CN102176536A - Dual-polarization radiating element and broadband base station antenna - Google Patents
Dual-polarization radiating element and broadband base station antenna Download PDFInfo
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- CN102176536A CN102176536A CN 201110031157 CN201110031157A CN102176536A CN 102176536 A CN102176536 A CN 102176536A CN 201110031157 CN201110031157 CN 201110031157 CN 201110031157 A CN201110031157 A CN 201110031157A CN 102176536 A CN102176536 A CN 102176536A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
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Abstract
The invention discloses a dual-polarization radiating element comprising a metal reflection baseplate and two pairs of vibrators arranged on the metal reflection baseplate, wherein vibrator arms of each pair of vibrators are mutually parallel or in the same line, and vibrator arms between the two pairs of vibrators are mutually perpendicular. The invention also discloses a broadband base station antenna which is formed by the linear arrangement of a plurality of dual-polarization radiating elements. The dual-polarization radiating element disclosed by the invention has the following advantages that the shapes of the vibrator arms are matched with a feeding mode of the vibrators, an integral forming mode of the stamping and bending of a metal plate is adopted, and the cost is greatly reduced; and the space between the vibrators is increased, meanwhile, the distance between the radiating elements is also increased, therefore the design difficulty of the partition degree of the antennae is reduced; and the characteristics of simple and compact structure, high performance, easiness of manufacture, convenience for installation and use, wide bandwidth, high gain, favorable cross polarization ratio, and favorable partition performance are achieved.
Description
[technical field]
The present invention relates to the antenna of mobile communication base station field, especially a kind of dual-polarization radiating unit and wideband antenna for base station.
[technical background]
Along with the fast development of mobile communication technology and application, electromagnetic environment is complicated day by day, has proposed more and more higher requirement for the design of mobile communication directional bipolarization antenna.The electric property of part antenna requires broadband, high-isolation, high-gain, the main shaft cross polarization discrimination requires greater than 20dB, ± 60 ° of cross polarization discriminations require will have good directivity and wave beam convergence simultaneously greater than 10dB, and to the harmony of surrounding environment; Also want cube little, in light weight in addition, good looking appearance, and also cost is low could satisfy the market competition demand.
The frequency requirement of the broad-band antenna of the market demand is 790MHz-960MHz's, and bandwidth is 19.4%, and requires the full frequency band standing-wave ratio less than 1.40, and the two-port insulated degree requirement is greater than 30.This broad-band antenna is all wideer than conventional various antenna for base station bandwidth, and the requirement of the standing-wave ratio of antenna is also very strict, has proposed very high challenge on design difficulty.
The radiating element of array antenna has determined the multinomial performance of antenna to a great extent, as gain, voltage standing wave ratio bandwidth, beamwidth, wave beam convergence and cross polarization discrimination etc.In the design of high-gain antenna for base station, on the basis of satisfying the beamwidth restriction, need improve the antenna radiation unit gain to greatest extent.Boundary condition has conclusive effect to wave beam convergence, the isolation of dual polarized antenna.The dual polarised radiation oscillator also requires good cross-polarization performance, and the isolation between two polarization has also proposed very high requirement.So under the prerequisite of designing the high-performance radiating element, also be an important topic to the selection of boundary condition.
[summary of the invention]
At the deficiency that the above prior art exists, the object of the present invention is to provide simple in structure, manufacturing and a kind of dual-polarization radiating unit of easy-to-install.
That another object of the present invention provides is simple in structure, a kind of wideband antenna for base station of bandwidth, high-isolation.
For realizing this purpose, the present invention adopts following technical scheme: a kind of dual-polarization radiating unit comprises metallic reflection base plate and two pairs of oscillators that are installed on the described metallic reflection base plate, the oscillator arms of every pair of oscillator is parallel to each other or is on the same straight line, oscillator arms between described two pairs of oscillators is vertical mutually, so just can launch or receive the electric field of two mutually orthogonal polarised directions.
The oscillator arms of described two pairs of oscillators is square arrangement.
