411 results about "Feed network" patented technology

The application discloses a Ka dual-circular polarization antenna unit and a flat plate array antenna, which comprises, from top to bottom, a radiation patch layer, a slot coupling layer, a waveguide transmission layer and a feed network layer; a plurality of microstrip line structures are arranged on the radiation patch layer, the microstrip line structure comprises a first microstrip line and a second microstrip line, and the first microstrip line and the second microstrip line form a 90-degree phase difference of electric field orthogonal components; the slot coupling layer comprises a second substrate, the second substrate is provided with a source collapse groove corresponding to the microstrip line structure, and the slot coupling layer and the radiation patch layer are relatively displaced under the action of an external force; the microstrip line structure corresponding to the source collapse groove is switched between a left-handed circular polarization microstrip line and a right-handed circular polarization microstrip line through the relative displacement; and the source collapse groove and the first substrate form a linear polarization feed source. According to the application, each dual-circular polarization feed source is used to form dual-circular polarization, and a polarization partition plate of a feed source waveguide is not relied on, so that the thickness of the antenna structure is reduced.

The invention discloses a self-adaptive multi-unit very-low-frequency phased-array antenna system and a control method thereof, and the system comprises an antenna unit which comprises a vertical radiator and a top loading capacitor network erected on the vertical radiator; the central signal processing and distributing unit comprises parallel signal channels with the same number as the antenna units, and the signal channels are integrated with signal adjusting devices; the input end of the feed network is connected to the central signal processing and distributing unit, and the output end is connected to the vertical radiator to transmit a radio frequency excitation signal; the plurality of feedback sensors are arranged in the feed network and are used for monitoring electrical state parameters of signals flowing to the antenna units; the central control unit is connected with the feedback sensor and the central signal processing and distributing unit, monitors electrical state parameters based on the feedback sensor, and controls the signal adjusting device to adjust the amplitude and phase of the excitation signal. According to the invention, the beam forming and directional communication capabilities of the very-low-frequency antenna are realized, and the flexibility of an antenna system is expanded.

The invention belongs to the technical field of satellite communication and antenna arrays, and relates to a low-orbit satellite ultra-large folded array antenna beam and polarization adaptive calibration system. According to the system, through a feed network of an antenna and a coupler of a satellite-borne detection path, a Jones matrix of each array element is obtained by adopting time division multiplexing excitation, and amplitude and phase calibration in a substrate is realized by utilizing least square pseudo-inverse compensation. Self-adaptive fusion is carried out according to the energy of the left-hand and right-hand circular polarization channels, the residual error of a fusion signal and an ideal signal is calculated, and abnormal array elements are removed in combination with amplitude outlier and phase jump detection. Performing low-rank denoising and sparse correction processing on the phase residual error, calculating the plane coefficient of each substrate through weighted least square plane fitting, and realizing smoothing and compensation iteration by using Kalman filtering and phase updating constraint. And finally, correcting each array element by the spaceborne digital beam forming unit according to the calibration coefficient, thereby realizing accurate calibration of the antenna beam and polarization.

The invention provides a low-profile circularly polarized antenna unit for slot coupling feed and an array thereof, and the antenna unit employs a plurality of metal layers which are coaxially arranged, are sequentially stacked up and down and are separated through dielectric layers, thereby achieving the high integration of a feed network, a coupling structure and a radiation unit in the vertical direction of the antenna unit. Specifically, the parasitic patch and the radiation patch which are stacked and coupled up and down are adopted, so that the working bandwidth of the antenna unit is expanded; furthermore, the interference of a feed network on the radiation performance of the antenna is reduced through the separation of the upper metal ground and the lower metal ground, and meanwhile, two orthogonally distributed gap structures formed in the upper metal ground are matched with the microstrip transmission line to perform coupling feed, so that the circular polarization performance of the antenna unit is improved; in addition, periodically arranged metallized shielding through holes are formed in the edges of the antenna units, so that surface wave propagation and electromagnetic coupling between the units are effectively inhibited, and the performance stability of the antenna unit during large-angle scanning is improved while the low-profile characteristic of the antenna unit is ensured.

