CN105789846B - Circular polarized antenna and electronic equipment - Google Patents
Circular polarized antenna and electronic equipment Download PDFInfo
- Publication number
- CN105789846B CN105789846B CN201610285478.2A CN201610285478A CN105789846B CN 105789846 B CN105789846 B CN 105789846B CN 201610285478 A CN201610285478 A CN 201610285478A CN 105789846 B CN105789846 B CN 105789846B
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- branch
- antenna
- dipole antenna
- dipole
- circular polarized
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Classifications
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- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
- H01Q15/242—Polarisation converters
- H01Q15/244—Polarisation converters converting a linear polarised wave into a circular polarised wave
-
- 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
-
- 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
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
Abstract
The invention discloses a kind of circular polarized antenna and electronic equipments.The circular polarized antenna includes dipole antenna array and feeding network.In the aerial array, the first and second branches of each dipole antenna are radiation branch, and the third and fourth branch is feed branch；The feeding network includes the first and second feed branch, for providing the electric feed signal with 90 ° of phase differences, wherein the third branch of the first dipole antenna is connected with the first feed branch, the third branch of second dipole antenna is connected with the second feed branch, other antenna branch ground connection.Compared with prior art, the feed network structures of circular polarized antenna according to the present invention are simple.
Description
Technical field
The present invention relates to antenna technologies, more particularly, to a kind of circular polarized antenna and electronic equipment.
Background technique
In recent years, with the rapid development of wireless communication technique, the development of especially modern airmanship, so that circular polarisation
Antenna and the antenna that can support multiple frequency ranges are using more and more extensive.
Micro-strip paster antenna can be implemented more easily various polarization modes, it is widely used in circular polarized antenna design
In.However, the design of micro-strip paster antenna will receive limitation when micro-strip paster antenna is applied to multifrequency design.For example, working as
When realizing double frequency round polarized Antenna Design using the double-deck micro-strip paster antenna, the meeting between the micro-strip paster antenna of two frequency ranges
Generate biggish radiation interference.
In addition, when realizing circular polarized antenna using dipole antenna, since feeding network is relative complex, this
The characteristic of circular polarized antenna has been seriously affected, or has increased the complexity of Antenna Design.Thus, how for circular polarized antenna
Feeding network be designed and how to realize multiband, these technical problems have become the new technology problem in this field.
Therefore, it is necessary to be improved to the prior art, to solve at least one technical problem in the prior art.
Summary of the invention
It is an object of the present invention to provide a kind of new solutions for antenna assembly.
According to the first aspect of the invention, a kind of circular polarized antenna, including dipole antenna array and transmission network are provided
Network.The dipole antenna array includes the first dipole antenna, the second dipole antenna, third dipole antenna and the 4th
Dipole antenna, the first dipole antenna, the second dipole antenna, third dipole antenna and the 4th dipole antenna are along square
Four sides of shape are successively set, wherein each dipole antenna include the first, second, third and fourth branch, first and second
Branch is radiation branch, and the third and fourth branch is feed branch, and first is connected with third branch, second and the 4th branch's phase
Even.The feeding network includes the first and second feed branch, the first feed branch and the second feed branch for providing tool
There is the electric feed signal of 90 ° of phase differences, wherein the third branch of the first dipole antenna is connected with the first feed branch, and first is even
For being grounded, the third branch of the second dipole antenna is connected with the second feed branch for 4th branch of pole sub-antenna, and second is even
4th branch of pole sub-antenna is for being grounded, and the third and fourth branch of the third and fourth dipole antenna is for being grounded.
Preferably, the circular polarized antenna further includes reflection floor and paster antenna.
Seen from above preferably for the circular polarized antenna, paster antenna is arranged on dipole antenna array
Square range in and dipole antenna array be arranged on reflection floor in the range of.
Preferably for the circular polarized antenna, wherein dipole antenna array is located above reflection floor, and
Paster antenna is located above dipole antenna array.
Preferably for the circular polarized antenna, wherein paster antenna is the circle by corner cut or diagonal feed setting
Poliarizing antenna.