The parallel longitudinal of the oscillator arms of described a pair of oscillator and metallic reflection base plate, another is vertical vertical to the oscillator arms of oscillator and metallic reflection base plate, forms the dual polarization of horizontal polarization and perpendicular polarization; The oscillator arms of perhaps described two pairs of oscillators all with the metallic reflection base plate vertically be 45 ° of angles.Form the dual polarization of+45 ° of polarization and-45 ° of polarization.
The oscillator arms of described two pairs of oscillators is cross and arranges.
The oscillator arms indentation of described two pairs of oscillators is arranged.
Feeder cable on a pair of oscillator of same polarised direction (oscillator arms is parallel to each other) connects with parallel way.
The both sides longitudinal edge of described metallic reflection base plate is respectively equipped with abutment wall.
Described oscillator is connected base and forms with one by a pair of oscillator arms, a pair of balanced feeding connector, described two oscillator arms are connected with an end of balanced feeding connector respectively, the other end of balanced feeding connector connects with the described base that is connected, and connects base and is fixed on the described metallic reflection base plate.
Described balanced feeding connector is made up of balanced feeding plate and feed connecting portion, and an end of balanced feeding plate is connected with oscillator arms, and the other end is connected with an end of feed connecting portion, the other end of feed connecting portion be connected base and connect.
Be parallel to each other between two balanced feeding plates in the described oscillator, the feed connecting portion that connects with the balanced feeding plate opens to the outside of two parallel balanced feeding plates, then with is connected the base connection.
In two oscillator arms of described oscillator, wherein be bent upwards out internally a feed tab that is stretched over another oscillator arms top on the oscillator arms.
Described feed tab can be L-shaped.
Described feed tab is connected with the inner wire of feeder cable, and the oscillator arms of the outer conductor of feeder cable and feed tab end below and the feeder cable weld part that is positioned on the feed connecting portion with the terminal the same side of feed tab are connected.
The terminal elder generation of described oscillator arms is inclined relative to horizontal then downwards, and the least significant end of described oscillator arms is bent to form the kink parallel with the balanced feeding plate downwards.
Described oscillator can adopt the integrated molding structure of metal plate punching bending, can reduce cost greatly like this, assembles also simpler and easy.
A kind of wideband antenna for base station is linear array by several described dual-polarization radiating units and forms.
The number of described dual-polarization radiating unit is more than three.
Be horizontally installed with sheet metal between the described dual-polarization radiating unit, can under the situation that does not influence directional performance, improve the isolation between the antenna polarization like this.
Compared with prior art, the present invention possesses following advantage: at first, the special oscillator arms shape and the feeding classification of oscillator match, and adopt the integrated form of metal plate punching bending, greatly reduce cost; Secondly, the unique shape of oscillator arms is compared common linear oscillator arms, has increased the spacing between the oscillator, has also increased the spacing between the radiating element simultaneously, thereby has reduced the design difficulty of isolation between antennas; Have simple and compact for structure and high performance advantage, and be easy to make, conveniently install and use; Bandwidth is wide, and gain is high, and cross polarization is than the characteristics good with the isolation performance.
[description of drawings]
Fig. 1 is the stereogram of oscillator of the present invention;
Fig. 2 is the front view of oscillator of the present invention;
Fig. 3 is the stereogram of a kind of dual-polarization radiating unit of the present invention;
Fig. 4 is the stereogram of a kind of band dual polarization antenna for base station embodiment 1 of the present invention;
Fig. 5 is the stereogram of a kind of band dual polarization antenna for base station embodiment 2 of the present invention;
Fig. 6 is the stereogram of a kind of band dual polarization antenna for base station embodiment 3 of the present invention;
Fig. 7 is the stereogram of a kind of band dual polarization antenna for base station embodiment 4 of the present invention;
Fig. 8 is the curve chart of-45 ° of polarization of specific embodiment actual measurement of the present invention port voltage standing-wave ratio;
Fig. 9 is the curve chart of+45 ° of polarization of specific embodiment actual measurement of the present invention port voltage standing-wave ratio;
Figure 10 is the curve chart of the isolation between two polarization of specific embodiment of the present invention actual measurement.
