a vertical distance of a three-dimensional space cannot be realized. By means of a beam forming algorithm based on weighted vector product optimization, the problems that planar frequency control array beam forming is high in complexity and poor in main lobe energy focusing degree are solved.

The invention discloses a one-dimensional unfolding planar array antenna unfolding mechanism, which comprises an unfolding mechanism base, an unfolding mechanism and an antenna panel, and is characterized in that the unfolding mechanism base is connected with the unfolding mechanism; the unfolding mechanism is used for supporting the antenna panels and providing structural rigidity support after being completely unfolded, the unfolding array surface of the unfolding mechanism is large, and the unfolding mechanism is used for enabling the antenna panels to be finally arranged in the same plane. According to the invention, while the storage ratio and the unfolding size of the antenna are improved, the rigidity of the unfolding mechanism is improved under the condition of ensuring light weight. The mechanism also has a modular expansion function, the number of modules is large, and the expansion array surface is large.

A superstate for a planar array antenna that includes a first major surface and an opposing surface facing a substrate of the planar array antenna where the opposing surface includes at least one first surface location and at least one second surface location that is positioned closer to the substrate than the at least one first surface location.

The application relates to a beamforming Doppler radar microstrip planar array antenna, which comprises a microstrip antenna layer, the microstrip antenna layer comprising a first microstrip series feed array group and a second microstrip series feed array group; the first microstrip series feed array group comprising a plurality of parallelly arranged first series feed arrays; the plurality of first series feed arrays having a first parallelogram shape; the first microstrip series feed array group comprising a plurality of parallelly arranged second series feed arrays; the plurality of second series feed arrays having a second parallelogram shape; the number of the first series feed arrays and the second series feed arrays being equal, and the first series feed arrays and the second series feed arrays being arranged at intervals; the first parallelogram and the second parallelogram being completely identical in shape and intersecting with each other, and the first parallelogram and the second parallelogram being symmetrical about the intersection line axis after intersection. The Doppler radar microstrip planar array antenna has better beamforming capability, the antenna main beam has gamma-psi separable characteristics, and the structural performance is more convenient to use.

The present invention discloses a forward-looking three-dimensional imaging technology for an airborne radar based on a two-dimensional super-resolution algorithm. A planar array antenna is used to receive scattered echoes from targets in the area in front of the carrier aircraft. After pulse compression and range migration correction are performed, the observation area is gridded and azimuth-elevation echo modeling is completed. For each two-dimensional snapshot data, a weighted least squares criterion is used to construct a cost function with weights. The parameters are iteratively updated until the estimation results converge to obtain a single azimuth-elevation super-resolution spectrum. Two-dimensional spectrum incoherent accumulation is performed on several super-resolution spectra of the same range gate to obtain three-dimensional super-resolution data in polar coordinates. Finally, the polar coordinate data is transformed into a spatial rectangular coordinate system and plotted to obtain forward-looking three-dimensional super-resolution imaging. The present invention only requires a single snapshot to complete azimuth-elevation two-dimensional super-resolution, which overcomes the disadvantage that a moving platform cannot accumulate a large number of snapshots for the same observation target while further improving the imaging resolution.

The present invention achieves a planar array antenna having increased flexural strength. Provided is a planar array antenna 110 in which a plurality of radiating elements are arranged along one direction on a dielectric substrate. The planar array antenna 110 comprises a common ground conductor plate 113 which is provided so as to be shared by the plurality of radiating elements. Planar antenna regions 110a, which respectively correspond to the radiating elements 111, have a common ground conductor plate 113 that is provided in parallel in the arrangement direction of the plurality of radiating elements 111 and a pair of ground conductor patterns 112a, 112b that are connected via a via conductor VI. A first dummy pattern DP1a, DP1b is provided between ground conductor patterns 112a, 112b which are adjacent to each other in the arrangement direction.

The application provides a ubiquitous signal enabling positioning and pose measurement method based on least square residual, comprising: one, establishing a global coordinate system and a user terminal array antenna body coordinate system, and determining a conversion relationship; two, a user-l simultaneously receives signals of M ubiquitous signal base stations by using an H*V rectangular plane array antenna; three, array signal processing is performed at the user terminal, and signal arrival angles of the signals transmitted by the M ubiquitous signal base stations at the user-l are measured based on a MUSIC algorithm; four, the user-l combines M sets of signal arrival angle information and position coordinates of the ubiquitous signal base stations in the global coordinate system, and solves position coordinates and attitude angles of the user-l in the global coordinate system based on a least square residual multi-ubiquitous signal base station enabling user positioning and pose measurement method. The application solves the problem that a signal system is heterogeneous in an Internet of Things positioning scene in the prior art, thereby causing hardware structure redundancy and high system complexity, guarantees the ability to provide continuous positioning services for users, and effectively improves network service life.

A feed network device, which is electrically connected to unit radiating elements for circular polarization, may comprise a phase offset compensation circuit configured to correct a phase dispersion error according to a change in frequency so that four quarter arrays obtained by vertically and horizontally dividing a planar array of the unit radiating elements symmetrically are electrically and rotatably sequentially disposed clockwise or counterclockwise.

