69results about How to "Implement beam scanning" patented technology

The invention discloses a dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna. The dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna comprises a dielectric substrate, a reflective structure and an antenna feed source, wherein M*N periodically-arranged metal patch units are etched on the upper surface of the dielectric substrate; M and N are integers, wherein M is greater than 1 and less than 50; N is greater than 1 and less than 50; the reflective structure is positioned on the lower surface of the dielectric substrate; a metal floor structure is adopted; and the antenna feed source is positioned in the upper half space of a radiation structure. By adoption of the dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna, the problem that continuous wave-beam scanning cannot be realized by a conventional microstrip reflective array antenna which can only work in a single-band or single-polarization mode is solved; by employing the metal patch units and variable capacitance diodes, the dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna realizes reconfigurable frequency, reconfigurable polarization and wave-beam continuous scanning, thereby satisfying requirements of a radar and a communication system on multifunctional caliber multiplexing; and therefore, the dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna can be applied to the wireless communication field.

The invention discloses a low-cost and low-profile broadband Massive MIMO antenna unit, comprising a conductor parasitic patch, a conductor coupling sheet, an antenna radiator and a conductor grounding layer which are arranged in turn and at intervals from top to bottom along a vertical straight line, wherein dielectric layers are arranged between adjacent parts. A vertical slot and a horizontal slot are symmetrically arranged at the center position of the conductor coupling sheet, and the vertical slot and the horizontal slot are orthogonal to each other and are used to expand the frequency bandwidth of the antenna. The antenna radiator is provided with a horizontal polarization feed point and a vertical polarization feed point with the feed directions orthogonal to each other. A first isolation slot is arranged at the center position between the horizontal polarization feed point and the vertical polarization feed point. Second isolation slots are arranged on the two sides of the horizontal polarization feed point and on the two sides of the vertical polarization feed point. The first isolation slot and the second isolation slots are used to improve the isolation between the horizontal polarization feed point and the vertical polarization feed point. The low-cost and low-profile broadband Massive MIMO antenna unit has the technical features of wide frequency bandwidth, high degree of isolation, high single-antenna gain, low cost and low profile.

The invention discloses a two-dimensional wave beam scanning antenna array based on SIW (Substrate Integrated Waveguide). The two-dimensional wave beam scanning antenna array comprises structures including an SIW slot antenna, a first medium substrate, a second medium substrate and the like. Compared with a common two-dimensional wave beam scanning antenna array, the two-dimensional wave beam scanning antenna array improves a logic diagram of a two-dimensional wave beam scanning network and further usesmultiple groups of phase shifters with different phase shifting values, so that wave beam scanning of any angle can be realized on both two dimensions, and the gain of each wave beam can be above 11dBi. In addition, the structure is realized by an LTCC (Low Temperature Co-fired Ceramic) technology, an integral structure is designed into a multilayer structure by the multilayer characteristics of the LTCC, energy transmission is carried out among layers through slots, and the dimension of the integral structure is effectively reduced.

The invention provides a broadband two-dimensional beam scanning dielectric resonant antenna and a wireless communication system. The antenna comprises a first dielectric resonator, a second dielectric resonator, a third dielectric resonator, a dielectric substrate, a feed line and a ground plate. The feed line and the ground plate are arranged on both sides of the dielectric substrate. The groundplate is provided with at least two intersecting rectangular slits. The feed line is centered on the intersection of at least two intersecting rectangular slits, and is arranged on one side, which isaway from the ground plate, of the dielectric substrate in a circular arc shape. The first dielectric resonator is arranged between the ground plate and the second dielectric resonator. The second dielectric resonator is arranged between the first dielectric resonator and the third dielectric resonator. The center of the first dielectric resonator, the center of the second dielectric resonator and the center of the third dielectric resonator are in line with the circle center. The feed of the feed line is coupled to the ground plate by the slits and excited, so that the third dielectric resonator rotates to achieve beam scanning. A receiving end can receive a signal.

