CN102593598B - Offset feed type satellite television antenna and satellite television receiving system provided by offset feed type satellite television antenna - Google Patents

Abstract

The invention discloses an offset feed type satellite television antenna, comprising a metamaterial panel arranged in back of a feed source, wherein the metamaterial panel comprises a core layer, a reflecting plate arranged on the surface at one side of the core player, and an impedance matching layer arranged on the surface at the other side of the core layer; the core layer comprises two sheet layers of the core layer, which are the same in thickness and refractive index distribution; each sheet layer of the core layer comprises a first sheet-shaped substrate and a plurality of first artificial microstructures arranged on the first substrate; and through accurately designing the refractive index distribution of the sheet layers of the core layer, electromagnetic waves sent out by the feed source can be emitted in a plane wave form after the electromagnetic waves pass through the metamaterial panel. According to the offset feed type satellite television antenna disclosed by the invention, the sheet-shaped metamaterial panel replaces a traditional parabolic antenna, so that the manufacturing and the machining are easier; and furthermore, the whole thickness of the designed metamaterial panel is at a millimeter grade so that the metamaterial panel is very light and thin. Furthermore, the invention further provides a satellite television receiving system provided with the offset feed type satellite television antenna.

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 comprised of parabolic antenna, feed, tuner, satellite receiver.Parabolic antenna is responsible for satellite-signal to reflex to feed and the tuner that is positioned at focus place.Feed be at the focus place of parabolic antenna, arrange one for collecting the loudspeaker of satellite-signal, claim again corrugated horn.Its major function has two: the one, the electromagnetic wave signal of antenna reception is collected, and be transformed into signal voltage, supply high frequency head.The 2nd, the electromagnetic wave receiving is carried out to polarization conversion.Tuner LNB (also claiming frequency demultiplier) is that satellite-signal that feed is sent here carries out frequency reducing and signal and amplifies and be then 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 is exactly after first satellite high-frequency signals being amplified to hundreds thousand of times, to recycle local oscillation circuit high-frequency signals is converted to intermediate frequency 950MHz-2050MHz, is beneficial to the transmission of coaxial cable and the solution mediation work of satellite receiver.Satellite receiver is that the satellite-signal that tuner is transported carries out demodulation, demodulates satellite television image or digital signal and audio signal.

During receiving satellite signal, parallel electromagnetic wave converges on feed after reflecting by parabolic antenna.Conventionally, 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, make trouble, and cost is higher.

Summary of the invention

Technical problem to be solved by this invention is, for the defect that existing satellite tv antenna processing is difficult for, cost is high, to provide a kind of offset-feed type satellite tv antenna simple, low cost of manufacture of processing.

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 super material panel that is arranged on feed rear, described super material panel comprises core layer, be arranged on the reflecting plate of core layer one side surface and be arranged on the impedance matching layer on core layer opposite side surface, described core layer comprises two core layer lamellas that thickness is identical and refraction index profile is identical, each core layer lamella comprises the first base material of sheet and is arranged on a plurality of the first artificial micro-structurals on the first base material, described impedance matching layer comprises two impedance matching layer lamellas that thickness is identical, described impedance matching layer lamella comprises the second base material of sheet and is arranged on a plurality of the second artificial micro-structurals on the second base material, the refraction index profile of described core layer lamella meets following formula:

$n\left(r\right)=n_{\max }-\frac{\sqrt{{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000139699150000051.png"\; state="\{\{state\}\}">r</figure-callout>}}^2+s^2}-\mathrm{Vseg}}{D};$

Vseg＝s+λ×NUMseg；

$\mathrm{NUMseg}=\mathrm{floor}\left\{\frac{\sqrt{{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000139699150000051.png"\; state="\{\{state\}\}">r</figure-callout>}}^2+s^2}-s}{\mathrm{\&lambda;}}\right\};$

$D=\frac{\mathrm{\&lambda;}}{n_{\max }-n_{\min }};$

Wherein, n (r) represents that on core layer lamella, radius is the refractive index value at r place, the refraction index profile center of circle of core layer lamella is feed equivalent point in the projection of super material panel outer surface place plane, and the lower edge of the described center of circle and super material panel is at a distance of sy;

S is that feed equivalent point is to the vertical range of super material panel;

N _maxthe maximum that represents the refractive index of core layer lamella;

N _minthe minimum value that represents the refractive index of core layer lamella;

λ represents that frequency is the electromagnetic wavelength of center of antenna frequency;

Floor represents to round downwards.

Further, described the first base material comprises the first prebasal plate and first metacoxal plate of sheet, and described a plurality of the first artificial micro-structurals are folded between the first prebasal plate and the first metacoxal plate.

