CN102157791A - Broad-band antenna system, base station and method for adjusting declination angle of broad-band antenna - Google Patents
Broad-band antenna system, base station and method for adjusting declination angle of broad-band antenna Download PDFInfo
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- CN102157791A CN102157791A CN2010106125214A CN201010612521A CN102157791A CN 102157791 A CN102157791 A CN 102157791A CN 2010106125214 A CN2010106125214 A CN 2010106125214A CN 201010612521 A CN201010612521 A CN 201010612521A CN 102157791 A CN102157791 A CN 102157791A
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Abstract
The embodiment of the invention provides a broad-band antenna system, a base station and a method for adjusting the declination angle of a broad-band antenna, relates to the technical field of communication and aims at effectively reducing the cost. The broad-band antenna system comprises a first antenna unit and a second antenna unit, wherein a phase shift unit is connected between the first antenna unit and the second antenna unit, the phase shift unit connected between the first antenna unit and the second antenna unit is controlled by an electric tuning motor, under the rotation of the electric tuning motor, the phase shift unit connected between the first antenna unit and the second antenna unit is used for simultaneously adjusting the declination angle of the first antenna unit and the declination angle of the second antenna unit. The invention can be used in a wireless communication system.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method for adjustment of a kind of wide frequency antenna system, base station and wide frequency antenna system angle of declination.
Background technology
In mobile communication system, the angle of declination of antenna for base station is determining the overlay area of antenna beam ripple.Be the coverage optimization of realization, and produce co-channel interference mutually, need the reasonably angle of declination angle of adjustment antenna for base station for suppressing co-frequency cell to the cellular cell wireless signal.And because the decay of the signal space of different frequency is different, high-frequency signal space attenuation is big, reach multifrequency with the effect that covers, and requires the height band antenna that different angle of declinations is arranged.
At present, the wide frequency antenna system that base station site adopts comprises high band antenna element and low-frequency range antenna element, when carrying out the angle of declination adjustment, need adjust respectively height frequency range antenna element, and therefore, cost is higher, and the adjustment more complicated of angle of declination.
Summary of the invention
The main purpose of embodiments of the invention is, the method for adjustment of a kind of wide frequency antenna system, base station and wide frequency antenna angle of declination is provided, and can effectively reduce cost.
On the one hand, the embodiment of the invention provides a kind of wide frequency antenna system, comprising:
First antenna element and second antenna element, wherein, described first antenna element and second antenna element are connected with phase-shifting unit, the phase-shifting unit that the unit of the phase-shifting unit of described first antenna element and second antenna element is connected is controlled by an electricity and transfers motor, transfer under the rotation of motor at described electricity, the phase-shifting unit that the phase-shifting unit of described first antenna element is connected with second antenna element is adjusted the angle of declination of described first antenna element and the angle of declination of second antenna element simultaneously.
On the other hand, the embodiment of the invention provides a kind of base station, comprising:
The wide frequency antenna system, described wide frequency antenna system's first antenna element and second antenna element, wherein, described first antenna element and second antenna element are connected with phase-shifting unit, the phase-shifting unit that the unit of the phase-shifting unit of described first antenna element and second antenna element is connected is controlled by an electricity and transfers motor, transfer under the rotation of motor at described electricity, the phase-shifting unit that the phase-shifting unit of described first antenna element is connected with second antenna element is adjusted the angle of declination of described first antenna element and the angle of declination of second antenna element simultaneously.
On the one hand, the embodiment of the invention provides a kind of method of adjustment of wide frequency antenna angle of declination, comprising again:
Transfer motor that the angle of declination of first antenna element of wide frequency antenna and the angle of declination of second antenna element are adjusted simultaneously by an electricity; Wherein, the phase-shifting unit that described first antenna element is connected with second antenna element is controlled by described electricity and transfers motor, transfer under the rotation of motor at described electricity, the phase-shifting unit that described first antenna element is connected with second antenna element is adjusted the angle of declination of described first antenna element and the angle of declination of second antenna element simultaneously.
