CN114374093A - Horn antenna - Google Patents
Horn antenna Download PDFInfo
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- CN114374093A CN114374093A CN202210003141.3A CN202210003141A CN114374093A CN 114374093 A CN114374093 A CN 114374093A CN 202210003141 A CN202210003141 A CN 202210003141A CN 114374093 A CN114374093 A CN 114374093A
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- 239000002184 metal Substances 0.000 claims abstract description 184
- 229910052751 metal Inorganic materials 0.000 claims abstract description 184
- 239000000758 substrate Substances 0.000 claims abstract description 91
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000005530 etching Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
- H01Q19/08—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens for modifying the radiation pattern of a radiating horn in which it is located
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention provides a horn antenna, comprising: the antenna comprises an antenna feed source, a first waveguide, a waveguide converter, a second waveguide, a horn body and a super-surface lens; the antenna feed source is connected with a first waveguide, and the first waveguide is connected with a first end of the waveguide converter; one end of the second waveguide is connected with the second end of the waveguide converter, the other end of the second waveguide is connected with the horn body, and the super-surface lens is arranged at one end of the horn body, which is far away from the second waveguide; the super-surface lens comprises a first substrate, a second substrate and a metal patch, wherein a first metal grid is arranged on a first end face of the first substrate, a second metal grid is arranged on a first end face of the second substrate, the metal patch is formed on one of a second end face of the first substrate and a second end face of the second substrate, and the first metal grid and the second metal grid are arranged in an orthogonal mode. The horn antenna is low in manufacturing cost, and the super-surface lens is positioned right above the diameter surface of the horn mouth, so that the miniaturization, the light weight and the high gain of the horn antenna are realized.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a horn antenna.
Background
The horn antenna is particularly suitable for high frequency and high power systems because of its low loss and high power capacity. With the development of modern communication technology and the continuous innovation of microwave millimeter wave technology, the requirements of miniaturization, light weight and low cost are put forward for the horn antenna.
The main limitation to the directivity of the horn antenna is the phase inconsistency on the horn mouth surface, when the electromagnetic wave enters the interior of the horn and reaches the horn mouth surface, the wave surface of the electromagnetic wave is changed from a plane to a spherical surface, and the phases of the electromagnetic wave on the horn mouth surface are inconsistent. In order to reduce the phase inconsistency on the horn mouth surface, the method often adopted is to change the flare angle of the horn or the length of the horn or load a dielectric lens, and the dielectric lens is generally in a curved surface shape, so that the defects of large volume, complex structure and complex processing exist.
Disclosure of Invention
The invention provides a horn antenna, which is used for solving the problems of large size, complex structure, high manufacturing cost and poor gain of the conventional high-gain horn antenna.
The present invention provides a horn antenna, comprising: the antenna comprises an antenna feed source, a first waveguide, a waveguide converter, a second waveguide, a horn body and a super-surface lens;
the antenna feed is connected with the first waveguide, and the first waveguide is connected with the first end of the waveguide converter; one end of the second waveguide is connected with the second end of the waveguide converter, the other end of the second waveguide is connected with the horn body, and the super-surface lens is arranged at one end, away from the second waveguide, of the horn body;
the super-surface lens comprises a first substrate, a second substrate and a metal patch, wherein a first metal grid is arranged on a first end face of the first substrate, a second metal grid is arranged on a first end face of the second substrate, a second end face of the first substrate is attached to a second end face of the second substrate, the metal patch is formed on one of the second end face of the first substrate and the second end face of the second substrate, and the first metal grid and the second metal grid are arranged in an orthogonal mode.
According to the horn antenna provided by the invention, the super-surface lens comprises a plurality of super-surface unit structures, the super-surface unit structures are arranged in a rectangular array to form the super-surface lens, and the thickness of each super-surface unit structure is 0.1 lambda;
and the lambda is the wavelength corresponding to the central frequency point of the working frequency band of the horn antenna.
According to the horn antenna provided by the invention, the length of the super-surface unit structure is less than or equal to 0.5 lambda, and the width of the super-surface unit structure is less than or equal to 0.5 lambda.
