CN102800995B

CN102800995B - Cassegrain metamaterial antenna

Info

Publication number: CN102800995B
Application number: CN201210268554.0A
Authority: CN
Inventors: 刘若鹏; 季春霖; 岳玉涛; 杨青; 殷俊
Original assignee: Kuang Chi Innovative Technology Ltd
Current assignee: Kuang Chi Institute of Advanced Technology
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2015-07-01
Anticipated expiration: 2032-07-31
Also published as: CN102800995A

Abstract

The invention discloses a Cassegrain metamaterial antenna, which comprises a main metamaterial reflector with a central through hole, a feed source arranged in the central through hole, and a secondary metamaterial reflector arranged in front of the feed source, wherein electromagnetic waves radiated by the feed source are sequentially reflected by the secondary metamaterial reflector and the main metamaterial reflector and then are emitted in a plane wave form; the secondary metamaterial reflector has electromagnetic wave reflection characteristics similar to a rotating ellipsoid; the secondary metamaterial reflector has a near focus and a far focus; the far focus is superposed with the phase center of the feed source; and the near focus is superposed with the focus of the main metamaterial reflector. According to the Cassegrain metamaterial antenna, the conventional paraboloid is replaced by the platy main metamaterial reflector, so that the Cassegrain metamaterial antenna is easier to manufacture and process and lower in cost.

Description

A kind of Super-material antenna

Technical field

The present invention relates to the communications field, more particularly, relate to a kind of Super-material antenna.

Background technology

Cassegrain antenna is made up of three parts, i.e. main reflector, subreflector and radiation source.Wherein main reflector is the paraboloid of revolution, and subreflector is hyperboloid of revolution reflector.Structurally, a bi-curved focus overlaps with paraboloidal focus, and hyperboloid focal axis overlaps with paraboloidal focal axis, and radiation source is positioned in another focus bi-curved.The primary event carried out the electromagnetic wave that radiation source sends by subreflector, by reflection of electromagnetic wave on main reflector, and then obtains the plane wave wave beam of respective direction, to realize directional transmissions after main reflector reflection.

Visible, the main reflector of traditional Cassegrain antenna needs to be processed into the very high parabola of precision, but process the parabola that such precision is high, difficulty is very large, and the height that cost is suitable.

Summary of the invention

Technical problem to be solved by this invention is, for the processing of existing Cassegrain antenna not easily, defect that cost is high, provide a kind of and process Super-material antenna that is simple, low cost of manufacture.

The technical solution adopted for the present invention to solve the technical problems is: provide a kind of Super-material antenna, comprise the Meta Materials main reflector with center through hole, be arranged on the feed in center through hole and be arranged on the Meta Materials subreflector in feed front, the electromagnetic wave of feed radiation is successively through Meta Materials subreflector, with the form outgoing of plane wave after the reflection of Meta Materials main reflector, described Meta Materials main reflector comprises the first core layer and is arranged on the first reflector of the first core layer rear surface, described first core layer comprises at least one first core layer, described first core layer comprises the first base material and is arranged on the planar arrangement of multiple first man-made microstructure on the first base material, described Meta Materials subreflector comprises the second core layer and is arranged on the second reflector of the second core layer rear surface, described second core layer comprises at least one second core layer, described second core layer comprises the second base material and is arranged on the planar arrangement of multiple second man-made microstructure on the second base material, described Meta Materials subreflector has the reflection of electromagnetic wave characteristic similar with revolution ellipsoid, described Meta Materials subreflector has perifocus and over focus, described over focus overlaps with the phase center of described feed, described perifocus overlaps with the focus of Meta Materials main reflector.

Further, the central shaft of described Meta Materials subreflector overlaps with the central shaft of Meta Materials main reflector.

Further, described feed is corrugated horn, and the central shaft of described Meta Materials subreflector passes through the center in the bore face of corrugated horn.