After adopting technique scheme, the method of adjustment of the wide frequency antenna system that the embodiment of the invention provides, base station and wide frequency antenna angle of declination, adjust when transferring motor to realize different antennae unit angle of declination by an electricity, do not need to be the independently electric accent motor of each antenna element configuration, therefore can effectively reduce cost, simultaneously, adjust the adjustment process of having simplified angle of declination in the time of different antennae unit angle of declination, saved the adjustment time.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
A kind of structural representation of the wide frequency antenna system that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is the schematic diagram of the angle of declination differential seat angle of first antenna element and second antenna element in the wide frequency antenna system of the embodiment of the invention;
The another kind of structural representation of the wide frequency antenna system that Fig. 3 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
As shown in Figure 1, the wide frequency antenna system that present embodiment provides comprises:
Concrete, shift to unit 30 and comprise an input branch, a plurality of output branch, wherein, input branch transfers motor 40 to be connected with electricity, a plurality of output branch is connected with the different oscillators of first antenna element 10 with second antenna element 20 respectively, electricity transfers the rotation of motor 40 will change the mechanical displacement of input branch correspondence, and the described change of importing the mechanical displacement of branch's correspondence, the output phase that makes phase-shifting unit 30 respectively export branch is changed thereupon, thereby cause the change of first antenna element 10 and second antenna element, 20 angle of declinations.
In the present embodiment, electricity transfers motor 40 to be connected with phase-shifting unit 30, shifts to unit 40 and can be integrated in the present embodiment wide frequency antenna system, also can be arranged on outside the present embodiment wide frequency antenna system, and the present invention does not do qualification to this.
The wide frequency antenna system that present embodiment provides, adjust when transferring motor 40 to realize first antenna element 10 and second antenna element, 20 angle of declinations by an electricity, do not need to be the independently electric accent motor of each antenna element configuration, therefore can effectively reduce cost, simultaneously, adjust the adjustment process of having simplified angle of declination in the time of different antennae unit angle of declination, saved the adjustment time.
Wherein, first antenna element 10 is different with the frequency range of second antenna element, 20 work, comparatively speaking, first antenna element 10 and second antenna element 20 are among both, one is the high band antenna element, another is the low-frequency range antenna element, i.e. the frequency range of first antenna element, 10 work is higher than the frequency range of second antenna element, 20 work or the frequency range of second antenna element, 20 work is higher than the frequency range that first antenna element 20 is worked.Here, suppose that first antenna element 10 is the high band antenna element, second antenna element 20 is the low-frequency range antenna element.Because the space attenuation amount of low-and high-frequency signal is different, high-frequency signal space attenuation is big, reaching multifrequency disturbs with effect that covers and control, require height frequency range antenna element that different angle of declinations is arranged, when that is to say present embodiment work, first antenna element 10 is different with the angle of declination of second antenna element 20, so that first antenna element 10 is identical with the coverage of second antenna element 20.As shown in Figure 2, has differential seat angle θ between the angle of declination of the angle of declination of first antenna element 10 and second antenna element 20.It is to be noted, because many-sided factors such as technology and environment, the coverage actual capabilities of first antenna element 10 and second antenna element 20 are not identical, identical only is desirable state, in the embodiment of the invention, the coverage of first antenna element 10 and second antenna element 20 is identical also comprise roughly the same.
When the wide frequency antenna system of present embodiment initially uses, can make first antenna element 10 and second antenna element 20 respectively have specific angle of declination according to the space attenuation amount of coverage, Interference Control requirement and low-and high-frequency signal.When needs carried out wireless network performance optimization etc., by the rotation that electricity is transferred motor 40, the angle of declination of control 30 pairs first antenna elements 10 of phase-shifting unit and second antenna element 20 was adjusted simultaneously.Be in course of adjustment, phase-shifting unit 30 can make differential seat angle θ between the angle of declination of the angle of declination of first antenna element 10 and second antenna element 20 immobilize or change according to predefined Changing Pattern, therefore.The wide frequency antenna system of present embodiment goes for different application scenarioss.