According to the horn antenna provided by the invention, the first metal grid and the second metal grid have the same structure.
According to the horn antenna provided by the invention, the first metal gate comprises a first metal layer and a second metal layer, the width of the first metal layer is smaller than that of the second metal layer, and the second metal layer is arranged between two adjacent first metal layers.
According to the horn antenna provided by the invention, the first substrate and the second substrate are PCB boards.
According to the horn antenna provided by the invention, the dielectric constants of the first substrate and the second substrate are 2.45-2.85.
According to the horn antenna provided by the invention, the horn antenna further comprises a support, the support is arranged along the circumferential direction of the horn body, and the outer wall of the super-surface lens is attached to the inner wall of the support.
According to the horn antenna provided by the invention, the second waveguide is a circular waveguide, and the horn body is conical.
According to the horn antenna provided by the invention, the metal patches comprise a first metal patch, a second metal patch, a third metal patch and a fourth metal patch, and the first metal patch, the second metal patch, the third metal patch and the fourth metal patch are sequentially and orthogonally arranged.
According to the horn antenna, the super-surface lens is of an ultrathin plane structure and is formed by pressing two substrates, the manufacturing process is simple, the manufacturing cost is low, the horn antenna is light and convenient to assemble, the super-surface lens is located right above the diameter surface of the horn mouth, spherical-like waves in the horn are corrected into plane waves, and therefore the horn antenna can achieve high-gain radiation performance under a small size, and the horn antenna is beneficial to achieving miniaturization, light weight and high gain.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a horn antenna provided in the present invention;
FIG. 2 is a schematic structural diagram of a super-surface lens provided by the present invention;
FIG. 3 is a schematic structural diagram of a super-surface unit structure provided by the present invention;
FIG. 4 is a schematic structural diagram of a first metal layer and a second metal layer provided by the present invention;
FIG. 5 is a graph of transmittance of a super-surface unit structure provided by the present invention;
FIG. 6 is a four-phase plot of a super-surface unit structure provided by the present invention;
FIG. 7 is a graph of the reflection coefficient of the horn antenna of the present invention as a function of frequency;
FIG. 8 is a graph of the gain of the feedhorn of the present invention as a function of frequency;
reference numerals:
1: antenna feed 2: a first waveguide;
3: a waveguide converter; 4: a second waveguide;
5: a horn body; 6: a support;
7: a super-surface lens; 8: a first substrate;
9: a first metal gate; 10: a second substrate;
11: a second metal gate; 12: a metal patch;
13, a first metal layer; 14: a second metal layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A horn antenna according to an embodiment of the present invention will be described with reference to fig. 1 to 8.
As shown in fig. 1 and 2, the horn antenna provided by the embodiment of the present invention includes an antenna feed 1, a first waveguide 2, a waveguide converter 3, a second waveguide 4, a horn body 5, and a super-surface lens 7.
The first waveguide 2 is connected with a first end of a waveguide converter 3; one end of the second waveguide 4 is connected with the second end of the waveguide converter 3, the other end of the second waveguide 4 is connected with the horn body 5, and the super-surface lens 7 is arranged at one end of the horn body 5 departing from the second waveguide 4.
The super-surface lens 7 comprises a first substrate 8, a second substrate 10 and a metal patch 12, wherein a first metal grid 9 is arranged on a first end face of the first substrate 8, a second metal grid 11 is arranged on a first end face of the second substrate 10, a second end face of the first substrate 8 is attached to a second end face of the second substrate 10, the metal patch 12 is formed on one of the second end face of the first substrate 8 and the second end face of the second substrate 10, and the first metal grid 9 and the second metal grid 11 are arranged in an orthogonal mode.
Specifically, the first waveguide 2 is rectangular, the horn body 5 is pyramid or cone, and the like, the specific shape of the horn body 5 is set according to actual requirements, the shape of the second waveguide 4 is set according to the shape of the horn body 5, and when the horn body 5 is cone, the second waveguide 4 is circular waveguide, the internal structure of the waveguide converter 3 is in a form that the rectangular aperture surface gradually changes towards the circular aperture surface, one end of the rectangular aperture surface of the waveguide converter 3 is defined as a first end, and one end of the circular aperture surface of the waveguide converter 3 is defined as a second end. The first end of the waveguide converter 3 is connected with the first waveguide 2, the second end of the waveguide converter 3 is connected with the second waveguide 4, and transition connection from the rectangular waveguide to the conical horn body is achieved through the waveguide converter 3 and the circular waveguide.
