199 results about "Reconfigurable antenna" patented technology

The invention discloses a directional diagram reconfigurable antenna capable of switching feed through an MEMS switch, and belongs to the field of radio frequency front-end devices. The directional diagram reconfigurable antenna is composed of a micro-strip radiation unit, a guide parasitic unit, a composite beam ohmic contact type MEMS switch, a one-to-four feed network, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradual change micro-strip line, a dielectric substrate and a metal ground backboard. The two-stage MEMS switches are erected on the one-to-four feed network, when the two-stage switches on a certain feeder line are turned on, radio frequency current can flow to the corresponding basic radiation unit through the feeder line to generate an inclined beam facing the quadrant, and the two basic radiation units on the front side can be enabled by simultaneously turning on the four switches on the front side to generate an inclined beam facing the quadrant. And generating an inclined beam in the front side positive direction. The antenna adopts a single-layer board design, the dielectric substrate does not need to be punched, the structure is simple, manufacturing is convenient, the adopted MEMS switch is small in loss and high in isolation degree, and rapid printing and manufacturing can be achieved through the surface etching process.

The invention provides a frequency, polarization and directional diagram reconfigurable antenna unit and array. The antenna unit comprises a tuning microstrip antenna unit and a reconfigurable feed phase-shift network which are stacked, the tuning microstrip antenna unit comprises a circular radiation patch etched with a circular gap and four variable capacitance diodes bridged on the circular gap; two output ports of a Wilkinson power division network in the reconfigurable feed phase shift network are respectively connected with two feed point micro-strips through PIN diodes, and four feed points form a structure which is in space symmetry and asymmetric in impedance. The circular radiation patch and the annular radiation patch in the antenna unit have continuity in structure, only four variable capacitance diodes are loaded on the annular gap, gain fluctuation is reduced, and the antenna unit is fed through four feed points which are symmetrical in space and asymmetric in impedance, so that the antenna unit is more stable in performance. Good matching can be kept between the feed phase-shifting network and the antenna unit in a broadband range, and the tuning bandwidth of the antenna is widened.

The invention discloses a monopole directional diagram reconfigurable antenna based on RF MEMS switch control, and belongs to the field of radio frequency front-end devices. The antenna is composed of a monopole radiation unit, parasitic units located on the left side and the right side of the monopole radiation unit, a composite beam ohmic contact type MEMS switch, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradient microstrip line, a dielectric substrate and a metal ground backboard. When the MEMS switch on the parasitic unit is switched on, the length of the parasitic unit is slightly smaller than that of the monopole radiation unit, and the parasitic unit plays a role of a director. When the MEMS switch is turned off, the first-stage leading unit is divided into two parts from the fracture, the length of the first-stage leading unit is far smaller than that of the monopole radiation unit, and backflow is generated by the open circuit of the terminal, so that the effect of reducing and offsetting the second-stage leading unit is achieved. When the switch on one side is pulled down, a directional diagram generates beam deflection towards the side where the switch is closed, the adjustable deflection angle can reach 41 degrees, the gain can reach 6.14 dB, the beam width is about 90 degrees, when the switches on the two sides are both switched off, the beam deflection is 0 degree, the directional diagram points to the positive Z axis, and the gain is 5.15 dB.

The invention discloses a millimeter wave polarization and directional diagram reconfigurable antenna, and belongs to the field of radio frequency front-end devices. The antenna is composed of symmetrical rectangular radiation patches, and a semicircular defect, a quarter circle defect, a rectangular branch load, an orthogonal bidirectional feed network, a T-shaped power dividing feed network, a composite beam ohmic contact type MEMS switch, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradient matching structure, a dielectric substrate and a metal ground backboard which are located on the radiation patches. When the single-side MEMS switch on the T-shaped power dividing feed network is switched on, energy flows to the radiation unit on the side, and the leftward or rightward wave beam inclination effect can be achieved. When the MEMS on the two sides are both switched on, the radiation pattern points to the Z positive axis, no beam deflection exists, and therefore the pattern reconfigurable function in the left direction, the middle direction and the right direction can be achieved. When a switch on the orthogonal bidirectional feed network is closed, the size of the long line can realize 90-degree phase delay, and two orthogonal degenerate modes are synthesized into a circularly polarized wave to cover a complete half-power beam width.

