CN105006642A - Single-negative material separating plate and broadband high-isolation monopole array antenna - Google Patents
Single-negative material separating plate and broadband high-isolation monopole array antenna Download PDFInfo
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- CN105006642A CN105006642A CN201510366993.9A CN201510366993A CN105006642A CN 105006642 A CN105006642 A CN 105006642A CN 201510366993 A CN201510366993 A CN 201510366993A CN 105006642 A CN105006642 A CN 105006642A
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Abstract
The invention discloses a single-negative material separating plate and a broadband high-isolation monopole array antenna. The single-negative material separating plate is composed of a dielectric substrate, a metal coating covered on one side surface of the dielectric substrate and an etched pattern which is etched on the metal coating, wherein the etched pattern comprises four groups of slot seams, the four groups of slot seams share a common pattern center, and the four groups of slot seams are distributed from inside to outside in an embedded manner by taking the pattern center as a center. According to the single-negative material separating plate and the broadband high-isolation monopole array antenna, the small-sized and simple-structure single-negative material separating plate is loaded on a monopole array antenna, so as to suppress mutual coupling of the array antenna, thereby the broadband high-isolation array antenna is obtained finally.
Description
Technical field
The invention belongs to array antenna technique field, be specifically related to a kind of single-negative material division board and wideband high-isolation monopole array antenna.
Background technology
Antenna is pith indispensable in wireless communication system.Wherein, compared to the performance of isolated antenna, antenna array can obtain more superior antenna performance index, and thus array antenna is widely used in numerous communication system.But in the array antenna system of reality, antenna element is not isolated, there is electromagnetic coupled during the work of each antenna element and between other unit, we call the mutual coupling effect of array antenna this phenomenon.Especially in Small Distance array antenna system, such as MIMO (MultipleInput Multiple Output) system, GPS (Global Positioning System) system etc., the performance of pair array antenna is caused adverse effect by mutual coupling effect, such as radiation pattern distortion, input impedance change etc.Under the development trend of array antenna miniaturization, mutual coupling problem becomes the key issue that restriction array antenna performance improves.Therefore, the research of mutual coupling and the method for mutual coupling suppression have great significance in aerial array field.
At present, be applied to the method reducing array antenna mutual coupling effect and mainly contain two classes, these methods have important effect to raising array antenna performance.First kind method adopts algorithm and model describe out the mutual coupling characteristic of aerial array complexity thus utilize optimized algorithm to carry out mutual coupling compensation.Equations of The Second Kind method in array antenna design, introduces some special construction thus suppresses mutual coupling, such as defect ground structure (DGS, defected ground structure), electromagnetic bandgap structure (EBG, electromagneticbandgap) etc.Wherein, array antenna loading DGS structure or EBG structure in suppressing antenna mutual coupling, apply more method at present.But DGS structure needs to etch the line of rabbet joint on antenna floor, and electromagnetic energy will be leaked in the gap of etching, produces backward radiation.EBG structure needs multiple cycle, thus will occupy larger space and complex manufacturing technology, make array antenna compact to design become very difficult like this.Meanwhile, DGS structure and EBG structure are applied in the majority in plane microstrip antenna array mutual coupling suppresses, and are not suitable for applying in high hatching aerial array.
When the effective medium parameter (DIELECTRIC CONSTANT ε and magnetic permeability μ) of medium be negative value and another on the occasion of time, such medium can be referred to as single-negative material (SNG, single-negative metamaterial).Have due to the DIELECTRIC CONSTANT ε of single-negative material and magnetic permeability μ and only have one for negative value (ε μ <0), in material, electromagnetic wave propagation constant beta is 0 and attenuation constant α is greater than 0, in single-negative material, electromagnetic wave propagation is decay rapidly, and therefore single-negative material has band resistance electromagnetic transmission characteristic.According to the characteristic of single-negative material, single-negative material (as lametta or SRR ring) can be applied in array antenna the mutual coupling reduced between array antenna unit by us.Coupling between unit can be reduced about 20dB by this method again.But most of single-negative material is all strong resonance structure, their bin width all very narrow (as about 1%).The single-negative material of narrow bin width like this and the broadband trend of modern system do not match, and thus its application in antenna system is very restricted.2010, paper " application of magnetic single-negative material in high section MIMO monopole antenna array mutual coupling suppresses " (Electromagnetic CouplingReduction in High-Profile Monopole Antennas Using Single-Negative MagneticMetamaterials for MIMO Applications [J] .IEEE Trans.Antennas Propag. delivered by the Antennas And Propagation journal that Mohammed M.Bait-Suwailam etc. sponsors in American Electronic the Institution of Electrical Engineers, 2007,58 (9): 2894-2910.).By loading single negative SRR structure isolator in MIMO monopole antenna battle array in article, when substantially not affecting performance and the structure of array antenna, antenna element interval reaches more than 20dB from degree.But the 20dB isolation bandwidth of array antenna is only 4% in article.Meanwhile, the SRR spacer structures size of article is comparatively large, increases the volume of antenna array significantly thus is unfavorable for the miniaturization of antenna.Above-mentioned document shows, can reduce the coupling between array elements, thus obtain the array antenna of high-isolation by loading single-negative material division board.At present, there is no the simple and report of the wideband high-isolation monopole array antenna of the single-negative material division board that size is little of structure based.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of single-negative material division board and wideband high-isolation monopole array antenna, it is by little by size and the simple single-negative material division board of structure loads on monopole array antenna, to suppress the mutual coupling of array antenna, the final array antenna obtaining wideband high-isolation.
For solving the problem, the present invention is achieved by the following technical solutions:
Single-negative material division board, by medium substrate, wherein the metal coating of a side surface and the etched figure that is etched in metal coating are formed to overlay on medium substrate; Above-mentioned etched figure comprises 4 groups of lines of rabbet joint, and above-mentioned 4 groups of lines of rabbet joint have a common centre of figure, and these 4 groups of lines of rabbet joint are centered by centre of figure, and are embedded distribution from inside to outside; One group of line of rabbet joint i.e. first line of rabbet joint being wherein positioned at innermost layer comprises 4 identical right angle fan grooves, the distribution and these 4 right angle fan grooves are centrosymmetric centered by centre of figure; One group of line of rabbet joint i.e. second line of rabbet joint being positioned at time internal layer is the circular line of rabbet joint of I-shaped, the circular line of rabbet joint of this I-shaped is made up of 1 circular recess and 4 identical T-slots, above-mentioned circular recess take centre of figure as the center of circle, the lower end of 4 T-slots is all connected with circular recess, the distribution and 4 T-slots are centrosymmetric centered by centre of figure; Being positioned at time outer field one group of line of rabbet joint i.e. the 3rd line of rabbet joint is the gear shape line of rabbet joint, and this gear shape line of rabbet joint has 8 identical rectangle teeth groove, the distribution and these 8 rectangle teeth groove are centrosymmetric centered by centre of figure; Being positioned at outermost one group of line of rabbet joint i.e. the 4th line of rabbet joint is the positive circular line of rabbet joint, and this positive circular line of rabbet joint take centre of figure as the center of circle.
Described etched figure symmetrical center line is in a circumferential direction mutually corresponding, namely 4 right angle fan grooves of first line of rabbet joint be sewn on centre symmetry line circumferentially respectively towards southeastern direction, southwestward, northwest to and northeastward; 4 T-slots of second line of rabbet joint centre symmetry line in a circumferential direction respectively towards direction, due east, Due South to, positive west to and direct north; 8 rectangle teeth groove of the 3rd line of rabbet joint centre symmetry line in a circumferential direction respectively towards direction, due east, southeastern direction, Due South to, southwestward, positive west to, northwest to, direct north and northeastward.
Described medium substrate is in square.
