CN105449354B - A kind of low-cross coupling antenna array using the double via electromagnetic bandgap structures of Fermat archimedean spiral groove line - Google Patents
A kind of low-cross coupling antenna array using the double via electromagnetic bandgap structures of Fermat archimedean spiral groove line Download PDFInfo
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- CN105449354B CN105449354B CN201510956626.4A CN201510956626A CN105449354B CN 105449354 B CN105449354 B CN 105449354B CN 201510956626 A CN201510956626 A CN 201510956626A CN 105449354 B CN105449354 B CN 105449354B
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- electromagnetic bandgap
- spiral groove
- fermat
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- groove line
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The present invention provides a kind of low-cross coupling antenna array using the double via electromagnetic bandgap structures of Fermat archimedean spiral groove line, including the double via electromagnetic bandgap structures of Fermat archimedean spiral groove line and quaternary circular polarization antenna array.The double via electromagnetic bandgap structures of Fermat archimedean spiral groove line are combined by multiple electromagnetic bandgap structure units by periodic arrangement, and the length-width ratio of electromagnetic bandgap structure unit is 3:1, the Fermat line of rabbet joint among unit is connected with two same number of turns positioned at unit both ends, the archimedean spiral groove line of identical rotation direction, and two metallization VIAs are respectively positioned at the center of two archimedean spiral groove lines.Quaternary circular polarization antenna array is coaxial feeding, and antenna element is rotated by 90 ° successively.The double via electromagnetic bandgap structures of Fermat archimedean spiral groove line of the present invention realize miniaturization, significantly reduce mutual coupling between antenna element, improve the radiance of antenna array.
Description
Technical field
The present invention relates to a kind of miniaturization electromagnetic bandgap structure in field of antenna application, a kind of more particularly to use is taken
The low-cross coupling antenna array of the double via electromagnetic bandgap structures of horse-archimedean spiral groove line.
Background technology
With flourishing for electronic information technology, application of the antenna in various equipment is also more extensive.In order to adapt to
The high demand of the integrated levels of Modern communication devices, the research and development of antenna also stride forward to miniaturization, while to the performance requirement of antenna
More and more higher.Wherein array antenna not only realizes miniaturization, and drastically increases directionality and the gain of antenna.But
Realizing that the array element of antenna is constantly close, and mutual coupling can be caused more serious, i.e., on an antenna while miniaturization
Electric current can produce induced-current on another antenna, influence the performances such as gain, the directional diagram of aerial array, make the one of aerial array
Individual or multiple units can not normal work.It would therefore be desirable to suppressed by various modes in aerial array between each antenna element
Mutual coupling.Electromagnetic bandgap structure can prevent the Electromagnetic Wave Propagation of special frequency channel, reach the mutual coupling suppressed between array antenna unit
Target.
Found according to retrieval, related research has been carried out in the design for suppressing structure for mutual coupling, it has been suggested that mutual coupling
Suppress structure and cover various shapes.It is mushroom-shaped structure that most common of which mutual coupling, which suppresses structure, but construction unit is larger;For
Reducing unit physical dimension, many greater compactness of structures are suggested, for example the small-scale structure that Alexander Stark are proposed is more
The densification of array is easily realized, but structure is more complicated, and difficulty of processing is big;Tang Wanchun etc. proposes a kind of C-shaped grooves plane electricity
Ultra wide, effectively suppress simultaneous switching noise and reduce the use of decoupling capacitor;The designs such as Zhang Daoliang it is a kind of small-sized more
Band electromagnetic bandgap structure, by etching four centrosymmetric F shapes grooves, formed while extending equivalent current path multiple humorous
Shake loop, realizes the comprehensive Design of miniaturization and multiband.The present invention is using archimedean spiral groove line and the Fermat line of rabbet joint
The line of rabbet joint is combined, electromagnetic bandgap structure unit also non-square, relatively conventional electromagnetic bandgap structure, the free degree of design is bigger, should
With more flexibly, degree of miniaturization is also higher.
The content of the invention
The technical problems to be solved by the invention:Overcome the deficiencies in the prior art, there is provided one kind uses Fermat-Archimedes
The double via electromagnetic bandgap structures of the spiral line of rabbet joint cause the mutual coupling between quaternary circular polarization antenna array to reduce, and improve antenna array performance.