The invention discloses a broadband circularly polarized scattering reconfigurable array antenna based on variable capacitance diode loading, and the broadband circularly polarized scattering reconfigurable array antenna is composed of a plurality of scattering reconfigurable antenna units. The scattering reconfigurable antenna unit comprises a resonance structure used for radiating or receiving signals and a feed and phase shift structure arranged on the lower surface of the resonance structure. The feed and phase shift structure comprises a broadband directional coupler and a reflection type broadband phase shifter. When the scattering reconfigurable antenna unit is in a radiation working state, the broadband directional coupler radiates energy to the resonant structure; when the scattering reconfigurable antenna unit is in a scattering working state, the broadband directional coupler transmits energy to the reflection type broadband phase shifter, and the reflection type broadband phase shifter regulates energy of secondary radiation of the reflection type broadband phase shifter according to bias voltage applied to an internal variable capacitance diode. The array antenna provided by the invention is wide in working frequency band, and the radiation performance can be ensured while the scattering characteristic is reconfigurable.

The invention discloses a pre-phase-based one-bit beam reconfigurable metasurface antenna device, which comprises a pre-phase-based one-bit metasurface antenna unit which is designed by adopting a resonance scattering analysis method, two microstrip line paths with different lengths are switched through a single-pole double-throw switch, so that a 180-degree phase difference of a signal is obtained to realize 1-bit phase regulation and control, and the one-bit beam reconfigurable metasurface antenna device is obtained. Electromagnetic simulation software is utilized to optimize geometric parameters and output reflection electromagnetic response of the design model; the overall design of the reconfigurable antenna array panel is carried out based on the designed unit model, and the reconfigurable antenna array panel comprises a sub-panel composed of a plurality of low-cost microstrip antenna array units and a control panel connected with external feed equipment and a main panel.

The invention provides a solar energy-radio frequency energy dual-driven low-altitude polarization switching dynamic power management system, and relates to the technical field of low-altitude flight. The system integrates a high-efficiency solar energy collection unit and a radio frequency energy collection unit with dynamic polarization adaptive switching capability, is assisted by a high-performance hybrid energy storage unit, and carries out unified coordination control through an intelligent power management unit. The radio frequency energy collection unit adopts a reconfigurable antenna technology, can sense the polarization characteristic of an environment radio frequency signal in real time, and dynamically switches the polarization state of an antenna to maximize the instantaneous energy capture efficiency; the intelligent power management unit executes a dynamic and collaborative energy flow scheduling strategy based on comprehensive analysis of solar irradiance, environment radio frequency spectrum and polarization characteristics, energy storage unit state, future energy income and expenditure prediction and real-time load demand; and the energy self-sustaining capability, the task endurance time and the working stability of low-altitude equipment in a complex and changeable environment are improved.

The invention discloses an arbitrary elliptical polarization programmable array antenna construction method. A single multi-polarization reconfigurable antenna can only realize a plurality of discrete polarization states and cannot realize receiving or transmitting of any elliptical polarization electromagnetic wave. According to the method, expected elliptical polarization is decomposed into superposition of vectors in the long axis direction and the short axis direction of an ellipse, four alternative polarization states are selected according to projection values of a multi-linear polarization reconfigurable unit in the two directions, then the number of the four alternative polarization states is calculated, and the polarization states of array units are randomly distributed according to the calculated number. And finally, receiving or transmitting any elliptical polarization electromagnetic wave according to the wave beam direction and the expected elliptical polarization configuration unit excitation phase. Polarization resources of electromagnetic waves can be fully utilized, and the method plays a significant role in expanding the capacity of a wireless electromagnetic system, improving the receiving and transmitting efficiency of the system, resisting external interference and the like.

Disclosed in the present invention is a microfluidic antenna with a reconfigurable frequency and directivity pattern. The microfluidic reconfigurable antenna consists of six parts, which are a metal floor, a metal radiation patch, a top reflector, a middle dielectric substrate, a coaxial feeder line penetrating the dielectric substrate, and an annular microfluidic channel packaged with a magnetic liquid metal column, respectively. Different modes can be excited by means of manipulating the length of the magnetic liquid metal column in the microfluidic channel, thus realizing the switching between radiation frequency bands; an antenna directivity pattern is reconfigured by means of manipulating the position of the magnetic liquid metal column; the microfluidic antenna involves main beam switching in a total of ten azimuthal planes within three bands of 5.98-6.10 GHz, 6.08-6.23 GHz and 6.85-7.47 GHz, and the maximum gain values in the states of the three bands are 8.5 dB, 7.4 dB and 8.1 dB, respectively; and the front-to-back ratios are 13 dB, 17 dB and 16 dB, respectively. The present invention has the characteristics of a simple structure, easy integration, a good performance, no introduction of extra distortion, low noise, a high-power operation capability and flexible application.

