CN102810749B - Base station antenna - Google Patents
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- CN102810749B CN102810749B CN201110167302.4A CN201110167302A CN102810749B CN 102810749 B CN102810749 B CN 102810749B CN 201110167302 A CN201110167302 A CN 201110167302A CN 102810749 B CN102810749 B CN 102810749B
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Abstract
The invention discloses a base station antenna. The base station antenna comprises at least one radiation oscillator and a metamaterial panel, wherein the radiation oscillator is used for generating electromagnetic radiation wave; the metamaterial panel is used for converging the electromagnetic radiation wave generated by the radiation oscillators and radiating the electromagnetic radiation wave outwards; the metamaterial panel comprises a substrate and a plurality of pores which are periodically distributed in the substrate; and due to the distribution of the pores, the refractive index of the metamaterial panel is reduced along with the increase of the radius of the metamaterial panel, and the change rate of the refractive index is also increased gradually. By a punching process adopted in the antenna, the metamaterial panel can converge electromagnetic wave, so that the width of radiation wave lobe of the base station antenna is reduced; the gain of the base station antenna is obviously improved; and the process is simple, the cost is low, and the whole base station antenna is minitype.
Description
Technical field
The present invention relates to a kind of antenna, particularly relate to a kind of antenna for base station.
Background technology
Antenna for base station is the important component part of wireless access in mobile communication system, and its development is subject to the restriction of many factors, particularly along with mobile communications network is constantly to breadth and depth expansion, causes station layout more and more intensive.This also has higher requirement to the design parameter of antenna for base station, as the relevant parameter such as gain, volume, front and back ratio, cross polarization discrimination, weight of antenna for base station.
Antenna for base station of the prior art comprises the radiating doublet that transmits, Received signal strength radiating doublet and reflector.Above-mentioned radiating doublet, along reflector longitudinal arrangement, the four edges of the base plate of reflector vertically extends to form four sidewalls respectively, thus makes reflector become the cavity of a side opening.The electromagnetic radiation that the radiating doublet that transmits produces can be carried out better reflection with the front and back ratio and the cross polarization discrimination that improve antenna for base station by the reflector of such setting.But the lobe of above-mentioned base station antenna radiation ripple is relatively wide, this bs antenna gain is made to be difficult to meet the requirement of system design of Modern Communication System high-gain.
Meta Materials refers to some artificial composite structures with the extraordinary physical property not available for natural material or composite material.By the structurally ordered design on the key physical yardstick of material, the restriction of some apparent natural law can be broken through, thus acquisition exceeds the intrinsic common meta-materials function of nature.
The Meta Materials of current routine is mainly reached changed the dielectric constant of Meta Materials each point and the object of magnetic permeability by periodic arrangement is different on substrate artificial metal's micro-structural.But want to change the dielectric constant of Meta Materials each point and magnetic permeability to realize different functions, it is not only way that metamaterial substrate arranges artificial metal's micro-structural, and in metamaterial substrate, arrange artificial metal's micro-structural complex process, realization difficulty.
Summary of the invention
Technical problem to be solved by this invention is, for the above-mentioned deficiency of prior art, proposes simple, the with low cost and antenna for base station of miniaturization of a kind of width, structure reducing base station antenna radiation wave-wave lobe.
The technical scheme that the present invention solves the employing of its technical problem is that propose a kind of antenna for base station, it comprises: at least one radiating doublet, for generation of electromagnetic radiation as waves; Metamaterial panel, after the electromagnetic radiation as waves for described at least one radiating doublet being produced converges and to external radiation; Described metamaterial panel comprises substrate and multiple apertures of cycle arrangement on substrate.
Further, described antenna for base station also comprises reflector element, and described reflector element is converged backward external radiation to described metamaterial panel by described metamaterial panel in order to the part reflection of electromagnetic wave that described at least one radiating doublet produced.
Further, described metamaterial panel is formed by stacking by multiple metamaterial sheet with identical refraction index profile, described metamaterial sheet is made up of multiple metamaterial unit, one or more apertures that described metamaterial unit comprises unit base material and formed on described unit base material, namely all unit base materials constitute the substrate of metamaterial panel.
Further, described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, described border circular areas place refractive index is maximum, and the annular region place refractive index with same radius is identical; Radius is larger, and the refractive index at the annular region place that this radius is corresponding is less, and along with the increase of radius, the variable quantity of refractive index increases gradually.
Further, each metamaterial unit described is formed with an aperture, the medium that refractive index is less than base material refractive index is filled with in described aperture, the arrangement rule that described metamaterial unit forms described metamaterial sheet is: described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, the small pore volume that the metamaterial unit at described border circular areas place is formed is minimum, there is the small pore volume that the metamaterial unit at the annular region place of same radius is formed identical, along with the increase of radius, the small pore volume that the metamaterial unit at the annular region place of respective radius is formed also increases and the changing value of the small pore volume that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the small pore volume formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
Further, the medium of filling in described aperture is air.
Further, each metamaterial unit described is formed with an aperture, the medium that refractive index is greater than unit base material refractive index is filled with in described aperture, the arrangement rule that described metamaterial unit forms described metamaterial sheet is: described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, the small pore volume that the metamaterial unit at described border circular areas place is formed is maximum, there is the small pore volume that the metamaterial unit at the annular region place of same radius is formed identical, along with the increase of radius, small pore volume that the metamaterial unit at the annular region place of respective radius is formed reduces and the changing value of the small pore volume that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the small pore volume formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
Further, described metamaterial unit is formed with quantity difference, the aperture that volume is identical, the medium that refractive index is less than unit base material refractive index is filled with in described aperture, the arrangement rule that described metamaterial unit forms described metamaterial sheet is: described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, the aperture minimum number that the metamaterial unit at described border circular areas place is formed, the quantity with the aperture that the metamaterial unit at the annular region place of same radius is formed is identical, along with the increase of radius, the quantity of the aperture that the metamaterial unit at the annular region place of respective radius is formed also increases and the changing value of the quantity of the aperture that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the quantity of the aperture formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
Further, described metamaterial unit is formed with quantity difference, the aperture that volume is identical, the medium that refractive index is greater than unit base material refractive index is filled with in described aperture, the arrangement rule that described metamaterial unit forms described metamaterial sheet is: described metamaterial sheet comprises one with the described metamaterial sheet central point border circular areas that is the center of circle and the concentric annular region of multiple and described border circular areas, the quantity of the aperture that the metamaterial unit at described border circular areas place is formed is maximum, the quantity with the aperture that the metamaterial unit at the annular region place of same radius is formed is identical, along with the increase of radius, the quantity of the aperture that the metamaterial unit at the annular region place of respective radius is formed reduces and the changing value of the quantity of the aperture that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the quantity of the aperture formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
Further, each metamaterial unit described is formed with the aperture that volume is identical, the medium that refractive index is different is filled with in described aperture, the refraction index profile rule of the medium of filling in described aperture is: described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, the refractive index of the medium of filling in the aperture that the metamaterial unit at described border circular areas place is formed is maximum, there is the interior medium refraction index of filling of the aperture that the metamaterial unit at the annular region place of same radius is formed identical, along with the increase of radius, the refractive index of the medium of filling in the aperture that the metamaterial unit at the annular region place of respective radius is formed reduces and the changing value of the refractive index of the medium of filling in the aperture that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the refractive index of the medium of filling in the aperture that formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
Antenna for base station of the present invention sets up metamaterial panel on radiating doublet, and metamaterial panel is arranged in substrate by the aperture cycle and forms, the electromagnetic wave that the radiating doublet of antenna for base station produces converges backward external radiation through metamaterial panel, reduce the width of base station antenna radiation wave-wave lobe, the gain of antenna for base station is significantly improved.Meanwhile, the structure of metamaterial panel is formed simple, with low cost and antenna for base station volume is reduced.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of a kind of antenna for base station of the present invention;
Fig. 2 is the forward floor map after the removal of antenna for base station shown in Fig. 1 metamaterial panel;
Fig. 3 is the metamaterial panel structural representation of a kind of antenna for base station of the present invention;
Fig. 4 is the perspective view of the metamaterial unit of metamaterial panel shown in pie graph 3;
Fig. 5 is metamaterial panel refraction index profile schematic diagram;
Fig. 6 is the A-A view of the refraction index profile of metamaterial panel shown in Fig. 5 schematic diagram;
Fig. 7 is the metamaterial panel first better embodiment front view of a kind of antenna for base station of the present invention;
Fig. 8 is the metamaterial panel second better embodiment front view of a kind of antenna for base station of the present invention;
Fig. 9 is metamaterial panel the 3rd better embodiment front view of a kind of antenna for base station of the present invention.
Embodiment
Below in conjunction with relevant drawings and specific embodiment, the present invention will be further described.
