CN104795639B - A kind of antenna array of compact circularly-polarized microstrip antenna and its composition - Google Patents
A kind of antenna array of compact circularly-polarized microstrip antenna and its composition Download PDFInfo
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- CN104795639B CN104795639B CN201510245290.0A CN201510245290A CN104795639B CN 104795639 B CN104795639 B CN 104795639B CN 201510245290 A CN201510245290 A CN 201510245290A CN 104795639 B CN104795639 B CN 104795639B
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Abstract
The present invention is a kind of compact circularly-polarized microstrip antenna and its antenna array, circular polarization microstrip antenna levels dielectric-slab and substrate are identical square, square radiation patch is attached at top dielectric plate upper surface, substrate is attached at layer dielectric plate upper surface, and microstrip feed line is attached at the lower surface of layer dielectric plate.It is air layer between substrate and top dielectric plate.The center of substrate have in length and breadth groove be mutually perpendicular to the cross recess divided equally, the radiation patch four of top layer while it is upper per while have 3~7 grooves, the groove on center line is most deep, and grooves on two sides depth is gradually reduced, the groove on four sides using radiation patch center be symmetrical.This compact circularly-polarized microstrip antenna constitutes antenna array for array element.Each power splitter is connected with each array element feeder line, and multiple array elements are arranged in a straight line at grade, or is arranged as quadrate array at grade.The present invention has more preferable circular polarization characteristics, reduces antenna size, and reduction antenna array array element spacing is 0.6 λ, antenna array compact conformation.
Description
Technical field
The present invention relates to the reception antenna technical field in communication, specially a kind of compact circularly-polarized microstrip antenna and its
Antenna array.
Background technology
Circular polarization microstrip antenna is a kind of patch chip aerial being made up of the metal copper sheet being attached on medium, circularly polarization microstrip
Antenna includes radiation patch, air layer and the bottom feeder line of top layer.Circular polarization microstrip antenna is mainly used in reception antenna, it is desirable to have
Preferable circular polarization characteristics.The depth identical groove of symmetric form is opened on four sides of current circular polarization microstrip antenna radiation patch, with
Extend radiation patch surface current path, reduce antenna size, while antenna array compact conformation is made, it is ensured that the circle of antenna
Polarization characteristic.But, the symmetrically presence of the line of rabbet joint can influence the CURRENT DISTRIBUTION in paster, damage the circular polarization characteristics of antenna.
Circular polarization microstrip antenna array is made up of several microstrip antenna elements.Due to there is coupling between bay, it is
Reduce influence of the coupling to each bay performance, at present, the array element spacing of general microstrip antenna array be that (λ is electric to 0.5 λ
The wavelength of magnetic wave in media as well), micro-strip circular polarization antenna array causes array element spacing all than larger, to be at least because of the interference of its circular polarisation
0.83 λ, is unfavorable for the miniaturization of antenna array.
The content of the invention
The purpose of the present invention is a kind of compact circularly-polarized microstrip antenna of design, its radiation patch four while it is upper per while center line
On groove it is most deep, the depth of groove of both sides is gradually reduced, it is each while upper groove using it is each while center line be symmetrical.Reduce antenna body
Product, antenna structure is compact, and quality is small.
It is another object of the present invention to design the antenna array that a kind of compact circularly-polarized microstrip antenna is constituted, with of the invention tight
The type circular polarization microstrip antenna that gathers is array element, and the mutual spacing of array element is reduced into 0.6 λ or smaller, in favor of the miniaturization of antenna array.
A kind of compact circularly-polarized microstrip antenna that the present invention is designed includes top layer radiation patch, upper strata Jie stacked successively
Scutum, substrate, the microstrip feed line of layer dielectric plate and bottom, top dielectric plate, substrate and layer dielectric plate are that identical is square
Shape, its length of side is S, and radiation patch is also square, and its length of side is s, S=(1.5~2.5) s.Radiation patch is attached at upper strata Jie
Scutum upper surface, substrate is attached at layer dielectric plate upper surface, and microstrip feed line is attached at the lower surface of layer dielectric plate, substrate and
Radiation patch is copper sheet.Top dielectric plate and layer dielectric plate are insulation medium board.Upper surface of base plate and top dielectric plate following table
It is air layer between face.Top layer radiation patch, top dielectric plate, the center of substrate and layer dielectric plate are in same plumb line
On, the centerline on each side is on same vertical guide.There is cross recess at the center of substrate, and the pod and translot of cross recess mutually hang down
Directly divide equally, and be respectively parallel to the adjacent both sides of substrate.The radiation patch four of top layer while it is upper per while have 3~7 rectangular recess, it is recessed
Groove center line is vertical with the side at place, and the groove on each side center line is most deep, the depths of groove of each side center line both sides by
It is decrescence small, it is each while upper groove using it is each while center line be symmetrical.The width W of each groove is identical, each groove while spacing and it is each while
Spacing W ' outside the groove of two ends with radiation patch side is more than W, W '=(1.8~2.2) W.The width W of each groove be 0.1mm~
Depth of groove on 0.3mm, each side center line is L, and L=(0.25~0.35) s, the depth of each side center line grooves on two sides etc. compares
Reduce.Groove on four sides using radiation patch center be symmetrical.
Substrate and the copper sheet that radiation patch is thickness 0.02mm~0.08mm.
Top dielectric plate and the insulation medium board that layer dielectric plate is thickness 0.5mm~2mm.
The thickness of air layer is 3mm~6mm between upper surface of base plate and top dielectric plate lower surface.
The groove width Ws of cross recess is less than width W, W=(1.1~1.5) Ws of each side groove of radiation patch.
The length Ls of cross recess is equal to radiation patch length of side s.
The antenna array that a kind of compact circularly-polarized microstrip antenna that the present invention is designed is constituted, multiple above-mentioned compacts of identical
Circular polarization microstrip antenna is that array element constitutes antenna array, and the isodisperse of power splitter is identical with array number, each port of power splitter and antenna
The feeder line of each array element in battle array is connected one by one, and input constant amplitude is with the signal of phase, and the spacing of array element is 0.5~0.6 λ, and λ is the day
Wavelength of the radio wave of linear array work in the substrate media of array element；2~7 array elements are aligned at grade,
The line at array element center is a straight line, or N × N number of array element is arranged as quadrate array at grade, N for 2 to 8 it is whole
Number.
Compared with prior art, the advantage of a kind of compact circularly-polarized microstrip antenna of the present invention and its antenna array of composition
For：1st, the groove of each side gradual change of radiant body paster, extends chip surface current path, while making radiation patch possess than identical
The more preferable circular polarization characteristics of groove of depth, make circular polarization microstrip antenna array compact conformation, while ensureing narrow beam and antenna
Circular polarization characteristics, reduce antenna size significantly, are 45mm × 45mm by conventional microstrip antenna radiant body patch size, are kept to
30mm × 30mm, reduction 30%；2nd, the cross recess on antenna substrate reduces the coupling of feeder line, reduces the spacing of array element,
By the conventional λ of micro-strip circular polarization antenna array array element spacing 0.83, it is kept to be equal to or less than 0.6 λ, reduces 25%,；So as to ensure
On the premise of the circular polarization characteristics and radiation characteristic of micro-strip circular polarization antenna array, the size of micro-strip circular polarization antenna array is reduced.
