CN103296486B - A kind of partial feedback microwave antenna system - Google Patents
A kind of partial feedback microwave antenna system Download PDFInfo
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- CN103296486B CN103296486B CN201210051019.XA CN201210051019A CN103296486B CN 103296486 B CN103296486 B CN 103296486B CN 201210051019 A CN201210051019 A CN 201210051019A CN 103296486 B CN103296486 B CN 103296486B
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Abstract
The present invention disclose a kind of partial feedback microwave antenna system, its Meta Materials, feed and reflection unit below Meta Materials, and the reflection unit and horizontal line are into θrOverturning angle is placed, and the Meta Materials are by first to n-th layer metamaterial sheet and be close to the reflecting plate of n-th layer metamaterial sheet and constitute, and every layer of metamaterial sheet includes multiple artificial metal's micro-structurals on base material and cycle arrangement base material；The electromagnetic wave of the feed radiation reflexes to the Meta Materials by the reflection unit, and electromagnetic wave is radiate by the Meta Materials in plane wave form.The present invention enables electromagnetic wave to be radiated with plane electromagnetic wave, so as to improve the entire gain of antenna system by using Meta Materials modulated electromagnetic wave.Meanwhile, microwave antenna system of the present invention rationally sets the position of feed and circular cone reflector and Meta Materials so that the far field maximum and half-power bandwidth of microwave antenna system show very good.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of partial feedback microwave antenna system.
Background technology
Conventional microwave antenna is typically constituted by metal parabola and positioned at the feed of metal parabolic focus, and metal is thrown
The acting as of object plane is gone out by outside reflection of electromagnetic wave to feed or by the reflection of electromagnetic wave that feed is launched.Metal parabola
Area and the paraboloidal machining accuracy of metal directly determine the parameters of microwave antenna, such as gain, directionality.It is existing
Some offset-feed type microwave antennas are not because the installation site of its feed is vertical with center of antenna tangent plane and mistake center of antenna
On straight line, therefore conventional offset-feed type microwave antenna does not have the influence of feed shade.But existing offset-feed type microwave antenna is anti-
The face of penetrating is still to be made up of metal parabola.
The method that metal parabola is processed generally using die casting and molding or using Digit Control Machine Tool.The first side
The technological process of method includes：Make parabola mould, casting parabola and the installation for carrying out parabolic reflector.Technics comparing
Complexity, cost is high, and paraboloidal shape will compare could accurately realize the direction propagation of antenna, so to machining accuracy
It is required that also higher.Second method carries out paraboloidal processing using large-size numerical control machine, by edit routine, controls numerical control
Cutter walks path in lathe, so as to cut out required parabolic shape.This method cutting is very accurate, but manufactures this
Large-size numerical control machine is relatively difficult, and cost is higher.
The content of the invention
The technical problems to be solved by the invention are, for the above-mentioned deficiency of prior art, propose a kind of based on super material
Prepared by material principle, far field maximum and half-power bandwidth show good partial feedback microwave antenna system.
The technical scheme that the present invention solves the use of its technical problem is to propose a kind of partial feedback microwave antenna system, it includes
Meta Materials, feed and reflection unit below Meta Materials, the reflection unit and horizontal line are into θrOverturning angle is placed, institute
Meta Materials are stated by first to n-th layer metamaterial sheet and is close to the reflecting plate of n-th layer metamaterial sheet and constitutes, every layer of super material
Tablet layer includes multiple artificial metal's micro-structurals on base material and cycle arrangement base material；The electromagnetic wave of the feed radiation is by institute
State reflection unit and reflex to the Meta Materials, electromagnetic wave is radiate by the Meta Materials in plane wave form.
Further, the feed is electromagnetic horn, and the axis of the electromagnetic horn and horizontal angle are θ.
Further, described first into n-th layer metamaterial sheet in i-th layer of metamaterial sheet, away from i-th layer of Meta Materials piece
Index distribution at layer lower edge y is met：
Wherein,
In above formula, nmaxFor the largest refractive index value of the Meta Materials, nminFor the minimum refractive index value of the Meta Materials, λ
The electromagnetic wavelength radiated for the feed, d is the gross thickness of the Meta Materials, upper edges and institute of the px for the reflection unit
State the vertical range of Meta Materials, LRFor the reflection unit length, θrFor the reflection unit and horizontal line angle, floor functions
For downward bracket function.
Further, artificial metal's micro-structural is in plane flakes, and artificial metal's micro-structural, which has, mutually hangs down
The first metal wire and the second metal wire directly divided equally, first metal wire are identical with the length of the second metal wire, and described first
Metal wire two ends are connected with two the first metal branch of equal length, and the first metal wire two ends are connected to two the first gold medals
On the midpoint for belonging to branch, the second metal wire two ends are connected with two the second metal branch of equal length, second gold medal
Category line two ends are connected on the midpoint of two the second metal branch, the length phase of first metal branch and the second metal branch
Deng.
Further, the first metal wire and the second metal wire of the metal micro structure of the plane flakes are provided with two
Individual kink, the metal micro structure of the plane flakes around the axis perpendicular to the first metal wire and the second metal wire intersection point to
The figure that any direction is rotated by 90 ° all is overlapped with artwork.
Further, the vertical range of the reflection unit upper edge and the Meta Materials is 0.5 meter to 0.65 meter, described
Reflection unit and horizontal angle are 63 ° to 66 °, during the reflection unit length is 0.3 to 0.4 meter, the electromagnetic horn
Axis and horizontal angle are 7 ° to 12 °.
