41 results about "Radiation zone" patented technology

The utility model discloses a waveguide antenna and a radar, and the waveguide antenna comprises a radiation layer which is provided with a first surface, a solder resist part is formed at a preset position of the first surface, and a welding area is formed in the solder resist part; the signal transmission layer and the radiation layer are arranged in a stacked mode in the first direction, the signal transmission layer is provided with a second surface, and a gap space is formed between the second surface and the first surface; the soldering tin layer is arranged in the gap space and provided with a first end and a second end in the first direction, the first end of the soldering tin layer is connected to the welding area, and the second end of the soldering tin layer is connected to the second surface. According to the utility model, the solder resist part is arranged on the radiation layer and is used as a reference mark, and the alignment between the radiation layer and the signal transmission layer can be ensured to be more accurate by accurately controlling the position and the shape of the solder resist part, so that the high-precision positioning requirement of the radiation layer and the signal transmission layer of the waveguide antenna is met.

The invention discloses a wave-absorbing metasurface low-profile wide-angle RCS (radar cross section) reduction tight coupling dipole antenna. The array is composed of a radiation layer, a middle layer, a wave-absorbing metasurface layer and a metal ground layer. The top layer of the radiation layer is a dipole antenna, and the tail ends of radiation arms of the dipole antenna are loaded with coupling patches through metal through holes; the middle layer is a dielectric substrate; the top layer of the wave-absorbing metasurface layer is a pair of symmetrical trident-shaped resistive films loaded with metal through holes, and the bottom layer of the wave-absorbing metasurface layer is a dielectric substrate; the metal ground layer is located at the lowermost layer. According to the invention, the wave-absorbing metasurface is embedded in the tight coupling dipole array antenna to replace a traditional metal ground, so that a low-profile structure is realized. According to the antenna, within the frequency band of 7-14 GHz, the wave absorbing efficiency is higher than 75% when electromagnetic waves are incident at the wide angle of 0-60 degrees, meanwhile, good radiation performance and wide-angle scanning capacity are kept, and the radar cross section is remarkably reduced. The method can be popularized to the low radar cross section design of a traditional antenna, and is suitable for radar and wireless communication systems.

The application discloses a kind of vehicle-mounted UWB-AOA circular polarization high-precision positioning antenna, it is related to vehicle antenna positioning technical field.The vehicle-mounted UWB-AOA circular polarization high-precision positioning antenna includes: dielectric substrate and radiation layer, and the feed layer below radiation layer, and radiation layer is installed at substrate bottom, it is characterized in that, still include: the one end array of feed layer is close to radiation layer is installed with circular polarization antenna, and vehicle positioning is carried out based on circular polarization antenna, metal shielding layer for isolating external interference is arranged below feed layer, UWB transceiver module is installed below shielding layer, time stamp controller is installed in UWB transceiver module, the present application is positioned based on circular polarization antenna vehicle, to ensure the receiving stability of signal in complex environment, in turn, still can obtain stable and reliable three-dimensional positioning result under complex environment, and then guarantee the high-precision positioning demand of vehicle under dynamic operation condition.

The present disclosure belongs to the technical field of antennas. Provided are a panel antenna and an electronic device, which can solve the problems of existing panel antennas, such as low aperture efficiency, uneven radiation amplitude, difficulty in achieving multi-frequency coverage. The panel antenna in the present disclosure comprises a waveguide structure, a first dielectric substrate, a radiation layer and a plurality of switch units, wherein the radiation layer has a plurality of slit openings; the switch units are arranged so as to correspond to the slit openings on a one-to-one basis, and are configured to control whether the slit openings corresponding thereto are open / closed; the radiation layer is divided into a middle region and a peripheral region; and the slit openings located in the middle region among the plurality of slit openings are divided into a plurality of groups, each group of said slit openings comprises at least a plurality of first slit openings, at least some of the first slit openings located in different groups have different sizes, and the closer a group of slit openings to the centre of the middle region, the larger the size of the first slit openings in said group of slit openings. The panel antenna in the present disclosure has the advantages of high aperture efficiency, multi-frequency coverage and even radiation amplitude.

