CN106299690A - A kind of differential feed Broadband circularly polarized antenna - Google Patents
A kind of differential feed Broadband circularly polarized antenna Download PDFInfo
- Publication number
- CN106299690A CN106299690A CN201610855305.XA CN201610855305A CN106299690A CN 106299690 A CN106299690 A CN 106299690A CN 201610855305 A CN201610855305 A CN 201610855305A CN 106299690 A CN106299690 A CN 106299690A
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- microstrip line
- circularly polarized
- bending
- feed
- polarized antenna
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- 238000005452 bending Methods 0.000 claims abstract description 51
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
-
- 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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
Landscapes
- Waveguide Aerials (AREA)
Abstract
The invention discloses a kind of differential feed Broadband circularly polarized antenna, including antenna radiation unit, medium substrate, reflecting plate and feed structure, antenna radiation unit is etched in the back side of medium substrate, described feed structure is etched in the front of medium substrate, and described medium substrate is fixed on the top of reflecting plate by supporting construction；Described antenna radiation unit is made up of the first bending oscillator, the second bending oscillator, coplanar microstrip line and feed structure, first and second bending oscillator connects by coplanar microstrip line, and two first bending oscillators and two second bend oscillator about the centrosymmetry of medium substrate.The present invention has differential feed structure, it is simple to integrated with radio-frequency front-end.
Description
Technical field
The present invention relates to moving communicating field, be specifically related to a kind of differential feed Broadband circularly polarized antenna.
Background technology
Antenna is a requisite part in radio communication, along with the fast development of wireless communication technology, antenna technology
Have also been obtained and develop rapidly, also promote the needs of fully integrated radio frequency front-end product simultaneously.Integrated RF front end generally uses difference
The technology of dividing, and traditional antenna is designed as one port devices more, it is impossible to the most integrated with radio-frequency front-end, ask to solve this
Topic, generally uses balun that differential signal is converted into single port signal.Differential antennae unlike traditional antenna, differential antennae
Change traditional method for designing, use two feed port, directly differential signal is fed into two ports of antenna, thus
Avoid the use of balun, that is avoid the loss of the radio-frequency front-end caused due to the use of balun, improve antenna
Efficiency.Simultaneously because differential antennae can directly be connected with radio-frequency front-end, thus more conducively integrated with radio-frequency front-end, therefore difference
The research of antenna has very important realistic meaning and good application prospect.
Circular polarized antenna has a following properties: 1) rotation direction of circular polarisation has orthogonality, i.e. left-hand circular polarization ripple
Can only be left-hand circularly polarized antenna to receive, and can not be right-hand circularly polarized antenna and receive, vice versa, and this character makes circular polarisation
Antenna is widely used in polarization diversity technique, to improve communication channel capacity；2) circular polarized antenna is able to receive that any pole
The incoming wave changed, and the ripple that circularly polarised wave also is able to by arbitrarily polarizing receives, this can reduce the polarization mismatch between antenna；3) pole
When change ripple incides symmetric objects, its echo rotation direction can take a turn for the worse, and the circularly polarised wave of different rotation directions has bigger isolation.
Therefore, circular polarized antenna has important application in a wireless communication system.
The implementation method of common circular polarized antenna is following several: microstrip antenna, helical antenna and orthogonal oscillator
Deng.Microstrip antenna has simple in construction, an advantage such as lightweight, but the narrow bandwidth of microstrip antenna, it is impossible to meet current wireless and lead to
The requirement of communication system.The structure of helical antenna is usually column type, takes up room relatively big, is not easy to collection second-class with communication system
Become.Orthogonal oscillator circular polarisation to be realized, needs that feed-in amplitude is equal, the electric current of phase 90 degree, therefore typically requires complexity
Feeding network.
Summary of the invention
In order to overcome shortcoming that prior art exists with not enough, the present invention provides a kind of broadband circle polarized sky of differential feed
Line.This antenna is that a kind of radiation gain is high, and the differential feed Broadband circularly polarized antenna that directional diagram is stable, and this antenna can realize
The impedance bandwidth of 45% and circular polarisation bandwidth, cover the frequency range of 1.7-2.7GHz.
