CN108718004B - Single-reflection double-transmission three-beam included angle super-surface antenna - Google Patents
Single-reflection double-transmission three-beam included angle super-surface antenna Download PDFInfo
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- CN108718004B CN108718004B CN201810476145.7A CN201810476145A CN108718004B CN 108718004 B CN108718004 B CN 108718004B CN 201810476145 A CN201810476145 A CN 201810476145A CN 108718004 B CN108718004 B CN 108718004B
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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
- H01Q15/23—Combinations of reflecting surfaces with refracting or diffracting devices
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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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/18—Reflecting surfaces; Equivalent structures comprising plurality of mutually inclined plane surfaces, e.g. corner reflector
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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
- H01Q19/02—Details
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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
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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
- H01Q19/10—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 reflecting surfaces
- H01Q19/106—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 reflecting surfaces using two or more intersecting plane surfaces, e.g. corner reflector antennas
Abstract
The invention provides a single-reflection double-transmission super-surface antenna with three beam included angles, aiming at effectively combining a reflecting surface and a lens to realize directional radiation of three beams; the device comprises a V-shaped reflection super-surface structure and a feed source which are clamped between flat waveguides, wherein the tail ends of two arms of the reflection super-surface structure are respectively connected with a transmission super-surface structure to form an included angle super-surface structure; the reflection super-surface structure comprises a V-shaped substrate plate, wherein resonant rings are printed on the side surfaces of two arms of the substrate plate facing the feed source, and a metal bottom plate is printed on the other side surface of the substrate plate; the transmission super-surface structure comprises 4 mutually parallel rectangular substrate plates, wherein the substrate plate closest to the feed source is connected with the tail ends of two arms of the reflection super-surface structure, the distance between every two substrate plates is equal along the normal direction of the substrate plates, and the side surface of the substrate plate facing to the feed source is printed with a metal patch with a slit ring etched in the center.
Description
Technical Field
The invention belongs to the technical field of antennas, relates to a multi-beam antenna, and particularly relates to a single-reflection double-transmission three-beam included angle super-surface antenna which can be used in the fields of wireless communication, radars and the like.
Technical Field
The multi-beam antenna technology can cover a wide transmission area with high gain, the requirements in the fields of satellite communication, radar reconnaissance, electronic countermeasure, microwave transmission and the like are continuously expanded, and the multi-beam antenna technology becomes an important development direction of next-generation satellite antennas, multi-target tracking radars and global electronic countermeasure systems.
The existing research for realizing the high-directivity multi-beam antenna generally has three forms of an array type, a lens type and a reflection type. Due to the advantages of simple structure, mature processing technology, high gain and the like, the lens type and reflection type antennas are widely applied to the construction of the multi-beam antenna. For example, in 2015, chinese patent entitled "multi-beam planar patch lens antenna," entitled CN103050782B, discloses a planar patch lens antenna, which is composed of different units, wherein the units are formed by arranging patches on two dielectric plates, arranging a metal slot in the middle, realizing the focusing of electromagnetic waves by changing the parameters and the arrangement positions of the patches and the metal slot, and realizing good multi-beam radiation by multi-feed-source off-focus feeding. For another example, in 2016, a chinese patent entitled "an optimized design method for single aperture multi-beam antenna", having an authorization publication number of CN104103910B, discloses a single aperture multi-beam reflector antenna, which is fed in a form of a feed array to realize multi-beam radiation through a shaping design of the reflector.
Although the existing research realizes the multi-beam antenna, the multi-feed source parallel feed is utilized, the feed network of the antenna is complex, and the antenna only works in a half-space area. The super surface controls the electromagnetic wave by controlling the wave front phase, has simple structure and has wide application prospect in a wireless communication system. The reflecting surface and the lens based on the super-surface structure are simple in structure and easy to combine in design, and can effectively construct the full-domain multi-beam antenna under the excitation of a single feed source.
Disclosure of Invention
The invention aims to provide a single-reflection double-transmission three-beam included angle super-surface antenna aiming at the defects in the prior art, and the structure of the antenna is simplified and the three-beam radiation of the whole domain space is realized simultaneously by loading an included angle super-surface structure in a plane waveguide and combining a reflection super-surface unit and a transmission super-surface unit to compensate the phase of incident electromagnetic waves under the excitation of a single feed source.