The invention discloses a high-gain phased array microstrip antenna, which comprises a microstrip antenna array and a microwave lens covering the microstrip antenna array. The gain of the antenna array is improved by using the refraction and convergence characteristics of the microwave lens to electromagnetic waves, and further through controlling the amplitude and the phase of each excitation port in the antenna array, beam scanning is realized, the high gain and the beam control capability of a large-scale phased array antenna can be achieved by using a small-scale phased array antenna finally, and a new solution is provided for realization of a 5G base station based on a large-scale phased array antenna in a low structure complexity and low cost mode.

The invention discloses a phased array circular array antenna system which comprises a circular array antenna. The circular array antenna comprises a circular metal reflector and an antenna unit fixedon the circular metal reflector. Multiple antenna unit groups are distributed along the circumference of the circular metal reflector. A row of antenna elements in the horizontal direction of the circular array antenna is connected to different RF switches according to a certain order, output ends of all RF switch in a row are connected the same secondary power splitter, and an output end of thesecondary power splitter is connected to a phase shifter to form a horizontal antenna array. According to the invention, the non-mechanical signal search and tracking is realized, the directional diagram scanning and tracking of 360 degrees in a horizontal direction and 90 degrees in a vertical direction are carried out on a signal in movement, the search and tracking of the signal are achieved through electric scanning, the reliability is good, the capture time of an electric scanning signal can be calculated in milliseconds, a beam can be changed, different directions can be pointed in scanning and tracking, and complex networking such as relaying can be achieved.

The invention discloses an intelligent skin antenna capable of self-adaptively changing radiation and scattering characteristics, and aims to provide an intelligent skin antenna, which is capable of perceiving an external electromagnetic environment, and adjusting and controlling radiation/scattering characteristics in real time. The scheme in the invention is as follows: a Wearable sensor sends the fact that a radar wave monitoring result exists or not to a single chip microcomputer control unit through a multifunctional device; the single chip microcomputer control unit judges the radiation/scattering mode according to the TTL high and low levels of the address code corresponding to each channel of the multifunctional device; the radiation/scattering performances of the antenna are re-distributed according to requirements; furthermore, a power supply is controlled to apply different voltage values on a polyaniline conductive polymer, so that grading absorption of wave-transmitting radiation or radar wave of the intelligent skin antenna is obtained; in the radiation mode, a weight value obtained through a cloud genetic algorithm in advance is calculated into an amplitude/phase control code, and sent to an active antenna array, so that the low-sidelobe needle beam is realized; in the scattering mode, different voltage values are applied on an electrochromic skin wave-transmitting layer, so that wave absorption is realized; and the low interception probability and the low observable characteristic can be realized self-adaptively.

The present invention provides an interdigital slot unit loaded with capacitance variable diodes and a reconfigurable reflection array antenna. The interdigital slot unit comprises a metal patch layer, a dielectric layer and a metal grounding layer which are sequentially stacked from top to bottom; a transverse slot, a first longitudinal slot, a third longitudinal slot and a second longitudinal slot are formed in the metal patch layer; the first longitudinal slot and the third longitudinal slot have the same length and are symmetrically distributed at two sides of the second longitudinal slot, and the second longitudinal slot has the other length; the first longitudinal slot, the second longitudinal slot and the third longitudinal slot are parallel to one another; the first transverse slot vertically passes through the center of the first longitudinal slot, the center of the second longitudinal slot and the center of the third longitudinal slot; two ends of the transverse slot are respectively loaded with two capacitance variable diodes; and the length setting of the three longitudinal slots satisfies a condition that the resonance frequency of the first longitudinal slot and the third longitudinal slot is 1.2 times to 1.5 times of the resonance frequency of the second longitudinal slot. The aperture efficiency of the reconfigurable reflection array antenna designed on the basis of the interdigital slot unit can reach 74%.

