330 results about "Horn antenna" patented technology

The utility model relates to the technical field of wave-absorbing material testing, and discloses a wave-absorbing material flat plate reflectivity testing device which comprises a flat plate sample table and a horn antenna matched with the flat plate sample table, the flat sample table comprises a cylindrical rod, a base, a rotating track, a table top and an inverted T-shaped metal panel which are connected with one another; the inverted T-shaped metal panel is driven to rotate along the circumferential direction when the rotating track on the table top rotates; the testing sample is arranged on one side face, facing the horn antenna, of a vertical panel of the inverted-T-shaped metal panel, and when the rotating track rotates in the circumferential direction, the inverted-T-shaped metal panel is driven to rotate in the circumferential direction, or the angle between the vertical panel and a horizontal panel of the T-shaped metal panel is adjusted, so that the testing sample is tested. And direction angles and pitch angles between the plane of the test sample and the horn antennas can be adjusted. The device has the advantages of being flexible and convenient to use, small in occupied area, capable of achieving multi-stage adjustment, high in testing precision and the like.

The invention belongs to the technical field of antennas, and particularly discloses an ultra-wide-band low-profile conformal double-ridge horn antenna which comprises a plurality of antenna radiation units which are arranged in a surrounding mode in the circumferential direction of an aircraft platform and can be installed with the aircraft platform in a conformal mode, and each antenna radiation unit comprises a double-ridge assembly and a feed assembly. Wherein the double-ridge assembly comprises a first ridge unit and a second ridge unit which are symmetrically arranged left and right, the opposite inner side surfaces of the first ridge unit and the second ridge unit are of curved surface structures, and the first ridge unit and the second ridge unit jointly form a horn section at the top and a waveguide section at the bottom; and the feed assembly is arranged on the waveguide section and is used for feeding to the first ridge unit and the second ridge unit. According to the horn antenna, through the structural design, the overall structure of the antenna is relatively compact, the size is relatively small, the height and the profile size of the antenna radiation unit can be reduced through the double-ridge curved surface structural design, and meanwhile the excellent frequency band width is achieved.

The invention discloses a miniature microwave electric field intensity measurement method based on Rydberg atoms, and belongs to the field of microwave electric field measurement. The implementation method comprises the following steps: scanning through an alkali metal atom gas chamber by using first probe light, scanning through the alkali metal atom gas chamber by using first coupling light, radiating a microwave electric field to be detected to the alkali metal atom gas chamber, obtaining an EIT-AT split spectrum, and obtaining the microwave electric field to be detected; if the EIT-AT splitting spacing is not available, a local oscillation microwave electric field can be radiated to the alkali metal atom gas chamber at the same time, a microwave electric field to be measured is obtained through an atom superheterodyne method, and rapid measurement of the intensity of the miniaturized microwave electric field based on Rydberg atoms is achieved. The device for realizing the method comprises a first laser, a first dichroscope, an alkali metal atom gas chamber, a second laser, a second dichroscope, a photoelectric detector, a first standard gain horn antenna and a second standard gain horn antenna. Frequency locking does not need to be carried out on detection light and coupling light, light path devices can be reduced, and the application range is wide.

The invention provides a microwave superheterodyne frequency sweep measurement system based on Rydberg atoms, and belongs to the technical field of microwave frequency measurement. The laser module excites detection light of 780 nm and coupling light of 480 nm, and the two beams of light are reversely input into the atomic gas chamber through the dichroscope; signal microwaves are generated by a radio frequency signal source and are radiated to the position of the atomic gas chamber through the horn antenna; local oscillation microwaves are generated by the microwave module and are also radiated to the position of the atomic gas chamber through the horn antenna; the atomic gas chamber serves as a mixer to form a difference frequency signal; the spectrum analyzer is used for monitoring low-frequency difference frequency signals generated in the frequency mixing process in real time and recording signal intensity in real time. According to the invention, high-precision and wide-band microwave frequency measurement is realized, continuous and smooth frequency sweeping response can be provided in a frequency range, and absolute frequency detection of microwave signals is realized under the condition that a complex frequency comb technology is not introduced. The hardware architecture is simplified, the automation degree is improved, and integration, popularization and application are facilitated.

