[go: up one dir, main page]

WO2013013460A1 - Antenne à micro-ondes à alimentation latérale - Google Patents

Antenne à micro-ondes à alimentation latérale Download PDF

Info

Publication number
WO2013013460A1
WO2013013460A1 PCT/CN2011/082818 CN2011082818W WO2013013460A1 WO 2013013460 A1 WO2013013460 A1 WO 2013013460A1 CN 2011082818 W CN2011082818 W CN 2011082818W WO 2013013460 A1 WO2013013460 A1 WO 2013013460A1
Authority
WO
WIPO (PCT)
Prior art keywords
metamaterial
refractive index
metamaterial sheet
core
center
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2011/082818
Other languages
English (en)
Chinese (zh)
Inventor
刘若鹏
季春霖
岳玉涛
杨青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuang-Chi Institute of Advanced Technology
Kuang Chi Innovative Technology Ltd
Original Assignee
Kuang-Chi Institute of Advanced Technology
Kuang Chi Innovative Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN 201110210316 external-priority patent/CN102480023B/zh
Priority claimed from CN201110210315.5A external-priority patent/CN102904036B/zh
Application filed by Kuang-Chi Institute of Advanced Technology, Kuang Chi Innovative Technology Ltd filed Critical Kuang-Chi Institute of Advanced Technology
Publication of WO2013013460A1 publication Critical patent/WO2013013460A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0053—Selective devices used as spatial filter or angular sidelobe filter
    • 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
    • H01Q19/104—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 a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas

Definitions

  • the present invention relates to an antenna, and more particularly to an offset feed microwave antenna made of a metamaterial. ⁇ Background technique ⁇
  • Conventional microwave antennas generally consist of a metal paraboloid and a feed located at the focal point of the metal paraboloid.
  • the metal paraboloid acts to reflect external electromagnetic waves to the feed or to reflect electromagnetic waves emitted by the feed.
  • the area of the metal paraboloid and the processing accuracy of the metal paraboloid directly determine the parameters of the microwave antenna, such as gain, directionality, and the like.
  • the conventional offset-fed microwave antenna has no influence of feed shadows because the feed position of the feed is not on a line perpendicular to the center cut plane of the antenna and across the center of the antenna.
  • the reflective surface of the existing offset-feed microwave antenna is still composed of a metal paraboloid.
  • Metal paraboloids are usually formed by die casting or by CNC machine tools.
  • the process of the first method includes: making a parabolic mold, casting a paraboloid, and installing a parabolic reflector.
  • the process is complicated, the cost is high, and the shape of the paraboloid is relatively accurate to achieve the directional propagation of the antenna, so the processing accuracy is relatively high.
  • the second method uses a large CNC machine for paraboloid machining, and edits the program to control the path of the tool in the CNC machine to cut the desired paraboloid shape. This method is very precise, but it is more difficult and costly to manufacture such a large CNC machine.
  • the technical problem to be solved by the present invention is to provide an offset feeding microwave antenna which is simple in structure, small in volume and high in gain, in view of the above-mentioned deficiencies of the prior art.
  • the technical solution adopted by the present invention to solve the technical problem thereof is: providing an offset feeding microwave antenna, comprising: a feed source, a first metamaterial panel, and a reflective panel attached to a back of the first metamaterial panel;
  • the metamaterial panel includes a core layer, and the core layer is composed of a plurality of core metamaterials having the same refractive index distribution a core layer comprising a core metamaterial sheet substrate and a plurality of first man-made metal microstructures or first manhole structures periodically arranged on the core metamaterial sheet substrate,
  • the refractive index distribution on the core metamaterial sheet satisfies the law: a center point that does not coincide with the center point of the core metamaterial sheet is centered, and the refractive index at the same radius on the core metamaterial sheet is the same, and the radius As the diameter increases, the refractive index gradually decreases.
  • the refractive index at the radius r on the core metamaterial sheet is:
  • L is the vertical distance of the feed to the first metamaterial panel
  • n max is the maximum refractive index value of the core metamaterial sheet
  • d 2 is the thickness of the core layer.
  • a line connecting the feed source and the fixed point is perpendicular to the first meta-material panel, and the fixed point is located on a boundary of the first meta-material panel.
  • the first metamaterial panel boundary is a quadrangle, and the fixed point is located at a midpoint of one side of the quadrangle.
  • the first metamaterial panel boundary is circular, and the fixed point is located on a circular circumference.
  • the arrangement rule of the plurality of first artificial metal microstructures on the core metamaterial sheet layer is: the plurality of first artificial metal microstructures have the same geometric shape, and the fixed point is centered
  • the first man-made metal microstructure at the center of the circle has the largest size
  • the first man-made metal microstructure at the same radius has the same size. As the radius increases, the size of the first man-made metal microstructure decreases.
  • the plurality of first artificial metal microstructures have a geometry of a "work" shape, including a vertical first metal branch and being located at both ends of the first metal branch and perpendicular to the first metal branch The second metal branch.
  • the first man-made metal microstructure further includes a third metal branch located at both ends of the second metal branch and perpendicular to the second metal branch.
  • the plurality of first artificial metal microstructures have a planar snowflake shape, including two first metal branches perpendicular to each other and at both ends of the first metal branch and perpendicular to the first metal The second metal branch of the branch.
  • the first artificial hole structure is filled with a medium having a refractive index smaller than a refractive index of a core metamaterial sheet substrate, and the plurality of the first ones are periodically arranged in a substrate of the core metamaterial sheet layer.
  • the arrangement of the artificial hole structure is as follows: with the fixed point as the center, the first artificial hole structure at the center of the circle has the smallest volume, and the first artificial hole structure at the same radius has the same volume, and the first artificial hole structure increases with the radius The volume increases.
  • the first artificial hole structure is filled with a medium having a refractive index greater than a refractive index of a core metamaterial sheet substrate, and the plurality of the first ones are periodically arranged in a substrate of the core metamaterial sheet layer.
  • the arrangement of the artificial hole structure is as follows: The first artificial hole structure at the center of the circle has the largest volume, and the first artificial hole structure at the same radius has the same volume. The first artificial hole structure increases with the radius.
  • the first meta-material panel further includes a first graded meta-material sheet to an N-th grade meta-material sheet layer disposed outside the core layer, the N-th grade meta-material sheet layer being in close proximity to the a core layer; each graded metamaterial sheet comprises a graded metamaterial sheet substrate and a plurality of second man-made metal microstructures or second manhole structures periodically arranged on the graded metamaterial sheet substrate;
  • the refractive index distribution on the graded metamaterial sheet satisfies the law: with a certain point as the center, the refractive index at the same radius is the same, and the maximum value gradually decreases to the refractive index of each graded metamaterial sheet.
