CN109301489A - A kind of low section high-isolation differential bipolar slot antenna applied to 5G communication - Google Patents
A kind of low section high-isolation differential bipolar slot antenna applied to 5G communication Download PDFInfo
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- CN109301489A CN109301489A CN201811038820.4A CN201811038820A CN109301489A CN 109301489 A CN109301489 A CN 109301489A CN 201811038820 A CN201811038820 A CN 201811038820A CN 109301489 A CN109301489 A CN 109301489A
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- slab
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
-
- 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
- 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
- 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
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- 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
- H01Q15/14—Reflecting surfaces; Equivalent structures
Abstract
The present invention provides a kind of low section high-isolation dual-band and dual-polarization slot antennas based on AMC applied to 5G communication, including reflecting floor and the first medium plate of reflection floor overcentre being arranged in, second medium plate, reflection is additionally provided with third dielectric-slab below floor, dipole is posted on the first medium plate, this antenna further includes Artificial magnetic conductor structure, by the circular ring shape copper sheet in second medium plate and surface periodic arrangement thereon, the square copper sheet of third medium and its upper surface, with second, air chamber composition between third dielectric-slab, the upper surface of second medium plate is artificial magnetic conductor surface, it is made of 64 circular ring shape copper sheets of periodic arrangement.The antenna that the present invention designs realizes antenna broadband character, and two port bandwidths of antenna are covered each by 3.28-5.31GHz (47.3%), and 3.29-5.32GHz (47.2%) can be applied to 5G microwave communication.It realizes high-isolation and low-cross polarization performance simultaneously, by differential feed network, realizes the high-gain aerial array of 1*4.
Description
[technical field]
The invention belongs to fields of communication technology, and in particular to a kind of low section high-isolation difference applied to 5G communication is double
Polarize slot antenna and its array.
[background technique]
In Modern Mobile Communications Systems, dual polarized antenna is concerned.On the one hand, using dual-polarization technique, antenna energy
Enough widen its channel capacity；On the other hand, dual polarized antenna can effectively reduce multipath fading effect.
With mobile communication technology fast development, wireless communication system requires antenna performance higher and higher.In order to meet
The demand of wireless communication system, researcher have put into a large amount of energy in the design and research and development of dual polarized antenna.But existing rank
Section, the development of dual polarized antenna are still faced with many needs problem in the urgent need to address.On the one hand, dual polarized antenna is small-sized
Change aspect and faces many problems；On the other hand, dual polarized antenna also faces many difficulties in this problem of interport isolation.
Currently, dual polarized antenna mainly includes three types, including paster antenna, electromagnetic dipole antenna and dipole
Antenna.Wherein, paster antenna can use the feed structures such as F type, double L-shaped probe and realize broadband, but this kind of antennas face
Antenna structure is complicated, is highly difficult to decrease and radiates unstable problem.Electromagnetic dipole antenna has broadband and stabilization
Radiance characteristic, but this kind of antenna all has complicated structure, and is faced with the huge problem of antenna volume.Dipole
Sub-antenna can then use relatively simple structure to realize broadband character, but the problem of be difficult to decrease there are still antenna height.
Using artificial magnetic conductor (AMC), the section of dipole antenna can be effectively reduced.But at this stage, based on the low of AMC technology
Profile antenna faces the problem that impedance bandwidth is narrow and radiation is unstable.
Difference channel has good noise robustness, plays an important role in a communications system.But it is traditional
Only one feed port of dual polarized antenna cannot directly use difference channel, and need using balanced-unbalanced transformer or
Other switching devices of person can use difference channel to connect with communication system.But this way will increase additional power damage
Consumption, while making structure is complicated to change.
[summary of the invention]
For disadvantages mentioned above, the present invention to carried out on the basis of existing dual polarized antenna redesign and to existing day
Linearly can be carried out and be obviously improved, provide a kind of low section high-isolation differential bipolar slot antenna applied to 5G communication and
Its aerial array.
Technical scheme is as follows:
It is a kind of applied to 5G communication low section high-isolation differential bipolar slot antenna, including by periodic arrangement just
The reflection floor of rectangular copper sheet composition and first medium plate, the second medium plate that reflection floor overcentre is set, reflection
Third dielectric-slab is additionally provided with below floor, posts dipole on the first medium plate, dipole is by coaxial line power supply, the
One dielectric-slab, second medium plate, third dielectric-slab are equipped with the hole passed through for coaxial line, further include Artificial magnetic conductor structure, should
The applied Artificial magnetic conductor structure of antenna by second medium plate and the circular ring shape copper sheet of second medium plate upper surface periodic arrangement,
It is formed between third dielectric-slab and the square copper sheet and second, third dielectric-slab of third dielectric-slab upper surface periodic arrangement
Air chamber composition.