The invention discloses an array antenna which comprises a radiation layer, and a plurality of radiation slots are formed in the radiation layer. The cavity layer is arranged below the radiation layer, and the cavity layer comprises at least one coupling slot; and the feed layer is arranged below the cavity layer, a feed network is arranged on the feed layer, and the feed network comprises at least one ridge gap waveguide. According to the array antenna, the gap waveguide transmission line which is low in loss and does not need electric contact is used as the feed network of the antenna, the high-order mode resonant cavity can provide higher flexibility, a more compact structure and lower loss, the top layer is the loaded radiation gap of the rectangular groove, and the antenna is more compact in structure. The design of the groove can reduce the loss of energy at the gap and the leakage of non-radiation energy, and realizes the performance improvement of high gain, low loss and wide band of the miniaturized plane millimeter wave array antenna.

The invention discloses an MEMS infrared light source based on in-situ confinement growth processing and a preparation method thereof, and the preparation method comprises the steps: cleaning a silicon substrate, and carrying out the deposition of a supporting layer and a back supporting layer on the upper surface and the lower surface of the silicon substrate respectively; processing a heating electrode, a heating plane electrode, a growth electrode and a growth plane electrode on the supporting layer on the upper surface of the silicon substrate; etching the upper surface or the lower surface of the silicon substrate to form a substrate cavity; and growing a metal black radiation layer on the surface of the growth electrode through in-situ confinement growth processing. According to the preparation method, the metal black radiation layer is obtained based on in-situ confinement growth processing, so that the metal black radiation layer and the growth electrode are reliably combined; the surface emissivity and radiation efficiency of the MEMS light source are improved, the processing flow of the light source chip is simplified, and the processing cost of integrated processing of the infrared light source device and the black-body-like coating is greatly reduced.

The invention provides an antenna, an antenna array, a base station antenna, an antenna module, an antenna system and a base station, a radiation layer of the antenna is provided with a radiation cavity, the radiation cavity comprises a first cavity, a second cavity and a third cavity which are sequentially arranged and communicated, and the second cavity and the first cavity are partially or completely stacked and communicated. And the second cavity and the third cavity are partially or completely stacked and communicated. Moreover, the length directions of the first cavity and the third cavity are perpendicular to the thickness direction of the radiation layer, and the length direction of the third cavity inclines by a first angle relative to the length direction of the first cavity. Wherein the opening of one side of the third cavity far away from the second cavity is located on the second surface of the radiation layer, and the opening of one side of the first cavity far away from the second cavity is located on the first surface of the radiation layer and is used for being coupled with a feed structure so as to excite the radiation cavity to radiate electromagnetic waves through the feed structure. The antenna provided by the embodiment of the invention has the functions of low loss, broadband, efficient transmission, horizontal scanning, vertical beam forming, dual polarization and the like.

The invention provides a vehicle-mounted antenna, an antenna array, SLP equipment and a vehicle. The vehicle-mounted antenna comprises a first grounding structure, a second grounding structure, a feeding point, a grounding layer and a radiation layer, the radiation layer comprises a first radiation part and a second radiation part, and a first insulation gap is arranged between the first radiation part and the second radiation part. The first grounding structure and the second grounding structure are electrically connected between the first radiation part and the grounding layer, and the feeding point is arranged on the second radiation part to form a 2.5 D antenna form, so that the electrical connection of the grounding layer and the radiation layer is realized, and the size of the overall structure of the antenna is reduced. According to the scheme, the first insulation gap, the first grounding structure and the second grounding structure are arranged in the radiation layer, so that the first radiation part and the second radiation part can be excited to generate different frequency bands, the antenna can support signal transmission of multiple frequency bands at the same time, the multi-frequency-band requirement of the star flash technology is met, the bandwidth of the antenna is widened, and the antenna performance is improved. And the flexibility of the antenna is improved.

An array antenna (10), the array antenna (10) comprising a first radiation layer (11), a first ground layer (12), a power division layer (13), and a coupling layer (14). The first radiation layer (11) comprises first radiation units (111); the power division layer (13) comprises a power division network (131) comprising a power division main port (132) and power division ports (133); and the coupling layer (14) comprises coupling units (141), and each coupling unit comprises a first transmission line (142) and a second transmission line (143) which are coupled. In embodiments of the present disclosure, the coupling units (141) and the power division network (131) are arranged in layers, and the structure of the coupling units (141) is simplified, so as to reduce the mutual influence of the coupling units (141) and the power division network (131). Moreover, the size of the array antenna (10) is reduced to achieve miniaturization, high integration level, and simple structure of the array antenna (10).

