CN203521630U - Wideband circularly polarized base station antenna - Google Patents
Wideband circularly polarized base station antenna Download PDFInfo
- Publication number
- CN203521630U CN203521630U CN201320591490.8U CN201320591490U CN203521630U CN 203521630 U CN203521630 U CN 203521630U CN 201320591490 U CN201320591490 U CN 201320591490U CN 203521630 U CN203521630 U CN 203521630U
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- ring
- antenna
- base station
- feed structure
- parasitic
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Abstract
The utility model discloses a wideband circularly polarized base station antenna. The wideband circularly polarized base station antenna comprises an antenna radiation unit, a feed structure and a reflecting plate. The antenna radiation unit is fixed on the reflecting plate through the feed structure. The feed structure is vertically arranged between the feed structure and the reflecting plate. The antenna radiation unit comprises a main radiation ring, parasitic rings and a radiation unit medium substrate. According to the utility model, circular polarization is realized by adopting the ring structure to form grooves at appropriate positions; the circular polarization wideband is increased by the parasitic rings; the wide impedance bindwidth is obtained by microstrip-slot coupling feed; in addition, the radiation pattern of the circularly polarized antenna is stable, the gain reaches 9 dBi, and the circularly polarized antenna is suitable to be used as the mobile communication base station antenna.
Description
Technical field
The utility model relates to microwave technical field, particularly a kind of broadband circle polarized antenna for base station.
Background technology
In wireless system, base station can be regarded a radio modem as, is responsible for reception, the transmission processing of movable signal as sending and receiving stations.Antenna for base station is the important component part of base station.Traditional antenna for base station is all linear polarized antenna, comprises perpendicular polarization antenna for base station, vertical-horizontal dual polarized antenna, ± 45 ° of Bipolarization antenna for base station.When signal is during via linear polarized antenna sending and receiving, need polarization coupling, could realize good reception.Electromagnetic wave, when propagating, can reflect, diffraction and scattering process, and its polarization is changed, and the position of the reception antenna in mobile communication is uncertain, causes transmitting antenna and reception antenna to cause loss because of polarization mismatch.Circular polarized antenna (Circularly Polarized Antenna) can avoid transmitting antenna because polarizing, not mate the loss causing with reception antenna.Polarization of electromagnetic wave can be divided into linear polarization, elliptical polarization and circular polarization three classes, and wherein circular polarization can be used as elliptically polarized special circumstances.Polarized wave all can be decomposed into two circularly polarised waves that rotation direction is contrary arbitrarily, and especially for line polarization wave, can be decomposed into two amplitudes and equate, but the contrary circularly polarised wave of rotation direction, therefore, the electromagnetic wave of polarization all can be received by circular polarized antenna arbitrarily; Otherwise, circularly polarised wave also can be decomposed into the line polarization wave of two quadratures, and the electromagnetic wave of circular polarized antenna transmitting also can be received by any poliarizing antenna, in circular polarization base station system, communication quality can not be subject to the impact of transmitting antenna and reception antenna disposing way, can avoid polarization mismatch.
In addition, if antenna radiation left-hand circular polarization ripple receives only left-hand circular polarization ripple and does not receive right-handed circular polarization ripple; Vice versa, and this is called the rotation direction orthogonality of circular polarized antenna, can utilize the rotation direction orthogonality of circular polarized antenna to improve message capacity in the polarization diversity work of mobile communication.When circularly polarised wave incides symmetrical target (as plane, sphere etc.), rotation direction takes a turn for the worse, and circular polarized antenna is applied to suppress misty rain in mobile communication and disturbs and resist multipath reflection, realizes channeling, increases power system capacity, improves communication quality.
Utility model content
Shortcoming and deficiency that the utility model exists in order to overcome prior art, provide a kind of broadband circle polarized antenna for base station.
The utility model adopts following technical scheme:
A broadband circle polarized antenna for base station, comprises antenna radiation unit, feed structure and reflecting plate, and described antenna radiation unit is fixed on reflecting plate by feed structure, and described feed structure is vertically positioned between antenna radiation unit and reflecting plate.