Fig. 1 is the cross section structure schematic diagram of antenna for base station of the present invention, and antenna for base station 10 comprises the metamaterial panel 103 that reflector element 101, multiple radiating doublet 102 and the electromagnetic wave for being produced by multiple radiating doublet 102 carry out converging.The part electromagnetic wave that multiple radiating doublet 102 produces converges via described metamaterial panel 103 and to external radiation, and the electromagnetic wave of the remainder that multiple radiating doublet 102 produces reflexes in described metamaterial panel 103 through reflector element 101, this part is converged backward external radiation by the radiated wave reflected by metamaterial panel 103.
Fig. 2 is the forward floor map after the removal of antenna for base station shown in Fig. 1 metamaterial panel 103.Reflector element 101 comprises base plate 121, and radiating doublet 102 is fixed on base plate 121 by feed support (not going out in figure), and wherein radiating doublet is that matrix arrangement is on reflector element 101.In the present invention, reflector element 101 adopts metal material to make.
Preferably, antenna for base station 10 also comprises the multiple passive power splitter part 105 be arranged on reflector element 101, and described passive power splitter part 105 is electrically connected respectively with described multiple radiating doublet 102 and the signal of telecommunication produced by Multiinputoutput (MIMO) interface 106 receiving baseband signal processor.Multiple-input and multiple-output herein refers to that all single antenna in mimo antenna is launched simultaneously, receives simultaneously.
In the present invention, the function of metamaterial panel 103 is to external radiation, electromagnetic wave lobe width is reduced with the gain increasing antenna for base station entirety after the electromagnetic wave convergence that radiating doublet 102 is produced.Therefore, metamaterial panel 103 need meet certain Structural Design Requirement.
As shown in Figure 3, metamaterial panel 103 comprises at least one metamaterial sheet 4, and whole metamaterial panel 103 can be regarded as and form by multiple metamaterial sheet 4 is stacking.Each metamaterial sheet 4 comprises the substrate 1 of sheet and multiple apertures 2 of periodic array on substrate 1, and aperture 2 and the unit base material part shared by the substrate accompanying by it 1 are a metamaterial unit, and the perspective view of metamaterial unit as shown in Figure 4.Because metamaterial panel 103 need produce continuous response to electromagnetic wave, therefore metamaterial unit size should be less than 1/5th of required response electromagnetic wavelength, is preferably 1/10th of electromagnetic wavelength.In the present invention, the refraction index profile of each metamaterial sheet 4 is all identical, is only described in detail the refraction index profile rule of a metamaterial sheet 4 here.The refraction index profile of each metamaterial sheet 4 is made as shown in Figure 5 by the design of the medium of filling in the volume to aperture 2, aperture 2.Metamaterial sheet 4 comprises one and is greater than the border circular areas annular region concentric with border circular areas with the metamaterial sheet 4 central point border circular areas that is the center of circle and multiple radius, border circular areas place refractive index is maximum, the annular region place refractive index with same radius is identical, radius is larger, the refractive index at the annular region place that this radius is corresponding is less, and along with the increase of radius, the variable quantity of refractive index increases gradually, i.e. n
0> n
1> n
2> ... > n
p, (n
m-n
m-1) > (n
m-1-n
m-2).Only n is provided in Fig. 5
0~ n
5variations in refractive index figure, but should know that variations in refractive index of the present invention is not as limit.Purpose of design of the present invention is: make electromagnetic wave through each metamaterial sheet, and electromagnetic wave deflection angle is changed and final parallel radiation gradually.By formula S in θ=q Δ n, wherein θ is the electromagnetic angle of required deviation, Δ n is front and back variations in refractive index differences, and q is metamaterial sheet thickness and can determines desired parameters value by Computer Simulation and reach purpose of design of the present invention.
Fig. 6 is the A-A view of the refractive index profile of metamaterial sheet 4 shown in Fig. 5.In Fig. 6, whole radiating doublets can regard a feed S as, and as common practise, we are known, electromagnetic refractive index with
proportional, wherein ε is magnetic permeability, μ is dielectric constant, when a branch of electromagnetic wave by a kind of Medium Propagation to another medium time, electromagnetic wave can reflect, when the refraction index profile of material inside is non-homogeneous, electromagnetic wave will to the larger position deviation of refractive index ratio, and the larger then electromagnetic deflection angle of refractive index variable quantity between adjacent cells is larger.Therefore, the refractive index designing metamaterial panel 103 each point make its meet above-mentioned variations in refractive index rule can realize shown in Fig. 6 by after the electromagnetic wave convergence of antenna element radiates to the object that external radiation makes lobe width reduce.