  • each graded metamaterial sheet and core metamaterial sheet have the same refractive index minimum; the center point of the refractive index distribution of each graded metamaterial sheet is the same as the center point of the refractive index distribution of each core metamaterial sheet On the axis.
  • the core metamaterial sheet has a center point of a refractive index distribution center point, and a refractive index at a radius r is:
  • n max is the maximum refractive index value of the core metamaterial sheet
  • d 2 is the thickness of the core layer, for all The thickness of the graded metamaterial sheet has.
  • the center of the refractive index distribution of the super-material sheet layer is the center of the circle, and the refractive index at the radius r is:
  • n 1 (r) n mm +(n(r)-n mm ) * (i/N)
  • N is the total number of layers of the graded metamaterial sheet
  • 1 is the number corresponding to the first graded metamaterial sheet to the Nth graded metamaterial sheet
  • n mm is the same for all graded metamaterial layers The minimum refractive index value.
  • the first graded metamaterial sheet to the layer of the Nth grade metamaterial layer are centered on a center point of the refractive index distribution of each graded metamaterial layer, and the refractive index at a radius r is:
  • n 1 (r) n mm +(n(r)/n mm )(i/N)
  • N is the total number of layers of the graded metamaterial sheet
  • 1 is the number corresponding to the first graded metamaterial sheet to the Nth graded metamaterial sheet
  • n mm is the same for all graded metamaterial layers The minimum refractive index value.
  • the offset feeding microwave antenna further includes a second metamaterial panel for diverging electromagnetic waves radiated by the feed source, wherein the second metamaterial panel is composed of a plurality of first metamaterial sheets having the same refractive index distribution
  • the first metamaterial sheet layer comprises a first substrate and a third artificial metal microstructure or a third artificial hole structure periodically arranged on the first substrate; the first metamaterial sheet layer
  • the refractive index distribution rule satisfies: the refractive index on the first metamaterial sheet is circularly distributed, the center of the circle is located at the center point of the first metamaterial sheet, and the refractive index at the center of the circle is the smallest and increases with the radius , the refractive index of the corresponding radius also increases and the refractive index is the same at the same radius.
  • the second metamaterial panel is in close contact with the feed aperture surface and the second super material panel center point coincides with the feed aperture surface center point.
  • the arrangement rule of the third artificial metal microstructure on the first substrate is: centered on the center point of the first metamaterial sheet, and the third man-made metal microstructure at the center of the circle is the smallest.
  • the third man-made metal microstructures at the same radius have the same size, and as the radius increases, the size of the third man-made metal microstructure increases.
  • the arrangement of the third artificial hole structure on the first substrate is: the third artificial hole structure is filled with a medium having a refractive index smaller than a refractive index of the first substrate, and the first Super material piece
  • the center point of the layer is the center of the circle
  • the third man-made hole structure at the center of the circle has the largest volume
  • the third man-made hole at the same radius has the same volume. As the radius increases, the volume of the third man-made hole decreases.
  • the arrangement of the third artificial hole structure on the first substrate is: the third artificial hole structure is filled with a medium having a refractive index greater than a refractive index of the first substrate, and the first The center point of the super-material layer is the center of the circle, the third man-made hole structure at the center of the circle has the smallest volume, and the third man-made hole at the same radius has the same volume. As the radius increases, the volume of the third man-made hole increases.
  • the present invention uses the metamaterial principle to fabricate an antenna such that the antenna is out of the conventional convex lens shape, concave lens shape, and parabolic shape limitation.
  • the antenna of the present invention can be in the shape of a flat plate or an arbitrary shape, and has a thinner thickness and a larger volume. Small, easy to process and produce, with low cost and good gain effect.
  • FIG. 1 is a schematic perspective view showing a basic structure of a metamaterial base unit according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural view of a bias feed microwave antenna according to a first embodiment of the present invention
  • FIG. 3 is a schematic diagram showing a refractive index distribution of a first metamaterial panel in a quadrilateral shape of a bias feed microwave antenna according to a first embodiment of the present invention
  • FIG. 4 is a schematic diagram showing a refractive index distribution of a first metamaterial panel in a circular feed antenna according to a first embodiment of the present invention
  • Figure 5 is a perspective view showing the structure of a second metamaterial sheet constituting a second metamaterial panel in the first embodiment of the present invention
  • Figure 6 is a geometrical topographical pattern of the artificial metal microstructure of the first preferred embodiment of the first embodiment which is capable of responding to electromagnetic waves to change the refractive index of the base element of the metamaterial;
  • Figure 7 is a derivative pattern of the artificial metal microstructure geometry topographic pattern of Figure 6;
  • Figure 8 is a geometrical topographical pattern of a man-made metal microstructure of a second preferred embodiment of the first embodiment capable of responding to electromagnetic waves to change the refractive index of the base element of the metamaterial;
  • Figure 9 is a derivative pattern of the artificial metal microstructure geometry topographic pattern of Figure 7;
  • FIG. 10 is a schematic perspective structural view of a basic unit constituting a metamaterial according to a second embodiment of the present invention
  • FIG. 11 is a schematic structural view of a bias feed microwave antenna according to a second embodiment of the present invention.
  • Figure 12 is a perspective view showing the structure of a first metamaterial sheet 300 in the second embodiment of the present invention.
  • the stereoscopic image display method and the corresponding stereoscopic image display device according to the present invention are embodied in the following with reference to the accompanying drawings and preferred embodiments.