The application provides a leaky-wave antenna array based on a multimode substrate integrated waveguide coupler, relates to the technical fields of wireless communication and radar, and comprises a dielectric substrate, a multimode substrate integrated waveguide coupler and two leaky-wave antenna units. The multimode substrate integrated waveguide coupler is integrated on the dielectric substrate and is configured to excite modes and modes of the substrate integrated waveguide respectively in the same frequency range, generate even-mode signals with equal amplitude and in-phase and odd-mode signals with equal amplitude and opposite phase. The two leaky-wave antenna units are symmetrically arranged on the two sides of the upper surface metal layer of the dielectric substrate and are connected with two output ports of the multimode substrate integrated waveguide coupler respectively. The two leaky-wave antenna units are configured to radiate a wave beam and a difference wave beam in response to the even-mode signals and the odd-mode signals. The application solves the problem of low measurement accuracy of a traditional single-pulse antenna, has the technical effects of simplifying the design of a feed network, improving radiation performance and thus improving measurement accuracy.

The utility model relates to a cavity structure for a phase shifter, and the cavity structure comprises a middle cavity which is constructed to be used for accommodating a main feed signal line; the side edge cavities are separately arranged on the two sides of the middle cavity, and the side edge cavities are constructed to be used for accommodating a power division network, a phase shift network and a main feed network; and the main feed network is electrically connected with the main feed signal line through the metal adapter piece, and the main feed network is electrically connected with the main feed signal line through the metal adapter piece. In this way, the cavity structure for the phase shifter can be divided into at least three smaller cavities which are arranged side by side, so that the height of the cavity structure for the phase shifter can be reduced, and the assembly flexibility and the overall height of the antenna comprising the cavity structure provided by the utility model are further improved.

The invention discloses a phased-array antenna control method and system based on impedance matching, a medium and a product, and relates to the technical field of antennas. In the method, before the phased-array antenna works, a target impedance matching parameter is calculated for active input impedance under each preset scanning angle point; establishing a target mapping relation table based on the plurality of preset scanning angle points and the corresponding target impedance matching parameters; during the working period of the phased-array antenna, receiving a target scanning angle, and calculating to obtain a corresponding beam pointing phase value for each antenna unit in the antenna array according to the target scanning angle; determining a real-time impedance matching parameter based on the target scanning angle and the target mapping relation table; and loading the beam pointing phase value to a phase shifter in the feed network, and applying a real-time impedance matching parameter to the dynamic impedance matching network, so that the input impedance of the antenna array is matched with the characteristic impedance of the feed network. By implementing the technical scheme provided by the invention, the radio frequency performance of the phased-array antenna is improved.

The invention belongs to the field of antennas, and particularly relates to a polarization selection electromagnetic protection circularly polarized antenna and a use method thereof. The polarization selection electromagnetic protection circularly polarized antenna comprises an antenna radiation unit which comprises a main radiation body and a plurality of current coupling perturbation structures arranged on the main radiation body; the polarization control and protection unit comprises at least two groups of protection structures and control elements corresponding to the protection structures; the two groups of protection structures are respectively arranged corresponding to two orthogonal polarization directions of the antenna and are selectively connected with the main radiator through the control element; the multi-feed network comprises a plurality of feeds which are connected according to a preset phase difference relation and is used for exciting the antenna radiation unit to generate circularly polarized radiation waves; according to the circularly polarized antenna provided by the invention, the connection state of a protection structure is switched through a passive control element under high-power microwave incidence, and the polarization characteristic of the antenna is dynamically reconstructed, so that polarization selective protection is realized and the communication capability is kept under strong electromagnetic attack.

The invention provides a filtering circularly polarized antenna with a wide axial ratio bandwidth. The filtering circularly polarized antenna comprises a first dielectric plate, a second dielectric plate, a third dielectric plate and a fourth dielectric plate which are sequentially arranged in parallel from bottom to top, a metal reflecting plate is printed on the lower surface of the first dielectric plate; a feed network is printed on the lower surface of the second dielectric plate, a slotted metal ground is printed on the upper surface of the second dielectric plate, a feed port is formed in one side edge of the second dielectric plate, and the feed port is electrically connected with the feed network and the slotted metal ground; a second square patch and an octagonal parasitic microstrip line frame are printed on the upper surface of the third dielectric plate, and the octagonal parasitic microstrip line frame surrounds the outer side of the second square patch; and a first square patch is printed on the lower surface of the fourth dielectric plate. Through an interlayer coupling collaborative design, 2.3-5.0 GHz broadband circular polarization radiation and high gain characteristics are realized, and the antenna also has high out-of-band rejection capability and can effectively filter out-of-band clutter interference.

