CN206564329U - A kind of low section, broadband, high-gain, circular polarisation cross dipole antenna - Google Patents
A kind of low section, broadband, high-gain, circular polarisation cross dipole antenna Download PDFInfo
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- CN206564329U CN206564329U CN201621338934.7U CN201621338934U CN206564329U CN 206564329 U CN206564329 U CN 206564329U CN 201621338934 U CN201621338934 U CN 201621338934U CN 206564329 U CN206564329 U CN 206564329U
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- medium substrate
- gain
- antenna
- broadband
- circular polarisation
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Abstract
The utility model discloses a kind of low section, broadband, high-gain, circular polarisation cross dipole antenna.The antenna includes crossed dipoles radiant body, two layer medium substrate and irregular reflection plate.Described crossed dipoles radiant body is made up of the stepped rectangular patch and delay line phase positioned at upper layer medium substrate upper and lower surface, wherein delay line phase provides 90 ° of phase differences so as to form circular polarization radiation, and stepped rectangular patch can make the 3dB axles ratio of antenna generation double frequency（Axial Ratio, AR）Passband, and this two sections of axles can get up than passband fusion for the introducing of layer dielectric substrate so that antenna axial ratio bandwidth is significantly greatly increased, finally by the design of irregular reflection plate so that the gain of antenna is improved well.The utility model creatively designs stepped rectangular patch dipole, and antenna structure is simple, and complicated feed circuit, height only 0.13l is not used0, 10dB impedance bandwidths reach that 66.9%, 3dB axial ratio bandwidths reach in 55.1%, antenna passband that average gain is 10.4dBi.
Description
Technical field
The utility model is related to the antenna in wireless mobile communications field, more particularly to a kind of to can be applied to the low of mobile communication
Section, broadband, high-gain, circular polarisation cross dipole antenna.
Background technology
In recent years, cross dipole antenna is because its good circular polarization characteristics is so as to receiving significant attention.In order to meet
The need for modern wireless communication systems, various broadband cross dipole sub-antennas are proposed in succession.The technology of increase bandwidth mainly has
Two kinds：One is to utilize various parasitic elements, and two be to use wider plane dipole.The beamwidth of antenna obtained by these methods
It is wider, but their section is all higher.High profile antenna is not suitable for coplanar, and suffered windage is also bigger.In order to reduce
The height of antenna, people are using reflecting plate of the artificial magnetic conductor (AMC) as cross dipole antenna.But the now beamwidth of antenna
Often it is greatly reduced.
Therefore, how research realizes that broadband cross dipole sub-antenna has great importance under conditions of low section.
Utility model content
The utility model overcomes the shortcomings of prior art presence, and there is provided a kind of low section that can be applied to mobile communication, width
Band, high-gain, circular polarisation cross dipole antenna.
The technical scheme that the utility model is used is as follows.
A kind of low section, broadband, high-gain, circular polarisation cross dipole antenna, it includes first medium substrate, second Jie
Matter substrate, the crossed dipoles etched respectively in first medium substrate upper and lower surface, positioned at first medium substrate and second medium
Nylon support column between substrate, the reflecting plate in the etching of second medium base lower surface；Two crossed dipoles are by phase
Position delay line connects the stepped rectangular patch of two identicals and constituted, respectively positioned at first medium substrate upper and lower surface；It is stepped
Rectangular patch produces 90 ° of phase differences by delay line phase feed, so as to produce double frequency round polarized radiation；Second medium substrate position
Have the air gap below first medium substrate and between first medium substrate, and second medium substrate can make it is stepped
The double frequency axle that rectangular patch is produced connects to form broader axial ratio bandwidth than passband；Reflecting plate is located under second medium substrate
Surface, can improve the high-frequency gain of antenna, so that the gain in the whole passband of antenna is improved；Antenna directly uses coaxial cable
Feed.
Further, delay line phase is broken line or camber line, and its length l meets 1/4 λg-1/16λg<l<1/4λg+1/10
λg, wherein λgIt is the wavelength in center of antenna frequency correspondence microstrip line.
Further, stepped rectangular patch is made up of two various sizes of rectangles.
Further, four mutually isostructural stepped rectangular patches are according to the direction arrangement being continuously rotated by 90 °.
Further, connected between first medium substrate and second medium substrate by nylon support column, in
Nylon support column dimension (section radius/length of side) is bigger than two ends, and the height of center section can be according to first medium substrate and the
Chosen at interval between second medium substrate.