Preferably for the circular polarized antenna, wherein the first branch of each dipole antenna with third branch
Opposite one end is in U-shape and the second branch of each dipole antenna is in U-shape in one end opposite with the 4th branch.
Preferably for the circular polarized antenna, wherein the distance between first and third dipole antenna and second
The distance between 4th dipole antenna is the half of the wavelength of the signal of expected frequency.
Preferably for the circular polarized antenna, wherein the length of the length of the first feed branch and the second feed branch
The difference of degree is 1/4 wavelength of electric feed signal.
According to the second aspect of the invention, a kind of electronic equipment, including circular polarized antenna according to the present invention are provided.
Compared with prior art, the feeding network of circular polarized antenna according to the present invention is relatively easy.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the structural schematic diagram of circular polarized antenna according to an embodiment of the invention.
Fig. 2 is the schematic diagram of the feeding network of circular polarized antenna according to figure 1.
Fig. 3-6 is the schematic diagram of the antenna current distribution of out of phase.
Fig. 7 is the example graph of the S11 characteristic of circular polarized antenna according to an embodiment of the invention.
Fig. 8 is the example graph of the antenna axial ratio of circular polarized antenna according to an embodiment of the invention.
Fig. 9 is the schematic diagram of the antenna gain of circular polarized antenna according to an embodiment of the invention.
Figure 10 is the schematic diagram of the circular polarized antenna comprising paster antenna according to another embodiment of the invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
In the following, being described with reference to each embodiment according to the present invention and example.
Fig. 1 is the structural schematic diagram of circular polarized antenna according to an embodiment of the invention.Fig. 2 is according to Fig. 1
Circular polarized antenna feeding network schematic diagram.The circular polarized antenna includes dipole antenna array and feeding network.
As shown in Figure 1, the dipole antenna array includes the first dipole antenna 1, the second dipole antenna 2, third idol
Pole sub-antenna 3 and the 4th dipole antenna 4.First dipole antenna 1, the second dipole antenna 2,3 and of third dipole antenna
4th dipole antenna 4 is successively set along four sides of quadrangle (square).
For example, as shown in Figure 1, the distance between first and third dipole antenna 1,3 D and second and the 4th dipole
The distance between antenna 2,4 D is the half of the wavelength of the signal of expected frequency respectively.Pass through this setup, it is possible to reduce
Mutual coupling between dipole antenna array merges the gain for increasing antenna.
For example, herein, the first dipole antenna 1 and the second dipole antenna 2 are excitation radiation unit, third dipole
Antenna 3 and the 4th dipole antenna 4 are parasitic radiation elements.For example, four dipole antennas structure having the same, from
And form symmetrical structure.It optionally, according to actual needs, can also be to the size of at least one of four dipole antennas
It is adjusted.
As illustrated in fig. 1 and 2, in the dipole antenna array, each dipole antenna includes the first branch, second point
Branch, third branch and the 4th branch, the first and second branches are radiation branch, and the third and fourth branch is feed branch, first
Branch is connected with third, and second is connected with the 4th branch.
For example, with reference to Fig. 1, the first dipole antenna 1 includes the first branch 11, the second branch 12, third branch 13 and the
Four branches 14, wherein first is connected with third branch 11,13, and second is connected with the 4th branch 12,14.Second dipole antenna 2
Including the first branch 21, the second branch 22, third branch 23 and the 4th branch 24, wherein first and third branch 21,23 phases
Even, second is connected with the 4th branch 22,24.Third dipole antenna 3 includes the first branch 31, the second branch 32, third branch
33 and the 4th branch 34, wherein first is connected with third branch 31,33, and second is connected with the 4th branch 32,34.4th dipole
Sub-antenna 4 includes the first branch 41, the second branch 42, third branch 43 and the 4th branch 44, wherein first and third branch
41,43 are connected, and second is connected with the 4th branch 42,44.
For example, as shown in Figure 1, 2, the first branch of each dipole antenna is in U-shape in one end opposite with third branch,
And the second branch of each dipole antenna is in U-shape in one end opposite with the 4th branch.It is designed by this structure, it can be with
Reduce the area of antenna.