Concrete, when electricity transfers motor 40 to rotate, when the phase change amount of the output branch of the phase-shifting unit 30 that connects first antenna element 10 and the output branch of the phase-shifting unit 30 of connection first antenna element 10 is identical, the angle of declination change amount of the angle of declination of first antenna element 10 and second antenna element 20 is identical, and differential seat angle θ immobilizes.In like manner, when the phase change amount of the output branch of the phase-shifting unit 30 that connects first antenna element 10 and the output branch of the phase-shifting unit 30 that is connected first antenna element 10 not simultaneously, the angle of declination change amount of the angle of declination of first antenna element 10 and second antenna element 20 is different, differential seat angle θ changes, and the variation of differential seat angle θ is by the phase change decision of phase-shifting unit 30.Concrete, when electro-motor rotates, the mechanical displacement of the input branch correspondence of phase-shifting unit 30 changes, the phase place that phase-shifting unit 30 is respectively exported branch changes according to predefined rule according to the change of the mechanical displacement of input branch correspondence, and then, the angle of declination of first antenna element 10 is according to the phase change amount of shifting to unit 30 output branches of its correspondence and change according to certain rule, the angle of declination of second antenna element 20 changes according to certain rule according to the phase change amount of shifting to unit 30 output branches of its correspondence simultaneously, therefore, differential seat angle θ respectively exports the phase change amount of branch and changes according to certain rules according to shifting to unit 30, be that differential seat angle θ changes the phase change that depends on phase-shifting unit 30, perhaps differential seat angle θ changes the phase change amount that branch is respectively exported in unit 30 of shifting to that depends on.
As shown in Figure 3, the wide frequency antenna system that present embodiment provides, comprise: first antenna element 10, second antenna element 20, first antenna element 10 is connected with first phase-shifting unit 301, second antenna element 20 is connected with second phase-shifting unit 302, be in the present embodiment, first antenna element 10 and second antenna element 20 are distinguished the separate connection phase-shifting unit corresponding with it separately;
Present embodiment also comprises the linkage 50 that makes described first phase-shifting unit and the interlock of second phase-shifting unit, and wherein, linkage 50 comprises first end, second end and the 3rd end, and the motion of first end can drive second end and the 3rd end moves simultaneously; First end of linkage 50 transfers motor 40 to be connected with electricity, and second end of linkage 50 is connected with first phase-shifting unit 301, and the 3rd end of linkage 50 is connected with second phase-shifting unit 302;
In the present embodiment, electricity accent motor 40 is shifted to unit 302 by linkage 50 with first phase-shifting unit 301 and second and is connected, electricity transfers motor 40 can be integrated in the present embodiment wide frequency antenna system, also can be arranged on outside the present embodiment wide frequency antenna system, and the present invention does not do qualification to this;
When electricity transfers motor 40 to rotate, will adjust the angle of declination of first antenna element 10 and the angle of declination of second antenna element 20 simultaneously by linkage 50 drive first phase-shifting units 301 and second phase-shifting unit 302.
The wide frequency antenna system that present embodiment provides, adjust when transferring motor 40 to realize first antenna element 10 and second antenna element, 20 angle of declinations by an electricity, do not need to be the independently electric accent motor of each antenna element configuration, therefore can effectively reduce cost, simultaneously, adjust the adjustment process of having simplified angle of declination in the time of different antennae unit angle of declination, saved the adjustment time.In addition, by linkage 50, when not needing that first antenna element 10 or second antenna element 20 are adjusted simultaneously, can disconnect being connected of linkage 50 and first phase-shifting unit 301 or second phase-shifting unit 302, and another antenna element is independently carried out the angle of declination adjustment, that is to say, when the wide frequency antenna system can realize the angle of declination of first antenna element and second antenna element or independent the adjustment, with respect to wide frequency antenna system shown in Figure 1, range of application is more extensive.
