CN102810764A - Offset horn antenna system - Google Patents

Abstract

The invention discloses an offset horn antenna system. The offset horn antenna system comprises a horn antenna, a reflection unit arranged on one side of the horn antenna, a flat meta-material arranged on the other side of the horn antenna, wherein the flat meta-material is adhered with a reflection surface on one side surface far from the horn antenna; the flat meta-material comprises a base material and a plurality of manmade micro structures which are arranged on the base material; the electromagnetic wave radiated by the horn antenna is reflected to the flat meta-material by the reflection unit, reflected by the reflection surface, and then radiated out from the flat meta-material in the form of plane electromagnetic wave. The offset horn antenna system uses the meta-material principle to prepare the flat meta-material, can convert the spherical electromagnetic wave radiated by a feeder source to be planar electromagnetic wave suitable for long-distance transmission, so that the size of the offset antenna system and the weight of the offset antenna system are reduced. Furthermore, the offset horn antenna system is further provided with the reflection unit for reflecting the electromagnetic wave radiated by the feeder source to the flat meta-material, thereby further reducing the size of the offset antenna system.

Description

A kind of offset-fed horn antenna system

Technical field

The present invention relates to a kind of horn antenna system, relate in particular to a kind of offset-fed horn antenna system.

Background technology

Existing offset-fed antenna system is made up of the reflecting surface of feed and parabolic shape.The focus of the reflecting surface of offset-fed antenna is not in the reflecting surface centermost, so the installation site of feed also deviates from the axis of reflecting surface.The reflecting surface of parabolic shape converges to feed with the electromagnetic wave of outside or the form that the electromagnetic wave of feed emission converts plane wave into is radiate.The area of parabolic reflector with and machining accuracy directly determined the parameters of offset-fed antenna, for example gain, directivity etc.

The reflecting surface of parabolic shape brings various defectives, and for example: paraboloidal requirement on machining accuracy is too high, windage is excessive, volume and weight is high excessively.

Summary of the invention

Technical problem to be solved by this invention is, to the above-mentioned deficiency of prior art, proposes a kind of flat reflective face that utilizes ultra material principle preparation, and the offset-fed horn antenna system that this flat reflective face is combined with horn antenna.The reflecting surface of offset-fed horn antenna of the present invention system has been broken through the reflecting surface restriction of traditional parabolic shape, has thin thickness, in light weight, advantage such as requirement on machining accuracy is low.

The technical scheme that the present invention solves its technical problem employing is; A kind of offset-fed horn antenna system is proposed; It comprises horn antenna, is arranged at the reflection unit of horn antenna one side; Be arranged at the ultra material of flat board of horn antenna opposite side, be pasted with reflecting surface on the side surface away from horn antenna on the ultra material of said flat board; The ultra material of said flat board comprises base material and is arranged in a plurality of artificial micro-structural on the base material; The electromagnetic wave of said horn antenna radiation reflects through the reflection unit face that is reflected behind the dull and stereotyped ultra material of reflexing to and radiate from the ultra material of flat board with the form of plane electromagnetic wave.

Further, be that initial point is set up the XY coordinate system with the ultra material central point of flat board, any point on the dull and stereotyped ultra material (x, refractive index n y) (x y) can obtain through following formula:

$n(x,y)=n_{\max }-\frac{\mathrm{route}-v_{\mathrm{seg}}}{d};---\left(1\right)$

route＝route ₁+route ₂；(2)

$r{\mathrm{oute}}_1=\sqrt{{\mathrm{<figure-callout\; id="2"\; label="dis"\; filenames="HSA00000757441500011.png,HSA00000757441500041.png"\; state="\{\{state\}\}">dis</figure-callout>}}^2+{(r-r_0)}^2};---\left(3\right)$

${\mathrm{<figure-callout\; id="2"\; label="route"\; filenames="HSA00000757441500011.png,HSA00000757441500041.png"\; state="\{\{state\}\}">route</figure-callout>}}_2=(\frac{\mathrm{dia}}{2}-r)\cos \left(\mathrm{\&alpha;}\right);---\left(4\right)$

r＝xcos(α)+ysin(α)；(6)

r ₀＝x ₀cos(α)+y ₀sin(α)；(7)

$\mathrm{dia}=\frac{L}{\sin \left(\mathrm{\&alpha;}\right)};---\left(8\right)$

ν _seg＝ss+λ×num _seg；(9)

${\mathrm{num}}_{\mathrm{seg}}=\mathrm{floor}\left(\frac{\mathrm{route}-\mathrm{ss}}{\mathrm{\&lambda;}}\right);---\left(11\right)$

$d=\frac{\mathrm{\&lambda;}}{n_{\max }-n_{\min }};---\left(12\right)$

x ₀＝D _m×cos(θ)；(13)

y ₀＝D _m×sin(θ)；(14)

Above-mentioned formula (1) is to formula (14), and α is the angle of dull and stereotyped ultra material and horizontal plane,

Be the angle of virtual horn antenna and horizontal plane, D _mBe the vertical range of virtual horn antenna with dull and stereotyped ultra material, L is the length of dull and stereotyped ultra material, n _MaxBe the largest refractive index value of the ultra material of flat board, λ is the electromagnetic wavelength of horn antenna radiation; Said virtual horn antenna and said horn antenna are that symmetry axis is symmetrically distributed with said reflection unit.

Further; Said artificial metal's micro-structural is the plane flakes; Said artificial metal's micro-structural has first metal wire and second metal wire of vertically dividing equally each other, and said first metal wire is identical with the length of second metal wire, and the said first metal wire two ends are connected with two first metal branches of equal length; The said first metal wire two ends are connected on the mid point of two first metal branches; The said second metal wire two ends are connected with two second metal branches of equal length, and the said second metal wire two ends are connected on the mid point of two second metal branches, the equal in length of the said first metal branch and the second metal branch.

Further; First metal wire of the alabastrine metal micro structure in said plane and second metal wire are provided with two kinks, and the alabastrine metal micro structure in said plane winds and revolves the figure that turn 90 degrees with the axis of the second metal wire intersection point to any direction perpendicular to first metal wire and all overlap with former figure.

Further; Each the first metal branch of the alabastrine artificial metal's micro-structural in said plane and the two ends of each second metal branch also are connected with identical the 3rd metal branch, and the mid point of corresponding the 3rd metal branch links to each other with the end points of the first metal branch and the second metal branch respectively.

Further; The vertical range of virtual horn antenna and dull and stereotyped ultra material is that 0.45 to 0.55 meter, virtual horn antenna are 74 ° to 92 ° with the angle of horizontal plane, is 0.112 to 0.15 meter near the vertical range at an end edge of horn antenna on horn antenna and the ultra material of flat board.

Further, the vertical range of virtual horn antenna and dull and stereotyped ultra material is that 0.5 meter, virtual horn antenna are 86 ° with the angle of horizontal plane, is 0.15 meter near the vertical range at an end edge of horn antenna on horn antenna and the ultra material of flat board.

Further; Said a plurality of artificial metal's micro-structural is that the basic configuration differentiation obtains with plane flakes metal micro structure; Plane flakes metal micro structure comprises first metal wire and second metal wire of vertically dividing equally each other; Said first metal wire is identical with the length of second metal wire; The said first metal wire two ends are connected with two first metal branches of equal length, and the said first metal wire two ends are connected on the mid point of two first metal branches, and the said second metal wire two ends are connected with two second metal branches of equal length; The said second metal wire two ends are connected on the mid point of two second metal branches, the equal in length of the said first metal branch and the second metal branch; The differentiation mode is: (1) forms first metal wire and second metal wire from the square-shaped metal piece to its four limits growing metal, and first metal wire and second metal wire grow into maximum gradually; (2) first metal wires and second metal wire grow into after the maximum from the first metal wire two ends and grow respectively in the second metal wire two ends first metal branch and the second metal branch, the first metal branch and the second metal branch grow into maximum gradually.

Further, said base material adopts FR-4 material, ceramic material, ferroelectric material, ferrite material or PS material to process.

Further, said metal micro structure through etching, bore quarter, electrograving or ion mode at quarter and be arranged in substrate surface.

The present invention passes through to utilize the dull and stereotyped ultra material of ultra material principle preparation, and it can convert the sphere electromagnetic wave of feed radiation into the plane electromagnetic wave transmission that is suitable for long-distance transmissions, can reduce the volume of offset-fed antenna system, the weight of reduction offset-fed antenna system.Further, the present invention also is provided with reflection unit with the ultra material of reflection of electromagnetic wave to flat board with the feed radiation, has further reduced the volume of offset-fed antenna system.

Description of drawings

Fig. 1 is the perspective view of the elementary cell of the ultra material of formation;

Fig. 2 is the structural representation of offset-fed horn antenna of the present invention system;

Fig. 3 is the calculating sketch map of offset-fed horn antenna of the present invention system;

Fig. 4 is the sketch map of the alabastrine metal micro structure in plane of the present invention;

Fig. 5 is a kind of derived structure of the alabastrine metal micro structure in plane shown in Figure 4;

Fig. 6 is a kind of distressed structure of the alabastrine metal micro structure in plane shown in Figure 4;

Fig. 7 is the phase I that the topology of the alabastrine metal micro structure in plane develops;

Fig. 8 is the second stage that the topology of the alabastrine metal micro structure in plane develops.

Embodiment

Light, as electromagnetic a kind of, it is when passing glass; Because the wavelength of light is much larger than the size of atom; Therefore can use the univers parameter of glass, the details parameter of the atom of for example refractive index, rather than composition glass is described the response of glass to light.Accordingly, when research material was to other electromagnetic responses, any yardstick also can be used the univers parameter of material much smaller than the structure of electromagnetic wavelength to electromagnetic response in the material, and for example DIELECTRIC CONSTANTS and magnetic permeability μ describe.Thereby the structure through every of designing material makes all identical with magnetic permeability or different dielectric constant that makes material monolithic of the dielectric constant of material each point and magnetic permeability be certain rule and arranges; Magnetic permeability that rule is arranged and dielectric constant can make material that electromagnetic wave is had the response on the macroscopic view, for example converge electromagnetic wave, divergent electromagnetic ripple etc.Such has magnetic permeability that rule arranges and the material of dielectric constant is referred to as ultra material.

As shown in Figure 1, Fig. 1 is the perspective view of the elementary cell of the ultra material of formation.The elementary cell of ultra material comprises the base material 1 that artificial micro-structural 2 and this artificial micro-structural are adhered to.Among the present invention; Artificial micro-structural is artificial metal micro structure; Artificial metal's micro-structural has and can produce the plane or the three-dimensional topological structure of response to incident electromagnetic wave electric field and/or magnetic field, and the pattern and/or the size that change the artificial metal's micro-structural on each ultra material elementary cell can change the response of each ultra material elementary cell to incident electromagnetic wave.In a preferred embodiment, also can be coated with cover layer 3 on the artificial micro-structural 2, cover layer 3, artificial micro-structural 2 and base material 1 constitute the elementary cell of ultra material.A plurality of ultra material elementary cells are arranged according to certain rules and can be made ultra material electromagnetic wave had the response of macroscopic view.Because ultra material monolithic needs have macroscopical electromagnetic response so each ultra material elementary cell need form continuous response to the response of incident electromagnetic wave to incident electromagnetic wave; This size that requires each ultra material elementary cell is preferably 1/10th of incident electromagnetic wave wavelength less than 1/5th of incident electromagnetic wave wavelength.During this section is described; The artificial material monolithic that will surpass is divided into a plurality of ultra material elementary cells; But it is convenient to know that this kind division methods is merely description; Ultra material both can or assemble by a plurality of ultra material elementary cell splicings, also can artificial metal's micro-structural cycle was arranged on the base material and can constitute, and technology is simple and with low cost.Artificial metal's micro-structural that cycle arranges on each the ultra material elementary cell that promptly refers to above-mentioned artificial division can produce continuous electromagnetic response to incident electromagnetic wave.

The structural representation of offset-fed horn antenna of the present invention system is as shown in Figure 2.Offset-fed horn antenna of the present invention system comprises horn antenna 10, be arranged at the reflection unit 20 of horn antenna 10 1 sides, be arranged at the ultra material 30 of flat board of reflection unit 10 opposite sides, is pasted with reflecting surface 40 on the side surface of dull and stereotyped ultra material 30 away from horn antenna 10.The electromagnetic wave of horn antenna 10 radiation reflexes to through reflection unit 20 and is reflected that face 40 reflects behind the dull and stereotyped ultra material 30 and radiate from the ultra material 30 of flat board with the form of plane wave, and undulatory lines are electromagnetic wave among Fig. 2.