Further, the vertical range of the reflection unit upper edge and the Meta Materials is 0.35 meter, the loudspeaker day
Line and horizontal line angle are 7 °, and the reflection unit and horizontal angle are 46 ° to 64 °.
Further, the vertical range of the reflection unit upper edge and the Meta Materials is 0.35 meter, the reflection dress
It is 50 ° to 53 ° to put with horizontal angle, and the electromagnetic horn and horizontal angle are 7 ° to 20 °.
Further, the vertical range of the reflection unit upper edge and the Meta Materials is 0.35 meter, the reflection dress
It is 50 ° to 53 ° to put with horizontal angle, and the electromagnetic horn and horizontal angle are 10 ° to 16 °, the reflection unit
Length is 0.2 meter to 0.3 meter.
Further, the reflection unit and horizontal line angle are 53 °, and the length of the reflection unit is 0.25 meter, institute
It is 12 ° that electromagnetic horn axis, which is stated, with horizontal line angle, and the upper edge of the reflection unit and the vertical range of Meta Materials are
0.35 meter.
The present invention is crossed electromagnetism wave energy and radiated with plane electromagnetic wave, so as to improve by using Meta Materials modulated electromagnetic wave
The entire gain of antenna system.Meanwhile, microwave antenna system of the present invention rationally sets feed and circular cone reflector and Meta Materials
Position so that the far field maximum and half-power bandwidth of microwave antenna system show very good.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram for the elementary cell for constituting Meta Materials；
Fig. 2 is the structural representation of partial feedback microwave antenna system of the present invention；
Fig. 3 is the emulation schematic diagram of partial feedback microwave antenna system of the present invention；
Fig. 4 is the structural representation of Meta Materials；
Fig. 5 is the schematic diagram of the metal micro structure of plane flakes of the present invention；
Fig. 6 is a kind of derived structure of the metal micro structure of the plane flakes shown in Fig. 5；
Fig. 7 is a kind of distressed structure of the metal micro structure of the plane flakes shown in Fig. 5；
The first stage that Fig. 8 develops for the topology of the metal micro structure of plane flakes；
The second stage that Fig. 9 develops for the topology of the metal micro structure of plane flakes；
Figure 10 is preferred scheme far field simulation result figure of the present invention.
Embodiment
Light, as one kind of electromagnetic wave, it is when through glass, because the wavelength of light is much larger than the chi of atom
It is very little, therefore we can use the univers parameter of glass, such as refractive index, rather than the details parameter of the atom of composition glass to retouch
State response of the glass to light.Accordingly, when research material is to other electromagnetic responses, any yardstick is far small in material
The univers parameter of material, such as permittivity ε and magnetic permeability μ can also be used to responding for electromagnetic wave in the structure of electromagnetic wavelength
To describe.Cause the dielectric constant and magnetic conductivity of material each point all identical by the designing material structure of every or it is different so as to
So that the overall dielectric constant of material and magnetic conductivity are arranged in certain rule, the magnetic conductivity and dielectric constant of rule arrangement can make
Material is obtained to electromagnetic wave with response macroscopically, such as convergence electromagnetic wave, divergent electromagnetic ripple.Such has what rule was arranged
We term it Meta Materials for the material of magnetic conductivity and dielectric constant.
As shown in figure 1, dimensional structure diagrams of the Fig. 1 for the elementary cell of composition Meta Materials.The elementary cell of Meta Materials
The base material 1 adhered to including man-made microstructure 2 and the man-made microstructure.In the present invention, man-made microstructure is the micro- knot of artificial metal
Structure, artificial metal's micro-structural has the plane or three-dimensional topological structure that response can be produced to incident electromagnetic wave electric field and/or magnetic field,
Changing the pattern and/or size of artificial metal's micro-structural in each Meta Materials elementary cell, can to change each Meta Materials basic
Response of the unit to incident electromagnetic wave.In the present invention, coating 3, coating 3, artificial micro- knot are also covered with man-made microstructure 2
Structure 2 and base material 1 constitute the elementary cell of Meta Materials of the present invention.Multiple Meta Materials elementary cells arrange can make according to certain rules
Obtaining Meta Materials has the response of macroscopic view to electromagnetic wave.Because Meta Materials integrally need have macroscopical electromagnetic response to incident electromagnetic wave therefore
Each response of Meta Materials elementary cell to incident electromagnetic wave need to form continuous response, and this requires each Meta Materials elementary cell
Size is less than 1/5th of incident electromagnetic wave wavelength, preferably 1/10th of incident electromagnetic wave wavelength.In this segment description, I
It is artificial Meta Materials are integrally divided into multiple Meta Materials elementary cells, but such a division methods should be known only for convenience of description,
Meta Materials should not be regarded as to be spliced or assembled by multiple Meta Materials elementary cells, Meta Materials are by artificial metal in practical application
The micro-structural cycle is arranged on base material and may make up, and technique is simple and with low cost.Cycle arrangement refer to it is above-mentioned we artificially draw
The artificial metal's micro-structural in each Meta Materials elementary cell divided can produce continuous electromagnetic response to incident electromagnetic wave.
As shown in Figure 2 and Figure 3, Fig. 2, Fig. 3 are respectively that the structural representation of partial feedback microwave antenna system of the present invention and emulation are shown
It is intended to.In Fig. 3, undulatory striped represents electromagnetic wave, and the closeer striped of density is to represent that electromagnetic wave gain is higher at this.This hair
Bright partial feedback microwave antenna system includes Meta Materials 10 and the feed 20 positioned at the lower section of Meta Materials 10, and feed 20 is electromagnetic horn,
The axis of electromagnetic horn and horizontal angle are θ, in addition to reflection unit 30, and the length of reflection unit 30 is LR, itself and water
The angle of horizontal line is θr, the upper edge of reflection unit is PX with the vertical range of Meta Materials 10.The electromagnetic wave of electromagnetic horn radiation
Responded after being reflected by reflection unit by Meta Materials 10, Meta Materials 10 are using its internal index distribution by electromagnetic wave with plane wave
Form is radiate.