The present invention discloses a broadband 1-bit reconfigurable circularly polarized reflectarray antenna based on a multi-resonant structure, which includes a reconfigurable circularly polarized reflection functional layer, a circularly polarized horn antenna, and an acrylic bracket. The reconfigurable circularly polarized reflection functional layer is composed of M×N circularly polarized reflectarray antenna elements with the same structure, which are periodically arranged at an interval of 0.4125λ0. The circularly polarized reflectarray antenna element consists of a radiation layer and a DC bias layer. The radiation layer includes a circuit pattern designed based on a multi-resonant structure, PIN diodes, a radiation dielectric layer, and a reflection bottom plate. The DC bias structure includes a DC bias dielectric layer and a DC bias circuit. By controlling the on-off states of four PIN diodes, 1-bit regulation of the unit reflection phase can be achieved. By adjusting the states of each circularly polarized reflectarray antenna element, a beam scanning function of ±60° can be realized, and it can be applied in wireless communication and satellite communication systems.

The invention discloses a near-field focusing microwave thermal therapy device and method based on a Huygens metasurface. The device comprises a feed source antenna, a Huygens metasurface array and a biological tissue model. The feed source antenna is a 5.8 GHz double-ridge horn antenna and is used for transmitting x-polarized electromagnetic waves; the Huygens metasurface array is formed by periodically arranging double-layer through-hole-free Huygens units, anti-symmetric E-shaped metal patterns are symmetrically arranged on the upper surface and the lower surface of the single-layer PCB substrate, and phase regulation and efficient transmission are achieved by adjusting unit structure parameters; the biological tissue model is of a two-layer structure attached to the Huygens metasurface array, electromagnetic waves emitted by the feed source antenna are subjected to phase compensation regulation and control through the Huygens metasurface array, and then near-field focusing is achieved on the surface layer of the biological tissue, so that the electric field intensity, the SAR value and the temperature of a target area reach design threshold values respectively, and the target area is obtained. And local precise heating of electromagnetic resonance and phase regulation is formed. According to the invention, an efficient, stable and easy-to-implement technology is provided for local precise heating in microwave hyperthermia.

The invention relates to a neural network angle measurement method applied to a beam waveguide reflector antenna, and belongs to the technical field of microwaves. Building a neural network angle measurement system applied to the beam waveguide reflector antenna, wherein the neural network angle measurement system comprises a receiving antenna array and a neural network angle measurement model; acquiring two-dimensional directional diagram data; in a non-uniform radiation field, echo signal amplitude information received by a 16 horn antenna feed source is used as input of an angle measurement system, an azimuth angle and a pitch angle are used as output of the angle measurement system, and neural network training is carried out; and deploying the generated neural network angle measurement model in an echo receiving and processing system. According to the characteristic that different array antenna energy distributions correspond to different echo incident directions, angle measurement is carried out by using a neural network algorithm. According to the angle measurement system trained through the neural network algorithm, an accurate angle measurement result can be obtained.

For improved Ku band communications, an antenna system includes a planar antenna surface, at least one waveguide feed network, and a waveguide. The planar antenna surface is coupled to at least one port. The at least one waveguide feed network includes an H plane junction splitter and at least two E plane junction splitters. The H plane junction splitter is disposed on a channel septum in a channel. A splitter axis of the channel septum and the H plane junction splitter is rotated about a P axis. The at least two E plane junction splitters are each disposed on septum and coupled to the H plane junction splitter via the channel. The waveguide is coupled to the waveguide feed network.