It should be noted that, because in fact metamaterial unit is a cube but not a point, therefore above-mentioned circle, annular just approximate description, the metamaterial unit that actual refractive index is identical or substantially identical circumferentially distributes a zigzag.The programming mode (such as OpenGL) of described point is carried out when its specific design is similar to the smoothed curves such as computer square pixels point-rendering is circular, oval, when pixel is very little relative to curve, curve is shown as smooth, and curve shows sawtooth when pixel is larger relative to curve.
For realizing the change of refractive index shown in Fig. 5 and Fig. 6, can the medium of filling in the volume of aperture 2, aperture 2 be designed.Discuss three kinds of better embodiment in detail below.
As shown in Figure 7, Fig. 7 is the present invention first better embodiment front view.In Fig. 7, metamaterial sheet 4 is made up of multiple metamaterial unit and comprises the aperture 2 of substrate 1 and periodic array arrangement on substrate 1.Each metamaterial unit is formed with an aperture.Substrate 1 can select high molecular polymer, ceramic material, ferroelectric material, ferrite material etc.Wherein preferred FR-4 or the F4B material of high molecular polymer.Corresponding different substrate can adopt different technique to form aperture on substrate, such as when high molecular polymer selected by substrate, form aperture by modes such as drilling machine boring, punch forming or injection mo(u)ldings, then form aperture by modes such as drilling machine boring, punch forming or high temperature sinterings when substrate Ceramics.
Can filled media in aperture 2, in this better embodiment, the medium of filling in aperture 2 is air, and air refraction must be less than substrate 1 refractive index, and when aperture 2 volume is larger, the refractive index of the metamaterial unit occupied by aperture 2 is then less.In this better embodiment, the arrangement rule of metamaterial unit composition metamaterial sheet 4 is: each metamaterial sheet 4 comprises one and is greater than the border circular areas annular region concentric with border circular areas with the metamaterial sheet 4 central point border circular areas that is the center of circle and multiple radius, the volume of the aperture 2 that the metamaterial unit at border circular areas place is formed is minimum, the volume with the aperture 2 that the metamaterial unit at each annular region place of same radius is formed is identical, along with the increase of radius, the volume of the aperture 2 that the metamaterial unit at the annular region place of respective radius is formed also increases and the changing value of the volume of the aperture 2 that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the volume of the aperture 2 formed in the metamaterial unit at the two adjacent annular region places in the center of circle.Ground can be imagined, when being filled with refractive index in aperture 2 and being greater than the same media of substrate 1, then now aperture 2 volume is larger, and the refractive index of the metamaterial unit occupied by aperture 2 is also larger, therefore now the arrangement rule of metamaterial unit by completely contrary with the arrangement rule of filling air in aperture 2.
Fig. 8 is the present invention second better embodiment front view.The difference of itself and the first better embodiment is, in present embodiment, to there is the identical aperture of multiple volume 2 in each metamaterial unit, can simplify the technology difficulty forming aperture 2 on substrate 1 like this.The place identical with the first better embodiment is, in this better embodiment in each metamaterial unit all apertures to account for the regularity of distribution of the volume of metamaterial unit identical with the first better embodiment, namely two kinds of situations are divided into: when the medium refraction index of filling in (1) all apertures is less than substrate index, each metamaterial sheet 4 comprises one and is greater than border circular areas with the metamaterial sheet 4 central point border circular areas that is the center of circle and multiple radius and the annular region concentric with border circular areas and the minimum number of the aperture 2 that the metamaterial unit at border circular areas place is formed, the quantity with the aperture 2 that the metamaterial unit at each annular region place of same radius is formed is identical, along with the increase of radius, the quantity of the aperture 2 that the metamaterial unit at each annular region place of respective radius is formed also increases and the changing value of aperture 2 quantity that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of aperture 2 quantity formed in the metamaterial unit at the two adjacent annular region places in the center of circle.This better embodiment is namely this kind of situation and in all apertures 2, filled media is air, (2) when the medium refraction index of filling in all apertures 2 is greater than substrate index, each metamaterial sheet 4 comprises one and is greater than border circular areas with the metamaterial sheet 4 central point border circular areas that is the center of circle and multiple radius and the annular region concentric with border circular areas and the quantity of the aperture 2 that the metamaterial unit of circle centre position is formed is maximum, the quantity with the aperture 2 that the metamaterial unit at each annular region place of same radius is formed is identical, along with the increase of radius, the quantity of the aperture 2 that the metamaterial unit at each annular region place of respective radius is formed reduces and the changing value of the little hole number that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the little hole number formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