The technical solution adopted by the present invention is:One kind is using the double via electro-magnetic bandgap knots of Fermat-archimedean spiral groove line
The low-cross coupling antenna array of structure, including the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line and quaternary circular polarized antenna
Battle array, wherein:
The double via electromagnetic bandgap structures of described Fermat-archimedean spiral groove line include metal patch, electro-magnetic bandgap knot
Structure medium substrate, metal floor, metallization VIA, manhole and square through hole, electromagnetic bandgap structure medium substrate have flat
Capable first surface and second surface, first surface are the metal patch of periodic arrangement, and second surface is metal floor;
Described quaternary circular polarization antenna array include radiation patch, antenna medium substrates, metal floor, metallization VIA and
Manhole, antenna medium substrates have parallel a first surface and second surface, and first surface is radiation patch, second surface
For metal floor.
Wherein, electromagnetic bandgap structure unit is bimetallic via structure, and its length-width ratio is 3:1, unit spacing is equal.
Wherein, the first surface of electromagnetic bandgap structure medium substrate can along long side for the rectangular metal paster of periodic arrangement
It is divided into three parts, is designated as the 1st subelement, the 2nd subelement and the 3rd subelement successively, the 1st subelement has with the 3rd subelement center
Metallization VIA, and the archimedean spiral groove line with same number of turns and identical rotation direction, archimedean spiral groove line starting point point
Wei Yu not metallization VIA inner side.The Fermat line of rabbet joint is located at the 2nd subelement, line of rabbet joint both ends by the 1st subelement and the 3rd subelement Ah
Base Mead spiral line of rabbet joint end is connected.Archimedean spiral groove line, the Fermat line of rabbet joint and the 3rd of the 2nd subelement of 1st subelement
Three line of rabbet joint of archimedean spiral groove line of subelement are connected.
Wherein, described square through hole is located at four angles of electromagnetic bandgap structure medium substrate, each square through hole corner
Surrounding is placed with four manholes.
Wherein, radiation patch is square, and circular polarisation is realized by the diagonal corner cut of paster, using coaxial feeding, coaxially
Line inner wire is mutually welded by metallization VIA with radiation patch, the gold of coaxial outer conductor and antenna medium substrates second surface
Possession plate mutually welds, and four circular polarized antenna units are located at the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Corner, and being rotated by 90 ° successively, the feeding coaxial lines of antenna element by the square through hole of electromagnetic bandgap structure medium substrate, according to
It is secondary to pass through electromagnetic bandgap structure medium substrate first surface and second surface.
Wherein, there are four manholes circular polarized antenna unit corner, with the double via electricity of Fermat-archimedean spiral groove line
Four manhole diameters around four square through holes of ultra wide are identical with pitch of holes, for circular polarized antenna to be consolidated
It is scheduled on the first surface of electromagnetic bandgap structure medium substrate.
The principle of the present invention is:
A kind of low-cross coupling antenna array using the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line, including:Take
The double via electromagnetic bandgap structures of horse-archimedean spiral groove line and quaternary circular polarization antenna array, its structure are realized as follows:
The double via electromagnetic bandgap structures of described Fermat-archimedean spiral groove line include:Metal patch, electro-magnetic bandgap knot
Structure medium substrate, metal floor, metallization VIA, manhole and square through hole.Electromagnetic bandgap structure medium substrate has flat
Capable first surface and second surface, first surface are the metal patch of periodic arrangement, and second surface is metal floor.Take
The double via electromagnetic bandgap structure unit length-width ratios of horse-archimedean spiral groove line are 3:1, unit spacing is equal;Medium substrate
First surface is the rectangular metal paster of periodic arrangement, and metal patch spacing is equal.Fermat-archimedean spiral groove line is double
Four square through holes of via electromagnetic bandgap structure are located at four angles of medium substrate, arrange four around each square through hole corner
Individual manhole, the position of four manholes wherein around square through hole and the circle of quaternary circular polarized antenna array element are led to
Hole is engaged, for fixed antenna array.