Further, the second medium substrate between first medium substrate and reflecting plate can be by two layers or more than two layers
Differing dielectric constant medium substrate replace.
Further, the reflecting plate of antenna is irregular shape.
Further, four angles of reflecting plate are stairstepping or grading profile (such as circular arc).
Further, the reflecting plate of antenna is obtained by removing identical ladder pattern on four angles of rectangular reflection plate
The shape arrived.
Further, positioned at first medium upper surface of base plate stepped rectangular patch and coaxial cable inner wire phase
Even, it is located at the outer conductor phase of the stepped rectangular patch and reflecting plate of first medium base lower surface then with coaxial cable
Even.
A kind of low section of the present utility model, broadband, high-gain, circular polarisation cross dipole antenna, described intersection are even
Extremely sub- radiant body is made up of the stepped rectangular patch and delay line phase on two surfaces above and below upper layer medium substrate, wherein
Delay line phase provides 90 ° of phase differences so as to produce circular polarization radiation, and stepped rectangular patch can make antenna produce double frequency
Axle compares passband；And the medium substrate of lower floor can get up double frequency axle so that the beamwidth of antenna is significantly greatly increased, finally than passband fusion
Then make it that gain of the antenna in passband is improved well by the design of irregular reflection plate.
Related published antenna utility model patent and utility model patent, all do not adopt and realize increase with the aforedescribed process
Bandwidth and the effect for improving gain.Compared with prior art, the utility model has the following advantages that and beneficial effect：
1. using the axle of stepped rectangular patch generation double frequency than passband, and by between reflecting plate and radiating element
Introducing medium substrate causes double frequency 3dB axles to be merged than passband, forms broadband circle polarized radiation；
2. obtain random scatters by removing same section metal in four corners of regular rectangular shape metallic reflection plate
Hardened structure, improves the entire gain in antenna passband；
3. described in circular polarisation cross dipole antenna the characteristics of there is low section, broadband, high-gain.Antenna whole height~
0.13 λ 0,10dB impedance bandwidths reach that 66.9%, 3dB axial ratio bandwidth reaches 55.1%, and individual antenna average gain is
10.4dBi。
Brief description of the drawings
Fig. 1 is the side view of the utility model circular polarisation cross dipole antenna specific embodiment；
Fig. 2 is the top view of the radiant body of the utility model circular polarisation cross dipole antenna specific embodiment；
Fig. 3 is the schematic diagram of the reflecting plate of the utility model circular polarisation cross dipole antenna specific embodiment；
Fig. 4 is the S of the utility model circular polarisation cross dipole antenna specific embodiment11The emulation of parameter and test curve
Figure；
Fig. 5 is that the axle of the utility model circular polarisation cross dipole antenna specific embodiment is more bent than the emulation and test of parameter
Line chart；
Fig. 6 is that the emulation and test of the gain parameter of the utility model circular polarisation cross dipole antenna specific embodiment are bent
Line chart；
Fig. 7 a~Fig. 7 c be respectively the utility model circular polarisation cross dipole antenna specific embodiment in 4.2GHz,
5.5GHz, 7.0GHz normalization antenna pattern.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, ins and outs of the present utility model are carried out clear, detailed
Most explanation, described embodiment is only the section Example in the utility model, rather than whole embodiments.Based on this
The embodiment of utility model, other realities that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example is applied, protection domain of the present utility model is belonged to.
A kind of low section of the utility model embodiment, broadband, high-gain, circular polarisation cross dipole antenna.Including first
Medium substrate 2, second medium substrate 4, the crossed dipoles 1 etched respectively in the upper and lower surface of first medium substrate 2, positioned at first
Nylon support column 3 between medium substrate 2 and second medium substrate 4, the reflecting plate 5 in the following table facet etch of second medium substrate 4；
Two crossed dipoles 1 are to connect the stepped rectangular patch 7 of two identicals by delay line phase 8 to constitute, respectively positioned at
The upper and lower surface of one medium substrate 2；Stepped rectangular patch 7 produces 90 ° of phase differences by the feed of delay line phase 8, so as to produce
Double frequency round polarized is radiated；Second medium substrate 4 is located at first medium substrate 2 below and had time between first medium substrate 2
Gas gap, and second medium substrate 4 can make the double frequency axle of the stepped generation of rectangular patch 7 connect to form wider than passband
Axial ratio bandwidth；Reflecting plate 5 is located at the lower surface of second medium substrate 4, can improve the high-frequency gain of antenna, so that antenna is whole
Gain in passband is improved；Antenna is directly fed using coaxial cable 6.It is logical between first medium substrate and second medium substrate
Cross what nylon support column 3 was connected.Stepped rectangular patch 7 and coaxial cable 6 positioned at the upper surface of first medium substrate 2
Inner wire be connected, and positioned at the lower surface of first medium substrate 2 stepped rectangular patch 7 and reflecting plate 5 then with coaxial cable 6
Outer conductor be connected.