This invention relates to the field of glass curtain wall film technology, specifically to a glass curtain wall radiation cooling film and its preparation process. The cooling film has a layered structure, comprising, from the side closest to the glass substrate outwards: a self-healing adhesion layer for forming a high-strength, self-healing interface with the glass substrate; a photothermal response radiation modulation layer disposed on the self-healing adhesion layer for passively adjusting the emissivity of its infrared band according to ambient temperature; a gradient porous radiation layer disposed on the photothermal response radiation modulation layer for efficiently emitting infrared radiation in the 8-13μm band; and an environmentally friendly interface reinforcement layer disposed on the gradient porous radiation layer. This invention, through its self-healing adhesion layer, achieves, for the first time in the field of radiation cooling films, autonomous repair of interface damage, fundamentally solving the problem of debonding failure caused by stress fatigue in curtain wall applications and greatly extending its service life.

The application discloses a miniaturized metasurface antenna, which comprises three layers, namely a radiation layer, an air layer and a feed layer from top to bottom, wherein the radiation layer is provided with a metasurface radiation structure, and the feed layer is a microstrip line slot coupling feed structure; the metasurface radiation structure is composed of 16 square patches arranged in a 4*4 array, wherein a rectangular slot is loaded at the center of each square patch, and a branch is loaded at four corners; the metasurface radiation structure adjusts the equivalent capacitance of the metasurface antenna by changing the length and width of the loaded branch extending into the square patch; and the length of the current of the metasurface antenna is adjusted by changing the length and width of the rectangular slot. Compared with the existing conventional metasurface antenna, the metasurface antenna has the advantages of ensuring a wide impedance bandwidth and high gain of the metasurface antenna in the process of miniaturization.

The present invention relates to a heat transfer expansion plate processing and extraction system, and more specifically, by removing and extracting a heat transfer expansion plate installed inside the piping of the Reactor Coolant System (RCS) on the primary side of a nuclear power plant, the heat transfer expansion plate can be removed by remotely operating an electrical discharge machining (EDM) device and a gripper device installed on the equipment after installing equipment inside the reactor; by processing the heat transfer expansion plate remotely in a high-radiation zone, radiation exposure to workers can be reduced; by precisely processing the heat transfer expansion plate using an EDM device, damage inside the reactor can be prevented; by processing cutting grooves and cutting holes using an EDM device, processing time can be shortened and foreign materials generated during cutting can be minimized; by processing a gripper hole inside the heat transfer expansion plate and inserting a gripper, the heat transfer expansion plate can be stably grasped and pulled; and by processing the position of the gripper hole in the heat transfer expansion plate at a desired location, It has the effect of being able to adjust the gripper shape and overall size of the extraction device.

The utility model relates to the technical field of PCB (printed circuit board) labels, and discloses a UHF (ultra high frequency) band anti-disassembly PCB label for a bank bag lock, which comprises a lock body used for locking a bank bag. The barb structure body is arranged on the lock body; the barb groove is formed in the lock body and is matched with the barb structure body; the PCB tag structure comprises a radiation layer which is used as a main radiation body of a tag antenna; and the anti-tamper inner loop antenna layer is nested on the inner side of the radiation layer, when the bank bag is illegally opened, the tag can be broken due to the design of a reverse anti-tamper V-shaped secant line, so that the anti-tamper inner loop antenna layer is broken, and the tag loses the read-write function, and due to the characteristic, the anti-tamper effect is effectively enhanced, and the illegal opening behavior can be found in time.

The invention discloses a dual-band double-sided ridge waveguide antenna array based on SIW feed. The dual-band double-sided ridge waveguide antenna array comprises a ridge waveguide horn radiation layer, a waveguide transmission layer, a low-frequency feed layer and a high-frequency feed layer. The antenna array is composed of 8 * 8 sub-arrays, and 64 radiation units are designed in total. The 8 * 8 sub-array structure is formed by connecting 64 waveguide transmission units in parallel with feed power division structures through waveguides, high-frequency and low-frequency feed power division structures are designed respectively, the high-frequency feed power division structure is a waveguide structure, the low-frequency feed power division structure is an SIW structure, metal strips between adjacent radiation units are used for reducing the side lobe level of a radiation pattern, and the metal strips are used for reducing the side lobe level of the radiation pattern. And a current path is prolonged by adopting a double-sided ridge waveguide structure, the overall weight of the antenna is reduced, and dual-frequency application of typical satellite communication frequency bands is realized. The antenna has the characteristics of compact structure, light weight, wide impedance bandwidth and the like, and is suitable for potential application requirements of Ku / Ka frequency band satellite communication.

