CN102683875B - Offset-fed satellite television antenna and satellite television receiving system thereof - Google Patents

Abstract

The invention discloses an offset-fed satellite television antenna which comprises a metamaterial panel fixedly attached to a vertical wall. The lower edge of the metamaterial panel and the upper end of a feed source are positioned on the same level. The metamaterial panel comprises a reflecting layer and a core layer, wherein one lateral surface of the reflecting layer is close to the wall, the core layer is arranged on the other lateral surface of the reflecting layer and comprises a plurality of slice layers, each slice layer of the core layer comprises a first sheet base material and a plurality of first artificial microstructures arranged on the first base material, and the antenna can receive a television signal of a specific satellite through the special design of refractive index distribution of the slice layers of the core layer. According to the offset-fed satellite television antenna, a traditional parabolic antenna is replaced by the sheet metamaterial panel, so that manufacturing and processing are easier, cost is lower, and consistency of products is high.

Description

A kind of offset-feed type satellite tv antenna and satellite television receiving system thereof

Technical field

The present invention relates to the communications field, more particularly, relate to a kind of offset-feed type satellite tv antenna and satellite television receiving system thereof.

Background technology

The satellite earth receiving station that traditional satellite television receiving system is made up of parabolic antenna, feed, tuner, satellite receiver.Parabolic antenna is responsible for satellite-signal to reflex to the feed and tuner that are positioned at focus place.Feed be arrange at the focus place of parabolic antenna one for collecting the loudspeaker of satellite-signal, also known as corrugated horn.Its major function has two: one to be collected by the electromagnetic wave signal that antenna receives, and is transformed into signal voltage, supply high frequency head.Two is carry out polarization conversion to the electromagnetic wave received.Tuner LNB (also known as frequency demultiplier) is that the satellite-signal sent here by feed carries out frequency reducing and then signal amplification is sent to satellite receiver.Generally can be divided into C-band frequency LNB (3.7GHz-4.2GHz, 18-21V) and Ku audio range frequency LNB (10.7GHz-12.75GHz, 12-14V).The workflow of LNB be exactly first satellite high-frequency signals is amplified to hundreds thousand of times afterwards recycle local oscillation circuit high-frequency signals is converted to intermediate frequency 950MHz-2050MHz, be beneficial to the transmission of coaxial cable and the solution mediation work of satellite receiver.Satellite receiver is that the satellite-signal transported by tuner carries out demodulation, demodulates satellite television image or digital signal and audio signal.

During receiving satellite signal, after parallel electromagnetic wave (plane wave) is reflected by parabolic antenna, converge on feed.Usually, the feed that parabolic antenna is corresponding is a horn antenna.

But because the Machining of Curved Surface difficulty of the reflecting surface of parabolic antenna is large, required precision is also high, therefore, makes trouble, cost is higher, and the consistency of product is poor.

Summary of the invention

Technical problem to be solved by this invention is, for the processing of existing satellite tv antenna not easily, the high and defect that homogeneity of product is poor of cost, provide a kind of and process simple, low cost of manufacture and the high offset-feed type satellite tv antenna of homogeneity of product.

The technical solution adopted for the present invention to solve the technical problems is: a kind of offset-feed type satellite tv antenna, described offset-feed type satellite tv antenna comprises the metamaterial panel be fixedly attached on vertical wall, described metamaterial panel comprises a side surface by the reflector of wall setting and the core layer being arranged on opposite side surface, reflector, described core layer comprises multiple core layer, the first base material that described core layer comprises sheet and multiple first man-made microstructure be arranged on the first base material, the refraction index profile of described core layer meets following formula:

$n(x,y,0)=n_{\max }-\frac{\mathrm{dis}-v_{\mathrm{segment}}}{\stackrel{\‾}{D}},$

V _segment＝ss+λ*num _segment，

${\mathrm{num}}_{\mathrm{segment}}=\mathrm{floor}\left(\frac{\mathrm{dis}-\mathrm{ss}}{\mathrm{\λ}}\right),$

$\stackrel{\‾}{D}=\frac{\mathrm{\λ}}{n_{\max }-n_{\min }},$

dis＝d ₁+d ₂，

$d_1=\sqrt{x^2+{(y-y_{\mathrm{source}})}^2+z_{\mathrm{source}}^2},$

d ₂＝sinγ*(L/2-y)，

ss＝sinγ*(L/2-y _virtual)-cosγ*z _virtual，

Above formula sets up coordinate system in metamaterial panel, wherein metamaterial panel central point is the origin of coordinates (0,0,0), satellite is at the subpoint of described wall, the central point of metamaterial panel and the feed subpoint three point on a straight line at described wall, and the conllinear of described 3 is y-axis, and is just towards satellite in the subpoint direction of described wall, vertical described metamaterial panel is z-axis, and is just outward towards wall;