  • the methods, methods, steps, structures, features and their functions are described in detail below.
  • the foregoing and other objects, features, and advantages of the invention will be apparent from the Detailed Description
  • the description of the specific embodiments is intended to be illustrative, and not restrictive.
  • the dielectric constant and magnetic permeability of each point of the material are the same or different, so that the dielectric constant and magnetic permeability of the material are arranged regularly, and the magnetic permeability and the regular arrangement are regularly arranged.
  • the electrical constant allows the material to have a macroscopic response to electromagnetic waves, such as converging electromagnetic waves, diverging electromagnetic waves, and the like. This type of material with regularly arranged magnetic permeability and dielectric constant is called a metamaterial.
  • FIG. 1 is a schematic perspective structural view of a basic unit constituting a metamaterial according to a first embodiment of the present invention.
  • the basic unit of the metamaterial includes the artificial microstructure 1 and the substrate 2 to which the artificial microstructure is attached.
  • the artificial microstructure is an artificial metal microstructure
  • the artificial metal microstructure has a planar or stereo topology capable of responding to an incident electromagnetic wave electric field and/or a magnetic field, and changes the artificial metal micro on each metamaterial basic unit.
  • the pattern and/or size of the structure changes the response of each metamaterial base unit to incident electromagnetic waves.
  • the arrangement of a plurality of metamaterial basic units in a regular pattern enables the metamaterial to have a macroscopic response to electromagnetic waves.
  • each metamaterial basic unit to the incident electromagnetic wave needs to form a continuous response, which requires that the size of each metamaterial basic unit is one tenth to five fifths of the incident electromagnetic wave.
  • it is preferably one tenth of the incident electromagnetic wave.
  • we artificially divide the supermaterial into a plurality of basic units of metamaterials but it should be understood that this method of division is only convenient for description, and should not be regarded as supermaterial being spliced or assembled by multiple metamaterial basic units.
  • the super material is formed by arranging the artificial metal microstructure period on the substrate, and the process is simple and the cost is low.
  • the periodic arrangement means that the man-made metal microstructures on the basic units of each metamaterial divided by us can produce a continuous electromagnetic response to incident electromagnetic waves.
  • FIG. 2 is a schematic structural diagram of a bias feed microwave antenna according to a first embodiment of the present invention.
  • the offset-type microwave antenna includes a feed source 20, a first meta-material panel 10, and a reflective panel 40 attached to the back of the first super-material panel 10.
  • the reflective panel 40 is a metal reflective panel.
  • the line connecting the feed source 20 to the center point of the outer surface of the first metamaterial panel 10 is at an angle ⁇ which is not equal to 180° with respect to the horizontal plane, and the vertical distance between the feed source 20 and the first metamaterial panel 10 is L.
  • the angle between the connection of the feed source 20 and the center point of the outer surface of the first metamaterial panel 10 and the horizontal plane is 45°
  • the vertical intersection of the feed source 20 and the first metamaterial panel 10 is located at the first metamaterial.
  • the overall height of the first metamaterial panel 10 at this time is 2L.
  • the first metamaterial panel 10 includes a core layer composed of a plurality of core metamaterial sheets having the same refractive index distribution.
  • the basic unit constituting the core metamaterial sheet is shown in Fig. 1.
  • the core metamaterial sheet layer comprises a core metamaterial sheet substrate and a plurality of first man-made metal microstructures periodically arranged on the core metamaterial sheet substrate.
  • the plurality of first artificial metal microstructures are further covered with a cover layer such that the first artificial metal microstructure is encapsulated, and the cover layer is of the same material and equal thickness as the core metamaterial sheet substrate.
  • Each of the man-made metal microstructures and a portion of the core metamaterial sheet material to which they are attached constitute the basic unit of the core metamaterial sheet.
  • the thickness of the cover layer and the core metamaterial sheet substrate are both 0.4 mm, and the thickness of the artificial metal microstructure layer is 0.018 mm, so that the thickness of each core metamaterial sheet is 0.818 mm.
  • the entire core layer has a thickness d 2 .
  • the refractive index distribution of the first metamaterial panel 10 needs to satisfy the law: With a fixed point that does not coincide with the center of the core metamaterial sheet, the refractive index at the same radius on the core metamaterial sheet is the same, and as the radius increases, the refractive index gradually decreases.
  • the center of the circle is located on the boundary of the first metamaterial panel, and the line connecting the center and the feed is perpendicular to the first metamaterial panel.
  • the center 0 When the boundary shape of the first metamaterial panel is a quadrilateral, the center 0 is located at a midpoint of one side of the quadrilateral, as shown in FIG. 3; when the boundary shape of the first metamaterial panel is circular, the center 0 is located at the center On the circumference of the circle, as shown in Figure 4. As shown in FIG. 3 and FIG. 4, when the center of the circle is located on the boundary of the first metamaterial panel, the region where the center of the circle is located is the region where the maximum refractive index is on the first metamaterial panel, and the first metamaterial panel is refracted.
  • the line connecting the center point of the basic unit of the same rate is an arc formed by the cutting of the plurality of concentric circles by the boundary of the first metamaterial panel.
  • the expression of the refractive index n corresponding to the radius r on the first metamaterial panel is:
  • n max is the maximum refractive index value of the core layer
  • L is the vertical distance of the feed to the first metamaterial panel, that is, the connection distance between the feed and the center of the circle
  • d 2 is the first metamaterial panel core Layer thickness.