In order to achieve the purpose, the invention adopts the technical scheme that:
a single-reflection double-transmission three-beam included angle super-surface antenna is characterized in that: the device comprises a parallel flat waveguide 1, a V-shaped reflection super-surface structure 2 and a feed source 3; the V-shaped reflection super-surface structure 2 is fixed between two metal plates of the parallel flat waveguide 1, and the tail ends of two arms of the V-shaped reflection super-surface structure 2 are respectively connected with a transmission super-surface structure 4 to form a V-shaped included angle super-surface structure; feed 3 fixes the contained angle within range that V font contained angle super surface structure formed, and the 3 ripples ports of this feed are located the outside that V font contained angle super surface structure aperture face, wherein:
the V-shaped reflection super-surface structure 2 comprises a V-shaped substrate plate 21, the surface of which is vertical to two metal plates of the parallel flat waveguide 1, wherein the side surfaces of two arms of the V-shaped substrate plate 21 facing the feed source 3 are respectively printed with an area array structure consisting of a plurality of periodically arranged resonance rings 22, and the other side surface is printed with a metal bottom plate 23;
the transmission super-surface structure 4 comprises a plurality of rectangular substrate plates 41 with the plate surfaces perpendicular to two metal plates of the parallel flat waveguide 1 and parallel to each other, the plate surface of one rectangular substrate plate connected with the tail ends of two arms of the V-shaped reflection super-surface structure 2 is parallel to the plate surface of the connected arm, a metal patch is printed on the side surface of the rectangular substrate plate 41 facing the feed source 3, and a plurality of periodically arranged slit rings 42 are etched on the metal patch;
the dimensions of the resonant ring 22 and the slit ring 42 are determined by the coordinate values of the positions of the resonant ring and the slit ring, and the coordinate values of the position of the feed source 3 and the incident angle of the electromagnetic wave.
In the single-reflection double-transmission three-beam included angle super-surface antenna, the plurality of parallel rectangular substrate plates 41 are connected with the tail ends of the two arms of the V-shaped reflection super-surface structure 2, and the distance between every two rectangular substrate plates is equal.
In the single-reflection double-transmission three-beam included angle super-surface antenna, the dimension between the inner plate surfaces of the two metal plates of the parallel flat waveguide 1 is equal to the dimension of the V-shaped substrate plate 21 and the rectangular substrate plate 41 perpendicular to the direction of the two metal plates of the parallel flat waveguide 1
In the single-reflection double-transmission three-beam included angle super-surface antenna, the phase center of the feed source 3 is located on the central axis of the V-shaped included angle super-surface structure.
In the single-reflection double-transmission three-beam included angle super-surface antenna, the resonant ring 22 adopts a rectangular metal ring structure, and the phase compensation phi of the resonant ring structure1By adjusting the outer diameter width dimension W of the metal ring1Outer diameter length L1＝2×W1And a ring width dimension D1Implemented, its phase compensation phi1The calculation formula of (2) is as follows:
wherein k is the wave number in free space, theta is the included angle of the V-shaped included angle super-surface structure,
is an arbitrary phase constant, and Δ ri is the distance difference from the phase center of the feed source to the centers of two adjacent resonant rings, and the calculation formula is as follows:
wherein xi and yi are the distances from the center of the ith resonant ring to the center of the phase of the feed source in the x and y directions respectively, and q is the distance between the centers of two adjacent resonant rings.
In the single-reflection double-transmission three-beam included angle super-surface antenna, the slot ring 42 adopts a rectangular slot ring structure, and the phase compensation phi thereof2By adjusting the length L of the outer diameter of the slit ring2Outer diameter width dimension W2And a ring width dimension D2Implemented, its phase compensation phi2The calculation formula of (2) is as follows:
where k is the wave number in free space, θ0Is the transmitted beam pointing to be achieved by the transmissive super-surface structure,
is an arbitrary phase constant, and Δ rj is the distance difference from the phase center of the feed source to the centers of two adjacent slit rings, and the calculation formula is as follows:
wherein, xj and yj are the distances from the center of the jth slit ring to the phase center of the feed source in the x and y directions respectively, and p is the distance between two adjacent slit rings.