The feed joint is installed on the upper portion of first waveguide 2, and the feed joint is as feedway 1 of horn antenna, and assorted standard rectangular waveguide can be selected according to the operating frequency channel of horn antenna to first waveguide 2, and the size of second waveguide 4 sets up according to horn antenna's operating frequency, and the size of loudspeaker body 5 sets up according to horn antenna's gain demand.
The sizes of the first substrate 8 and the second substrate 10 are matched with the size of the horn mouth diameter surface of the horn body 5, two opposite end surfaces of the first substrate 8 are defined as a first end surface of the first substrate 8 and a second end surface of the first substrate 8 respectively, and two opposite end surfaces of the second substrate 10 are defined as a first end surface of the second substrate 10 and a second end surface of the second substrate 10 respectively.
The first substrate 8 has a first metal grid 9 disposed on a first end surface thereof, and the first metal grid 9 is composed of a plurality of metal layers disposed at intervals, and the metal layers may be copper layers. The second substrate 10 has a second metal grid 11 on a first end surface thereof, and the second metal grid 11 is also composed of a plurality of metal layers arranged at intervals, and the metal layers may be copper layers. The first and second metal gates 9 and 11 may be formed on the first end surface of the first substrate 8 and the first end surface of the second substrate 10, respectively, by an etching process.
The metal patches 12 are also metal layers, the metal patches 12 may be copper layers, and a plurality of metal patches 12 are formed on the second end surface of the first substrate 8 through an etching process, or a plurality of metal patches 12 are formed on the second end surface of the second substrate 10 through an etching process. Aligning the second end face of the first substrate 8 with the second end face of the second substrate 10 to ensure that the first metal grids 9 and the second metal grids 11 are orthogonally arranged, and pressing the first substrate 8 and the second substrate 10 together through a pressing process to form the super-surface lens 7.
In the embodiment of the invention, the super-surface lens 7 is of an ultrathin planar structure, the super-surface lens 7 is formed by pressing two substrates, the manufacturing process is simple, the manufacturing cost is low, the super-surface lens is light and convenient to assemble, and the super-surface lens 7 is positioned right above the diameter surface of the horn mouth, so that the sphere-like wave in the horn is corrected into a planar wave, and therefore, the horn antenna can realize high-gain radiation performance under a smaller size, and the miniaturization, the light weight and the high gain of the horn antenna are favorably realized.
In an alternative embodiment, the super-surface lens 7 includes a plurality of super-surface unit structures, the super-surface unit structures are arranged in a rectangular array to form the super-surface lens 7, and the thickness of the super-surface unit structure is 0.1 λ; and λ is the wavelength corresponding to the central frequency point of the working frequency band of the horn antenna.
Specifically, the super-surface lens 7 is formed by arranging a plurality of super-surface unit structures according to a certain periodic sequence, for example, the super-surface unit structures are ultra-thin square structures, and the plurality of super-surface unit structures are arranged according to a rectangular array to form the super-surface lens 7.
As shown in fig. 3, the super surface unit structure includes an upper substrate, a lower substrate and a metal patch 12, the upper substrate and the lower substrate have the same structure, the upper substrate and the lower substrate have a square structure, and the upper substrate and the lower substrate have the same length, width and height dimensions. The upper substrate is here considered to be a part cut out of the first substrate 8, and the lower substrate is considered to be a part cut out of the second substrate 10.
The length of the super surface unit structure is less than or equal to 0.5 lambda, and the width of the super surface unit structure is less than or equal to 0.5 lambda.
For example, if the central frequency of the horn antenna is 30GHz, and the wavelength corresponding to the central frequency point of the horn antenna is 10mm, the thickness of the super-surface unit structure is 1 mm. The length of the super surface unit structure is less than or equal to 5mm, and the width of the super surface unit structure is less than or equal to 5 mm.