The calculating sketch map of offset-fed horn antenna system is as shown in Figure 3.The present invention has been owing to added reflection unit 20, so the electromagnetic wave of horn antenna 10 radiation is equivalent to the electromagnetic wave from virtual horn antenna 10 ' send.Virtual horn antenna 10 ' with horn antenna 10 be symmetry axis symmetry with reflection unit 20.Horn antenna 10 horizontal positioned, dull and stereotyped ultra material 30 tilts to place, and the angle of dull and stereotyped ultra material 30 and horizontal plane is designated as α, virtual horn antenna 10 ' be designated as with the angle of horizontal plane

Reflection unit 20 is designated as with the angle of horizontal plane The length of reflection unit 20 is designated as L _R, the length of dull and stereotyped ultra material 30 is designated as L, is designated as Y near the vertical range at an end edge of horn antenna 10 on horn antenna 10 and the ultra material 30 of flat board _L, virtual horn antenna 10 ' be designated as D with the vertical range of dull and stereotyped ultra material 30 _m

Ultra material 30 central point C (0,0) set up the XY coordinate system for initial point with flat board, the coordinate of horn antenna 10 be designated as (x ' ₀, y ' ₀), virtual horn antenna 10 ' coordinate be designated as (x ₀, y ₀), the coordinate of 20 two end points of reflection unit is respectively (px ₁, py ₁) and (px ₂, py ₂).

Any point on the dull and stereotyped ultra material (x, refractive index n y) (x y) can obtain through following formula:

$n(x,y)=n_{\max }-\frac{\mathrm{route}-v_{\mathrm{seg}}}{d};---\left(1\right)$

route＝route ₁+route ₂；(2)

$r{\mathrm{oute}}_1=\sqrt{{\mathrm{<figure-callout\; id="2"\; label="dis"\; filenames="HSA00000757441500011.png,HSA00000757441500041.png"\; state="\{\{state\}\}">dis</figure-callout>}}^2+{(r-r_0)}^2};---\left(3\right)$

${\mathrm{<figure-callout\; id="2"\; label="route"\; filenames="HSA00000757441500011.png,HSA00000757441500041.png"\; state="\{\{state\}\}">route</figure-callout>}}_2=(\frac{\mathrm{dia}}{2}-r)\cos \left(\mathrm{\&alpha;}\right);---\left(4\right)$

r＝x?cos(α)+y?sin(α)；(6)

r ₀＝x ₀cos(α)+y ₀sin(α)；(7)

$\mathrm{dia}=\frac{L}{\sin \left(\mathrm{\&alpha;}\right)};---\left(8\right)$

ν _seg＝ss+λ×num _seg；(9)

${\mathrm{num}}_{\mathrm{seg}}=\mathrm{floor}\left(\frac{\mathrm{route}-\mathrm{ss}}{\mathrm{\&lambda;}}\right);---\left(11\right)$

$d=\frac{\mathrm{\&lambda;}}{n_{\max }-n_{\min }};---\left(12\right)$

x ₀＝D _m×cos(θ)；(13)

y ₀＝D _m×sin(θ)；(14)

Above-mentioned formula (1) is to formula (14), and α is the angle of dull and stereotyped ultra material 30 and horizontal plane, For virtual horn antenna 10 ' with the angle of horizontal plane, D _mFor virtual horn antenna 10 ' with the vertical range of dull and stereotyped ultra material 30, L is the length of the ultra material 30 of flat board, n _MaxBe the largest refractive index value of the ultra material of flat board, λ is the electromagnetic wavelength of horn antenna radiation.

After the refraction index profile that obtains ultra material each point, need the artificial micro-structural of arranging of cycle on the base material to make the refraction index profile accord with expectation of ultra material monolithic with the refractive index value that changes every of ultra material.The size of artificial metal's micro-structural and topological pattern all can have influence on the refractive index value of ultra material elementary cell.Choosing of artificial metal's micro-structural topology pattern and size can be through the Computer Simulation realization, also can be through in artificial metal's micro-structural database of foundation, choosing.Each ultra sheet of material can require to select needed artificial metal's micro-structural topology pattern and size according to the refraction index profile of self.Discuss several kinds of topological patterns that can change artificial metal's micro-structural of ultra material elementary cell refractive index below.