Identical with wide frequency antenna system shown in Figure 1, first antenna element 10 is different with the frequency range of second antenna element, 20 work, comparatively speaking, first antenna element 10 and second antenna element 20 are among both, one is the high band antenna element, another is the low-frequency range antenna element, i.e. the frequency range of first antenna element, 10 work is higher than the frequency range of second antenna element, 20 work or the frequency range of second antenna element, 20 work is higher than the frequency range that first antenna element 20 is worked.Here, suppose that first antenna element 10 is the high band antenna element, second antenna element 20 is the low-frequency range antenna element, has differential seat angle θ between the angle of declination of the angle of declination of first antenna element 10 and second antenna element 20.
When the wide frequency antenna system initially uses, can make first antenna element 10 and second antenna element 20 respectively have specific angle of declination according to the space attenuation amount of coverage, Interference Control requirement and low-and high-frequency signal.When needs carry out wireless network performance optimization etc., transfer the rotation of motor 40 by electricity, control the angle of declination of 301 pairs first antenna elements 10 of first phase-shifting unit by linkage 50 simultaneously and adjust, the angle of declination of 302 pairs second antenna elements 20 of second phase-shifting unit is adjusted.Be in course of adjustment, can pass through linkage 50, make differential seat angle θ between the angle of declination of the angle of declination of first antenna element 10 and second antenna element 20 immobilize or change according to predefined Changing Pattern.
Concrete, when electricity transfers motor 40 to rotate, phase change amount by linkage 50 control first phase-shifting units 301 and second phase-shifting unit 302, make the angle of declination change amount of the angle of declination of first antenna element 10 and second antenna element 20 identical or different, promptly both differential seat angle θ immobilize or change according to specific rule.Differential seat angle θ changes the phase change decision that is made first phase-shifting unit 301 and second phase-shifting unit 302 by linkage 50.
Certainly, also can pass through first phase-shifting unit 301 and second phase-shifting unit 302, make differential seat angle θ between the angle of declination of the angle of declination of first antenna element 10 and second antenna element 20 immobilize or change according to predefined Changing Pattern.Concrete, when the phase change amount of first phase-shifting unit 301 and second phase-shifting unit 302 is identical, differential seat angle θ between the angle of declination of the angle of declination of first antenna element 10 and second antenna element 20 is changeless, otherwise differential seat angle θ changes according to predefined Changing Pattern.Differential seat angle θ changes the phase change decision by phase-shifting unit 30.
Accordingly, embodiments of the invention also provide a kind of base station, comprising:
The wide frequency antenna system, described wide frequency antenna system's first antenna element and second antenna element, wherein, described first antenna element and second antenna element are connected with phase-shifting unit, the phase-shifting unit that the unit of the phase-shifting unit of described first antenna element and second antenna element is connected is controlled by an electricity and transfers motor, transfer under the rotation of motor at described electricity, the phase-shifting unit that the phase-shifting unit of described first antenna element is connected with second antenna element is adjusted the angle of declination of described first antenna element and the angle of declination of second antenna element simultaneously.
The base station that the embodiment of the invention provides, adjust when transferring motor to realize first antenna element and the second antenna element angle of declination by an electricity, do not need to be the independently electric accent motor of each antenna element configuration, therefore can effectively reduce cost, save the physical space that base station site takies, simultaneously, adjust the adjustment process of having simplified angle of declination in the time of different antennae unit angle of declination, saved the adjustment time.
Wherein, the wide frequency antenna system that described wide frequency antenna system can adopt the embodiment of the invention to provide, preamble has been described in detail, and specifically please see preamble for details and describe, and repeats no more here.
Accordingly, the embodiment of the invention also provides a kind of method of adjustment of wide frequency antenna angle of declination, comprising:
Transfer motor that the angle of declination of first antenna element of wide frequency antenna and the angle of declination of second antenna element are adjusted simultaneously by an electricity;
Wherein, the phase-shifting unit that described first antenna element is connected with second antenna element is controlled by described electricity and transfers motor, transfer under the rotation of motor at described electricity, the phase-shifting unit that described first antenna element is connected with second antenna element is adjusted the angle of declination of described first antenna element and the angle of declination of second antenna element simultaneously.