The invention provides a beam forming optimization method for an ISAC system based on a reconfigurable antenna structure, and the method comprises the steps: firstly, designing an energy-saving DFBS based on a TTD reconfigurable antenna architecture based on a downlink terahertz large-scale MIMO ISAC system; the DFBS is switched between the modular MIMO and the uniform MIMO by dynamically controlling the antenna sub-arrays; in the sensing stage, modular MIMO is deployed, and a larger array aperture is realized by using fewer antennas; the beam dispersion effect at the main lobe and the grating lobe is utilized to realize rapid user perception; in the communication stage, uniform MIMO is adopted, and a TTD network is activated to reduce the near-field beam dispersion effect; then, based on the channel state information obtained in the sensing stage, proposing a joint optimization problem of analog / digital hybrid beam forming and TTD network delay so as to maximize a system sum rate; finally, analog beam forming and time delay are designed through a serial time delayer method, and then alternating iteration optimization solution is carried out on digital beam forming.

Embodiments of the disclosure relate to a display device and display panel including a reconfigurable antenna. The display device may include: a substrate including a display area configured to display an image and a non-display area not configured to display an image; a pixel unit including a plurality of pixels disposed in the display area; and an antenna unit disposed in at least a portion of the display area or at least a portion of the non-display area. The antenna unit may include a plurality of radiators and an antenna constituent circuit configuring an antenna with at least one of the plurality of radiators.

The invention discloses an ultra-large octave antenna based on an organic photoconductive material, and belongs to the field of metamaterials and antennas. Comprising an organic photoconductor film electromagnetic surface and a digital light processing module capable of projecting different patterns on the surface of the organic photoconductor film electromagnetic surface, the organic photoconductor film electromagnetic surface can change conductivity distribution through light control, and the digital light processing module can dynamically adjust the size and shape of the patterns projected on the organic photoconductor film electromagnetic surface. Therefore, a reconfigurable antenna array is generated, and cross-multi-octave ultra-wideband electromagnetic wave signal receiving and transmitting are realized. The electromagnetic surface of the organic photoconductor film sequentially comprises a photoconductive material layer, a first light-transmitting glass layer, an indium tin oxide microstrip line feed layer, a second light-transmitting glass layer and a substrate indium tin oxide layer according to a lamination sequence. According to the invention, the problems of narrow bandwidth, slow response and high cost of a traditional reconfigurable antenna are solved.

The invention relates to the technical field of microwave array antennas, and particularly discloses a common-aperture antenna compatible with a Beidou Tiantong double-satellite system, which comprises a metal bottom plate and a microstrip antenna unit embedded in the metal bottom plate, the microstrip antenna unit comprises a Beidou short message receiving and transmitting frequency reconfigurable antenna unit, a Beidou B3 / B1 laminated antenna unit, a Beidou B3 / B2b laminated antenna unit, a Beidou B3 antenna unit, a Beidou B1 antenna unit and a Tiantong receiving and transmitting laminated antenna unit; the Tiantong transmit-receive laminated antenna units are arranged on the same circle with the center of the Beidou short message transmit-receive frequency reconfigurable antenna unit as the circle center. The Beidou B3 / B1 laminated antenna unit, the Beidou B3 / B2b laminated antenna unit, the Beidou B3 antenna unit and the Beidou B1 antenna unit are located between the Tiantong transmit-receive laminated antenna unit and the Beidou short message transmit-receive frequency reconfigurable antenna unit. According to the invention, common-caliber integration of the Beidou short message receiving and transmitting frequency reconfigurable antenna, the Beidou navigation anti-interference antenna, the Beidou direction-finding antenna and the Tiantong receiving and transmitting phased-array antenna can be realized.

The invention provides a millimeter wave directional diagram reconfigurable antenna and a reconfigurable method, and belongs to the technical field of wireless communication. A plurality of radiation structures are integrated on the same transmission line structure, and impedance regulation is performed by loading a control element on the antenna structure, so that one radiation structure is in a matched state, and the other radiation structures are in a mismatched state; time-domain reconfigurable collaborative excitation of a single feed structure on a plurality of radiation modes is realized; energy enters from the feed port and is radiated outwards through the radiation structure in the matched state. According to the invention, time-domain reconfigurable collaborative excitation of a single feed structure on a plurality of radiation modes can be realized; a plurality of modes can be freely and flexibly switched; a simple and compact direct-current circuit is provided; the stable radiation characteristic can be realized; the structure is compact, the integration level is high, the occupied space is small, and machining is easy; the antenna has relatively high gain and efficiency and relatively good working bandwidth; and the space coverage rate is relatively high.

A programmable and reconfigurable antenna that is equivalent in functionality to a coil antenna and thus capable of performing various measurements based on induction or propagation principles within a wellbore environment.

The invention relates to a dual-polarization 2bit transmission type metasurface unit working in a Ka wave band, which can realize four-state phase regulation and control of horizontal polarization and vertical polarization on a specified frequency band. And an implementation scheme with a better system integration advantage is provided for the high-frequency multi-polarization reconfigurable antenna system. The unit is composed of two groups of linearly polarized 2bit reconfigurable units which are orthogonally arranged, and each unit is composed of a pair of active receiving antennas at the bottom and a pair of active transmitting antennas at the top; a pair of PIN diodes are respectively integrated in a receiving antenna and a transmitting antenna, and four discrete phase states are realized through combination of switch states, so that 2-bit phase regulation and control are completed. The invention has the following advantages: 1, low transmission amplitude loss and precise phase gradient characteristic are shown in the dual-polarization Ka wave band, and high-precision wave beam regulation and control can be realized; 2, due to the fact that dual-line polarization adopts a synchronous regulation and control mode, the unit can complete phase control only through two feeder lines, and compared with an independent polarization control scheme, the complexity of a feed and bias network is remarkably reduced, so that interference of a bias circuit on electromagnetic radiation characteristics is effectively reduced; and 3, the emergent wave beam of the transmission type metasurface is located on the same side with the transmission type metasurface, so that the shielding of the feed source can be reduced, the interference of a reflection path is avoided, the aperture efficiency is improved, and the sidelobe is reduced.

The invention relates to the technical field of communication, and discloses an antenna and communication equipment. The antenna comprises a feed network, a plurality of phase shift units and a plurality of reconfigurable antenna sub-arrays, wherein the feed network comprises an input end and a plurality of output ends; each phase shifting unit is connected between one output end of the feed network and one reconfigurable antenna sub-array, and the phase shifting units are used for adjusting the phase of a radio frequency signal output by the feed network and then outputting the radio frequency signal to the reconfigurable antenna sub-arrays; the phase shifting unit comprises a first transmission line, a second transmission line and a liquid crystal layer, the liquid crystal layer is arranged between the first transmission line and the second transmission line, the physical length of the first transmission line and the physical length of the second transmission line are L, the guided wave length of the first transmission line and the guided wave length of the second transmission line are lambda g, and L and lambda g meet the condition that L is smaller than or equal to 1 / 4 lambda g; the reconfigurable antenna subarray comprises a plurality of 1-bit antenna units. According to the antenna, the signal transmission loss and the manufacturing cost can be reduced on the premise of improving the performance.

The present invention relates to an article entry and exit detection system and method based on a polarization reconfigurable antenna, and belongs to the field of radio frequency identification technology. It includes: a detection device, the detection device includes a detection channel, and the detection channel is used for the entry and exit of articles carrying radio frequency identification tags; a first polarization reconfigurable antenna is installed on an inner wall of one side of the detection channel; a radio frequency identification reader, connected to the first polarization reconfigurable antenna, is used to obtain the left and right rotation channel signal strength indication value of the first polarization reconfigurable antenna; a host computer, connected to the radio frequency identification reader, is used to calculate the difference between the left and right rotation channel signal strength indication values; obtain the entry and exit direction of the article carrying the radio frequency identification tag according to the internal difference. The present invention reduces the probability of missing the tag, can flexibly adjust the antenna height, does not require additional space resources, and simplifies the identification process.

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 invention relates to the technical field of antennas, in particular to a bandwidth-enhanced circularly-polarized reconfigurable microstrip antenna. Comprising a dielectric substrate and a metal floor attached to the lower surface of the dielectric substrate, and an annular patch, a driving branch knot, two parasitic branch knots and a direct current bias line are attached to the upper surface of the dielectric substrate. An inner conductor and an outer conductor of the coaxial cable are connected with the driving branch knot and the metal floor respectively, the driving branch knot excites a TM11 mode of the circular ring through an electric coupling path and excites a resonant mode of the parasitic branch knot through another magnetic coupling path, and the resonant parasitic branch knot excites another TM11 mode of the circular ring through electric coupling. And the circular polarization bandwidth with two axial ratio zero points is enhanced. The bias network controls the on-off of the diode on the parasitic branch knot through the DC voltage loaded by the coaxial cable so as to realize circular polarization reconfiguration. The antenna has the advantages of being compact in structure, enhanced in bandwidth, reconfigurable in circular polarization and low in profile, and compared with a circular polarization reconfigurable antenna of the same size, the bandwidth is expanded by more than one time, and the application range is wide.