The invention discloses a low-delay and high-reliability satellite-ground covert communication system and method, and belongs to the technical field of wireless communication, and the method comprises the steps: monitoring a ground monitor Willie through a satellite Alice, and carrying out the communication with a plurality of ground receivers; the satellite Alice is provided with a planar array antenna, the ground receiver is provided with a single antenna, and the ground monitor Willie is provided with two antennas; a wireless channel link between the satellite Alice and the ground receiver is a downlink channel, the ground receiver comprises a hidden ground user and a confidential ground user, the satellite Alice respectively sends a hidden signal and a confidential signal to the hidden ground user and the confidential ground user, and the ground monitor Willie detects the transmission of the hidden signal, so that a communication system with low time delay and high concealment is obtained.

The utility model relates to a broadband compact low-sidelobe planar array antenna, which comprises a dielectric substrate layer, a radiation patch and a feed network which are arranged on the upper surface of the dielectric substrate layer, a metal floor layer which is arranged on the lower surface of the dielectric substrate layer, and a coaxial port which is arranged at the central position of the feed network. The radiation patch is connected with the feed network, a central signal hole and peripheral grounding holes of the coaxial port penetrate through the dielectric substrate layer, one end of the central signal hole is connected with the feed network, the other end of the central signal hole is separated from the metal floor layer, and the lower layer of the peripheral grounding holes is connected with the metal floor layer; the metal floor layer is provided with rectangular windows which are arranged in an array mode to form a surrounding ground structure so as to improve impedance bandwidth. According to the utility model, the metal floor layer is provided with the rectangular window, and the umbrella-shaped radiation patch is used for widening the impedance bandwidth, so that the wider impedance bandwidth is realized.

The invention relates to a Beidou pseudo satellite signal simulation generation method and system and a storage medium. Comprising the following steps: generating a baseband signal; generating a spreading code; performing digital orthogonal up-conversion; performing radio frequency processing; and transmitting the planar array antenna. By introducing the Beidou pseudo satellite technology, the geometric configuration of satellite distribution is optimized, and the positioning precision is improved. After the Beidou pseudolite is introduced, in order to facilitate joint calculation with a real satellite signal, a high-precision taming crystal oscillator is selected to be combined with a time synchronization correction algorithm, nanosecond-level synchronization of pseudolite and BDS time is guaranteed, and the time synchronization problem is solved. And finally, in order to enable the receiver to normally and stably receive the Beidou pseudo-satellite signal and the navigation satellite signal which are produced in a simulation manner and suppress the near-far effect, the signal is fed back through the receiver, and the power parameter of the Beidou pseudo-satellite transmitting signal is dynamically adjusted. Through collaborative optimization of self-defined frequency bands, clock synchronization and power regulation, the positioning availability is improved to 95% from 68% in a complex environment, and the elevation precision is optimized by 65%.

The application discloses a sparse cloth plane array antenna optimization method and system, and the method comprises the following steps: constructing a multi-objective optimization model of a sparse cloth plane array antenna by taking minimization of a peak side lobe level and minimization of a main lobe width as an objective function; and solving the multi-objective optimization model according to a preset multi-strategy nonlinear multi-objective particle swarm algorithm to obtain an optimal antenna array distribution scheme. The method has superior global search capability and higher solution accuracy, and can achieve the optimization target of a sparse cloth antenna array.

Disclosed is a metasurface structure antenna within a waveguide. This metasurface structure antenna within a waveguide includes: a waveguide which has an opening formed at an end thereof and in which the width of the perimeter of a rectangular or circular structure gradually decreases from the end thereof; and a metamaterial antenna having a 3D stacked structure, mounted inside the waveguide and having negative (-) permittivity and permeability in a specific frequency band. The metamaterial antenna having a 3D stacked structure includes: k dielectric substrates, each having the same metal pattern formed thereon; a connector in which the k dielectric substrates having the metal pattern formed thereon are stacked in a 3D stacked structure and connected to each other by a signal line, the signal line being provided on a cylindrical center line; ground provided on an outer edge that surrounds the connector and the k dielectric substrates having a 3D stacked structure on which the metal pattern is formed; and port 1 and port 2 for input and output. The metasurface structure antenna having a 3D stacked structure within an open-ended waveguide having an opening formed at an end thereof (metamaterial antenna having a 3D stacked structure) may implement, while most existing metamaterial antennas have a planar array antenna structure in an M / W region, a metamaterial antenna having a 3D stacked structure, in which a plurality of dielectric substrates, each having a metal pattern, are stacked and mounted within an open ended waveguide which has an opening formed at an end thereof and in which the perimeter of a rectangle gradually decreases, thereby integrating electromagnetic waves and reducing the angle of a frequency, a direction in which the gain of the antenna increases, and the circuit size of the metamaterial antenna having a 3D stacked structure.

The invention discloses a feed network device based on transverse multi-channel SIW slot array coupling. The feed network device sequentially comprises a first dielectric substrate sub1, a middle layer metal clad copper, a second dielectric substrate sub2 and a bottom layer metal clad copper from top to bottom. According to the device, the slot coupling feed technology is combined with the SIW, the feed network has the advantages of being low in transmission loss and beneficial to integration, the transmission efficiency is high, in the SIW slot array coupling microstrip line structure, slots correspond to output ports one to one, and the antenna efficiency is improved. Independent regulation and control of target feed amplitude and phase values, amplitude and phase can be realized by adjusting the size and offset of the gap and the size of the upper microstrip line, the antenna can be adapted to any planar array antenna, any amplitude and phase feed distribution requirement can be realized, and the problems of large insertion loss and low power consumption of the existing medium and large array antenna feed network are solved. And on the premise of ensuring high transmission efficiency, multi-target transmission and accurate amplitude and phase regulation, the simple design of the structure can be maintained.