Wherein, n (x, y, 0) represents the refractive index value of any point in core layer;

L represent core layer by coordinate surface yoz the effective length of cutting;

N _maxrepresent the maximum of the refractive index of core layer;

N _minrepresent the minimum value of the refractive index of core layer;

λ represents the electromagnetic wavelength that satellite tv antenna receives;

γ represents that the electromagnetic wave that sends from particular satellite is when metamaterial panel surface is incident and angle formed by metamaterial panel normal;

Floor represents and rounds downwards;

(x _source, y _source, z _source) represent the coordinate of feed equivalent point;

(x _virtual, y _virtual, z _virtual) represent the coordinate of feed equivalent point relative to the symmetric points of coordinate surface xoy.

Further, described first base material comprises the first prebasal plate and first metacoxal plate of sheet, and described multiple first man-made microstructure is folded between the first prebasal plate and the first metacoxal plate.

Further, the thickness of described core layer is 0.546mm, and wherein, the thickness of the first prebasal plate and the first metacoxal plate is 0.254mm, and the thickness of multiple first man-made microstructure is 0.038mm.

Further, described metamaterial panel also comprises the impedance matching layer being arranged on core layer opposite side surface, described impedance matching layer comprises multiple impedance matching layer lamella, the second base material that described impedance matching layer lamella comprises sheet and multiple second man-made microstructure be arranged on the second base material, the refraction index profile of described impedance matching layer lamella meets following formula:

$n_i={\left(\frac{n_{\min }+n_{\max }}{2}\right)}^{\frac{m-i}{m}};$

Wherein, i represents the numbering of impedance matching layer lamella, near described core layer impedance matching layer lamella be numbered m, by core layer to z-axis direction, numbering reduce successively, outermost impedance matching layer lamella be numbered 1;

Above-mentioned n _max, n _minbe the maximum of the refractive index of core layer, minimum value.

Further, described second base material comprises the second prebasal plate and second metacoxal plate of sheet, and described multiple second man-made microstructure is folded between the second prebasal plate and the second metacoxal plate.

Further, the thickness of described impedance matching layer lamella is 0.546mm, and wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.254mm, and the thickness of multiple second man-made microstructure is 0.038mm.

Further, the arbitrary longitudinal section of described metamaterial panel is of similar shape and area.

Further, the longitudinal section of described metamaterial panel is square, circular or oval.

Further, described first man-made microstructure and the second man-made microstructure metal micro structure all for being made up of copper cash or silver-colored line, described metal micro structure by etching, plating, bore quarters, photoetching, electronics carve or ion quarter method be attached to respectively on the first base material and the second base material.

Further, described metal micro structure is plane flakes, described metal micro structure has the first metal wire and the second metal wire mutually vertically divided equally, described first metal wire is identical with the length of the second metal wire, described first metal wire two ends are connected with two the first metal branch of equal length, described first metal wire two ends are connected on the mid point of two the first metal branch, described second metal wire two ends are connected with two the second metal branch of equal length, described second metal wire two ends are connected on the mid point of two the second metal branch, described first metal branch is equal with the length of the second metal branch.

Further, each first metal branch of the alabastrine metal micro structure of described plane and the two ends of each second metal branch are also connected with identical 3rd metal branch, and the mid point of corresponding 3rd metal branch is connected with the end points of the first metal branch and the second metal branch respectively.

Further, first metal wire of the alabastrine metal micro structure of described plane and the second metal wire are provided with two kinks, and the alabastrine metal micro structure of described plane all overlaps with former figure to the figure of any direction 90-degree rotation around the axis perpendicular to the first metal wire and the second metal wire intersection point.

According to offset-feed type satellite tv antenna of the present invention, instead of traditional parabolic antenna by the metamaterial panel of sheet, manufacture processing and be more prone to, cost is cheaper, and the consistency of product is high, simultaneously, offset-feed type satellite tv antenna of the present invention is directly attached on the vertical wall in house, do not take up room, also do not need complicated support, save cost further, and install simple, such as, directly can follow closely on wall with nail, or fasten with glue on wall.Further, design antenna being attached at wall efficiently solves the windage problem of traditional parabolic antenna.

In addition, present invention also offers a kind of satellite television receiving system.

A kind of satellite television receiving system, comprise feed, the tuner connecting feed and the satellite receiver be connected with tuner, described satellite television receiving system also comprises above-mentioned offset-feed type satellite tv antenna, described offset-feed type satellite tv antenna is fixedly attached on vertical wall, and described feed is fixed on the vertical wall in house by pole.