Described antenna radiation unit comprises primary radiation ring, parasitic ring and radiating element medium substrate, and described primary radiation ring and parasitic ring are printed on radiating element medium substrate, and described parasitic ring is nested in the white space of staying of primary radiation ring.
Described feed structure comprises microstrip line, gap, metal floor and feed structure medium substrate, it is positive that described microstrip line is printed in feed structure medium substrate, described metal floor is printed on the feed structure medium substrate back side, metal floor has gap, and described gap and metal floor form fluting floor.
Described microstrip line comprises the first matching section, the second coupled section and the 3rd matching section, and described the first matching section and the 3rd matching section are respectively perpendicular to the second coupled section, and described the first coupling segment length is 0.1 λ
0～0.3 λ
0, its characteristic impedance is 50 Ω, the 3rd coupling segment length is 0.02 λ
0～0.1 λ
0, its characteristic impedance is 50 Ω, λ
0for 136.4mm.
Described primary radiation ring consists of upper rectangle ring and lower rectangle ring, and the top of the following and lower rectangle ring of described upper rectangle ring overlaps and forms welding horizontal edge.
The middle lower end of the right edge of described upper rectangle ring has the first groove, and the middle upper end on the limit, left side of described lower rectangle ring has the second groove, and described the first groove and the second groove are about primary radiation ring Central Symmetry.
Described parasitic ring comprises the parasitic ring of two rectangles, be respectively the first parasitic ring and the second parasitic ring, the described first parasitic ring has three-flute in the middle lower end of right edge, the described second parasitic ring has the 4th groove in the middle upper end on limit, left side, and described three-flute and the 4th groove are about primary radiation ring Central Symmetry.
Height 0.1 λ of described feed structure
0～0.5 λ
0, λ
0for 136.4mm.
Described reflecting plate is the structure with side.
Described welding horizontal edge center has cross-formed slits.
Described gap end is with circular hole.
The beneficial effects of the utility model:
The utility model antenna radiation unit adopts slotted ring, only needs a feedback point just to realize circular polarization, simple in structure;
Adopt parasitic ring, strengthened axial ratio bandwidth, cover 1.7-2.7GHz; Feed structure is a printing wideband balun, and the beamwidth of antenna can cover 1.71-2.69GHz completely, has truly realized broadband;
On whole working band, axial ratio property retention is in 3dB within the scope of horizontal plane 0-30 °; Employing, with side reflecting plate, has realized the horizontal plane half-power beam width of 65 ± 5 °, and gain can reach 9dBi;
This antenna is when forming base-station antenna array, and unit interval can not occur graing lobe at high frequency with a wavelength of highest frequency, and elevation radiation patytern is stable.
Accompanying drawing explanation
Fig. 1 is the structure chart of a kind of broadband circle polarized antenna for base station of the utility model;
Fig. 2 is the vertical view of a kind of broadband circle polarized antenna for base station of the utility model;
Fig. 3 is the front sectional elevation of a kind of broadband circle polarized antenna for base station of the utility model;
Fig. 4 is the left pseudosection of a kind of broadband circle polarized antenna for base station of the utility model;
Fig. 5 is the bandwidth figure of a kind of broadband circle polarized antenna for base station of the utility model;
Fig. 6 is the axial ratio figure of a kind of broadband circle polarized antenna for base station of the utility model;
Fig. 7 is that a kind of broadband circle polarized antenna for base station of the utility model is at 1.7GHz antenna pattern;
Fig. 8 is that a kind of broadband circle polarized antenna for base station of the utility model is at 2.2GHz antenna pattern;
Fig. 9 is that a kind of broadband circle polarized antenna for base station of the utility model is at 2.7GHz antenna pattern.