The application belongs to the field of navigation positioning, and aims to solve the problems that the current method based on stacking increases the bandwidth, which leads to the increase of the height of the antenna, and in the case of sharp change of high and low temperature, the gap between the antenna stacks changes, which produces frequency offset, and causes the rapid reduction of the antenna gain. A microstrip antenna device, a navigation device and a manufacturing method are provided. The microstrip antenna device comprises a base, a feed network and a radiation sheet. The feed network and the radiation sheet are stacked, and the feed network is connected with the radiation sheet. The radiation sheet is fixed to the base. The radiation sheet has a first surface away from the feed network. The first surface is provided with a radiation layer. The radiation layer comprises a plurality of radiation sub-layers. At least part of the radiation sub-layers are distributed around the center of the first surface. At least one radiation sub-layer is electrically connected with the feed network. The application can ensure the bandwidth of the antenna, reduce the height of the antenna, and improve the performance of the antenna.

The invention provides a dual-polarization Vivaldi antenna and a base station, the dual-polarization Vivaldi antenna comprises two Vivaldi antenna units which are arranged in a polarization orthogonality mode, each Vivaldi antenna unit comprises a substrate, a radiation layer is arranged on the front face of each substrate, a gradually-changed open slot is formed in each radiation layer, a feed balun is arranged on the back face of each substrate, and the feed balun is arranged on the back face of each substrate. The input end of the feed balun is used for being electrically connected with an external feed network, the feed balun is in coupling connection with the radiation layer, the feed balun is provided with an open-circuit notch to form an open-circuit section and a separated section, and the open-circuit section is connected with the separated section through a resistor. According to the dual-polarized Vivaldi antenna, each Vivaldi antenna unit feeds through a feed balun, the feed balun is provided with an open circuit gap, the open circuit gap divides the feed balun into an open circuit section and a separated section which are not connected with each other, the open circuit section and the separated section are connected with each other through a resistor, impedance matching is achieved by means of the resistor, and the open circuit section and the separated section are matched with each other. And the radiation performance of the dual polarization Vivaldi antenna is optimized.

The invention provides an intelligent protective clothing system for a radiation area, and the system comprises an intelligent protective clothing which is integrated with a plurality of sensors and a data processing and communication unit; the sensor is used for monitoring the physiological parameters of the wearer and the radiation dose of the environment where the wearer is located; the data processing and communication unit is used for collecting physiological parameters and radiation dose; and the remote monitoring platform is configured to operate an AI analysis model, and the AI analysis model is used for fusing the physiological parameters, the radiation dose and the real-time position and movement track of the wearer, dynamically evaluating the real-time risk level of the wearer in the radiation field, and generating a personalized protection strategy based on the real-time risk level. The real-time risk level of the wearer is actively and dynamically evaluated through an AI analysis model, and compared with a simple sensor through a threshold mode, passive alarm is optimized into active monitoring, so that potential safety hazards caused by delayed protection are avoided.

The embodiment of the invention discloses an antenna and a vehicle. The antenna comprises a first feed layer, a first metal sheet and a first radiation layer which are stacked. The first feed layer comprises a plurality of first metal through holes arranged in an array, and the first metal through holes are used for transmitting signals between the first feed layer and the first metal sheet. The first metal sheet is arranged on the surface of one side of the first feed layer, an opening is formed in the first metal sheet, and the first metal sheet is used for transmitting signals to the first radiation layer; the first radiation layer is located on the side, away from the first feed layer, of the first metal sheet, and the first radiation layer is provided with a plurality of metal columns and a plurality of first metal patches; the metal column is located between the first metal sheet and the first metal patch; the first radiation layer is used for transmitting signals to the outside. The antenna provided by the embodiment of the invention is extremely small in thickness, relatively small in size, relatively high in gain and bandwidth and stable in performance, and the problems of performance drift and instability of the antenna in extreme weather are avoided.

The embodiment of the utility model relates to the technical field of antennas, and discloses an integrated antenna and communication equipment, the integrated antenna comprises an antenna main body, an isolation structure and a metal feed structure, the antenna main body is provided with a circuit mainboard, one end of the circuit mainboard is provided with a radiation layer, and the other end of the circuit mainboard is provided with a grounding layer, the radiation layer comprises a first antenna unit and a second antenna unit, the first antenna unit and the second antenna unit are electrically connected with the grounding layer through a metal feed structure, the metal feed structure penetrates through the circuit board, the radiation frequency bands of the first antenna unit and the second antenna unit are different, and the radiation frequency bands of the first antenna unit and the second antenna unit are different. The isolation structure is arranged on the first antenna unit. Through the above mode, mutual interference between the antenna units can be effectively reduced, and the radiation efficiency of the antenna is improved.