The present disclosure provides an antenna device and a radio frequency system. Wherein, the antenna device comprises an antenna array and a feed network; wherein the feed network comprises a main path and a plurality of branch paths connected with the main path; the antenna array is divided into a plurality of antenna unit groups, each antenna unit group comprises a plurality of antenna units, the antenna unit comprises a radiation structure and a phase shift structure connected with the radiation structure; the phase shift structures of the plurality of antenna units located in the same antenna unit group are connected with the same branch path.

The invention discloses an antenna unit capable of being used for a low RCS array, and belongs to the technical field of antennas. The antenna comprises a radiation structure layer and a feed network layer. The radiation structure layer comprises rectangular metal patches and special-shaped metal patches which are arranged in an array. The rectangular metal patches form a 2 * 4 array in the same plane; the number of the special-shaped metal patches is two, and the two special-shaped metal patches are located below the 2 * 4 array. The feed network layer is located below the radiation structure layer, and a T-shaped branch knot is arranged between an upper metal plate and a lower metal plate of the feed network layer; a radio frequency socket is arranged at the bottom of the lower metal floor, and an outer conductor of the radio frequency socket is connected with the lower metal plate; an inner conductor of the radio frequency socket penetrates through the lower metal floor and is connected with a common end of the T-shaped branch knot, and two branch ends of the T-shaped branch knot are connected with the corresponding special-shaped metal sheets through the corresponding feed probes. According to the invention, a radiation function and a scattering control function are integrated, so that the radiation performance of the antenna is ensured, and the RCS of the unit and the scattering grating lobes during array splicing use are obviously reduced.

The circularly polarized metasurface antenna comprises a metasurface layer, a first dielectric plate layer, a metal floor layer, a second dielectric plate layer and a feed network layer which are sequentially stacked from top to bottom, the metasurface layer comprises a plurality of mutually orthogonal metasurface subunits, each metasurface subunit comprises a plurality of metasurface structures arranged in an array period, and each metasurface structure is provided with a monopole radiation structure; the feed network layer is provided with a plurality of output feed points, and the number of the output feed points is the same as that of the metasurface structures. The output feeding points are connected with probes, and the probes sequentially penetrate through the second dielectric plate layer, the metal floor layer and the first dielectric plate layer until the probes are connected with the input feeding points of the corresponding radiation structures. According to the antenna, each layer adopts a covering laminated design, the structure is compact, the antenna has the characteristics of ultra-wideband circular polarization radiation, high gain and good cross polarization, the dual ultra-wideband characteristics of working and RCS reduction are realized, the RCS reduction bandwidth completely covers the working bandwidth, and effective invisibility in and out of the antenna band is achieved.

This invention discloses a dual-frequency circularly polarized fusion antenna with a high frequency ratio and its design method. It includes a first and a second dielectric substrate, with the first substrate positioned above the second. The lower surface of the first substrate is a copper-clad ground plane, and its upper surface is provided with a first, second, third, and fourth metal radiator. A metal post is loaded at one end of each radiator near the center of the dielectric substrate and connected to the ground plane, while a millimeter-wave metal probe is loaded at the other end away from the center. The lower surface of the second dielectric substrate has a microwave feed network and four 180-degree phase difference power dividers. The output ports of the microwave feed network are connected to the four microwave metal probes, and the output ports of the 180-degree phase difference power dividers are connected to eight millimeter-wave metal probes. This invention features dual-frequency circular polarization, effectively reducing the impact of multipath effects and enabling the reuse of radiators, thereby reducing the space resource requirements of communication equipment.

This disclosure provides a phase shifter, a feed network, and a phased array system. The phase shifter includes multiple phase shifting units cascaded between an input and an output. Each phase shifting unit includes a cascaded first phase shifting unit and a second phase shifting unit. The first phase shifting unit includes a first inductor, and the second phase shifting unit includes a second inductor. Both the first and second inductors are disposed on a substrate. The orthographic projection of the first inductor onto the substrate includes interconnected first and second winding portions, which are arranged along a first direction with opposite current winding directions. The orthographic projection of the second inductor onto the substrate at least partially overlaps with the first winding portion in a second direction, and the second direction is perpendicular to the first direction. This disclosure can reduce the coupling between the first and second inductors, which is beneficial for reducing the layout area of ​​the phase shifter.