Brief description of the drawings
Fig. 1 is this compact circularly-polarized microstrip antenna embodiment schematic top plan view；
Fig. 2 is this compact circularly-polarized microstrip antenna embodiment schematic side view；
Fig. 3 is this compact circularly-polarized microstrip antenna embodiment elevational schematic view；
The structural representation of antenna array embodiment 1 that Fig. 4 is constituted for this compact circularly-polarized microstrip antenna；
The structural representation of antenna array embodiment 2 that Fig. 5 is constituted for this compact circularly-polarized microstrip antenna.In figure marked as：
1st, top dielectric plate, 2, radiation patch, 3, air layer, 4, substrate, 5, layer dielectric plate, 6, microstrip feed line, 7, ten
Word groove.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
Compact circularly-polarized microstrip antenna embodiment
This compact circularly-polarized microstrip antenna embodiment as shown in Figures 1 to 3, includes the radiation patch of the top layer stacked successively
2nd, the microstrip feed line 6 of top dielectric plate 1, substrate 4, layer dielectric plate 5 and bottom, top dielectric plate 1, substrate 4 and layer dielectric
Plate 5 is identical square, and its length of side is S, this example S=60mm.Radiation patch 2 is also square, and its length of side is s, s=
30mm.Top dielectric plate 1 is single-side coated copper plate, and the copper foil etching for the thickness 0.05mm that its upper surface is attached is radiation patch 2, under
Layer dielectric-slab 5 is double face copper, and the copper foil for the thickness 0.05mm that its upper surface is attached is substrate 4, and its center is etched with cross
Groove 7, the pod and translot of cross recess 7 are mutually perpendicular to divide equally, and are respectively parallel to the adjacent both sides of substrate 4.The groove width of cross recess 7
Ws is less than the width W of each side groove of radiation patch 2, and this example W=1.3Ws, the length Ls of cross recess 7 is equal to the length of side of radiation patch 2
s.The copper foil etching for the thickness 0.05mm that the lower surface of layer dielectric plate 5 is attached is microstrip feed line 6.Top dielectric plate 1 and lower floor are situated between
Scutum 5 is thickness d 1=d2=5mm insulation medium board.It is thickness d 2 between the upper surface of substrate 4 and the lower surface of top dielectric plate 1
=4.5mm air layer 3.Top layer radiation patch 2, top dielectric plate 1, the center of substrate 4 and layer dielectric plate 5 are in same lead
On vertical line, the centerline on each side of each layer is on same vertical guide.
The radiation patch 2 four of top layer while it is upper per while have 5 rectangular recess, groove center line is vertical with the side at place, is in
Groove on each side center line is most deep, and the depth of groove of each side center line both sides is gradually reduced, it is each while upper groove with it is each while in
Heart line is symmetrical.The width W of each groove is identical, and the spacing of each groove and each side two ends groove outer side edges and radiation patch 2 are same
The spacing W ' of side is more than W, this example W '=2W.The width W of each groove is that the depth of groove on 0.2mm, each side center line is L1,
L1=10mm, the depth of center line grooves on two sides is kept to L2=7mm, L3=2mm successively.Groove on four sides is with radiation patch
The heart is symmetrical.
The antenna array embodiment 1 that compact circularly-polarized microstrip antenna is constituted
The antenna array embodiment 1 that this compact circularly-polarized microstrip antenna is constituted is as shown in figure 4,3 above-mentioned compact entelechies
It is that array element constitutes collinear array to change microstrip antenna embodiment, and 3 identical power splitters are connected one by one with the feeder line of 3 array element, defeated
Enter signal of the constant amplitude with phase, 3 array elements are aligned at grade, the line at 3 array element centers is a straight line.
This example micro-strip circular polarization antenna array working frequency is 2.4GHz, and the wavelength X in substrate media is 59.55mm, micro-
Space D (spacing of i.e. adjacent radiation patch) with circular polarization antenna array array element is 35mm, D=0.6 λ.
The a width of 200MH of this example micro-strip circular polarization antenna array return loss bandz, as 2.3GHz~2.5GHz, antenna entelechy
Change radiation, axial ratio bandwidth is 70MHz, as 2.35GHz~2.42GHz, 31.5 ° of field angle.
The antenna array embodiment 2 that compact circularly-polarized microstrip antenna is constituted
The antenna array embodiment 2 that this compact circularly-polarized microstrip antenna is constituted is as shown in figure 5,2 × 2 above-mentioned compact circles
Polarization micro-strip antenna embodiment is that array element constitutes quadrate array antenna array, and the feeder line of 4 identical power splitters and 4 array element is one by one
Connection, inputs signal of the constant amplitude with phase, and 4 array elements are arranged in 2 × 2 quadrate array in same plane.
This example micro-strip circular polarization antenna array working frequency is 2.4GHz, and the wavelength X in substrate media is 59.55mm, battle array
The space D of member is 35mm, D=0.6 λ.
Above-described embodiment, is only to the specific of the purpose of the present invention, technical scheme and beneficial effect further description
Individual example, the present invention is not limited to this.All any modifications made within the scope of disclosure of the invention, equivalent substitution, change
Enter, be all contained within protection scope of the present invention.