Shown in figure:
1-antenna radiation unit; 2-feed structure; 3-reflecting plate; 4-primary radiation ring; The upper rectangle ring of 5A-; Rectangle ring under 5B-; The parasitic ring of 6A-first; The parasitic ring of 6B-second; 8-radiating element medium substrate; 9-welds horizontal edge; 10-microstrip line; 11-gap; 12-metal floor; 13-feed structure medium substrate; 14A-the first matching section; 14B-the second coupled section; 14C-the 3rd matching section; 15-cross-formed slits.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Embodiment
As Figure 1 and Figure 4, a kind of broadband circle polarized antenna for base station, comprise antenna radiation unit 1, feed structure 2 and reflecting plate 3, described antenna radiation unit 1 is fixed on reflecting plate 3 by feed structure 2, described feed structure 2 is vertically positioned between antenna radiation unit 1 and reflecting plate 3, be specially: the center welding of feed structure upper end and antenna radiation unit, feed structure lower end and the welding of reflecting plate center.
As shown in Figure 2, described antenna radiation unit 1 comprises primary radiation ring 4, parasitic ring and radiating element medium substrate 8, described primary radiation ring 4 and parasitic ring are printed on radiating element medium substrate 8, described parasitic ring is nested in the white space of staying of primary radiation ring 4, described in to stay white space be the white space in primary radiation ring.
In the present embodiment, radiating element medium substrate 8 adopts high frequency sheet material RO4350B, thickness 0.76mm, relative dielectric constant 3.48.
Described primary radiation ring 4 consists of upper rectangle ring 5A and lower rectangle ring 5B, the top of the following and lower rectangle ring of upper rectangle ring overlaps and forms welding horizontal edge 9, described parasitic ring comprises the first parasitic ring 6A and the second parasitic ring 6B, the described first parasitic ring 6A is positioned over the white space of staying of rectangle ring 5A, the second parasitic ring 6B is positioned over staying in white space of lower rectangle ring 5B, and the girth of described parasitic ring is 0.3 λ
0～0.9 λ
0, the middle lower end of the right edge of described upper rectangle ring 5A has the first groove, and the middle upper end on the limit, left side of described lower rectangle ring 5B has the second groove, and described the first groove and the second groove are about the Central Symmetry of primary radiation ring.
Described the first parasitic ring 6A opens three-flute in the middle lower end of right edge, and the described second parasitic ring 6B opens the 4th groove in the middle upper end on limit, left side, and about the Central Symmetry of primary radiation ring.
The aspect ratio of described upper rectangle ring 5A and lower rectangle ring 5B (ratio of long limit and minor face) scope is 0.1-1, and the girth scope of described upper rectangle ring 5A and lower rectangle ring 5B is 0.5 λ
0～1.5 λ
0.
The girth of the rectangle ring of the present embodiment is 159mm, is about 1.17 λ
0, right side opening the first groove of upper rectangle ring 5A, with welding horizontal line 9 at a distance of 6mm, the long 3mm of the line of rabbet joint; Left side opening the second groove of lower rectangle ring 5B, with welding horizontal line 9 at a distance of 6mm, the long 3mm of the line of rabbet joint; The parasitism ring girth of the present embodiment is 83mm, and the first parasitic ring 6A is at the middle lower end of right edge fluting, and the groove distance of positions is from parasitism ring 6A right side mid point 4.05mm, length 1.7mm; The second parasitic ring 6B is at the middle lower end on limit, left side fluting, and the groove distance of positions is from parasitism ring 6B left side mid point 4.05mm, length 1.7mm.
The utility model primary radiation ring and parasitic ring all have fluting to realize circular polarization radiation, from antenna theory, and appropriate location fluting on ring, loop antenna traveling-wave antenna can be at its axial direction radiation circularly polarised wave.The polarization rotation direction of this circular polarized antenna is by the determining positions of encircling upper gap, when the meeting left hand and be related to around direction and direction of wave travel of ring, be left-hand circular polarization antenna, should encircle together around direction and direction of wave travel, meet the right hand and be related to time be right-handed circular polarization antenna.
As shown in Figure 3, described feed structure 2 comprises microstrip line 10, gap 11, metal floor 12 and feed structure medium substrate 13, described microstrip line 10 is printed on feed structure medium substrate 13 fronts, described metal floor 12 is printed on feed structure medium substrate 13 back sides, and metal floor 12 has gap 11 and and metal floor 12 formation fluting floors.