Further, the thickness of described core layer lamella is 0.21-2.5mm, and wherein, the thickness of the first prebasal plate is 0.1-1mm, and the thickness of the first metacoxal plate is 0.1-1mm, and the thickness of a plurality of the first artificial micro-structurals is 0.01-0.5mm.

Further, the thickness of described core layer lamella is 0.543mm, and wherein, the thickness of the first prebasal plate and the first metacoxal plate is 0.254mm, and the thickness of a plurality of the first artificial micro-structurals is 0.035mm.

Further, the refraction index profile of described impedance matching layer lamella meets following formula:

$n_i\left(r\right)={n_{\min }}^{\frac{i}{m}}\&times;n{\left(r\right)}^{\frac{m-i}{m}};$

Wherein, n _i(r) represent that on impedance matching layer lamella, radius is the refractive index value at r place, the refraction index profile center of circle of impedance matching layer lamella is feed equivalent point in the projection of corresponding impedance matching layer lamella outer surface place plane;

Wherein, i represents the numbering of impedance matching layer lamella, and near the m that is numbered of the impedance matching layer lamella of feed, by feed, to core layer direction, numbering reduces successively, near 1, the m=2 that is numbered of the impedance matching layer lamella of core layer;

Above-mentioned n _max, n _minidentical with maximum, the minimum value of the refractive index of core layer lamella respectively.

Further, described each impedance matching layer lamella has single refractive index, and the refractive index of a plurality of impedance matching layer lamellas meets following formula:

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

Wherein, m represents total number of plies of impedance matching layer, and i represents the numbering of impedance matching layer lamella, wherein, near the impedance matching layer lamella of core layer, is numbered m, m=2.

Further, it is characterized in that, described the second base material comprises the second prebasal plate and second metacoxal plate of sheet, and described a plurality of the second artificial micro-structurals are folded between the second prebasal plate and the second metacoxal plate.

Further, the thickness of described impedance matching layer lamella is 0.21-2.5mm, and wherein, the thickness of the second prebasal plate is 0.1-1mm, and the thickness of the second metacoxal plate is 0.1-1mm, and the thickness of a plurality of the second artificial micro-structurals is 0.01-0.5mm.

Further, the thickness of described impedance matching layer lamella is 0.543mm, and wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.254mm, and the thickness of a plurality of the second artificial micro-structurals is 0.035mm.

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

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

Further, the lower edge of described super material panel and the upper end of feed are in same level.

Further, the centre frequency of described offset-feed type satellite tv antenna is 11.95GHZ, wherein:

Feed equivalent point is 276.8mm to the vertical range s of super material panel;

The distance sy of the refraction index profile center of circle of core layer lamella and the lower edge of super material panel is 22.3mm;

The angle theta that feed axis becomes with super material panel normal direction is 40 degree;

The number of plies of core layer lamella is 2 layers, and the thickness d 2 of core layer is 1.086mm;

The number of plies of impedance matching layer lamella is 2 layers, and the thickness d 1 of impedance matching layer is 1.086mm;

The maximum n of the refractive index of core layer lamella _maxbe 5.575;

The minimum value n of the refractive index of core layer lamella _minbe 1.6355.

Further, described the first artificial micro-structural and the second artificial micro-structural be the metal micro structure for consisting of copper cash or silver-colored line all, and described metal micro structure is attached to respectively on the first base material and the second base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.

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

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

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

According to offset-feed type satellite tv antenna of the present invention, by the refraction index profile of accurate design core layer, the plane wave of special angle can be converged at feed place after super material panel, therefore can replace traditional parabolic antenna by the super material panel of sheet, manufacturing processing is more prone to, cost is cheaper, and the super material panel integral thickness of design is in millimeter rank according to this in addition, and suitable is frivolous.

The present invention also provides a kind of satellite television receiving system, comprise feed, the tuner that connects feed and the satellite receiver being connected with tuner, described satellite television receiving system also comprises above-mentioned offset-feed type satellite tv antenna, and described offset-feed type satellite tv antenna is arranged on the rear of feed.

Accompanying drawing explanation

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

Fig. 2 is the perspective diagram of one of them super material cell of core layer lamella of the present invention;

Fig. 3 is the structural representation of core layer lamella of the present invention;

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

Fig. 5 is the schematic diagram of the alabastrine metal micro structure of plane of the present invention;

Fig. 6 is a kind of derived structure of the alabastrine metal micro structure of plane shown in Fig. 5;

Fig. 7 is a kind of distressed structure of the alabastrine metal micro structure of plane shown in Fig. 5.