Further, described feed is double-circle polarization corrugated horn, left-hand circular polarization corrugated horn or right-handed circular polarization corrugated horn.

Further, the incoming frequency of tuner used is 11.7 ~ 12.2GHz, and output frequency is 950 ~ 1450MHz.

Further, feed three-dimensional used is adjustable.

Accompanying drawing explanation

Fig. 1 is the structural representation of offset-feed type satellite tv antenna in the first embodiment of the present invention;

Fig. 2 is the structural representation of the satellite television receiving system of an embodiment of the present invention;

Fig. 3 is the perspective diagram of one of them metamaterial unit of core layer of the present invention;

Fig. 4 is the structural representation of core layer of the present invention;

Fig. 5 is the structural representation of impedance matching layer lamella of the present invention;

Fig. 6 is the schematic diagram of the alabastrine metal micro structure of plane of the present invention;

Fig. 7 is a kind of derived structure of the alabastrine metal micro structure of plane shown in Fig. 6;

Fig. 8 is a kind of distressed structure of the alabastrine metal micro structure of plane shown in Fig. 6.

Fig. 9 is the first stage of the differentiation of the topology of the alabastrine metal micro structure of plane;

Figure 10 is the second stage of the differentiation of the topology of the alabastrine metal micro structure of plane;

Figure 11 is the structural representation of the offset-feed type satellite tv antenna of the another kind of embodiment of the present invention;

Embodiment

As shown in Figures 1 to 5, for the structural representation of the offset-feed type satellite tv antenna of first embodiment of the invention, described offset-feed type satellite tv antenna comprises the metamaterial panel 100 be fixedly attached on vertical wall NQ, the lower edge of described metamaterial panel 100 and the upper end of feed 1 are in same level, and described metamaterial panel 100 comprises a side surface and leans on the reflector 200 of wall setting, be arranged on the core layer 10 on opposite side surface, reflector 200 and arrange the impedance matching layer 20 on core layer opposite side surface.Feed 1 is traditional corrugated horn, and this difference of polarization mode according to the TV signal of satellite has different selections, and such as No. 9, culminant star, the existing left-hand circular polarization of its TV signal has right-handed circular polarization again, and therefore feed should adopt the corrugated horn of double-circle polarization.In addition, in the present invention, reflector is the metallic reflection plate with smooth surface, and can be such as the copper coin of polishing, aluminium sheet or iron plate etc., may also be PEC (perfect electric conductor) reflecting surface, can certainly be metal coating.In the present embodiment, the described arbitrary longitudinal section of metamaterial panel 100 is of similar shape and area, namely core layer and matching layer are of similar shape the longitudinal section with area, and longitudinal section herein refers to section vertical with the axis of metamaterial panel in metamaterial panel.The longitudinal section of described metamaterial panel is square, circular or oval, and preferably, the longitudinal section of described metamaterial panel is square, and the metamaterial panel obtained so is easily processed, the square of such as 450X450mm.The circle of circle can be diameter be 450mm.

In the present embodiment, described core layer 10 comprises multiple core layer 11, the first base material 13 that described core layer 11 comprises sheet and multiple first man-made microstructure 12 be arranged on the first base material 13.In the present embodiment, preferably, as shown in Figure 4, described first base material 13 comprises the first prebasal plate 131 and the first metacoxal plate 132 of sheet, and described multiple first man-made microstructure 12 is folded between the first prebasal plate 131 and the first metacoxal plate 132.Preferably, the thickness of described core layer 11 is 0.546mm, and wherein, the thickness of the first prebasal plate 131 and the first metacoxal plate 132 is 0.254mm, and the thickness of multiple first man-made microstructure 12 is 0.038mm.

In the present embodiment, described impedance matching layer 20 comprises multiple impedance matching layer lamella 21, the second base material 23 that described impedance matching layer lamella 21 comprises sheet and multiple second man-made microstructure (not indicating in figure) be arranged on the second base material 23, preferably, in the present embodiment, as shown in Figure 5, described second base material 23 comprises the second prebasal plate 231 and the second metacoxal plate 232 of sheet, and described multiple second man-made microstructure is folded between the second prebasal plate 231 and the second metacoxal plate 232.Preferably, the thickness of described impedance matching layer lamella is 0.546mm, and wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.254mm, and the thickness of multiple second man-made microstructure is 0.038mm.