As shown in figure 4, structural representations of the Fig. 4 for Meta Materials 10 in the present invention.Meta Materials 10 by N pieces metamaterial sheet with
And the reflecting plate being close in outermost layer metamaterial sheet is constituted, every layer of metamaterial sheet includes base material and the cycle is arranged in
Also include the coating being covered in artificial metal's micro-structural in multiple artificial metal's micro-structurals on base material, the present embodiment.Often
Layer metamaterial sheet thickness is identical, by the base material of 0.4 mm of thickness, the coating of 0.4 mm of thickness and 0.018 millimeters thick
Artificial metal's micro-structural of degree is constituted, i.e., every layer metamaterial sheet thickness is 0.818 millimeter.The material of base material and coating is optional
High polymer material, ceramic material, ferroelectric material, ferrite material etc. are taken, artificial metal's micro-structural can pass through etching, carve, electrograving
It is attached to etc. mode on base material.
In first to N layer of metamaterial sheet in i-th layer of metamaterial sheet, away from the folding at i-th layer of metamaterial sheet lower edge y
Penetrate rate distribution satisfaction：
Wherein,
In above formula, nmaxFor the largest refractive index value of the Meta Materials, nminFor the minimum refractive index value of the Meta Materials, λ
The electromagnetic wavelength radiated for the feed, d is the gross thickness of the Meta Materials, upper edges and institute of the px for the reflection unit
State the vertical range of Meta Materials, LRFor the reflection unit length, θrFor the reflection unit and horizontal line angle, floor functions
For downward bracket function.
Obtain after the index distribution of each metamaterial sheet, it is necessary to which the Meta Materials of each metamaterial sheet virtual grate are substantially single
Artificial metal's micro-structural of being arranged in member is artificial in each Meta Materials elementary cell to change the refractive index of Meta Materials elementary cell
The size of metal micro structure and topological pattern influence whether the refractive index value of Meta Materials elementary cell.Artificial gold on each layer
The topological pattern of category micro-structural and artificial metal's micro-structural on different layers can be the same or different, as long as the artificial gold
Category micro-structural causes the refractive index of its metamaterial unit adhered to meet the index distribution of metamaterial sheet.Artificial metal
The selection of micro-structural topology pattern and size can be realized by Computer Simulation, can also pass through artificial metal's micro-structural in foundation
Chosen in database.Each metamaterial sheet can require artificial metal's micro-structural required for selecting according to the index distribution of itself
Topological pattern and size.The topological diagram of several artificial metal's micro-structurals that can change Meta Materials elementary cell refractive index is discussed below
Case.
As shown in figure 5, Fig. 5 is preferable to change the first of Meta Materials elementary cell refractive index for that can produce response to electromagnetic wave
The topological pattern of the geometry of artificial metal's micro-structural of embodiment.
Fig. 5 show the schematic diagram of the metal micro structure of plane flakes, and the metal micro structure of described flakes has
It is mutually perpendicular to the first metal wire J1 and the second the metal wire J2, the first metal wire J1 and the second metal wire J2 divided equally length
Identical, the first metal wire J1 two ends are connected with two first metal branch F1, the first metal wire J1 of equal length
Two ends are connected on two the first metal branch F1 midpoint, and the second metal wire J2 two ends are connected with two of equal length
Second metal branch F2, the second metal wire J2 two ends are connected on two the second metal branch F2 midpoint, and described first
Metal branch F1 and the second metal branch F2 equal length.
Fig. 6 is a kind of derived structure of the metal micro structure of the plane flakes shown in Fig. 5.It is in each first metal point
Branch F1 and each second metal branch F2 two ends are respectively connected with identical 3rd metal branch F3, and the corresponding 3rd
End points of the metal branch F3 midpoint respectively with the first metal branch F1 and the second metal branch F2 is connected.The rest may be inferred, this hair
It is bright to derive the metal micro structure of other forms.
Fig. 7 is a kind of distressed structure of the metal micro structure of the plane flakes shown in Fig. 5, the micro- knot of metal of such a structure
Structure, the first metal wire J1 and the second metal wire J2 are not straight lines, but folding line, and the first metal wire J1 and the second metal wire J2 are equal
Be provided with two kink WZ, but the first metal wire J1 and the second metal wire J2 be still it is vertical divide equally, pass through and bending be set
Relative position of the direction in portion with kink on the first metal wire and the second metal wire so that the metal micro structure shown in Fig. 7
All overlapped around perpendicular to the first metal wire with the figure that the axis of the second metal wire intersection point is rotated by 90 ° to any direction with artwork.
Furthermore it is also possible to have other deformations, for example, the first metal wire J1 and the second metal wire J2 are respectively provided with multiple kink WZ.
Determine after metal micro structure shape and index distribution, be described below in detail by the people in each metamaterial unit
The differentiation for making metal micro structure shape and size obtains the process of whole Meta Materials index distribution, and the process can pass through computer
Emulation is obtained, and is comprised the following steps that：
(1) the attachment base material of metal micro structure is determined.During this is bright, the base material and coating are compound using identical FR-4
Material is made, and described FR-4 composites are made with a predetermined dielectric constant, and such as dielectric constant is 3.3 FR-4
Composite.