Fig. 8 is first stage of differentiation of the topology of the alabastrine metal micro structure of plane;

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

Figure 10 is the structural representation of the offset-feed type satellite tv antenna of the another kind of embodiment of the present invention;

Figure 11 is the structural representation of the satellite television receiving system of an embodiment of the present invention;

Figure 12 is the satellite tv antenna of an embodiment of the present invention analogous diagram during as transmitting antenna;

Figure 13 is the satellite tv antenna of an embodiment of the present invention analogous diagram during as reception antenna.

Embodiment

As shown in Figures 1 to 4, offset-feed type satellite tv antenna according to the present invention comprises the super material panel 100 that is arranged on feed 1 rear, the upper end of the lower edge of described super material panel 100 and feed 1 is in same level, described super material panel 100 comprises core layer 10, be arranged on the reflecting plate 200 on core layer one side surface and be arranged on the impedance matching layer 20 on core layer 10 opposite side surfaces, described core layer 10 comprises two core layer lamellas 11 that thickness is identical and refraction index profile is identical, described core layer lamella comprises the first base material 13 of sheet and is arranged on a plurality of the first artificial micro-structurals 12 on the first base material 13, described impedance matching layer 20 comprises two impedance matching layer lamellas 21 that thickness is identical, described impedance matching layer lamella 21 comprises the second base material 23 of sheet and is arranged on a plurality of the second artificial micro-structurals on the second base material, the axis Z2 of feed axis Z1 and super material panel 100 has certain angle theta, be axis Z1 in Fig. 1 and the angle (parallel lines that Z3 is Z1) of straight line Z3, feed 1 is not on the Z2 of the axis of super material panel 100, realized the offset-fed of antenna.Feed is traditional corrugated horn in addition.In addition, in the present invention, reflecting plate is to have smooth surperficial metallic reflection plate, and such as copper coin, aluminium sheet or the iron plate etc. that can be polishing, also PEC (desired electrical conductor) reflecting surface, can certainly be metal coating.In the present invention, the arbitrary longitudinal section of described super material panel 100 is of similar shape and area, and longitudinal section herein refers to section vertical with the axis of super material panel in super material panel.The longitudinal section of described super material panel is square, circular or oval, and preferably, the longitudinal section of described super material panel is square, and the super material panel obtaining so is easily processed, for example the square of 300X300mm or 450X450mm.Circle can be that diameter is 250,300 or the circle of 450mm.The effect of impedance matching layer is to realize from air to core layer 10 impedance matching, to reduce the reflection of electromagnetic wave of air and super material joint, reduces the loss of electromagnetic wave energy, raising satellite TV signal intensity.

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

$n\left(r\right)=n_{\max }-\frac{\sqrt{{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000139699150000051.png"\; state="\{\{state\}\}">r</figure-callout>}}^2+s^2}-\mathrm{Vseg}}{D}---\left(1\right);$

Vseg＝s+λ*NUMseg (2)；

$\mathrm{NUMseg}=\mathrm{floor}\left\{\frac{\sqrt{{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000139699150000051.png"\; state="\{\{state\}\}">r</figure-callout>}}^2+s^2}-s}{\mathrm{\&lambda;}}\right\}---\left(3\right);$

$D=\frac{\mathrm{\&lambda;}}{n_{\max }-n_{\min }}---\left(4\right);$

Wherein, n (r) represents that on core layer lamella, radius is the refractive index value at r place; The refraction index profile center of circle O1 of core layer lamella is feed equivalent point X in the projection of super material panel outer surface place plane, and the lower edge of described center of circle O1 and super material panel is at a distance of sy;

S is that feed equivalent point X is to the vertical range of super material panel; In fact the equivalent point X of feed is exactly the feedback point (point focusing on occurs electromagnetic wave in feed) of antenna herein; When the angle theta of the axis Z2 of feed axis Z1 and super material panel 100 changes, also can there is slight change in s.

N _maxthe maximum that represents the refractive index of core layer lamella;

N _minthe minimum value that represents the refractive index of core layer lamella;

λ represents that frequency is the electromagnetic wavelength of center of antenna frequency;

Floor represents to round downwards, for example, when

(r is in a certain number range) is more than or equal to 0 and is less than at 1 o'clock, and NUMseg gets 0, when

(r is in a certain number range) is more than or equal to 1 and is less than at 2 o'clock, and NUMseg gets 1, and the rest may be inferred.

By formula (1), to the determined super material panel of formula (4), can make the electromagnetic wave that feed sends can be with the form outgoing of plane wave after super material panel; Equally, as shown in Figure 1, by formula (1), to the determined super material panel of formula (4), can make the electromagnetic wave (can think plane wave while arriving ground) that satellite sends can converge at the equivalent point X place of feed after super material panel; Certainly, when receiving satellite antenna signals, the normal direction of super material panel is towards the satellite that will receive, as for how making the normal direction of super material panel towards the satellite that will receive signal, relate to the problem of traditional satellite antenna debugging, about the adjusting of antenna azimuth and the angle of pitch, it is common practise, no longer states herein.