The present invention adopts the following technical scheme that
A kind of differential feed Broadband circularly polarized antenna, including antenna radiation unit, medium substrate, reflecting plate and feed knot
Structure, described antenna radiation unit is etched in the back side of medium substrate, and described feed structure is etched in the front of medium substrate, described
Medium substrate is fixed on the top of reflecting plate by supporting construction；
Described antenna radiation unit is planar structure, by the first bending oscillator, the second bending oscillator, coplanar microstrip line and feedback
Electricity structure is constituted, and first and second bending oscillator is connected by coplanar microstrip line, and the first bending oscillator and the second bending oscillator close
Centrosymmetry in medium substrate.
Described coplanar microstrip line is with the center of medium substrate as center of rotation, along the axis of medium substrate to left-handed 0-
30 degree.
Described coplanar microstrip line is made up of two narrow microstrip lines and a wide microstrip line, and described two narrow microstrip lines are connected to
The two ends of wide microstrip line, first and second bending oscillator described is by narrow feed microstrip line.
Described first bending oscillator and the second bending oscillator are constituted by long-armed and galianconism, long-armed one end and narrow microstrip line
Connecting, after long-armed other end bending once, its end bends once to coplanar microstrip line direction again, and described bending angle is 90
Degree；One end of galianconism is connected with narrow microstrip line, and its other end bends once, and its bending angle is 90 degree.
Described wide microstrip line is different from the characteristic impedance of narrow microstrip line.
Also include and first and second feeder line of phase 180 degree differential signals equal for feed-in amplitude, described
One and second the inner core of feeder line be connected with the two ends of feed structure by two non-metallic vias respectively, first and second feeder line
Outer core be connected with wide microstrip line, the non-metallic via of said two is positioned at the two ends of feed structure.
A length of 0.6 λ of first and second bending oscillator describedL-λL, wherein λLExist for this center of antenna frequency 2.2GHz
Corresponding wavelength in free space.
Described supporting construction is specifically made up of four support columns, and described support column is made up of insulant.
The characteristic impedance of described wide microstrip line is 130-160 Ω, and the characteristic impedance of described narrow microstrip line is 200-240 Ω.
The characteristic impedance of described feed structure is 50 Ω.
Beneficial effects of the present invention:
(1) present invention uses differential feed, it is to avoid the use of balun, decreases the use due to balun and penetrating of causing
Frequently the loss of front end, improves the efficiency of antenna, uses differential feed to improve the integrated level of radio-frequency front-end simultaneously；
(2) present invention has planar structure, its simple in construction, it is easy to make；
(3) the quadrature component generation amplitude that the present invention bends oscillator itself by non-central feed is equal, phase 90
The electric current of degree realizes circular polarisation；
(4) frequency band that present invention achieves mobile communication base station 1.7-2.7GHz covers, and the gain in this frequency range reaches
To more than 9.5dBi, there is stable directional diagram simultaneously；
(5) present configuration is simple, and building block is few, it is easy to processing, and stable performance.
Accompanying drawing explanation
Fig. 1 is the structure chart of the present invention；
Fig. 2 is the structure chart of the antenna radiation unit of the present invention；
Fig. 3 is the profile of the present invention；
Fig. 4 is the impedance bandwidth of the differential feed Broadband circularly polarized antenna of the present invention；
Fig. 5 is the axial ratio bandwidth of the differential feed Broadband circularly polarized antenna of the present invention；
Fig. 6 is the gain of the differential feed Broadband circularly polarized antenna of the present invention；
Fig. 7 is the differential feed Broadband circularly polarized antenna horizontal radiation pattern at 2.2GHz of the present invention；
Fig. 8 is the differential feed Broadband circularly polarized antenna elevation radiation patytern at 2.2GHz of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As shown in Figures 1 and 3, a kind of differential feed Broadband circularly polarized antenna, including antenna radiation unit 1, medium substrate
11, reflecting plate 2, first, second feeder line 3A, 3B and feed structure 9, described antenna radiation unit 1 is etched in the back of the body of medium substrate
Face, described feed structure 9 is etched in the front of medium substrate, described reflecting plate 2 be the length of side be the square of 200mm, can use
The sheet materials such as aluminium sheet, supporting construction 4 is made up of insulant, and described antenna radiation unit 1 is fixed on reflecting plate by supporting construction
Surface, distance reflecting plate height be 0.1 λL-0.5λL, wherein λLCorresponding at this center of antenna frequency 2.2GHz
Free space wavelength, distance 33mm in the present embodiment.