[embodiment]
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
A kind of dual-polarization radiating unit is that necessity of array antenna constitutes the unit.As shown in Figure 3, described dual-polarization radiating unit comprises metallic reflection base plate 8 and two pairs of oscillator 10 and corresponding binding posts that are installed on the described metallic reflection base plate 8.The oscillator arms 4 of every pair of oscillator 10 is parallel to each other, and has same polarised direction; Oscillator arms 4 between described two pairs of oscillators 10 is vertical mutually.Feeder cable on described every pair of oscillator 10 connects with parallel way, forms a polarization.The edge, vertical both sides of described metallic reflection base plate 8 is respectively equipped with abutment wall 9.The oscillator arms 4 of described oscillator 10 and metallic reflection base plate 8 vertical becomes miter angle, form the dual polarization of+45 ° of polarization and-45 ° of polarization, and the oscillator arms 4 of described two pairs of oscillators is square arrangement.
As depicted in figs. 1 and 2, described oscillator 10 is connected base 1 with one and is formed by a pair of oscillator arms 4, a pair of balanced feeding connector; Described two oscillator arms 4 are on the same straight line, are connected with an end of balanced feeding connector respectively, and the other end of balanced feeding connector connects with the described base 1 that is connected.Described balanced feeding connector is made up of balanced feeding plate 3 and feed connecting portion 2, one end of balanced feeding plate 3 is connected with oscillator arms 4, the other end is connected with an end of feed connecting portion 2, the other end of feed connecting portion 2 be connected base 1 and connect, form a complete oscillator 10.Be parallel to each other between two balanced feeding plates 3 of described oscillator 10.The feed connecting portion 2 that connects with balanced feeding plate 3 opens to the outside of two parallel balanced feeding plates 3, and then with is connected base 1 connection.Oscillator 10 is fixed on the described metallic reflection base plate 8 by connecting base 1.The balanced feeding connector supports and fixing oscillator 10 in to the radiating element feed.The outside open feed connecting portion 2 in balanced feeding connector bottom, different with the upright downward balanced feeder of common about quarter-wave height, can reduce the antenna section height, increase bottom space simultaneously, be convenient to make connection base 1 to be installed on the metallic reflection base plate 8.
In described two oscillator arms 4, be bent upwards out a feed tab 41 that is stretched over another oscillator arms top on one of them oscillator arms 4 internally.Described feed tab 41 can be L-shaped.Feed tab 41 is the part in the oscillator arms 4, is not separate part, can reduce the cost of antenna and reduce the process of installing, and feeder cable just needn't bending in welding, strengthened the reliability of antenna, simultaneously, the feed tab of L shaped shape had the impedance matching effect in 41 minutes.Described oscillator arms 4 terminal is inclined relative to horizontal earlier (can be horizontal by 135 °) downwards, and the least significant end of described then oscillator arms 4 is bent to form the kink 5 parallel with balanced feeding plate 2 downwards.The unique shape of described oscillator arms 4 is compared common linear oscillator arms, has increased the spacing between the oscillator, has also increased the spacing between the radiating element simultaneously, thereby has reduced the design difficulty of isolation between antennas; The cross polarization that has improved antenna simultaneously cooperates L shaped feed part than performance index, can design the antenna for base station with wideband radiation characteristic.
Above-described oscillator 10 can adopt the integrated molding structure of metal plate punching bending, can reduce cost greatly like this, assembles also simpler and easy.
As shown in Figure 5, on the basis, the arrangement mode of oscillator has been done change at embodiment 1.The oscillator arms 4 of described two pairs of oscillators 10 is square arrangement, the oscillator arms 4 of wherein a pair of oscillator 10 and the parallel longitudinal of metallic reflection base plate 8, another is vertical vertical to the oscillator arms 4 of oscillator 10 and metallic reflection base plate 8, forms the dual-polarization radiating unit of one group of horizontal polarization and perpendicular polarization.