A monopole dual-frequency antenna comprises an antenna structure and a mainboard. The antenna structure comprises a circuit board, a high-frequency radiation layer, a low-frequency radiation layer, a conductive metal layer and a half-hole electrode layer. The circuit board is provided with a front surface, a back surface, a top surface, a bottom surface and two side surfaces. The high-frequency radiation layer is arranged on the front surface. The low-frequency radiation layer is arranged on the back surface. The conductive metal layer is arranged on the top surface, one end of the conductive metal layer is electrically connected with the high-frequency radiation layer, and the other end is electrically connected with the low-frequency radiation layer. The half-hole electrode layer is arranged on the bottom surface, penetrates through the bottom surface and is electrically connected with the high-frequency radiation layer on the front surface. The mainboard at least comprises a bonding pad and a signal feed-in layer. The semi-hole electrode layer is electrically and fixedly connected with the bonding pad and the signal feed-in layer, and after a signal is fed in, two current paths are generated at the same time and respectively flow through the high-frequency radiation layer and the low-frequency radiation layer.

The present disclosure relates to an antenna arrangement with a radome. The antenna arrangement comprises a radiation layer (20), an antenna array element arranged in the radiation layer (20), the antenna array element comprising a plurality of antennas (24) distributed in a region having a region length and region width. The arrangement further comprises a radome (1) having a first main surface (1a) facing the radiation layer (20) and a second main surface (1b) arranged opposite of the first main surface (1a), wherein the second main surface (1b) is substantially flat, wherein the first main surface (1a) comprises at least one void space region (100), the at least one void space region (100) extending into the radome (1) towards the second main surface and comprises one or more void spaces and / or indentations acting as a lens, wherein the at least one void space region (100) has a maximum width (W1) that depends on an operational guided wavelength and a maximum length (L1 ) that depends on the length of the region of the antenna array element.

The application discloses a microwave sensor for traditional Chinese medicine reagent detection, and relates to the technical field of sensors, which comprises a dielectric plate, the top surface of the dielectric plate is provided with a radiation layer, the bottom surface of the dielectric plate is provided with a grounding layer, the radiation layer is etched with a radiation unit, and the left and right sides of the radiation layer are provided with microstrip lines; the radiation unit comprises a radiation ring groove, the left and right sides in the radiation ring groove are provided with symmetrical gathering modules, the gathering modules are communicated with the radiation ring groove and are used for prolonging a current transmission path; the middle part of the radiation ring groove is provided with an open ring capacitor arm module, and the two ends of the open ring capacitor arm module are respectively communicated with the radiation ring groove through connecting line grooves. The electromagnetic energy can be maximally gathered in a target detection area by adopting the application, so that the electromagnetic wave radiation intensity is improved, and the detection sensitivity is improved.

The present invention relates to the technical field of communications, and provides an antenna and an electronic device. The antenna in the present invention comprises a reflector plate and a radiation unit arranged on the reflector plate; the radiation unit comprises a plurality of dipoles, and the plurality of dipoles include a first dipole and at least one second dipole; the working frequency of the first dipole is less than the working frequency of the second dipole; each dipole comprises a radiation layer; the radiation layer comprises four radiation portions; the distance between the orthographic projection of the center of each radiation portion of the first dipole on the reflector plate and the orthographic projection of the center of the radiation layer of the second dipole on the reflector plate is a first distance; and a filter structure is provided on the radiation portion corresponding to the smallest first distance. By providing a filter structure on the radiation portion of the first dipole close to the second dipole, coupling between the first dipole and the second dipole is reduced, and interference with the first dipole, i.e., the low-frequency dipole, from the second dipole, i.e., the high-frequency dipole, is reduced, thereby effectively suppressing high-frequency signals.

This invention relates to a compact passive cooling and energy storage unidirectional cooling enclosure device, system, and method, belonging to the field of building energy conservation technology. The device comprises, from top to bottom, an integrated sky radiation layer, a gravity heat pipe heat transfer layer, and a phase change energy storage layer. The sky radiation layer is a high-reflectivity, high-emissivity composite coating used for passive radiative cooling; the gravity heat pipe layer incorporates a porous acrylic support structure and integrally formed heat dissipation fins, with a rectification ratio greater than 3, ensuring efficient unidirectional transfer of cooling energy only from the radiation layer to the energy storage layer; the phase change energy storage layer is encapsulated with paraffin wax with a phase change temperature of 20-30°C, used to store nighttime cooling energy and release it during the day. The advantages of this invention are: it can be directly embedded into the building roof, and through an adaptive working mode of "nighttime cooling storage, daytime cooling release, and winter insulation," it effectively solves the problems of insufficient daytime cooling energy in summer and excessive cold in winter associated with traditional radiative cooling materials, achieving year-round energy conservation without power.

The invention discloses an ultra-wideband radiation integrated array antenna based on a tight coupling structure, which is used for solving the problems of array antenna bandwidth expansion, co-polarization in-band radiation integrated integration and the like. Each unit structure is sequentially composed of a frequency selection structure, a dielectric substrate, a tight coupling dipole staggered radiation layer and a metal reflection plate from top to bottom, a certain gap is reserved between adjacent dipoles on the tight coupling dipole staggered radiation layer to provide capacitive components, inductive components brought by a floor at low frequency are counteracted, and therefore the bandwidth at the low frequency is expanded. The upper layer of the dielectric substrate is covered with a frequency selection structure loaded with a PIN diode, and switching between a radiation mode and a low scattering mode of the antenna is achieved by switching the on-off state of the diode. According to the invention, flexible switching between two working states of ultra-wideband radiation and in-band co-polarization low scattering of the antenna can be realized only by using the PIN diode under the condition that an additional structure is not introduced.

This invention discloses a varicose vein ablation catheter, including a catheter body, a radiation component, a temperature measuring component, a connecting component, and a control unit. The radiation component is disposed on the catheter body and connected to a semi-rigid coaxial cable inside the catheter body. The temperature measuring component is disposed inside the catheter body, close to the radiation component, and measures the temperature inside and outside the radiation area of ​​the radiation component to assist in determining the length of a single ablation session. Advantages: By utilizing three spaced microwave tubes disposed on the catheter body to form three overlapping ablation radiation zones, all three radiation zones can be ablated simultaneously during a single ablation session, enhancing the length of a single ablation session and improving ablation efficiency. The ablation temperature is measured during the ablation process using temperature measuring couplers disposed within and outside the radiation zones, ensuring the ablation effect while the control unit automatically generates a temperature rise curve based on the temperature at different locations, thereby automatically calculating the length of a single ablation session.

The invention discloses a double-frequency positioning antenna and a wireless communication system, and relates to the technical field of antennae, the antenna comprises a first radiation layer, a second radiation layer and a metal ground layer; the first radiation layer comprises at least two first edge parts which are symmetrically arranged, each first edge part comprises two non-linear structures which fluctuate alternately, and the two non-linear structures of the same first edge part are connected with each other and are symmetrically arranged; each first edge part is provided with a first metal substrate; the second radiation layer is electrically connected with the first radiation layer and is arranged opposite to the first radiation layer; the first metal substrate is located between the first radiation layer and the second radiation layer, a first dielectric layer is arranged between the first metal substrate and the second radiation layer, and the first metal substrate and the second radiation layer are connected through the first dielectric layer; the metal ground layer is connected with the second radiation layer; the first radiation layer is provided with two feed parts electrically connected with the metal ground layer; according to the invention, miniaturization, high gain and low cost of the dual-frequency positioning antenna can be realized.

The utility model provides a millimeter wave antenna, a millimeter wave base station antenna and a millimeter wave isolation structure. The antenna comprises a parasitic radiation layer, a main radiation layer and a grounding layer which are sequentially stacked from top to bottom. The parasitic patch on the parasitic radiation layer and the main radiation patch on the main radiation layer can respectively form resonance points and are coupled, so that the bandwidth expansion of the antenna is realized; the upper surface of the grounding layer is provided with a coupling structure, and the lower surface is provided with a feed structure. The feed structure and the coupling structure achieve a dual-polarization mode through two vertically-arranged microstrip gaps, feed signals can be transmitted and coupled to the main radiation layer more effectively, and the wide-beam antenna performance is achieved. Therefore, the antenna has good radiation efficiency in the frequency bands of N257, N258 and N261, and better meets the application requirements of 5G millimeter wave base station antennas. Meanwhile, excellent isolation performance is also realized; in addition, the base station antenna provided by the utility model has the characteristics of simple design and process.