The rectangular metal paster of periodic arrangement electromagnetic bandgap structure unit can be divided into three parts along long side, be designated as successively
1 subelement, the 2nd subelement and the 3rd subelement, every is partly square.There is gold at 1st subelement and the 3rd subelement center
Categoryization via, and the archimedean spiral groove line with same number of turns and identical rotation direction, archimedean spiral groove line starting point difference
On the inside of metallization VIA.The Fermat line of rabbet joint is located at the 2nd subelement, and line of rabbet joint both ends are by the 1st subelement and the A Ji of the 3rd subelement
Mead spiral line of rabbet joint end is connected.The archimedean spiral groove line of 1st subelement, the Fermat line of rabbet joint of the 2nd subelement and the 3rd son
Three line of rabbet joint of archimedean spiral groove line of unit are connected.Described quaternary circular polarization antenna array includes:Radiation patch, antenna
Medium substrate, metal floor, metallization VIA and manhole.Antenna medium substrates have parallel first surface and the second table
Face.First surface is radiation patch, and second surface is metal floor.Radiation patch is square, real by the diagonal corner cut of paster
Existing circular polarisation, using coaxial feeding, coaxial inner conductor is mutually welded by metallization VIA with radiation patch, is led outside coaxial line
Body mutually welds with antenna medium substrates second surface metal floor.Four circular polarized antenna units are located at Fermat-Archimedes's spiral shell
The corner of the double via electromagnetic bandgap structures of spin slot line, and be rotated by 90 ° successively.The feeding coaxial lines of antenna element pass through electromagnetic belt
The square through hole of gap structure medium substrate, sequentially pass through electromagnetic bandgap structure medium substrate first surface and second surface.
A kind of low-cross coupling antenna array using the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line of the present invention
Technical scheme, have the advantages that:
(1), the present invention uses Fermat-archimedean spiral groove line and double via structures, increases equivalent inductance, is advantageous to reality
The miniaturization of existing electromagnetic bandgap structure and broadband, has expanded the application of electromagnetic bandgap structure.
(2) it is, of the invention by quaternary circular polarization antenna array and the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
It is combined, can more efficiently suppresses mutual coupling between antenna element.
(3), the present invention is a kind of low-cross coupling antenna of the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Battle array, be available for optimization design parameter it is more, design freedom is big.
Brief description of the drawings
Figure 1A is the embodiment of the present invention using the low mutual of the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Coupling antenna array front plan view;
Figure 1B is the embodiment of the present invention using the low mutual of the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Coupling antenna array side view;
Fig. 1 C are the embodiment of the present invention using the low mutual of the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Coupling antenna array back side top view;
Fig. 2A is that the unit front of the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line of present example is bowed
View;
Fig. 2 B are that the cell side of the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line of present example regards
Figure;
Fig. 3 is the low-cross coupling antenna of the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line of present example
Battle array is compared with traditional quaternary circular polarization antenna array inter-element mutual coupling simulation result.
The implication of reference is in figure:
100:First surface;
101:Metal patch;
200:Second surface;
201:Metal floor;
300:Electromagnetic bandgap structure medium substrate;
301:Electromagnetic bandgap structure manhole;
302:Square through hole;
303:Electromagnetic bandgap structure metallization VIA;
400:Antenna element;
401:Radiation patch;
402:Antenna medium substrates;
403:The metal floor of antenna;
404:Radiation patch corner cut;
405:The manhole of antenna;
406:The metallization VIA of antenna;
500:Electromagnetic bandgap structure unit;
501:1st subelement of electromagnetic bandgap structure unit;
502:2nd subelement of electromagnetic bandgap structure unit;
503:3rd subelement of electromagnetic bandgap structure unit;
601:The archimedean spiral groove line of 1st subelement;
602:The Fermat line of rabbet joint;
603:The archimedean spiral groove line of 3rd subelement;
L:The metal ground plate length of side;
L1:The medium substrate length of side of antenna;
H2:The dielectric substrate thickness of antenna;
a:The length of side of square through hole;
r:The radius of manhole;
W1:The distance between manhole;
g:Interval between electromagnetic bandgap structure unit;
H:The thickness of electromagnetic bandgap structure medium substrate;
L2:Electromagnetic bandgap structure unit long side;
W2:Electromagnetic bandgap structure unit broadside;
W3:The width of the line of rabbet joint;
W4:The distance at the bimetallic via center of electromagnetic bandgap structure unit;
L3:The length of side of the radiation patch of circularly-polarized patch antenna;
R:The radius of metallization VIA.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Figure 1A to Fig. 1 C is the overall schematic of present pre-ferred embodiments, and Fig. 2A to Fig. 2 B is taking for present example
The cell schematics of the double via electromagnetic bandgap structures of horse-archimedean spiral groove line.