The feed source 3 adopts a standard rectangular waveguide structure, the size of the feed source perpendicular to the directions of the two metal plates of the parallel flat waveguide 1 is equal to the size between the inner plate surfaces of the two metal plates, the phase center of the feed source 3 is positioned at the central position of a waveguide aperture surface, specific coordinates are determined by optimizing computer simulation experiment parameters, and the determined principle is as follows: the distance between the center position of the aperture plane of the feed source and the vertex of the V-shaped included angle super-surface structure is adjusted so as to meet the requirement that the electromagnetic waves radiated by the feed source just completely irradiate the V-shaped included angle super-surface structure and no energy is leaked.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the transmission super-surface unit and the reflection super-surface unit are effectively combined to form a V-shaped included angle super-surface structure, and high-directivity radiation of the three-beam antenna is realized under the excitation of a single feed source.
2. According to the invention, the metal patch with the slit ring etched in the center and loaded on the transmission super-surface unit and the rectangular metal resonance ring loaded on the reflection super-surface unit are independently designed, and the incident wave from the feed source is independently calibrated, so that the performance of independently adjustable three-wave beam pointing of a single wave beam is realized, and the applicability of the three-wave beam antenna is improved.
3. The invention adopts single feed source excitation, thereby avoiding the problem of electromagnetic compatibility caused by mutual coupling of multiple feed sources.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic view of a reflective super-surface structure of an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a metal resonant ring of a reflective super-surface structure according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a transmissive super-surface structure in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of a metal patch structure with a slit ring etched in the center of the transmissive super-surface structure according to an embodiment of the present invention;
FIG. 6 is a simulation diagram of S11 according to an embodiment of the present invention;
FIG. 7 is a diagram of electric field simulations of an embodiment of the present invention;
FIG. 8 is a two-dimensional gain simulation plot of an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Referring to fig. 1, the single-reflection double-transmission three-beam included angle super-surface antenna comprises a parallel flat waveguide 1, a V-shaped reflection super-surface structure 2 and a feed source 3; the V-shaped reflection super-surface structure 2 is fixed between two metal plates of the parallel slab waveguide 1, the tail ends of two arms of the V-shaped reflection super-surface structure 2 are respectively connected with a transmission super-surface structure 4 to form a V-shaped included angle super-surface structure, the size of the V-shaped reflection super-surface structure 2 and the size of the transmission super-surface structure 4 in the direction perpendicular to the two metal plates of the parallel slab waveguide 1 are equal to the size between the two metal plates of the parallel slab waveguide 1, and the size between the two metal plates is 12.8mm in the embodiment. The feed source 3 adopts a standard WR90 waveguide with the inner section width of 22.86mm, the height of 10.16mm and the single-mode transmission frequency range of 8.2GHz-12.4GHz, is fixed on an extension line of a connecting line of the vertex of the V-shaped included angle super-surface structure and the central point of the aperture surface and is positioned outside the aperture surface of the V-shaped included angle super-surface structure.
Referring to fig. 2, the V-shaped reflection super-surface structure 2 includes a V-shaped substrate 21 made of FR4 material with a relative dielectric constant of 4.4 and a loss of 0.02 and having a thickness of 1mm, a planar array structure composed of mx 2 periodically arranged resonance rings 22 is printed on a side surface of the substrate facing an included angle, and a metal bottom plate 23 is printed on the other side surface and made of a metal copper material. In the process of experimental verification, only taking M as 50 as limited by computer simulation conditions in the embodiment of the present invention.
Referring to fig. 3, the resonant ring 22 employs a rectangular metal ring structure, the phase of which is compensated1By adjusting the outer diameter width dimension W of the metal ring1Outer diameter length L1＝2×W1And a ring width dimension D1Implemented, its phase compensation phi1The calculation formula of (2) is as follows:
wherein k is the wave number in free space, theta is the included angle of the V-shaped included angle super-surface structure,
is an arbitrary phase constant, and Δ ri is the distance difference from the phase center of the feed source to the centers of two adjacent resonant rings, and the calculation formula is as follows:
wherein xi and yi are the distances from the center of the ith resonant ring to the center of the phase of the feed source in the x and y directions respectively, q is the distance between the centers of two adjacent resonant rings, in the embodiment, theta is 60 degrees, q is 3.2mm,
incident angle thetaiThe calculation formula of (2) is as follows:
according to the phase value and the incidence angle corresponding to each resonant ring calculated by the formula, the boundary between the x direction and the y direction is set to adopt a periodic boundary condition through simulation software, the z direction is an open boundary condition, and the outer diameter width W of the resonant ring is adjusted1And a ring width dimension D1The corresponding dimension can be determined by observing the S11 parameter phase values until the wave port S11 parameter phase values satisfy the calculated phase values corresponding to each cell.