The application discloses a high-gain millimeter wave polarization reconfigurable antenna and belongs to the technical field of wireless communication.The application provides a high-gain millimeter wave polarization reconfigurable antenna, and the whole antenna structure is completed on two layers of dielectric substrates.Polarization diversity is realized by connecting the center patch of two groups of parasitic short columns by using pin diode switches, and the polarization state can be switched in the directions of ±45 degrees.Then, in order to improve the radiation performance of the antenna, an extended semi-ellipsoid lens is added to the antenna, so that the antenna gain is increased by about 10 dB, and therefore, the integrated lens antenna is an effective method for developing the millimeter wave polarization reconfigurable antenna.The gain-enhanced polarization reconfigurable antenna has the advantages of high gain, low cost and stable radiation pattern and is an ideal choice for low-cost millimeter wave applications of the fifth generation (5G) communication technology.

The invention discloses a center feed four-azimuth wave beam reconfigurable antenna, and belongs to the field of radio frequency front-end devices. The antenna is composed of a straight arm, a crank arm, a central square patch, a capacitor loading ring, a shunt feeder line and a composite beam RF MEMS switch loaded at a fracture on the shunt feeder line, the structures are in central symmetry about a feeding point and respectively cover a 90-degree space range, and the feeding structure is connected with the center of a top patch through a microstrip feeder switching metal column. When the MEMS switch on a certain branch feeder line is switched on, current fed in from the center firstly flows to the straight crank arm radiation unit at the near end of the closed switch through the branch and then flows to the radiation unit at the far end, phase lag of the current at the far end is equivalent to superposition of a binary array, deflected wave beams are generated, the deflection angle can reach 50 degrees, the gain is 4.9 dB, and the wave beam width can reach 120 degrees. The structural design in central symmetry can realize the reconfigurability of wave beams in four directions in a space quadrant.

A pixel-based reconfigurable antenna (PRA) and the method for designing a PRA are disclosed. The PRA supports a total of N fluid antenna system (FAS) ports uniformly distributed across a linear length of Wλ. A physical model is established to connect the correlation of the antenna's reconfigurable radiation patterns with the spatial correlation of physical displacement. A two-step search optimization algorithm is proposed to find the optimized configurations of a pixel layer of the PRA.

The invention provides a near-field feed low-complexity reconfigurable antenna system, which belongs to the technical field of millimeter wave communication antennas and comprises a 1-bit phased array, a waveguide feed horn array and an air gap between the 1-bit phased array and the waveguide feed horn array. The 1-bit unit is composed of two magnetoelectric dipoles, and two diodes are integrated in the receiving unit to achieve 1-bit phase control. According to the 1-bit reconfigurable magnetoelectric dipole phased array disclosed by the invention, one horn mouth surface is used as a near-field feed source of the 2 * 2 magnetoelectric dipole sub-array, so that not only is the uniformity of aperture irradiation ensured through near-field coupling, but also the number of required phase shifters is reduced, and the excitation of the 1-bit reconfigurable magnetoelectric dipole phased array is conveniently realized. The waveguide phase shifter is directly integrated in the horn array antenna, by means of the working phase range wide enough, the phase shifter can effectively achieve phase distribution needed by array near-field feed, and mirror lobes in scanning beams are successfully suppressed. The reconfigurable array antenna is high in aperture efficiency, low in profile and simple in structure, and has the broadband scanning capability.

The present application belongs to the field of unmanned aerial vehicle electromagnetic countermeasures, high-power microwave protection and electromagnetic compatibility reinforcement, and particularly relates to a high-power microwave protection method for unmanned aerial vehicle body, which realizes lightweight global shielding by arranging three layers of gradient frequency selective composite skin on the unmanned aerial vehicle body; micro plasma units are arranged on the body gap, and the whole machine cable is replaced by optical fiber to double block the back door microwave coupling; a reconfigurable antenna, two-stage series limiting and a neural network adaptive filtering three-level radio frequency decoupling link are built on the nose; four groups of broadband sensors are arranged on the body to realize microsecond-level electromagnetic threat perception grading; a flight control closed-loop self-healing regulation system containing a bionic optimization algorithm is constructed, which can dynamically adjust the protection power consumption and automatically redundantly reconstruct the fault. The present application can realize a shielding efficiency of the whole machine of greater than or equal to 40 dB under a 1~18GHz, 20kV / m high field intensity environment, and can balance lightweight, communication signal fidelity and long endurance, effectively avoiding problems such as gap resonance, device breakdown and communication interruption, and is suitable for fixed-wing, vertical take-off and landing low-altitude unmanned aerial vehicles.