The invention discloses a wide-angle beam scanning reflector antenna which has the advantages of low power consumption, high transmission efficiency and unlimited polarization mode. According to the technical scheme of the invention, an azimuth servo mechanism is connected with a pitch servo mechanism to form a combined two-dimensional servo mechanism; the two-dimensional servo mechanism is connected with a sputter plate (3); a feed source (4) is fixed at the center of the sputter plate through a waveguide feed line (10); a reflector (2) connected by a bent structural member (9) fixedly arranged on an antenna platform (1) is arranged below the sputter plate; the azimuth servo mechanism drives the pitch servo mechanism to drive the sputter plate to rotate around an azimuth rotation axis (7)and a pitch rotation axis (8), so as to realize limited scanning of the pitch plane of an antenna beam and wide angle scanning of the azimuth plane; after an electromagnetic wave is transmitted by the feed source to the reflector, the electromagnetic wave is reflected, defocused and projected onto the sputter plate; and after being reflected by the mirror image of the sputter plate, the electromagnetic wave is emitted.

The invention provides a circularly polarized antenna comprising a linearly polarized antenna source, a circularly polarized lens and a medium lens, wherein the linearly polarized antenna source is used for radiating linearly polarized waves; the circularly polarized lens includes a circular polarization device which is located above the linearly polarized antenna source and used for converting the linearly polarized waves into circularly polarized waves, the circular polarization device comprises a plurality of dielectric grids which are vertically and parallelly arranged, the plurality of dielectric grids are arranged in sequence along the horizontal direction at equal intervals; and the medium lens is connected above the circular polarization device and is used for refracting and converging the circularly polarized waves. The antenna can be used for 5G mobile communication, so that the wider axial ratio bandwidth is achieved, meanwhile, the gain of the antenna is improved, moreover,the wave beam scanning of the antenna is realized, and the antenna is suitable for the scene of mobile communication such as the fifth generation in the future.

The invention discloses a beam scanning method for beam width through superposition design of a plurality of sub-beams. The beam scanning method comprises the following steps: when a base station broadcasts a pilot signal in a cell discovery stage, establishing an expression of cell search delay and the minimum number of scanning beams, and covering the whole area through K times of beam scanning;dividing NT array antennas into M sub-arrays by utilizing a one-dimensional uniform linear array, establishing a sub-array model, giving a total array response, analyzing a relationship between the number M of the sub-arrays and the minimum number K of scanning beams, and adjusting the direction of each sub-beam to realize flexible beam width scanning; and analyzing the relationship between the beamforming gain and the number of array antennas in the expected coverage area, and designing and optimizing the number K of beams with flexible widths to maximize the system capacity. According to the beam scanning method, the scanning number of the beams with the flexible width is optimized, and the expenditure of user discovery is reduced by designing the number of the beams with the optimal flexible width, and the system capacity is greatly improved, and the problem of a coverage gap between user discovery and data transmission is solved.

The invention discloses a monopulse VICTS phased array antenna, which comprises a radiation layer, a parallel plate waveguide layer and a feed network layer arranged from top to bottom, wherein the feed network layer is used for accessing four paths of same TE mode wave signals and carrying out feed processing on the four paths of same TE mode wave signals; four paths of different TEM mode wave signals including a sum beam, a pitch difference beam, an azimuth difference wave velocity and a matched load are obtained and output to a parallel plate waveguide layer, the parallel plate waveguide layer is used for transmitting the four paths of different TEM mode wave signals input into the parallel plate waveguide layer to a radiation layer, and the radiation layer is used for radiating the four paths of different TEM mode wave signals input into the radiation layer to a free space. The antenna has the advantages that the measurement precision of the monopulse technology and the flexibility of the VICTS phased array antenna are effectively combined, beam scanning of the upper half space of the antenna can be rapidly and flexibly achieved at the same time, and meanwhile the tracking speed and the tracking precision are high.

The invention relates to a dual-polarization CTS (Continuous Transverse Stub) beam scanning antenna array. The dual-polarization CTS beam scanning antenna array comprises two orthogonal waveguide power distribution feed structures and a dual-polarization CTS antenna array, wherein the waveguide power distribution structures are connected to the side surface of the CTS antenna array and are used for generating a plane wave; the dual-polarization CTS antenna array achieves H-side scanning along with frequency change. The antenna array achieves H-side beam scanning through the change of the frequency at a port, and can achieve beam scanning of -22 degrees to 9 degrees in the change range of 5.1.6-12.8GHz.