Referring to fig. 4, the transmission super-surface structure 4 includes 4 rectangular substrate boards 41, FR4 material with a relative dielectric constant of 4.4 and a loss of 0 is adopted, the thickness is 1mm, the 4 substrate boards are arranged in parallel and at equal intervals along the normal direction of the substrate boards, the distance is 6mm, a metal patch is printed on one side surface of each rectangular substrate board, and a metal copper material is adopted, N × 2 slit rings 42 arranged periodically are etched on the metal patch, in the process of experimental verification, because of the limitation of computer simulation conditions, the embodiment of the invention only takes N as 42. The 4 rectangular substrate plates are shown in figure 1, wherein the rectangular substrate plate closest to the feed source is connected with the tail end of the arm of the V-shaped reflection super-surface structure 2, the other rectangular substrate plates are distributed towards the outer side of the included angle along the direction perpendicular to the substrate plates, 4 ports of one side, connected with the tail end of the arm of the V-shaped reflection super-surface structure 2, of the 4 rectangular substrate plates are located on the plane where the 4 normal lines are located, and one side, on which a slit ring is etched, faces the feed source.
Referring to fig. 5, the slit ring 42 adopts a rectangular slit ring structure, and its phase is compensated2By adjusting the length L of the outer diameter of the slit ring2Outer diameter width dimension W2And a ring width dimension D2Implemented, its phase compensation phi2The calculation formula of (2) is as follows:
where k is the wave number in free space, θ0Is the transmitted beam pointing to be achieved by the transmissive super-surface structure,
is an arbitrary phase constant, and Δ rj is the distance difference from the phase center of the feed source to the centers of two adjacent slit rings, and the calculation formula is as follows:
wherein xj and yj are the distances from the center of the jth slit ring to the phase center of the feed source in the x and y directions, respectively, and p is the distance between two adjacent slit rings0＝0°，p＝3.8mm，
Incident angle thetajThe calculation formula of (2) is as follows:
calculating the phase value and the incidence angle corresponding to each unit according to the formula, and adjusting the outer diameter width W of the slit ring by using simulation software and adopting a periodic boundary condition on the boundary between the x direction and the y direction and an open boundary condition on the z direction2Outer diameter length L2And a ring width dimension D2Observing S11 parameter phase value until wave port S11 parameter phase value satisfiesThe phase value corresponding to each unit is calculated, and the corresponding size can be determined.
The center of the feed source 3 is taken as a coordinate origin, the coordinates of the units on two sides of the V-shaped included angle super-surface structure are unchanged in the y-axis direction, and the coordinates of the unit in the negative x-axis direction and the coordinates of the unit in the positive x-axis direction are opposite numbers. The coordinate change interval of the x-axis of the super-surface structure on two sides along the direction of the central axis of the included angle is [0, 159.8] and [ -159.8, 0], taking the positive direction of the x-axis as an example:
the specific dimensions of the resonant ring 22 are set as follows:
the change interval of the coordinate x is x epsilon [79.2mm, 64.8mm ∈]The variation interval of y is y epsilon [219.6mm, 244.5mm]Has 10 resonance rings, the incidence angle thetai40.2 °, 40.76 °, 41.35 °, 41.92 °, 42.48 °, 43 °, 43.58 °, 44.12 °, 44.64 °, 45.16 °, respectively, and the outer diameter width dimension W of the resonating ring12.5mm, 2mm, 2.85mm, 2.69mm, 2.65mm, 2.59mm, 2.7mm, 2.15mm, 2.9mm, 2.73mm, respectively, and a ring width dimension D10.15mm, 0.15mm, 0.35mm, 0.25mm, 0.3mm, 0.2mm, 0.5mm, 0.15mm, 0.45mm, 0.4mm, respectively, the phase compensation achieved being 96.63 °, 154.8 °, -146.7 °, -87.95 °, -28.9 °, 30.4 °, 90.02 °, 149.88 °, -150.0 °, 89.64 °, respectively.