In the present embodiment, the refraction index profile of described core layer meets following formula:

$n(x,y,0)=n_{\max }-\frac{\mathrm{dis}-v_{\mathrm{segment}}}{\stackrel{\‾}{D}}---\left(1\right),$

v _segment＝ss+λ*num _segment(2)，

${\mathrm{num}}_{\mathrm{segment}}=\mathrm{floor}\left(\frac{\mathrm{dis}-\mathrm{ss}}{\mathrm{\λ}}\right)---\left(3\right),$

$\stackrel{\‾}{D}=\frac{\mathrm{\λ}}{n_{\max }-n_{\min }}---\left(4\right),$

dis＝d ₁+d ₂(5)，

$d_1=\sqrt{x^2+{(y-y_{\mathrm{source}})}^2+z_{\mathrm{source}}^2}---\left(6\right),$

d ₂=sinγ*(L/2-y) (7)，

ss＝sinγ*(L/2-y _virtual)-cosγ*z _virtual(8)，

Above formula sets up coordinate system in metamaterial panel, wherein metamaterial panel central point is origin of coordinates O (0,0,0), satellite is at the subpoint of described wall, the central point of metamaterial panel and the feed subpoint three point on a straight line at described wall, and the conllinear of described 3 is y-axis, and is just towards satellite in the subpoint direction of described wall, vertical described metamaterial panel is z-axis, and is just outward towards wall;

Wherein, n (x, y, 0) represents the refractive index value of any point in core layer;

L represent core layer by coordinate surface yoz the effective length of cutting;

N _maxrepresent the maximum of the refractive index of core lamella;

N _minrepresent the minimum value of the refractive index of core lamella;

λ represents the electromagnetic wavelength that satellite tv antenna receives;

γ represents that the electromagnetic wave that sends from particular satellite is when metamaterial panel surface is incident and angle formed by metamaterial panel normal;

Floor represents and rounds downwards;

P ₁(x _source, y _source, z _source) represent the coordinate of feed equivalent point;

P ₁' (x _virtual, y _virtual, z _virtual) represent the coordinate of feed equivalent point relative to the symmetric points of coordinate surface xoy.

In the present embodiment, the refraction index profile of described impedance matching layer lamella meets following formula:

$n_i={\left(\frac{n_{\min }+n_{\max }}{2}\right)}^{\frac{m-i}{m}}---\left(9\right);$

Wherein, i represents the numbering of impedance matching layer lamella, near described core layer impedance matching layer lamella be numbered m, by core layer to z-axis direction, numbering reduce successively, outermost impedance matching layer lamella be numbered 1;

Above-mentioned n _max, n _minbe the maximum of the refractive index of core layer, minimum value.

In the present embodiment, described first man-made microstructure, the second man-made microstructure metal micro structure all for being made up of copper cash or silver-colored line, described metal micro structure by etching, plating, bore quarters, photoetching, electronics carve or ion quarter method be attached to the first base material, the second base material respectively.Preferably, described first man-made microstructure, the second man-made microstructure are the alabastrine metal micro structure of plane shown in Fig. 6 develops the multiple different topology obtained metal micro structure by topology.

In the present embodiment, core layer can obtain by the following method, namely on the surface of any one of the first prebasal plate and the first metacoxal plate, copper is covered, multiple first metal micro structure (shape of multiple first metal micro structure is obtained by Computer Simulation in advance with arrangement) is obtained again by etching method, finally the first prebasal plate and the first metacoxal plate are pressed together respectively, namely core layer of the present invention is obtained, the method of pressing can be direct hot pressing, also can be utilize PUR to connect, certainly may also be other mechanical connection, such as bolt connects.

In like manner, impedance matching layer lamella also can utilize identical method to obtain.Then respectively by multiple core layer pressing one, core layer of the present invention is namely defined; Equally, by multiple impedance matching layer lamella pressing one, impedance matching layer of the present invention is namely defined; Namely core layer, impedance matching layer pressing one are obtained metamaterial panel of the present invention.

In the present embodiment, described first base material, the second base material are obtained by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material etc.Macromolecular material is available F4B composite material, FR-4 composite material, PS (polystyrene) etc.Preferably, in the present invention, the first prebasal plate of described first base material adopts identical PS with the first metacoxal plate; Equally, in the present invention, the second prebasal plate of described second base material also adopts identical PS with the second metacoxal plate.

Figure 6 shows that the schematic diagram of the alabastrine metal micro structure of plane, described alabastrine metal micro structure has the first metal wire J1 and the second metal wire J2 that mutually vertically divide equally, described first metal wire J1 is identical with the length of the second metal wire J2, described first metal wire J1 two ends are connected with two the first metal branch F1 of equal length, described first metal wire J1 two ends are connected on the mid point of two the first metal branch F1, described second metal wire J2 two ends are connected with two the second metal branch F2 of equal length, described second metal wire J2 two ends are connected on the mid point of two the second metal branch F2, described first metal branch F1 is equal with the length of the second metal branch F2.