The method of adjustment that the embodiment of the invention provides, adjust when transferring motor to realize first antenna element and the second antenna element angle of declination by an electricity, therefore do not need to be the independently electric accent motor of each antenna element configuration, can effectively reduce cost, save the physical space that base station site takies, simultaneously, adjust the adjustment process of having simplified angle of declination in the time of different antennae unit angle of declination, saved the adjustment time.
Wherein, first antenna element is different with the frequency range of the second antenna element work, comparatively speaking, among first antenna element and second antenna element, one is the high band antenna element, another is the low-frequency range antenna element, here, suppose that first antenna element is the high band antenna element, second antenna element is the low-frequency range antenna element, in order to reach identical coverage, has differential seat angle θ between the angle of declination of the angle of declination of first antenna element and second antenna element.
The method of adjustment of the embodiment of the invention, when the angle of declination of the angle of declination of described first antenna element and second antenna element is adjusted, differential seat angle θ between the angle of declination of the angle of declination of described first antenna element and second antenna element is immobilized or change according to predefined Changing Pattern.
One of ordinary skill in the art will appreciate that: all or part of flow process that realizes said method embodiment can be finished by the relevant hardware of computer program instructions, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (12)
1. a wide frequency antenna system is characterized in that, comprising:
First antenna element and second antenna element, wherein, described first antenna element and second antenna element are connected with phase-shifting unit, the phase-shifting unit that described first antenna element is connected with second antenna element is controlled by an electricity and transfers motor, transfer under the rotation of motor at described electricity, the phase-shifting unit that described first antenna element is connected with second antenna element is adjusted the angle of declination of described first antenna element and the angle of declination of second antenna element simultaneously.
2. wide frequency antenna according to claim 1 system is characterized in that the phase-shifting unit that described first antenna element is connected with second antenna element is same phase-shifting unit.
3. wide frequency antenna according to claim 1 system is characterized in that,
Described electricity transfers motor to be connected with described phase-shifting unit, and is integrated in the described wide frequency antenna system or is arranged on outside the described wide frequency antenna system.
4. wide frequency antenna according to claim 1 system is characterized in that,
The phase-shifting unit that described first antenna element connects is first phase-shifting unit, and the phase-shifting unit that described second antenna element connects is second phase-shifting unit;
Described wide frequency antenna system also comprises the linkage that makes described first phase-shifting unit and the interlock of second phase-shifting unit;
Described linkage comprises first end, second end and the 3rd end, first end of described linkage with transfer motor to be connected with described electricity, second end of described linkage is connected with described first phase-shifting unit, the 3rd end of described linkage is connected with described second phase-shifting unit, when described electricity is transferred revolution, drive described first phase-shifting unit and second phase-shifting unit is adjusted the angle of declination of described first antenna element and the angle of declination of second antenna element simultaneously by described linkage.
5. wide frequency antenna according to claim 1 system, it is characterized in that, the angle of declination of the angle of declination of described first antenna element and second antenna element has differential seat angle, when the angle of declination of the angle of declination of described first antenna element and second antenna element was adjusted, described differential seat angle was for fixing or change.
6. wide frequency antenna according to claim 2 system, it is characterized in that, the angle of declination of the angle of declination of described first antenna element and second antenna element has differential seat angle, when the angle of declination of the angle of declination of described first antenna element and second antenna element was adjusted, described phase-shifting unit was controlled described differential seat angle for fixing or change.
7. wide frequency antenna according to claim 4 system, it is characterized in that, the angle of declination of the angle of declination of described first antenna element and second antenna element has differential seat angle, when the angle of declination of the angle of declination of described first antenna element and second antenna element is adjusted, it is fixing or variation that described linkage is controlled described differential seat angle, and perhaps described first phase-shifting unit and second phase-shifting unit are controlled described differential seat angle for fixing or variation.
8. wide frequency antenna according to claim 1 system, it is characterized in that the frequency range that the frequency range of the described first antenna element work is higher than the frequency range of the described second antenna element work or the described second antenna element work is higher than the frequency range of the described first antenna element work.
9. according to each described wide frequency antenna system of claim 1 to 8, it is characterized in that the coverage of described first antenna element is identical with the coverage of described second antenna element.
10. a base station is characterized in that, comprises that claim 1 is to each described wide frequency antenna system of claim 9.
11. the method for adjustment of a wide frequency antenna angle of declination is characterized in that, comprising:
Transfer motor that the angle of declination of first antenna element of wide frequency antenna and the angle of declination of second antenna element are adjusted simultaneously by an electricity; Wherein, the phase-shifting unit that described first antenna element is connected with second antenna element is controlled by described electricity and transfers motor, transfer under the rotation of motor at described electricity, the phase-shifting unit that described first antenna element is connected with second antenna element is adjusted the angle of declination of described first antenna element and the angle of declination of second antenna element simultaneously.
12. method of adjustment according to claim 11, it is characterized in that, the angle of declination of the angle of declination of described first antenna element and second antenna element has differential seat angle, when the angle of declination of the angle of declination of described first antenna element and second antenna element was adjusted, described differential seat angle was for fixing or change.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106125214A CN102157791A (en) | 2010-12-29 | 2010-12-29 | Broad-band antenna system, base station and method for adjusting declination angle of broad-band antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106125214A CN102157791A (en) | 2010-12-29 | 2010-12-29 | Broad-band antenna system, base station and method for adjusting declination angle of broad-band antenna |
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| CN102157791A true CN102157791A (en) | 2011-08-17 |
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| CN2010106125214A Pending CN102157791A (en) | 2010-12-29 | 2010-12-29 | Broad-band antenna system, base station and method for adjusting declination angle of broad-band antenna |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102664310A (en) * | 2012-05-17 | 2012-09-12 | 武汉虹信通信技术有限责任公司 | Mechanical structure of high-performance two-dimensional electric tilt antenna |
| WO2015043469A1 (en) * | 2013-09-24 | 2015-04-02 | 华为技术有限公司 | Antenna system and processing method |
| CN105075012A (en) * | 2013-03-19 | 2015-11-18 | Sk电信有限公司 | Antenna device for base station and operation method therefor |
| WO2018090342A1 (en) * | 2016-11-18 | 2018-05-24 | 华为技术有限公司 | Antenna system, virtual antenna port mapping method and apparatus |
| CN108445305A (en) * | 2018-03-13 | 2018-08-24 | 南京信息工程大学 | A kind of mobile base station antenna electrical tilt angle detecting system and method |
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| US20070030208A1 (en) * | 2003-06-16 | 2007-02-08 | Linehan Kevin E | Cellular antenna and systems and methods therefor |
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| US5801600A (en) * | 1993-10-14 | 1998-09-01 | Deltec New Zealand Limited | Variable differential phase shifter providing phase variation of two output signals relative to one input signal |
| US20070030208A1 (en) * | 2003-06-16 | 2007-02-08 | Linehan Kevin E | Cellular antenna and systems and methods therefor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664310A (en) * | 2012-05-17 | 2012-09-12 | 武汉虹信通信技术有限责任公司 | Mechanical structure of high-performance two-dimensional electric tilt antenna |
| CN105075012A (en) * | 2013-03-19 | 2015-11-18 | Sk电信有限公司 | Antenna device for base station and operation method therefor |
| CN105075012B (en) * | 2013-03-19 | 2018-06-26 | Sk电信有限公司 | For the antenna assembly and its operating method of base station |
| WO2015043469A1 (en) * | 2013-09-24 | 2015-04-02 | 华为技术有限公司 | Antenna system and processing method |
| WO2018090342A1 (en) * | 2016-11-18 | 2018-05-24 | 华为技术有限公司 | Antenna system, virtual antenna port mapping method and apparatus |
| CN109964369A (en) * | 2016-11-18 | 2019-07-02 | 华为技术有限公司 | A kind of antenna system, a kind of mapping method and device of virtual-antenna port |
| CN108445305A (en) * | 2018-03-13 | 2018-08-24 | 南京信息工程大学 | A kind of mobile base station antenna electrical tilt angle detecting system and method |
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Application publication date: 20110817 |