The utility model relates to a broadband wide-beam horn antenna, which comprises an antenna main body, a feed port, a feed probe, a polarizer, a waveguide and a beam widening structure, the antenna body is in a cuboid shape with an opening in the upper middle end inside, through holes are formed in the left side face and the right side face of the antenna body, feed ports are connected to the through holes, feed probes are arranged in the feed ports, a polarizer is vertically connected to the bottom face inside the antenna body, and the polarizer is located between the two feed probes. The open end of the antenna main body is connected with a waveguide, and the inner diameter of the waveguide is gradually increased along the direction close to the antenna main body to form a horn shape with a big-end-down opening; the side surface of the waveguide is provided with a wave beam widening structure which extends outwards. The antenna with the structure has the advantages that the antenna with the structure can achieve the wide-beam antenna gain of 1.5 dB within + / -60 degrees and the wide-beam antenna gain of-0.5 dB within + / -70 degrees; and the working bandwidth can reach 10%. And the diameter is only 1.27 times of the wavelength of the lowest working frequency.

The invention provides a desensitization easy-to-process high-power millimeter wave waveguide matching load and application, the desensitization easy-to-process high-power millimeter wave waveguide matching load comprises a circular waveguide horn antenna and a high-loss dielectric block used for absorbing electromagnetic waves, and the circular waveguide horn antenna comprises a standard rectangular waveguide section, a rectangular waveguide-circular waveguide transition structure, a circular waveguide section, a conical horn and a circular waveguide section; the high-loss dielectric block comprises a bottom circular truncated cone, a middle circular truncated cone and a top circular truncated cone structure which are connected in sequence; the top circular truncated cone structure is a gradually-changing solid structure or a core-removing structure with a wedge-shaped block removed, and electromagnetic waves are fed into the circular waveguide horn antenna from the rectangular waveguide and are converted into dielectric loss by the high-loss dielectric block when reaching the tail of the horn antenna, so that incident electromagnetic energy is absorbed, and the dielectric loss of the horn antenna is reduced. The top circular truncated cone structure of the dielectric block is used for impedance matching and reflection reduction; the core circular truncated cone structure of the core-removing structure further reduces the sensitivity of the matching load performance to the precision error of the dielectric block due to the fact that the matching structure is located at the position with a weak electric field.

The invention relates to the technical field of wireless communication, and particularly discloses an ultra-wideband high-power dual-polarized horn antenna, which comprises a horn body with a ridge inside, a feed cavity arranged at the flange end of the horn body, and an N-type connector mounted on the feed cavity and connected with the ridge, the flange end of the horn body is of a quadrilateral structure; the radiation end of the horn body is of an octagonal structure, and a quadrangular structure is gradually transited into the octagonal structure in the radial direction of the octagonal structure. The antenna has the advantages of being wide in working frequency band, large in tolerance power (larger than 500 W), low in standing wave, capable of linearly increasing the gain along with the frequency and the like.

The invention discloses a dual-linear polarization independent control low-profile reflective array antenna with a gain filtering characteristic. The antenna comprises a plane reflection array formed by a plurality of reflection units, and a horn antenna. The reflection unit comprises a magnetoelectric dipole loaded with a split ring resonator, an x polarization feed part and a y polarization feed part, each feed part comprises an independent feed arm and an open-circuit metal microstrip line patch, and the feed arm and the open-circuit metal microstrip line patch are connected through a metalized via hole; energy received by the magnetoelectric dipole in a working band can be coupled to the feed arm, transmitted to the open-circuit metal microstrip line patch from the feed arm through the metalized via hole, and reflected on the open-circuit metal microstrip line patch, so that the reflection phase can be changed by adjusting the length of the open-circuit metal microstrip line patch. A radiation zero point is introduced at a low frequency by utilizing the characteristics of the magnetoelectric dipole, and a radiation zero point is introduced at a high frequency by utilizing the half-wavelength resonance characteristics of the split ring resonator, so that the filtering characteristic is realized.

