CN105762508A - Broadband dual-polarized mobile base station antenna unit equipped with metallic pillars - Google Patents
Broadband dual-polarized mobile base station antenna unit equipped with metallic pillars Download PDFInfo
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- CN105762508A CN105762508A CN201610169331.7A CN201610169331A CN105762508A CN 105762508 A CN105762508 A CN 105762508A CN 201610169331 A CN201610169331 A CN 201610169331A CN 105762508 A CN105762508 A CN 105762508A
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- antenna unit
- slab
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- 229910052751 metal Inorganic materials 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 33
- 230000010287 polarization Effects 0.000 claims description 23
- 230000009977 dual effect Effects 0.000 claims description 20
- 239000000523 sample Substances 0.000 claims description 20
- 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
- 239000000463 material Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 8
- 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
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000001105 regulatory 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 invention relates to a broadband dual-polarized mobile base station antenna unit equipped with metallic pillars and belongs to the technical field of mobile communication base station design and manufacture. The antenna unit successively comprises, from top to bottom, a feed structure, a dielectric slab, a butterfly-shaped radiation structure, short metallic pillars, a coaxial line, plastic support column, and a metallic reflecting plate. The feed structure and the butterfly-shaped radiation structure are arranged on the upper surface and the lower surface of the dielectric slab in the same placed direction, respectively. The short metallic pillars cling to the butterfly-shaped radiation structure. The butterfly-shaped radiation structure is fixed to the metallic reflecting plate through the four plastic support columns. The coaxial line passes through the metallic reflecting plate. The inner core of the coaxial line is connected with the feed structure and the outer core of the coaxial line is connected with the butterfly-shaped radiation structure. The antenna unit has characteristics of a broad band, high isolation, low cross polarization, compact structure, and low cost, complies with the development tendency of current base station antennas, and has good practical value.
Description
Technical field
The invention belongs to antenna of mobile communication base station design and manufacturing technology field, relate to the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post.
Background technology
Antenna for base station is as the core of mobile base station, it is established that base station and wireless radio transmission circuit between each movement station in coverage, the quality of its performance directly affects the quality of whole communication system.Dual polarized antenna is as a kind of new antenna, its principle is that the mutually orthogonal antenna of two secondary polarised directions simultaneously works in transmission duplex pattern, is effective against multipath fading, increases capacity of communication system, reduce antenna and number is installed, be widely used in the design of antenna for base station.The present situation nervous for solving current Multi net voting, multi-operator co-sited and antenna for base station covering of the fan position, antenna of mobile communication base station develops towards multifrequency/direction such as wideband, miniaturization.
At present, 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 that section is low, the advantage of simple in construction, but narrower bandwidth, it is unfavorable for the covering of multiband；Doublet antenna radiance is good, and processing is simple, but relatively micro-strip paster antenna, larger in size.Electric dipole is combined by complimentary antennas with magnetic dipole, it is possible to realize wider frequency band, can obtain stable gain and directional diagram at whole working frequency range.But its metal structure causes that the inevitable size of antenna is big, quality weight.In actual applications, dual polarized antenna, as the first-selection of antenna for base station, will be taken into account the characteristics such as its bandwidth, isolation, cross polarization, gain simultaneously, still there is very big difficulty.Additionally, the small size of antenna for base station, low cost are also the urgent needss of the marketization.
Summary of the invention
In view of this, it is an object of the invention to provide the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post, it is capable of the performance of dual polarized antenna broadband, high-isolation, low-cross polarization and miniaturization, is provided simultaneously with the market competitiveness of low cost.
For reaching above-mentioned purpose, the present invention provides following technical scheme:
The broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post, this antenna element includes feed structure, dielectric-slab, butterfly irradiation structure, short metal column, coaxial line, plastic support post and metallic reflection plate from top to bottom successively；
Described feed structure and butterfly irradiation structure lay respectively at dielectric-slab upper and lower surface by same placing direction, and described short metal column is attached on butterfly irradiation structure, and above-mentioned part relies on four plastic support post to be fixed on metallic reflection plate；Described coaxial line is through metallic reflection plate, and its inner core is connected with feed structure, and outer core is connected with butterfly irradiation structure.
Further, described feed structure includes+45 ° of T-shape microstrip lines and-45 ° of T-shape microstrip lines, and two microstrip line serrated vertical are positioned at center, dielectric-slab upper strata, are joined directly together with two coaxial line inner cores respectively.
Further, described-45 ° of T-shape microstrip lines are in order to avoid spatially overlapping with+45 ° of T-shape microstrip lines, therefore are divided into microstrip line one, probe one, microstrip line two, probe two, three or five parts of microstrip line；Described microstrip line one, microstrip line three overlays on dielectric-slab upper strata, coplanar with+45 ° of T-shape microstrip lines；Probe one and probe two, by two the non-metallic through holes having on dielectric-slab, will be located in microstrip line two two ends of 1mm below dielectric-slab and be connected with microstrip line one, microstrip line three respectively.
Further, described dielectric-slab adopt FR4 sheet material, thickness is 0.5mm, and it has four non-metallic through holes, identical between two, wherein, two for described feed structure middle probe one and probe two used by, two other for coaxial line inner core connection feed structure used by.
Further, described butterfly irradiation structure includes+45 ° of butterfly radiating doublets and-45 ° of butterfly radiating doublets, two butterfly radiating doublet serrated vertical are positioned at dielectric-slab lower floor center, put at same direction with+45 ° of T-shape microstrip lines and-45 ° of T-shape microstrip lines respectively；Each butterfly radiating doublet includes two class sector paster vibrator arms, puts along dielectric-slab lower surface diagonal positions with centrosymmetric form.
Further, described class sector paster vibrator arm includes a semicircle paster and an isosceles trapezoid paster, and the radius of semicircle and the high sum span of isosceles trapezoid are at 27mm～40mm.
Further, described class sector paster vibrator arm being all carved with similar " U " type groove, this similar " U " type groove is the circular sliding slopes of " U " type structural base to become straight line connect, and its recess points to dielectric-slab center.
Further, being attached to five identical short metal columns under described each class sector paster vibrator arm, be positioned around around " U " type groove to put according to " one three one ", short metal column is cylinder here, adopts copper material.
Further, described four plastic support post are cylinder, lay respectively at below four drift angles of dielectric-slab, and its height (i.e. the height of dielectric-slab distance metallic reflection plate) is consistent, and span is at 32mm～38mm.
Further, described metallic reflection plate is rectangular planar structure, and centre has two non-metallic through holes, in order to antenna is fed by coaxial line through metallic reflection plate, can take the metal materials such as copper, aluminum matter.
The beneficial effects of the present invention is:
1) this antenna medium plate adopts FR4 sheet material, and thickness is 0.5mm, and its feed structure and butterfly irradiation structure all adopt plane patch form, makes antenna compact overall structure, and processing is simple, reduces manufacturing cost.
2) by adopt two orthogonal T-shape microstrip lines right ± 45 ° intersect the butterfly oscillator placed and couple, the mode that coaxial line directly encourages feeds, it is achieved that the dual polarised radiation of antenna.Meanwhile, when a polarization job, another butterfly oscillator representated by polarization is equivalent to parasitic patch, is conducive to antenna to obtain wide band characteristic.
3) in described feed structure " T " microstrip line for avoiding space coincidence, the air bridges form of employing, be effectively increased the isolation of antenna, reduce traditional base station antenna simultaneously and adopt the complexity of multi-laminate structure, simplify antenna structure.
4) in described feed structure microstrip line adopt T-shape structure and described butterfly irradiation structure adopt class sector structure, contribute to the expansion of the beamwidth of antenna.
5) owing to each class sector paster vibrator arm is carved with similar " U " type groove, change chip surface current path, it is possible to be effectively improved the impedance matching of antenna, by the parameter of reasonable adjusting similar " U " type groove, the impedance that can make antenna changes, and makes antenna at required frequency place impedance matching.
6) it is carried in the short metal column under butterfly irradiation structure, is equivalent to the introducing of reactance element, the impedance matching of antenna can not only be improved, it is also possible to regulated the mid frequency of antenna by change metal column height and quantity.
Accompanying drawing explanation
In order to make the purpose of the present invention, technical scheme and beneficial effect clearly, the present invention provides drawings described below to illustrate:
Fig. 1 is the overall structure schematic 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 in the embodiment of the present invention ± voltage standing wave ratioes (VSWR) of 45 ° of polarization and gain (Gain) curve chart；
Fig. 5 is in the embodiment of the present invention ± 45 ° of polarization separation are from degree (S21) curve chart；
Fig. 6 is+45 ° of horizontal radiation patterns being polarized in 1.7GHz, 2.2GHz, 2.7GHz in the embodiment of the present invention；
Wherein: 1 is feed structure, 2 is dielectric-slab, and 3 is butterfly irradiation structure, 4 is short metal column, and 5 is coaxial line, and 6 is plastic support post, 7 is metallic reflection plate, and 11 is microstrip line one, and 12 is probe one, 13 is microstrip line two, and 14 is probe two, and 15 is microstrip line three, 31,32,33,34 is class sector paster vibrator arm respectively, 311,321,331,341 is similar " U " the type groove on each class sector paster vibrator arm respectively, and 332,342 is the circular hole being opened in class sector paster vibrator arm 33,34 respectively.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Fig. 1 is the overall structure schematic diagram of the present invention, as shown in Figure 1, the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post provided by the invention, 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.Described feed structure 1 includes two mutually orthogonal T-shape microstrip lines, described butterfly irradiation structure 3 includes the butterfly oscillator that two pairs ± 45 ° of intersections are placed, described feed structure 1 and butterfly irradiation structure 3 lay respectively at dielectric-slab 2 upper and lower surface by same placing direction, dielectric-slab 2 dielectric constant is 4.4, thickness is 0.5mm, and loss tangent angle is 0.02, and plan view shape is the length of side is the rectangle of 58mm, centre has four non-metallic through holes, identical between two.Wherein, two used by feed structure 1 middle probe 1 and probe 2 12, two other connects used by feed structure 1 for coaxial line 5 inner core.Described feed structure 1 includes two mutually orthogonal T-shape microstrip lines, described butterfly irradiation structure 3 includes the butterfly oscillator that two pairs ± 45 ° of intersections are placed, described short metal column 4 is cylinder, it is attached to butterfly irradiation structure 3 times, every five identical short metal columns 4 are one group, being positioned around around similar " U " type groove to put according to " one three one ", short metal column 4 adopts copper material here.The height of short metal column 4 is 5mm, and radius is 1.5mm.Above-mentioned part relies on four plastic support post 6 to be fixed on metallic reflection plate 7.Described plastic support post 6 is cylinder, is highly 36mm.Metallic reflection plate 7 is 180mm × 180mm rectangular planar structure, and centre has two non-metallic through holes, can take the metal materials such as copper, aluminum matter.The coaxial line that described two coaxial lines 5 all adopt characteristic impedance to be 50 ohm, through hole on metallic reflection plate 7, lower end connects feed, its inner core of upper end is then passed through two non-metallic through holes on dielectric-slab 2 and is connected with two T-shape microstrip lines in feed structure 1 respectively, and outer core is connected with corresponding butterfly irradiation structure 3.