Refering to Fig. 1, the side view of the present embodiment, the thickness h of first medium substrate 21=0.813mm (can use pcb board
RO4003), the thickness h of second medium substrate 42=3mm (can use copper coated foil plate F4T), antenna whole height~7.113mm,
Section is low.Refering to Fig. 2, the top view of the radiant body of the present embodiment, radiant body uses crossed dipoles 1, crossed dipoles 1 by
Stepped rectangular patch 7 and delay line phase 8 positioned at the upper and lower surface of upper strata first medium substrate 2 are constituted, wherein phase delay
Line 8 is to provide for 90 ° of phase differences so as to produce circular polarization radiation, and the stepped generation of rectangular patch 7 two is separated by near
Axle compares passband.The present embodiment obtains the size of an optimization:The size of big rectangle is 19mm × 13.8mm, and the size of small rectangle is
12.5mm×7.8mm。
Refering to Fig. 3, the reflecting plate 5 of the present embodiment, it is located at the lower surface of lower floor's second medium substrate 4.Reflecting plate 5 is not
It is traditional regular metal reflecting plate, but an irregular shape, it is by four angles of regular rectangular shape reflecting plate
Remove identical patterns and obtain.
Further optimal enforcement, regulation reflection board size further improves high-frequency gain, finally makes whole antenna logical
Gain in band is greatly improved.
Reference picture 4, the emulation of the utility model embodiment and test | S11| parameter is more coincide, and test result is in radio-frequency head
Dividing somewhat has frequency deviation, and this is caused by actual processing and experimental error.What the 10dB impedance bandwidths of test emulated for 66.9%
As a result it is 66.4%.Reference picture 5, the utility model embodiment emulation is more same than parameter more identical with the 3dB axles tested, test
3dB axial ratio bandwidths for 55.1% result emulated be 57.3%.And the axle of test is entirely located at impedance pass-band than passband
It is interior, therefore be available bandwidth.Reference picture 6, the emulation of the utility model embodiment is compared with the gain curve tested to coincide, test
Average gain is that 10.4dBi and 3-dB gain bandwidths are 53.6% in passband.Refering to Fig. 7 a~Fig. 7 c, three differences in passband
Frequency 4.2GHz, 5.5GHz, 7.0GHz normalization antenna pattern.As frequency increases, because higher mode excitation causes day
The secondary lobe increase of line, so that the wave beam of antenna narrows.But the greatest irradiation direction of antenna be maintained at radiant body just on
Side, this side up main polarization 15dBi more than bigger than cross polarization.
The utility model creatively designs stepped rectangular patch dipole, and antenna structure is simple, and complexity is not used
Feed circuit, height only 0.13 λ 0,10dB impedance bandwidths reach that 66.9%, 3dB axial ratio bandwidths are reached in 55.1%, antenna passband
Average gain is 10.4dBi
The embodiment that the utility model is provided is applied to wireless mobile communications field, can be applied to various types of wireless communication systems
Reception and transmitting equipment in, good circular polarisation performance can be obtained.
Claims (10)
1. a kind of low section, broadband, high-gain, circular polarisation cross dipole antenna, it is characterised in that including first medium substrate
（2）, second medium substrate（4）, in first medium substrate（2）The crossed dipoles that upper and lower surface is etched respectively（1）, positioned at first
Medium substrate（2）With second medium substrate（4）Between nylon support column（3）, in second medium substrate（4）Following table facet etch
Reflecting plate（5）；Two crossed dipoles（1）It is by delay line phase（8）Connect two stepped rectangular patches of identical（7）
Constitute, respectively positioned at first medium substrate（2）Upper and lower surface；Stepped rectangular patch（7）Pass through delay line phase（8）Feed production
Raw 90 ° of phase differences, so as to produce double frequency round polarized radiation；Second medium substrate（4）Positioned at first medium substrate（2）Below and
With first medium substrate（2）Between have the air gap, and second medium substrate（4）Stepped rectangular patch can be made（7）Produce
Double frequency axle connect to form broader axial ratio bandwidth than passband；Reflecting plate（5）Positioned at second medium substrate（4）Lower surface,
The high-frequency gain of antenna can be improved, so that the gain in the whole passband of antenna is improved；Antenna directly uses coaxial cable（6）Feedback
Electricity.