  • the core layer thickness d 2 , the core layer height 2L, and the maximum distance of the feed source 20 to the vertical distance of the first metamaterial panel preferably, the core layer thickness d 2 , the core layer height 2L, and the maximum distance of the feed source 20 to the vertical distance of the first metamaterial panel.
  • the rate n max and the minimum refractive index n mm of the core layer must satisfy the following relationship:
  • a first graded metamaterial may be disposed outside the core layer of the first metamaterial panel 10.
  • Sheet to Nth grade metamaterial sheet The basic unit of each graded metamaterial sheet is shown in Figure 1.
  • Each graded metamaterial sheet also includes a graded metamaterial sheet substrate and a plurality of second periodically arranged on the graded metamaterial sheet substrate.
  • the man-made metal microstructure is also the same size as the core metamaterial sheet, including a 0.4 mm thick overlay, a 0.4 mm thick graded metamaterial sheet substrate, and a 0.018 mm thick second man-made metal microstructure.
  • a second man-made metal microstructure and a portion of the graded metamaterial sheet material to which it is attached constitute the basic unit of the graded metamaterial sheet.
  • the refractive index distribution on each graded metamaterial layer satisfies the law: with a certain point as the center, the refractive index at the same radius is the same, and as the radius increases, the refractive index gradually decreases from the maximum value of each graded metamaterial layer.
  • the line connecting the fixed point and the feed source is perpendicular to the graded metamaterial sheet layer and the fixed point is located on the boundary of the graded metamaterial sheet layer; each graded metamaterial sheet layer and the core metamaterial sheet layer have The same refractive index minimum.
  • each of the graded metamaterial sheets has a minimum refractive index equal to a minimum refractive index of the core metamaterial sheet, that is, both are n mm .
  • the first graded metamaterial to the Nth grade metamaterial sheet has a maximum refractive index of ⁇ , n 2 ... n n , respectively, and satisfies ⁇ ⁇ 2 ⁇ ... ⁇ n n ⁇ n max .
  • All graded metamaterial sheets have a total thickness, and all metamaterial layers are equal in height to the core metamaterial sheet, both 2L
  • the refractive index distribution formula of the core metamaterial sheet changes to:
  • the core layer thickness d 2 the graded metamaterial sheet core layer height 2L, and the vertical distance L between the feed source 20 and the second metamaterial panel
  • the maximum refractive index n max of the core layer and the minimum refractive index n mm of the core layer must satisfy the following relationship:
  • each graded metamaterial sheet can be in many forms, such as each gradient over each linear distribution Material slice expression:
  • n 1 (r) n mm +(n(r)-n mm ) * (i/N)
  • N is the total number of layers of the graded metamaterial sheet
  • 1 is the first graded metamaterial sheet to the Nth gradient
  • the serial number corresponding to the super-material layer, that is, i takes values 1, 2, and 3 N.
  • each graded metamaterial layer can also be distributed with a power value.
  • each gradient metamaterial layer expression is:
  • N is the total number of layers of the graded metamaterial sheet
  • 1 is the number corresponding to the first graded metamaterial sheet to the Nth graded metamaterial sheet, ie, i takes values 1, 2, 3 N.
  • the present invention also provides a second metamaterial panel 30 that functions to divergence electromagnetic waves emitted by the feed to increase the near range of radiation of the feed.
  • the position of the second metamaterial panel 30 can also be closely spaced from the feed port of the feed source.
  • the second metamaterial panel 30 is in close contact with the transmitting port of the feed source 20.
  • the second metamaterial panel 30 is composed of a plurality of first metamaterial sheets 300 having the same refractive index distribution.
  • FIG. 5 is a schematic perspective view of the first metamaterial sheet 300 in the first embodiment of the present invention.
  • the first metamaterial sheet 300 includes a first substrate 301 and a plurality of third artificial elements periodically arranged on the first substrate.
  • the metal microstructures 302, preferably, are covered with a plurality of third man-made metal microstructures 302, such that the third man-made metal microstructures 302 are encapsulated, the cover layer 303 being equal to the first substrate material 302 and of equal thickness .
  • the thickness of the cover layer 303 and the first substrate 302 are both 0.4 mm, and the thickness of the artificial metal microstructure layer is 0.018 mm, so that the thickness of the entire first metamaterial sheet is 0.818 mm.
  • the basic unit constituting the first metamaterial sheet 300 is still as shown in Fig. 1, but the first metamaterial sheet 300 is required to have a function of diverging electromagnetic waves, and the electromagnetic waves are deflected in a direction in which the refractive index is large according to the electromagnetic principle. Therefore, the refractive index change rule on the first metamaterial sheet layer 300 is: the first metamaterial sheet layer 300 has a circular refractive index, and the center of the circle is located at the center point of the first metamaterial sheet layer, and the refractive index at the center of the circle is the smallest and As the radius increases, the refractive index of the corresponding radius also increases and the refractive index at the same radius is the same.
  • the first metamaterial sheet 300 having such a refractive index distribution causes the electromagnetic waves radiated from the radiation source 20 to be diverged to increase the close range of the radiation source, so that the offset feeding microwave antenna as a whole can be made smaller in size.
  • the overall refractive index distribution relationship between the first metamaterial panel and the second metamaterial panel is discussed in detail above. From the principle of metamaterials, the size and pattern of the artificial metal microstructure attached to the substrate directly determine the refractive index of each point of the metamaterial. value. At the same time, according to the experiment, the larger the size of the man-made metal micro-structure of the same geometry, the larger the refractive index of the corresponding meta-material basic unit.
  • the plurality of first artificial metal microstructures, the plurality of second artificial metal microstructures, and the plurality of third artificial metal microstructures have the same geometric shape, thereby constituting the second metamaterial.
  • the third man-made metal microstructure arrangement on the first meta-material layer of the panel is: the plurality of third artificial microstructures are the third man-made metal microstructures and the geometric shapes are the same, and the third man-made metal microstructures are
  • the first substrate has a circular distribution, and the third man-made metal microstructure at the center of the circle has the smallest size. As the radius increases, the size of the third man-made metal microstructure corresponding to the radius also increases and the same radius The three man-made metal microstructures are the same size.
  • the second man-made metal microstructure arrangement on the graded metamaterial sheet is:
  • the geometry of the plurality of second man-made metal microstructures is the same, with a fixed point that does not coincide with the center point of the graded metamaterial layer, the core super
  • the second man-made metal microstructures at the same radius on the sheet of material are the same size, and as the radius increases, the second man-made metal microstructure decreases in size.
  • the first man-made metal microstructure arrangement on the core metamaterial sheet is:
  • the geometry of the plurality of first man-made metal microstructures is the same, with a fixed point that does not coincide with the center point of the graded metamaterial layer, the core super
  • the first man-made metal microstructures at the same radius on the sheet of material are the same size, and as the radius increases, the size of the first metal-made microstructure decreases.
  • the geometry of the man-made metal microstructure that satisfies the refractive index profile requirements of the first metamaterial panel and the second metamaterial panel described above is various, but is basically a geometry that is responsive to incident electromagnetic waves. Since it is difficult to change the incident electromagnetic wave magnetic field, most of the artificial metal microstructures are capable of incident The geometry of the electromagnetic wave field response, the most typical is the "work" shaped man-made metal microstructure. Several man-made metal microstructure geometries are described in detail below.
  • the first metamaterial panel and the second metamaterial panel can adjust the size of the artificial metal microstructure according to the required maximum refractive index and minimum refractive index to meet the requirements, and the adjustment manner can be calculated by computer simulation or manually. Since it is not the focus of the present invention, it will not be described in detail.
  • Fig. 6 is a geometrical topography diagram of a man-made metal microstructure according to a first preferred embodiment of the first embodiment of the present invention which is capable of responding to electromagnetic waves to change the refractive index of the base element of the supermaterial.
  • the man-made metal microstructure has a "work" shape, including a vertical first metal branch 1021 and a second metal branch 1022 that is perpendicular to the first metal branch 1021 and located at both ends of the first metal branch
  • FIG. 7 is a diagram A derivative pattern of the man-made metal microstructure geometry topography pattern includes not only the first metal branch 1021 and the second metal branch 1022, and a third metal branch 1023 is vertically disposed at each end of each of the second metal branches.
  • Fig. 8 is a geometrical topography diagram of a man-made metal microstructure according to a second preferred embodiment of the first embodiment of the present invention which is capable of responding to electromagnetic waves to change the refractive index of the base element of the supermaterial.
  • the artificial metal microstructure is a flat snowflake type, including a first metal branch 1021 perpendicular to each other, and two first metal branches 1021, and a second metal branch 1022 is vertically disposed at both ends;
  • FIG. 9 is FIG. a derivative pattern of the artificial metal microstructure geometry topography shown, comprising not only two first metal branches 1021, but also four second metal branches 1022, wherein the four second metal branches are also vertically disposed with a third metal branch 1023,.
  • the first metal branches 1021 are equal in length and intersect perpendicular to the midpoint
  • the second metal branches 1022 are of equal length and the midpoint is at the end of the first metal branch
  • the third metal branch 1023 is of equal length and the second point is at the second
  • the metal branch end point; the above metal branch is arranged such that the man-made metal microstructure is isotropic, that is, the artificial metal microstructure 90° can be rotated in any direction in the plane of the man-made metal microstructure to coincide with the original man-made metal microstructure.
  • the use of isotropic man-made metal microstructures simplifies design and reduces interference.
  • FIG. 10 is a schematic perspective structural view of a basic unit constituting a metamaterial according to a second embodiment of the present invention.
  • the basic unit of the metamaterial includes the substrate 2, and the artificial pore structure formed in the substrate 2 Hey.
  • the artificial pore structure 1 is formed in the substrate 2 such that the dielectric constant and magnetic permeability of the substrate 2 differ with the volume of the artificial pore structure, so that the entrance of each metamaterial basic unit to the same frequency Waves have different electromagnetic responses.
  • the arrangement of a plurality of metamaterial basic units in a regular pattern enables the metamaterial to have a macroscopic response to electromagnetic waves.
  • each metamaterial basic unit to the incident electromagnetic wave needs to form a continuous response, which requires that the size of each metamaterial basic unit is one tenth to five fifths of the incident electromagnetic wave.
  • it is preferably one tenth of the incident electromagnetic wave.
  • we artificially divide the supermaterial into a plurality of basic units of metamaterials but it should be understood that this method of division is only convenient for description, and should not be regarded as supermaterial being spliced or assembled by multiple metamaterial basic units.
  • the super material is formed by arranging the artificial pore structure cycle in the substrate, and the process is simple and the cost is low.
  • the periodic arrangement means that the above-mentioned artificially divided super-material basic units can generate a continuous electromagnetic response to incident electromagnetic waves.
  • FIG. 11 is a schematic structural diagram of a bias feed microwave antenna according to a second embodiment of the present invention.
  • the offset-type microwave antenna includes a feed source 20, a first meta-material panel 10, and a reflective panel 40 attached to the back of the first meta-material panel 10'.
  • the reflective panel 40 is a metal reflective layer. panel.
  • the present embodiment differs from the first embodiment in that the first metamaterial panel 10' includes a core layer composed of a plurality of core metamaterial sheets having the same refractive index distribution.
  • the basic unit constituting the core metamaterial sheet is as shown in FIG. 10, and the core metamaterial sheet layer comprises a core metamaterial sheet substrate and a plurality of first manhole structures periodically arranged in the core metamaterial sheet substrate. Each of the man-made hole structures and a portion of the core metamaterial sheet material they occupy constitute the basic unit of the core metamaterial sheet.
  • a first graded metamaterial layer may be disposed outside the core layer of the first metamaterial panel 10.
  • the basic unit of each graded metamaterial sheet is shown in Figure 1.
  • Each graded metamaterial sheet also includes a graded metamaterial sheet substrate and a plurality of second periodically arranged on the graded metamaterial sheet substrate.
  • the man-made hole structure, each of the second manhole structure and the portion of the progressive metamaterial sheet material that it occupies constitutes the basic unit of the core metamaterial sheet.
  • the rule that the refractive index distribution on each of the graded metamaterial sheets is satisfied is the same as that of the first embodiment.
  • the embodiment further provides a second metamaterial panel 30'.
  • the second metamaterial panel 30' functions to diverge electromagnetic waves emitted by the feed to improve the short-range radiation range of the feed.
  • the second metamaterial panel 30 can be positioned close to the feed port of the feed and can also be separated from the feed by a certain distance. In this embodiment, the second metamaterial panel 30' is in close contact with the transmitting port of the feed source 20.
  • the second metamaterial panel 30' is composed of a plurality of first metamaterial sheets 300' having the same refractive index distribution, as shown in FIG. 12, and FIG. 12 is a first metamaterial sheet 300 in the second embodiment of the present invention.
  • the schematic view of the three-dimensional structure, the first metamaterial sheet 300 includes a first substrate 301, and a plurality of third manhole structures 302 periodically arranged in the first substrate.
  • the basic unit constituting the first metamaterial sheet 300' is still as shown in Fig. 10, but the first metamaterial sheet 300' needs to have a function of diverging electromagnetic waves, and according to the electromagnetic principle, the electromagnetic waves are deflected in a direction in which the refractive index is large. Therefore, the refractive index change rule on the first metamaterial sheet layer 300 is: the first metamaterial sheet layer 300 has a circular distribution of refractive index, and the center of the circle is located at the center point of the first metamaterial sheet layer, and the refractive index at the center of the circle is the smallest. And as the radius increases, the refractive index of the corresponding radius also increases and the refractive index at the same radius is the same.
  • the first metamaterial sheet 300 having such a refractive index distribution causes the electromagnetic waves radiated from the radiation source 20 to be diverged to increase the close range of the radiation source, so that the offset feeding microwave antenna as a whole can be smaller in size.
  • the overall refractive index distribution relationship between the first metamaterial panel and the second metamaterial panel is discussed in detail above. From the principle of metamaterials, the volume of the artificial pore structure in the substrate directly determines the refractive index value of each point of the metamaterial. At the same time, according to experiments, when the artificial pore structure is filled with a medium having a refractive index smaller than that of the substrate, the larger the volume of the artificial pore structure, the smaller the refractive index of the corresponding metamaterial basic unit.
  • the third artificial hole structure arrangement on the first metamaterial sheet constituting the first metamaterial panel is:
  • the third artificial hole structure is filled with a medium having a refractive index smaller than a refractive index of the first substrate, and the plurality of third artificial hole structures of the first metamaterial sheet layer are circularly distributed on the first substrate.
  • the third artificial hole structure at the center of the circle has the largest volume. As the radius increases, the volume of the third artificial hole structure corresponding to the radius decreases and the volume of the third artificial hole structure at the same radius is the same.
  • the second artificial hole structure arrangement on the graded metamaterial sheet is: the second artificial hole structure is filled with a medium having a refractive index smaller than that of the graded super material sheet base material, and the The fixed point of the center point of the layer is the center of the circle, and the second manhole structure at the same radius on the core metamaterial sheet has the same volume, and the size of the second manhole structure increases with the increase of the radius.
  • the first artificial hole structure on the core metamaterial sheet is arranged in the following manner: the first artificial hole structure is filled with a medium having a refractive index smaller than that of the core super material sheet substrate, and the The fixed point of the center point of the layer is the center of the circle, and the first manhole structure at the same radius on the core metamaterial layer has the same structure size, and the size of the first hole structure decreases as the radius increases.
  • the medium in which the first artificial hole structure, the second artificial hole structure, and the third artificial hole structure are filled with a refractive index smaller than the refractive index of each substrate is air.
  • the volume of each artificial hole may be opposite to the above-mentioned arrangement.
  • the shape of the artificial hole structure satisfying the refractive index distribution requirements of the first metamaterial panel and the second metamaterial panel described above is not limited as long as the volume of the base unit of the metamaterial occupied by the above is satisfied.
  • a plurality of artificial hole structures of the same volume may be formed in each of the metamaterial base units, and it is necessary to make the sum of all the artificial hole volumes on each of the metamaterial base units satisfy the above arrangement rule.