As shown in Figure 1A to Fig. 1 C, the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line include electro-magnetic bandgap
Structured media substrate 300, metal patch 101, metallization VIA 303, square through hole 302, manhole 301 and metal floor
201.Electromagnetic bandgap structure medium substrate 300 has the first surface 100 and second surface 200 being parallel to each other, wherein the second table
Face 200 is metal ground plate 201.Metal patch 101 is located at first surface 100, by the double vias of Fermat-archimedean spiral groove line
Electromagnetic bandgap structure unit 500 forms according to 5 × 15 periodic arrangements.Metallization VIA 303 runs through electromagnetic bandgap structure medium base
Plate 300.Square through hole 302 is located at four angles of electromagnetic bandgap structure medium substrate 300, and the surrounding of square through hole 302 arranges four
Individual manhole 301.
As shown in Fig. 2A to Fig. 2 B, between the double via electromagnetic bandgap structure units 500 of Fermat-archimedean spiral groove line
Spacing g is equal.Electromagnetic bandgap structure unit 500 includes two metallization VIAs 303, and its metal patch 101 is square along long side (L2)
To three parts can be divided into, the 1st subelement 501, the 2nd subelement 502 and the 3rd subelement 503 are designated as;1st subelement 501 and the 3rd
There are metallization VIA 303, and the archimedean spiral groove line with same number of turns and identical rotation direction in the center of subelement 503 respectively,
Archimedean spiral groove line starting point is respectively positioned at the inner side of metallization VIA 303.The Fermat line of rabbet joint 602 is located at the 2nd subelement 502, groove
Line both ends and the end of archimedean spiral groove line 601 of the 1st subelement 501 and the archimedean spiral groove line of the 3rd subelement 503
603 ends are connected so that archimedean spiral groove line 601, the Fermat line of rabbet joint 602 of the 2nd subelement 502 of the 1st subelement 501
It is connected with 603 3 articles of line of rabbet joint of archimedean spiral groove line of the 3rd subelement 503.
As shown in Figure 1A to Fig. 1 C, Fig. 2A to Fig. 2 B:The double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line are adopted
With the printed circuit sheet material of double-sided copper-clad, it is process by PCB plate-making technologies.Specific preferred embodiment, electromagnetic bandgap structure
The length of side L of medium substrate 300 is 210mm, and thickness H is 2mm, and dielectric constant 2.9, the material of metal patch is copper.Metal floor
200 material is copper, long and a width of 210mm.The radius of metallization VIA 303 is 0.5mm, the length of square through hole 302 and a width of
22.0mm, the manhole 301 of electromagnetic bandgap structure and the radius of manhole 405 of antenna are 0.5mm.
As shown in Fig. 2A to Fig. 2 B, the double via electromagnetic bandgap structure unit length-width ratios of Fermat-archimedean spiral groove line are
3:1, long L2 are 39mm, and wide W2 is 13mm.The line of rabbet joint line width W3 of the Fermat line of rabbet joint 602 and archimedean spiral groove line 601 is
0.5mm, the number of turns of archimedean spiral groove line 601 and 603 is 4, and the interval g between electromagnetic bandgap structure unit is 0.5mm.
As shown in Figure 1A, specific preferred embodiment, antenna element 400 is by antenna medium substrates 402, the and of radiation patch 401
Metal floor 403 forms.The length of side L1 of antenna medium substrates 402 is 22.0mm, and thickness H2 is 2mm, dielectric constant 28.Radiation
The length of side L3 of paster 401 is 11.0mm, and radiation patch 401 realizes circular polarisation by corner cut 404.Antenna element 400 is using coaxial
Line is fed, and coaxial inner conductor is welded by the metallization VIA 406 of antenna and the phase of radiation patch 401, coaxial outer conductor and
The phase of metal floor 403 welding of antenna.Antenna element 400 is rotated by 90 ° successively, forms quaternary antenna array.The feedback of antenna element 400
Electric coaxial line sequentially passes through the first table of electromagnetic bandgap structure medium substrate 300 by the square through hole 302 of electromagnetic bandgap structure
Face 100 and second surface 200.Antenna element 400 passes through the manhole 405 of antenna and the manhole of electromagnetic bandgap structure
301, it is fixed on the first surface 100 of electromagnetic bandgap structure medium substrate 300.
