436 results about "Horn antenna" patented technology

The invention provides a terahertz horn antenna and a preparation method thereof, and relates to the technical field of mobile communication systems. The antenna layer is arranged to be the antenna layer with the horn antenna groove structure, and due to the advantages of the horn antenna, the terahertz horn antenna has the advantages of being simple in structure, convenient to control gain, excellent in frequency characteristic, small in loss and the like. Moreover, the antenna layer and the radio frequency layer provided by the invention are fixed through bonding of the radiation electrode and the metal film, so that a low-reflection interconnection channel is realized, THz waves can be limited in a bonding area, the problem of electromagnetic leakage caused by stacking of the antenna layer and the radio frequency layer is avoided, and the performance of the terahertz horn antenna is improved. According to the terahertz horn antenna, the antenna layer and the radio frequency layer both adopt the glass substrates, the glass substrates have the advantages of high mechanical strength, small dielectric loss and the like, and the glass substrates can bear higher temperature, so that the problems of warping and deformation of the substrates are reduced, and the preparation quality of the terahertz horn antenna can be improved.

The invention discloses a microwave electric field measurement method and device based on Rydberg atom Rabian resonance, and the key point of the technical scheme is that the microwave electric field measurement device comprises an alkali metal atom gas chamber, a static magnetic field generation device, detection light, coupling light, a dichroscope, a photoelectric detector, an arbitrary waveform generator (AWG) and a horn antenna; sinusoidal phase modulation is applied to the microwave, the modulation frequency is variable, the Labir frequency of the microwave to be measured is obtained through a Labir resonance curve by utilizing Labir resonance generated between the phase modulation microwave and the three-energy-level Rydberg atoms, finally the electric field intensity of the microwave to be measured can be obtained through a microwave electric field intensity traceability formula, and under the action of a static magnetic field, the electric field intensity of the microwave to be measured can be measured. And the degeneracy of the atomic hyperfine energy level is destroyed, so that the measurement result is more accurate, and the measurement frequency band is wider. Moreover, the method can achieve the self-calibration measurement of the microwave electric field, and enables the magnitude of the amplitude of the electric field to be directly traced to the international unit system (SI system).

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 discloses a multi-beam seamless switching demonstration verification system, and relates to the field of satellite-ground communication simulation. The system comprises at least two vector signal sources used for simulating and outputting pseudo satellite emission signals; the satellite-ground wireless channel simulator is used for receiving the pseudo-satellite emission signal, processing the pseudo-satellite emission signal according to the analog channel model parameters and outputting a simulation signal; the at least two horn antennas are used for simulating satellite earth coverage wave beams, receiving simulation signals and outputting the simulation signals in a directional wave beam form; the service terminal carries a transceiving common-caliber phased-array antenna and is used for adjusting arrival beam receiving gains in different directions and adjusting a transmitting beam direction angle and gains so as to transmit signals; the frequency spectrograph is used for observing the received signal; and the upper computer is used for outputting analog channel model parameters, and is also used for controlling angle pointing and beam pointing switching of the transceiving common-caliber phased-array antenna. Compared with the prior art, the phased-array antenna communication process among multiple orbits, multiple satellites and satellite-ground coverage areas can be simulated quickly, truly and accurately.

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 relates to a system and method for improving the transient bandwidth of a Rydberg atomic microwave sensor, and the system comprises two lasers which are respectively used for generating detection light and coupling light; the detection light and the coupling light pass through a half-wave plate and are reflected by a polarization splitting prism to obtain first vertical polarized light, and the light transmitted through the polarization splitting prism sequentially passes through a reflector and a half-wave plate to be adjusted into second vertical polarized light; the two paths of detection light and coupling light are respectively propagated in the two rubidium atom steam pools in an opposite and coincident manner; the detection light passing through the reference rubidium atom steam pool and the polarization splitting prism and the detection light passing through the rubidium atom steam pool filled with the buffer gas and the semi-transparent and semi-reflective mirror are received by the photoelectric detector; signal microwaves and local microwaves are radiated to the two rubidium atom steam pools through the power divider and the microwave horn antenna respectively, and after a microwave electric field is applied, the intensity of beat frequency signals generated by interference of the signal microwaves and the local microwaves is measured through the change of the light intensity of detection light near EIT resonance.

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 the technical field of reconfigurable communication antenna equipment, and particularly discloses a liquid crystal-based high-aperture efficiency low-profile reconfigurable folding transmission array antenna design. The invention aims to solve the problems of insufficient aperture efficiency and high profile height in the existing reconfigurable folding array. The invention designs a novel transmission unit, and the unit integrates upper and lower layers of radiation and receiving patches with a polarization selection function, and a strip line-based liquid crystal phase shifter for realizing phase compensation. In order to minimize the profile height, the main transmission array is composed of a novel transmission unit, the auxiliary reflection array adopts a polarization conversion unit, and the interaction between the main transmission array and the auxiliary reflection array is used for folding the transmission path of electromagnetic waves. Meanwhile, the microstrip patch antenna replaces a traditional horn antenna to serve as an array feed source, so that the overall profile is reduced. In order to improve the aperture efficiency, the liquid crystal phase shifter is elaborately optimized to meet the requirement of 2-bit phase quantization, so that the phase modulation precision and the accuracy of array plane phase distribution are improved. Compared with a traditional space feed antenna and a folding array, the overall outline of the design is reduced by 2 / 3, meanwhile, the aperture efficiency is remarkably improved, and excellent two-dimensional beam scanning performance is kept.

The invention discloses an antenna far field test system and method based on weather radar base data, and relates to the technical field of weather radar test. The transmitting antenna is mounted on the first antenna turntable and rotates along azimuth, pitching and polarization axes; an antenna to be tested and a standard horn antenna are installed on a second antenna rotary table through a radar receiver, the aperture faces of the antenna to be tested and the standard horn antenna form an included angle of 180 degrees, mechanical axes are coaxial, and the antenna to be tested and the standard horn antenna rotate along azimuth and pitch axes. The data processing device is connected with the radar receiver. The testing process is simplified, and the equipment cost and the maintenance cost are remarkably reduced. The test time is shortened, and the test precision of gain, beam width, sidelobe level and the like of the to-be-tested antenna is improved. The whole system has wider adaptability in practical application and is not limited by specific climate conditions. The test process is accelerated, and errors caused by human factors are reduced. The method has the advantages of simplicity in operation, high automation degree, high adaptability and the like, and the measurement precision and the test efficiency of antenna performance parameters are remarkably improved.

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 shaped horn antenna which can be applied to the technical field of astronomical exploration and the technical field of satellite communication. The antenna comprises a first light wall structure, the first light wall structure comprises a first light wall output end, the inner wall of the first light wall structure comprises a dielectric block, the dielectric block comprises a supporting structure, a curve structure and a linear structure, the curve structure is parallel to the first light wall structure, and the dielectric block is rotationally symmetrical about the axis of the horn antenna; the second light wall structure comprises a second light wall input end and a second light wall output end, and the second light wall input end is connected to the first light wall output end; the third light wall structure comprises a third light wall input end, the third light wall input end is connected to the second light wall output end, and the third light wall input radius of the third light wall structure input end is different from the second light wall output radius of the second light wall output end, so that a stepped structure is achieved.

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 a broadband 1-bit reconfigurable circularly-polarized reflective array antenna based on a multi-resonant structure. The broadband 1-bit reconfigurable circularly-polarized reflective array antenna comprises a reconfigurable circularly-polarized reflective functional layer, a circularly-polarized horn antenna and an acrylic support. The reconfigurable circular polarization reflection function layer is formed by periodically arranging M * N circular polarization reflection array antenna units with the same structure according to the interval of 0.4125 lambda 0. The circularly polarized reflective array antenna unit is composed of a radiation layer and a direct current bias layer, the radiation layer comprises a circuit pattern designed based on a multi-resonant structure, a PIN diode, a radiation dielectric layer and a reflection bottom plate, and the direct current bias structure comprises a direct current bias dielectric layer and a direct current bias circuit. 1-bit regulation and control of unit reflection phases can be realized by controlling the on-off states of the four PIN diodes, a + / -60-degree beam scanning function can be realized by adjusting the state of each circularly polarized reflective array antenna unit, and the circularly polarized reflective array antenna can be applied to wireless communication and satellite communication systems.

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.

A horn antenna for a millimeter wave comprises: a horn radiator including a radiation part having an opening formed therein to radiate a feed signal, and a multi-layer PCB coupling part coupled to lower and side portions of the radiation part to provide a feed signal; and a multi-layer PCB coupled to a lower portion of the multi-layer PCB coupling part to provide a feed signal, wherein a slot and a groove connected to the slot and extending in a direction parallel to the multi-layer PCB are formed in the multi-layer PCB coupling part, wherein a feed line vertically overlapping the slot and the groove is formed on a first layer substrate, which is the uppermost layer of the multi-layer PCB, wherein the opening extends in a direction parallel to the multi-layer PCB, and wherein a ‘¬’-shaped waveguide extending from the slot is formed in the horn radiator.

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.