In the present invention, as shown in Figure 3, described the first base material 13 comprises the first prebasal plate 131 and first metacoxal plate 132 of sheet, and described a plurality of the first artificial micro-structurals 12 are folded between the first prebasal plate 131 and the first metacoxal plate 132.The thickness of described core layer lamella is 0.5-2mm, and wherein, the thickness of the first prebasal plate is 0.5-1mm, and the thickness of the first metacoxal plate is 0.5-1mm, and the thickness of a plurality of the first artificial micro-structurals is 0.01-0.5mm.Preferably, the thickness of described core layer lamella is 0.543mm, and wherein, the thickness of the first prebasal plate and the first metacoxal plate is 0.254mm, and the thickness of a plurality of the first artificial micro-structurals is 0.035mm.

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

$n_i\left(r\right)={n_{\min }}^{\frac{i}{m}}*n{\left(r\right)}^{\frac{m-i}{m}}---\left(5\right);$

Wherein, n _i(r) represent that on impedance matching layer lamella, radius is the refractive index value at r place, the refraction index profile center of circle of impedance matching layer lamella is feed equivalent point in the projection of corresponding impedance matching layer lamella outer surface place plane;

Wherein, i represents the numbering of impedance matching layer lamella, and near the m that is numbered of the impedance matching layer lamella of feed, by feed, to core layer direction, numbering reduces successively, near 1, the m=2 that is numbered of the impedance matching layer lamella of core layer;

Above-mentioned n _max, n _minidentical with maximum, the minimum value of the refractive index of core layer lamella respectively;

Particularly, the impedance matching layer being limited by formula (5), the refraction index profile of the impedance matching layer lamella of close core layer is:

$n_1\left(r\right)={{\mathrm{<figure-callout\; id="1"\; label="n\; min"\; filenames="HDA0000139699150000091.png,HDA0000139699150000101.png"\; state="\{\{state\}\}">n</figure-callout>}}_{\min }}^{\frac{1}{2}}\&times;n{\left(r\right)}^{\frac{1}{2}};$

Its refraction index profile of impedance matching layer near feed is:

n ₂(r)＝n _min；

Certainly, impedance matching layer is not limited to this, and described each impedance matching layer lamella also can have single refractive index, and the refractive index of a plurality of impedance matching layer lamellas meets following formula:

$n\left(i\right)={((n_{\max }+n_{\min })/2)}^{\frac{i}{m}}---\left(6\right);$

Wherein, m represents total number of plies of impedance matching layer, and i represents the numbering of impedance matching layer lamella, wherein, near the impedance matching layer lamella of core layer, is numbered m, m=2.

Particularly, the impedance matching layer being limited by formula (6), the refraction index profile of the impedance matching layer lamella of close core layer is:

n(2)＝(n _max+n _min)/2；

Its refraction index profile of impedance matching layer near feed is:

$n\left(1\right)={((n_{\max }+n_{\min })/2)}^{\frac{1}{2}};$

In the present invention, described the second base material 23 comprises the second prebasal plate 231 and second metacoxal plate 232 of sheet, and described a plurality of the second artificial micro-structurals are folded between the second prebasal plate 231 and the second metacoxal plate 232.The thickness of described impedance matching layer lamella is 0.21-2.5mm, and wherein, the thickness of the first prebasal plate is 0.1-1mm, and the thickness of the first metacoxal plate is 0.1-1mm, and the thickness of a plurality of the first artificial micro-structurals is 0.01-0.5mm.Preferably, the thickness of described impedance matching layer lamella is 0.543mm, and wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.254mm, and the thickness of a plurality of the second artificial micro-structurals is 0.035mm.

In the present invention, the arbitrary longitudinal section of described super material panel is of similar shape and area, and 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 super material panel in super material panel.The longitudinal section of described super material panel is square, circular or oval, and preferably, the longitudinal section of described super material panel is square, and the super material panel obtaining so is easily processed.Preferably, the longitudinal section of super material panel of the present invention is that the length of side is the square of 450mm.