Described microstrip line 10 comprises the first matching section 14A, the second coupled section 14B and the 3rd matching section 14C, and described the first matching section 14A and the 3rd matching section 14C are respectively perpendicular to the second coupled section 14B, and described the first matching section 14A length is 0.1～0.3 λ
0, its characteristic impedance is 50 Ω, the 3rd matching section 14C length is 0.02～0.1 λ
0, its characteristic impedance is 50 Ω, λ
0for 136.4mm.
In the present embodiment, the length of the first matching section 14A is 12mm, and width is 1.2mm, and the second coupled section 14B length is 8mm, and width is 0.8mm, and the 3rd matching section 14C length is 8mm, and width is 0.8mm.
Described gap 11 ends are with circular hole, and the length in described gap is 15mm, and width is 1mm, and circular radius is 1.1mm.
The shape of preferred upper end, described fluting floor projection, is convenient to and antenna radiation unit 1 welding; Welding horizontal edge 9 centers of primary radiation ring 4 have cross-formed slits 15, and seam width is 1mm, and metal floor 13 upper ends are by cross-formed slits and 4 welding of primary radiation ring, and the lower end welding of metal floor 12 is middle with reflecting plate 3.
A slotted ring for the utility model, realized circular polarization, introduce parasitic ring, be positioned in primary radiation ring, when primary radiation ring is energized, parasitic ring strengthens the axial ratio bandwidth of antenna by coupling, by adjusting the spacing between primary radiation ring and parasitic ring, can obtain good axial ratio bandwidth, in the present embodiment, the spacing of primary radiation ring and parasitic ring is 6mm.
Reflecting plate adopts the structure with side, and in the present embodiment, reflecting plate 3 length are 160mm, and overall width is 140.6mm.Reflecting plate 3 can adopt the sheet materials such as aluminium sheet, copper coin.It is 98mm that the base plate of reflecting plate 3 retains dull and stereotyped width, and dual side-edge upwards bends secondary, and bending angle is 145 ° for the first time, and the length of bending part is 26mm, and bending angle is 125 ° for the second time, and the length of bending part is 3mm.
During broadband circle polarized antenna for base station group battle array, unit interval can be used 115mm(1.04 λ
2.7GHz, λ
2.7GHzfor 110mm), at high frequency, there is not graing lobe, elevation radiation patytern is stable.
As shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, antenna radiation unit of the present utility model adopts slotted ring, only needs a feedback point just to realize circular polarization; Adopt parasitic ring, strengthened axial ratio bandwidth, its axial ratio bandwidth can cover 1.7-2.7GHz; Feed structure is a printing wideband balun, and the beamwidth of antenna can cover 1.71-2.69GHz completely, has truly realized broadband; On whole working band, axial ratio property retention is in 3dB within the scope of horizontal plane 0-30 °; Employing, with side reflecting plate, has realized the horizontal plane half-power beam width of 65 ± 5 °, and high-gain can reach 9dBi.When forming base-station antenna array, the spacing between radiating element can reach 110mm (～λ
2.7GHz), eight cell array gains can reach 17dBi.
Circular polarized antenna is extended to mobile communication antenna field, can effectively solve the problem that causes communication quality to reduce because of antenna polarization mismatch in current mobile communication system, effectively resist multipath effect, can adopt polarization diversity technique to improve power system capacity simultaneously.This circular polarization antenna for base station has whole plane structure, and volume is little, making is simple, it is roomy to be with, antenna pattern is stablized, it is high to gain, very suitable for antenna of mobile communication base station.
Above-described embodiment is preferably execution mode of the utility model; but execution mode of the present utility model is not limited by the examples; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection range of the present utility model.
Claims (7)
1. a broadband circle polarized antenna for base station, it is characterized in that, comprise antenna radiation unit, feed structure and reflecting plate, described antenna radiation unit is fixed on reflecting plate by feed structure, and described feed structure is vertically positioned between antenna radiation unit and reflecting plate;
Described antenna radiation unit comprises primary radiation ring, parasitic ring and radiating element medium substrate, and described primary radiation ring and parasitic ring are printed on radiating element medium substrate, and described parasitic ring is nested in the white space of staying of primary radiation ring;
Described feed structure comprises microstrip line, gap, metal floor and feed structure medium substrate, it is positive that described microstrip line is printed on feed structure medium substrate, described metal floor is printed on the feed structure medium substrate back side, metal floor has gap, and described gap and metal floor form fluting floor;
Described reflecting plate is the structure with side.
2. a kind of broadband circle polarized antenna for base station according to claim 1, it is characterized in that, described microstrip line comprises the first matching section, the second coupled section and the 3rd matching section, and described the first matching section and the 3rd matching section are respectively perpendicular to the second coupled section, and described the first coupling segment length is 0.1 λ
0～0.3 λ
0, its characteristic impedance is 50 Ω, the 3rd coupling segment length is 0.02 λ
0～0.1 λ
0, its characteristic impedance is 50 Ω, λ
0for 136.4mm.
3. a kind of broadband circle polarized antenna for base station according to claim 1, is characterized in that, described primary radiation ring consists of upper rectangle ring and lower rectangle ring, and the top of the following and lower rectangle ring of described upper rectangle ring overlaps and forms welding horizontal edge;
The middle lower end of the right edge of described upper rectangle ring has the first groove, and the middle upper end on the limit, left side of described lower rectangle ring has the second groove, and described the first groove and the second groove are about primary radiation ring Central Symmetry.
4. a kind of broadband circle polarized antenna for base station according to claim 1, it is characterized in that, described parasitic ring comprises the parasitic ring of two rectangles, be respectively the first parasitic ring and the second parasitic ring, the described first parasitic ring has three-flute in the middle lower end of right edge, the described second parasitic ring has the 4th groove in the middle upper end on limit, left side, and described three-flute and the 4th groove are about primary radiation ring Central Symmetry.
5. a kind of broadband circle polarized antenna for base station according to claim 1, is characterized in that, height 0.1 λ of described feed structure
0～0.5 λ
0, described λ
0for 136.4mm.
6. a kind of broadband circle polarized antenna for base station according to claim 3, is characterized in that, described welding horizontal edge center has cross-formed slits.
7. a kind of broadband circle polarized antenna for base station according to claim 1, is characterized in that, described gap end is with circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591490.8U CN203521630U (en) | 2013-09-24 | 2013-09-24 | Wideband circularly polarized base station antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591490.8U CN203521630U (en) | 2013-09-24 | 2013-09-24 | Wideband circularly polarized base station antenna |
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| Publication Number | Publication Date |
|---|---|
| CN203521630U true CN203521630U (en) | 2014-04-02 |
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ID=50380509
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320591490.8U Expired - Fee Related CN203521630U (en) | 2013-09-24 | 2013-09-24 | Wideband circularly polarized base station antenna |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157968A (en) * | 2014-07-10 | 2014-11-19 | 华南理工大学 | New concept broadband circularly polarized antenna |
| CN105449334A (en) * | 2015-12-15 | 2016-03-30 | 成都迅德科技有限公司 | Base station antenna |
| CN106505305A (en) * | 2016-10-31 | 2017-03-15 | 中国铁塔股份有限公司长春市分公司 | A kind of cutler feed antenna for base station |
| WO2023005820A1 (en) * | 2021-07-27 | 2023-02-02 | 华为技术有限公司 | Antenna and electronic device |
-
2013
- 2013-09-24 CN CN201320591490.8U patent/CN203521630U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157968A (en) * | 2014-07-10 | 2014-11-19 | 华南理工大学 | New concept broadband circularly polarized antenna |
| CN104157968B (en) * | 2014-07-10 | 2017-04-19 | 华南理工大学 | New concept broadband circularly polarized antenna |
| CN105449334A (en) * | 2015-12-15 | 2016-03-30 | 成都迅德科技有限公司 | Base station antenna |
| CN106505305A (en) * | 2016-10-31 | 2017-03-15 | 中国铁塔股份有限公司长春市分公司 | A kind of cutler feed antenna for base station |
| WO2023005820A1 (en) * | 2021-07-27 | 2023-02-02 | 华为技术有限公司 | Antenna and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20170924 |