Fig. 7 is a kind of derived structure of the alabastrine metal micro structure of plane shown in Fig. 6.It is all connected with identical 3rd metal branch F3 at the two ends of each first metal branch F1 and each second metal branch F2, and the mid point of corresponding 3rd metal branch F3 is connected with the end points of the first metal branch F1 and the second metal branch F2 respectively.The rest may be inferred, and the present invention can also derive the metal micro structure of other form.

Fig. 8 is a kind of distressed structure of the alabastrine metal micro structure of plane shown in Fig. 6, the metal micro structure of this kind of structure, first metal wire J1 and the second metal wire J2 is not straight line, but folding line, first metal wire J1 and the second metal wire J2 is provided with two kink WZ, but the first metal wire J1 remains vertical with the second metal wire J2 to be divided equally, by arrange kink towards with the relative position of kink on the first metal wire and the second metal wire, metal micro structure shown in Fig. 8 is all overlapped with former figure to the figure of any direction 90-degree rotation around the axis perpendicular to the first metal wire and the second metal wire intersection point.In addition, other can also be had to be out of shape, such as, the first metal wire J1 and the second metal wire J2 all arranges multiple kink WZ.

In the present embodiment, described core layer 11 can be divided into multiple metamaterial unit D as shown in Figure 3 of array arrangement, each metamaterial unit D comprises prebasal plate unit U, metacoxal plate unit V and is arranged on the first man-made microstructure 12 between base board unit U, metacoxal plate unit V, the length, width and height of usual metamaterial unit D are all not more than 1/5th wavelength, be preferably 1/10th wavelength, therefore, the size of metamaterial unit D can be determined according to the operating frequency of antenna.Fig. 3 is the technique of painting of perspective, and to represent the position in the metamaterial unit D of the first man-made microstructure, as shown in Figure 3, described first man-made microstructure is sandwiched between base board unit U, metacoxal plate unit V, and its surface, place represents with SR.

Known refractive index wherein μ is relative permeability, and ε is relative dielectric constant, and μ and ε is collectively referred to as electromagnetic parameter.Experiment proves, when electromagnetic wave is by refractive index dielectric material heterogeneous, and can to the large direction deviation of refractive index.When relative permeability is certain (usually close to 1), refractive index is only relevant with dielectric constant, when the first base material is selected, utilize the arbitrary value (within the specific limits) that only can realize metamaterial unit refractive index to the first man-made microstructure of electric field response, under this center of antenna frequency (12.5GHZ), utilize simulation software, as CST, MATLAB, COMSOL etc., the situation that the dielectric constant being obtained the man-made microstructure (the alabastrine metal micro structure of plane as shown in Figure 6) of a certain given shape by emulation is changed along with the refractive index variable of topology, data one to one can be listed, the core layer 11 of the specific refractive index distribution that we need can be designed, in like manner can obtain the refraction index profile of impedance matching layer lamella, thus obtain the refraction index profile of whole metamaterial panel 100.

In the present embodiment, the structural design of core layer obtains by Computer Simulation (CST emulation), specific as follows:

(1) the attachment base material (the first base material) of the first metal micro structure is determined.In the present invention, the first prebasal plate and first metacoxal plate of described first base material adopt identical PS plate, and described PS plate has a predetermined dielectric constant, and such as dielectric constant is the PS plate of 2.7.

(2) size of metamaterial unit is determined.The size of the size of metamaterial unit is obtained by the centre frequency of antenna, utilizes frequency to obtain its wavelength, then get be less than wavelength 1/5th a numerical value as the length CD of metamaterial unit D and width KD.In the present invention, described metamaterial unit D is long CD as shown in Figure 3 and wide KD is 2.8mm, thickness HD is 0.546mm square platelet.

(3) material and the topological structure of metal micro structure is determined.In the present invention, the material of metal micro structure is copper, and the topological structure of metal micro structure is the alabastrine metal micro structure of the plane shown in Fig. 6, and its live width W is consistent everywhere; Topological structure herein, refers to the basic configuration that topology develops.

(4) the topology parameter of metal micro structure is determined.As shown in Figure 6, in the present invention, the topology parameter of the alabastrine metal micro structure of plane comprises the live width W of metal micro structure, the length a of the first metal wire J1, the length b of the first metal branch F1.