As in figure 2 it is shown, described antenna radiation unit 1 is planar structure, by two bending oscillators and two characteristic impedances not
Same coplanar microstrip line is constituted, and two bending oscillators are by coplanar feed microstrip line, and medium substrate 11 uses high frequency sheet material
Rogers4350B, its thickness is 0.76mm, and relative dielectric constant is 3.48, and described coplanar microstrip line is with the center of medium substrate
For center of rotation, rotating a certain angle to the left from the axis of medium substrate, this angle is in the range of 0-30 degree.
The a length of 9.6mm of described feed structure, wherein width is 1.7mm, and characteristic of correspondence impedance is 50 Ω.
As in figure 2 it is shown, described first bending oscillator and second bending oscillator by two length not wait arm composition, first
And second bending oscillator about the centrosymmetry of medium substrate, said two length unequal arm includes long-armed and galianconism, and first is curved
Folding oscillator long-armed 6 and first one end of galianconism 5 of bending oscillator be connected with narrow microstrip line, first bend oscillator long-armed another
After end bending once, its end bends once to coplanar microstrip line direction again, and described bending angle is 90 degree；First bending oscillator
Galianconism the other end bend once, its bending angle is 90 degree.
One end of the galianconism 5A of long-armed 6A and the second bending oscillator of described second bending oscillator is connected with narrow microstrip line, its
After long-armed other end other end bending once, its end bends once to coplanar microstrip line direction again, and described bending angle is
90 degree；The other end of the galianconism of the second bending oscillator bends once, and its bending angle is 90 degree.
Two bending oscillators are by narrow feed microstrip line, and described coplanar microstrip line is wide by two narrow microstrip lines 7,12 and
Microstrip line 8 is constituted, and the narrow microstrip line of said two 7,12 is connected with the two ends of wide microstrip line 8, first and second bending oscillator described
Connected by coplanar microstrip line.
As in figure 2 it is shown, long-armed 6 its one end of the galianconism 5 of the first bending oscillator and the first bending oscillator are with narrow microstrip line even
Connecing, the other end bends；The second bending galianconism 5A of oscillator, long-armed 6A and the first bending oscillator structure phase of the second bending oscillator
With.
A length of 0.6 λ of first and second bending oscillator describedL-λL, wherein λLExist for this center of antenna frequency 2.2GHz
Corresponding wavelength in free space.
The characteristic impedance of described wide microstrip line is 130-160 Ω, and the characteristic impedance of described narrow microstrip line is 200-240 Ω.
First and second feeder line described is equal for feed-in amplitude, and the differential signal that phase is 180 degree, in the present embodiment
Feeder line employing is soft coaxially also includes two non-metallic vias, and two non-metallic vias are positioned at the two ends of feed structure 9, institute
State feed structure and be specially feeding microstrip line；
One end of the inner core of described first feeder line is welded through non-metallic via 10A with one end of feed structure, described
Inner core one end of second feeder line is welded through non-metallic via 10B with the other end of feed structure, first and second feedback described
One end of the outer conductor of line is welded with wide microstrip line respectively, and the other end is connected with reflecting plate.
As shown in Figure 4, be the impedance bandwidth of the present embodiment, as it is shown in figure 5, be the axial ratio bandwidth of the present embodiment, by Fig. 4 and
Fig. 5 is it may be concluded that the differential feed Broadband circularly polarized antenna of the present invention has impedance bandwidth and the axle ratio of 1.7-2.7GHz
Bandwidth, return loss reaches-15dB substantially, and axle ratio, less than 3dB, can be completely covered the 1710-2690MHz frequency of portable antenna base station
Section, and by as shown in Figure 6, it is known that the present embodiment gain in the frequency range of 1.7-2.7GHz reaches more than 9.5dBi.
As shown in Figures 7 and 8, being the present embodiment antenna horizontal radiation pattern at mid frequency 2.2GHz, thus figure can
Knowing, the differential feed Broadband circularly polarized antenna of the present invention has stable antenna pattern.