For example, the super-surface unit structure has a length of 4mm and a width of 4 mm. The upper substrate is a square body with the thickness of 4mm x 0.5mm, the lower substrate is a square body with the thickness of 4mm x 0.5mm, and one metal patch 12 is positioned at the joint surface of the upper substrate and the lower substrate.
When the super-surface lens 7 is manufactured, two substrates having the same thickness are used. For example, the super surface lens 7 is manufactured by using two substrates each having a thickness of 0.5mm and a thickness of 1mm for the super surface unit structure.
According to the rectangular array arrangement sequence of the super-surface unit structures, a plurality of first metal grids 9 of the super-surface unit structures are etched on one substrate with the thickness of 0.5mm, a plurality of second metal grids 11 of the super-surface unit structures are etched on the other substrate with the thickness of 0.5mm, a plurality of metal patches 12 of the super-surface unit structures are etched at the combined part of the two substrates, and finally the two substrates are pressed together through a pressing process, so that the super-surface lens 7 is formed, and the manufacturing is simple.
The super-surface lens 7 can correct sphere-like waves above the aperture surface of the horn antenna into plane waves, and the specific method is to calculate the phase of the central point of each array element at the position of the lower plane of the super-surface by using a ray tracing method, then calculate the compensation phase required by the corresponding array element point of the super-surface lens 7 according to the required plane waves, compensate the secondary phase error required by each array element by using a phase dispersion method according to the generalized Snell's law, and finally design the required super-surface lens 7 by using the super-surface unit structure.
Array element layout is carried out on the super-surface unit structure by utilizing a ray tracing method to control phase wavefront, so that conversion of incident waves inside the horn antenna from sphere-like waves to external plane waves is realized, and high-gain radiation performance is obtained.
In an alternative embodiment, the first metal grid 9 and the second metal grid 11 are identical in structure.
Specifically, the kind and arrangement of the metal layer included in the first metal gate 9 are the same as those of the metal layer included in the second metal gate 11. The kind and arrangement of the metal layer included in the first metal gate 9 are set according to actual requirements.
For example, the first metal gate 9 includes metal layers with one width dimension, and the metal layers with one width dimension are distributed at equal intervals on the first end face of the first substrate 8. Or the first metal gate 9 includes metal layers with two width dimensions, and the metal layers with two width dimensions are distributed at intervals on the first end face of the first substrate 8. Or the first metal gate 9 includes metal layers with three width dimensions, and the metal layers with three width dimensions are distributed at intervals on the first end face of the first substrate 8.
In an alternative embodiment, the first metal gate 9 includes a first metal layer 13 and a second metal layer 14, the width of the first metal layer 13 is smaller than the width of the second metal layer 14, and the second metal layer 14 is disposed between two adjacent first metal layers 13.
Specifically, the first metal gate 9 includes two metal layers with width sizes, which are respectively defined as a first metal layer 13 and a second metal layer 14, and thicknesses of the first metal layer 13 and the second metal layer 14 are set according to actual requirements, for example, the thicknesses of the first metal layer 13 and the second metal layer 14 may be 0.035 mm.
The arrangement of the first metal layer 13 and the two second metal layers 14 will be described by taking the case where the length and width dimensions of the super-surface unit structure are 4mm, respectively.
As shown in fig. 4, the width S1 of the first metal layer 13 is 0.425mm, the number of the first metal layers 13 is two, the width S2 of the second metal layer 14 is 1mm, and the number of the second metal layers 14 is two. The two first metal layers 13 and the two second metal layers 14 are symmetrically distributed along the length direction or the width direction of the super surface unit structure. The spacing g1 between the first metal layer 13 and the second metal layer 14 is 0.3mm, and the spacing g2 between the two second metal layers 14 is 0.55 mm.
The two first metal layers 13 and the two second metal layers 14 form a group of metal layer units, and the plurality of groups of metal layer units are sequentially arranged along the first end face of the first substrate 8 to form the first metal gate 9.
The second metal gate 11 also includes metal layers with two width dimensions, and the width dimensions and arrangement of the two metal layers are the same as those of the first metal gate 9, which are not described herein again.