(5) the differentiation restrictive condition of the topology of metal micro structure is determined.In the present invention, the differentiation restrictive condition of the topology of metal micro structure has, the minimum spacing WL (namely as shown in Figure 9, the long limit of metal micro structure and metamaterial unit or the distance of broadside are WL/2) between metal micro structure, the live width W of metal micro structure, the size of metamaterial unit; Due to processing technology restriction, WL is more than or equal to 0.1mm, and equally, live width W is greater than to equal 0.1mm.First time, when emulating, WL can get 0.1mm, and W can get 0.3mm, and it is 2.8mm that metamaterial unit is of a size of long and wide, and thickness is 0.546mm, and now the topology parameter of metal micro structure only has a and b Two Variables.The topology of metal micro structure, by the differentiation mode as shown in Fig. 9 to Figure 10, corresponding to a certain characteristic frequency (such as 11.95GHZ), can obtain a continuous print variations in refractive index scope.

Particularly, the differentiation of the topology of described metal micro structure comprises two stages (basic configuration that topology develops is the metal micro structure shown in Fig. 6):

First stage: according to differentiation restrictive condition, when b value remains unchanged, a value is changed to maximum from minimum value, the metal micro structure in this evolution process is " ten " font when minimum value (a get except).In the present embodiment, the minimum value of a is 0.3mm (live width W), and the maximum of a is (CD-WL).Therefore, in the first phase, the differentiation of the topology of metal micro structure as shown in Figure 9, is namely the square JX1 of W from the length of side, develops into maximum " ten " font topology JD1 gradually.In the first phase, along with the differentiation of the topology of metal micro structure, the refractive index of the metamaterial unit corresponding with it increases (respective antenna one characteristic frequency) continuously.

Second stage: according to differentiation restrictive condition, when a is increased to maximum, a remains unchanged; Now, b is increased continuously maximum from minimum value, the metal micro structure in this evolution process is 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).Therefore, in second stage, the differentiation of the topology of metal micro structure as shown in Figure 10, namely from maximum " ten " font topology JD1, develop into the alabastrine topology JD2 of maximum plane gradually, the alabastrine topology JD2 of maximum plane herein refers to, the length b of the first metal branch J1 and the second metal branch J2 can not extend again, otherwise the first metal branch is crossing by generation with the second metal branch.In second stage, along with the differentiation of the topology of metal micro structure, the refractive index of the metamaterial unit corresponding with it increases (respective antenna one characteristic frequency) continuously.

If by above-mentioned differentiation obtain metamaterial unit variations in refractive index scope meet design needs (namely this excursion contains n _min-n _maxscope).If the variations in refractive index scope that above-mentioned differentiation obtains metamaterial unit does not meet design needs, such as maximum is too little, then change WL and W, again emulate, until obtain the variations in refractive index scope of our needs.

According to formula (1) to (9), a series of metamaterial unit emulation obtained, according to after the refractive index arrangement of its correspondence (being in fact exactly the arrangement of multiple first man-made microstructure on the first base material of different topology shape), can obtain the core layer of the present embodiment.

In like manner, the impedance matching layer lamella of the present embodiment can be obtained.

In addition, the present invention also has the second embodiment, and the place different from the first embodiment is, metamaterial panel only includes core layer and reflector, does not have impedance matching layer.Other the first embodiment is identical, repeats no more.

According to offset-feed type satellite tv antenna of the present invention, instead of traditional parabolic antenna by the metamaterial panel of sheet, manufacture processing and be more prone to, cost is cheaper, and the consistency of product is high, simultaneously, offset-feed type satellite tv antenna of the present invention is directly attached on the vertical wall in house, do not take up room, also do not need complicated support, save cost further, and install simple, such as, directly can follow closely on wall with nail, or fasten with glue on wall.Further, design antenna being attached at wall efficiently solves the windage problem of traditional parabolic antenna.

Figure 11 is the structural representation of the another kind of embodiment of the present invention.In this enforcement, be divided into four cell boards 1000 unlike metamaterial panel 100, the square of to be the length of side be in the longitudinal section of each cell board 200mm, by hinged mode between four cell boards 1000, can fold.Be conducive to processing and manufacturing and the installation and maintenance of antenna like this, the dismountable connection of multiple cell board, or multiple cell board can be folded by rotating connected mode, make satellite antenna of the present invention when carrying, only occupying very little area.The formation of cell board 1000 can have following two kinds of modes:

(1) isolate after overall processing in flakes, this mode is applicable to the metamaterial flat of less area.

(2) design the overall structure parameter of metamaterial panel, before manufacture, be namely divided into multiple cell board 1000, to the independent processing and manufacturing of these cell boards.This mode is applicable to the processing of superhuge metamaterial panel very much.