Fig. 2 is the feed structure schematic diagram of the present invention, as in figure 2 it is shown, described feed structure 1 includes+45 ° of T-shape microstrip lines and orthogonal-45 ° of T-shape microstrip lines, all micro belt line widths are 1.69mm.Wherein, described-45 ° of T-shape microstrip lines are in order to avoid spatially overlapping with+45 ° of T-shape microstrip lines, therefore are divided into microstrip line 1, probe 1, microstrip line 2 13, probe 2 14, microstrip line 3 15.Described microstrip line 1, microstrip line 3 15 overlays on dielectric-slab upper strata, coplanar with+45 ° of T-shape microstrip lines.Probe 1 and probe 2 14, by two non-metallic through holes on dielectric-slab 2, will be located in microstrip line 2 13 two ends of 1mm below dielectric-slab 2 and be connected with microstrip line 1, microstrip line 3 15 respectively.
As it is shown on figure 3, described butterfly irradiation structure 3 includes two mutually orthogonal ± 45 ° of butterfly oscillators, each butterfly radiating doublet includes two class sector paster vibrator arms.Class sector paster vibrator arm 31,33 forms+45 ° of polarization, and class sector paster vibrator arm 32,34 forms-45 ° of polarization.Described class sector paster vibrator arm 31 includes a semicircular patch and an isosceles trapezoid paster, and taking semicircular radius here is 15.8mm, and the height of isosceles trapezoid is 12.5mm.In addition, class sector paster vibrator arm 31 is carved with similar " U " type groove 311, this similar " U " type groove 311 is the circular sliding slopes of " U " type structural base to become straight line connect, its recess points to dielectric-slab 2 center, its groove width 3mm, long bottom similar " U " type groove 311 is 20mm, and alice length is 14.7mm.In Fig. 3, dash area is five short metal columns 4 putting positions around similar " U " type groove " one three one " form.Class sector paster vibrator arm 32,33,34 is identical with class sector paster vibrator arm 31, and similar " U " type groove 321,331,341 is identical with similar " U " type groove 311.Additionally, also respectively have a circular hole 332,342 on class sector paster vibrator arm 33,34, its size and location is consistent with in dielectric-slab 2 two through holes for coaxial line 5 inner core traverse.Class sector paster vibrator arm 33,34 is joined directly together with the outer core of two coaxial lines at circular hole place.
As shown in Figure 4, voltage standing wave ratio (VSWR) and gain (Gain) measured drawing for the present invention ± 45 ° polarization, it can be concluded that ± 45 ° are polarized in 1.6GHz-2.8GHz wide frequency range VSWR < 2, can cover current 2G/3G/4 mobile communication frequency range, and in this frequency range gain meansigma methods at 8.2dBi.
As it is shown in figure 5, be that the present invention ± 45 ° polarization separation is from spending (S21) measured drawing, it can be seen that in whole working frequency range polarise between isolation more than 30dB.
As shown in Figure 6, it is polarized in, in the embodiment of the present invention+45 °, the horizontal radiation pattern that 1.7GHz, 2.2GHz, 2.7GHz survey；Can be seen that the present invention has stable directivity, 3dB lobe width is within the scope of 65 ° ± 5 °, and location requirement is built in the base station meeting current " three sectors ", and cross polarization ratio is less than-25dB.
What finally illustrate is, preferred embodiment above is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail by above preferred embodiment, but skilled artisan would appreciate that, in the form and details it can be made various change, without departing from claims of the present invention limited range.
Claims (10)
1. the broadband dual polarization mobile base station antenna unit of a metal-loaded post, it is characterised in that: this antenna element includes feed structure, dielectric-slab, butterfly irradiation structure, short metal column, coaxial line, plastic support post and metallic reflection plate from top to bottom successively；
Described feed structure and butterfly irradiation structure lay respectively at dielectric-slab upper and lower surface by same placing direction, and described short metal column is attached on butterfly irradiation structure, and above-mentioned part relies on four plastic support post to be fixed on metallic reflection plate；Described coaxial line is through metallic reflection plate, and its inner core is connected with feed structure, and outer core is connected with butterfly irradiation structure.