The invention provides an antenna and a method for generating an orbital angular momentum beam. The antenna adopts a holographic metasurface antenna integrating a monopole feed source and a metasurface unit network, and the monopole feed source is a coaxial feed monopole located in the center of a lower metal plate and is used for generating reference waves. Vortex beams propagating in the normal direction of an antenna serve as target waves, a hologram function is calculated in combination with reference waves, and then surface phase distribution is obtained. And modulating a gap state of the metasurface unit network by using the phase distribution to provide required phase compensation, so that the modulated unit interacts with a reference wave, and finally generating an orbital angular momentum wave beam in a specified mode. The monopole feed source and the metasurface are integrated through the holographic principle, a complex feed network and an external emission source are omitted, the antenna has the advantages of being simple in structure, low in profile, easy to miniaturize and integrate and the like, and the problems that in the prior art, occupied space is large, and design is complex are effectively solved.

The invention discloses an electromagnetic vortex wave radar system feed network delay measurement and correction method. The method comprises the following steps: establishing a multi-channel electromagnetic vortex wave radar system feed network length and signal delay model; establishing an inter-channel signal delay measurement system of the electromagnetic vortex wave radar system; the method comprises the following steps: performing matched filtering on multi-channel echo signals in an inter-channel signal delay measurement system of an electromagnetic vortex wave radar system to obtain a one-dimensional distance image, obtaining an inter-channel signal delay integer part compensation sequence according to the one-dimensional distance image, and performing up-sampling on the one-dimensional distance image to obtain an inter-channel signal delay fractional part compensation sequence; and correcting the inter-channel signal time delay integer part compensation sequence through a signal time delay integer part correction method, and correcting the inter-channel signal time delay fractional part compensation sequence through a fractional part signal time delay correction method of Lagrange interpolation. According to the invention, measurement and compensation of signal delay inconsistency between channels of the multi-channel electromagnetic vortex wave radar system are realized.

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 discloses a multi-band feed source network time-sharing fixing and switching device, and belongs to the field of communication and interception antennas. The device comprises an auxiliary surface assembly, an antenna main surface and a feed source assembly, and a rotary feed changing sleeve is innovatively introduced. The feed source assembly is composed of three feed source networks, two of the feed source networks are installed on the rotary feed changing sleeve, and the third feed source network is supported and fixed to the fixed cylinder through the side feed source network. And the feed switching motor is rotated to drive the sleeve to rotate, so that time-sharing alignment of the first two feed source networks and the common secondary surface is realized. The auxiliary face assembly comprises a turnover double-auxiliary-face structure and is driven by a turnover motor set to be switched, so that different auxiliary faces respectively correspond to the feed source network on the rotary feed changing sleeve or the feed source network fixed on the side face. According to the invention, through combination of rotation and turnover motion, efficient and compact time-sharing sharing of a multi-band feed source network is realized, the structure is simplified, the weight and power consumption are reduced, and the switching speed and the system reliability are improved.

This invention discloses a microwave heating system for a precision temperature-controlled reactor, comprising: a microwave power radiator including at least two antenna units arranged around the reactor for radiating microwave energy into the reactor; a multiplexed feed network having multiple independent branches, each branch connected to one of the antenna units, and configured to selectively direct energy to the corresponding branch and antenna unit according to the frequency of the input microwave; a controllable power source connected to the input of the multiplexed feed network for generating microwave energy with adjustable frequency and power; a stirrer disposed inside the reactor for stirring materials; and a temperature sensor for monitoring the temperature of the materials inside the reactor. The controllable power source is configured to: select and activate different antenna units by adjusting the frequency of the output microwave based on the feedback signal from the temperature sensor and a preset temperature curve, and control the heating intensity by adjusting the power of the output microwave, thereby achieving zoned closed-loop heating of the materials inside the reactor.

The utility model provides a four-array microstrip antenna applied to a high-frequency wireless charging technology, which comprises patch antennas arranged in a 2 * 2 array and a feed network connecting the four patch antennas, and the feed network comprises two identical T-shaped power dividers. Four output ports of the two T-shaped power dividers are respectively connected with a patch antenna through a first microstrip line, and input ports of the two T-shaped power dividers are connected through a second microstrip line. The four-array microstrip antenna provided by the utility model has a good transmission characteristic, and the radiation gain of the antenna array is improved.

The invention relates to the technical field of multi-band antennas, and discloses a multi-band antenna signal interference suppression method and system, and the method comprises the steps: mapping multi-source heterogeneous data collected by a multi-band antenna into a multi-mode feed network; carrying out multi-stream signal convergence on the space electromagnetic signal of the multi-source heterogeneous data to obtain a mixed signal; coupling the mixed signal to a multi-mode feed network, and performing space-frequency joint domain decoupling on the mixed signal to obtain a separated signal flow; performing signal feature deconstruction on the separated signal flow to obtain a relative interference feature; matching the relative interference features with a preset interference feature library one by one, and performing strategic reconstruction according to a matching result to obtain a suppression strategy; in the multi-mode feed network, based on a suppression strategy, vector synthesis is carried out on frequency band signals in the multi-source heterogeneous data, and target synthesis signals are obtained; according to the invention, the signal interference suppression efficiency of the multi-band antenna can be improved.