Further, the refraction index profile of arbitrary first core layer meets following formula:

n (R) = n_{\max 1} - \frac{\sqrt{s^{2} + R^{2}} - (s + kλ)}{{2 d}_{1}};

d_{1} = \frac{λ}{2 (n_{\max 1} - n_{\min 1})};

k = floor (\frac{\sqrt{s^{2} + R^{2}} - s}{λ});

Wherein, n (R) represents that in this first core layer, radius is the refractive index value at R place, and the refraction index profile center of circle of this first core layer is the central shaft of Meta Materials subreflector and the intersection point of this first core layer;

S is the distance of perifocus to the front surface of Meta Materials main reflector of described Meta Materials subreflector;

D ₁be the thickness of the first core layer;

N _max1represent the refractive index maximum in the first core layer;

N _min1represent the refractive index minimum value in the first core layer;

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

Floor represents downward round numbers.

Further, the refraction index profile of arbitrary second core layer meets following formula:

n (r) = n_{\max 2} - \frac{\sqrt{r^{2} + a^{2}} + \sqrt{r^{2} + b^{2}} - (a + b + kλ)}{{2 d}_{2}};

d_{2} = \frac{λ}{2 (n_{\max 2} - n_{\min 2})};

k = floor (\frac{\sqrt{r^{2} + a^{2}} + \sqrt{r^{2} + b^{2}} - (a + b)}{λ});

Wherein, n (r) represents that in this second core layer, radius is the refractive index value at r place, and the refraction index profile center of circle of this second core layer is the central shaft of Meta Materials subreflector and the intersection point of this second core layer;

D ₂be the thickness of the second core layer;

N _max2represent the refractive index maximum in the second core layer;

N _min2represent the refractive index minimum value in the second core layer;

A represents the vertical range of the over focus of Meta Materials subreflector to Meta Materials subreflector; Namely feed phase center is to the vertical range of Meta Materials subreflector FF;

B represents the vertical range of the perifocus of Meta Materials subreflector to Meta Materials subreflector;

Floor represents downward round numbers.

Further, described first base material comprises the first prebasal plate and first metacoxal plate of sheet, described multiple first man-made microstructure is folded between the first prebasal plate and the first metacoxal plate, the thickness of described first core layer 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 multiple first man-made microstructure is 0.01-0.5mm.

Further, described second base material comprises the second prebasal plate and second metacoxal plate of sheet, described multiple second man-made microstructure is folded between the second prebasal plate and the second metacoxal plate, the thickness of described second core layer is 0.21-2.5mm, 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 multiple second man-made microstructure is 0.01-0.5mm.

Further, described first man-made microstructure and the second man-made microstructure are metal micro structure, described metal micro structure is made up of one or more metal wire, described metal wire is copper cash, silver-colored line or aluminum steel, described multiple first man-made microstructure and multiple second man-made microstructure by etching, plating, bore quarters, photoetching, electronics carve or the method at ion quarter is respectively formed on the first base material and the second base material.

Further, multiple first man-made microstructure on described first base material and multiple second man-made microstructure on the second base material obtain by the differentiation of the topological pattern in the alabastrine metal micro structure of plane, described have the first metal wire and the second metal wire mutually vertically divided equally in the alabastrine metal micro structure of plane, described first metal wire is identical with the length of the second metal wire, described first metal wire two ends are connected with two the first metal branch of equal length, described first metal wire two ends are connected on the mid point of two the first metal branch, described second metal wire two ends are connected with two the second metal branch of equal length, described second metal wire two ends are connected on the mid point of two the second metal branch, described first metal branch is equal with the length of the second metal branch.

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

According to Super-material antenna of the present invention, the main reflector of traditional parabola form is instead of by the Meta Materials main reflector of tabular, be instead of the subreflector of traditional rotary double-face form by the Meta Materials subreflector of tabular, therefore manufacture processing and be more prone to, cost is cheaper.This Super-material antenna, according to the difference of institute's selected frequency, can be applicable to the fields such as satellite antenna, microwave antenna and radar antenna.

Accompanying drawing explanation

Fig. 1 is the structural representation of Super-material antenna of the present invention;

Fig. 2 is the perspective diagram of the metamaterial unit of a kind of form first of the present invention core layer;

Fig. 3 is the refraction index profile schematic diagram of the first core layer of a kind of form of the present invention;

Fig. 4 is the structural representation of the first core layer of a kind of form of the present invention;

Fig. 5 is the schematic diagram of the topological pattern 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 the first stage of the differentiation of the topological pattern of the alabastrine metal micro structure of plane;

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

Figure 10 is the structural representation of the second core layer of a kind of form of the present invention;

Figure 11 is the perspective diagram of the metamaterial unit of a kind of form second of the present invention core layer.