This invention relates to a pattern-reconfigurable antenna based on artificial surface plasmon polaritons (SSPPs), belonging to the field of antenna technology. The antenna includes a coplanar waveguide feed line, a transition structure, a reconfigurable SSPP waveguide, and periodic radiating elements. The reconfigurable SSPP waveguide modifies the dispersion characteristics by adding a varactor diode to a traditional SSPP element and adjusting the capacitance value using a bias circuit. The periodic radiating elements are elliptical patches with rectangular slots, coupled to the reconfigurable SSPP waveguide to radiate electromagnetic waves. This invention solves the problems of single radiation direction in traditional antennas and low gain in existing reconfigurable antennas. It achieves fixed-frequency beam scanning (maximum 23°) and frequency beam scanning (maximum 90°) in the 11.5GHz-15GHz frequency band, with gains greater than 9dBi (maximum 11.1dBi), expanding the detection range and increasing the detection distance, making it suitable for fields such as UAV detection.

Embodiments of the present application provide a beam width reconfigurable antenna and a base station, the antenna comprising: a main radiation unit configured to generate a first electromagnetic wave based on a feed network; a plurality of groups of electrically-controlled parasitic units arranged around the main radiation unit and configured to generate a second electromagnetic wave, so that the first electromagnetic wave and the second electromagnetic wave are fused to generate a third electromagnetic wave, and the third electromagnetic wave has adjustable beam width in a horizontal plane and a vertical plane. Through the present application, at least the problem that it is difficult to meet the needs of different communication environments in the related art is solved.

The invention relates to the technical field of antennas, and provides a computing antenna based on space-time digital control signal regulation and control and a control method, and the computing antenna based on space-time digital control signal regulation and control comprises a computing antenna array which comprises at least two reconfigurable antenna units; the radio frequency switch chip comprises a digital signal input port and at least two groups of radio frequency output ports, and the radio frequency output ports are used for being connected with the reconfigurable antenna unit; wherein the radio frequency switch chip controls the radio frequency characteristic that electromagnetic waves are incident to the radio frequency output port and then reflected back by reading a space-time digital control signal input by the digital signal input port, so that the radiation state of the reconfigurable antenna unit connected with the radio frequency output port is regulated and controlled; the space-time digital control signal is calculated and determined according to beam forming information of the antenna array. According to the computing antenna, the adjustment of the antenna performance along with the time change is realized by introducing the space-time digital control signal, and the complexity and the power consumption of the large-scale reconfigurable antenna design are reduced.

The invention discloses a channel acquisition method and system for a reconfigurable MIMO communication system, and belongs to the technical field of wireless communication, and the method comprises the steps: selecting any one directional diagram from all reconfigurable directional diagrams of a transmitting end, enabling all antennas of the transmitting end to use the selected directional diagram, and estimating a channel corresponding to the selected directional diagram; all reconfigurable antennas of a transmitting end are grouped according to the number of reconfigurable directional diagrams, so that different grouped antennas use different directional diagrams, antennas in the same group use the same directional diagram, and channels corresponding to each group of directional diagrams are estimated; and obtaining an estimated channel path and corresponding angle information based on the estimated channel, and extrapolating channel state information corresponding to all directional diagrams. According to the invention, after the partial channel state information of the directional diagrams is estimated through a small amount of pilot signals, the channel state information corresponding to all the directional diagrams is extrapolated by using the estimated partial channel state information, so that the pilot overhead is effectively reduced.

Reconfigurable Antenna This description relates to an antenna (200) comprising: – an amplifier array (201) comprising a plurality of first elementary cells (203); – a transmitter array (105) comprising a plurality of second elementary cells (107); and – at least one source (101), wherein said at least one source (101) is configured to radiate, or to be irradiated, by the transmitter array (105), and the amplifier array (201) is configured to radiate and to be irradiated by the transmitter array (105). Figure for the abbreviation: Fig. 2