The application provides a frequency diversity and polarization diversity transmission system based on diversity antennas, comprising a diversity antenna subsystem, a radio frequency feeding network and a baseband processing unit, the diversity antenna subsystem comprises a first diversity antenna, a second diversity antenna and a metal floor, the first diversity antenna and the second diversity antenna are both at least dual-frequency antennas and are placed in space orthogonally, the radio frequency feeding network comprises a signal phase shifter, an equivalent phase shifter, a power divider and a signal amplifying device, and can realize frequency diversity and twice polarization diversity. The frequency diversity and polarization diversity transmission system based on diversity antennas provided by the application realizes the collaborative innovation of a radio frequency front end and a baseband processing unit, and constructs a complete radio frequency baseband architecture which can simultaneously and actively realize the collaborative processing of polarization diversity and frequency diversity.

The invention belongs to the technical field of low-altitude radar antenna gain, and discloses a low-altitude surveillance radar X-band antenna gain estimation method and system, and the method comprises the steps: collecting the phase distribution of a radiation unit, the standing-wave ratio of a feed network and other microscopic parameters, and building a correlation model of the microscopic parameters with a mesoscopic multipath signal and macroscopic scene complexity; a transition area correction factor iterator is introduced, temperature compensation, frequency compensation and a multi-level loss correction process are combined, and errors of temperature drift and frequency deviation of the 10-12 GHz frequency band are counteracted; the accuracy of gain estimation in a complex low-altitude environment is improved; constructing a three-dimensional adaptive matrix of the RCS, the maneuvering acceleration and the target type, and forming a three-dimensional correction system in combination with the environment complexity dimension; in a multi-target scene, computing resources are distributed according to the logic that the smaller the RCS is, the larger the maneuvering acceleration is and the higher the priority is, the targets are processed in batches by adopting a time division multiplexing architecture, and the contradiction between the gain response lag of the X-band antenna and the fast maneuvering of the targets is relieved.

The utility model discloses a miniaturized double-frequency wide-beam terminal antenna, which relates to the technical field of mobile terminal antennas and comprises an antenna cap, an antenna housing, a radiator assembly, a feed network module, a radio frequency connector and an antenna base, and the radiator assembly, the feed network module and the radio frequency connector are sequentially distributed inside the antenna housing from top to bottom. According to the miniaturized double-frequency wide-beam terminal antenna, the radiation copper strip is arranged in a gradually-changed spiral form, and when the radiation copper strip is at the same rising angle, the spiral arm with the top open circuit structure has a wider beam width than the spiral arm with the short circuit structure, so that low-elevation electromagnetic signal radiation and reception of the satellite antenna are facilitated; the radiation copper strip is provided with four feeding points, each feeding point is connected with two oscillator arms with different lengths, the circular polarization characteristic and the double-frequency radiation characteristic of the antenna are guaranteed, the two oscillator arms with the same feeding guarantee different rising angles and widths, the isolation degree of double-frequency radiation is improved, the shape of a directional diagram is more regular, and higher radiation gain is achieved.

Provided in the embodiments of the present disclosure is a vehicle-mounted antenna, comprising: at least two antenna elements, which are vertically arranged on a high-frequency printed circuit board; a phase-shifting feed network, which is fixed on the high-frequency printed circuit board, and is connected to each antenna element; and a first metal frame, which is arranged around the at least two antenna elements on the periphery of the high-frequency printed circuit board, and comprises a plurality of grid bars spaced apart and vertically arranged, wherein the surface of each grid bar that faces the antenna elements is formed as a signal reflection surface; the first metal frame comprises a first frame surface and a second frame surface, and the area of signal reflection surfaces of the first frame surface is greater than the area of signal reflection surfaces of the second frame surface; and a first preset angle is formed between the first frame surface and at least one antenna element, and a second preset angle is formed between the second frame surface and a corresponding antenna element, the second preset angle being different from the first preset angle. By means of the antenna, the gain characteristics of an elevation cut of the antenna can be adjusted, thereby achieving the effect of improving the gain of a low elevation cut of the antenna.

