CN105762508B - A kind of broadband dual polarization mobile base station antenna unit of metal-loaded column - Google Patents
A kind of broadband dual polarization mobile base station antenna unit of metal-loaded column Download PDFInfo
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- CN105762508B CN105762508B CN201610169331.7A CN201610169331A CN105762508B CN 105762508 B CN105762508 B CN 105762508B CN 201610169331 A CN201610169331 A CN 201610169331A CN 105762508 B CN105762508 B CN 105762508B
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 title claims abstract description 32
- 230000010287 polarization Effects 0.000 title claims abstract description 20
- 230000009977 dual effect Effects 0.000 title claims abstract description 18
- 239000000523 sample Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000005388 cross polarization Methods 0.000 abstract description 4
- 238000010295 mobile communication Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 241000255777 Lepidoptera Species 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
Abstract
The present invention relates to a kind of broadband dual polarization mobile base station antenna units of metal-loaded column, belong to antenna of mobile communication base station design and manufacturing technology field.The antenna element includes feed structure, dielectric-slab, butterfly irradiation structure, short metal column, coaxial line, plastic support post and metallic reflection plate successively from top to bottom；The feed structure and butterfly irradiation structure are located at dielectric-slab upper and lower surface by same placing direction, and the short metal column is attached on butterfly irradiation structure, and above-mentioned part is fixed on by four plastic support posts in metallic reflection plate；The coaxial line passes through metallic reflection plate, inner core to be connected with feed structure, and outer core is connected with butterfly irradiation structure.The antenna element has the characteristics that broadband, high-isolation, low-cross polarization, compact-sized and inexpensive, meets the development trend of current base station antenna, has preferable practical value.
Description
Technical field
The invention belongs to antenna of mobile communication base station design and manufacturing technology fields, are related to a kind of wideband of metal-loaded column
Band dual polarization mobile base station antenna unit.
Background technology
Core of the antenna for base station as mobile base station, it is established that the nothing in base station and coverage between each movement station
Line electrical transmission lines, the quality of performance directly affect the quality of entire communication system.Dual polarized antenna is as a kind of novel
Antenna, principle are that the mutually orthogonal antenna of two secondary polarization directions is worked at the same time in transmission duplex pattern, are effective against multipath
Decline increases capacity of communication system, reduces antenna and installs number, is widely used in the design of antenna for base station.To solve to work as
The present situation of preceding Multi net voting, multi-operator co-sited and antenna for base station covering of the fan position anxiety, antenna of mobile communication base station is towards multifrequency
The directions such as change/wideband, miniaturization are developed.
Currently, the way of realization of dual polarized antenna can be roughly divided into three classes：Double-fed micro-strip paster antenna, doublet antenna
And complimentary antennas.Double-fed micro-strip paster antenna has the advantages that section is low, simple in structure, but narrower bandwidth, is unfavorable for multiband
Covering；Doublet antenna radiance is good, and processing is simple, but compared with micro-strip paster antenna for, size is larger.Complementary day
Electric dipole is combined by line with magnetic dipole, can realize wider frequency band, and stable increasing can be obtained in entire working frequency range
Benefit and directional diagram.But its metal structure causes the inevitable size of antenna big, quality weight.In practical applications, dual polarization day
First choice of the line as antenna for base station will take into account the characteristics such as its bandwidth, isolation, cross polarization, gain simultaneously, still remain very big
Difficulty.In addition, the small size of antenna for base station, low cost are also the active demand of the marketization.
Invention content
In view of this, the purpose of the present invention is to provide a kind of broadband dual polarization mobile base station antennas of metal-loaded column
Unit can realize dual polarized antenna broadband, high-isolation, low-cross polarization and the performance of miniaturization, be provided simultaneously with low
The market competitiveness of cost.