Fig. 9 is the present invention the 3rd better embodiment front view.The difference of itself and the first better embodiment and the second better embodiment is, in 3rd better embodiment, shared by aperture 2, the volume of metamaterial unit is equal, its manifestation mode can be that quantity is different, size is different, shape is not equal, as long as but the volume meeting aperture in each metamaterial unit is equal, for simplifying keyhole formation technique in this preferred embodiment, each orifice size is equal, shape is one just as, quantity.The different various media of refractive index are filled with in aperture 2 to meet the Meta Materials refraction index profile rule wanted required for the present invention in the present embodiment.The refraction index profile rule of the medium of filling in each aperture 2 in the present embodiment is: each metamaterial sheet 4 comprises one and is greater than border circular areas with the metamaterial sheet 4 central point border circular areas that is the center of circle and multiple radius and the annular region concentric with border circular areas and the refractive index of the medium of filling in the aperture 2 that the metamaterial unit at border circular areas place is formed is maximum, there is the interior medium refraction index of filling of aperture 2 that the metamaterial unit at each annular region place of same radius is formed identical, along with the increase of radius, the refractive index of the medium of filling in the aperture 2 that the metamaterial unit at each annular region place of respective radius is formed reduces and the changing value of the refractive index of the medium of filling in the aperture 2 that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the refractive index of the medium of filling in the aperture 2 that formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
Can imagine ground, above-mentioned three execution modes are combined the refraction index profile that also can obtain needed for metamaterial panel of the present invention, and this is no longer going to repeat them.
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 (5)
1. an antenna for base station, is characterized in that: described antenna for base station comprises: at least one radiating doublet, for generation of electromagnetic radiation as waves; Metamaterial panel, after the electromagnetic radiation as waves for described at least one radiating doublet being produced converges and to external radiation; Described metamaterial panel comprises substrate and multiple apertures of cycle arrangement on substrate;
Wherein, described metamaterial panel is formed by stacking by multiple metamaterial sheet with identical refraction index profile, described metamaterial sheet is made up of multiple metamaterial unit, the aperture that described metamaterial unit comprises unit base material and formed on described unit base material, namely whole unit base materials constitutes the substrate of metamaterial panel;
Described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, described border circular areas place refractive index is maximum, and the annular region place refractive index with same radius is identical; Radius is larger, and the refractive index at the annular region place that this radius is corresponding is less, and along with the increase of radius, the variable quantity of refractive index increases gradually;
Wherein, described metamaterial unit is formed with an aperture, the medium that refractive index is greater than unit base material refractive index is filled with in described aperture, the arrangement rule that described metamaterial unit forms described metamaterial sheet is: described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, the small pore volume that the metamaterial unit at described border circular areas place is formed is maximum, there is the small pore volume that the metamaterial unit at the annular region place of same radius is formed identical, along with the increase of radius, small pore volume that the metamaterial unit at the annular region place of respective radius is formed reduces and the changing value of the small pore volume that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the small pore volume formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
2. antenna for base station as claimed in claim 1, it is characterized in that: described antenna for base station also comprises reflector element, described reflector element is converged backward external radiation to described metamaterial panel by described metamaterial panel in order to the part reflection of electromagnetic wave that described at least one radiating doublet produced.