Wideband high-isolation monopole array antenna, comprises ground plate and is erected on 2 monopole array elements on ground plate; Single-negative material division board is provided with between above-mentioned 2 monopole array elements; Should by medium substrate, overlay on a medium substrate wherein side surface forming towards the metal coating of one of them monopole array element and the etched figure that is etched in metal coating; Above-mentioned etched figure comprises 4 groups of lines of rabbet joint, and above-mentioned 4 groups of lines of rabbet joint have a common centre of figure, and these 4 groups of lines of rabbet joint are centered by centre of figure, and are embedded distribution from inside to outside; One group of line of rabbet joint i.e. first line of rabbet joint being wherein positioned at innermost layer comprises 4 identical right angle fan grooves, the distribution and these 4 right angle fan grooves are centrosymmetric centered by centre of figure; One group of line of rabbet joint i.e. second line of rabbet joint being positioned at time internal layer is the circular line of rabbet joint of I-shaped, the circular line of rabbet joint of this I-shaped is made up of 1 circular recess and 4 identical T-slots, above-mentioned circular recess take centre of figure as the center of circle, the lower end of 4 T-slots is all connected with circular recess, the distribution and 4 T-slots are centrosymmetric centered by centre of figure; Being positioned at time outer field one group of line of rabbet joint i.e. the 3rd line of rabbet joint is the gear shape line of rabbet joint, and this gear shape line of rabbet joint has 8 identical rectangle teeth groove, the distribution and these 8 rectangle teeth groove are centrosymmetric centered by centre of figure; Being positioned at outermost one group of line of rabbet joint i.e. the 4th line of rabbet joint is the positive circular line of rabbet joint, and this positive circular line of rabbet joint take centre of figure as the center of circle.
Described etched figure symmetrical center line is in a circumferential direction mutually corresponding, namely 4 right angle fan grooves of first line of rabbet joint be sewn on centre symmetry line circumferentially respectively towards southeastern direction, southwestward, northwest to and northeastward; 4 T-slots of second line of rabbet joint centre symmetry line in a circumferential direction respectively towards direction, due east, Due South to, positive west to and direct north; 8 rectangle teeth groove of the 3rd line of rabbet joint centre symmetry line in a circumferential direction respectively towards direction, due east, southeastern direction, Due South to, southwestward, positive west to, northwest to, direct north and northeastward.
Described single-negative material division board is in the midpoint of 2 monopole array elements.
Described medium substrate is in square.
Compared with prior art, the present invention's feature specific as follows:
1. the partition plate structure of single-negative material described in the present invention is simple, and cost of manufacture is low, is adapted to integrated batch machining.Because single-negative material division board size is less, the impact of the introducing pair array antenna volume of division board is very little.
2. the wideband high-isolation monopole array antenna based on single-negative material division board of the present invention, after described monopole array antenna loads single-negative material division board, mutual coupling rejection can reach more than 20dB, and 20dB isolation bandwidth reaches more than 10%.When obtaining wideband high-isolation monopole array, after loading single-negative material division board, the operating frequency of array and bandwidth do not produce significant change.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of single-negative material division board.
Fig. 2 is a kind of structural representation of wideband high-isolation monopole array antenna.
Fig. 3 is the TEM waveguide simulation model figure of single-negative material division board.
Fig. 4 is the effective medium parameter of single-negative material division board.
Fig. 5 is the S parameter comparison diagram of the S parameter of the monopole array having set up single-negative material division board and the monopole array without single-negative material division board.
Number in the figure: 1, single-negative material division board; 1-1, medium substrate; 1-2, metal coating; 1-3, etched figure; 1-3-1, first line of rabbet joint; 1-3-2, second line of rabbet joint; 1-3-3, the 3rd line of rabbet joint; 1-3-4, the 4th line of rabbet joint; 2, monopole array element; 3, ground plate.
Embodiment
A kind of single-negative material division board, as shown in Figure 1, by medium substrate 1-1, overlay on medium substrate 1-1 wherein the metal coating 1-2 of a side surface and the etched figure 1-3 that is etched in metal coating 1-2 form.Above-mentioned single-negative material division board 1 is similar to the conventional printed circuit board of circuit field.The shape of medium substrate 1-1 can set according to design requirement, as being circular, polygon or square, with make its its to meet size little and be easy to the requirement of processing and fabricating as far as possible.Etched figure 1-3 uses printed circuit technique to be printed on the medium substrate 1-1 of one-sided metallic coating 1-2.