In order to achieve the above objectives, the present invention provides the following technical solutions：
A kind of broadband dual polarization mobile base station antenna unit of metal-loaded column, the antenna element wrap successively from top to bottom
Include feed structure, dielectric-slab, butterfly irradiation structure, short metal column, coaxial line, plastic support post and metallic reflection plate；
The feed structure and butterfly irradiation structure are located at dielectric-slab upper and lower surface by same placing direction, described short
Metal column is attached on butterfly irradiation structure, and above-mentioned part is fixed on by four plastic support posts in metallic reflection plate；It is described
Coaxial line passes through metallic reflection plate, inner core to be connected with feed structure, and outer core is connected with butterfly irradiation structure.
Further, the feed structure includes+45 ° of T-shape microstrip lines and -45 ° of T-shape microstrip lines, and two microstrip lines are handed over
Mistake is vertically positioned at dielectric-slab upper layer center, is connected directly respectively with two coaxial line inner cores.
Further, -45 ° of T-shapes microstrip line with+45 ° of T-shape microstrip lines in order to avoid spatially overlapping, therefore divides
For three or five microstrip line one, probe one, microstrip line two, probe two, microstrip line parts；The microstrip line one, microstrip line three overlay on
Dielectric-slab upper layer, it is coplanar with+45 ° of T-shape microstrip lines；Probe one and probe two are non-metallic by two be provided on dielectric-slab
Through-hole will be connect with microstrip line one, microstrip line three respectively positioned at two both ends of microstrip line of 1mm below dielectric-slab.
Further, the dielectric-slab uses FR4 planks, thickness 0.5mm to be opened thereon there are four non-metallic through-hole, two
Two is identical, wherein two is used in the feed structure middle probe one and probe two, other two are the connection feedback of coaxial line inner core
Used in electric structure.
Further, the butterfly irradiation structure includes+45 ° of butterfly radiating doublets and -45 ° of butterfly radiating doublets, two butterflies
Radiating doublet serrated vertical is located at dielectric-slab lower layer center, respectively with+45 ° of T-shape microstrip lines and -45 ° of T-shape microstrip lines
It puts at same direction；Each butterfly radiating doublet includes two class sector paster vibrator arms, along Jie in the form of centrosymmetric
Scutum lower surface diagonal positions are put.
Further, the class sector paster vibrator arm includes a semicircle paster and an isosceles trapezoid patch, semicircle
The sum of radius and the height of isosceles trapezoid value range are in 27mm~40mm.
Further, all carved on the class sector paster vibrator arm there are one similar U-typed slot, this similar to U-typed slot be by
The circular sliding slopes of U-typed structural base become the connection that is in line, and recess is directed toward dielectric-slab center.
Further, five identical short metal columns are attached under each class sector paster vibrator arm, according to " 1
One " be positioned around around U-typed slot is put, and short metal column is cylinder here, using copper material.
Further, four plastic support posts are cylinder, are located at below four apex angles of dielectric-slab, height
(i.e. height of the dielectric-slab apart from metallic reflection plate) unanimously, value range is in 32mm~38mm.
Further, the metallic reflection plate is rectangular planar structure, and centre opens that there are two non-metallic through-holes, so as to coaxial
Line feeds antenna across metallic reflection plate, can take the metal materials such as copper, aluminum.
The beneficial effects of the present invention are：
1) the antenna medium plate uses FR4 planks, and thickness 0.5mm, feed structure and butterfly irradiation structure are all made of
Plane patch form makes antenna compact overall structure, and processing is simple, reduces manufacturing cost.
2) intersect the butterfly oscillator placed by using two right ± 45 ° of orthogonal T-shape microstrip lines to couple, coaxial line
The mode of directly excitation is fed, and the dual polarised radiation of antenna is realized.Meanwhile when a polarization job, another pole
Change representative butterfly oscillator and be equivalent to parasitic patch, is conducive to antenna and obtains wide band characteristic.
3) " T " microstrip line is that space coincidence, the air bridges form of use is avoided to effectively increase day in the feed structure
The isolation of line, while the complexity that traditional base station antenna uses multilayer stack structure is reduced, simplify antenna structure.
4) the class sector knot that the T-shape structure and the butterfly irradiation structure that microstrip line uses in the feed structure use
Structure contributes to the expansion of the beamwidth of antenna.