In one embodiment of the invention, described offset-feed type satellite tv antenna has following parameter:

The centre frequency of described offset-feed type satellite tv antenna is 11.95GHZ; Working frequency range is 11.7 to 12.2;

Feed equivalent point is 276.8mm to the vertical range s of super material panel;

The distance sy of the refraction index profile center of circle of core layer lamella and the lower edge of super material panel is 22.3mm;

The angle theta that feed axis becomes with super material panel normal direction is 40 degree;

The number of plies of core layer lamella is 2 layers, and the thickness d 2 of core layer is 1.086mm;

The number of plies of impedance matching layer lamella is 2 layers, and the thickness d 1 of impedance matching layer is 1.086mm;

The maximum n of the refractive index of core layer lamella _maxbe 5.575;

The minimum value n of the refractive index of core layer lamella _minbe 1.6355.

(feed is as radiation source when using as transmitting antenna to possess the offset-feed type satellite tv antenna of above-mentioned parameter, the effect of super material panel is the form outgoing with plane wave after super material panel of plane wave that feed is sent), as shown in figure 12, can find out that outgoing wave has plane wave phenomenon clearly.

(feed is as wave collecting device when using as reception antenna to possess the offset-feed type satellite tv antenna of above-mentioned parameter, the effect of super material panel is the electromagnetic wave sending from satellite (can think plane wave while arriving ground) to be converged to after super material panel to the some effect point of feed), as shown in figure 13, can find out and in the position of feed equivalent point, have electromagnetic wave converging phenomenon clearly.

Design sketch shown in Figure 12 and Figure 13 can obtain by simulation softwares such as CST, MATLAB, COMSOL.

The relative position of feed equivalent point X and super material panel is determined jointly by s, θ and sy, conventionally, feed equivalent point is to be selected on the Z1 of feed axis, the position of feed equivalent point is relevant with the bore of feed, can be for example and the position (ds be distance that X point in Fig. 1 to Y order) of feed bore mid point Y at a distance of ds, as an embodiment, described ds equals 5mm, in fact in design, ds is relevant with θ, along with the difference of θ, feed equivalent point X position is also different, be that ds is different, still, feed equivalent point is still on the Z1 of feed axis.

In the present invention, described the first artificial micro-structural, the second artificial micro-structural be the metal micro structure for consisting of copper cash or silver-colored line all, and described metal micro structure is attached to respectively the first base material, the second base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.Preferably, described the first artificial micro-structural, the second artificial micro-structural are the alabastrine metal micro structure of the plane shown in Fig. 5 and by topology, develop the metal micro structure of a plurality of different topology obtaining.

In the present invention, core layer lamella can obtain by the following method, on any one surface of the first prebasal plate and the first metacoxal plate, cover copper, by etching method, obtain a plurality of the first metal micro structures (shape of a plurality of the first metal micro structures with arrange obtain by Computer Simulation in advance) again, finally the first prebasal plate and the first metacoxal plate are pressed together respectively, obtain core layer lamella of the present invention, the method of 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, impedance matching layer lamella also can utilize identical method to obtain.Then respectively by a plurality of core layer lamella pressing one, formed core layer of the present invention; Equally, by a plurality of impedance matching layer lamella pressing one, formed impedance matching layer of the present invention; Core layer, impedance matching layer, reflecting plate pressing one are obtained to super material panel of the present invention.

In the present invention, described the first base material, the second base material are made by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material etc.Macromolecular material is available F4B composite material, FR-4 composite material etc.

Figure 5 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 mutually vertically dividing equally, described the first metal wire J1 is identical with the length of the second metal wire J2, described the first metal wire J1 two ends are connected with two the first F1 of metal branch of equal length, described the first metal wire J1 two ends are connected on the mid point of two the first F1 of metal branch, described the second metal wire J2 two ends are connected with two the second F2 of metal branch of equal length, described the second metal wire J2 two ends are connected on the mid point of two the second F2 of metal branch, described the first F1 of metal branch and the second F2's of metal branch is equal in length.

Fig. 6 is a kind of derived structure of the alabastrine metal micro structure of plane shown in Fig. 5.Its two ends at each first F1 of metal branch and each the second F2 of metal branch are all connected with the identical San metal F3 of branch, and the mid point of the corresponding San metal F3 of branch is connected with the end points of the first F1 of metal branch and the 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. 7 is a kind of distressed structure of the alabastrine metal micro structure of plane shown in Fig. 5, the metal micro structure of this kind of 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, 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, the figure to any direction 90-degree rotation all overlaps with former figure around the axis perpendicular to the first metal wire and the second metal wire intersection point to make the metal micro structure shown in Fig. 7.In addition, can also have other distortion, for example, the first metal wire J1 and the second metal wire J2 all arrange a plurality of kink WZ.