As shown in Figure 4, Fig. 4 is for producing the geometry topological pattern of response with artificial metal's micro-structural of first preferred embodiments that changes ultra material elementary cell refractive index to electromagnetic wave.

Shown in Figure 4 is the sketch map of the alabastrine metal micro structure in plane; Described alabastrine metal micro structure has the first metal wire J1 and the second metal wire J2 that vertically divides equally each other; The said first metal wire J1 is identical with the length of the second metal wire J2; The said first metal wire J1 two ends are connected with two first F1 of metal branch of equal length; The said first metal wire J1 two ends are connected on the mid point of two first F1 of metal branch; The said second metal wire J2 two ends are connected with two second F2 of metal branch of equal length, and the said second metal wire J2 two ends are connected on the mid point of two second F2 of metal branch, the equal in length of said first F1 of metal branch and second F2 of metal branch.

Fig. 5 is a kind of derived structure of the alabastrine metal micro structure in plane shown in Figure 4.Its two ends at each first F1 of metal branch and each second F2 of metal branch all are connected with identical the 3rd F3 of metal branch, and the mid point of corresponding the 3rd F3 of metal branch links to each other with the end points of first F1 of metal branch and second F2 of metal branch respectively.The rest may be inferred, and the present invention can also derive the metal micro structure of other form.

Fig. 6 is a kind of distressed structure of the alabastrine metal micro structure in plane shown in Figure 4; The metal micro structure of this kind structure; The first metal wire J1 and the second metal wire J2 are not straight lines; But folding line, the first metal wire J1 and the second metal wire J2 are provided with two kink WZ, divide equally but the first metal wire J1 remains vertical with the second metal wire J2; Through be provided with kink towards with the relative position of kink on first metal wire and second metal wire, make metal micro structure shown in Figure 6 wind to revolve the figure that turn 90 degrees with the axis of the second metal wire intersection point to any direction all to overlap with former figure perpendicular to first metal wire.In addition, other distortion can also be arranged, for example, the first metal wire J1 and the second metal wire J2 all are provided with a plurality of kink WZ.

After confirming metal micro structure shape and refraction index profile; Describe the process that obtains whole ultra material refraction index profile through the differentiation of the artificial metal's micro-structural shape and size on each ultra material cell below in detail; This process can obtain through Computer Simulation, and concrete steps are following:

(1) confirms the base material that adheres to of metal micro structure.In the present embodiment, base material adopts the FR-4 composite material to process, and described FR-4 composite material is processed has a predetermined dielectric constant, and for example dielectric constant is 3.3 FR-4 composite material.Base material also can adopt for example ceramic material, ferroelectric material, ferrite material, PS material etc.

(2) size of definite ultra material cell.The size of the size of ultra material cell is obtained by the centre frequency of horn antenna, utilizes frequency to obtain its wavelength, gets less than numerical value of 1/5th of wavelength length C D and width KD as ultra material cell D again.In the present embodiment, said ultra material cell D is that long CD and wide KD as shown in Figure 1 is 2.5mm, thickness HD is the square platelet of 0.818mm.

(3) confirm the material and the topological structure of metal micro structure.Among the present invention, the material of metal micro structure is a copper, and the topological structure of metal micro structure is the alabastrine metal micro structure in plane shown in Figure 4, and its live width W is consistent everywhere; The topological structure here is meant the basic configuration that topology develops.

(4) confirm the topology parameter of metal micro structure.As shown in Figure 4, among the present invention, the topology parameter of the alabastrine metal micro structure in plane comprises the live width W of metal micro structure, the length a of the first metal wire J1, the length b of first F1 of metal branch.

(5) confirm the differentiation restrictive condition of the topology of metal micro structure.In the present embodiment; The differentiation restrictive condition of the topology of metal micro structure has, the minimum spacing WL between the metal micro structure (promptly as shown in Figure 4, the long limit of metal micro structure and ultra material cell or the distance of broadside are WL/2); The live width W of metal micro structure, the size of ultra material cell; Because the processing technology restriction, WL is more than or equal to 0.1mm, and same, live width W is greater than to equal 0.1mm.Among the present invention, WL gets 0.1mm, and W gets 0.3mm, and ultra material cell is of a size of the long and wide 2.5mm that is, thickness is 0.818mm, and this moment, the topology parameter of metal micro structure had only a and two variablees of b.The passing through like Fig. 7 of the topology of metal micro structure corresponding to a certain CF (for example 12.225GHZ), can obtain a continuous variations in refractive index scope to differentiation mode shown in Figure 8.