5) since each class sector paster vibrator arm is carved with similar U-typed slot, chip surface current path is changed, it can
To be effectively improved the impedance matching of antenna, by rationally adjusting the parameter of similar U-typed slot, the impedance of antenna can be made to change,
Make antenna impedance matching at required frequency point.
6) short metal column of the load under butterfly irradiation structure, is equivalent to the introducing of reactance element, can not only improve day
The impedance matching of line can also adjust the centre frequency of antenna by changing metal column height and quantity.
Description of the drawings
In order to keep the purpose of the present invention, technical solution and advantageous effect clearer, the present invention provides following attached drawing and carries out
Explanation：
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the feed structure schematic diagram of the present invention；
Fig. 3 is the butterfly irradiation structure schematic diagram of the present invention；
Fig. 4 is ± 45 ° of polarized voltage standing wave ratioes (VSWR) and gain (Gain) curve graph in the embodiment of the present invention；
Fig. 5 is ± 45 ° of polarization separations in the embodiment of the present invention from degree (S21) curve graph；
Fig. 6 is+45 ° of horizontal radiation patterns for being polarized in 1.7GHz, 2.2GHz, 2.7GHz in the embodiment of the present invention；
Wherein：1 is feed structure, and 2 be dielectric-slab, and 3 be butterfly irradiation structure, and 4 be short metal column, and 5 be coaxial line, and 6 are
Plastic support post, 7 be metallic reflection plate, and 11 be microstrip line one, and 12 be probe one, and 13 be microstrip line two, and 14 be probe two, and 15 are
Microstrip line three, 31,32,33,34 is class sector paster vibrator arm respectively, and 311,321,331,341 be each class sector patch respectively
Similar U-typed slot in piece oscillator arms, 332,342 be the circular hole for being opened in class sector paster vibrator arm 33,34 respectively.
Specific implementation mode
Below in conjunction with attached drawing, the preferred embodiment of the present invention is described in detail.
Fig. 1 is the overall structure diagram of the present invention, as shown in Figure 1, a kind of width of metal-loaded column provided by the invention
Frequency band dual polarization mobile base station antenna unit, including feed structure 1 successively from top to bottom, dielectric-slab 2, butterfly irradiation structure 3,
Short metal column 4, coaxial line 5, plastic support post 6, metallic reflection plate 7.The feed structure 1 includes two mutually orthogonal " T "
Type microstrip line, the butterfly irradiation structure 3 include two secondary ± 45 ° of butterfly oscillators for intersecting placement, the feed structure 1 and butterfly
Irradiation structure 3 is located at 2 upper and lower surface of dielectric-slab by same placing direction, and 2 dielectric constant of dielectric-slab is 4.4, and thickness is
0.5mm, loss tangent angle are 0.02, and plan view shape is opened in the rectangle that the length of side is 58mm, centre there are four non-metallic through-hole, two
Two is identical.Wherein, two are used in 1 middle probe 1 of feed structure and probe 2 12, other two is that 5 inner core of coaxial line connects
Used in feed structure 1.The feed structure 1 includes two mutually orthogonal T-shape microstrip lines, and the butterfly irradiation structure 3 wraps
Two secondary ± 45 ° of butterfly oscillators for intersecting placement are included, the short metal column 4 is cylinder, is attached under butterfly irradiation structure 3, often
Five identical short metal columns 4 are one group, are put according to being positioned around around similar U-typed slot for " one three one ", here short gold
Belong to column 4 and uses copper material.The height of short metal column 4 is 5mm, radius 1.5mm.Above-mentioned part relies on four plastic support posts
6 are fixed in metallic reflection plate 7.The plastic support post 6 is cylinder, is highly 36mm.Metallic reflection plate 7 be 180mm ×
180mm rectangular planar structures, centre are opened there are two non-metallic through-hole, and the metal materials such as copper, aluminum can be taken.Described two
Coaxial line 5 all uses characteristic impedance for 50 ohm of coaxial line, and the through-hole in metallic reflection plate 7, lower end is passed through to connect feed, on
Hold two non-metallic through-holes that its inner core is then passed through on dielectric-slab 2 respectively with two T-shape microstrip line phases in feed structure 1
Even, outer core is connected with corresponding butterfly irradiation structure 3.