Fig. 3 is electro-magnetic bandgap (EBG) structure with Fermat-archimedean spiral groove line and the day without EBG structures
The S21 simulation results of linear array compare.Center of antenna frequency is 1.268GHz, is without being transmitted between the antenna element of EBG structures
Number is -19.2dB, between the antenna element with the double via EBG structures of Fermat-archimedean spiral groove line transmission coefficient for -
19.9dB.As can be seen that the isolation added between the antenna array element after EBG structures improves 0.7dB, therefore EBG structures pair
Mutual coupling has certain inhibitory action between antenna element.
From the invention described above preferred embodiment, it is using advantages of the present invention:By Fermat-archimedean spiral groove line
Double via electromagnetic bandgap structures and antenna connected applications improve isolation between antenna element, effectively suppress inter-element mutual coupling,
Improve antenna performance.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Various corresponding changes and deformation, but these corresponding changes and deformation can be made according to the present invention by knowing those skilled in the art
The protection domain of the claims in the present invention should all be belonged to.
Claims (6)
1. a kind of low-cross coupling antenna array using the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line, its feature exists
In:Including the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line and quaternary circular polarization antenna array, wherein:
The double via electromagnetic bandgap structures of described Fermat-archimedean spiral groove line include metal patch, electromagnetic bandgap structure is situated between
Matter substrate, metal floor, metallization VIA, manhole and square through hole, electromagnetic bandgap structure medium substrate have parallel
First surface and second surface, first surface are the metal patch of periodic arrangement, and second surface is metal floor;
Described quaternary circular polarization antenna array includes radiation patch, antenna medium substrates, metal floor, metallization VIA and circle
Through hole, antenna medium substrates have parallel first surface and second surface, and first surface is radiation patch, and second surface is gold
Possession plate;Four circular polarized antenna units are located at the corner of the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line.
2. the low-cross coupling according to claim 1 using the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Antenna array, it is characterised in that:Electromagnetic bandgap structure unit is bimetallic via structure, and its length-width ratio is 3:1, unit spacing phase
Deng.
3. the low-cross coupling according to claim 1 using the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Antenna array, it is characterised in that:The first surface of electromagnetic bandgap structure medium substrate is the rectangular metal paster edge of periodic arrangement
Long side can be divided into three parts, be designated as the 1st subelement, the 2nd subelement and the 3rd subelement, the 1st subelement and the 3rd subelement successively
There are metallization VIA, and the archimedean spiral groove line with same number of turns and identical rotation direction, archimedean spiral groove line in center
For starting point respectively on the inside of metallization VIA, the Fermat line of rabbet joint is located at the 2nd subelement, and line of rabbet joint both ends are single by the 1st subelement and the 3rd son
The archimedean spiral groove line end of member is connected, archimedean spiral groove line, the Fermat groove of the 2nd subelement of the 1st subelement
Line is connected with three articles of line of rabbet joint of archimedean spiral groove line of the 3rd subelement.
4. the low-cross coupling according to claim 1 using the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Antenna array, it is characterised in that:Described square through hole is located at four angles of electromagnetic bandgap structure medium substrate, each square through hole
Four manholes are placed with around corner.
5. the low-cross coupling according to claim 1 using the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Antenna array, it is characterised in that:Radiation patch is square, and circular polarisation is realized by the diagonal corner cut of paster, using coaxial feeding,
Coaxial inner conductor is mutually welded by metallization VIA with radiation patch, coaxial outer conductor and antenna medium substrates second surface
Metal floor mutually weld, four circular polarized antenna units are located at the double via electro-magnetic bandgap knots of Fermat-archimedean spiral groove line
The corner of structure, and be rotated by 90 ° successively, the feeding coaxial lines of antenna element pass through the square logical of electromagnetic bandgap structure medium substrate
Hole, sequentially pass through electromagnetic bandgap structure medium substrate first surface and second surface.
6. the low-cross coupling according to claim 1 using the double via electromagnetic bandgap structures of Fermat-archimedean spiral groove line
Antenna array, it is characterised in that:There are four manholes circular polarized antenna unit corner, double with Fermat-archimedean spiral groove line
Four manhole diameters around four square through holes of via electromagnetic bandgap structure are identical with pitch of holes, for by circular polarisation
Antenna is fixed on the first surface of electromagnetic bandgap structure medium substrate.
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CN112968261B (en) * | 2021-02-03 | 2022-08-26 | 中国电子科技集团公司第四十三研究所 | Miniaturized high-performance patch bridge |
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