2. a kind of low section according to claim 1, broadband, high-gain, circular polarisation cross dipole antenna, its feature exist
In delay line phase（8）It is broken line or camber line, its lengthlMeet 1/4lg-1/16lg<l<1/4lg+1/10lg, wherein lgIt is day
Wavelength in line centre frequency correspondence microstrip line.
3. a kind of low section according to claim 1, broadband, high-gain, circular polarisation cross dipole antenna, its feature exist
In stepped rectangular patch（7）It is to be made up of two various sizes of rectangles.
4. a kind of low section according to claim 1, broadband, high-gain, circular polarisation cross dipole antenna, its feature exist
In four mutually isostructural stepped rectangular patches（7）It is according to the direction arrangement being continuously rotated by 90 °.
5. a kind of low section according to claim 1, broadband, high-gain, circular polarisation cross dipole antenna, its feature exist
In first medium substrate（2）With second medium substrate（4）Between be by nylon support column（3）Connect.
6. a kind of low section according to claim 1, broadband, high-gain, circular polarisation cross dipole antenna, its feature exist
In positioned at first medium substrate（2）And reflecting plate（5）Between second medium substrate（4）Can be by two layers or more than two layers not
Medium substrate with dielectric constant is replaced.
7. a kind of low section according to claim 1, broadband, high-gain, circular polarisation cross dipole antenna, its feature exist
In the reflecting plate of antenna（5）It is irregular shape.
8. a kind of low section according to claim 1, broadband, high-gain, circular polarisation cross dipole antenna, its feature exist
In reflecting plate（5）Four angles be stairstepping or grading profile.
9. a kind of low section according to claim 1, broadband, high-gain, circular polarisation cross dipole antenna, its feature exist
In the reflecting plate of antenna（5）It is shape obtained from by removing identical ladder pattern on four angles of rectangular reflection plate.
10. a kind of low section according to claim 1, broadband, high-gain, circular polarisation cross dipole antenna, its feature
It is, positioned at first medium substrate（2）The stepped rectangular patch of upper surface（7）With coaxial cable（6）Inner wire be connected, and
Positioned at first medium substrate（2）The stepped rectangular patch of lower surface（7）And reflecting plate（5）Then with coaxial cable（6）It is outer
Conductor is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621338934.7U CN206564329U (en) | 2016-12-08 | 2016-12-08 | A kind of low section, broadband, high-gain, circular polarisation cross dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621338934.7U CN206564329U (en) | 2016-12-08 | 2016-12-08 | A kind of low section, broadband, high-gain, circular polarisation cross dipole antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206564329U true CN206564329U (en) | 2017-10-17 |
Family
ID=60028641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621338934.7U Expired - Fee Related CN206564329U (en) | 2016-12-08 | 2016-12-08 | A kind of low section, broadband, high-gain, circular polarisation cross dipole antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206564329U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684543A (en) * | 2016-12-08 | 2017-05-17 | 华南理工大学 | Low-profile, bandwidth, circularly polarized cross-dipole antenna |
| CN113594715A (en) * | 2021-08-02 | 2021-11-02 | 北京星英联微波科技有限责任公司 | Dual-frequency bidirectional circularly polarized dipole array antenna |
| CN115810913A (en) * | 2022-04-29 | 2023-03-17 | 广州程星通信科技有限公司 | Dual-frequency electromagnetic band gap structure and array antenna |
-
2016
- 2016-12-08 CN CN201621338934.7U patent/CN206564329U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684543A (en) * | 2016-12-08 | 2017-05-17 | 华南理工大学 | Low-profile, bandwidth, circularly polarized cross-dipole antenna |
| CN106684543B (en) * | 2016-12-08 | 2024-03-08 | 华南理工大学 | Low-profile, broadband and circularly polarized cross dipole antenna |
| CN113594715A (en) * | 2021-08-02 | 2021-11-02 | 北京星英联微波科技有限责任公司 | Dual-frequency bidirectional circularly polarized dipole array antenna |
| CN115810913A (en) * | 2022-04-29 | 2023-03-17 | 广州程星通信科技有限公司 | Dual-frequency electromagnetic band gap structure and array antenna |
| CN115810913B (en) * | 2022-04-29 | 2023-06-13 | 广州程星通信科技有限公司 | Dual-frequency electromagnetic band gap structure and array antenna |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171017 Termination date: 20191208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |