73 results about "Vivaldi antenna" patented technology

The invention relates to the technical field of unmanned aerial vehicle interference, and provides an unmanned aerial vehicle communication link countering system based on a Vivaldi antenna, an antenna array, and the system comprises a signal receiving unit and a signal transmitting unit. Wherein the antenna array is formed by fixing at least two groups of Vivaldi antenna units which are arranged in a staggered manner in the extensible mechanical frame; the broadband interference component is used for responding to the spectrum signal of the to-be-suppressed unmanned aerial vehicle through a receiving unit and generating a first interference signal; wherein the interference frequency band corresponding to the first interference signal is the same as the real-time communication frequency band of the to-be-suppressed unmanned aerial vehicle, and the extensible mechanical frame is used for responding to the first interference signal and determining the number and angle of the expanded area arrays.

The invention discloses a Terahertz broadband high-gain Vivaldi antenna based on a CPW (Coherent Plane Waveguide) rotary slot line structure, and belongs to the field of Terahertz communication. The antenna adopts an integrated single-layer metal structure on the top layer of a dielectric substrate, and is divided into a radiation arm and a CPW rotating slot line balun along the axial direction. The inner side edge of the radiation arm is a smooth exponential change curve, and the middle exponential gradual change groove forms a broadband traveling wave radiation channel. Periodic grid choke grooves are loaded on the outer side edge so as to suppress edge surface waves and improve a directional diagram. The feed part adopts a CPW to slot line balun structure to realize conversion from an unbalanced mode to a balanced mode, and a fan-shaped radial branch knot is utilized to form a broadband virtual short circuit boundary at a feed point to ensure unidirectional efficient transmission of energy. In addition, a group of string-shaped director patches are arranged in the opening area of the exponential gradual change groove along the central axis, and the wave beam is guided through phase correction. The terahertz planar antenna effectively solves the problems of limited bandwidth and insufficient gain of the terahertz planar antenna, and has the characteristics of compact structure, easiness in integration, excellent radiation performance and the like.

The invention discloses a low RCS broadband array antenna based on modification processing and a wave absorbing material and a design method of the low RCS broadband array antenna. The design method comprises the following steps: firstly, designing an ultra-wideband Vivaldi antenna working in an X wave band; then analyzing the radiation and scattering surface current distribution of the antenna in the X wave band, and carrying out shaping processing on the antenna according to a simulation result; performing array design on the designed antenna to form an array antenna; and finally, analyzing the surface current in the radiation and scattering states of the array antenna, covering a higher scattering current area with a wave absorbing material, and reserving a high radiation current area of an antenna slot line area so as to reduce the RCS and reserve the radiation performance of the antenna. The low RCS broadband array antenna is designed by adopting the design method. According to the invention, the design requirements of high gain, high directivity and low RCS of the broadband array antenna are met, the effects of in-band RCS reduction, radiation performance maintenance and multi-angle reduction are considered, and the application of the antenna is expanded.

The invention discloses a micro coaxial ultra wide band Vivaldi antenna and a half mode Vivaldi antenna. The micro coaxial ultra wide band Vivaldi antenna comprises a coaxial feed structure, a fan-shaped feed source and a metal cavity, the coaxial feed structure comprises a coaxial inner core and a coaxial outer conductor, the coaxial inner core is suspended in the coaxial outer conductor, one end of the coaxial inner core is connected with the fan-shaped feed source through a coaxial matching section, and the other end of the coaxial inner core is a free end; the fan-shaped feed source is suspended in the metal cavity, a matching round hole is formed in the metal cavity on one side of the fan-shaped feed source, an exponential gradual change type curve opening is formed in the metal cavity, and the matching round hole is connected with the exponential gradual change type curve opening through an inclined linear gap; comb-shaped gaps are formed in the two sides of the metal cavity; the metal cavity is connected with the coaxial outer conductor; according to the Vivaldi antenna, the antenna loss is reduced through the coaxial structure, the antenna can work at high frequency, the Vivaldi antenna can realize wider impedance matching through the exponential gradual change type curve opening, the comb-shaped gap and the matching round hole, the bandwidth of the Vivaldi antenna is increased, and good gain is kept.

The invention discloses an ultra-wideband miniaturized vertical polarization horizontal omnidirectional radiation antenna, and belongs to the technical field of antenna engineering and wireless communication. The antenna comprises a vertical polarization radiator, a metal top cap, a parasitic metal column, a metal floor and a polarization surface, wherein the vertical polarization radiator is composed of four miniaturized Vivaldi antennas which are placed towards the end-fire direction; the metal top cap and the metal floor are respectively located above and below the radiator, the polarization surface surrounds the periphery of the radiator, and two ends of the parasitic metal column are respectively connected with the metal top cap and the metal floor. The miniature Vivaldi antenna is adopted to form the radiator, so that the problem of distortion of a high-frequency radiation pattern caused by the size of an ultra-wideband antenna is solved; a low-frequency magnetic dipole radiation mode is formed by using the parasitic metal columns, the metal top caps and the metal floor, and the low-frequency bandwidth is expanded. On the basis of miniaturization, the antenna provided by the invention can realize S11lt in 1-6GHz; and vertical polarization horizontal omnidirectional radiation of-10dB is realized, and the out-of-roundness of an omnidirectional radiation pattern is less than 3dB.

The invention discloses an ultra-wideband differential Vivaldi antenna with a reflection-free notch characteristic and a continuous gain test method of the ultra-wideband differential Vivaldi antenna. The Vivaldi antenna is composed of a differential feeder line and a metasurface on the top layer, a metal ground layer on the bottom layer and an intermediate dielectric substrate layer. A gradual change flaring groove line is etched on the metal ground layer of the bottom layer, and the gradual change flaring groove line is composed of a gradual change groove line with an exponential distribution characteristic and a tail end circular open-circuit groove line. Differential mode signals can excite a traveling wave slot mode through a broadband conversion structure formed by the differential feeder lines and the gradually-changed flaring slot lines, then resonance of the whole metasurface can be excited, and non-reflection notch absorption of electromagnetic waves of a target frequency band is achieved through inherent conductor and dielectric loss during resonance of the metasurface. The continuous gain test method overcomes the defect that a broadband balun needs to be additionally designed in a traditional differential antenna gain test, and has the advantages of being simple in test process, accurate in result and the like.

This invention discloses a microwave-millimeter-wave structured multiplexed antenna for vehicle communication, comprising a microwave half-mode Vivaldi antenna, a millimeter-wave vertically polarized oblique-fire phased array, and a millimeter-wave horizontally polarized oblique-fire phased array. The structured multiplexed antenna constructed by this invention embeds the vertically polarized and horizontally polarized millimeter-wave oblique-fire phased arrays into the inherent structure of the ultra-wideband microwave half-mode Vivaldi antenna, forming a seamlessly integrated high-frequency-ratio multi-band antenna. The vertically polarized and horizontally polarized millimeter-wave oblique-fire phased arrays have the characteristics of wide bandwidth, simple structure, and low profile, while the microwave Vivaldi antenna has the characteristics of ultra-wideband bandwidth and miniaturization. The vertically polarized millimeter-wave antenna and the horizontally polarized millimeter-wave antenna respectively utilize multi-mode resonance superposition and equiphase surface adjustment techniques to achieve a stable 45° oblique-fire beam across a wide operating frequency band without adding additional structures.

The invention discloses a log-periodic antenna and an ultra-wide-band dual-polarization low-profile conformal array antenna, and belongs to the technical field of design and manufacturing of ultra-wide-band antennas. The array element is formed by compounding and nesting two types of antennas including a miniaturized log-periodic antenna and a Vivaldi antenna, and the structure is multiplexed. According to the provided miniaturized log-periodic antenna, the broadband miniaturized conformal design is realized through composite loading methods such as array top loading, partial array bending, partial array loading dielectric blocks and the like. On the basis, the invention provides a design method for forming the dual-polarized antenna by nesting a Vivaldi antenna and a log-periodic antenna. A Vivaldi antenna is subjected to left and right block design, a radiation slot and an excitation slot are formed through splicing, and an assembly line of a log-periodic antenna is deployed on a left sector plate and a right sector plate of the Vivaldi antenna. According to the dual-polarization array forming mode, large-curvature conformality of the pitching surface is considered, and pitching surface wide-beam coverage and azimuth surface wide-angle scanning application can be achieved.

The present application relates to the technical field of unmanned aerial vehicle interference, and provides an unmanned aerial vehicle communication link countermeasure system based on a Vivaldi antenna, an antenna array including a signal receiving unit and a signal transmitting unit; wherein the antenna array is fixed in an expandable mechanical frame by at least two groups of staggered Vivaldi antenna units; a wideband interference component: for responding to the spectrum signal of the unmanned aerial vehicle to be suppressed through the receiving unit, and generating a first interference signal; wherein the interference frequency band corresponding to the first interference signal is the same as the real-time communication frequency band of the unmanned aerial vehicle to be suppressed, and the expandable mechanical frame is used for determining the number and angle of the unfolded surface array in response to the first interference signal.

The application discloses a low cross-polarization Vivaldi antenna and belongs to the technical field of electromagnetic fields and antennas. The low cross-polarization Vivaldi antenna comprises a dielectric substrate, a pair of radiation arms and a balanced radiation arm are arranged on the dielectric substrate, and the pair of radiation arms and the balanced radiation arm are oppositely arranged. Metal through holes are formed in the dielectric substrate, and the pair of radiation arms and the balanced radiation arm are electrically connected through the metal through holes. A dielectric director is arranged on one side of the dielectric substrate, and a reflecting floor is arranged on the other side of the dielectric substrate. The dielectric director is used for adjusting the phase difference of electromagnetic waves at the opening of the Vivaldi antenna. The reflecting floor is used for improving the front-to-back ratio of electromagnetic waves. Electromagnetic waves are radiated from the reflecting floor to the direction of the dielectric director. The application further reduces the cross-polarization level of the Vivaldi antenna and can be applied to the fields of satellite communication, ground penetrating radar, microwave imaging and UWB ultra-wideband communication.

The invention discloses a ferrite-loaded dual-polarization wing conformal Vivaldi ultra-wideband one-dimensional phased-array antenna, which comprises a wing carrier contour, a horizontal polarization Vivaldi conformal linear array, a vertical polarization Vivaldi conformal linear array, a vertical polarization embedded dielectric plate, a horizontal polarization embedded dielectric plate, a decoupling patch, a partitioned ferrite, a micro-strip power divider, a fixed substrate and a metal floor, according to the utility model, a conformal and embedded combined layout is adopted, dual-polarization efficient radiation is realized, and electromagnetic coupling interference between two polarization units is suppressed by slotting above horizontal polarization Vivaldi units at two sides, loading decoupling patches and adopting a cross layout; the block type ferrite is located at a specific position above the metal floor; according to the invention, the layout and the appearance of the dual-polarized Vivaldi antenna are designed to realize complete conformality, the end-on-fire gain of a wing carrier under the constraint of a limited space is remarkably improved by utilizing the characteristics of the Vivaldi antenna, and excellent performances such as ultra wide band, wide-angle scanning and low profile are realized by loading ferrite materials.

The utility model provides an ultra-wideband antipodal Vivaldi antenna for an airborne radar, which is used for solving the technical problems of small detection range and low resolution of the airborne radar caused by low low-frequency gain, narrow working band and poor directivity of the conventional antipodal Vivaldi antenna. The antenna comprises a dielectric substrate and a radiation unit, the radiation unit comprises a first radiation arm and a second radiation arm which are symmetrically arranged, the first radiation arm is printed on one side of the front surface of the dielectric substrate, the second radiation arm is printed on one side of the back surface of the dielectric substrate, and a reflection floor is arranged at the line tail part of the back surface of the dielectric substrate. And the reflection floor is connected with the second radiation arm. According to the utility model, radiation current at the edge of the antenna is reduced through the slot at the edge of the antenna, so that the current can be spread along inner edge slot lines at two sides of the antenna all the time and mutually coupled to generate radiation; by adding the reflection floor at the tail part of the back surface of the dielectric substrate, electromagnetic waves can be reflected, and the antenna gain is improved.

The application discloses a kind of ultra-wideband miniaturized Vivaldi antenna based on normalized length space method and manufacturing method, and relates to an ultra-wideband miniaturized Vivaldi antenna and manufacturing method.The present application is to solve the problem that the existing miniaturization method generally faces bandwidth narrowing and design complexity improvement.The antenna substrate according to the present application is provided with a slot line on the front surface, and the bottom of the slot line is connected with a circular slot line.The back surface of the substrate is provided with a fan-shaped metal patch, and the fan-shaped metal patch is connected with the bottom edge of the substrate through a feed line.The steps of the antenna manufacturing method according to the present application include step 1, etching process is used to manufacture a traditional Vivaldi antenna structure on a selected substrate;step 2, after the traditional Vivaldi antenna structure is manufactured, a K value is introduced into the slot line function using the normalized length space method, and the ultra-wideband miniaturized Vivaldi antenna is manufactured.The application belongs to the field of communication technology.

The application discloses a kind of ultra-wideband dual-polarized full-metal array antennas based on isomerism conical unit, antenna array arrangement mode is square grid form, to reduce the influence of edge truncation effect on array, array edge unit and middle unit adopt two structures;Edge unit is basic conical metal Vivaldi antenna;Middle unit is cut in four corners on basic type unit to optimize impedance matching, meanwhile, add orthogonal metal partition in bottom to improve port isolation;Electromagnetic energy is radiated outward at the exponential gradient groove formed by adjacent unit;Antenna array structure includes bottom plate, two kinds of radiating units, commercial standard radio frequency connector.The antenna array of the application has active S parameters below-10dB at each port in the design frequency band, meeting the electrical performance requirements of wideband dual-polarization.The antenna as a whole is made of metal, has high mechanical strength, is convenient to repair and replace, and has wide bandwidth.

The invention discloses an ultra-wideband high-power capacity metal Vivaldi antenna based on local medium loading. The ultra-wideband high-power capacity metal Vivaldi antenna comprises a metal Vivaldi antenna unit, an index gradual change region patch, an impedance conversion region medium patch, an excitation point loading medium and a coaxial loading medium, the metal Vivaldi antenna unit is used for radiating signals and is provided with an index gradual deformation opening, an impedance conversion opening, an excitation point slot line opening and a coaxial feed hollow area from top to bottom; the index gradual change area patch covers the surface of the index gradual deformation opening; the impedance conversion area dielectric patch covers the surface of the impedance conversion opening; the excitation point slot line opening is filled with the excitation point loading medium; and the coaxial loading medium is filled in the coaxial feed hollow area. According to the invention, the overhigh electric field intensity at the edge of the surface part of the antenna unit is effectively reduced, and the breakdown threshold of the partial region is improved, so that the overall power capacity of the antenna is improved.

The invention relates to the field of antenna design, and discloses a VIVALDI antenna for RCS (radar cross section) detection, which comprises a base and a packaging ring mounted on the base, the packaging ring is connected with a plurality of base plates positioned on the outer side of the base, two surfaces of each base plate are sequentially connected with metal radiating surfaces, and the metal radiating surfaces are metal radiating surfaces of the antenna. Antenna index slot lines are further arranged on the two faces of the base plate, the base plate is connected with first open-circuit branches extending into the antenna index slot lines, a certain number of open-circuit branches are loaded on the metal on the two sides of the VIVALDI antenna index slot lines, the surface impedance of the antenna radiating surface can be changed through introduction of the open-circuit branches, and the antenna radiating surface can be improved. The resonance phenomenon of the antenna can be eliminated through the proper branch knot loading position, and the effect of suppressing the distortion of a directional diagram is achieved; in addition, the antenna can serve as a director of the antenna, and the directional diagram distortion effect of the antenna is relieved.