Claims (7)
1. a kind of compact circularly-polarized microstrip antenna, including the radiation patch (2) of the top layer stacked successively, top dielectric plate (1),
The microstrip feed line (6) of substrate (4), layer dielectric plate (5) and bottom, top dielectric plate (1), substrate (4) and layer dielectric plate (5)
For identical square, its length of side is S, and radiation patch (2) is also square, and its length of side is s, S=(1.5~2.5) s；Radiation
Paster (2) is attached at top dielectric plate (1) upper surface, and substrate (4) is attached at layer dielectric plate (5) upper surface, microstrip feed line (6)
The lower surface of layer dielectric plate (5) is attached at, substrate (4) and radiation patch (2) are copper sheet；Top dielectric plate (1) and lower floor are situated between
Scutum (4) is insulation medium board；It is air layer (3) between substrate (4) upper surface and top dielectric plate (1) lower surface；Radiation patch
Piece (2), top dielectric plate (1), the center of substrate (4) and layer dielectric plate (5) are on same plumb line, the center on each side
Line is on same vertical guide；It is characterized in that：
There is cross recess (7) at the center of the substrate (4), and the pod and translot of cross recess (7) are mutually perpendicular to divide equally, and parallel respectively
It is equal to radiation patch (2) length of side s in the length Ls of cross recess (7) on the adjacent both sides of substrate (4), the substrate (4)；The spoke
Penetrate paster (2) four while it is upper per while have 3~7 rectangular recess, groove center line is vertical with the side of place radiation patch (2), is in
Groove on each side center line is most deep, and (2) four depth of groove in Shang Ge on center line of radiation patch is L, L=
(0.25~0.35) s, the depth of groove of each side center line both sides etc. than reducing, it is each while upper groove using it is each while center line as pair
Claim, the groove on four sides using radiation patch (2) center be symmetrical；The width W phases of each groove on the side of radiation patch (2) four
Together, each groove while spacing and it is each while two ends grooves outside with the spacing W ' on radiation patch (2) side be more than W, W '=(1.8~
2.2)W。
2. compact circularly-polarized microstrip antenna according to claim 1, it is characterised in that：
The width W of each groove is 0.1mm~0.3mm on the side of radiation patch (2) four.
3. compact circularly-polarized microstrip antenna according to claim 1, it is characterised in that：
The substrate (4) and the copper sheet that radiation patch (2) is thickness 0.02mm~0.08mm.
4. compact circularly-polarized microstrip antenna according to claim 1, it is characterised in that：
The top dielectric plate (1) and the insulation medium board that layer dielectric plate (5) is thickness 0.5mm~2mm.
5. compact circularly-polarized microstrip antenna according to claim 1, it is characterised in that：
The thickness of air layer (3) is 3mm~6mm between the lower surface of substrate (4) upper surface and top dielectric plate (5).
6. compact circularly-polarized microstrip antenna according to claim 2, it is characterised in that：
The groove width Ws of cross recess (7) on the substrate (4) be less than each side groove of radiation patch (2) width W, W=(1.1~
1.5)Ws。
7. the antenna array that compact circularly-polarized microstrip antenna according to any one of claim 1 to 6 is constituted, its feature exists
In：
Multiple above-mentioned compact circularly-polarized microstrip antennas of identical are that array element constitutes antenna array, the identical work(of quantity identical with array element
Point device is connected one by one with the feeder line of each array element in antenna array, inputs signal of the constant amplitude with phase, adjacent array element substrate (4) it
Between distance be 3mm~10mm；2~7 array elements are aligned at grade, array element center line in line,
Or N × N number of array element is arranged as quadrate array at grade, N is 2 to 8 integer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106450674A (en) * | 2016-08-24 | 2017-02-22 | 重庆大学 | Antenna array, communication device and terminal equipment |
| CN106252902B (en) * | 2016-09-28 | 2023-03-24 | 广东工业大学 | Compact broadband end-fire array antenna |
| CN106532248B (en) * | 2016-12-09 | 2023-03-31 | 桂林电子科技大学 | Ultra-compact microstrip patch array antenna |
| CN107978868B (en) * | 2017-12-14 | 2023-12-01 | 南京航空航天大学 | Ultra-wideband gradual change gap circularly polarized microstrip antenna |
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