Embodiment

As shown in Figures 1 to 4, according to Super-material antenna of the present invention, comprise the Meta Materials main reflector ZF with center through hole TK, be arranged on the feed 1 in center through hole TK and be arranged on the Meta Materials subreflector FF in feed 1 front, the electromagnetic wave of feed 1 radiation is successively through Meta Materials subreflector FF, with the form outgoing of plane wave after the reflection of Meta Materials main reflector ZF, described Meta Materials main reflector ZF comprises the first core layer 101 and is arranged on the first reflector 201 of the first core layer 101 rear surface, described first core layer 101 comprises at least one first core layer 10, described first core layer 10 comprises the first base material JC1 and is arranged on the multiple first man-made microstructure JG1 on the first base material JC1, described Meta Materials subreflector FF comprises the second core layer 102 and is arranged on the second reflector 202 of the first core layer 102 rear surface, described second core layer 102 comprises at least one second core layer 20, described first core layer 20 comprises the second base material JC2 and is arranged on the multiple second man-made microstructure JG2 on the second base material JC2, described Meta Materials subreflector FF has the reflection of electromagnetic wave characteristic similar with revolution ellipsoid, described Meta Materials subreflector FF has perifocus F1 and over focus F2, the phase center of described feed 1 overlaps with the over focus F2 of Meta Materials subreflector, described perifocus F1 overlaps with the focus of Meta Materials main reflector.The phase center of feed 1 is the equal point of electromagnetic wave phase place in feed, namely feed is equivalent to desirable point source, this position residing for desirable point source, the F2 point namely in figure.Herein, Meta Materials subreflector FF has the reflection of electromagnetic wave characteristic similar with revolution ellipsoid, refer to that the electromagnetic wave sent by over focus F2 is after Meta Materials subreflector FF reflects, the electromagnetic wave of outgoing focuses at perifocus F1 place, and revolution ellipsoid possesses this characteristic just.

In the present invention, the central shaft Z2 of described Meta Materials subreflector overlaps with the central shaft Z1 of Meta Materials main reflector.The central shaft Z2 of Meta Materials subreflector is focal axis, is the perifocus F1 of Meta Materials subreflector and the straight line at over focus F2 line place.Perifocus F1 is near Meta Materials subreflector FF, and over focus F2 overlaps with the phase center of feed 1.

In the present invention, preferably, described feed 1 is corrugated horn, and the central shaft Z2 of described Meta Materials subreflector passes through the center in the bore face of corrugated horn.

In the present invention, first reflector and the second reflector for having the metallic reflection plate on smooth surface, such as, can be able to be the copper coin of polishing, aluminium sheet or iron plate etc., may also be PEC (perfect electric conductor) reflecting surface, can certainly be metal coating, such as copper coating.In the present invention, described first core layer 10 and the second arbitrary longitudinal section of core layer 20 are of similar shape and area, and longitudinal section herein refers to section vertical with the central shaft Z2 of described Meta Materials subreflector in the first core layer 10, second core layer 20.The longitudinal section of described first core layer 10 and the second core layer 20 can be for square, may also be circular or oval, the square of such as 300X300mm or 450X450mm, or diameter is the circle of 250,300 or 450mm.

In the present invention, for the ease of understanding, as Fig. 2, shown in Fig. 4, described first core layer 10 can be divided into multiple metamaterial unit D as shown in Figure 2 of rectangular array arrangement, each metamaterial unit D comprises prebasal plate unit U, metacoxal plate unit V and be arranged on prebasal plate unit U, the first man-made microstructure JG1 between metacoxal plate unit V, the length of usual metamaterial unit D, wide and thickness is all not more than 1/5th of electromagnetic wavelength corresponding to center of antenna frequency, be preferably 1/10th, therefore, the size of metamaterial unit D can be determined according to the centre frequency of antenna.Fig. 2 is the technique of painting of perspective, and to represent the position of man-made microstructure JG1 in metamaterial unit D, as shown in Figure 2, described first man-made microstructure 2 is sandwiched between base board unit U, metacoxal plate unit V, and its surface, place represents with SR.