The present embodiment only just can realize circular polarization radiation with a radiating element, has simple planar structure, makes
Simply；And the present embodiment be advantageous for radio-frequency front-end integrated；Work strip is roomy, and impedance bandwidth and axial ratio bandwidth can be covered completely
The 1710-2690MHz frequency range of lid portable antenna base station, antenna gain is high, and antenna pattern is stable simultaneously.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not by described embodiment
Limit, the change made under other any spirit without departing from the present invention and principle, modify, substitute, combine, simplify,
All should be the substitute mode of equivalence, within being included in protection scope of the present invention.
Claims (10)
1. a differential feed Broadband circularly polarized antenna, it is characterised in that include antenna radiation unit, medium substrate, reflecting plate
And feed structure, described antenna radiation unit is etched in the back side of medium substrate, and described feed structure is etched in medium substrate
Front, described medium substrate is fixed on the top of reflecting plate by supporting construction；
Described antenna radiation unit is planar structure, by the first bending oscillator, the second bending oscillator, coplanar microstrip line and feed knot
Structure is constituted, and first and second bending oscillator is connected by coplanar microstrip line, and the first bending oscillator and the second bending oscillator are about Jie
The centrosymmetry of matter substrate.
A kind of differential feed Broadband circularly polarized antenna the most according to claim 1, it is characterised in that described coplanar microstrip line
With the center of medium substrate as center of rotation, along the axis of medium substrate to left-handed 0-30 degree.
A kind of differential feed Broadband circularly polarized antenna the most according to claim 1, it is characterised in that described coplanar microstrip line
Being made up of two narrow microstrip lines and a wide microstrip line, described two narrow microstrip lines are connected to the two ends of wide microstrip line, and described the
One and second bends oscillator by narrow feed microstrip line.
A kind of differential feed Broadband circularly polarized antenna the most according to claim 1, it is characterised in that described first bending is shaken
Son and the second bending oscillator are constituted by long-armed and galianconism, and long-armed one end is connected with narrow microstrip line, long-armed other end bending
After once, its end bends once to coplanar microstrip line direction again, and described bending angle is 90 degree；One end of galianconism and narrow micro-strip
Line connects, and its other end bends once, and its bending angle is 90 degree.
A kind of differential feed Broadband circularly polarized antenna the most according to claim 4, it is characterised in that described wide microstrip line with
The characteristic impedance of narrow microstrip line is different.
A kind of differential feed Broadband circularly polarized antenna the most according to claim 1, it is characterised in that also include for feed-in
Amplitude is equal and first and second feeder line of 180 degree of differential signals of phase, and the inner core of first and second feeder line described is respectively
Being connected with the two ends of feed structure by two non-metallic vias, the outer core of first and second feeder line is connected with wide microstrip line,
The non-metallic via of said two is positioned at the two ends of feed structure.
A kind of differential feed Broadband circularly polarized antenna the most according to claim 1, it is characterised in that described first and second
A length of 0.6 λ of bending oscillatorL-λL, wherein λLFor this center of antenna frequency 2.2GHz corresponding wavelength in free space.
A kind of differential feed Broadband circularly polarized antenna the most according to claim 1, it is characterised in that described supporting construction has
Body is made up of four support columns, and described support column is made up of insulant.
A kind of differential feed Broadband circularly polarized antenna the most according to claim 5, it is characterised in that described wide microstrip line
Characteristic impedance is 130-160 Ω, and the characteristic impedance of described narrow microstrip line is 200-240 Ω.