This invention relates to the field of electromagnetic fields and microwave technology, aiming to solve the problems of traditional orthogonal short-circuit dual-wire baluns, which suffer from strong jumper inductance effects, large dual-wire radiation, and severe pattern distortion above 5GHz. The planar orthogonal differential feed network also suffers from high network losses and manufacturing costs, making it unsuitable for widespread use in electronic devices above 5GHz. The invention provides a dual-polarized back-cavity radiator, including a reflective cavity enclosure component forming an inner reflective cavity and a ring reflective cavity. An orthogonal printed composite oscillator is disposed within the inner reflective cavity, comprising horizontal and vertical printed composite oscillators, with oscillator plates connected to both sides of each oscillator. Each printed composite oscillator integrates a dual-wire balun, impedance compensation lines, and open-circuit compensation sections. Each printed composite oscillator includes a printed oscillator with front, back, and mezzanine circuits. The impedance compensation lines and open-circuit compensation sections are embedded within the printed oscillator and connected to the mezzanine circuits. The dual-wire balun includes parallel dual wires connected to the front and back circuits.

The invention provides a broadband horizontal polarization waveguide slot antenna array, which comprises a radiation slot layer, a slot coupling layer, a feed network layer and a standard waveguide interface, and is characterized in that the radiation slot layer is provided with 16 independent ridge waveguides, 16 V-shaped slots are cut on each ridge waveguide, each ridge waveguide is blocked by three cavity isolation walls to form four ridge waveguide sections, and each cavity isolation wall is provided with one V-shaped slot. Four V-shaped slots are distributed on each ridge waveguide section, 64 I-shaped coupling slots are formed in the slot coupling layer, the I-shaped coupling slots are located under the ridge waveguide sections, and the feed network layer adopts a flattened narrow-edge ridge waveguide design. Comprising a five-order one-to-two ridge waveguide power divider, a ridge waveguide-to-common waveguide converter, a multi-branch waveguide impedance transformer and an E-plane T-shaped joint. The antenna has the beneficial effects that the antenna is light in weight and low in profile; the antenna bandwidth is improved; the antenna structure is simple.

The application discloses an end-fire antenna, comprising an antenna board, at least two sub-antennas are arranged at the top end of the antenna board, a feed network layer is arranged at the bottom end of the antenna board, at least two feed columns are arranged in the antenna board, the feed columns correspond to the sub-antennas one by one, the feed columns penetrate through the antenna board and connect the sub-antennas and the feed network layer. The feed network layer transmits high-frequency current to the corresponding sub-antennas through the feed columns, matches the required amplitude and phase for the sub-antennas, and finally converts the high-frequency current into electromagnetic waves, forms strong directional end-radiation in space, and makes the end-fire antenna have good end-fire characteristics.

According to the TE20 mode LTCC patch antenna and radar based on the SIW structure, the SIW structure is applied to a reverse phase balance feed network and a slot coupling patch antenna, is applied to a high-gain TE20 mode LTCC patch antenna array with the frequency band of 77-81GHz and is packaged in an integrated antenna, and the TE20 mode LTCC patch antenna and radar based on the SIW structure have the performance of high gain and wide frequency band; the SIW structure and the LTCC multilayer structure are combined to realize a high-performance, miniaturized and highly integrated high-frequency microwave device, which is an important innovation in the technical field of radio frequency and microwave. The LTCC technology adopted by the invention can realize stacking of multiple layers of ceramic substrates, and provides a basis for manufacturing a multilayer SIW device; the SIW structure realizes a complex waveguide structure on the LTCC substrate, the performance and efficiency of the device are improved, and the formed array antenna has unique advantages in the development of millimeter wave packaging antennas.

The invention discloses a rail transit 5G Massive MIMO conformal antenna based on a holographic metasurface and a beam regulation and control method of the rail transit 5G Massive MIMO conformal antenna, and belongs to the technical field of wireless communication. The conformal antenna comprises a flexible dielectric substrate, a holographic metasurface unit array, an impedance matching layer, an active feed network and an intelligent control system. The beam regulation and control method comprises a hologram calculation step, a dynamic beam forming step and a multi-mode vortex beam generation step. Conformal deployment of the antenna, the tunnel inner wall, a train body and other complex curved surfaces is achieved through the holographic metasurface technology, the intelligent beam regulation and control algorithm is utilized to adapt to the rail transit fast time-varying channel environment, the problems that a traditional antenna is limited in form and too high in energy consumption are effectively solved, and meanwhile high-capacity, low-power-consumption and high-safety wireless communication is achieved.