In the present invention, described core layer lamella 11 can be divided into a plurality of super material cell D as shown in Figure 2 of array arrangement, each super 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, metacoxal plate unit V, conventionally the length and width height of super material cell D is all not more than 1/5th wavelength, be preferably 1/10th wavelength, therefore, according to the operating frequency of antenna, can determine the size of super material cell D.Fig. 2 is the technique of painting of perspective, and to represent the position in the super material cell D of the first artificial micro-structural, as shown in Figure 2, described the first artificial micro-structural 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 are collectively referred to as electromagnetic parameter.Experiment showed, when electromagnetic wave passes through refractive index dielectric material heterogeneous, can be to the large direction deviation of refractive index.In the situation that relative permeability is certain, (conventionally approach 1), refractive index is only relevant with dielectric constant, at the first base material selected in the situation that, utilize the arbitrary value (within the specific limits) that only can realize super material cell refractive index to first of electric field response the artificial micro-structural, under this center of antenna frequency, utilize simulation software, as CST, MATLAB, COMSOL etc., by emulation, obtain the situation that the dielectric constant of the artificial micro-structural (the alabastrine metal micro structure of plane as shown in Figure 5) of a certain given shape changes along with the refractive index variable of topology, 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.

In the present invention, the structural design of core layer lamella can obtain by Computer Simulation (CST emulation), specific as follows:

(1) that determines the first metal micro structure adheres to base material (the first base material).The medium substrate that for example dielectric constant is 2.25, the material of medium substrate can be FR-4, F4b or PS.

(2) determine the size of super material cell.The size of the size of super material cell is obtained by the centre frequency of antenna, utilizes frequency to obtain its wavelength, then gets and be less than 1/5th a numerical value of wavelength as length C D and the width KD of super material cell D.In the present invention, corresponding to the centre frequency of 11.95G, described super material cell D is the square platelet that 2.8mm, thickness HD are 0.543mm for long CD and wide KD as shown in Figure 2.

(3) determine material and the topological structure of metal micro structure.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. 5, and its live width W is consistent everywhere; Topological structure herein, refers to the basic configuration that topology develops.

(4) determine the topology parameter of metal micro structure.As shown in Figure 5, 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 F1 of metal branch.

(5) determine the differentiation restrictive condition of the topology of metal micro structure.In the present invention, the differentiation restrictive condition of the topology of metal micro structure has, the minimum spacing WL between metal micro structure (as shown in Figure 5, the long limit of metal micro structure and super material cell or the distance of broadside are WL/2), the live width W of metal micro structure, the size of super material cell; Due to 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 it is 2.8mm that super material cell is of a size of long and wide, and thickness is 0.543mm, and now the topology parameter of metal micro structure only has a and two variablees of b.The topology of metal micro structure, by the differentiation mode as shown in Fig. 7 to Fig. 8, for example, corresponding to a certain characteristic frequency (11.95GHZ), can obtain a continuous 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. 5):

First stage: according to developing restrictive condition, in the situation that 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 first stage, as shown in Figure 8, the square JX1 that is W from the length of side, develops into maximum " ten " font topology JD1 gradually in the differentiation of the topology of metal micro structure.In the first stage, along with the differentiation of the topology of metal micro structure, the refractive index of the super material cell corresponding with it increases (respective antenna one characteristic frequency) continuously.

Second stage: according to developing restrictive condition, when a is increased to maximum, a remains unchanged; Now, b is increased continuously to 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, 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 9, from " ten " font topology JD1 of maximum, develop into gradually the alabastrine topology JD2 of maximum plane, the alabastrine topology JD2 of maximum plane herein refers to, the length b of the first J1 of metal branch and the second J2 of metal branch can not extend again, otherwise the first metal branch and the second metal branch will occur to intersect.In second stage, along with the differentiation of the topology of metal micro structure, the refractive index of the super material cell corresponding with it increases (respective antenna one characteristic frequency) continuously.

If obtaining the satisfied design of the variations in refractive index scope needs of super material cell by above-mentioned differentiation (is that this excursion has comprised n _min-n _maxscope).If above-mentioned differentiation obtains the variations in refractive index scope of super material cell, do not meet design needs, for example maximum is too little, changes WL and W, and emulation again, until obtain the variations in refractive index scope that we need.

According to formula (1) to (4), after a series of super material cell that emulation is obtained is arranged according to its corresponding refractive index, (being exactly in fact a plurality of the first artificial micro-structurals arranging on the first base material of different topology shape), can obtain core layer lamella of the present invention.

In like manner, according to formula (5)-(6), can obtain impedance matching layer lamella of the present invention.

Figure 10 is the structural representation of the another kind of embodiment of the present invention.In this enforcement, different is that super 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, between four cell boards 1000, by hinged mode, can fold.Be conducive to like this processing and manufacturing and the installation and maintenance of antenna, the dismountable connection of a plurality of cell boards, or a plurality of cell board can fold by rotating connected mode, makes satellite antenna of the present invention when carrying, and only occupies very little area.The formation of cell board 1000 can have following two kinds of modes:

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

(2) design the overall structure parameter of super material panel, before manufacture, be divided into a plurality of cell boards 1000, to the independent processing and manufacturing of these cell boards.This mode is applicable to superhuge super 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.