Further, round copper sheet conduct of the dipole by " ten " font microstrip line as feed structure, with gap
Radiation patch is arranged on first medium plate；
Further, the upper surface of first medium plate is arranged in " ten " font microstrip line, and end passes through coaxial line respectively
It is connect with feed port.
Further, the lower surface of first medium plate, the circle are arranged in as radiation patch for the round copper sheet with gap
The gap of shape copper sheet is " ten " font, and " ten " font gap end is connected by curved microstrip line.
Further, the center of " ten " font microstrip line and round copper sheet is in same upright position, " ten " font micro-strip
The four direction that line extends with " ten " the font gap on round copper sheet is staggered with 45 ° of center rotation steps.
Further, the upper surface of second medium plate is artificial magnetic conductor surface, and the artificial magnetic conductor surface is by the period
Property arrangement 64 circular ring shape copper sheets constitute.
Further, the dielectric-slab is F4B high frequency laminate.
Another aspect of the present invention provides a kind of low section high-isolation differential bipolar gap day applied to 5G communication
Linear array is arranged in a linear comprising four above-mentioned antenna elements, four antenna elements by differential feed network power supply,
The differential feed network is made of two one point of eight differential feed structures, and each differential feed structure is by seven T-type power splitters
And eight phase shifter compositions.
Further, four antenna elements share reflection floor and Artificial magnetic conductor structure.
The present invention has the advantage that realizing the miniaturization of broadband dual polarized antenna, dual polarized antenna high-isolation is realized,
The performance of low-cross polarization, while simplifying the structure of dual polarized antenna, realize that high-gain aerial is added.
[Detailed description of the invention]
Fig. 1 is inventive antenna unit three-dimensional figure.
Fig. 2 is inventive antenna unit first medium plate upper surface.
Fig. 3 is inventive antenna unit first medium plate lower surface.
Fig. 4 is inventive antenna artificial magnetic conductor surface.
Fig. 5 is inventive antenna artificial magnetic conductor cellular construction.
Fig. 6 is inventive antenna artificial magnetic conductor unit partial structurtes enlarged drawing.
Fig. 7 is inventive antenna array differential feed network.
Fig. 8 is inventive antenna array three-dimensional figure.
Fig. 9 is that inventive antenna aerial array emulates standing wave when gain.
Figure 10 is inventive antenna unit interport isolation.
Figure 11 is the 3.5GHz directional diagram of inventive antenna matrix ports I.
Figure 12 is the 4.9GHz directional diagram of inventive antenna matrix ports I.
Figure 13 is the 3.5GHz directional diagram of inventive antenna matrix ports II.
Figure 14 is the 4.9GHz directional diagram of inventive antenna matrix ports II.
Figure 15 is inventive antenna array artificial magnetic conductor (AMC) reflected phase figure.
Figure 16 is inventive antenna array gain.
Wherein 1 is first medium plate, and 2 be second medium plate, and 3 be third dielectric-slab, and 4 are square copper sheet, and 11 be " ten "
Font microstrip line, 12 be feed probes, and 13 be radiation patch, and 14 be " ten " font gap, and 21 be circular ring shape copper sheet, and 22 be coaxial
The hole that line passes through, 23 be artificial magnetic conductor unit, and 24 be air chamber.
[specific embodiment]
In order to which the technological means for realizing the present invention is clear, the present invention is further explained with reference to the accompanying drawing, wherein
Term " first ", " second ", " third " etc. be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or
Implicitly indicate the quantity of indicated technical characteristic.It should be noted that if occur term " center ", "upper", "lower", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "inner", "outside" is orientation based on the figure or position
Relationship or the product using when the orientation or positional relationship usually put, be merely for convenience of the description present invention and simplify
Description, rather than the device or element of indication or suggestion meaning must have a particular orientation, constructed and grasped with specific orientation
Make, therefore is not considered as limiting the invention.
Embodiment
The low section high-isolation dual-band and dual-polarization slot antenna based on AMC for being applied to 5G communication as shown in Figure 1, packet
It includes the reflection floor being made of the square copper sheet 4 of periodic arrangement and the first medium plate of reflection floor overcentre is set
1, second medium plate 2 is equipped with third dielectric-slab 3 below reflection floor, posts dipole, dipole on the first medium plate 1
Son is powered by coaxial line, and the hole passed through for coaxial line is equipped on first medium plate, second medium plate, third dielectric-slab
22；Dipole on the first medium plate 1 is pasted by " ten " font microstrip line 11, the circular radiation with " ten " font gap 14
Piece 13 forms, and " ten " the font gap end of the radiation patch 13 is connected by curved elongated microstrip line.
As shown in Fig. 2, being 1 upper surface of inventive antenna unit first medium plate, the setting of " ten " font microstrip line 11 is the
The upper surface of one dielectric-slab 1, end pass through the connection feed of coaxial feed probe 12 respectively, and the port in diagram is four, and four
A port is matched two-by-two, and the port of pairing carries out differential transfer to the same signal.