Equally, as shown in Figures 10 and 11, also the second core layer 20 can be divided into multiple metamaterial unit D as shown in figure 11 of rectangular array arrangement.

In the present invention, the refraction index profile of arbitrary first core layer 10 meets following formula:

n (R) = n_{\max 1} - \frac{\sqrt{s^{2} + R^{2}} - (s + kλ)}{{2 d}_{1}} - - - (1);

d_{1} = \frac{λ}{2 (n_{\max 1} - n_{\min 1})} - - - (2);

k = floor (\frac{\sqrt{s^{2} + R^{2}} - s}{λ}) - - - (3);

D ₁be the thickness of the first core layer;

N _max1represent the refractive index maximum in the first core layer;

N _min1represent the refractive index minimum value in the first core layer;

Floor represents downward round numbers;

Such as, when (R is in a certain number range) is more than or equal to 0 when being less than 1, and k gets 0, when (R is in a certain number range) is more than or equal to 1 when being less than 2, and k gets 1, and the rest may be inferred.

By formula (1) to determined first core layer of formula (3), remain unchanged along its normal direction refractive index, perpendicular to its refraction index profile in the plane of normal as shown in Figure 3, it comprises multiple homocentric annular region, its center of circle is the O point in figure, preferably, the center of circle is the center of this plane, annular region H1 is schematically depicted to annular region H6 in Fig. 3, in each annular region, the refractive index at same radius place is equal, and along with radius increase refraction reduce gradually, and have adjacent two annular regions to be hopping pattern in the position refractive index that it connects, namely in adjacent two annular regions, its the outermost refractive index of annular region being positioned at inner side is n _min, the refractive index being positioned at its inner side of annular region in outside is n _max, such as, in Fig. 3, the outermost refractive index of annular region H1 is n _min, the refractive index of annular region H2 inner side is n _max.It should be noted that annular region is not necessarily complete, also can be incomplete, such as, annular region H5 in Fig. 3 and H6, and only have when the longitudinal section of the first core layer is for time circular, its multiple annular regions obtained then are complete annular region.

In the present invention, above-mentioned radius refers to the distance of the center of circle O in Fig. 3 to the centre of surface of each metamaterial unit, it above-mentioned radius stricti jurise is not a continuous print excursion, but because each metamaterial unit is far smaller than electromagnetic wavelength corresponding to center of antenna frequency, thus can be similar to think that above-mentioned radius is continually varying.

By formula (1) to determined first core layer of formula (3), there is refraction index profile rule as shown in Figure 3, according to center of antenna frequency, the number of plies (i.e. the thickness of the first core layer) of appropriate design first core layer, namely can make the electromagnetic wave sent by the perifocus F1 of described Meta Materials subreflector can with the form outgoing of the plane wave perpendicular to the first core layer after Meta Materials main reflector, namely the focus of Meta Materials main reflector overlaps with the perifocus F1 of described Meta Materials subreflector.

In the present invention, the refraction index profile of arbitrary second core layer meets following formula:

n (r) = n_{\max 2} - \frac{\sqrt{r^{2} + a^{2}} + \sqrt{r^{2} + b^{2}} - (a + b + kλ)}{{2 d}_{2}} - - - (4);

d_{2} = \frac{λ}{2 (n_{\max 2} - n_{\min 2})} - - - (5);

k = floor (\frac{\sqrt{r^{2} + a^{2}} + \sqrt{r^{2} + b^{2}} - (a + b)}{λ}) - - - (6);

D ₂be the thickness of the second core layer;

N _max2represent the refractive index maximum in the second core layer;

N _min2represent the refractive index minimum value in the second core layer;

Floor represents downward round numbers.

By formula (4) to determined second core layer of formula (6), according to center of antenna frequency, the number of plies (i.e. the thickness of the second core layer) of appropriate design second core layer, Meta Materials subreflector can be made to have the reflection of electromagnetic wave characteristic similar with revolution ellipsoid, namely can make the electromagnetic wave sent by over focus F2 (feed phase center) after Meta Materials subreflector FF reflects, the electromagnetic wave of outgoing focuses at perifocus F1 place.

To sum up, the focus that nearly focal point F 1 is set to Meta Materials main reflector just can make the electromagnetic wave that sent by feed after the primary event of Meta Materials subreflector, Meta Materials main reflector secondary reflection with the form outgoing of plane wave; Vice versa, i.e. the plane electromagnetic wave of vertical Meta Materials main reflector incidence can focus at the phase center place (being also over focus F2 place) at feed after the main emitter primary event of Meta Materials, Meta Materials subreflector secondary reflection.

In the present invention, preferably, the shape of described Meta Materials subreflector and size adapt to shape and the size of main reflector, namely as shown in Figure 1, make the edge just being arrived Meta Materials main reflector by the electromagnetic wave of Meta Materials subreflector edge outgoing.

In the present invention, as shown in Figures 3 and 4, described first base material JC1 comprises the first prebasal plate 13 and the first metacoxal plate 15 of sheet, described multiple first man-made microstructure JG1 is folded between the first prebasal plate 13 and the first metacoxal plate 15, the thickness of described first core layer is 0.21-2.5mm, and wherein, the thickness of the first prebasal plate is 0.1-1mm, the thickness of the first metacoxal plate is 0.1-1mm, and the thickness of multiple first man-made microstructure is 0.01-0.5mm.

As an example, the thickness of described first core layer is 0.818mm, and wherein, the thickness of the first prebasal plate and the first metacoxal plate is 0.4mm, and the thickness of multiple first man-made microstructure is 0.018mm.

In the present invention, as shown in Figures 10 and 11, described second base material JC2 comprises the second prebasal plate 14 and the second metacoxal plate 16 of sheet, described multiple second man-made microstructure JG2 is folded between the first prebasal plate 14 and the first metacoxal plate 16, the thickness of described second core layer is 0.21-2.5mm, and 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 multiple second man-made microstructure is 0.01-0.5mm.

As an example, the thickness of described second core layer is 0.818mm, and wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.4mm, and the thickness of multiple second man-made microstructure is 0.018mm.

The thickness of described first core layer, the second core layer determines, then can set the different numbers of plies as required, thus formation has thickness d ₁the first core layer and there is thickness d ₂the second core layer.

In the present invention, described first base material and the second base material are obtained by ceramic material, polystyrene, polypropylene, polyimides, polyethylene, polyether-ether-ketone or polytetrafluoroethylene.Such as, polyfluortetraethylene plate (PS plate), it has good electrical insulating property, can not produce interference, and have excellent chemical stability, corrosion resistance, long service life to electromagnetic electric field.

In the present invention, preferably, described first man-made microstructure and the second man-made microstructure are metal micro structure, described metal micro structure is made up of one or more metal wire, described metal wire is copper cash, silver-colored line or aluminum steel, multiple first man-made microstructure on described first base material by etching, plating, bore quarters, photoetching, electronics carve or ion quarter method obtain.The first core layer 10 such as shown in Fig. 4, can first by one of them in the first prebasal plate 13 or the first metacoxal plate 15 covers copper, unwanted copper is removed again by techniques such as etchings, namely obtain the planar arrangement of multiple first man-made microstructure JG1, namely finally the first prebasal plate 13 and the first metacoxal plate 15 to be bonded together with PUR defines the first core layer 10.Multiple first core layer 10 can be formed, by each first core layer 10 bonding first core layer 101 that can obtain sandwich construction of PUR by said method.The material of PUR is preferably consistent with the material of the first core layer.

The second core layer and the second core layer can be obtained equally with said method.

In the present invention, preferably, the differentiation of multiple first man-made microstructure on described first base material and the second man-made microstructure on the second base material topological pattern in the alabastrine metal micro structure of plane all as shown in Figure 5 obtains.The topological pattern of the metal micro structure namely shown in Fig. 5 is the basic flat topology pattern in the alabastrine metal micro structure of plane, and the topological pattern of all metal micro structures on same first base material and the second base material develops by the pattern shown in Fig. 5 and obtains.