(2) size of metamaterial unit is determined.The size of the size of metamaterial unit is obtained by the centre frequency of antenna, profit
Obtain its wavelength with frequency, then take 1/5th numerical value less than wavelength as metamaterial unit D length CD with it is wide
Spend KD.In the present invention, the metamaterial unit D is that long CD as shown in Figure 1 and width KD is that 2.5mm, thickness HD are 0.818mm
Square platelet.
(3) material and topological structure of metal micro structure are determined.In the present invention, the material of metal micro structure is copper, metal
The topological structure of micro-structural is the metal micro structure of the plane flakes shown in Fig. 5, and its line width W is consistent everywhere；Topology herein
Structure, refers to the basic configuration that topology is developed.
(4) the topology parameter of metal micro structure is determined.As shown in figure 5, in the present invention, the metal of plane flakes is micro-
The topology parameter of structure includes the line width W, the first metal wire J1 of metal micro structure length a, the first metal branch F1's
Length b.
(5) the differentiation restrictive condition of the topology of metal micro structure is determined.In the present invention, the topological shape of metal micro structure
The differentiation restrictive condition of shape has, and the minimum spacing WL between metal micro structure is (i.e. as shown in figure 5, metal micro structure and Meta Materials
The long side of unit or the distance of broadside are WL/2), the line width W of metal micro structure, the size of metamaterial unit；Due to processing technology
Limitation, WL is more than or equal to 0.1mm, equally, and line width W is also intended to be more than or equal to 0.1mm.In the present invention, WL takes 0.1mm, W to take
0.3mm, the size of metamaterial unit is long and a width of 2.5mm, and thickness is 0.818mm, now the topology of metal micro structure
Parameter only has two variables of a and b.The topology of metal micro structure pass through the differentiation mode as shown in Fig. 8 to Fig. 9, correspondence
In a certain specific frequency (such as 12.225GHZ), a continuous variations in refractive index scope can be obtained.
Specifically, including two stages, (it is basic that topology is developed for the differentiation of the topology of the metal micro structure
It is shaped as the metal micro structure shown in Fig. 5)：
First stage：According to restrictive condition is developed, in the case where b values keep constant, a values are changed to most from minimum value
Metal micro structure in big value, this evolution process is " ten " font when minimum value (a take except).In the present embodiment, a minimum
Value is 0.3mm (line width W), and a maximum is (CD-WL), i.e. 2.5-0.1mm, then a maximum is 2.4mm.Therefore, exist
In first stage, the differentiation of the topology of metal micro structure is as shown in fig. 7, i.e. from the square JX1 that the length of side is W, gradually drill
Become maximum " ten " font topology JD1, in maximum " ten " font topology JD1, the first metal wire J1 and the
Two metal wire J2 length are 2.4mm, and width W is 0.3mm.In the first phase, with the topology of metal micro structure
Differentiation, the refractive index of corresponding metamaterial unit continuously increases ((specific frequency of respective antenna one), when frequency is
During 12.225GHZ, the minimum value n of the corresponding refractive index of metamaterial unitminFor 1.85.
Second stage：According to restrictive condition is developed, when a increases to maximum, a keeps constant；Now, by b from minimum
Value increases continuously maximum, and the metal micro structure in this evolution process is plane flakes.In the present embodiment, b minimum
Value is 0.3mm (line width W), and b maximum is (CD-WL-2W), i.e. 2.5-0.1-2*0.3mm, then b maximum is
1.8mm.Therefore, in second stage, the differentiation of the topology of metal micro structure is as shown in figure 8, i.e. from maximum " ten " word
Shape topology JD1, is gradually evolved into the topology JD2 of the plane flakes of maximum, maximum plane flakes herein
Topology JD2 refer to that the first metal branch J1 and the second metal branch J2 length b can not extend again, otherwise
One metal branch will intersect with the second metal branch, and b maximum is 1.8mm.Now, the first metal wire and the second metal
Line length is 2.4mm, and width is 0.3mm, and the length of the first metal branch and the second metal branch is 1.8mm, width
For 0.3mm.In second stage, with the differentiation of the topology of metal micro structure, the folding of corresponding metamaterial unit
Penetrate rate and continuously increase (specific frequency of respective antenna one), when frequency is 12.225GHZ, the corresponding refractive index of metamaterial unit
Maximum nmaxFor 6.
The variations in refractive index scope (1.85-6) for obtaining metamaterial unit by above-mentioned differentiation meets design needs.If on
State and develop the variations in refractive index scope for obtaining metamaterial unit and be unsatisfactory for designing needs, such as maximum is too small, then change WL and
W, is emulated again, the variations in refractive index scope until obtaining our needs.
After the index distribution for obtaining Meta Materials, due to the length L of reflection unitR, reflection unit and horizontal angle
θr, the upper edge of reflection unit and the vertical range px of Meta Materials, electromagnetic horn axis and horizontal line angle theta to it is final partially
The far field maximum of feedback microwave antenna system has an impact with half-power bandwidth, is tested below by Multi simulation running, optimal to obtain
Span.
In test, the wave frequency of feed radiation is 12.225G hertz, and Meta Materials are using seven layers of metamaterial sheet and instead
Plate composition is penetrated, the variations in refractive index scope of Meta Materials is 1.85-6.
Emulation testing one：
In the case where px is 0.5 meter and 0.65 meter of fixed value, the length L of different reflection units is testedR, reflection unit
With horizontal angle thetarAnd the obtained far field maximum of electromagnetic horn axis and horizontal line angle theta and half-power bandwidth.
Test result such as following table：
Px is 0.5 meter：
| θ | θr | Px [rice] | LR[rice] | Far field maximum | Half-power bandwidth |
| 7° | 63° | 0.5 | 0.3 | 83.0117dB | 1.7521° |
| 8° | 63° | 0.5 | 0.3 | 83.2202dB | 1.7561° |
| 9° | 63° | 0.5 | 0.3 | 83.2889dB | 1.7494° |
| 10° | 63° | 0.5 | 0.3 | 83.4255dB | 1.7481° |
| 11° | 63° | 0.5 | 0.3 | 83.6042dB | 1.7477° |
| 12° | 63° | 0.5 | 0.3 | 83.7061dB | 1.7518° |
| 7° | 64° | 0.5 | 0.3 | 83.2231dB | 1.5135° |
| 8° | 64° | 0.5 | 0.3 | 83.2673dB | 1.5174° |
| 9° | 64° | 0.5 | 0.3 | 83.2978dB | 1.5230° |
| 10° | 64° | 0.5 | 0.3 | 83.3292dB | 1.5299° |
| 11° | 64° | 0.5 | 0.3 | 83.3098dB | 1.5307° |
| 12° | 64° | 0.5 | 0.3 | 83.2927dB | 1.5373° |
| 7° | 65° | 0.5 | 0.3 | 80.0005dB | 1.5995° |
| 8° | 65° | 0.5 | 0.3 | 79.8721dB | 1.5963° |
| 9° | 65° | 0.5 | 0.3 | 79.7523dB | 1.6044° |
| 10° | 65° | 0.5 | 0.3 | 79.6254dB | 1.6101° |
| 11° | 65° | 0.5 | 0.3 | 79.5313dB | 1.6114° |
| 12° | 65° | 0.5 | 0.3 | 79.3926dB | 1.6198° |
| 7° | 66° | 0.5 | 0.3 | 82.6592dB | 2.5584° |
| 8° | 66° | 0.5 | 0.3 | 82.8046dB | 2.5457° |
| 9° | 66° | 0.5 | 0.3 | 82.9769dB | 2.5362° |
| 10° | 66° | 0.5 | 0.3 | 83.1435dB | 2.5241° |
| 11° | 66° | 0.5 | 0.3 | 83.2031dB | 2.5078° |
| 12° | 66° | 0.5 | 0.3 | 83.3884dB | 2.5043° |
| 7° | 63° | 0.5 | 0.4 | 82.9929dB | 1.7188° |
| 8° | 63° | 0.5 | 0.4 | 83.1209dB | 1.7176° |
| 9° | 63° | 0.5 | 0.4 | 83.3255dB | 1.7169° |
| 10° | 63° | 0.5 | 0.4 | 83.4414dB | 1.7164° |
| 11° | 63° | 0.5 | 0.4 | 83.5056dB | 1.7082° |
| 12° | 63° | 0.5 | 0.4 | 83.6143dB | 1.7085° |
| 7° | 64° | 0.5 | 0.4 | 83.3293dB | 1.4959° |
| 8° | 64° | 0.5 | 0.4 | 83.3945dB | 1.5000° |
| 9° | 64° | 0.5 | 0.4 | 83.3982dB | 1.5026° |
| 10° | 64° | 0.5 | 0.4 | 83.3968dB | 1.5010° |
| 11° | 64° | 0.5 | 0.4 | 83.3755dB | 1.5062° |
| 12° | 64° | 0.5 | 0.4 | 83.4033dB | 1.5090° |
| 7° | 65° | 0.5 | 0.4 | 79.9909dB | 1.5875° |
| 8° | 65° | 0.5 | 0.4 | 79.8795dB | 1.5897° |
| 9° | 65° | 0.5 | 0.4 | 79.7885dB | 1.5931° |
| 10° | 65° | 0.5 | 0.4 | 79.6795dB | 1.5978° |
| 11° | 65° | 0.5 | 0.4 | 79.5637dB | 1.5998° |
| 12° | 65° | 0.5 | 0.4 | 79.4760dB | 1.6065° |
Px is 0.65 meter：
| θ | θr | Px [rice] | LR[rice] | Far field maximum | Half-power bandwidth |
| 7° | 63° | 0.65 | 0.4 | 84.5376dB | 1.5499° |
| 8° | 63° | 0.65 | 0.4 | 84.7050dB | 1.5387° |
| 9° | 63° | 0.65 | 0.4 | 84.8566dB | 1.5283° |
| 10° | 63° | 0.65 | 0.4 | 84.9738dB | 1.5198° |
| 11° | 63° | 0.65 | 0.4 | 85.0570dB | 1.5119° |
| 12° | 63° | 0.65 | 0.4 | 85.1034dB | 1.5055° |
| 13° | 63° | 0.65 | 0.4 | 85.1394dB | 1.4995° |
| 14° | 63° | 0.65 | 0.4 | 85.1527dB | 1.4938° |
| 15° | 63° | 0.65 | 0.4 | 85.1385dB | 1.4873° |
| 16° | 63° | 0.65 | 0.4 | 85.0862dB | 1.4833° |
| 17° | 63° | 0.65 | 0.4 | 85.0266dB | 1.4800° |
| 18° | 63° | 0.65 | 0.4 | 84.9428dB | 1.4761° |
| 7° | 64° | 0.65 | 0.4 | 84.2464dB | 1.3299° |
| 8° | 64° | 0.65 | 0.4 | 84.3101dB | 1.3331° |
| 9° | 64° | 0.65 | 0.4 | 84.3543dB | 1.3367° |
| 10° | 64° | 0.65 | 0.4 | 84.3851dB | 1.3401° |
| 11° | 64° | 0.65 | 0.4 | 84.3938dB | 1.3443° |
| 12° | 64° | 0.65 | 0.4 | 84.3955dB | 1.3483° |
| 13° | 64° | 0.65 | 0.4 | 84.3642dB | 1.3538° |
| 14° | 64° | 0.65 | 0.4 | 84.3325dB | 1.3583° |
| 15° | 64° | 0.65 | 0.4 | 84.2667dB | 1.3622° |
| 16° | 64° | 0.65 | 0.4 | 84.1765dB | 1.3669° |
| 17° | 64° | 0.65 | 0.4 | 84.0647dB | 1.3717° |
| 18° | 64° | 0.65 | 0.4 | 83.9447dB | 1.3763° |
| 7° | 65° | 0.65 | 0.4 | 80.9765dB | 1.6054° |