As shown in Fig. 2, the feeding network includes the first feed branch 51 and the second feed branch 52.First feed branch
51 and second feed branch 52 be used for provides have 90 ° of phase differences electric feed signal.
In the example in figure 2, the first feed branch 51 and the second feed branch 52 are connected to feed by feed branch 53
Point 54.For example, the difference of the length of the first feed branch 51 and the length of the second feed branch 52 is 1/4 wavelength of electric feed signal,
To divide in the first feed respectively when signal is provided to the first dipole antenna 1 and the second dipole antenna 2 by them
The end of branch 51 and the second feed branch 52 generates two electric feed signals with 90 ° of phase differences.For example, in Fig. 2, the first feedback
Electric branch 51 is 0 ° of phase branch, and the second feed branch 52 is 90 ° of phase branch.
As shown in Fig. 2, the third branch 13 of the first dipole antenna 1 is connected with the first feed branch 51.First dipole
4th branch 14 of antenna 1 is for being grounded.The third branch 23 of second dipole antenna 2 is connected with the second feed branch 52.The
4th branch 24 of two dipole antennas 2 is for being grounded.Third and fourth branch of the third and fourth dipole antenna is for connecing
Ground.
Fig. 3-6 is the schematic diagram that the circular polarized antenna in Fig. 1 is distributed in the antenna current of out of phase.Fig. 3-6 shows respectively
The antenna current distribution at 0 °, 90 °, 180 ° and 270 ° is gone out.Fig. 3-6 only schematically shows antenna current distribution
Variation, and not as any limitation of the invention.
As shown in Figures 3 and 5, for antenna in the case where 0 ° and 180 °, antenna current distribution is similar.As shown in figs. 4 and 6, exist
In the case where 90 ° and 270 °, antenna current distribution is similar.Circular polarized antenna according to the present invention is using excitation radiation and parasitic spoke
The mode that combines is penetrated to realize circularly polarised wave.For example, when feed point phase is 0 °, the first dipole antenna 1 and the second dipole
Sub-antenna 2 is generated radiation (parasitic radiation) by indirect excitation.When feed point phase is 90 °, the first dipole antenna 1 and second
Dipole antenna 2 is generated radiation by directly excitation.Radiation event class when feed point phase is 180 °, when radiation event is with 0 °
Seemingly.When feed point phase is 270 °, radiation event when radiation event is with 90 ° is similar.In this way, circular polarisation day is realized
Line.
Fig. 7-9 show Fig. 1,2 circular polarized antenna an example various characteristics schematic diagram.Showing in Fig. 7-9
Intention is used only for circular polarized antenna effect in the cards, and not as any limitation of the invention.
Fig. 7 is the example graph of the S11 characteristic of the example of circular polarized antenna.As seen from Figure 7, according to the present invention
The circular polarized antenna of embodiment realizes good frequency bandwidth, and has preferable impedance matching near about 1.575GHz
Characteristic.
Fig. 8 is the example graph of antenna axial ratio of the circular polarized antenna at 1.575GHz as an example.Such as Fig. 8 institute
Show, when θ=0 °, phaseWith θ=0 °, phaseWhen, preferable circular polarisation has may be implemented than being about 4.7dB in axis
Characteristic, wherein θ is the angle in spherical coordinate system with Z-direction,To have been gone to counterclockwise from the point of view of positive Z axis from x-axis
To the angle of line segment.This circular polarization characteristics can meet general antenna performance requirement in engineering.
Fig. 9 is the schematic diagram of antenna gain of the circular polarized antenna at 1.575GHz as an example.In this example,
The gain of circular polarized antenna can achieve 3dB.
In the prior art, the electric feed signal that circular polarized antenna usually requires 0 °, 90 °, 180 ° and 270 ° four phase is come
Generate circularly polarised wave.In addition, in the prior art, the phase of four antennas needs sequentially, and between each phase
Phase difference (90 °) accurately just must be able to achieve preferable circular polarization characteristics；Otherwise, the axis of generated circularly polarised wave is more anxious than meeting
Play deteriorates.In the present embodiment, the similitude of antenna current is utilized, entelechy is realized using the feeding classification of 90 ° of phase differences
Change characteristic.