As shown in Figure 5, described have the first metal wire J1 and the second metal wire J2 that mutually vertically divide equally in the alabastrine metal micro structure of plane, described first metal wire J1 is identical with the length of the second metal wire J2, described first metal wire J1 two ends are connected with two the first metal branch F1 of equal length, described first metal wire J1 two ends are connected on the mid point of two the first metal branch F1, described second metal wire J2 two ends are connected with two the second metal branch F2 of equal length, described second metal wire J2 two ends are connected on the mid point of two the second metal branch F2, described first metal branch F1 is equal with the length of the second metal branch F2.

Fig. 6 is a kind of derived structure of the alabastrine metal micro structure of plane shown in Fig. 5.It is all connected with identical 3rd metal branch F3 at the two ends of each first metal branch F1 and each second metal branch F2, and the mid point of corresponding 3rd metal branch F3 is connected with the end points of the first metal branch F1 and the second metal branch F2 respectively.The rest may be inferred, and the present invention can also derive the metal micro structure of other form.Equally, the just basic flat topology pattern shown in Fig. 6.

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, first metal wire J1 and the second metal wire J2 is not straight line, but folding line, first metal wire J1 and the second metal wire J2 is provided with two kink WZ, but the first metal wire J1 remains vertical with the second metal wire J2 to be divided equally, by arrange kink towards with the relative position of kink on the first metal wire and the second metal wire, metal micro structure shown in Fig. 7 is all overlapped with former figure to the figure of any direction 90-degree rotation around the axis perpendicular to the first metal wire and the second metal wire intersection point.In addition, other can also be had to be out of shape, such as, the first metal wire J1 and the second metal wire J2 all arranges multiple kink WZ.Equally, the just basic flat topology pattern shown in Fig. 7.

Known refractive index wherein μ is relative permeability, and ε is relative dielectric constant, and μ and ε is collectively referred to as electromagnetic parameter.Experiment proves, when electromagnetic wave is by refractive index dielectric material heterogeneous, and can to the large direction deviation of refractive index.When relative permeability is certain (usually close to 1), refractive index is only relevant with dielectric constant, when the first base material is selected, utilize the arbitrary value (within the specific limits) that only can realize metamaterial unit refractive index to the first man-made microstructure of electric field response, under this center of antenna frequency, utilize simulation software, as CST, MATLAB, COMSOL etc., the situation that the dielectric constant being obtained first man-made microstructure (the alabastrine metal micro structure of plane as shown in Figure 5) of a certain given shape by emulation is changed along with the refractive index variable of topological pattern, data one to one can be listed, the first core layer of the specific refractive index distribution that we need can be designed.Equally, the second core layer of the specific refractive index distribution that we need can be designed.

In the present embodiment, the planar arrangement of the first man-made microstructure in the first core layer obtains by Computer Simulation (such as CST emulation), specific as follows:

(1) attachment first base material of the first man-made microstructure is determined.Such as dielectric constant is the medium substrate of 2.7, and the material of this medium substrate can be FR-4, F4b or PS.

(2) size of metamaterial unit is determined.The size of metamaterial unit is obtained by the centre frequency of antenna, frequency is utilized to obtain its wavelength, get again be less than wavelength 1/5th a numerical value as the length CD of metamaterial unit D and width KD, then get be less than wavelength 1/10th a numerical value as metamaterial unit D thickness.Such as correspond to the center of antenna frequency of 11.95G, described metamaterial unit D is long CD as shown in Figure 2 and wide KD is 2.8mm, thickness HD is 0.543mm square platelet.

(3) material of the first man-made microstructure and basic flat topology pattern thereof is determined.In the present invention, the first man-made microstructure is metal micro structure, and the material of described metal micro structure is copper, and the basic flat topology pattern 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; Basic flat topology pattern herein, refers to the differentiation basis of the topological pattern of all first man-made microstructure on same first base material.

(4) the topological pattern parameter of the first man-made microstructure is determined.As shown in Figure 5, in the present invention, the topological pattern parameter of the alabastrine metal micro structure of plane comprises the live width W of metal micro structure, the length a of the first metal wire J1, the length b of the first metal branch F1, and the thickness HD of metal micro structure, in the present invention, thickness is constant, is taken as 0.018mm.

(5) the differentiation restrictive condition of the topological pattern of metal micro structure is determined.In the present invention, the differentiation restrictive condition of the topological pattern of metal micro structure has, the minimum spacing WL (namely as shown in Figure 5, the long limit of metal micro structure and metamaterial unit or the distance of broadside are WL/2) between metal micro structure, the live width W of metal micro structure, the size of metamaterial unit; Due to processing technology restriction, WL is more than or equal to 0.1mm, and equally, live width W is greater than to equal 0.1mm.First time is when emulating, WL can get 0.1mm, W can get 0.3mm, it is 2.8mm that metamaterial unit is of a size of long and wide, thickness is that (thickness of metal micro structure is 0.018mm to 0.818mm, the thickness of the first base material is 0.8mm), now the topological pattern parameter of metal micro structure only has a and b Two Variables.The topological pattern of metal micro structure, by the differentiation mode as shown in Fig. 8 to Fig. 9, corresponding to a certain characteristic frequency (such as 11.95GHZ), can obtain a continuous print variations in refractive index scope.

Particularly, the differentiation of the topological pattern of described metal micro structure comprises two stages (basic pattern that topological pattern develops is the metal micro structure shown in Fig. 5):

First stage: according to differentiation restrictive condition, when b value remains unchanged, a value is changed to maximum from minimum value, the metal micro structure in this evolution process is " ten " font when minimum value (a get except).In the present embodiment, the minimum value of a is 0.3mm (live width W), and the maximum of a is (CD-WL).Therefore, in the first phase, the differentiation of the topological pattern of metal micro structure as shown in Figure 8, is namely the square JX1 of W from the length of side, develops into maximum " ten " font topology pattern JD1 gradually.In the first phase, along with the differentiation of the topological pattern of metal micro structure, the refractive index of the metamaterial unit corresponding with it increases (respective antenna one characteristic frequency) continuously.

Second stage: according to differentiation restrictive condition, when a is increased to maximum, a remains unchanged; Now, b is increased continuously maximum from minimum value, the metal micro structure in this evolution process is plane flakes.In the present embodiment, the minimum value of b is 0.3mm, and the maximum of b is (CD-WL-2W).Therefore, in second stage, the differentiation of the topological pattern of metal micro structure as shown in Figure 9, namely from maximum " ten " font topology pattern JD1, develop into the alabastrine topological pattern JD2 of maximum plane gradually, the alabastrine topological pattern JD2 of maximum plane herein refers to, the length b of the first metal branch J1 and the second metal branch J2 can not extend again, otherwise the first metal branch is crossing by generation with the second metal branch.In second stage, along with the differentiation of the topological pattern of metal micro structure, the refractive index of the metamaterial unit corresponding with it increases (respective antenna one characteristic frequency) continuously.

If the variations in refractive index scope being obtained metamaterial unit by above-mentioned differentiation contains n _minto n _maxconsecutive variations scope, then meet design needs.If the variations in refractive index scope that above-mentioned differentiation obtains metamaterial unit does not meet design needs, such as maximum is too little or minimum value is excessive, then change WL and W, again emulate, until obtain the variations in refractive index scope of our needs.

According to formula (1) to (3), a series of metamaterial unit emulation obtained, according to after the refractive index arrangement of its correspondence (being in fact exactly the arrangement of multiple first man-made microstructure on the first base material of different topology pattern), can obtain the first core layer of the present invention.

In like manner, according to formula (4) to (8), a series of metamaterial unit emulation obtained, according to after the refractive index arrangement of its correspondence (being in fact exactly the arrangement of multiple second man-made microstructure on the second base material of different topology pattern), can obtain the second core layer of the present invention.

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

Claims

1. a Super-material antenna, it is characterized in that, comprise the Meta Materials main reflector with center through hole, be arranged on the feed in center through hole and be arranged on the Meta Materials subreflector in feed front, the central shaft of described Meta Materials subreflector overlaps with the central shaft of Meta Materials main reflector, the electromagnetic wave of feed radiation is successively through Meta Materials subreflector, with the form outgoing of plane wave after the reflection of Meta Materials main reflector, described Meta Materials main reflector comprises the first core layer and is arranged on the first reflector of the first core layer rear surface, described first core layer comprises at least one first core layer, described first core layer comprises the first base material and is arranged on the planar arrangement of multiple first man-made microstructure on the first base material, described Meta Materials subreflector comprises the second core layer and is arranged on the second reflector of the second core layer rear surface, described second core layer comprises at least one second core layer, described second core layer comprises the second base material and is arranged on the planar arrangement of multiple second man-made microstructure on the second base material, described Meta Materials subreflector has the reflection of electromagnetic wave characteristic similar with revolution ellipsoid, described Meta Materials subreflector has perifocus and over focus, described over focus overlaps with the phase center of described feed, described perifocus overlaps with the focus of Meta Materials main reflector,