| 8° | 65° | 0.65 | 0.4 | 80.9026dB | 1.6087° |
| 9° | 65° | 0.65 | 0.4 | 80.8284dB | 1.6103° |
| 10° | 65° | 0.65 | 0.4 | 80.7358dB | 1.6122° |
| 11° | 65° | 0.65 | 0.4 | 80.6697dB | 1.6139° |
| 12° | 65° | 0.65 | 0.4 | 80.5815dB | 1.6154° |
| 13° | 65° | 0.65 | 0.4 | 80.5003dB | 1.6158° |
| 14° | 65° | 0.65 | 0.4 | 80.4201dB | 1.6180° |
| 15° | 65° | 0.65 | 0.4 | 80.3351dB | 1.6204° |
| 16° | 65° | 0.65 | 0.4 | 80.2478dB | 1.6217° |
| 17° | 65° | 0.65 | 0.4 | 80.1697dB | 1.6226° |
| 18° | 65° | 0.65 | 0.4 | 80.1028dB | 1.6253° |
From above-mentioned test result, reflection unit and horizontal line angle thetar, electromagnetic horn axis and horizontal line angle
θ, the influence to final result is maximum, and the length L of reflection unitRSmaller is influenceed on final result.
Emulation testing two：
Px is fixed as 0.35 meter, electromagnetic horn axis is fixed as 7 ° with horizontal line angle theta, tests different θrTo final
As a result influence.Test result is as follows：
| θ | θr | Px [rice] | LR[rice] | Far field maximum | Half-power bandwidth |
| 7° | 46° | 0.35 | 0.4 | 79.1601dB | 1.4051° |
| 7° | 47° | 0.35 | 0.4 | 81.6566dB | 1.2281° |
| 7° | 48° | 0.35 | 0.4 | 81.0315dB | 1.3184° |
| 7° | 49° | 0.35 | 0.4 | 80.6151dB | 1.3101° |
| 7° | 50° | 0.35 | 0.4 | 83.0175dB | 1.2060° |
| 7° | 51° | 0.35 | 0.4 | 81.7014dB | 1.3452° |
| 7° | 52° | 0.35 | 0.4 | 81.9462dB | 1.3467° |
| 7° | 53° | 0.35 | 0.4 | 84.0913dB | 1.2626° |
| 7° | 54° | 0.35 | 0.4 | 81.1962dB | 1.3803° |
| 7° | 55° | 0.35 | 0.4 | 83.2773dB | 1.5064° |
| 7° | 56° | 0.35 | 0.4 | 83.9867dB | 1.3258° |
| 7° | 57° | 0.35 | 0.4 | 81.3767dB | 1.3824° |
| 7° | 58° | 0.35 | 0.4 | 83.3840dB | 1.6194° |
| 7° | 59° | 0.35 | 0.4 | 82.3159dB | 1.5046° |
| 7° | 60° | 0.35 | 0.4 | 83.4449dB | 1.5602° |
| 7° | 61° | 0.35 | 0.4 | 79.8453dB | 1.7010° |
| 7° | 62° | 0.35 | 0.4 | 83.4186dB | 2.2021° |
| 7° | 63° | 0.35 | 0.4 | 81.1110dB | 2.3058° |
| 7° | 64° | 0.35 | 0.4 | 82.0067dB | 1.9666° |
Emulation testing three：
Px is fixed as 0.35 meter, reflection unit and horizontal line angle thetar50 ° and 53 ° are fixed as, different θ pairs are tested respectively
Final result influences.Test result is as follows：
θrFor 50 ° when：
| θ | θr | Px [rice] | LR[rice] | Far field maximum | Half-power bandwidth |
| 7° | 50° | 0.35 | 0.3 | 83.0175dB | 1.2060° |
| 8° | 50° | 0.35 | 0.3 | 83.1486dB | 1.2138° |
| 9° | 50° | 0.35 | 0.3 | 83.3004dB | 1.2184° |
| 10° | 50° | 0.35 | 0.3 | 83.4670dB | 1.2207° |
| 11° | 50° | 0.35 | 0.3 | 83.5856dB | 1.2264° |
| 12° | 50° | 0.35 | 0.3 | 83.7237dB | 1.2323° |
| 13° | 50° | 0.35 | 0.3 | 83.8064dB | 1.2379° |
| 14° | 50° | 0.35 | 0.3 | 83.9337dB | 1.2461° |
| 15° | 50° | 0.35 | 0.3 | 84.0313dB | 1.2508° |
| 16° | 50° | 0.35 | 0.3 | 84.1153dB | 1.2547° |
| 17° | 50° | 0.35 | 0.3 | 84.1575dB | 1.2634° |
| 18° | 50° | 0.35 | 0.3 | 84.2385dB | 1.2696° |
| 19° | 50° | 0.35 | 0.3 | 84.2802dB | 1.2755° |
| 20° | 50° | 0.35 | 0.3 | 84.2600dB | 1.2843° |
θrFor 53 ° when：
| θ | θr | Px [rice] | LR[rice] | Half-power bandwidth | Far field maximum |
| 7° | 53° | 0.35 | 0.3 | 84.0913dB | 1.2626° |
| 8° | 53° | 0.35 | 0.3 | 84.2044dB | 1.2667° |
| 9° | 53° | 0.35 | 0.3 | 84.3689dB | 1.2717° |
| 10° | 53° | 0.35 | 0.3 | 84.4843dB | 1.2761° |
| 11° | 53° | 0.35 | 0.3 | 84.6113dB | 1.2801° |
| 12° | 53° | 0.35 | 0.3 | 84.7177dB | 1.2849° |
| 13° | 53° | 0.35 | 0.3 | 84.8160dB | 1.2891° |
| 14° | 53° | 0.35 | 0.3 | 84.8955dB | 1.2946° |