Fig. 2 is the feed structure schematic diagram of the present invention, as shown in Fig. 2, the feed structure 1 includes+45 ° of T-shape micro-strips
Line and orthogonal -45 ° of T-shape microstrip lines, all micro belt line widths are 1.69mm.Wherein, -45 ° of T-shapes microstrip line
In order to avoid spatially being overlapped with+45 ° of T-shape microstrip lines, therefore it is divided into microstrip line 1, probe 1, microstrip line 2 13 is visited
Needle 2 14, microstrip line 3 15.The microstrip line 1, microstrip line 3 15 overlay on dielectric-slab upper layer, total with+45 ° of T-shape microstrip lines
Face.Probe 1 and probe 2 14, will be positioned at the micro- of 2 lower section 1mm of dielectric-slab by two non-metallic through-holes on dielectric-slab 2
2 13 both ends of band line are connect with microstrip line 1, microstrip line 3 15 respectively.
As shown in figure 3, the butterfly irradiation structure 3 includes two mutually orthogonal ± 45 ° butterfly oscillators, each butterfly spoke
It includes two class sector paster vibrator arms to penetrate oscillator.Class sector paster vibrator arm 31,33 forms+45 ° of polarization, and class sector patch shakes
Sub- arm 32,34 forms -45 ° of polarization.The class sector paster vibrator arm 31 includes a semicircular patch and an isosceles trapezoid
Patch, it is 15.8mm, a height of 12.5mm of isosceles trapezoid to take semicircular radius here.In addition, class sector paster vibrator arm 31
Upper quarter, there are one similar U-typed slots 311, this is that the circular sliding slopes change of U-typed structural base is in line similar to U-typed slot 311
Connection, recess are directed toward 2 center of dielectric-slab, and groove width 3mm, similar to the 311 a length of 20mm in bottom of U-typed slot, alice is a length of
14.7mm.Dash area is the placement position that five short metal columns 4 surround similar U-typed slot " one three one " form in Fig. 3.Class is fanned
Shape paster vibrator arm 32,33,34 is identical as class sector paster vibrator arm 31, similar U-typed slot 321,331,341 and similar " U "
Type groove 311 is identical.In addition, also respectively being opened on class sector paster vibrator arm 33,34, there are one circular hole 332,342, size and locations
The through-hole passed through for 5 inner core of coaxial line with two in dielectric-slab 2 is consistent.Class sector paster vibrator arm 33,34 is at circular hole with two
The outer core of root coaxial line is connected directly.
It, can be with as shown in figure 4, for ± 45 ° of polarized voltage standing wave ratioes (VSWR) of the invention and gain (Gain) measured drawing
It draws a conclusion：± 45 ° are polarized in VSWR in 1.6GHz-2.8GHz wide frequency ranges<2, current 2G/3G/4 mobile communication can be covered
Frequency range, and in this frequency range gain average value in 8.2dBi.
As shown in figure 5, being ± 45 ° of polarization separations of the invention from degree (S21) measured drawing, it can be seen that in entire work frequency
Isolation is more than 30dB between polarising in section.
As shown in fig. 6, the horizontal plane for being polarized in 1.7GHz, 2.2GHz, 2.7GHz actual measurement for+45 ° in the embodiment of the present invention
Directional diagram；It can be seen that the present invention has stable directionality, 3dB lobe widths meet current " three within the scope of 65 ° ± 5 °
Location requirement is built in the base station of sector ", and cross polarization ratio is less than -25dB.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (6)
1. a kind of broadband dual polarization mobile base station antenna unit of metal-loaded column, it is characterised in that：The antenna element is from upper
Include feed structure, dielectric-slab, butterfly irradiation structure, short metal column, coaxial line, plastic support post and metallic reflection successively down
Plate；
The feed structure and butterfly irradiation structure are located at dielectric-slab upper and lower surface, the short metal by same placing direction
Column is attached on butterfly irradiation structure, and above-mentioned part is fixed on by four plastic support posts in metallic reflection plate；It is described coaxial
Line passes through metallic reflection plate, inner core to be connected with feed structure, and outer core is connected with butterfly irradiation structure；
The feed structure includes+45 ° of T-shape microstrip lines and -45 ° of T-shape microstrip lines, and two microstrip line serrated verticals, which are located at, to be situated between
Scutum upper layer center is connected directly with two coaxial line inner cores respectively；
- 45 ° of T-shapes microstrip line in order to avoid spatially being overlapped with+45 ° of T-shape microstrip lines, therefore be divided into microstrip line one,
Three or five probe one, microstrip line two, probe two, microstrip line parts；The microstrip line one, microstrip line three overlay on dielectric-slab upper layer,
It is coplanar with+45 ° of T-shape microstrip lines；Probe one and probe two will be located at by two non-metallic through-holes being provided on dielectric-slab
Two both ends of microstrip line of 1mm are connect with microstrip line one, microstrip line three respectively below dielectric-slab；
The dielectric-slab uses FR4 planks, thickness 0.5mm to be opened thereon there are four non-metallic through-hole, identical two-by-two, wherein
Two is used in the feed structure middle probe one and probe two, other two are connected for coaxial line inner core used in feed structure；
The butterfly irradiation structure includes+45 ° of butterfly radiating doublets and -45 ° of butterfly radiating doublets, and two butterfly radiating doublets interlock
It is vertically positioned at dielectric-slab lower layer center, is put at same direction with+45 ° of T-shape microstrip lines and -45 ° of T-shape microstrip lines respectively
It puts；Each butterfly radiating doublet includes two class sector paster vibrator arms, along dielectric-slab lower surface pair in the form of centrosymmetric
Diagonal position is put.
2. a kind of broadband dual polarization mobile base station antenna unit of metal-loaded column according to claim 1, feature
It is：The class sector paster vibrator arm includes a semicircle paster and an isosceles trapezoid patch, the radius and isosceles of semicircle
The sum of trapezoidal high value range is in 27mm~40mm.
3. a kind of broadband dual polarization mobile base station antenna unit of metal-loaded column according to claim 1, feature
It is：It is all carved there are one similar U-typed slot on the class sector paster vibrator arm, this is by class sector patch similar to U-typed slot
The circular sliding slopes of oscillator arms bottom become the connection that is in line, and recess is directed toward dielectric-slab center.
4. a kind of broadband dual polarization mobile base station antenna unit of metal-loaded column according to claim 3, feature
It is：Five identical short metal columns are attached under each class sector paster vibrator arm, according to the position of " one three one "
It is put around similar U-typed slot, short metal column is cylinder here, using copper material.
5. a kind of broadband dual polarization mobile base station antenna unit of metal-loaded column according to claim 1, feature
It is：Four plastic support posts are cylinder, are located at below four apex angles of dielectric-slab, highly consistent, height
Height for dielectric-slab apart from metallic reflection plate, value range is in 32mm~38mm.
6. a kind of broadband dual polarization mobile base station antenna unit of metal-loaded column according to claim 1, feature
It is：The metallic reflection plate is rectangular planar structure, and centre opens that there are two non-metallic through-holes, and metallic reflection plate is taken copper
Or aluminum metal material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610169331.7A CN105762508B (en) | 2016-03-23 | 2016-03-23 | A kind of broadband dual polarization mobile base station antenna unit of metal-loaded column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610169331.7A CN105762508B (en) | 2016-03-23 | 2016-03-23 | A kind of broadband dual polarization mobile base station antenna unit of metal-loaded column |
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| CN105762508A CN105762508A (en) | 2016-07-13 |
| CN105762508B true CN105762508B (en) | 2018-08-31 |
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| CN105098342A (en) * | 2015-08-20 | 2015-11-25 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Dual-layer patch dual-frequency disc microstrip antenna |
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2016
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| CN202178385U (en) * | 2011-07-15 | 2012-03-28 | 华南理工大学 | Double-frequency dual polarized antenna capable of being used for GPS and TD-SCDMA |
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| CN105762508A (en) | 2016-07-13 |
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