The change interval of the coordinate x is x ∈ [63.2mm, 48.8mm ]]The variation interval of y is y ∈ [247.3mm, 272.3mm]Has 10 resonance rings, the incidence angle thetai45.66 deg., 46.16 deg., 46.65 deg., 47.13 deg., 47.6 deg., 48.06 deg., 48.52 deg., 48.97 deg., 49.4 deg., 49.84 deg., respectively, and the outer diameter width dimension W of the resonating ring12.67mm, 2.6mm, 2.47mm, 2.15mm, 2.79mm, 2.65mm, 2.6mm, 2.55mm, 2.47mm, 2mm, respectively, a ring width dimension D10.3mm, 0.25mm, 0.3mm, 0.1mm, 0.5mm, 0.45mm, 0.45mm, 0.4mm, 0.35mm, 0.2mm, respectively, the phase compensation achieved being-29.04 °, 31.79 °, 92.86 °, 154.15 °, 144.34 °, -82.62 °, -20.7 °, 41.42 °, 103.74 °, 166.25 °, respectively.
The change interval of the coordinate x is x epsilon [47.2mm, 32.8mm ∈]The variation interval of y is y ∈ [275.0mm, 300mm [ ]]Has 10 resonance rings, the incidence angle thetaiRespectively 50.26 °, 50.68 °, 51.09 °, 51.49 °, 51.88 °, 52.27 °, 52.65 °, 53.03 °, 53.39 °, 53.76 °, and the outer diameter width dimension W of the resonant ring12.7mm, 2.61mm, 2.55mm, 2.51mm, 2.45mm, 1.6mm, 2.73mm, 2.7mm, 2.63mm, 2.63mm, respectively, and a ring width dimension D10.25mm, 0.3mm, 0.2mm, 0.15mm, 0.3mm, 0.1mm, 0.1mm, 0.35mm, 0.25mm, 0.45mm, respectively, the phase compensation achieved being-131.06 °, -68.18 °, -5.13 °, 58.08 °, 121.47 °, -174.98 °, -111.27 °, -47.42 °, 16.59 °, 80.75 °, respectively.
The change interval of the coordinate x is x ∈ [31.2mm, 16.8mm ]]The variation interval of y is y ∈ [302.7mm, 327.7mm ∈]Has 10 resonance rings, the incidence angle thetai54.12 °, 54.46 °, 54.8 °, 55.15 °, 55.48 °, 55.8 °, 56.14 °, 56.45 °, 56.76 °, 57.06 °, respectively, and the outer diameter width dimension W of the resonating ring12.53mm, 0.4mm, 2.75mm, 2.69mm, 2.65mm, 2.57mm, 2.47mm, 3mm, 2.61mm, 2.7mm, respectively, and a ring width dimension D10.45mm, 0.1mm, 0.3mm, 0.35mm, 0.36mm, 0.1mm, 0.45mm, 0.3mm, 0.2mm, 0.45mm, respectively, the phase compensation achieved being 145.04 °, 150.52 °, -85.95 °, -21.24 °, 43.58 °, 108.54 °, 173.62 °, -121.18 °, -55.86 °, 9.56 °, respectively.
The change interval of the coordinate x is x ∈ [15.2mm, 0.8mm ]]The variation range of y is y ∈ [330.5mm, 355.4mm ∈ -]Has 10 resonance rings, the incidence angle thetai57.37 degrees, 57.66 degrees, 57.95 degrees, 58.24 degrees, 58.52 degrees, 58.80 degrees, 59.07 degrees, 59.34 degrees, 59.61 degrees, 59.87 degrees, and the width dimension W of the outer diameter of the resonance ring12.6mm, 2.5mm, 2.27mm, 2.73mm, 2.59mm, 2.6mm, 2.53mm, 2.49mm, 0.4mm, 2.63mm, respectively, and a ring width dimension D10.1mm, 0.3mm, 0.15mm, 0.3mm, 0.2mm, 0.44mm, 0.25mm, 0.45mm, 0.1mm, 0.15mm, respectively, the phase compensation achieved being 75.2 °, 140.75 °, -153.5 °, -87.64 °, -21.69 °, 44.36 °, 110.52 °, 176.76 °, -116.91 °, 50.48 °, respectively.
The specific dimensions of the slit ring 42 on the transmissive super-surface structure are set as follows:
the change interval of the coordinate x is x ∈ [80.95mm, 92.35mm ]]The variation interval of yIs y e [221.57mm, 201.82mm]Of 7 slit rings, incident thetajAre respectively 39.93 degrees, 39.22 degrees, 38.48 degrees, 37.74 degrees, 36.98 degrees, 36.2 degrees, 35.41 degrees, and the outer diameter width dimension W of the slit ring23.4mm, 3.5mm, 3.68mm, 3.38mm, 3.56mm, 3.58mm, 3.6mm, respectively, and an outer diameter length dimension L2Respectively 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, and a ring width dimension D20.59mm, 0.64mm, 0.84mm, 0.46mm, 0.54mm, 0.51mm, 0.49mm, respectively, and phase compensation of-152.02 °, 178.93 °, 150.32 °, 122.18 °, 94.5 °, 67.32 °, 40.64 °, respectively, is achieved.
The change interval of the coordinate x is x epsilon [94.25mm, 105.65mm]The variation interval of y is y ∈ [198.54mm, 178.79mm]Of 7 slit rings, incident thetaj34.6 degrees, 33.78 degrees, 32.94 degrees, 32.08 degrees, 31.21 degrees, 30.32 degrees, 29.42 degrees respectively, and the outer diameter width dimension W of the slit ring23.64mm, 3.7mm, 3.36mm, 3.36mm, 3.66mm, 3.54mm, 3.46mm, respectively, and an outer diameter length dimension L2Respectively 6.2mm, 6.2mm, 6.16mm, 6.16mm, 6.2mm, 6.2mm, 6.2mm, and a ring width dimension D20.45mm, 0.51mm, 0.22mm, 0.2mm, 0.97mm, 0.82mm, 0.7mm, respectively, the phase compensation achieved is 14.48 °, -11.14 °, -36.22 °, -60.73 °, -84.66 °, -107.98 °, -130.7 °, respectively.
The change interval of the coordinate x is x ∈ [107.55mm, 118.95mm ∈ [ ]]The variation interval of y is y ∈ [175.5mm, 155.75mm]Of 7 slit rings, incident thetajRespectively 28.5 degrees, 27.56 degrees, 26.61 degrees, 25.64 degrees, 24.65 degrees, 23.65 degrees, 22.63 degrees, and the outer diameter width dimension W of the slit ring23.6mm, 3.62mm, 3.59mm, 3.56mm, 3.6mm, 3.6mm, 3.65mm, outer diameter length L2Respectively 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, and a ring width dimension D20.82mm, 0.76mm, 0.69mm, 0.61mm, 0.61mm, 0.56mm, 0.6mm, respectively, the phase compensation achieved being-152.78 °, -174.2 °, 165.02 °, 144.94 °, 125.57 °, 106.91 °, 88.994 °, respectively.
The change interval of the coordinate x is x ∈ [120.85mm, 130.35mm ∈ [ ]]The variation interval of y is y ∈ [152.46mm, 132.72mm]Of 7 slit rings, incidentθjRespectively 21.59 degrees, 20.5 degrees, 19.48 degrees, 18.41 degrees, 17.32 degrees, 16.22 degrees and 15.1 degrees, and the outer diameter width dimension W of the slit ring23.6mm, 3.65mm, 3.55mm, 3.69mm, 3.63mm, 3.38mm, 3.7mm, respectively, and an outer diameter length dimension L2Respectively 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.19mm, 6.2mm, and a ring width dimension D20.56mm, 0.6mm, 0.45mm, 0.56mm, 0.46mm, 0.23mm, 1.11mm, respectively, and the phase compensation achieved is 71.82 °, 55.43 °, 39.81 °, 25.01 °, 11.02 °, -2.14 °, 14.44 °, respectively.