In an alternative embodiment, the first substrate 8 and the second substrate 10 are PCB boards, and the dielectric constant of the first substrate 8 and the second substrate 10 is 2.45-2.85.
For example, the first substrate 8 and the second substrate 10 are both made of PCBs with dielectric constants of 2.65, the first metal grid 9, the second metal grid 11 and the metal patch 12 are formed on the two PCBs through an etching process, and then the two PCBs are pressed to form the super-surface lens 7.
As shown in fig. 1, in the embodiment of the present invention, the horn antenna further includes a bracket 6, the bracket 6 is disposed along a circumferential direction of the horn body 5, and an outer wall of the super-surface lens 7 is attached to an inner wall of the bracket 6.
Specifically, the shape of the bracket 6 is matched with the size of the aperture surface of the horn body 5, the horn body 5 is in a pyramid shape, the bracket 6 is in a square structure, the horn body 5 is in a cone shape, and the bracket 6 is in a circular structure.
As shown in fig. 3, in an alternative embodiment, the metal patches 12 include a first metal patch, a second metal patch, a third metal patch, and a fourth metal patch, and the first metal patch, the second metal patch, the third metal patch, and the fourth metal patch are sequentially orthogonally disposed.
Specifically, metal patch 12 is the cross structure, and metal patch 12 is including being first metal patch, second metal patch, third metal patch and the fourth metal patch that the quadrature set up in proper order, and the length of first metal patch and third metal patch equals, and the length of second metal patch and fourth metal patch equals. The width and the thickness of the first metal patch, the second metal patch, the third metal patch and the fourth metal patch are set according to actual requirements. For example, the widths of the first metal patch, the second metal patch, the third metal patch and the fourth metal patch are all 0.2mm, and the thicknesses of the first metal patch, the second metal patch, the third metal patch and the fourth metal patch are all 0.035 mm.
The length of the super-surface unit structure is 4mm, the width is 4mm, and the thickness is 1 mm. The first metal patch and the third metal patch are located on one diagonal line of the super-surface unit structure, and the second metal patch and the fourth metal patch are located on the other diagonal line of the super-surface unit structure. The length of first metal paster and third metal paster is 4mm, and the length of second metal paster and fourth metal paster is 3 mm.
The cross-shaped structure of the metal patch 12 causes the super-surface unit structure to form four phase units, which are defined as a first unit, a second unit, a third unit, and a fourth unit, respectively.
FIG. 5 is a graph of transmittance of a super-surface unit structure in transmission of electromagnetic waves. The horizontal axis represents frequency range and the vertical axis represents transmittance. It can be seen from fig. 5 that the transmittance of the four phase units is greater than 0.9 and close to 1 in the range of 27GHz to 31GHz, which indicates that the reflectivity of the super-surface unit structure is very low and the electromagnetic wave is almost transmitted without reflection.
Fig. 6 is a transmission phase curve diagram of an incident wave after passing through the super-surface unit structure, and it can be seen from fig. 6 that the super-surface unit structure can provide four compensation phases with high-efficiency transmission coefficients and 90-degree intervals in a phase range of 0-360 degrees within a range of 27 GHz-31 GHz, and provide the compensation phases for the design of the super-surface lens 7.
The horn body 5 is described below as an example of a conical shape, and the parameters of the horn antenna are as follows. The central frequency of the horn antenna is 30GHz, the axial length of the horn body 5 is 45mm, the diameter of the caliber surface of the horn is 120mm, and the horn opening angle is 102 degrees. The thickness of the super-surface lens 7 is 1mm, the diameter of the super-surface lens 7 is 120mm, and the super-surface lens 7 is assembled at a position 10mm away from the bell mouth diameter surface.
Fig. 7 and 8 are graphs showing the reflection coefficient and gain of the horn antenna in the 25 GHz-34 GHz range with frequency. Through the comparative analysis of the simulation results of the empty horn antenna which is not loaded with the super-surface lens 7 and the horn antenna which is loaded with the super-surface lens 7, it can be seen that the horn antenna loaded with the super-surface lens 7 greatly improves the gain of the antenna on the premise of slightly influencing the reflection coefficient due to the high transmittance of the super-surface lens 7. In the range of 25GHz to 34GHz, as can be seen from FIG. 7, the reflection coefficient of the horn antenna loaded with the super-surface lens 7 is below-10 dB, and as can be seen from FIG. 8, the peak gain of the horn antenna loaded with the super-surface lens 7 is 28.9 dBi.