Etched figure 1-3 is the design core of single-negative material division board 1, and its concrete shape determines the performance of this division board.In the present invention, etched figure 1-3 comprises 4 groups of lines of rabbet joint, and above-mentioned 4 groups of lines of rabbet joint have a common centre of figure, and these 4 groups of lines of rabbet joint are centered by centre of figure, and are embedded distribution from inside to outside.One group of line of rabbet joint i.e. the first line of rabbet joint 1-3-1 being positioned at innermost layer comprises 4 identical right angle fan grooves, the distribution and these 4 right angle fan grooves are centrosymmetric centered by centre of figure.One group of line of rabbet joint i.e. the second line of rabbet joint 1-3-2 being positioned at time internal layer is the circular line of rabbet joint of I-shaped, the circular line of rabbet joint of this I-shaped is made up of 1 circular recess and 4 identical T-slots, above-mentioned circular recess take centre of figure as the center of circle, the lower end of 4 T-slots is all connected with circular recess, the distribution and 4 T-slots are centrosymmetric centered by centre of figure.Being positioned at time outer field one group of line of rabbet joint i.e. the 3rd line of rabbet joint 1-3-3 is the gear shape line of rabbet joint, and this gear shape line of rabbet joint has 8 identical rectangle teeth groove, the distribution and these 8 rectangle teeth groove are centrosymmetric centered by centre of figure.Being positioned at outermost one group of line of rabbet joint i.e. the 4th line of rabbet joint 1-3-4 is the positive circular line of rabbet joint, and this positive circular line of rabbet joint take centre of figure as the center of circle.
4 groups of lines of rabbet joint symmetrical center line in a circumferential direction of above-mentioned etched figure 1-3 can stagger mutually, but also can according to performance requirement, as shown in the preferred embodiment of the present invention, 4 groups of lines of rabbet joint symmetrical center line in a circumferential direction of etched figure 1-3 is mutually corresponding, that is: 4 right angle fan grooves of the first line of rabbet joint 1-3-1 be sewn on centre symmetry line circumferentially respectively towards southeastern direction, southwestward, northwest to and northeastward.4 T-slots of the second line of rabbet joint 1-3-2 centre symmetry line in a circumferential direction respectively towards direction, due east, Due South to, positive west to and direct north.8 rectangle teeth groove of the 3rd line of rabbet joint 1-3-3 centre symmetry line in a circumferential direction respectively towards direction, due east, southeastern direction, Due South to, southwestward, positive west to, northwest to, direct north and northeastward.4th line of rabbet joint 1-3-4 is positive circular, and therefore its symmetrical center line in a circumferential direction also can be considered as towards above-mentioned all directions.
Based on a kind of wideband high-isolation monopole array antenna of above-mentioned single-negative material division board 1, as shown in Figure 2,2 the monopole array elements 2 comprising ground plate 3 and be erected on ground plate 3.Single-negative material division board 1 is provided with between above-mentioned 2 monopole array elements 2.In order to more effectively play the buffer action of division board, in a preferred embodiment of the invention, described single-negative material division board 1 is in the midpoint of 2 monopole array elements 2.When the height of single-negative material division board 1 is much smaller than the height of monopole array antenna, single-negative material division board 1 from top to down of more than 2 or 2 can be selected to overlay between 2 monopole array elements 2.When the number of monopole array element 2 is the even number of more than 2 on same ground plate 3 (as during for 4 monopole array element 2), then 1 single-negative material division board 1 is set between every 2 monopole array elements 2.Single-negative material division board 1 is loaded on monopole array antenna, thus suppresses the mutual coupling of array antenna, the final array antenna obtaining wideband high-isolation.When effectively suppressing mutual coupling, the operating frequency and the bandwidth that load the rear array of single-negative material division board 1 do not produce significant change.
Above-mentioned single-negative material division board 1 by medium substrate 1-1, overlay on a medium substrate 1-1 wherein side surface forming towards the metal coating 1-2 of one of them monopole the array element 2 and etched figure 1-3 that is etched in metal coating 1-2.Above-mentioned single-negative material division board 1 is similar to the conventional printed circuit board of circuit field.The shape of medium substrate 1-1 can set according to design requirement, as being circle, polygon or square, meets the little requirement with being easy to processing and fabricating of size to make it as far as possible.Etched figure 1-3 uses printed circuit technique to be printed on the medium substrate 1-1 of one-sided metallic coating 1-2.
Etched figure 1-3 is the design core of single-negative material division board 1, and its concrete shape determines the performance of this division board.In the present invention, etched figure 1-3 comprises 4 groups of lines of rabbet joint, and above-mentioned 4 groups of lines of rabbet joint have a common centre of figure, and these 4 groups of lines of rabbet joint are centered by centre of figure, and are embedded distribution from inside to outside.One group of line of rabbet joint i.e. the first line of rabbet joint 1-3-1 being positioned at innermost layer comprises 4 identical right angle fan grooves, the distribution and these 4 right angle fan grooves are centrosymmetric centered by centre of figure.One group of line of rabbet joint i.e. the second line of rabbet joint 1-3-2 being positioned at time internal layer is the circular line of rabbet joint of I-shaped, the circular line of rabbet joint of this I-shaped is made up of 1 circular recess and 4 identical T-slots, above-mentioned circular recess take centre of figure as the center of circle, the lower end of 4 T-slots is all connected with circular recess, the distribution and 4 T-slots are centrosymmetric centered by centre of figure.Being positioned at time outer field one group of line of rabbet joint i.e. the 3rd line of rabbet joint 1-3-3 is the gear shape line of rabbet joint, and this gear shape line of rabbet joint has 8 identical rectangle teeth groove, the distribution and these 8 rectangle teeth groove are centrosymmetric centered by centre of figure.Being positioned at outermost one group of line of rabbet joint i.e. the 4th line of rabbet joint 1-3-4 is the positive circular line of rabbet joint, and this positive circular line of rabbet joint take centre of figure as the center of circle.
4 groups of lines of rabbet joint symmetrical center line in a circumferential direction of above-mentioned etched figure 1-3 can stagger mutually, but also can according to performance requirement, as shown in the preferred embodiment of the present invention, 4 groups of lines of rabbet joint symmetrical center line in a circumferential direction of etched figure 1-3 is mutually corresponding, that is: 4 right angle fan grooves of the first line of rabbet joint 1-3-1 be sewn on centre symmetry line circumferentially respectively towards southeastern direction, southwestward, northwest to and northeastward.4 T-slots of the second line of rabbet joint 1-3-2 centre symmetry line in a circumferential direction respectively towards direction, due east, Due South to, positive west to and direct north.8 rectangle teeth groove of the 3rd line of rabbet joint 1-3-3 centre symmetry line in a circumferential direction respectively towards direction, due east, southeastern direction, Due South to, southwestward, positive west to, northwest to, direct north and northeastward.4th line of rabbet joint 1-3-4 is because positive circular, and therefore its symmetrical center line in a circumferential direction also can be considered as towards above-mentioned all directions.
As the operating frequency f of monopole array antenna
0time, described single-negative material division board 1 is at f
0near present the characteristic (DIELECTRIC CONSTANT ε of material and magnetic permeability μ have and only have for negative value, ε μ <0) of single-negative material.In the preferred embodiment of the present invention, provide operating frequency f
0for the binary monopole array of 5GHz.Medium substrate 1-1 and metal coating 1-2 thereof is all in square.Medium substrate 1-1 adopts ArlonAD260A, and dielectric constant is 2.6, and thickness is 1mm, size W is 16mm.Therefore, described single-negative material division board 1 size is only 16mm × 16mm × 1mm (0.26 λ
0× 0.26 λ
0× 0.02 λ
0, λ
0for array antenna operation wavelength).The length of side a of metal coating 1-2 is 15mm.The width of the 4th line of rabbet joint 1-3-4 is 0.5mm, and the width of the 3rd line of rabbet joint 1-3-3 is 0.3mm, and the width of the second line of rabbet joint 1-3-2 is 0.2mm, and the right angle fan groove radius in the first line of rabbet joint 1-3-1 is 0.8mm.The radius r of the 4th line of rabbet joint 1-3-4
4for 7mm, the radius r of the 3rd line of rabbet joint 1-3-3
3for 6mm, the radius r of the second line of rabbet joint 1-3-2
2for 2mm, the radius r of the first line of rabbet joint 1-3-1
1for 0.9mm.
