CN102683875A - 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, DVB.Parabolic antenna is responsible for satellite-signal is reflexed to feed and the tuner that is positioned at along.Feed is loudspeaker that are used to collect satellite-signal in the along setting of parabolic antenna, claims corrugated horn again.Its major function has two: the one, and the electromagnetic wave signal that antenna is received collects, and is transformed into signal voltage, the supply high frequency head.The 2nd, the electromagnetic wave that receives is carried out polarization conversion.Tuner LNB (also claiming frequency demultiplier) carries out frequency reducing and signal with the satellite-signal that feed is sent here to amplify and be sent to DVB then.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 is exactly to utilize local oscillation circuit that high-frequency signals is converted to intermediate frequency 950MHz-2050MHz again after earlier the satellite high-frequency signals being amplified to hundreds thousand of times, is beneficial to the transmission of coaxial cable and the mediation work of separating of DVB.DVB is that the satellite-signal that tuner transports is carried out demodulation, demodulates satellite television image or digital signal and audio signal.

During receiving satellite signal, parallel electromagnetic wave (plane wave) converges on the feed after reflecting through parabolic antenna.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 big, required precision is also high, therefore, makes trouble, cost is higher, and consistency of product is relatively poor.

Summary of the invention

Technical problem to be solved by this invention is, to the defective that existing satellite tv antenna processing is difficult for, cost is high and homogeneity of product is relatively poor, a kind of simple, low cost of manufacture and high offset-feed type satellite tv antenna of homogeneity of product processed is provided.

The technical solution adopted for the present invention to solve the technical problems is: a kind of offset-feed type satellite tv antenna; Said offset-feed type satellite tv antenna comprises the ultra material panel that fixedly is attached on the vertical wall; Said ultra material panel comprises the core layer that a side surface leans on the reflector of wall setting and is arranged on opposite side surface, reflector; Said core layer comprises a plurality of core layer lamellas; Said core layer lamella comprises first base material of sheet and is arranged on a plurality of first artificial micro-structural on first base material that the refraction index profile of said core layer lamella satisfies following formula:

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

v _segment＝ss+λ*num _segment，

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

$\stackrel{\‾}{D}=\frac{1}{n_{\max }-n_{\min }},$

dis＝d ₁+d ₂，

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

d ₂＝sinγ*(L/2-y)，

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

Above formula is on ultra material panel, to set up coordinate system, and wherein ultra material panel central point is the origin of coordinates (0,0; 0); Satellite is at the central point of the subpoint of said wall, ultra material panel and the feed subpoint three point on a straight line at said wall, and said 3 conllinear is the y axle, and towards satellite in the subpoint direction of said wall for just; Vertical said ultra material panel is the z axle, and outside wall for just;

Wherein, the refractive index value of any arbitrarily on n (x, y, 0) the expression core layer lamella;

L representes the effective length that the core layer lamella is cut by coordinate surface yoz;

n _MaxThe maximum of the refractive index of expression core layer lamella;

n _MinThe minimum value of the refractive index of expression core layer lamella;

λ representes the electromagnetic wavelength that satellite tv antenna receives;

The angle that the electromagnetic wave that γ representes to send from particular satellite is become with ultra material panel normal during incident on ultra material panel surface;

Floor representes to round downwards;

(x _Source, y _Source, z _Source) coordinate of expression feed equivalent point;

(x _Virtual, y _Virtual, z _Virtual) expression feed equivalent point is with respect to the coordinate of the symmetric points of coordinate surface xoy.

Further, said first base material comprises first prebasal plate and first metacoxal plate of sheet, and the said a plurality of first artificial micro-structural is folded between first prebasal plate and first metacoxal plate.

Further, the thickness of said core layer lamella is 0.546mm, and wherein, the thickness of first prebasal plate and first metacoxal plate is 0.254mm, and the thickness of a plurality of first artificial micro-structurals is 0.038mm.

Further; Said ultra material panel also comprises the impedance matching layer that is arranged on core layer opposite side surface; Said impedance matching layer comprises a plurality of impedance matching layer lamellas; Said impedance matching layer lamella comprises second base material of sheet and is arranged on a plurality of second artificial micro-structural on second base material that the refraction index profile of said impedance matching layer lamella satisfies following formula:

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

Wherein, i representes the numbering of impedance matching layer lamella, and near the m that is numbered of the impedance matching layer lamella of said core layer, to the z direction of principal axis, numbering reduces successively by core layer, outermost impedance matching layer lamella be numbered 1;

Above-mentioned n _Max, n _MinBe maximum, the minimum value of the refractive index of core layer lamella.

Further, said second base material comprises second prebasal plate and second metacoxal plate of sheet, and the said a plurality of second artificial micro-structural is folded between second prebasal plate and second metacoxal plate.

Further, the thickness of said impedance matching layer lamella is 0.546mm, and wherein, the thickness of second prebasal plate and second metacoxal plate is 0.254mm, and the thickness of a plurality of second artificial micro-structurals is 0.038mm.

Further, the arbitrary longitudinal section of said ultra material panel is of similar shape and area.

Further, the longitudinal section of said ultra material panel is square, circular or oval.

Further; The said first artificial micro-structural and the second artificial micro-structural be the metal micro structure for being made up of copper cash or silver-colored line all, said metal micro structure through etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method respectively attached on first base material and second base material.

Further; Said metal micro structure is the plane flakes; Said metal micro structure 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; Each the first metal branch of the alabastrine metal micro structure 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; 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.

According to offset-feed type satellite tv antenna of the present invention, replaced traditional parabolic antenna by the ultra material panel of sheet, to make processing and be more prone to, cost is cheaper; And consistency of product is high, and simultaneously, offset-feed type satellite tv antenna of the present invention directly is attached on the vertical wall in house, does not take up room; Do not need complicated support yet, save cost further, and install simple; For example, can directly follow closely on wall with nail, or fasten with glue on wall.And the design that antenna is attached at wall has solved the windage problem of traditional parabolic antenna effectively.

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

A kind of satellite television receiving system; Comprise feed, connect the tuner of feed and the DVB that is connected with tuner; Said satellite television receiving system also comprises above-mentioned offset-feed type satellite tv antenna; Said offset-feed type satellite tv antenna fixedly is attached on the vertical wall, and said feed passes through strut fixation on the vertical wall in house.

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

Further, used feed three-dimensional is adjustable.

Description of drawings

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 ultra material cell of core layer lamella of the present invention;

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

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

Fig. 6 is the sketch map of the alabastrine metal micro structure in plane of the present invention;

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

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

Fig. 9 is phase I of differentiation of the topology of the alabastrine metal micro structure in plane;

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

Extremely shown in Figure 5 like Fig. 1; Structural representation for the offset-feed type satellite tv antenna of first embodiment of the invention; Said offset-feed type satellite tv antenna comprises the ultra material panel 100 that fixedly is attached on the vertical wall NQ; The upper end of the lower edge of said ultra material panel 100 and feed 1 is in same level, said ultra material panel 100 comprise a side surface lean on the wall setting reflector 200, be arranged on the core layer 10 on 200 opposite sides surface, reflector and the impedance matching layer 20 on core layer opposite side surface be set.Feed 1 is traditional corrugated horn, and this polarization mode difference according to the TV signal of satellite has different selections, and for example No. 9, culminant star, and the existing left-hand circular polarization of its TV signal has right-handed circular polarization again, so feed should adopt the corrugated horn of double-circle polarization.In addition, among the present invention, the reflector is the metallic reflection plate with smooth surface, for example can be copper coin, aluminium sheet or the iron plate etc. of polishing, and also PEC (desired electrical conductor) reflecting surface can certainly be a metal coating.In the present embodiment; Said ultra material panel 100 arbitrary longitudinal sections are of similar shape and area; Be that core layer and matching layer are of similar shape the longitudinal section with area, the longitudinal section here is meant section vertical with the axis of ultra material panel in the ultra material panel.The longitudinal section of said ultra material panel is square, circular or oval, and preferably, the longitudinal section of said ultra material panel is square, and the ultra material panel that obtains is like this processed easily, for example the square of 450X450mm.Circle can be that diameter is the circle of 450mm.

In the present embodiment, said core layer 10 comprises a plurality of core layer lamellas 11, and said core layer lamella 11 comprises first base material 13 of sheet and is arranged on a plurality of first artificial micro-structural 12 on first base material 13.In the present embodiment, preferably as shown in Figure 4, said first base material 13 comprises first prebasal plate 131 and first metacoxal plate 132 of sheet, and the said a plurality of first artificial micro-structural 12 is folded between first prebasal plate 131 and first metacoxal plate 132.Preferably, the thickness of said core layer lamella 11 is 0.546mm, and wherein, the thickness of first prebasal plate 131 and first metacoxal plate 132 is 0.254mm, and the thickness of a plurality of first artificial micro-structural 12 is 0.038mm.

In the present embodiment; Said impedance matching layer 20 comprises a plurality of impedance matching layer lamellas 21, and said impedance matching layer lamella 21 comprises second base material 23 of sheet and be arranged on a plurality of second artificial micro-structural on second base material 23 (indicating among the figure), preferably; In the present embodiment; As shown in Figure 4, said second base material 23 comprises second prebasal plate 231 and second metacoxal plate 232 of sheet, and the said a plurality of second artificial micro-structural is folded between second prebasal plate 231 and second metacoxal plate 232.Preferably, the thickness of said impedance matching layer lamella is 0.546mm, and wherein, the thickness of second prebasal plate and second metacoxal plate is 0.254mm, and the thickness of a plurality of second artificial micro-structurals is 0.038mm.

In the present embodiment, the refraction index profile of said core layer lamella satisfies 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)，

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

$\stackrel{\‾}{D}=\frac{1}{n_{\max }-n_{\min }}---\left(4\right),$

dis＝d ₁+d ₂(5)，

${\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="HDA0000159129810000021.png"\; state="\{\{state\}\}">d</figure-callout>}}_1=\sqrt{x^2+{\left({y-y}_{\mathrm{source}}\right)}^2+z_{\mathrm{source}}^2}---\left(6\right),$

d ₂＝sinγ*(L/2-y) (7)，

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

Above formula is on ultra material panel, to set up coordinate system, and wherein ultra material panel central point is origin of coordinates O (0,0; 0); Satellite is at the central point of the subpoint of said wall, ultra material panel and the feed subpoint three point on a straight line at said wall, and said 3 conllinear is the y axle, and towards satellite in the subpoint direction of said wall for just; Vertical said ultra material panel is the z axle, and outside wall for just;

Wherein, the refractive index value of any arbitrarily on n (x, y, 0) the expression core layer lamella;

L representes the effective length that the core layer lamella is cut by coordinate surface yoz;

n _MaxThe maximum of the refractive index of expression core lamella;

n _MinThe minimum value of the refractive index of expression core lamella;

λ representes the electromagnetic wavelength that satellite tv antenna receives;

The angle that the electromagnetic wave that γ representes to send from particular satellite is become with ultra material panel normal during incident on ultra material panel surface;

Floor representes to round downwards;

P ₁(x _Source, y _Source, z _Source) coordinate of expression feed equivalent point;

P ₁' (x _Virtual, y _Virtual, z _Virtual) expression feed equivalent point is with respect to the coordinate of the symmetric points of coordinate surface xoy.

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

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

Wherein, i representes the numbering of impedance matching layer lamella, and near the m that is numbered of the impedance matching layer lamella of said core layer, to the z direction of principal axis, numbering reduces successively by core layer, outermost impedance matching layer lamella be numbered 1;

Above-mentioned n _Max, n _MinBe maximum, the minimum value of the refractive index of core layer lamella.

In the present embodiment; The said first artificial micro-structural, the second artificial micro-structural be the metal micro structure for being made up of copper cash or silver-colored line all, said metal micro structure through etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method respectively attached to first base material, second base material.Preferably, the said first artificial micro-structural, the second artificial micro-structural are the alabastrine metal micro structure in plane shown in Figure 6 develops a plurality of different topology that obtains through topology metal micro structure.

In the present embodiment; The core layer lamella can obtain through following method, promptly on any one surface of first prebasal plate and first metacoxal plate, covers copper, obtains a plurality of first metal micro structures (shape of a plurality of first metal micro structures with arrange in advance through the Computer Simulation acquisition) through etching method again; At last first prebasal plate and first metacoxal plate are pressed together respectively; Promptly obtain core layer lamella of the present invention, the method for pressing can be direct hot pressing, also can be to utilize PUR to connect; Certainly also other mechanical connection, for example bolt connects.

In like manner, the impedance matching layer lamella also can utilize identical method to obtain.Respectively with a plurality of core layer lamella pressing one, promptly formed core layer of the present invention then; Equally, with a plurality of impedance matching layer lamella pressing one, promptly formed impedance matching layer of the present invention; Core layer, impedance matching layer pressing one are promptly obtained ultra material panel of the present invention.

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

Shown in Figure 6 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. 7 is a kind of derived structure of the alabastrine metal micro structure in plane shown in Figure 6.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. 8 is a kind of distressed structure of the alabastrine metal micro structure in plane shown in Figure 6; 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 8 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.

In the present embodiment; Said core layer lamella 11 can be divided into the ultra material cell D a plurality of as shown in Figure 3 of array arrangement; Each ultra material cell D comprises prebasal plate unit U, metacoxal plate unit V and is arranged on the first artificial micro-structural 12 between base board unit U, the metacoxal plate unit V that the length and width height of ultra material cell D all is not more than 1/5th wavelength usually, is preferably 1/10th wavelength; Therefore, can confirm the size of ultra material cell D according to the operating frequency of antenna.Fig. 3 is the technique of painting of perspective, and as shown in Figure 3 with the position among the ultra material cell D that representes the first artificial micro-structural, the said first artificial micro-structural is sandwiched between base board unit U, the metacoxal plate unit V, and its surface, place is represented with SR.

Known refractive index

wherein μ is a relative permeability; ε is a relative dielectric constant, and μ and ε close and be called electromagnetic parameter.Experiment showed, when electromagnetic wave passes through refractive index dielectric material heterogeneous, can be to the big direction deviation of refractive index.Under the certain situation of relative permeability (usually near 1); Refractive index is only relevant with dielectric constant, under the situation that first base material is selected, utilizes the arbitrary value (within the specific limits) that only can realize ultra material cell refractive index to the first artificial micro-structural of electric field response; Under this center of antenna frequency (12.5GHZ); Utilize simulation software,, obtain the situation that the dielectric constant of the artificial micro-structural (the alabastrine metal micro structure in plane as shown in Figure 6) of a certain given shape changes along with the refractive index variable of topology through emulation like CST, MATLAB, COMSOL etc.; Can list data one to one; The core layer lamella 11 that the specific refractive index that can design us needs distributes in like manner can obtain the refraction index profile of impedance matching layer lamella, thereby obtain the refraction index profile of whole ultra material panel 100.

In the present embodiment, the structural design of core layer lamella can obtain through Computer Simulation (CST emulation), and is specific as follows:

That (1) confirms first metal micro structure adheres to base material (first base material).Among the present invention, first prebasal plate of said first base material adopts identical PS plate with first metacoxal plate, and described PS plate has a predetermined dielectric constant, and for example dielectric constant is 2.7 PS plate.

(2) size of definite ultra material cell.The size of the size of ultra material cell is obtained by the centre frequency of antenna, utilizes frequency to obtain its wavelength, gets less than 1/5th a numerical value of wavelength length C D and the width KD as ultra material cell D again.Among the present invention, said ultra material cell D is that long CD and wide KD as shown in Figure 3 is 2.8mm, thickness HD is the square platelet of 0.546mm.

(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 6, 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 6, 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.Among the present invention; 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 9, 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.During emulation for the first time, WL can get 0.1mm, and W can get 0.3mm, and ultra material cell is of a size of the long and wide 2.8mm that is, thickness is 0.546mm, and this moment, the topology parameter of metal micro structure had only a and two variablees of b.The topology of metal micro structure through as Fig. 9 differentiation mode shown in Figure 10 extremely, corresponding to a certain CF (for example 11.95GHZ), can obtain a continuous variations in refractive index scope.

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 6):

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).Therefore, in the phase I, the differentiation of the topology of metal micro structure is as shown in Figure 9, is the square JX1 of W from the length of side promptly, develops into maximum " ten " font topology JD1 gradually.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).Therefore; In second stage, the differentiation of the topology of metal micro structure is shown in figure 10, 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.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.

If it (is that this excursion has comprised n that the variations in refractive index scope that obtains ultra material cell through above-mentioned differentiation satisfies design demand _Min-n _MaxScope).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.

According to formula (1) to (9); After a series of ultra material cell that emulation is obtained is arranged according to its corresponding refractive index (in fact being exactly a plurality of first artificial micro-structural the arranging on first base material of different topology shape), can obtain the core layer lamella of present embodiment.

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

In addition, the present invention also has second kind of embodiment, and the places different with first embodiment are that ultra material panel includes only core layer and reflector, does not have impedance matching layer.Other first embodiment is identical, repeats no more.

According to offset-feed type satellite tv antenna of the present invention, replaced traditional parabolic antenna by the ultra material panel of sheet, to make processing and be more prone to, cost is cheaper; And consistency of product is high, and simultaneously, offset-feed type satellite tv antenna of the present invention directly is attached on the vertical wall in house, does not take up room; Do not need complicated support yet, save cost further, and install simple; For example, can directly follow closely on wall with nail, or fasten with glue on wall.And the design that antenna is attached at wall has solved the windage problem of traditional parabolic antenna effectively.

Figure 11 is the structural representation of the another kind of embodiment of the present invention.In this enforcement, different is that ultra material panel 100 is divided into four cell boards 1000, and the longitudinal section of each cell board is that the length of side is the square of 200mm, through hinged mode, can fold between four cell boards 1000.Help the processing and manufacturing and the installation and maintenance of antenna like this, the dismountable connection of a plurality of cell boards, perhaps a plurality of cell boards can fold through rotating connected mode, make satellite antenna of the present invention when carrying, and only occupy very little area.The formation of cell board 1000 can have following dual mode:

(1) isolate in flakes after the whole processing, this mode is fit to the ultra material flat board of less area.

(2) design the overall structure parameter of ultra material panel, before manufacturing, be about to it and be divided into a plurality of cell boards 1000, the independent processing and manufacturing of these cell boards.This mode is fit to superhuge ultra material panel processing very much.

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

A plurality of cell board 1000 dismountable connections for example can be that bolt connects, bonding, buckle connection etc.In the present embodiment, preferably, a plurality of cell boards 1000 can fold through rotating connected mode.

In addition; As shown in Figure 2, the present invention also provides the present invention that a kind of satellite television receiving system also is provided, and comprises feed 1, connects the tuner 30 of feed 1 and DVB that is connected through cable with tuner 30 (not indicating among the figure) and offset-feed type satellite tv antenna TX of the present invention; Said offset-feed type satellite tv antenna TX fixedly is attached on the vertical wall NQ; Said feed 1 is fixed on the vertical wall in house through pole 40, and pole 40 can directly be inserted wall, also can be shown in figure 11; Fixing mount pad 50 on wall is fixed on pole 40 on the mount pad more earlier.Among the present invention; Said feed 1 is double-circle polarization corrugated horn, left-hand circular polarization corrugated horn or right-handed circular polarization corrugated horn; For example receive the satellite television programming of No. 9, culminant star; Need to be equipped with the feed (because No. 9 existing left-hand circular polarizations of satellite television programming of culminant star have right-handed circular polarization again) of double-circle polarization.DVB and tuner also are existing technology, no longer detail here.

In addition, among the present invention, the incoming frequency of used tuner 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 Tongzhou Electronics for example.

Receiver for example can adopt the N6188 of Tongzhou Electronics, is used to receive the satellite TV signal of No. 9, culminant star.Receiver is placed on indoor usually.

In addition, feed of the present invention preferably, can be realized three-dimensional adjustable.With to different regions, do fine setting.Feed three-dimensional adjustable can also can be provided with mechanical structure in the part that pole 40 is connected with feed through realization free to rotate between pole 40 and the mount pad 50 is set, but makes the relative pole Three dimensional rotation of feed.Have a lot of mechanical connection mechanisms that realize this function in the prior art, it is not a core point of the present invention, so repeat no more.

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 (16)

1. offset-feed type satellite tv antenna; It is characterized in that; Said offset-feed type satellite tv antenna comprises the ultra material panel that fixedly is attached on the vertical wall; Said ultra material panel comprises the core layer that a side surface leans on the reflector of wall setting and is arranged on opposite side surface, reflector; Said core layer comprises a plurality of core layer lamellas, and said core layer lamella comprises first base material of sheet and be arranged on a plurality of first artificial micro-structural on first base material that the refraction index profile of said core layer lamella satisfies following formula:

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

v _segment＝ss+λ*num _segment，

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

$\stackrel{\&OverBar;}{D}=\frac{1}{n_{\max }-n_{\min }},$

dis＝d ₁+d ₂，

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

d ₂＝sinγ*(L/2-y)，

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

Above formula is on ultra material panel, to set up coordinate system, and wherein ultra material panel central point is the origin of coordinates (0,0; 0); Satellite is at the central point of the subpoint of said wall, ultra material panel and the feed subpoint three point on a straight line at said wall, and said 3 conllinear is the y axle, and towards satellite in the subpoint direction of said wall for just; Vertical said ultra material panel is the z axle, and outside wall for just;

Wherein, the refractive index value of any arbitrarily on n (x, y, 0) the expression core layer lamella;

L representes the effective length that the core layer lamella is cut by coordinate surface yoz;

n _MaxThe maximum of the refractive index of expression core layer lamella;

n _MinThe minimum value of the refractive index of expression core layer lamella;

λ representes the electromagnetic wavelength that satellite tv antenna receives;

The angle that the electromagnetic wave that γ representes to send from particular satellite is become with ultra material panel normal during incident on ultra material panel surface;

Floor representes to round downwards;

(x _Source, y _Source, z _Source) coordinate of expression feed equivalent point;

(x _Virtual, y _Virtual, z _Virtual) expression feed equivalent point is with respect to the coordinate of the symmetric points of coordinate surface xoy.

2. offset-feed type satellite tv antenna according to claim 1 is characterized in that, said first base material comprises first prebasal plate and first metacoxal plate of sheet, and the said a plurality of first artificial micro-structural is folded between first prebasal plate and first metacoxal plate.

3. offset-feed type satellite tv antenna according to claim 2; It is characterized in that the thickness of said core layer lamella is 0.546mm, wherein; The thickness of first prebasal plate and first metacoxal plate is 0.254mm, and the thickness of a plurality of first artificial micro-structurals is 0.038mm.

4. offset-feed type satellite tv antenna according to claim 1; It is characterized in that; Said ultra material panel also comprises the impedance matching layer that is arranged on core layer opposite side surface; Said impedance matching layer comprises a plurality of impedance matching layer lamellas, and said impedance matching layer lamella comprises second base material of sheet and be arranged on a plurality of second artificial micro-structural on second base material that the refraction index profile of said impedance matching layer lamella satisfies following formula:

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

Wherein, i representes the numbering of impedance matching layer lamella, and near the m that is numbered of the impedance matching layer lamella of said core layer, to the z direction of principal axis, numbering reduces successively by core layer, outermost impedance matching layer lamella be numbered 1;

Above-mentioned n _Max, n _MinBe maximum, the minimum value of the refractive index of core layer lamella.

5. offset-feed type satellite tv antenna according to claim 4 is characterized in that, said second base material comprises second prebasal plate and second metacoxal plate of sheet, and the said a plurality of second artificial micro-structural is folded between second prebasal plate and second metacoxal plate.

6. offset-feed type satellite tv antenna according to claim 5; It is characterized in that the thickness of said impedance matching layer lamella is 0.546mm, wherein; The thickness of second prebasal plate and second metacoxal plate is 0.254mm, and the thickness of a plurality of second artificial micro-structurals is 0.038mm.

7. offset-feed type satellite tv antenna according to claim 6 is characterized in that, the arbitrary longitudinal section of said ultra material panel is of similar shape and area.

8. offset-feed type satellite tv antenna according to claim 7 is characterized in that, the longitudinal section of said ultra material panel is square, circular or oval.

9. offset-feed type satellite tv antenna according to claim 6; It is characterized in that; The said first artificial micro-structural and the second artificial micro-structural be the metal micro structure for being made up of copper cash or silver-colored line all, said metal micro structure through etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method respectively attached on first base material and second base material.

10. offset-feed type satellite tv antenna according to claim 9; It is characterized in that; Said metal micro structure is the plane flakes; Said metal micro structure 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.

11. offset-feed type satellite tv antenna according to claim 10; It is characterized in that; Each the first metal branch of the alabastrine metal micro structure 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.

12. offset-feed type satellite tv antenna according to claim 10; 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.

13. satellite television receiving system; Comprise feed, connect the tuner of feed and the DVB that is connected with tuner; It is characterized in that; Said satellite television receiving system comprises that also said offset-feed type satellite tv antenna fixedly is attached on the vertical wall like any described offset-feed type satellite tv antenna of claim 1 to 12, and said feed passes through strut fixation on the vertical wall in house.

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

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

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

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