The miniaturization, the light weight and the high-gain radiation performance of the horn antenna are realized by loading the super-surface lens 7 above the aperture surface of the wide-opening-angle conical horn.
The metal patch 12 can also adopt an open-loop structure or a metal rod structure, so long as the requirement that the super-surface unit structure realizes 0-360-degree uniform phase distribution on the premise of high transmittance is met, the super-surface lens 7 can be manufactured and applied to the horn antenna, and the miniaturization, light weight and high-gain radiation performance of the horn antenna are realized.
The loudspeaker body 5 can be pyramid shape, conical shape or other shapes, and concrete restriction is not done to loudspeaker body 5's shape, and super surface lens 7 can load in loudspeaker body 5's inside, and super surface lens 7 also can load on loudspeaker mouth footpath face of loudspeaker body 5, as long as satisfy can be with class spherical wave conversion plane wave can.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A horn antenna, comprising: the antenna comprises an antenna feed source, a first waveguide, a waveguide converter, a second waveguide, a horn body and a super-surface lens;
the antenna feed is connected with the first waveguide, and the first waveguide is connected with the first end of the waveguide converter; one end of the second waveguide is connected with the second end of the waveguide converter, the other end of the second waveguide is connected with the horn body, and the super-surface lens is arranged at one end, away from the second waveguide, of the horn body;
the super-surface lens comprises a first substrate, a second substrate and a metal patch, wherein a first metal grid is arranged on a first end face of the first substrate, a second metal grid is arranged on a first end face of the second substrate, a second end face of the first substrate is attached to a second end face of the second substrate, the metal patch is formed on one of the second end face of the first substrate and the second end face of the second substrate, and the first metal grid and the second metal grid are arranged in an orthogonal mode.
2. The horn antenna of claim 1, wherein the super-surface lens comprises a plurality of super-surface unit structures, the super-surface unit structures are arranged in a rectangular array to form the super-surface lens, and the thickness of the super-surface unit structure is 0.1 λ;
and the lambda is the wavelength corresponding to the central frequency point of the working frequency band of the horn antenna.
3. The horn antenna of claim 2, wherein the super-surface unit structure has a length of 0.5 λ or less and a width of 0.5 λ or less.
4. The horn antenna of claim 1, wherein the first and second metal grids are identical in structure.
5. The horn antenna of claim 4, wherein the first metal grid comprises a first metal layer and a second metal layer, the width of the first metal layer is smaller than that of the second metal layer, and the second metal layer is disposed between two adjacent first metal layers.
6. The horn antenna of claim 1, wherein the first and second substrates are PCB boards.
7. The horn antenna of claim 1, wherein the first substrate and the second substrate have a dielectric constant of 2.45-2.85.
8. The horn antenna of claim 1, further comprising a support disposed along a circumference of the horn body second waveguide, wherein an outer wall of the super-surface lens is attached to an inner wall of the support.
9. The horn antenna of claim 1, wherein the second waveguide is a circular waveguide and the horn body is conical.
10. The horn antenna of claim 1, wherein the metal patches comprise a first metal patch, a second metal patch, a third metal patch and a fourth metal patch, and the first metal patch, the second metal patch, the third metal patch and the fourth metal patch are sequentially orthogonally arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210003141.3A CN114374093B (en) | 2022-01-04 | 2022-01-04 | horn antenna |
Applications Claiming Priority (1)
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| CN110380230A (en) * | 2019-07-25 | 2019-10-25 | 东南大学 | A kind of super-wide band high-gain lens antenna and its design method based on three-dimensional impedance matching lens |
| KR102332501B1 (en) * | 2020-10-14 | 2021-12-01 | 국방과학연구소 | Circularly polarized window and antenna includnig the same |
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| CN114374093B (en) | 2023-11-24 |
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