Cell board, preferably adopts same size, so conveniently stacks, and the quantity of cell board can set as required.

The dismountable connection of multiple cell boards 1000, such as, can be that bolt connects, bonding, buckle connection etc.In the present embodiment, preferably, multiple cell board 1000 can be folded by rotating connected mode.

In addition, as shown in Figure 2, the present invention also provides and present invention also offers a kind of satellite television receiving system, comprise feed 1, connect the tuner 30 of feed 1 and the satellite receiver (not indicating in figure) be connected by cable with tuner 30 and offset-feed type satellite tv antenna TX of the present invention, described offset-feed type satellite tv antenna TX is fixedly attached on vertical wall NQ, described feed 1 is fixed on the vertical wall in house by pole 40, pole 40 directly can insert wall, also can be as shown in figure 11, first on wall, fix a mount pad 50, again pole 40 is fixed on mount pad.In the present invention, described feed 1 is double-circle polarization corrugated horn, left-hand circular polarization corrugated horn or right-handed circular polarization corrugated horn, such as receive the satellite television programming of No. 9, culminant star, need the feed (because culminant star No. 9 existing left-hand circular polarizations of satellite television programming, having right-handed circular polarization again) being equipped with double-circle polarization.Satellite receiver and tuner are also existing technology, no longer describe in detail herein.

In addition, in the present invention, the incoming frequency of tuner used is 11.7 ~ 12.2GHz, and output frequency is 950 ~ 1450MHz, can watch most of Ku band satellite TV.The CL11R integral high frequency head of such as Tongzhou Electronics.

Receiver, such as, can adopt the N6188 of Tongzhou Electronics, for receiving the satellite TV signal of No. 9, culminant star.Receiver is placed on indoor usually.

In addition, feed of the present invention, preferably, can realize three-dimensional adjustable.With for different regions, finely tune.The three-dimensional of feed is adjustable, can by arranging realization free to rotate between pole 40 and mount pad 50, and the part that also can be connected with feed pole 40 arranges mechanical structure, makes the relative pole of feed can Three dimensional rotation.There is the mechanical link much realizing this function in prior art, it is not core point of the present invention, therefore repeats no more.

By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.

Claims (16)

1. an offset-feed type satellite tv antenna, it is characterized in that, described offset-feed type satellite tv antenna comprises the metamaterial panel be fixedly attached on vertical wall, described metamaterial panel comprises a side surface by the reflector of wall setting and the core layer being arranged on opposite side surface, reflector, described core layer comprises multiple core layer, the first base material that described core layer comprises sheet and multiple first man-made microstructure be arranged on the first base material, the refraction index profile of described core layer meets following formula:

$n(x,y,0)=n_{\max }-\frac{\mathrm{dis}-v_{\mathrm{segment}}}{\stackrel{\‾}{D}},$

v _segment＝ss+λ*num _segment，

${\mathrm{num}}_{\mathrm{segment}}=\mathrm{floor}\left(\frac{\mathrm{dis}-\mathrm{ss}}{\mathrm{\λ}}\right),$

$\stackrel{\‾}{D}=\frac{\mathrm{\λ}}{n_{\max }-n_{\min }},$

dis＝d ₁+d ₂，

$d_1=\sqrt{x^2+{(y-y_{\mathrm{source}})}^2+z_{\mathrm{source}}^2},$

$d_2=\sin \mathrm{\γ}*(L/2-y),$

$\mathrm{ss}=\sin \mathrm{\γ}*(L/2-y_{\mathrm{virtual}})-\cos \mathrm{\γ}*z_{\mathrm{virtual}},$

Above formula sets up coordinate system in metamaterial panel, wherein metamaterial panel central point is the origin of coordinates (0,0,0), satellite is at the subpoint of described wall, the central point of metamaterial panel and the feed subpoint three point on a straight line at described wall, and the conllinear of described 3 is y-axis, and is just towards satellite in the subpoint direction of described wall, vertical described metamaterial panel is z-axis, and is just outward towards wall;

Wherein, n (x, y, 0) represents the refractive index value of any point in core layer;

L represent core layer by coordinate surface yoz the effective length of cutting;

N _maxrepresent the maximum of the refractive index of core layer;

N _minrepresent the minimum value of the refractive index of core layer;

λ represents the electromagnetic wavelength that satellite tv antenna receives;

γ represents that the electromagnetic wave that sends from particular satellite is when metamaterial panel surface is incident and angle formed by metamaterial panel normal;

Floor represents and rounds downwards;

(x _source, y _source, z _source) represent the coordinate of feed equivalent point;

(x _virtual, y _virtual, z _virtual) represent the coordinate of feed equivalent point relative to the symmetric points of coordinate surface xoy.