The invention discloses a low-profile broadband dual-circularly-polarized phased-array antenna system, which belongs to the field of antennae, and comprises an antenna array, a radio frequency module and a control module; the antenna array comprises a plurality of antenna units, each antenna unit comprises a dielectric layer and a radiation layer, and a 90-degree bridge is arranged in each dielectric layer; double feeding points are arranged on the radiation layer and are connected with the 90-degree bridge through feeder lines; the radio frequency module is a tile type radio frequency module, and the radio frequency module comprises a plurality of radio frequency channels correspondingly connected with the antenna units; and the control module is used for controlling transceiving switching and polarization selection of the radio frequency module. The tile type radio frequency module is adopted, the connection structure is simple, and cost increase and system loss increase caused by a complex inter-board interconnection mode are avoided; the array is rotated to optimize the axial ratio characteristic; and the 90-degree bridge improves polarization isolation of the antennas when the left-hand circular polarization and the right-hand circular polarization are implemented at the same time, the influence between the two kinds of polarization is reduced, and the formed phased array antenna system is high in integration level, low in profile and low in loss.

The invention discloses a highly-integrated dual-polarized base station array antenna suitable for 2/3/4/5G communication. The antenna is characterized by comprising a dielectric substrate; the frontsurface of the dielectric substrate is a reflecting surface; a low-frequency feed network and a high-frequency feed network are printed on the back surface of the dielectric substrate; n*n low-frequency array antenna units and N*N high-frequency array antenna units are arranged on the reflecting surface; and the low-frequency array antenna units and the high-frequency array antenna units are of up-down layered nested structures. The array antenna disclosed by the invention has the advantages of wide frequency band, double frequency bands and high integration; and the directional diagram, the gain and the lobe width of the array antenna are stable. Due to the fact that different array elements are designed in an up-down layered nesting mode, the structure of the array antenna is compact, and the size and profile of the array antenna are greatly reduced.

The invention discloses a metasurface-based heterogeneous integrated terahertz front end and a manufacturing method thereof. The metasurface-based heterogeneous integrated terahertz front end comprises a shell; a fourth cover plate of an n-shaped structure is arranged at the top of the shell; a cavity is formed by the fourth cover plate and the shell; a metasurface and a reflecting face are arranged in the cavity; the metasurface is made of an insulating medium material with electromagnetic parameters; a metal film coats the insulating medium material; a terahertz circuit, a power source paneland a control panel are arranged in the shell, wherein the power source panel is connected with the terahertz circuit, the control panel and the metasurface, and the control panel is connected with the terahertz circuit and the metasurface; a feed source is further arranged in the shell; and electromagnetic waves generated by the terahertz circuit can be radiated to the reflecting face through the feed source. Beam scanning is realized without adding an external mechanical device so that the size, weight and cost advantages of the metasurface-based heterogeneous integrated terahertz front endcan be further expanded, and the requirement of engineering application of terahertz front-end products can be met.

The invention discloses a micro-strip printed ultra-wideband log periodic antenna. The antenna comprises an antenna layer micro-strip plate, a feeder line layer micro-strip plate, a metal reflection plate and a radio frequency connector; a log periodic antenna is printed on the antenna layer micro-strip plate; the antenna layer micro-strip plate is vertically mounted on the metal reflection plate;the feeder line layer micro-strip plate is adhered to one side of the antenna layer micro-strip plate; the log periodic antenna and the feeder line layer micro-strip plate are mounted on the same side; the feeder line layer micro-strip plate is in feed connection with the log periodic antenna; the radio frequency connector is connected with the bottom end of the feeder line layer micro-strip plate; and a feed point is arranged at a near-ground end. The invention further discloses an antenna array. The micro-strip printed ultra-wideband log periodic antenna has the beneficial effects that thefeed point is arranged at the near-ground end of the log periodic antenna, so that the feed problem of the micro-strip printed ultra-wideband log periodic antenna during working at a relatively high frequency is solved; traditional far-ground end feed is converted into near-ground end feed, so that the influence of feeder lines on the log periodic antenna is reduced as much as possible; and the micro-strip printed ultra-wideband log periodic antenna has relatively good electrical performance and radiation performance.