2. the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post according to claim 1, it is characterized in that: described feed structure includes+45 ° of T-shape microstrip lines and-45 ° of T-shape microstrip lines, article two, microstrip line serrated vertical is positioned at center, dielectric-slab upper strata, is joined directly together with two coaxial line inner cores respectively.
3. the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post according to claim 2, it is characterized in that: described-45 ° of T-shape microstrip lines are in order to avoid spatially overlapping with+45 ° of T-shape microstrip lines, therefore are divided into microstrip line one, probe one, microstrip line two, probe two, three or five parts of microstrip line；Described microstrip line one, microstrip line three overlays on dielectric-slab upper strata, coplanar with+45 ° of T-shape microstrip lines；Probe one and probe two, by two the non-metallic through holes having on dielectric-slab, will be located in microstrip line two two ends of 1mm below dielectric-slab and be connected with microstrip line one, microstrip line three respectively.
4. the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post according to claim 3, it is characterized in that: described dielectric-slab adopts FR4 sheet material, thickness is 0.5mm, it has four non-metallic through holes, identical between two, wherein, two used by described feed structure middle probe one and probe two, two other connects used by feed structure for coaxial line inner core.
5. the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post according to claim 3, it is characterized in that: described butterfly irradiation structure includes+45 ° of butterfly radiating doublets and-45 ° of butterfly radiating doublets, two butterfly radiating doublet serrated vertical are positioned at dielectric-slab lower floor center, put at same direction with+45 ° of T-shape microstrip lines and-45 ° of T-shape microstrip lines respectively；Each butterfly radiating doublet includes two class sector paster vibrator arms, puts along dielectric-slab lower surface diagonal positions with centrosymmetric form.
6. the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post according to claim 5, it is characterized in that: described class sector paster vibrator arm includes a semicircle paster and an isosceles trapezoid paster, the radius of semicircle and the high sum span of isosceles trapezoid are at 27mm～40mm.
7. the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post according to claim 5, it is characterized in that: described class sector paster vibrator arm is all carved with similar " U " type groove, this similar " U " type groove is the circular sliding slopes of " U " type structural base to become straight line connect, and its recess points to dielectric-slab center.
8. the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post according to claim 7, it is characterized in that: under described each class sector paster vibrator arm, be attached to five identical short metal columns, it is positioned around around " U " type groove to put according to " one three one ", here short metal column is cylinder, adopts copper material.
9. the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post according to claim 1, it is characterized in that: described four plastic support post are cylinder, lay respectively at below four drift angles of dielectric-slab, its height (i.e. the height of dielectric-slab distance metallic reflection plate) is consistent, and span is at 32mm～38mm.
10. the broadband dual polarization mobile base station antenna unit of a kind of metal-loaded post according to claim 1, it is characterised in that: described metallic reflection plate is rectangular planar structure, and centre has two non-metallic through holes, can take the metal materials such as copper, aluminum matter.
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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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| 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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Cited By (23)
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| CN106785405A (en) * | 2017-01-12 | 2017-05-31 | 重庆邮电大学 | A kind of low section dual polarization dipole subbase station antenna of loading AMC reflecting plates |
| CN106785404A (en) * | 2017-01-10 | 2017-05-31 | 华南理工大学 | A kind of novel embedded broadband dual polarized antenna |
| CN106816690A (en) * | 2016-12-14 | 2017-06-09 | 上海交通大学 | The high radiation efficiency broadband seawater antenna of Metal loading |
| CN106877006A (en) * | 2017-03-13 | 2017-06-20 | 中国人民解放军国防科学技术大学 | Bow-tie type crossed dipole antenna |
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| CN108899645A (en) * | 2018-06-26 | 2018-11-27 | 重庆大学 | A kind of miniaturization dual polarization high-isolation antenna for base station |
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