Particularly, the differentiation of the topology of said metal micro structure comprises two stages (basic configuration that topology develops is a metal micro structure shown in Figure 4):

Phase I: according to developing restrictive condition, under the situation that the b value remains unchanged, a value is changed to maximum from minimum value, the metal micro structure in this evolution process is " ten " font (except when a gets minimum value).In the present embodiment, the minimum value of a is 0.3mm (live width W), and the maximum of a is (CD-WL), i.e. 2.5-0.1mm, and then the maximum of a is 2.4mm.Therefore; In the phase I, the differentiation of the topology of metal micro structure is as shown in Figure 7, promptly is the square JX1 of W from the length of side; Develop into maximum " ten " font topology JD1 gradually; In " ten " font topology JD1 of maximum, the first metal wire J1 and the second metal wire J2 length are 2.4mm, and width W is 0.3mm.In the phase I, along with the differentiation of the topology of metal micro structure, the refractive index of the ultra material cell corresponding with it increases ((respective antenna one CF) continuously.

Second stage: according to developing restrictive condition, when a was increased to maximum, a remained unchanged; At this moment, b is increased continuously maximum from minimum value, the metal micro structure in this evolution process is the plane flakes.In the present embodiment, the minimum value of b is 0.3mm (live width W), and the maximum of b is (CD-WL-2W), i.e. 2.5-0.1-2*0.3mm, and then the maximum of b is 1.8mm.Therefore, in second stage, the differentiation of the topology of metal micro structure is as shown in Figure 8; Promptly from " ten " font topology JD1 of maximum; Develop into the maximum alabastrine topology JD2 in plane gradually, the alabastrine topology JD2 in the plane of the maximum here is meant that the length b of first J1 of metal branch and second J2 of metal branch can not extend again; Otherwise the first metal branch and the second metal branch will take place to intersect, and the maximum of b is 1.8mm.At this moment, first metal wire and the second metal wire length are 2.4mm, and width is 0.3mm, and the length of the first metal branch and the second metal branch is 1.8mm, and width is 0.3mm.In second stage, along with the differentiation of the topology of metal micro structure, the refractive index of the ultra material cell corresponding with it increases (respective antenna one CF) continuously.

The variations in refractive index scope of the ultra material cell that obtains through above-mentioned differentiation satisfies design demand.Do not satisfy design demand if above-mentioned differentiation obtains the variations in refractive index scope of ultra material cell, for example maximum is too little, then changes WL and W, and emulation again is up to obtaining the variations in refractive index scope that we need.

Each metal micro structure through etching, bore mode such as quarter, electrograving, ion quarter and be arranged in substrate surface.

Through adjust virtual horn antenna 10 ' with the vertical range D of dull and stereotyped ultra material 30 _m, virtual horn antenna 10 ' with the angle of horizontal plane

On horn antenna 10 and the dull and stereotyped ultra material 30 near the vertical range Y at an end edge of horn antenna 10 _LIn the hope of obtaining preferable electric property.D _m, Y _LWhen getting different value, value such as the following table of far field maximum FFmax, half-power point beamwidth HPBW and the maximum sidelobe levels FFmax-S of offset-fed horn antenna of the present invention system:

D m	Θ	Y L	FFmax	HPBW	FFmax-s
						0.45m	88°	0.112m	36.5551dB	3.1936°	12.3972dB
0.45m	90°	0.112m	36.6177dB	3.1393°	11.1926dB
						0.45m	92°	0.13m	36.8194dB	2.9742°	11.4195dB
0.45m	93°	0.15m	36.3080dB	3.2745°	10.9232dB
						0.45m	94°	0.15m	36.4651dB	3.1357°	11.9707dB
0.45m	95°	0.15m	36.5928dB	3.0558°	12.5304dB
						0.45m	96°	0.15m	36.7044dB	2.8863°	13.6871dB
0.475m	88°	0.135m	36.6896dB	3.1456°	11.1059dB
						0.475m	89°	0.13m	36.4537dB	3.2080°	12.8509dB
0.475m	89°	0.14m	36.6508dB	3.0844°	13.1613dB
						0.475m	89°	0.15m	36.7565dB	3.0034°	14.0195dB
0.475m	90°	0.13m	36.5307dB	3.1006°	11.2602dB
						0.475m	90°	0.14m	36.7081dB	3.0233°	12.3199dB
0.475m	90°	0.15m	36.7256dB	2.9651°	11.7371dB
						0.475m	91°	0.15m	36.7566dB	2.7867°	12.2849dB
0.475m	92°	0.15m	36.8767dB	2.7156°	13.2755dB
						0.5m	83.5°	0.125m	36.8013dB	3.1324°	13.3293dB
0.5m	83.9°	0.125m	36.9247dB	3.0397°	12.7097dB
						0.5m	84°	0.125m	36.9924dB	3.0120°	12.7673dB

0.5m	84.1°	0.125m	36.9809dB	3.0102°	12.9762dB
						0.5m	84.5°	0.125m	36.8123dB	3.1195°	12.6076dB
0.5m	84.5°	0.13m	36.8155dB	3.1128°	13.3800dB
						0.5m	85°	0.13m	36.6828dB	3.1435°	13.3913dB
0.5m	85°	0.14m	36.8216dB	3.0597°	14.1825dB
						0.5m	86°	0.14m	36.9390dB	2.9480°	13.7075dB
0.5m	86°	0.15m	36.9960dB	2.9352°	15.1039dB
						0.55m	74°	0.112m	36.1245dB	3.4806°	14.1073dB
0.55m	75°	0.115m	36.8799dB	3.1728°	15.2596dB
						0.55m	76°	0.112m	36.9376dB	2.9090°	16.5214dB

Can know by last table, in the present embodiment, virtual horn antenna 10 ' with the vertical range D of dull and stereotyped ultra material 30 _mBe preferably 0.5 meter, virtual horn antenna 10 ' with the angle of horizontal plane

Be preferably 86 °, on horn antenna 10 and the dull and stereotyped ultra material 30 near the vertical range Y at an end edge of horn antenna 10 _LBe preferably 0.15 meter.

Combine accompanying drawing that embodiments of the invention are described above; But the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.

Claims (10)

1. offset-fed horn antenna system; It is characterized in that: comprise horn antenna, be arranged at the reflection unit of horn antenna one side; Be arranged at the ultra material of flat board of horn antenna opposite side, be pasted with reflecting surface on the side surface away from horn antenna on the ultra material of said flat board; The ultra material of said flat board comprises base material and is arranged in a plurality of artificial micro-structural on the base material; The electromagnetic wave of said horn antenna radiation reflects through the reflection unit face that is reflected behind the dull and stereotyped ultra material of reflexing to and radiate from the ultra material of flat board with the form of plane electromagnetic wave.

2. offset-fed horn antenna as claimed in claim 1 system, it is characterized in that: with the ultra material central point of flat board is that initial point is set up the XY coordinate system, any point on the dull and stereotyped ultra material (x, refractive index n y) (x y) can obtain through following formula:

$n(x,y)=n_{\max }-\frac{\mathrm{route}-v_{\mathrm{seg}}}{d};---\left(1\right)$

route＝route ₁+route ₂；(2)

$r{\mathrm{oute}}_1=\sqrt{{\mathrm{dis}}^2+{(r-r_0)}^2};---\left(3\right)$

${\mathrm{route}}_2=(\frac{\mathrm{dia}}{2}-r)\cos \left(\mathrm{\&alpha;}\right);---\left(4\right)$

r＝x?cos(α)+y?sin(α)；(6)

r ₀＝x ₀cos(α)+y ₀sin(α)；(7)

$\mathrm{dia}=\frac{L}{\sin \left(\mathrm{\&alpha;}\right)};---\left(8\right)$

ν _seg＝ss+λ×num _seg；(9)

${\mathrm{num}}_{\mathrm{seg}}=\mathrm{floor}\left(\frac{\mathrm{route}-\mathrm{ss}}{\mathrm{\&lambda;}}\right);---\left(11\right)$