In the present embodiment, described single-negative material division board 1 is at operating frequency f
0near present the characteristic (DIELECTRIC CONSTANT ε of material and magnetic permeability μ have and only have for negative value, ε μ <0) of single-negative material.The division board 1 of single-negative material shown in Fig. 1 structure is positioned in TEM waveguide, electromagnetic wave propagation direction is y direction, the wave guide wall arranging z direction and x direction is respectively desired electrical border (PEC) and desirable magnetic border (PMC), as shown in Figure 3.The effective medium parameter (shown in Fig. 4) of described single-negative material division board 1 is obtained by HFSS 13 simulation calculation, as seen from the figure, magnetic permeability real part Re (ε
eff) there is negative peak at 5GHz place, structure produces magnetic resonance.Re (ε in 5GHz to 5.4GHz scope
eff) be negative value Re (μ
eff) keep on the occasion of, in this frequency range, described division board is rendered as single-negative material characteristic.5GHz to 5.4GHz frequency range is the work isolation frequency range of described single-negative material division board 1.
Therefore, monopole array operation frequency f in the present embodiment
0(5GHz) just in time drop in the work isolation frequency range of single-negative material division board 1.Fig. 5 provides the S parameter of the S parameter of the embodiment of the present invention and the monopole array without described single-negative material division board 1.As seen from the figure, when not loading single-negative material division board 1, binary monopole array reaches-12dB at operating frequency 5GHz place coupling coefficient.After loading SNG-CRR division board, when not affecting array operation frequency and bandwidth, between 5GHz place unit, coupling coefficient is-35dB.After introducing described single-negative material division board 1, between array element, the degree of coupling reduces 23dB, and 20dB isolation bandwidth reaches 12%.
The above is embodiments of the invention, just understanding technical scheme of the present invention and core concept for helping, being not limited to the present invention.Those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when above-mentioned method and technology contents can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, still belong in the scope of technical solution of the present invention.The content of this specification is not limitation of the present invention.
Claims (7)
1. single-negative material division board, is characterized in that: by medium substrate (1-1), wherein the metal coating (1-2) of a side surface and the etched figure (1-3) that is etched in metal coating (1-2) are formed to overlay on medium substrate (1-1);
Above-mentioned etched figure (1-3) comprises 4 groups of lines of rabbet joint, and above-mentioned 4 groups of lines of rabbet joint have a common centre of figure, and these 4 groups of lines of rabbet joint are centered by centre of figure, and are embedded distribution from inside to outside; Wherein
One group of line of rabbet joint i.e. first line of rabbet joint (1-3-1) being positioned at innermost layer comprises 4 identical right angle fan grooves, the distribution and these 4 right angle fan grooves are centrosymmetric centered by centre of figure;
Be positioned at one group of line of rabbet joint i.e. second line of rabbet joint (1-3-2) of time internal layer for the circular line of rabbet joint of I-shaped, the circular line of rabbet joint of this I-shaped is made up of 1 circular recess and 4 identical T-slots, above-mentioned circular recess take centre of figure as the center of circle, the lower end of 4 T-slots is all connected with circular recess, the distribution and 4 T-slots are centrosymmetric centered by centre of figure;
Being positioned at time outer field one group of line of rabbet joint i.e. the 3rd line of rabbet joint (1-3-3) is the gear shape line of rabbet joint, and this gear shape line of rabbet joint has 8 identical rectangle teeth groove, the distribution and these 8 rectangle teeth groove are centrosymmetric centered by centre of figure;
Being positioned at outermost one group of line of rabbet joint i.e. the 4th line of rabbet joint (1-3-4) is the positive circular line of rabbet joint, and this positive circular line of rabbet joint take centre of figure as the center of circle.