The application relates to the technical field of ground penetrating radar antennas, and discloses an ultra-wideband high-gain Vivaldi antenna loaded with wave-absorbing materials, which comprises a dielectric substrate with a feeding end and a radiating end arranged oppositely and comprising a first plate surface and a second plate surface arranged oppositely; an antenna radiator arranged on the first plate surface and having two radiation arms, the two radiation arms each having a first radiation arm surface facing each other, the two first radiation arm surfaces extending in a direction away from each other from the feeding end to the radiating end so that a gradually expanding groove is formed between the two first radiation arm surfaces; a circular matching groove is arranged on the antenna radiator and close to the feeding end; a wave-absorbing module is arranged on each side end of the two radiation arms away from each other; a metal director is arranged on the first plate surface and located at the radiating end; a reflector is internally provided with a reflection cavity, at least part of the feeding end is inserted into the reflection cavity, and a spacing is formed between the feeding end and the side wall of the reflection cavity. The Vivaldi antenna can alleviate the defects of low gain at low frequency, insufficient impedance bandwidth and low front-to-back ratio of the conventional Vivaldi antenna.

It consists of a Vivaldi (4) Palm Tree class antenna connected to port 1 (8) of a vector network analyzer (5) by a coaxial cable (9), and in front of the Vivaldi (4) Palm Tree class antenna, a test tube (10) containing dielectric material (liquid under analysis) is inserted. This material is identified by its dielectric characteristics through the analysis of the reflection coefficient of an ultra-wideband (UWB) signal that ranges from 1500 to 2500 MHz with a power of 1 dBm.

The invention discloses a mechanical arm adaptive dual-polarization miniaturized Vivaldi antenna which comprises a horizontal polarization antenna printed board, a vertical polarization antenna printed board and a reflection floor. A director, an index gradual change slot line and a decoupling extension branch knot are printed on the bottom layer of a polarized antenna printed board, a fan-shaped microstrip line and a gradual change microstrip line are printed on the top layer of the polarized antenna printed board, and an index contour slot, a circular resonant cavity and a circular slot line resonant cavity are formed in the index gradual change slot line; the substrate supporting structure is formed by extending two printed board substrates and used for forming an air gap between the antenna and the reflection floor, and the two printed boards are arranged in a staggered mode through slotting. The reflection floor is provided with a slot and a hole which are respectively used for fixing the substrate supporting structure, installing bolts and routing coaxial cables. High-frequency gain is improved through the director, low-frequency impedance matching is optimized through the slotting technology, coupling interference of the metal mechanical arm is restrained by combining an air gap and a decoupling extension branch knot, and the dual-polarization characteristic is adapted to a complex electromagnetic environment.

The invention relates to a three-dimensional ultra-wideband Vivaldi antenna, and belongs to the technical field of electromagnetic fields and microwaves. The antenna is expanded in the H-plane direction, and a traditional planar antenna is converted into a three-dimensional antenna, so that the radiation aperture area of the antenna is effectively increased, and the radiation efficiency of the antenna is improved. The antenna comprises a feed structure and a double-radiation structure, the feed structure is composed of a coaxial line, a microstrip line and two microstrip line-to-parallel double lines, and the double-radiation structure is composed of two Vivaldi antennas which are the same in shape and are in mirror symmetry. Under the condition that the size of the E surface of the antenna is kept unchanged, the radiation aperture area is increased through the three-dimensional design, the radiation efficiency of the antenna and the aperture utilization rate of the array antenna are effectively improved, the technical problems that a traditional planar Vivaldi antenna is low in radiation efficiency, and the aperture is wasted during array application are solved, and the antenna is suitable for large-scale popularization and application. And miniaturization of the array antenna can be realized to a certain extent. In addition, the antenna structure form has high universality and can be suitable for antennas in other forms.

The invention discloses an ultra-wideband directional antenna applied to a 5G communication indoor distribution system, which comprises a Vivaldi antenna and a metal back cavity, and is characterized in that the Vivaldi antenna comprises two antenna metal surfaces, a feed metal strip line and a metal director oscillator; the antenna metal surface comprises a first metal panel, a second metal side wall panel and a third metal side wall panel; the first metal panel is provided with a trumpet-shaped notch; the two second metal side wall panels are arranged along the side edges of the trumpet-shaped notch respectively to form a two-dimensional trumpet surface; the two third metal side wall panels are respectively connected with the outer ends of the second metal side wall panels; and the feed metal strip line is located between the antenna metal surfaces and excites the double-layer metal surfaces, and current distribution is symmetrical, so that a balanced balun feed structure is formed. According to the invention, the characteristics of ultra wide band and low profile are realized, the gain in the working frequency band is stable, the radiation pattern also has good directivity and symmetry, and the whole antenna is of a metal structure, so that the cost is low and the processing is easy.

The present invention discloses a multi-port, high-frequency-ratio antenna, comprising a metal floor and a dielectric substrate. Metal patches are connected to the surface of the dielectric substrate. The metal patches include a first metal patch and a second metal patch. The first and second metal patches are both E-shaped patches, each having a first branch and a second branch located in the center of the E-shaped patch. The first branch is provided with a first Vivaldi antenna unit, the second branch is provided with a second Vivaldi antenna unit, and the antenna further includes a third Vivaldi antenna unit and a fourth Vivaldi antenna unit. By integrating a dipole antenna unit with four Vivaldi antenna units, the specific shape of the dipole antenna unit provides two different resonant paths, achieving dual-band operation in the microwave band. The four Vivaldi antennas operate in the millimeter-wave band. The antenna can operate simultaneously in the microwave and millimeter-wave bands, achieving a high frequency ratio and covering commonly used Wi-Fi, Bluetooth, and 5G communication bands.

The invention provides a photovoltaic direct-current series arc detection method and device and electronic equipment, and the method comprises the steps: collecting an electromagnetic signal in a photovoltaic system through a Vivaldi antenna; performing time-frequency feature extraction on the electromagnetic signal to obtain a time-frequency feature map; and carrying out image recognition on the time-frequency characteristic pattern through a pre-trained SE-YOLOv8 network, and determining whether the photovoltaic system has an arc fault or not. According to the invention, non-contact arc detection can be realized, the characteristic boundaries of the arc and the non-arc can be effectively identified, and the problem of poor accuracy of the detection result in the prior art is solved.

The invention discloses a miniaturized ultra-wideband and dual-polarization angle and frequency reconfigurable Vivaldi antenna, which comprises two antenna units which are arranged in a crisscross manner, each of the two antenna units comprises a dielectric substrate, an antenna radiating surface, a feed port and a PIN diode, the antenna radiating surface is divided into a high-frequency radiating surface and a low-frequency radiating surface, and the feed port is connected with the dielectric substrate. The high-frequency radiating surface and the low-frequency radiating surface are connected through a PIN diode, and the working frequency is selected through the connection and disconnection of the PIN diode; the high-frequency radiation surface is provided with a feed port. And an auxiliary bracket capable of selecting a plurality of cross angles is arranged at the cross connection position of the two antenna units. Compared with an existing dual-polarization Vivaldi antenna, the dual-polarization Vivaldi antenna can be selectively provided with a bridge to achieve switching between single polarization and dual polarization, a multi-angle dual-polarization adjusting effect is achieved by changing the cross direction through the support, and space utilization and multi-scene application are achieved by fully utilizing the array interval size.

The application belongs to the technical field of communication, and particularly relates to a kind of miniaturized Vivaldi antenna of ultra-wideband.The antenna contains a dielectric substrate, the upper surface of which contains an exponential tapered slot main Vivaldi antenna, four resistors and two rectangular metal patches, artificial surface plasmon;The lower surface is a feed network, containing 6 sections of impedance transformation microstrip transmission line, sector transmission line and circular slot;The main antenna is placed in the center of the dielectric substrate, the four resistors are placed at the end of the main antenna, and the resistors are connected to the two rectangular patches behind;Artificial surface plasmon is placed in the middle of the main antenna's tapered slot;The multi-section impedance transformer of the feed network and the microstrip slot line structure are placed in alignment with the circular slot of the main antenna.The application realizes ultra-wideband, miniaturization and high radiation gain through the design of the main antenna, edge slotting, resistor loading and artificial surface plasmon.The antenna's operating frequency band is 0.2 GHz to 18 GHz, and it has the characteristics of miniaturization.

The invention belongs to the field of array antenna design, and particularly relates to a radar cross section control structure based on a variable resistor and a Vivaldi array antenna with the radar cross section control structure. The radar cross section control structure based on the variable resistor comprises a dielectric substrate which is provided with an upper surface, a lower surface and a side surface; the metal radiation patch is printed on the upper surface of the dielectric substrate; the feed structure is printed on the lower surface of the dielectric substrate; and the load impedance is welded at the end parts of the metal radiation patch and the feed structure, and is positioned on the side surface of the dielectric substrate. The Vivaldi array antenna comprises a plurality of Vivaldi antenna units which are arranged in an array mode, each Vivaldi antenna unit is provided with a radar section control structure based on a variable resistor, and reduction and control of a scattering field of the Vivaldi array antenna are achieved by controlling a load impedance value of load impedance of each Vivaldi antenna unit.

The invention discloses a modular high-gain circularly polarized Vivaldi array antenna. The modular high-gain circularly polarized Vivaldi array antenna comprises an edge antenna, a middle antenna and a mounting base, the mounting base comprises a square metal plate printed with a feed layer, four edge antennas and / or middle antennas are inserted on the square metal plate, an X-direction plane and a Y-direction plane which are perpendicular to each other are formed in pairs, and a feed source seat is arranged in the center of the square metal plate; the edge antenna and the middle antenna are of a sheet-shaped structure and are composed of a bottom insertion structure and a top antenna structure, and the bottom insertion structure comprises an insertion column and a wiring path; the feed balun is connected with a feed source, and then the edge antennas and / or the middle antennas which are located on the same plane are connected with each other through a wiring path to form a Vivaldi antenna; the mounting bases for mounting the antennas are arranged in an array to form a Vivaldi array antenna, the antennas at the edges of the Vivaldi array antenna are edge antennas, and the other antennas are middle antennas. According to the invention, the modular circularly polarized Vivaldi array antenna can be realized, the structure is compact, and the antenna gain and expandability are relatively high.

A 2-70GHz ultra-wideband, all-metal Vivaldi antenna includes a metal plate with a supporting base plate at its bottom. A coaxial connector passes through the supporting base plate and connects to the metal plate. An exponentially tapered curve opening is formed on the upper inner side of the metal plate, and a matching circle is formed on the lower part of the metal plate. An inclined slot is formed on the metal plate between the exponentially tapered curve opening and the matching circle. The starting end of the exponentially tapered curve opening is connected to one end of the inclined slot, and the other end of the inclined slot is connected to the matching circle. The inner conductor of the coaxial connector contacts the upper surface of the end where the inclined slot and the matching circle are connected. Traditionally designed Vivaldi antennas rarely operate at frequencies of 40GHz and above. This Vivaldi antenna, by optimizing the thickness of the Vivaldi metal plate, allows the antenna sample to operate at frequencies greater than 70GHz with a return loss exceeding 10dB. This invention features a simple structure, low cost, ultra-wideband capability, and stable radiation pattern.

The application discloses a dual-polarized pure metal Vivaldi phased array, belongs to the technical field of wireless communication, and solves the problem of how to realize dual-polarized radiation of a Vivaldi antenna and improve impedance bandwidth during antenna expansion scanning; the first Vivaldi antenna and the second Vivaldi antenna are orthogonally arranged on the upper surface of a metal base, and the orthogonal positions coincide with the geometric center of the upper surface of the metal base; the first Vivaldi antenna and the second Vivaldi antenna are internally provided with an exponential slot, a slit and a metal cavity which are sequentially connected; the first coaxial line and the second coaxial line each comprise an inner conductor and an outer conductor; the inner conductor sequentially penetrates through the metal base, the metal cavity and is connected with the bottom of the slit, and the outer conductor penetrates through the metal base and is connected with the bottom of the metal cavity; the application is based on a feeding matching structure which is sequentially connected, utilizes coaxial differential feeding and multi-stage cavities and a gradually-changing slit to jointly act, realizes good impedance transition, and can realize a wide impedance bandwidth.

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.