$d=\frac{\mathrm{\&lambda;}}{n_{\max }-n_{\min }};---\left(12\right)$

x ₀＝D _m×cos(θ)；(13)

y ₀＝D _m×sin(θ)；(14)

Above-mentioned formula (1) is to formula (14), and α is the angle of dull and stereotyped ultra material and horizontal plane, Be the angle of virtual horn antenna and horizontal plane, D _mBe the vertical range of virtual horn antenna with dull and stereotyped ultra material, L is the length of dull and stereotyped ultra material, n _MaxBe the largest refractive index value of the ultra material of flat board, λ is the electromagnetic wavelength of horn antenna radiation; Said virtual horn antenna and said horn antenna are that symmetry axis is symmetrically distributed with said reflection unit.

3. offset-fed horn antenna as claimed in claim 2 system; It is characterized in that: said artificial metal's micro-structural is the plane flakes; Said artificial metal's micro-structural has first metal wire and second metal wire of vertically dividing equally each other; Said first metal wire is identical with the length of second metal wire; The said first metal wire two ends are connected with two first metal branches of equal length, and the said first metal wire two ends are connected on the mid point of two first metal branches, and the said second metal wire two ends are connected with two second metal branches of equal length; The said second metal wire two ends are connected on the mid point of two second metal branches, the equal in length of the said first metal branch and the second metal branch.

4. offset-fed horn antenna as claimed in claim 2 system; It is characterized in that: first metal wire of the alabastrine metal micro structure in said plane and second metal wire are provided with two kinks, and the alabastrine metal micro structure in said plane winds and revolves the figure that turn 90 degrees with the axis of the second metal wire intersection point to any direction perpendicular to first metal wire and all overlap with former figure.

5. offset-fed horn antenna as claimed in claim 3 system; It is characterized in that: each the first metal branch of the alabastrine artificial metal's micro-structural in said plane and the two ends of each second metal branch also are connected with identical the 3rd metal branch, and the mid point of corresponding the 3rd metal branch links to each other with the end points of the first metal branch and the second metal branch respectively.

6. offset-fed horn antenna as claimed in claim 2 system; It is characterized in that: the vertical range of virtual horn antenna and dull and stereotyped ultra material is that 0.45 to 0.55 meter, virtual horn antenna are 74 ° to 92 ° with the angle of horizontal plane, is 0.112 to 0.15 meter near the vertical range at an end edge of horn antenna on horn antenna and the ultra material of flat board.

7. offset-fed horn antenna as claimed in claim 6 system; It is characterized in that: the vertical range of virtual horn antenna and dull and stereotyped ultra material is that 0.5 meter, virtual horn antenna are 86 ° with the angle of horizontal plane, is 0.15 meter near the vertical range at an end edge of horn antenna on horn antenna and the ultra material of flat board.

8. offset-fed horn antenna as claimed in claim 3 system; It is characterized in that: said a plurality of artificial metal's micro-structurals are that the basic configuration differentiation obtains with plane flakes metal micro structure; Plane flakes metal micro structure comprises first metal wire and second metal wire of vertically dividing equally each other; Said first metal wire is identical with the length of second metal wire; The said first metal wire two ends are connected with two first metal branches of equal length, and the said first metal wire two ends are connected on the mid point of two first metal branches, and the said second metal wire two ends are connected with two second metal branches of equal length; The said second metal wire two ends are connected on the mid point of two second metal branches, the equal in length of the said first metal branch and the second metal branch; The differentiation mode is: (1) forms first metal wire and second metal wire from the square-shaped metal piece to its four limits growing metal, and first metal wire and second metal wire grow into maximum gradually; (2) first metal wires and second metal wire grow into after the maximum from the first metal wire two ends and grow respectively in the second metal wire two ends first metal branch and the second metal branch, the first metal branch and the second metal branch grow into maximum gradually.

9. offset-fed horn antenna as claimed in claim 1 system is characterized in that: said base material adopts FR-4 material, ceramic material, ferroelectric material, ferrite material or PS material to process.

10. offset-fed horn antenna as claimed in claim 1 system is characterized in that: said metal micro structure through etching, bore quarter, electrograving or ion mode at quarter and be arranged in substrate surface.

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