3. an antenna for base station, is characterized in that: described antenna for base station comprises: at least one radiating doublet, for generation of electromagnetic radiation as waves; Metamaterial panel, after the electromagnetic radiation as waves for described at least one radiating doublet being produced converges and to external radiation; Described metamaterial panel comprises substrate and multiple apertures of cycle arrangement on substrate;
Wherein, described metamaterial panel is formed by stacking by multiple metamaterial sheet with identical refraction index profile, described metamaterial sheet is made up of multiple metamaterial unit, multiple apertures that described metamaterial unit comprises unit base material and formed on described unit base material, namely whole unit base materials constitutes the substrate of metamaterial panel;
Described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, described border circular areas place refractive index is maximum, and the annular region place refractive index with same radius is identical; Radius is larger, and the refractive index at the annular region place that this radius is corresponding is less, and along with the increase of radius, the variable quantity of refractive index increases gradually;
Wherein, described metamaterial unit is formed with quantity difference, the aperture that volume is identical, the medium that refractive index is less than unit base material refractive index is filled with in described aperture, the arrangement rule that described metamaterial unit forms described metamaterial sheet is: described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, the aperture minimum number that the metamaterial unit at described border circular areas place is formed, the quantity with the aperture that the metamaterial unit at the annular region place of same radius is formed is identical, along with the increase of radius, the quantity of the aperture that the metamaterial unit at the annular region place of respective radius is formed also increases and the changing value of the quantity of the aperture that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the quantity of the aperture formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
4. an antenna for base station, is characterized in that: described antenna for base station comprises: at least one radiating doublet, for generation of electromagnetic radiation as waves; Metamaterial panel, after the electromagnetic radiation as waves for described at least one radiating doublet being produced converges and to external radiation; Described metamaterial panel comprises substrate and multiple apertures of cycle arrangement on substrate;
Wherein, described metamaterial panel is formed by stacking by multiple metamaterial sheet with identical refraction index profile, described metamaterial sheet is made up of multiple metamaterial unit, multiple apertures that described metamaterial unit comprises unit base material and formed on described unit base material, namely whole unit base materials constitutes the substrate of metamaterial panel;
Described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, described border circular areas place refractive index is maximum, and the annular region place refractive index with same radius is identical; Radius is larger, and the refractive index at the annular region place that this radius is corresponding is less, and along with the increase of radius, the variable quantity of refractive index increases gradually;
Wherein, described metamaterial unit is formed with quantity difference, the aperture that volume is identical, the medium that refractive index is greater than unit base material refractive index is filled with in described aperture, the arrangement rule that described metamaterial unit forms described metamaterial sheet is: described metamaterial sheet comprises one with the described metamaterial sheet central point border circular areas that is the center of circle and the concentric annular region of multiple and described border circular areas, the quantity of the aperture that the metamaterial unit at described border circular areas place is formed is maximum, the quantity with the aperture that the metamaterial unit at the annular region place of same radius is formed is identical, along with the increase of radius, the quantity of the aperture that the metamaterial unit at the annular region place of respective radius is formed reduces and the changing value of the quantity of the aperture that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the quantity of the aperture formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
5. an antenna for base station, is characterized in that: described antenna for base station comprises: at least one radiating doublet, for generation of electromagnetic radiation as waves; Metamaterial panel, after the electromagnetic radiation as waves for described at least one radiating doublet being produced converges and to external radiation; Described metamaterial panel comprises substrate and multiple apertures of cycle arrangement on substrate;
Wherein, described metamaterial panel is formed by stacking by multiple metamaterial sheet with identical refraction index profile, described metamaterial sheet is made up of multiple metamaterial unit, the aperture that described metamaterial unit comprises unit base material and formed on described unit base material, namely whole unit base materials constitutes the substrate of metamaterial panel;
Described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, described border circular areas place refractive index is maximum, and the annular region place refractive index with same radius is identical; Radius is larger, and the refractive index at the annular region place that this radius is corresponding is less, and along with the increase of radius, the variable quantity of refractive index increases gradually;
Wherein, each described metamaterial unit is formed with the aperture that volume is identical, the medium that refractive index is different is filled with in described aperture, the refraction index profile rule of the medium of filling in described aperture is: described metamaterial sheet comprises one and is greater than described border circular areas and the annular region concentric with described border circular areas with the described metamaterial sheet central point border circular areas that is the center of circle and multiple radius, the refractive index of the medium of filling in the aperture that the metamaterial unit at described border circular areas place is formed is maximum, there is the interior medium refraction index of filling of the aperture that the metamaterial unit at the annular region place of same radius is formed identical, along with the increase of radius, the refractive index of the medium of filling in the aperture that the metamaterial unit at the annular region place of respective radius is formed reduces and the changing value of the refractive index of the medium of filling in the aperture that metamaterial unit away from the two adjacent annular region places in the center of circle is formed is greater than the changing value of the refractive index of the medium of filling in the aperture that formed in the metamaterial unit at the two adjacent annular region places in the center of circle.
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|---|---|---|---|---|
| CN101867094A (en) * | 2010-05-02 | 2010-10-20 | 兰州大学 | Focusing panel antenna |
| JP2011112942A (en) * | 2009-11-27 | 2011-06-09 | Toyota Central R&D Labs Inc | Optical deflection element |
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| KR101202339B1 (en) * | 2009-04-29 | 2012-11-16 | 한국전자통신연구원 | Antenna with metamaterial superstrate simultaneosly providing high-gain and beam-width control |
| CN101699659B (en) * | 2009-11-04 | 2013-01-02 | 东南大学 | Lens antenna |
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| CN101867094A (en) * | 2010-05-02 | 2010-10-20 | 兰州大学 | Focusing panel antenna |
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