2. single-negative material division board according to claim 1, is characterized in that: described etched figure (1-3) symmetrical center line is in a circumferential direction mutually corresponding, namely
4 right angle fan grooves of first line of rabbet joint (1-3-1) be sewn on centre symmetry line circumferentially respectively towards southeastern direction, southwestward, northwest to and northeastward;
4 T-slots of second line of rabbet joint (1-3-2) centre symmetry line in a circumferential direction respectively towards direction, due east, Due South to, positive west to and direct north;
8 rectangle teeth groove of the 3rd line of rabbet joint (1-3-3) centre symmetry line in a circumferential direction respectively towards direction, due east, southeastern direction, Due South to, southwestward, positive west to, northwest to, direct north and northeastward.
3. single-negative material division board according to claim 1, is characterized in that: described medium substrate (1-1) is in square.
4. wideband high-isolation monopole array antenna, comprises ground plate (3) and is erected on 2 monopole array elements (2) on ground plate (3); It is characterized in that: between above-mentioned 2 monopole array elements (2), be provided with single-negative material division board (1);
Should by medium substrate (1-1), overlay on medium substrate (1-1) wherein side surface forming towards the metal coating (1-2) of one of them monopole array element (2) and the etched figure (1-3) that is etched in metal coating (1-2);
Above-mentioned etched figure (1-3) comprises 4 groups of lines of rabbet joint, and above-mentioned 4 groups of lines of rabbet joint have a common centre of figure, and these 4 groups of lines of rabbet joint are centered by centre of figure, and are embedded distribution from inside to outside; Wherein
One group of line of rabbet joint i.e. first line of rabbet joint (1-3-1) being positioned at innermost layer comprises 4 identical right angle fan grooves, the distribution and these 4 right angle fan grooves are centrosymmetric centered by centre of figure;
Be positioned at one group of line of rabbet joint i.e. second line of rabbet joint (1-3-2) of time internal layer for the circular line of rabbet joint of I-shaped, the circular line of rabbet joint of this I-shaped is made up of 1 circular recess and 4 identical T-slots, above-mentioned circular recess take centre of figure as the center of circle, the lower end of 4 T-slots is all connected with circular recess, the distribution and 4 T-slots are centrosymmetric centered by centre of figure;
Being positioned at time outer field one group of line of rabbet joint i.e. the 3rd line of rabbet joint (1-3-3) is the gear shape line of rabbet joint, and this gear shape line of rabbet joint has 8 identical rectangle teeth groove, the distribution and these 8 rectangle teeth groove are centrosymmetric centered by centre of figure;
Being positioned at outermost one group of line of rabbet joint i.e. the 4th line of rabbet joint (1-3-4) is the positive circular line of rabbet joint, and this positive circular line of rabbet joint take centre of figure as the center of circle.
5. single-negative material division board (1) according to claim 4, is characterized in that: described etched figure (1-3) symmetrical center line is in a circumferential direction mutually corresponding, namely
4 right angle fan grooves of first line of rabbet joint (1-3-1) be sewn on centre symmetry line circumferentially respectively towards southeastern direction, southwestward, northwest to and northeastward;
4 T-slots of second line of rabbet joint (1-3-2) centre symmetry line in a circumferential direction respectively towards direction, due east, Due South to, positive west to and direct north;
8 rectangle teeth groove of the 3rd line of rabbet joint (1-3-3) centre symmetry line in a circumferential direction respectively towards direction, due east, southeastern direction, Due South to, southwestward, positive west to, northwest to, direct north and northeastward.
6. the single-negative material division board (1) according to claim 4 or 5, is characterized in that: described single-negative material division board (1) is in the midpoint of 2 monopole array elements (2).
7. single-negative material division board (1) according to claim 4, is characterized in that: described medium substrate (1-1) is in square.
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