Landscapes

  • Aerials With Secondary Devices (AREA)

Abstract

La présente invention concerne une antenne à micro-ondes à alimentation latérale comprenant une alimentation, un premier panneau en métamatériau et un panneau réfléchissant fixé à l'arrière du premier panneau en métamatériau, à l'endroit où une connexion entre l'alimentation et le centre de la surface extérieure du premier métamatériau est pourvu d'un angle θ différent de 180°. Une onde électromagnétique sphérique émise par l'alimentation est réfractée par le biais du premier métamatériau, réfléchie par le panneau réfléchissant et à nouveau réfractée par le premier panneau en métamatériau, puis finalement transmise vers l'extérieur en tant qu'onde électromagnétique plane. La présente invention utilise le principe de métamatériau pour fabriquer l'antenne, ce qui permet de détacher l'antenne des restrictions de forme de lentille concave classique et de forme parabolique. Si la présente invention est utilisée, l'antenne peut présenter une forme de panneau ou n'importe quelle forme souhaitée, une épaisseur réduite, une taille réduite et un traitement et une fabrication facilités, et fournit des effets bénéfiques permettant de réduire les coûts et d'améliorer l'effet du gain.
PCT/CN2011/082818 2011-07-26 2011-11-24 Antenne à micro-ondes à alimentation latérale Ceased WO2013013460A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201110210316.X 2011-07-26
CN 201110210316 CN102480023B (zh) 2011-07-26 2011-07-26 一种偏馈式微波天线
CN201110210315.5A CN102904036B (zh) 2011-07-26 2011-07-26 一种偏馈式微波天线
CN201110210315.5 2011-07-26

Publications (1)

Publication Number Publication Date
WO2013013460A1 true WO2013013460A1 (fr) 2013-01-31

Family

ID=47600500

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/082818 Ceased WO2013013460A1 (fr) 2011-07-26 2011-11-24 Antenne à micro-ondes à alimentation latérale

Country Status (1)

Country Link
WO (1) WO2013013460A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014165590A (ja) * 2013-02-22 2014-09-08 Mitsubishi Electric Corp アンテナ装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4506271A (en) * 1982-09-27 1985-03-19 Gonzalez Brian L Portable antenna with wedge-shaped reflective panels
CN2867629Y (zh) * 2006-01-20 2007-02-07 李宪明 一种模压微波天线
CN101938031A (zh) * 2010-08-26 2011-01-05 南京电子计量有限公司 单人便携式偏馈卫星天线

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4506271A (en) * 1982-09-27 1985-03-19 Gonzalez Brian L Portable antenna with wedge-shaped reflective panels
CN2867629Y (zh) * 2006-01-20 2007-02-07 李宪明 一种模压微波天线
CN101938031A (zh) * 2010-08-26 2011-01-05 南京电子计量有限公司 单人便携式偏馈卫星天线

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014165590A (ja) * 2013-02-22 2014-09-08 Mitsubishi Electric Corp アンテナ装置

Similar Documents

Publication Publication Date Title
WO2013013465A1 (fr) Antenne radar de type cassegrain
CN102480024B (zh) 一种后馈式雷达天线
CN102544745A (zh) 一种混合透反射微波天线
CN102480030B (zh) 一种前馈式微波天线
CN102480034A (zh) 一种后馈式微波天线
WO2013013462A1 (fr) Antenne à micro-ondes à alimentation avant
WO2013013461A1 (fr) Antenne cassegrain à micro-ondes
CN102480023A (zh) 一种偏馈式微波天线
CN202231153U (zh) 一种偏馈式微波天线
CN202217791U (zh) 一种前馈式微波天线
CN202231158U (zh) 一种偏馈式微波天线
WO2013013460A1 (fr) Antenne à micro-ondes à alimentation latérale
CN102480032B (zh) 一种偏馈式雷达天线
CN102480065B (zh) 一种前馈式微波天线
CN102790278B (zh) 定向天线
CN202259696U (zh) 一种前馈式微波天线
CN102904036B (zh) 一种偏馈式微波天线
CN202231157U (zh) 一种偏馈式微波天线
CN102480033B (zh) 一种偏馈式微波天线
CN102904043B (zh) 一种前馈式微波天线
CN102904046B (zh) 一种偏馈式微波天线
WO2013013463A1 (fr) Antenne à micro-ondes de type cassegrain
WO2013013468A1 (fr) Antenne radar à alimentation décalée
WO2013013464A1 (fr) Antenne à micro-ondes à alimentation décalée
CN102904037B (zh) 一种前馈式微波天线

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11870080

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11870080

Country of ref document: EP

Kind code of ref document: A1