| 15° | 53° | 0.35 | 0.3 | 84.9825dB | 1.3026° |
| 16° | 53° | 0.35 | 0.3 | 85.0213dB | 1.3089° |
| 17° | 53° | 0.35 | 0.3 | 85.1002dB | 1.3120° |
| 18° | 53° | 0.35 | 0.3 | 85.1251dB | 1.3189° |
| 19° | 53° | 0.35 | 0.3 | 85.1479dB | 1.3247° |
| 20° | 53° | 0.35 | 0.3 | 85.1368dB | 1.3292° |
Emulation testing four：
Px is fixed as 0.35 meter, θr50 °, when θ is fixed as 10 ° are fixed as, different reflection unit length L are testedRTo final
As a result influence, test result is as follows：
| θ | θr | Px [rice] | LR[rice] | Far field maximum | Half-power bandwidth |
| 10° | 50° | 0.35 | 0.2 | 82.6126dB | 1.3218° |
| 10° | 50° | 0.35 | 0.21 | 83.0002dB | 1.2649° |
| 10° | 50° | 0.35 | 0.22 | 83.3054dB | 1.2322° |
| 10° | 50° | 0.35 | 0.23 | 83.3188dB | 1.2442° |
| 10° | 50° | 0.35 | 0.24 | 83.3500dB | 1.2504° |
| 10° | 50° | 0.35 | 0.26 | 83.6147dB | 1.2089° |
| 10° | 50° | 0.35 | 0.28 | 83.4737dB | 1.2208° |
| 10° | 50° | 0.35 | 0.3 | 83.4670dB | 1.2207° |
Emulation testing five：
Px is fixed as 0.35 meter, θr50 °, when θ is fixed as 16 ° are fixed as, different reflection unit length L are testedRTo final
As a result influence, test result is as follows：
| θ | θr | Px [rice] | LR[rice] | Far field maximum | Half-power bandwidth |
| 16° | 50° | 0.35 | 0.2 | 82.6652dB | 1.3756° |
| 16° | 50° | 0.35 | 0.21 | 83.2451dB | 1.2974° |
| 16° | 50° | 0.35 | 0.22 | 83.6839dB | 1.2671° |
| 16° | 50° | 0.35 | 0.23 | 83.7873dB | 1.2829° |
| 16° | 50° | 0.35 | 0.24 | 83.8983dB | 1.2887° |
| 16° | 50° | 0.35 | 0.26 | 84.3210dB | 1.2391° |
| 16° | 50° | 0.35 | 0.28 | 84.1879dB | 1.2505° |
| 16° | 50° | 0.35 | 0.3 | 84.1153dB | 1.2547° |
Emulation testing six：
Px is fixed as 0.35 meter, θr50 °, when θ is fixed as 12 ° are fixed as, different reflection unit length L are testedRTo final
As a result influence, test result is as follows：
| θ | θr | Px [rice] | LR[rice] | Far field maximum | Half-power bandwidth |
| 12° | 53° | 0.35 | 0.2 | 83.7087dB | 1.3365° |
| 12° | 53° | 0.35 | 0.21 | 84.2054dB | 1.3004° |
| 12° | 53° | 0.35 | 0.22 | 84.4372dB | 1.2939° |
| 12° | 53° | 0.35 | 0.23 | 84.5693dB | 1.3047° |
| 12° | 53° | 0.35 | 0.24 | 84.7735dB | 1.2935° |
| 12° | 53° | 0.35 | 0.25 | 84.9283dB | 1.2703° |
| 12° | 53° | 0.35 | 0.26 | 84.9100dB | 1.2689° |
| 12° | 53° | 0.35 | 0.27 | 84.8081dB | 1.2830° |
| 12° | 53° | 0.35 | 0.28 | 84.7479dB | 1.2722° |
| 12° | 53° | 0.35 | 0.29 | 84.7191dB | 1.2738° |
| 12° | 53° | 0.35 | 0.3 | 84.7177dB | 1.2849° |
Via above-mentioned test, final optimal case of choosing is：Reflection unit and horizontal line angle thetarFor 53 °, reflection unit
Length LRFor 0.25 meter, electromagnetic horn axis is 12 ° with horizontal line angle theta, the upper edge of reflection unit and Meta Materials
Vertical range px is 0.35 meter.The far field analogous diagram of the program is as shown in Figure 10.Its far field maximum is 84.8283dB, half work(
A width of 1.2703 ° of rate band.It was found from simulation result, partial feedback microwave antenna system far field value of the present invention and half-power bandwidth performance are all
Extremely outstanding, while using Meta Materials modulated electromagnetic wave, its thinner thickness, cost are relatively low, it is simple to prepare, and Meta Materials are flat board
Shape, space-consuming is few, is easy to place and transports.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within the protection of the present invention.