The invention discloses a multi-channel switching antenna based on a translation reconfigurable metasurface array, and relates to a multi-channel switching antenna design technology, in particular to a function of translation regulation and control of a beam deflection angle of a translation reconfigurable metasurface. And therefore, the functions of channel switching, dual-channel output and the like can be achieved. The multi-channel switching antenna comprises a translation reconfigurable metasurface array, a mechanical driving system, a feed circuit and a horn antenna array. The main process of the design method is that phase distribution of the translation reconfigurable metasurface is solved based on the generalized Snell law, the differential equation and the Rayleigh-Sommerfeld formula, then the metasurface unit structure and the translation reconfigurable metasurface which meet the requirements are designed through electromagnetic simulation software, arraying is conducted on the translation reconfigurable metasurface, and finally the translation reconfigurable metasurface is obtained. The multi-channel switching antenna based on the translation reconfigurable metasurface array is obtained, and the functions of channel switching, dual-channel output and the like can be achieved.

A large-scale antenna array absolute power calibration method is characterized in that a standard gain antenna is installed at an unoccupied position of an antenna array surface, a group of electronic switch matrixes are installed between the standard gain antenna and an antenna array radio frequency feed channel, and a tuner for receiving signals is in a form that four loudspeakers are perpendicular to each other. A wide-frequency-band horn antenna covering the working frequency band of the system is additionally arranged at the central position of a tuner of system calibration equipment; the calibration equipment computer gates the wide-band horn antenna by controlling the electronic switch, receives signals radiated to the inherent antenna of the antenna array and the additionally installed standard gain antenna respectively, and analyzes and calculates the absolute power of the system through a comparison method; the method does not need to frequently replace and erect standard antennas to calibrate the absolute power, greatly improves the calibration efficiency of the absolute power of the large antenna array, reduces errors caused by manual replacement of the fixed standard antennas, and effectively improves the test efficiency.

The invention discloses an ultrathin dual-polarized lens antenna based on a double-layer Huygens metasurface, and relates to the technical field of plane transmission array antennas. The ultrathin dual-polarized lens antenna based on the double-layer Huygens metasurface is provided with a horn antenna feed source module and a double-layer Huygens metasurface module. The double-layer Huygens metasurface module is composed of a medium supporting layer in the middle and metal patch layers of which the top layer and the bottom layer are identical in structure. The unit grids of the double-layer Huygens metasurface module are arranged according to hyperbolic phase distribution to form a super-lens function, and quasi-spherical waves emitted by the horn antenna feed source module are converted into plane waves emitted in a single direction, so that the directivity and radiation gain of electromagnetic waves are improved. The antenna has the advantages of dual polarization response, ultra-thin thickness smaller than one tenth of wavelength, easy integration, high radiation gain and high aperture efficiency, and can be widely applied to the fields of millimeter wave communication systems, wireless power transmission and the like.

The invention discloses a waveguide horn antenna and a millimeter wave radar system, relates to the technical field of antennas, realizes the design of a waveguide antenna scheme and a radar through a step structure which is easy to process and realize, and compared with most schemes at the present stage, has the advantages of fewer processing layers, no waveguide power divider structure in the antenna, suitability for large-scale mass production with lower cost, and low cost. In addition, by designing a cross array air slot structure and an H-shaped array air slot structure, azimuth angle measurement fluctuation and channel consistency fluctuation are improved.

The invention belongs to the technical field of antennas, and particularly relates to a low-profile single-layer dual-polarization structure composite array antenna for a C / K wave band. Comprising a dielectric substrate, the lower surface of the dielectric substrate is a metal floor, and m * m composite array elements are integrated on the upper surface; each composite array element comprises a square ring structure and a Jerusalem cross structure arranged in the square ring structure, and the Jerusalem cross structure and the square ring structure are not in contact and coincide in center; all the square ring structures form a C-band array antenna, super units are divided according to n * n, and each super unit is fed through an SMA coaxial line; all the Jerusalem cross structures form a k-band reflective array antenna, super units are divided according to z * z, and each super unit is connected with a horn antenna through a waveguide for coupling radiation; wherein: nlt; zlt, zlt; m, z and n are positive numbers. According to the invention, multiplexing of a C / K wave band antenna structure is realized by using the single-layer dielectric substrate, the height is reduced, the process is simplified, the cost is reduced, the antenna is suitable for a multi-frequency satellite communication system, and large-scale array arrangement can provide high-gain radiation.