As shown in Figure 6, every pair of oscillator arms 4 that is installed in the oscillator 10 on the described metallic reflection base plate 8 is on the same straight line, just is word order; Oscillator arms 4 between the two pairs of oscillators 10 vertically is cross mutually and arranges.The oscillator arms 4 of wherein said every pair of oscillator 10 can with metallic reflection base plate 8 vertically be 45 ° of angles; The perhaps parallel longitudinal of the oscillator arms 4 of wherein a pair of oscillator 10 and metallic reflection base plate 8, another is vertical vertical to the oscillator arms 4 of oscillator 10 and metallic reflection base plate 8, forms the dual-polarization radiating unit of one group+45 ° polarization and-45 ° of polarization.
Embodiment 4
As shown in Figure 7, two pairs of oscillator arms 4 indentations that are installed in the oscillator 10 on the described metallic reflection base plate 8 are arranged.Wherein, the oscillator arms 4 and vertically being of metallic reflection base plate 8 of each shown oscillator 10 are 45 ° of angles, form the dual-polarization radiating unit of one group+45 ° polarization and-45 ° of polarization.The gap of such arrangement mode between can the Enhanced Radiation Reduced Blast unit.
Oscillator is arranged at metallic reflection base plate 8 and has been constituted a complete dual-polarization radiating unit 12 among the above embodiment.
As shown in Figure 4, a kind of band dual polarization antenna for base station is made up of several described dual-polarization radiating units 12 linear array successively.The number of linearly aligned dual-polarization radiating unit 12 is more than 3,4,5,6,7,8,9 or 9.A plurality of dual-polarization radiating units 12 linear array are successively formed a complete band dual polarization antenna for base station.Described polarized radiation is horizontally installed with sheet metal 13 between the unit, can improve the isolation between the antenna polarization under the situation that does not influence the directional diagram performance like this.Described dual-polarization radiating unit can be installed on the same metallic reflection base plate 8 jointly, and the edge, vertical both sides of metallic reflection base plate 8 is equipped with abutment wall 9.
Shown in Fig. 8-10, for the band dual polarization antenna for base station full frequency band made from embodiment 1 described dual-polarization radiating unit has good directional diagram: 790～960MHz frequency range, voltage standing wave ratio is less than 1.4, and isolation is greater than 33dB, and Unit 5 actual measurement gains at 14.5dBi between the 15.5dBi.Horizontal plane 3dB beamwidth is 61 to spend to 70 degree, and the main shaft cross polarization is than greater than 20dB, ± 60 ° of cross polarizations than greater than 10dB.Environmental test is qualified, can satisfy the requirement of mobile communication system well.Find out easily that from the above the present invention has simple and compact for structure and high performance advantage, and be easy to make, conveniently install and use; And compare with the principal mode of current similar product, bandwidth is wide, and gain is high, and cross polarization is than the characteristics good with the isolation performance.In addition, the band dual polarization antenna for base station made from embodiment 2, embodiment 3 and embodiment 4 described dual-polarization radiating units has above-mentioned performance and characteristics equally.
The foregoing description is a preferred implementation of the present invention; but not merely be restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, all be included within protection scope of the present invention.
Claims (18)
1. dual-polarization radiating unit, it is characterized in that, comprise metallic reflection base plate and two pairs of oscillators that are installed on the described metallic reflection base plate, the oscillator arms of every pair of oscillator is parallel to each other or is on the same straight line, and the oscillator arms between described two pairs of oscillators is vertical mutually.
2. a kind of dual-polarization radiating unit according to claim 1 is characterized in that the oscillator arms of described two pairs of oscillators is square arrangement.
3. a kind of dual-polarization radiating unit according to claim 2, it is characterized in that, the oscillator arms of a pair of oscillator in described two pairs of oscillators and the parallel longitudinal of metallic reflection base plate, another is vertical vertical to the oscillator arms of oscillator and metallic reflection base plate, forms the dual polarization of horizontal polarization and perpendicular polarization; The oscillator arms of perhaps described two pairs of oscillators all with the metallic reflection base plate vertically be 45 ° of angles, form the dual polarization of+45 ° of polarization and-45 ° of polarization.
4. a kind of dual-polarization radiating unit according to claim 1 is characterized in that, the oscillator arms of described two pairs of oscillators is cross and arranges.
5. a kind of dual-polarization radiating unit according to claim 1 is characterized in that, the oscillator arms indentation of described two pairs of oscillators is arranged.
6. according to claim 1,2,3,4 or 5 described a kind of dual-polarization radiating units, it is characterized in that the feeder cable on a pair of oscillator of same polarised direction connects with parallel way.
7. a kind of dual-polarization radiating unit according to claim 6 is characterized in that, the edge, vertical both sides of described metallic reflection base plate is respectively equipped with abutment wall.
8. according to claim 1,2,3,4,5 or 7 described a kind of dual-polarization radiating units, it is characterized in that, described oscillator is connected base and forms with one by a pair of oscillator arms, balanced feeding connector, described two oscillator arms are connected with an end of balanced feeding connector respectively, the other end of balanced feeding connector connects with the described base that is connected, and connects base and is fixed on the described metallic reflection base plate.
9. a kind of dual-polarization radiating unit according to claim 8, it is characterized in that, described balanced feeding connector is made up of balanced feeding plate and feed connecting portion, one end of balanced feeding plate is connected with oscillator arms, the other end is connected with an end of feed connecting portion, the other end of feed connecting portion be connected base and connect.
10. a kind of dual-polarization radiating unit according to claim 9, it is characterized in that, be parallel to each other between two balanced feeding plates of described oscillator, open to the outside of two parallel balanced feeding plates with the feed connecting portion that the balanced feeding plate connects, and then with is connected the base connection.
11. a kind of dual-polarization radiating unit according to claim 10 is characterized in that, in two oscillator arms of described oscillator, wherein is bent upwards out internally a feed tab that is stretched over another oscillator arms top on the oscillator arms.
12. a kind of dual-polarization radiating unit according to claim 11 is characterized in that described feed tab is L-shaped.
13. a kind of dual-polarization radiating unit according to claim 11, it is characterized in that, described feed tab is connected with the inner wire of feeder cable, and the oscillator arms of the outer conductor of feeder cable and feed tab end below and being positioned at the feed connecting portion of the terminal the same side of feed tab is connected.
14. a kind of dual-polarization radiating unit according to claim 13 is characterized in that, the terminal of described oscillator arms is inclined relative to horizontal downwards earlier, and the least significant end of described oscillator arms is bent to form the kink parallel with the balanced feeding plate downwards then.
15. want 14 described a kind of dual-polarization radiating units, it is characterized in that described oscillator is the integrated molding structure that adopts the metal plate punching bending according to right.
16. a wideband antenna for base station is characterized in that, is linear array by several described dual-polarization radiating units and forms.
17. a kind of wideband antenna for base station according to claim 16 is characterized in that the number of described dual-polarization radiating unit is more than three.
18. according to claim 16 or 17 described a kind of wideband antenna for base station, it is characterized in that, be horizontally installed with sheet metal between the described dual-polarization radiating unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110031157 CN102176536A (en) | 2011-01-28 | 2011-01-28 | Dual-polarization radiating element and broadband base station antenna |
| PCT/CN2011/082316 WO2012100582A1 (en) | 2011-01-28 | 2011-11-17 | Dual-polarization radiation unit and broadband base station antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110031157 CN102176536A (en) | 2011-01-28 | 2011-01-28 | Dual-polarization radiating element and broadband base station antenna |
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| CN102176536A true CN102176536A (en) | 2011-09-07 |
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| CN 201110031157 Pending CN102176536A (en) | 2011-01-28 | 2011-01-28 | Dual-polarization radiating element and broadband base station antenna |
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| WO (1) | WO2012100582A1 (en) |
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| CN102544711A (en) * | 2012-01-06 | 2012-07-04 | 华为技术有限公司 | Antenna oscillator and production method thereof as well as communication equipment |
| WO2012100582A1 (en) * | 2011-01-28 | 2012-08-02 | 京信通信技术(广州)有限公司 | Dual-polarization radiation unit and broadband base station antenna |
| CN102723577A (en) * | 2012-05-18 | 2012-10-10 | 京信通信系统（中国）有限公司 | Wide-band annular dual polarized radiating element and array antenna |
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