The change interval of the coordinate x is x epsilon [132.25mm, 145.55mm]The variation interval of y is y ∈ [129.43mm, 109.68mm]Of 7 slit rings, incident thetajRespectively at 13.97 degrees, 12.83 degrees, 11.68 degrees, 10.53 degrees, 9.36 degrees, 8.18 degrees and 7 degrees, and the outer diameter width dimension W of the slit ring23.62mm, 3.66mm, 3.7mm, 3.5mm, 3.46mm, 3.54mm, 3.5mm, respectively, and an outer diameter length dimension L2Respectively 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, and a ring width dimension D20.41mm, 0.42mm, 0.44mm, 0.92mm, 0.85mm, 0.94mm, 0.93mm, respectively, the phase compensation achieved is-25.89 °, -36.46 °, -46.15 °, -54.93 °, -62.80 °, -69.75 °, -75.78 °, respectively.
The change interval of the coordinate x is x ∈ [147.45mm, 158.85mm ∈ [ ]]The variation interval of y is y ∈ [106.39mm, 86.65mm]Of 7 slit rings, incident thetajRespectively at 5.8 °, 4.62 °, 3.42 °, 2.22 °, 1.02 °, -0.186 °, -1.39 °, and the outer diameter width dimension W of the slit ring23.62mm, 3.59mm, 3.62mm, 3.52mm, 3.55mm, 3.6mm, 3.51mm, respectively, and an outer diameter length dimension L2Respectively 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, 6.2mm, and a ring width dimension D20.77mm, 0.73mm, 0.76mm, 0.81mm, 0.73mm, 0.47mm, 0.48mm, respectively, the phase compensation achieved is-80.87 °, -85.01 °, -88.21 °, -90.45 °, -91.74 °, -92.07 °, -91.45 °, respectively.
The technical effects of the present invention will be further explained by simulation experiments.
Simulation conditions and contents.
1.1 simulation Condition
The above embodiment was performed using commercial simulation software CST Microwave Studio.
1.2 simulation content:
simulation 1, simulation of S11 parameters of 8.2 GHz-12.0 GHz in the specific embodiment, the result is shown in FIG. 6
and (5) analyzing a simulation result.
Referring to fig. 6, the three-beam included angle super-surface antenna of the embodiment of the invention has an S11 curve in a frequency region of 8.2GHz to 12.0GHz, simulation results show that in an X-band range, except for an S11 in a frequency band range of 10.2 GHz to 10.4GHz, the S11 is-9.5 dB to 10dB, and S11 in other frequency bands is lower than-10 dB, so that the matching is good in the frequency band range.
Referring to fig. 7, a near-field electric field diagram of the three-beam included angle super-surface antenna in the embodiment of the present invention at a frequency of 10GHz shows that three significant plane waves are generated after spherical waves emitted from a feed source pass through a transmission super-surface structure and a reflection super-surface structure.
Referring to fig. 8, a simulation result of a two-dimensional radiation gain simulation diagram at 10GHz according to the embodiment of the present invention shows that the radiation direction of the beam loaded with the super-surface unit is consistent with the theoretical design result, significant beams are formed in the orientations of Theta 180 °, Theta 60 °, and Theta 300 °, while side lobes in other orientations are effectively depressed, the beam calibration effect is significant, and the gain in the maximum radiation direction is 9 dBi.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the innovative concept of the present invention, but these changes are all within the scope of the present invention.
Claims (7)
1. A single-reflection double-transmission three-beam included angle super-surface antenna is characterized in that: the device comprises a parallel flat waveguide (1), a V-shaped reflection super-surface structure (2) and a feed source (3); the V-shaped reflection super-surface structure (2) is fixed between two metal plates of the parallel flat waveguide (1), and the tail ends of two arms of the V-shaped reflection super-surface structure (2) are respectively connected with a transmission super-surface structure (4) to form a V-shaped included angle super-surface structure; feed source (3) are fixed the contained angle within range that V font contained angle super surface structure formed, and this feed source (3) ripples port is located the outside that V font contained angle super surface structure aperture face, wherein:
the V-shaped reflection super-surface structure (2) comprises a V-shaped substrate plate (21) with a plate surface perpendicular to two metal plates of the parallel flat waveguide (1), wherein the side surfaces of two arms of the V-shaped substrate plate (21) facing the feed source (3) are respectively printed with an area array structure consisting of a plurality of periodically arranged resonance rings (22), and the other side surface is printed with a metal bottom plate (23);
the transmission super-surface structure (4) comprises a plurality of rectangular substrate plates (41) with the plate surfaces perpendicular to two metal plates of the parallel flat waveguide (1) and parallel to each other, the plate surface of one rectangular substrate plate connected with the tail ends of two arms of the V-shaped reflection super-surface structure (2) is parallel to the plate surface of the connected arm, a metal patch is printed on the side surface of the rectangular substrate plate (41) facing the feed source (3), and a plurality of periodically arranged slit rings (42) are etched on the metal patch;
the sizes of the resonant ring (22) and the slit ring (42) are determined by the coordinate value of the position of each resonant ring, the coordinate value of the position of the feed source (3) and the incident angle of the electromagnetic wave.