The refraction index profile of arbitrary first core layer meets following formula:

n (R) = n_{\max 1} - \frac{\sqrt{s^{2} + R^{2}} - (s + kλ)}{2 d_{1}};

d_{1} = \frac{λ}{2 (n_{\max 1} - n_{\min 1})};

k = floor (\frac{\sqrt{s^{2} + R^{2}} - s}{λ});

D ₁be the thickness of the first core layer;

N _max1represent the refractive index maximum in the first core layer;

N _min1represent the refractive index minimum value in the first core layer;

Floor represents downward round numbers.

2. Super-material antenna according to claim 1, is characterized in that, described feed is corrugated horn, and the central shaft of described Meta Materials subreflector passes through the center in the bore face of corrugated horn.

3. Super-material antenna according to claim 1, is characterized in that, the refraction index profile of arbitrary second core layer meets following formula:

n (r) = n_{\max 2} - \frac{\sqrt{r^{2} + a^{2}} + \sqrt{r^{2} + b^{2}} - (a + b + kλ)}{2 d_{2}};

d_{2} = \frac{λ}{2 (n_{\max 2} - n_{\min 2})};

k = floor (\frac{\sqrt{r^{2} + a^{2}} + \sqrt{r^{2} + b^{2}} - (a + b)}{λ});

D ₂be the thickness of the second core layer;

N _max2represent the refractive index maximum in the second core layer;

N _min2represent the refractive index minimum value in the second core layer;

Floor represents downward round numbers.

4. Super-material antenna according to claim 1, it is characterized in that, described first base material comprises the first prebasal plate and first metacoxal plate of sheet, described multiple first man-made microstructure is folded between the first prebasal plate and the first metacoxal plate, the thickness of described first core layer is 0.21-2.5mm, and wherein, the thickness of the first prebasal plate is 0.1-1mm, the thickness of the first metacoxal plate is 0.1-1mm, and the thickness of multiple first man-made microstructure is 0.01-0.5mm.

5. Super-material antenna according to claim 1, it is characterized in that, described second base material comprises the second prebasal plate and second metacoxal plate of sheet, described multiple second man-made microstructure is folded between the second prebasal plate and the second metacoxal plate, the thickness of described second core layer is 0.21-2.5mm, and 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 multiple second man-made microstructure is 0.01-0.5mm.

6. Super-material antenna according to claim 1, it is characterized in that, described first man-made microstructure and the second man-made microstructure are metal micro structure, described metal micro structure is made up of one or more metal wire, described metal wire is copper cash, silver-colored line or aluminum steel, described multiple first man-made microstructure and multiple second man-made microstructure by etching, plating, bore quarters, photoetching, electronics carve or the method at ion quarter is respectively formed on the first base material and the second base material.

7. Super-material antenna according to claim 6, it is characterized in that, multiple first man-made microstructure on described first base material and multiple second man-made microstructure on the second base material obtain by the differentiation of the topological pattern in the alabastrine metal micro structure of plane, described have the first metal wire and the second metal wire mutually vertically divided equally in the alabastrine metal micro structure of plane, described first metal wire is identical with the length of the second metal wire, described first metal wire two ends are connected with two the first metal branch of equal length, described first metal wire two ends are connected on the mid point of two the first metal branch, described second metal wire two ends are connected with two the second metal branch of equal length, described second metal wire two ends are connected on the mid point of two the second metal branch, described first metal branch is equal with the length of the second metal branch.

8. Super-material antenna according to claim 7, it is characterized in that, described is that each first metal branch of the alabastrine metal micro structure of plane and the two ends of each second metal branch are also connected with identical 3rd metal branch, and the mid point of corresponding 3rd metal branch is connected with the end points of the first metal branch and the second metal branch respectively.