In the present embodiment, aerial array is formed using four dipole antennas, wherein only present two dipole antennas
Electric and other two dipole antenna is as parasitic element, to generate circularly polarised wave.Herein, pass through parasitic radiation and excitation
Radiation combines to generate aerial radiation.Circular polarization radiation characteristic is realized using dipole antenna array, this is also greatly reduced
Antenna Design space.Antenna gain can be improved using parasitic dipoles antenna element and reduce the axis ratio of circularly polarised wave.In addition,
In this embodiment, it is only necessary to 0 ° and 90 ° of feeding network.This design is simple, it is possible to reduce 60% feeding network area.
Figure 10 is the schematic diagram of the circular polarized antenna according to an embodiment of the invention comprising paster antenna.At this
In embodiment, multiple resonance frequencies can be realized by dipole antenna array and paster antenna.
As shown in Figure 10, the circular polarized antenna further includes reflection floor 100 and paster antenna 60.For the entelechy
Change antenna, seen from above, paster antenna 60 is arranged in the square range of dipole antenna array and dipole day
Linear array is arranged in the range of reflection floor 100.
In one example, the paster antenna is located among dipole antenna array.In this way, can make to paste
Chip antenna is isolated with dipole antenna array, to reduce interfering with each other between two frequency ranges of two antennas.In addition, dipole
Sub-antenna battle array and paster antenna are designed using the structure on public reflection floor, it is possible to reduce the area of antenna.
In another example, the size for reflecting floor 100 is greater than the size for the dipole antenna array arranged on it,
To obtain higher gain.
In another example, for the circular polarized antenna, paster antenna 60 is set by corner cut or diagonal feed
The circular polarized antenna set.For example, paster antenna 60 can be the conductor piece handled by corner cut, to generate circularly polarised wave.It can be with
Its circular polarization characteristics is adjusted by adjusting the size of the corner cut of paster antenna.It can be changed by adjusting the side length of paster antenna
Become resonance frequency.The circular polarized antenna realized in this way can have preferable double frequency round polarized characteristic.For example, patch
The resonance frequency of antenna is 5.775GHz-5.845GHz.
In the present embodiment, for the circular polarized antenna, wherein dipole antenna array is located at reflection floor 100
Top and paster antenna 60 be located above dipole antenna array.It will be understood by those of skill in the art that here
" top " is referred to when circular polarized antenna is horizontally arranged, the relative position of top antenna and lower section antenna.Use this term
It is the needs in order to be described in the description, in actual use, can according to need and the circle is placed with any posture
Poliarizing antenna.
Compared with prior art, the antenna structure of this bilayer interferes with each other smaller, and preferable antenna performance may be implemented.
It can include in the electronic device, to realize that preferable wireless communication is special by circular polarized antenna according to the present invention
Property.The electronic equipment can be mobile phone, vehicle-mounted GPS equipment of integrated electronic charging system etc..
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (9)
1. a kind of circular polarized antenna, including dipole antenna array and feeding network,
Wherein, which includes the first dipole antenna (1), the second dipole antenna (2), third dipole day
Line (3) and the 4th dipole antenna (4), the first dipole antenna (1), the second dipole antenna (2), third dipole antenna
(3) and the 4th dipole antenna (4) structure having the same and along square four sides be successively set,
Wherein, each dipole antenna includes first (11；21；31；41), second (12；22；32；42), third (13；23；33；
And the 4th branch (14 43)；24；34；44), first (11；21；31；And the second branch (12 41)；22；32；It 42) is radiation point
Branch, third (13；23；33；And the 4th branch (14 43)；24；34；It 44) is feed branch, first is connected with third branch, and second
Be connected with the 4th branch, wherein feeding network include first (51) and the second feed branch (52), the first feed branch (51) and
Second feed branch (52) is used to provide the electric feed signal with 90 ° of phase differences,
Wherein, the third branch (13) of the first dipole antenna is connected with the first feed branch (51), the first dipole antenna
For being grounded, the third branch (23) of the second dipole antenna is connected with the second feed branch (52) for 4th branch (14), and second
4th branch (24) of dipole antenna is for being grounded, the third (33 of the third and fourth dipole antenna；And the 4th branch 43)
(34；44) for being grounded.