2. The single-reflection double-transmission three-beam included angle super-surface antenna according to claim 1, wherein: the rectangular substrate plates (41) which are parallel to each other are positioned on the side closest to the feed source and connected with the tail ends of two arms of the V-shaped reflection super-surface structure (2), and the distances between every two rectangular substrate plates are equal.
3. The single-reflection double-transmission three-beam included angle super-surface antenna according to claim 1, wherein: the distance between the inner plate surfaces of the two metal plates of the parallel flat waveguide (1) is equal to the height of the V-shaped substrate plate (21) and the rectangular substrate plate (41).
4. The single-reflection double-transmission three-beam included angle super-surface antenna according to claim 1, wherein: and the phase center of the feed source (3) is positioned on the central axis of the V-shaped included angle super-surface structure.
5. The single-reflection double-transmission three-beam included angle super-surface antenna according to claim 1, wherein: the resonance ring (22) adopts a rectangular metal ring structure, and the phase compensation phi of the resonance ring is1By adjusting the outer diameter width dimension W of the metal ring1Outer diameter length L1＝2×W1And a ring width dimension D1Implemented, its phase compensation phi1The calculation formula of (2) is as follows:
wherein k is the wave number in free space, theta is the included angle of the V-shaped included angle super-surface structure,
is an arbitrary phase constant, and Δ ri is the distance difference from the phase center of the feed source to the centers of two adjacent resonant rings, and the calculation formula is as follows:
wherein xi and yi are the distances from the center of the ith resonant ring to the center of the phase of the feed source in the x and y directions respectively, and q is the distance between the centers of two adjacent resonant rings.
6. A single lens reflex according to claim 1Penetrate super surface antenna of two transmission three wave beam contained angles, its characterized in that: the slit ring (42) adopts a rectangular slit ring structure, and the phase compensation phi of the slit ring structure2By adjusting the length L of the outer diameter of the slit ring2Outer diameter width dimension W2And a ring width dimension D2Implemented, its phase compensation phi2The calculation formula of (2) is as follows:
wherein k is the wave number in free space, theta is the included angle of the V-shaped included angle super-surface structure, and theta0Is the transmitted beam pointing to be achieved by the transmissive super-surface structure,
is an arbitrary phase constant, and Δ rj is the distance difference from the phase center of the feed source to the centers of two adjacent slit rings, and the calculation formula is as follows:
wherein, xj and yj are the distances from the center of the jth slit ring to the phase center of the feed source in the x and y directions respectively, and p is the distance between two adjacent slit rings.
7. The single-reflection double-transmission three-beam included angle super-surface antenna according to claim 1, wherein: the feed source (3) adopts a standard rectangular waveguide structure, the height dimension of the outer section of the feed source is equal to the distance dimension between the inner plate surfaces of the two metal plates, the phase center of the feed source (3) is positioned at the central position of the waveguide aperture surface, specific coordinates are determined by optimizing computer simulation experiment parameters, and the determined principle is as follows: the distance between the center position of the aperture plane of the feed source and the vertex of the V-shaped included angle super-surface structure is adjusted so as to meet the requirement that the electromagnetic waves radiated by the feed source just completely irradiate the V-shaped included angle super-surface structure and no energy is leaked.
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| "Broadband and Broad-Angle Multilayer Polarizer Based on Hybrid Optimization Algorithm for Low-Cost Ka-Band Applications ";Darwin Blanco;《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 》;20180209;全文 * |
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