Claims (9)
1. a kind of partial feedback microwave antenna system, it is characterised in that：Feed and reflection including Meta Materials, below Meta Materials
Device, the reflection unit and horizontal line are into θrOverturning angle is placed, the Meta Materials by first to n-th layer metamaterial sheet and
The reflecting plate for being close to n-th layer metamaterial sheet is constituted, and every layer of metamaterial sheet is included on base material and cycle arrangement base material
Multiple artificial metal's micro-structurals；The electromagnetic wave of the feed radiation reflexes to the Meta Materials by the reflection unit, described super
Electromagnetic wave is radiate by material in plane wave form；Described first into n-th layer metamaterial sheet i-th layer of metamaterial sheet
On, met away from the index distribution at i-th layer of metamaterial sheet lower edge y：
Wherein,
In above formula, nmaxFor the largest refractive index value of the Meta Materials, nminFor the minimum refractive index value of the Meta Materials, λ is institute
The electromagnetic wavelength of feed radiation is stated, d is the gross thickness of the Meta Materials, and px surpasses for the upper edge of the reflection unit with described
The vertical range of material, LRFor the reflection unit length, θrFor the reflection unit and horizontal line angle, floor functions be to
Lower bracket function.
2. partial feedback microwave antenna system as claimed in claim 1, it is characterised in that：The feed is electromagnetic horn, the loudspeaker
The axis of antenna and horizontal angle are θ.
3. partial feedback microwave antenna system as claimed in claim 1, it is characterised in that：Artificial metal's micro-structural is avenged in plane
Flower-shaped, artificial metal's micro-structural has the first metal wire and the second metal wire for being mutually perpendicular to divide equally, first metal
Line is identical with the length of the second metal wire, and the first metal wire two ends are connected with two the first metal branch of equal length,
The first metal wire two ends are connected on the midpoint of two the first metal branch, and the second metal wire two ends are connected with identical
Two the second metal branch of length, the second metal wire two ends are connected on the midpoint of two the second metal branch, described
The equal length of first metal branch and the second metal branch.
4. partial feedback microwave antenna system as claimed in claim 3, it is characterised in that：The metal micro structure of the plane flakes
The first metal wire and the second metal wire be provided with two kinks, the metal micro structure of the plane flakes around perpendicular to
The figure that first metal wire is rotated by 90 ° with the axis of the second metal wire intersection point to any direction is all overlapped with artwork.
5. partial feedback microwave antenna system as claimed in claim 2, it is characterised in that：The reflection unit upper edge surpasses with described
The vertical range of material is 0.5 meter to 0.65 meter, and the reflection unit and horizontal angle are 63 ° to 66 °, the reflection dress
It is 0.3 to 0.4 meter to put length, and the electromagnetic horn axis and horizontal angle are 7 ° to 12 °.
6. partial feedback microwave antenna system as claimed in claim 2, it is characterised in that：The reflection unit upper edge surpasses with described
The vertical range of material is 0.35 meter, and the electromagnetic horn and horizontal line angle are 7 °, the reflection unit and horizontal folder
Angle is 46 ° to 64 °.
7. partial feedback microwave antenna system as claimed in claim 2, it is characterised in that：The reflection unit upper edge surpasses with described
The vertical range of material is 0.35 meter, and the reflection unit and horizontal angle are 50 ° to 53 °, the electromagnetic horn and water
The angle of horizontal line is 7 ° to 20 °.
8. partial feedback microwave antenna system as claimed in claim 7, it is characterised in that：The reflection unit upper edge surpasses with described
The vertical range of material is 0.35 meter, and the reflection unit and horizontal angle are 50 ° to 53 °, the electromagnetic horn and water
The angle of horizontal line is 10 ° to 16 °, and the reflection unit length is 0.2 meter to 0.3 meter.
9. partial feedback microwave antenna system as claimed in claim 2, it is characterised in that：The reflection unit is with horizontal line angle
53 °, the length of the reflection unit is 0.25 meter, and the electromagnetic horn axis and horizontal line angle are 12 °, the reflection dress
The upper edge put and the vertical range of Meta Materials are 0.35 meter.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5859619A (en) * | 1996-10-22 | 1999-01-12 | Trw Inc. | Small volume dual offset reflector antenna |
| CN101103489A (en) * | 2004-11-19 | 2008-01-09 | 惠普开发有限公司 | Composite material with controllable resonant cells |
| CN101505004A (en) * | 2009-03-05 | 2009-08-12 | 四川大学 | High gain slot array antenna based on left-hand material |
| EP2375496A1 (en) * | 2010-04-12 | 2011-10-12 | ETH Zurich | Absorber for electromagnetic radiation |
-
2012
- 2012-02-29 CN CN201210051019.XA patent/CN103296486B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5859619A (en) * | 1996-10-22 | 1999-01-12 | Trw Inc. | Small volume dual offset reflector antenna |
| CN101103489A (en) * | 2004-11-19 | 2008-01-09 | 惠普开发有限公司 | Composite material with controllable resonant cells |
| CN101505004A (en) * | 2009-03-05 | 2009-08-12 | 四川大学 | High gain slot array antenna based on left-hand material |
| EP2375496A1 (en) * | 2010-04-12 | 2011-10-12 | ETH Zurich | Absorber for electromagnetic radiation |
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