148 results about "Reconfigurable antenna" patented technology

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.

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 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 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 present invention is a reconfigurable antenna, which includes a total reflection part, a partial reflection part, a partial transmission part, and a radiation part stacked in sequence. A resonant cavity is formed between the partial reflection part and the total reflection part. The radiation part is arranged in the resonant cavity. So that the electromagnetic wave radiated by the radiation part is reflected in the resonant cavity. The electromagnetic wave forms constructive interference during the reflection of the resonant cavity. The resonant cavity makes the electromagnetic wave form the same phase electromagnetic wave and radiation penetrating the reflection part. The partial transmission part is regulated to form beam reconstruction conditions, and the same-phase electromagnetic waves are formed into beams and radiated into space by the beam control conditions.

The invention discloses a frequency reconfigurable conformal array antenna and a preparation method thereof, an antenna metal radiation layer comprises a power distribution network and a reconfigurable antenna unit, a main radiation patch of the reconfigurable antenna unit is a rectangular metal patch, feed is carried out in a side feed mode, and the main radiation patch is a rectangular metal patch. The variable capacitance diode is arranged in the middle of the U-shaped groove between the main radiation patch and the parasitic patch; the 4 * 4 equidistantly arranged reconfigurable antenna units are connected with the T-junction power divider, and the input port of the power divider is connected with an external direct current bias device. By controlling the external bias voltage, the junction capacitance of the variable capacitance diode can be changed, and the reconstruction of the current on the surface of the patch is realized, so that the reconfigurable frequency is realized. The invention also discloses a processing method of the antenna. The antenna disclosed by the invention has the characteristics of low profile, simple structure, low cost, continuously reconfigurable frequency and the like, and the conformal preparation of the antenna can be realized according to the preparation scheme, so that the antenna has a conformal characteristic, and the influence of the antenna on the aerodynamic configuration of a carrier is reduced.

Disclosed herein are antenna systems, methods, and devices. The device includes a first portion including a first antenna array; and a second portion including a second antenna array, wherein the first portion and the second portion are movable with respect to one another, and wherein the first antenna array and the second antenna array are arranged such that in a first relative position of the first portion and the second portion with respect to one another the first antenna array and the second antenna array operate in combination with one another, and in a second relative position of the first portion and the second portion with respect to one another the first antenna array and the second antenna array operate independently of one another.

The invention discloses a terahertz directional diagram reconfigurable antenna based on an RF-MEMS switch, and belongs to the technical field of terahertz radio frequency front-end devices. The antenna is composed of a radiation unit, a composite beam ohmic contact type MEMS switch, a coplanar waveguide feed structure, a microstrip transmission line, a dielectric substrate and a metal ground backboard. The antenna adopts a single-layer quartz glass substrate integrated waveguide (SIW) feed structure, excellent impedance matching with a microstrip transmission line is realized, the relative bandwidth exceeds 19%, and an MEMS switch is driven to act through direct current bias. The antenna has a relatively wide impedance bandwidth. Reconfiguration of a directional diagram is controlled through on-off of a switch, the antenna achieves-40-degree, 0-degree and + 40-degree three-beam directional switching in the 00 mode, the 01 mode and the 10 mode, the main lobe widths in the three modes are 55.61 degrees, 58.94 degrees and 98.56 degrees respectively, and wide-angle-domain coverage is supported.

The application discloses a low-profile slot type frequency reconfigurable antenna, comprising: a full-metal reflection baffle, an upper layer dielectric substrate and a lower layer dielectric substrate arranged in sequence; the full-metal reflection baffle is located on one side of the upper surface of the upper layer dielectric substrate; the upper surface of the upper layer dielectric substrate is provided with a first metal patch and a second metal patch; the upper surface of the lower layer dielectric substrate is printed with a feeding structure, and the lower surface is printed with two metal ground plates; the two metal ground plates are respectively provided with grooves, two groups of PIN diodes connected with the two grooves are arranged in the grooves, the conduction directions of the two groups of PIN diodes are opposite, and the two metal ground plates are electrically connected with an external single-chip microcomputer through a direct-current feeding line structure. In the application, the PIN diode is used as an electric control element, the response speed is improved, one group of voltages can be used to control the working state of the antenna through the two groups of PIN diodes placed in opposite directions, the complexity of the structure is reduced, the complexity of the control system is reduced, and the cost of the antenna is reduced.

The invention relates to the technical field of wireless communication, and particularly discloses a dual-band directional diagram reconfigurable antenna based on multimode regulation and control and a control method.The antenna comprises a substrate, a radiation unit, a feed unit and a reconfigurable control module, the radiation unit is etched in the center of the surface of the substrate, a first rectangular groove is formed in the center of the radiation unit, and a second rectangular groove is formed in the center of the feed unit; the upper and lower sides of the first rectangular groove are symmetrically provided with second rectangular grooves on the radiation unit, and the tail ends of the second rectangular grooves are provided with circular grooves. The reconfigurable control module comprises a plurality of PIN diodes, a short-circuit pin assembly and a bias circuit, the bias circuit is used for controlling the on and off states of the PIN diodes, one end of each PIN diode is connected with the short-circuit pin assembly, and the other end of each PIN diode is connected with the radiation unit. According to the dual-band directional diagram reconfigurable antenna based on multi-mode regulation and control and the control method, dual-band four-mode work is achieved through a single feed structure, the multi-scene requirements of a wireless body area network are met, the performance is reliable, and integration is easy.

The present application relates to the technical field of communications. Disclosed are an antenna and a communication device. The antenna comprises a feed network, a plurality of phase shift units and a plurality of reconfigurable antenna subarrays, wherein the feed network comprises an input end and a plurality of output ends; each phase shift unit is connected between one output end of the feed network and one reconfigurable antenna subarray; each phase shift unit is used for adjusting the phase of a radio frequency signal outputted by the feed network and then outputting same to one reconfigurable antenna subarray; each phase shift unit comprises a first transmission line, a second transmission line and a liquid crystal layer, the liquid crystal layer being 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 both being L, the guided wavelength for the first transmission line and the guided wavelength for the second transmission line both being λg, and L and λg satisfying L≤1 / 4λg; and each reconfigurable antenna subarray comprises a plurality of 1-bit antenna units. The antenna can reduce the signal transmission loss and the manufacturing cost while improving the performance.

The application relates to a polarization reconfigurable antenna based on a substrate integrated waveguide and an artificial surface plasmon, and belongs to the technical field of antennas. The application aims to solve the problems of fixed polarization characteristics of a traditional antenna, low gain of an existing polarization reconfigurable antenna, and limited beam scanning angle of a leaky-wave antenna. The antenna comprises two groups of 45-degree linear polarization antenna units (SSPP units constructed based on a SIW resonant cavity and a periodic 45-degree rectangular slot) arranged orthogonally and a power divider with a 90-degree phase difference. The power divider is selectively driven to work by controlling the switching state of PIN diodes. By controlling the state of the diodes, dynamic switching of +45-degree linear polarization, -45-degree linear polarization and right-handed circular polarization can be realized. Meanwhile, the antenna has high gain (up to 14.7dBi) and a beam scanning capability of about 43 degrees within a frequency range of 11.5-14.5GHz, and is suitable for wireless communication, radar systems and unmanned aerial vehicle detection.

The application discloses a dual-polarized pattern reconfigurable antenna with polarization independent adjustment, and solves the problem that each polarization of a reconfigurable antenna using a single reconfiguration device can only be one-dimensionally scanned through the particularity of a horizontal polarization layer and a vertical polarization layer. Each polarization can be two-dimensionally deflected in an E plane and an H plane, that is, can be deflected up, down, left and right. The reconfigurable antenna controls surface current, and the two polarized antennas are respectively located on the upper and lower surfaces of a dielectric substrate, and the surface current cannot pass through the dielectric, so the control of the two polarizations of the dual-polarized antenna does not affect each other. When the reconfigurable antenna is applied to a base station array antenna, the two polarizations can be simultaneously deflected in different directions, so that a multi-beam antenna can be realized, and different users in different directions can be simultaneously served. On the premise of not increasing the number of array antennas, the communication capacity of the base station antenna is greatly improved. As a pattern reconfigurable antenna, the problem of gain collapse when the array antenna is large-angle scanned can be compensated.

The invention discloses a multi-medium environment-oriented RFID (Radio Frequency Identification) tag adaptive separation system and packaging method, and belongs to the technical field of radio frequency identification. The system is composed of a multi-band reconfigurable antenna array, an embedded environment sensing module, a self-adaptive impedance tuning circuit and an intelligent control unit, the working frequency and the impedance matching state are dynamically adjusted by detecting dielectric constants and electromagnetic loss parameters in real time, and optimal energy transmission in the multi-medium environment is achieved. According to the packaging method, a multi-layer composite structure design is adopted, a flexible substrate and a gradient dielectric material are combined, an antenna radiation pattern is simulated and optimized through a three-dimensional electromagnetic field, and an electromagnetic shielding isolation layer is introduced to reduce environmental coupling interference. According to the scheme, the tag recognition rate and the communication distance in a complex medium scene are effectively improved, meanwhile, the tag has the characteristics of self-repairing of a protective coating and low power consumption, and the tag can be widely applied to the fields of industrial Internet of Things, intelligent logistics and special environment monitoring.

The present application provides a planar end-fire reconfigurable antenna and radio equipment, relating to the field of antenna technology. The planar end-fire reconfigurable antenna comprises: a substrate; four pairs of parallel double wires, each pair of parallel double wires being disposed on the upper and lower surfaces of the substrate; four pairs of coupling branches, each pair of coupling branches being disposed on the upper and lower surfaces of the substrate; four groups of PIN diodes, each group of PIN diodes being disposed on the upper and lower surfaces of the substrate, each group of PIN diodes corresponding to a pair of parallel double wires; four pairs of annular microstrip lines, each pair of annular microstrip lines being connected to the ends of corresponding parallel double wires, each pair of annular microstrip lines being disposed on the upper and lower surfaces of the substrate; four metal through-holes, each metal through-hole being connected to the ends of corresponding annular microstrip lines; a feed coaxial line, the feed coaxial line being disposed at the center point of the substrate; and four bias circuits for providing bias voltages to each group of PIN diodes.

The invention relates to a directional diagram reconfigurable antenna based on artificial surface plasmon polaritons, and belongs to the technical field of antennas. The antenna comprises a coplanar waveguide feeder line, a transition structure, a reconfigurable SSPP waveguide and a periodic radiation unit. According to the reconfigurable SSPP waveguide, a variable capacitance diode is added on a traditional SSPP unit, and a bias circuit is matched to regulate and control a capacitance value so as to change dispersion characteristics; the periodic radiation unit is an elliptical patch with a rectangular slot, and is coupled with the reconfigurable SSPP waveguide to radiate electromagnetic waves. According to the reconfigurable antenna, the problems that a traditional antenna is single in radiation direction and an existing reconfigurable antenna is low in gain are solved, fixed-frequency beam scanning (23 degrees to the maximum) and frequency beam scanning (90 degrees to the maximum) are achieved within the frequency band of 11.5-15 GHz, the gain is larger than 9 dBi (11.1 dBi to the maximum), the detection range can be expanded, the detection distance can be increased, and the reconfigurable antenna is suitable for the fields of unmanned aerial vehicle detection and the like.

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.