The invention belongs to the technical field of antennas, and discloses a reflection unit based on a metasurface and an array antenna thereof. Comprising a linear polarization horn antenna feed source and a metasurface reflection array. The array is composed of reflection units which are arranged periodically, and each reflection unit comprises a metal resonance layer, a dielectric substrate and a metal back plate from top to bottom. The metal resonance layer comprises a non-uniform line width structure formed by a central metal strip and two symmetrically connected arc-shaped metal arms, namely, the line width of the central metal strip is unequal to that of the arc-shaped metal arms, so that the loss of the reflection unit is effectively reduced, and coupling between amplitude and phase regulation is remarkably reduced. The reflection phase of the reflection unit is realized by adjusting the central angle corresponding to the arc-shaped arm, and the reflection amplitude is realized by adjusting the rotation angle of the whole metal resonance layer around the normal axis of the metal resonance layer. Through joint optimization of parameters and array arrangement of each unit, excellent performance of low sidelobe level, low cross polarization level and high aperture efficiency is finally realized.

The invention aims to provide a medium-loaded ultra-wideband miniaturized double-ridged horn antenna, and belongs to the technical field of double-ridged horn antennas. A dielectric structure loaded on a horn mouth surface in the antenna comprises a dielectric lens, a dielectric flat plate and a dielectric guide section with a specific shape, and through loading of an integrated dielectric structure formed by the dielectric lens, the dielectric flat plate and the dielectric guide section, impedance mutation from a metal waveguide to a free space can be optimized, and reflection is reduced; electromagnetic waves are guided to converge, beam divergence is reduced, and the directivity and gain of a main lobe are improved; meanwhile, the wavefront of the horn mouth electromagnetic wave can be corrected to be a plane wave, phase distortion is reduced, and the far-field directivity is improved; focused electromagnetic waves are refracted, side lobes are reduced, and main lobe gain is improved. The ultra-wide-band miniaturized double-ridge horn antenna has excellent comprehensive performance of ultra wide band, miniaturization, high gain and low side lobe.

The invention provides an automatic assembling platform for a radar liquid level meter shell, and belongs to the technical field of liquid level meter shell assembling. The platform comprises an assembling table, an air suction cylinder, a jacking table and a driving column. A plurality of sets of mounting grooves are formed in the assembling table in a penetrating mode, a plurality of sets of air exhaust channels and clamping cavities are formed in the assembling table, and a plurality of sets of air exhaust fixing holes are formed in each set of air exhaust channel in a communicating mode; the multiple sets of air exhaust channels rotate along with the assembly table to alternately and correspondingly communicate with the air exhaust groove. The jacking table is located below the assembling table and is configured to rotate relative to the jacking table; when rotating along with the assembly table, the driving column is driven by the jacking table to slide and lift in the clamping cavity, and the clamping plate is driven by lifting linkage of the driving column to slide in the mounting groove and used for clamping the horn antenna. According to the automatic assembling platform for the radar liquid level meter shell, the liquid level sensor can be doubly fixed, the liquid level sensor can be fixedly installed conveniently, and the assembled radar liquid level meter can be disassembled.

The utility model discloses a compact range measuring system, which relates to the technical field of compact range measurement and comprises a horn antenna, a compact range reflecting panel and an environment wave-transmitting box, the horn antenna is arranged below the compact range reflecting panel and can emit electromagnetic waves, the compact range reflecting panel is arranged outside the environment wave-transmitting box, and the environment wave-transmitting box is arranged outside the compact range reflecting panel. The compact range reflection panel can reflect electromagnetic waves, the box body of the environmental wave-transparent box can allow the electromagnetic waves to pass through, the internal space of the environmental wave-transparent box can accommodate a measured target, and environmental parameters of the internal space of the environmental wave-transparent box can be adjusted; according to the utility model, compact range measurement under different environmental conditions can be realized.