2. offset-feed type satellite tv antenna according to claim 1, is characterized in that, described first base material comprises the first prebasal plate and first metacoxal plate of sheet, and described multiple first man-made microstructure is folded between the first prebasal plate and the first metacoxal plate.

3. offset-feed type satellite tv antenna according to claim 2, it is characterized in that, the thickness of described core layer is 0.546mm, wherein, the thickness of the first prebasal plate and the first metacoxal plate is 0.254mm, and the thickness of multiple first man-made microstructure is 0.038mm.

4. offset-feed type satellite tv antenna according to claim 1, it is characterized in that, described metamaterial panel also comprises the impedance matching layer being arranged on core layer one side surface, core layer is between reflector and matching layer, described impedance matching layer comprises multiple impedance matching layer lamella, the second base material that described impedance matching layer lamella comprises sheet and multiple second man-made microstructure be arranged on the second base material, the refraction index profile of described impedance matching layer lamella meets following formula:

$n_i={\left(\frac{n_{\min }+n_{\max }}{2}\right)}^{\frac{m-i}{m}};$

Wherein, i represents the numbering of impedance matching layer lamella, near described core layer impedance matching layer lamella be numbered m, by core layer to z-axis direction, numbering reduce successively, outermost impedance matching layer lamella be numbered 1;

Above-mentioned n _max, n _minbe the maximum of the refractive index of core layer, minimum value.

5. offset-feed type satellite tv antenna according to claim 4, is characterized in that, described second base material comprises the second prebasal plate and second metacoxal plate of sheet, and described multiple second man-made microstructure is folded between the second prebasal plate and the second metacoxal plate.

6. offset-feed type satellite tv antenna according to claim 5, it is characterized in that, the thickness of described impedance matching layer lamella is 0.546mm, wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.254mm, and the thickness of multiple second man-made microstructure is 0.038mm.

7. offset-feed type satellite tv antenna according to claim 6, is characterized in that, the cross section that arbitrary and described metamaterial panel thickness direction is vertical is of similar shape and area.

8. offset-feed type satellite tv antenna according to claim 7, is characterized in that, the cross section vertical with described metamaterial panel thickness direction is square, circular or oval.

9. offset-feed type satellite tv antenna according to claim 6, it is characterized in that, described first man-made microstructure and the second man-made microstructure metal micro structure all for being made up of copper cash or silver-colored line, described metal micro structure by etching, plating, bore quarters, photoetching, electronics carve or ion quarter method be attached to respectively on the first base material and the second base material.

10. offset-feed type satellite tv antenna according to claim 9, it is characterized in that, described metal micro structure is plane flakes, described metal micro structure has the first metal wire and the second metal wire mutually vertically divided equally, described first metal wire is identical with the length of the second metal wire, described first metal wire two ends are connected with two the first metal branch of equal length, described first metal wire two ends are connected on the mid point of two the first metal branch, described second metal wire two ends are connected with two the second metal branch of equal length, described second metal wire two ends are connected on the mid point of two the second metal branch, described first metal branch is equal with the length of the second metal branch.

11. offset-feed type satellite tv antennas according to claim 10, it is characterized in that, each first metal branch of the alabastrine metal micro structure of described plane and the two ends of each second metal branch are also connected with identical 3rd metal branch, and the mid point of corresponding 3rd metal branch is connected with the end points of the first metal branch and the second metal branch respectively.

12. offset-feed type satellite tv antennas according to claim 10, it is characterized in that, first metal wire of the alabastrine metal micro structure of described plane and the second metal wire are provided with two kinks, and the alabastrine metal micro structure of described plane all overlaps with former figure to the figure of any direction 90-degree rotation around the axis perpendicular to the first metal wire and the second metal wire intersection point.

13. 1 kinds of satellite television receiving systems, comprise feed, the tuner connecting feed and the satellite receiver be connected with tuner, it is characterized in that, described satellite television receiving system also comprises the offset-feed type satellite tv antenna as described in claim 1 to 12 any one, described offset-feed type satellite tv antenna is fixedly attached on vertical wall, and described feed is fixed on the vertical wall in house by pole.

14. satellite television receiving systems according to claim 13, is characterized in that, described feed is double-circle polarization corrugated horn, left-hand circular polarization corrugated horn or right-handed circular polarization corrugated horn.

15. satellite television receiving systems according to claim 13, is characterized in that, the incoming frequency of tuner used is 11.7 ~ 12.2GHz, and output frequency is 950 ~ 1450MHz.

16. satellite television receiving systems according to claim 13, is characterized in that, feed three-dimensional used is adjustable.