A kind of differential feed Broadband circularly polarized antenna the most according to claim 1, it is characterised in that described feed structure
Characteristic impedance be 50 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610855305.XA CN106299690A (en) | 2016-09-27 | 2016-09-27 | A kind of differential feed Broadband circularly polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610855305.XA CN106299690A (en) | 2016-09-27 | 2016-09-27 | A kind of differential feed Broadband circularly polarized antenna |
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| Publication Number | Publication Date |
|---|---|
| CN106299690A true CN106299690A (en) | 2017-01-04 |
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| CN201610855305.XA Pending CN106299690A (en) | 2016-09-27 | 2016-09-27 | A kind of differential feed Broadband circularly polarized antenna |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448246A (en) * | 2018-05-21 | 2018-08-24 | 华南理工大学 | A kind of differential feed directional diagram reconstructable aerial |
| CN108493572A (en) * | 2018-02-28 | 2018-09-04 | 哈尔滨工程大学 | A kind of orientation circular polarized antenna based on bending T shape rotational structures |
| WO2020134448A1 (en) * | 2018-12-25 | 2020-07-02 | 瑞声声学科技(深圳)有限公司 | Antenna unit, antenna array, and base station |
| CN112332087A (en) * | 2020-10-29 | 2021-02-05 | 杭州电子科技大学 | Differential feed circular polarization filtering antenna based on super surface structure |
| CN112421228A (en) * | 2020-11-25 | 2021-02-26 | 博微太赫兹信息科技有限公司 | Double-layer differential feed circularly polarized antenna |
| CN114665261A (en) * | 2020-12-22 | 2022-06-24 | 华为技术有限公司 | Antenna and communication equipment |
| CN114665260A (en) * | 2020-12-22 | 2022-06-24 | 华为技术有限公司 | Antenna and communication equipment |
| WO2022227128A1 (en) * | 2021-04-28 | 2022-11-03 | 领翌技术(横琴)有限公司 | Circularly polarized antenna |
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|---|---|---|---|---|
| WO2008065995A1 (en) * | 2006-11-30 | 2008-06-05 | Panasonic Corporation | Differential feeding directivity-variable slot antenna |
| CN104157968A (en) * | 2014-07-10 | 2014-11-19 | 华南理工大学 | New concept broadband circularly polarized antenna |
| CN105356053A (en) * | 2015-11-27 | 2016-02-24 | 华南理工大学 | Differential broadband dual-polarization base station antenna for improving cross polarization ratio |
| CN206225547U (en) * | 2016-09-27 | 2017-06-06 | 华南理工大学 | A kind of differential feed Broadband circularly polarized antenna |
-
2016
- 2016-09-27 CN CN201610855305.XA patent/CN106299690A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008065995A1 (en) * | 2006-11-30 | 2008-06-05 | Panasonic Corporation | Differential feeding directivity-variable slot antenna |
| CN104157968A (en) * | 2014-07-10 | 2014-11-19 | 华南理工大学 | New concept broadband circularly polarized antenna |
| CN105356053A (en) * | 2015-11-27 | 2016-02-24 | 华南理工大学 | Differential broadband dual-polarization base station antenna for improving cross polarization ratio |
| CN206225547U (en) * | 2016-09-27 | 2017-06-06 | 华南理工大学 | A kind of differential feed Broadband circularly polarized antenna |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493572A (en) * | 2018-02-28 | 2018-09-04 | 哈尔滨工程大学 | A kind of orientation circular polarized antenna based on bending T shape rotational structures |
| CN108448246A (en) * | 2018-05-21 | 2018-08-24 | 华南理工大学 | A kind of differential feed directional diagram reconstructable aerial |
| CN108448246B (en) * | 2018-05-21 | 2023-08-22 | 华南理工大学 | Differential feed pattern reconfigurable antenna |
| WO2020134448A1 (en) * | 2018-12-25 | 2020-07-02 | 瑞声声学科技(深圳)有限公司 | Antenna unit, antenna array, and base station |
| CN112332087A (en) * | 2020-10-29 | 2021-02-05 | 杭州电子科技大学 | Differential feed circular polarization filtering antenna based on super surface structure |
| CN112332087B (en) * | 2020-10-29 | 2022-05-27 | 杭州电子科技大学 | Differential feed circular polarization filtering antenna based on super surface structure |
| CN112421228A (en) * | 2020-11-25 | 2021-02-26 | 博微太赫兹信息科技有限公司 | Double-layer differential feed circularly polarized antenna |
| CN114665261A (en) * | 2020-12-22 | 2022-06-24 | 华为技术有限公司 | Antenna and communication equipment |
| CN114665260A (en) * | 2020-12-22 | 2022-06-24 | 华为技术有限公司 | Antenna and communication equipment |
| WO2022227128A1 (en) * | 2021-04-28 | 2022-11-03 | 领翌技术(横琴)有限公司 | Circularly polarized antenna |
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Application publication date: 20170104 |