To provide a dielectric constant measuring method for reducing an analysis error of a dielectric constant in measurement by a free space method.SOLUTION: The method includes a step of preparing a first complex electric field distribution on an incident plane P1 of a dielectric sample 33, a step of preparing a second complex electric field distribution on an emission plane P2 of an electromagnetic wave transmitted from a receiving horn antenna and assumed to be incident on the dielectric sample 33 in a direction opposite to an emission direction of the electromagnetic wave, a step of calculating an angular spectrum distribution on a wave number space by inverse Fourier transformation of the first complex electric field distribution, a step of measuring a thickness of the dielectric sample 33 in a direction along an electromagnetic wave transmission direction, a step of calculating a reference of a complex electric field distribution which is a complex electric field distribution when the electromagnetic wave propagates in a free space by a distance corresponding to the thickness, and a step of obtaining a third complex electric field distribution of the electromagnetic wave propagating in the emission direction on the emission plane P2.SELECTED DRAWING: Figure 2

The embodiment of the invention provides a horn antenna, and relates to the field of antennas. The horn antenna comprises an antenna body, the antenna body is in a horn shape, the inner side radius and the axial position of the antenna body meet the function relation of index gradual change, and a plurality of annular tables are arranged on the outer periphery of the antenna body at intervals in the axial direction of the antenna body. The horn antenna provided by the invention has the excellent radiation performance of beam equalization, low side lobe, low cross polarization and the like of a traditional inner corrugated horn antenna, but is easier to process and implement at low cost, and can also avoid the problem of breakdown between inner corrugated walls of the traditional corrugated horn antenna during high-power microwave radiation, thereby improving the electromagnetic wave radiation capability.

An integrated fan-out (InFO) package includes a die, an encapsulant, and a horn antenna. The die has an active surface and a rear surface opposite to the active surface. The encapsulant laterally encapsulates the die. The horn antenna is electrically connected to the die. The horn antenna includes a top wall and a bottom wall respectively located on two opposite sides of the die and the encapsulant. A portion of the top wall is located within a span of the active surface of the die. A portion of the bottom wall is located within a span of the rear surface of the die.

A dual-polarized four-ridge horn antenna disclosed by the present invention comprises a horn section and a waveguide section, the horn section comprises a horn shell and four ridges which are located in the horn shell and have the same structure, the four ridges form a cross-shaped structure, two ridges located on the same straight line are a pair, two feeder lines are configured in the waveguide section, and the waveguide section is provided with two feed lines. The two feeder lines respectively excite the pair of ridges at the same time, so that dual polarization is realized. The two pairs of ridges are excited at the same time to realize two polarization directions at the same time, and low-frequency cut-off wavelength is effectively reduced and high-frequency cut-off wavelength is improved by means of smooth transition of the ridge waveguides, so that the bandwidth of the horn antenna is widened.

The utility model discloses a rapid error correction device for formation position keeping equipment. The rapid error correction device comprises positioning equipment and correction equipment, a prism in the positioning equipment is vertically arranged right below a direction finding antenna of the onboard formation position maintaining equipment, and a total station is placed at a position where the prism can be observed through a tripod; the positioning equipment measures the coordinates of the prism through the total station and positions the placement position of the horn antenna of the external field detector; and an external field detector in the correction equipment establishes connection with the onboard formation position keeping equipment through a horn antenna, measures an angle value and an energy value of a signal sent by the onboard equipment through the horn antenna, and transmits the angle value and the energy value to the airplane, so that error correction is implemented by the airplane. According to the technical scheme provided by the utility model, the problems that an airplane needs to be dragged twice and is accurately placed at a specific position, the time consumption is too long, the efficiency is low, manual errors are easily generated and the like in actual implementation in an existing mode for carrying out error calibration on the formation position keeping equipment are solved.