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

In addition, as shown in figure 11, the present invention also provides the present invention that a kind of satellite television receiving system is also provided, comprise feed 1, connect the tuner 30 of feed 1 and the satellite receiver being connected by cable with tuner 30 (not indicating in figure) and offset-feed type satellite tv antenna TX of the present invention, described offset-feed type satellite tv antenna TX is arranged on the rear of feed 1.In the present invention, described feed 1 is traditional corrugated horn.Satellite receiver and tuner are also existing technology, no longer state 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 Tongzhou Electronics for example.

Satellite receiver, for example, can adopt the N6188 of Tongzhou Electronics, for receiving the satellite TV signal of No. 9, culminant star.

In addition, in the present invention, as shown in figure 11, satellite television receiving system also comprises the base 40 of supporting antenna and the pole 50 of supporting feed 1 and tuner 30, and described base 40 comprises a portion 401, for the placement of satellite antenna; Described base 40 also comprises the connecting portion 403 of articulated joint 402 and Connection Block portion 401 and articulated joint 402, the back of described super material panel 100 is provided with hinged seat 60, articulated joint 402 can be rotated around hinged seat 60, in order to regulate antenna towards (searching satellite); In addition hinged seat 60 with articulated joint 402 after completing adjusting, an available Bolt to position.Pole 30 one end are fixed on the back of super material panel 100, and the other end connects feed 1 and tuner 30.Feed is also arranged to be connected with pole 50 is rotating in addition, so that adjust at any time the orientation that signal receives.

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; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection of the present invention.

Claims (18)

1. an offset-feed type satellite tv antenna, it is characterized in that, described offset-feed type satellite tv antenna comprises the super material panel that is arranged on feed rear, described super material panel comprises core layer, be arranged on core layer back to the reflecting plate of a side surface of feed and be arranged on the impedance matching layer on core layer opposite side surface, described core layer comprises two core layer lamellas that thickness is identical and refraction index profile is identical, each core layer lamella comprises the first base material of sheet and is arranged on a plurality of the first artificial micro-structurals on the first base material, described impedance matching layer comprises two impedance matching layer lamellas that thickness is identical, described impedance matching layer lamella comprises the second base material of sheet and is arranged on a plurality of the second artificial micro-structurals on the second base material, the refraction index profile of described core layer lamella meets following formula:

$n\left(r\right)=n_{\max }-\frac{\sqrt{r^2+s^2}-\mathrm{Vseg}}{D};$

Vseg＝s+λ×NUMseg；

$\mathrm{NUMseg}=\mathrm{floor}\left\{\frac{\sqrt{r^2+s^2}-s}{\mathrm{\&lambda;}}\right\};$

$D=\frac{\mathrm{\&lambda;}}{n_{\max }-n_{\min }};$

Wherein, n (r) represents that on core layer lamella, radius is the refractive index value at r place, the refraction index profile center of circle of core layer lamella is feed equivalent point in the projection of super material panel outer surface place plane, the described center of circle is positioned at the below of super material panel lower edge, and with the lower edge of super material panel at a distance of sy;

S is that feed equivalent point is to the vertical range of super material panel;

N _maxthe maximum that represents the refractive index of core layer lamella;

N _minthe minimum value that represents the refractive index of core layer lamella;

λ represents that frequency is the electromagnetic wavelength of center of antenna frequency;

Floor represents to round downwards.

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

3. offset-feed type satellite tv antenna according to claim 2, is characterized in that, the thickness of described core layer lamella is 0.21-2.5mm, wherein, the thickness of the first prebasal plate is 0.1-1mm, and the thickness of the first metacoxal plate is 0.1-1mm, and the thickness of a plurality of the first artificial micro-structurals is 0.01-0.5mm.

4. offset-feed type satellite tv antenna according to claim 3, it is characterized in that, the thickness of described core layer lamella is 0.543mm, wherein, the thickness of the first prebasal plate and the first metacoxal plate is 0.254mm, and the thickness of a plurality of the first artificial micro-structurals is 0.035mm.