2. circular polarized antenna according to claim 1 further includes reflection floor (100) and paster antenna (60).
3. circular polarized antenna according to claim 2, wherein seen from above, paster antenna (60) is arranged on dipole
In the square range of sub-antenna array and dipole antenna array is arranged in the range of reflection floor (100).
4. circular polarized antenna according to claim 2, wherein dipole antenna array is located above reflection floor (100),
And paster antenna (60) is located above dipole antenna array.
5. circular polarized antenna according to claim 2, wherein paster antenna (60) is by corner cut or diagonal feed setting
Circular polarized antenna.
6. circular polarized antenna according to claim 1, wherein the first branch (11 of each dipole antenna；21；31；
41) with third branch (13；23；33；43) opposite one end is in U-shape and the second branch (12 of each dipole antenna；
22；32；42) with the 4th branch (14；24；34；44) opposite one end is in U-shape.
7. circular polarized antenna according to claim 1, wherein the first dipole antenna (1) and third dipole antenna (3)
The distance between and the distance between the second dipole antenna (2) and the 4th dipole antenna (4) (D) be expected frequency
The half of the wavelength of signal.
8. circular polarized antenna according to claim 1, wherein the length and the second feed branch of the first feed branch (51)
(52) difference of length is 1/4 wavelength of electric feed signal.
9. a kind of electronic equipment, including circular polarized antenna according to claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610285478.2A CN105789846B (en) | 2016-04-29 | 2016-04-29 | Circular polarized antenna and electronic equipment |
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| CN201610285478.2A CN105789846B (en) | 2016-04-29 | 2016-04-29 | Circular polarized antenna and electronic equipment |
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| CN105789846A CN105789846A (en) | 2016-07-20 |
| CN105789846B true CN105789846B (en) | 2018-12-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910634B (en) * | 2017-10-30 | 2019-10-11 | 西南交通大学 | A kind of dipole dual polarized antenna applied to 2G/3G/4G base station communication |
| DE102019107258A1 (en) * | 2018-05-24 | 2019-11-28 | Samsung Electronics Co., Ltd. | PHASED ARRAY ANTENNA MODULE AND COMMUNICATION DEVICE WITH THE SAME |
| CN109768383B (en) * | 2019-01-18 | 2021-04-27 | 西安电子科技大学 | Circularly polarized antenna based on double-layer artificial surface plasmon transmission line phase shifting |
| CN113328255B (en) * | 2021-05-10 | 2022-05-03 | 电子科技大学 | Low-profile dual-port high-isolation dual-circularly-polarized antenna array |
| CN113889755B (en) * | 2021-10-15 | 2022-07-29 | 电子科技大学 | Method for resolving axial ratio of tilted dipole antenna array by analysis |
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| US5661494A (en) * | 1995-03-24 | 1997-08-26 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | High performance circularly polarized microstrip antenna |
| US6356242B1 (en) * | 2000-01-27 | 2002-03-12 | George Ploussios | Crossed bent monopole doublets |
| CN201256184Y (en) * | 2008-08-25 | 2009-06-10 | 中兴通讯股份有限公司 | Near-far-field antenna |
| CN204243180U (en) * | 2014-12-11 | 2015-04-01 | 公安部第一研究所 | A kind of circular polarized antenna of horizontal omnidirectional radiation |
| CN205752517U (en) * | 2016-04-29 | 2016-11-30 | 歌尔股份有限公司 | Circular polarized antenna and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5661494A (en) * | 1995-03-24 | 1997-08-26 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | High performance circularly polarized microstrip antenna |
| US6356242B1 (en) * | 2000-01-27 | 2002-03-12 | George Ploussios | Crossed bent monopole doublets |
| CN201256184Y (en) * | 2008-08-25 | 2009-06-10 | 中兴通讯股份有限公司 | Near-far-field antenna |
| CN204243180U (en) * | 2014-12-11 | 2015-04-01 | 公安部第一研究所 | A kind of circular polarized antenna of horizontal omnidirectional radiation |
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