The invention discloses a horn antenna device with a reconfigurable wave beam and a using method thereof, and belongs to the technical field of antennae, and the horn antenna device comprises a wave same module which is relatively and fixedly arranged at the tail end of the horn antenna device; the three-axis telescopic framework is connected to the front end of the wave-same module, and the three-axis telescopic framework is at least composed of a transverse electric control telescopic component, a longitudinal electric control telescopic component and a depth direction electric control telescopic component and is used for changing the aperture and the depth size of the horn antenna; the distance feedback device is arranged at the oral surface position of the three-axis telescopic framework and is used for detecting in real time and feeding back the actual oral surface size to the control extension set; and the control extension set is electrically connected with the transverse electric control telescopic component, the longitudinal electric control telescopic component, the depth direction electric control telescopic component and the distance feedback device. The wave beam reconfigurable horn antenna device is simple and small in structure and high in structural strength, can expand various frequency bands and gains, and has high development and use potential.

The invention discloses a microwave electric field detection method based on three-light-excited Rydberg atom eight-wave mixing, and the method comprises the steps: building a microwave electric field detection device based on three-light-excited Rydberg atom eight-wave mixing, enabling a transmission path of decoration light Kd and a transmission path of coupling light Kc to reversely coincide with a transmission path of detection light KP in an atomic gas chamber, and enabling the transmission path of the coupling light Kc to be a transmission path of the detection light KP; a local oscillation microwave electric field KL is emitted to the atomic gas chamber from one side of the atomic gas chamber through the horn antenna; the horn antenna passively receives a signal microwave electric field KS in a free space and loads the signal microwave electric field KS to the atomic gas chamber; by observing the beat frequency electric signal output by the photoelectric detector, it is confirmed that the horn antenna receives the signal microwave electric field KS. Through a three-light excitation Rydberg atom scheme and an eight-wave mixing technology, the frequency resolution and sensitivity of electric field detection are remarkably improved, and a brand new technical path is provided for high-precision microwave electric field detection.

The application discloses a waveguide type Ka-band horn antenna, which comprises a straight waveguide section, a feeding section, a rear feeding cover and an antenna electric connector; the inside of the straight waveguide section is a rectangular waveguide cavity without a spine structure, and a local slot is formed in the matching surface of the feeding section; a feeding structure is designed in the inside of the feeding section, and the feeding structure is a multilayer step with a local protrusion on the matching surface of the straight waveguide section; the straight waveguide section and the feeding section are combined through fasteners, and the matching end surfaces of the straight waveguide section and the feeding section are both designed with blind hole positioning pin holes; the groove of the straight waveguide section is tightly matched with the protrusion structure of the feeding section; the rear feeding cover is locally protruded, and the protrusion structure is tightly matched with the cavity of the feeding section; the antenna electric connector is fixed through double holes, and the fastener passes through the through hole of the rear feeding cover and the antenna electric connector to simultaneously fix the two on the feeding section. The scheme provided by the application can effectively guarantee the design requirements of the antenna cavity, and has low overall manufacturing difficulty and good processability.

The application discloses an ultra-wideband circularly polarized wide-beam four-ridged horn antenna, which comprises four ridges arranged in a circle and a bottom-closed and top-open metal horn side wall, the ridges are connected with the upper surface of the bottom of the metal horn side wall, the lower surface of the bottom of the metal horn side wall is connected with a power division and phase shift network, the power division and phase shift network is connected with metal probes respectively arranged between two adjacent ridges of the four ridges, and the other two ridges are in contact with the cladding part of the metal probes; the working frequency band and the beam width are improved under the premise of small size by loading a stepped radiation structure on the upper part of the metal horn side wall, the beam width is regulated by adjusting the height and width of each layer of the stepped radiation structure, the beam width is further improved by introducing a circular slot on the metal horn side wall, and meanwhile, the metal probes which are bent by 90 degrees are arranged in the probe baffle, the side-feeding form of the four-ridged horn antenna is changed into bottom-feeding, and the occupation of the lateral space can be reduced without changing the original performance of the antenna.