5. offset-feed type satellite tv antenna according to claim 1, is characterized in that, the refraction index profile of described impedance matching layer lamella meets following formula:

$n_i\left(r\right)={n_{\min }}^{\frac{i}{m}}\&times;n{\left(r\right)}^{\frac{m-i}{m}};$

Wherein, n _i(r) represent that on impedance matching layer lamella, radius is the refractive index value at r place, the refraction index profile center of circle of impedance matching layer lamella is feed equivalent point in the projection of corresponding impedance matching layer lamella outer surface place plane;

Wherein, i represents the numbering of impedance matching layer lamella, and near the m that is numbered of the impedance matching layer lamella of feed, by feed, to core layer direction, numbering reduces successively, near 1, the m=2 that is numbered of the impedance matching layer lamella of core layer;

Above-mentioned n _max, n _minidentical with maximum, the minimum value of the refractive index of core layer lamella respectively.

6. offset-feed type satellite tv antenna according to claim 1, is characterized in that, described each impedance matching layer lamella has single refractive index, and the refractive index of a plurality of impedance matching layer lamellas meets following formula:

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

Wherein, m represents total number of plies of impedance matching layer, and i represents the numbering of impedance matching layer lamella, wherein, near the impedance matching layer lamella of core layer, is numbered m, m=2.

7. according to the offset-feed type satellite tv antenna described in claim 5 or 6, it is characterized in that, described the second base material comprises the second prebasal plate and second metacoxal plate of sheet, and described a plurality of the second artificial micro-structurals are folded between the second prebasal plate and the second metacoxal plate.

8. offset-feed type satellite tv antenna according to claim 7, it is characterized in that, the thickness of described impedance matching layer lamella is 0.21-2.5mm, wherein, the thickness of the second prebasal plate is 0.1-1mm, the thickness of the second metacoxal plate is 0.1-1mm, and the thickness of a plurality of the second artificial micro-structurals is 0.01-0.5mm.

9. offset-feed type satellite tv antenna according to claim 8, it is characterized in that, the thickness of described impedance matching layer lamella is 0.543mm, wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.254mm, and the thickness of a plurality of the second artificial micro-structurals is 0.035mm.

10. offset-feed type satellite tv antenna according to claim 5, is characterized in that, the parallel cross section of arbitrary and described super material panel is of similar shape and area.

11. offset-feed type satellite tv antennas according to claim 10, is characterized in that, the cross section parallel with described super material panel is square, circular or oval.

12. according to the offset-feed type satellite tv antenna described in claim 5 or 10, it is characterized in that, the lower edge of described super material panel and the upper end of feed are in same level.

13. offset-feed type satellite tv antennas according to claim 12, is characterized in that, the centre frequency of described offset-feed type satellite tv antenna is 11.95GHZ, wherein:

Feed equivalent point is 276.8mm to the vertical range s of super material panel;

The distance sy of the refraction index profile center of circle of core layer lamella and the lower edge of super material panel is 22.3mm;

The angle theta that feed axis becomes with super material panel normal direction is 40 degree;

The number of plies of core layer lamella is 2 layers, and the thickness d 2 of core layer is 1.086mm;

The number of plies of impedance matching layer lamella is 2 layers, and the thickness d 1 of impedance matching layer is 1.086mm;

The maximum n of the refractive index of core layer lamella _maxbe 5.575;

The minimum value n of the refractive index of core layer lamella _minbe 1.6355.

14. offset-feed type satellite tv antennas according to claim 1, it is characterized in that, described the first artificial micro-structural and the second artificial micro-structural be the metal micro structure for consisting of copper cash or silver-colored line all, and described metal micro structure is attached to respectively on the first base material and the second base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.

15. offset-feed type satellite tv antennas according to claim 14, 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 of mutually vertically dividing equally, described the first metal wire is identical with the length of the second metal wire, described the first metal wire two ends are connected with two the first metal branches of equal length, described the first metal wire two ends are connected on the mid point of two the first metal branches, described the second metal wire two ends are connected with two the second metal branches of equal length, described the second metal wire two ends are connected on the mid point of two the second metal branches, described the first metal branch and the second metal branch equal in length.

16. offset-feed type satellite tv antennas according to claim 15, it is characterized in that, each the first metal branch of the alabastrine metal micro structure of described plane and the two ends of each the second metal branch are also connected with identical San metal branch, and the mid point of corresponding San metal branch is connected with the end points of the first metal branch and the second metal branch respectively.

17. offset-feed type satellite tv antennas according to claim 15, it is characterized in that, the first metal wire of the alabastrine metal micro structure of described plane and the second metal wire are provided with two kinks, and around the axis perpendicular to the first metal wire and the second metal wire intersection point, the figure to any direction 90-degree rotation all overlaps with former figure the alabastrine metal micro structure of described plane.

18. 1 kinds of satellite television receiving systems, comprise feed, the tuner that connects feed and the satellite receiver being 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 17 any one, and described offset-feed type satellite tv antenna is arranged on the rear of feed.

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