As shown in figure 3, being 1 lower surface of inventive antenna unit first medium plate, the circle in " ten " font gap 14 is had
The lower surface of first medium plate 1 is arranged in radiation patch 13, and the diameter of circular radiation patch is 40mm, " ten " font gap width
For 3.7mm, the length of each section of microstrip line in gap end is 8.0mm, width 0.8mm.In order to simplify the structure of antenna, keep
The characteristic of antenna miniaturization, while antenna being allowed to cover wider frequency band, " ten " the font line of rabbet joint of the present invention in aerial radiation patch
End connected using curved elongated microstrip line, the curved elongated microstrip line can be equivalent to the inductance component in circuit.
Effective current length can be extended by doing so, so that the size of radiation patch is reduced, while can also be realized wider
Impedance bandwidth, realize the wide band characteristic of antenna.
In conjunction with the perspective view of Fig. 1 and the hardened structure of the first medium of Fig. 2, Fig. 3, " ten " font microstrip line with have
The center of the round copper sheet 13 in " ten " font gap 14 is in same upright position, on " ten " font microstrip line and round copper sheet
The four direction that " ten " font gap extends is staggered with 45 ° of center rotation steps, clever structure.
Inventive antenna unit artificial magnetic conductor surface as shown in Figure 4 is only shown as a part of artificial magnetic conductor
The circular ring shape copper sheet 21 of second medium plate 2 and periodic arrangement, wherein the upper surface of second medium plate 2 is artificial magnetic conductor table
Face, the artificial magnetic conductor surface are made of the circular ring shape copper sheet 21 of periodic arrangement, and circular ring shape copper sheet 21 shares 64, phase
Corresponding reflection floor is also made of periodic arrangement 64 square copper sheets 4, the number of circular ring shape copper sheet 21 and square copper sheet 4
Amount corresponds, and is hollow among circular ring shape copper sheet.
Fig. 5 be specific 23 schematic diagram of Artificial magnetic conductor structure, by second medium plate 2 and thereon surface periodic arrange
The circular ring shape copper sheet 21 of column, the square copper sheet 4 of third dielectric-slab 3 and upper surface periodic arrangement and second medium plate 2 with
Air chamber 24 between third dielectric-slab 3 forms.The size of the circular ring shape copper sheet on surface are as follows: big circular diameter is 11mm,
The hollow circular diameter of the inside is 2.2mm.It is by Artificial magnetic conductor structure unit periodic arrangement, square copper sheet when use
4 connect together, and just constitute and reflect floor shown in the inside Fig. 1, due to the presence of mirror image theorem, perfect electric conductor surface enters
Ejected wave and back wave at 180 degree phase difference so that it is necessary for λ/4 at a distance from antenna.If too close, the metal covering shape of distance
At image current and dipole reverse phase, will seriously affect the radiation of antenna, so it is vertical to be unfavorable for antenna using metal mirror
Diminution to size.The Artificial magnetic conductor structure (AMC) that the present invention uses has with phase reflection characteristic, the i.e. incidence wave on its surface
Consistent with reflection wave phase, therefore, the distance between antenna can be very close, to effectively reduce wave-path, reduces antenna
Longitudinal size.
Another aspect of the present invention provides a kind of low section high-isolation differential bipolar slot antenna array, such as Fig. 8 institute
Show, comprising four above-mentioned antenna elements, be arranged in a linear, four antenna elements are by differential feed network power supply, such as Fig. 7
The shown differential feed network is made of two one point of eight differential feed structures, and each differential feed structure is by seven T-type function
Device and eight phase shifters compositions, four antenna elements is divided to share reflection floor and Artificial magnetic conductor structure.
The port I of Fig. 7 and and port II be four antenna elements composition aerial array feed port, the structure
For aerial array only there are two input port, each input signal is 180 degree by generating four phase differences after feeding network
Differential signal be transmitted to four antennas inside array respectively, the input signal to four antennas is the same.As shown in Fig. 2,
Individual antenna has 4 ports, and four ports are matched two-by-two, and the port of pairing carries out differential transfer to the same signal.
In order to meet the needs of present mobile communication is to isolation between antennas, invention applies differential feed technologies, directly
It using differential feed structure, substantially increases the isolation of antenna while reducing its cross polarization, while avoiding general double
When poliarizing antenna uses differential feed technology using balanced-to-unblanced transformer or other switching devices bring power
Loss.To realize high-isolation and low-cross polarization.
Figure 11 is I 3.5GHz directional diagram of inventive antenna matrix ports.
Figure 12 is I 4.9GHz directional diagram of inventive antenna matrix ports.
Figure 13 is II 3.5GHz directional diagram of inventive antenna matrix ports.
Figure 14 is II 4.9GHz directional diagram of inventive antenna matrix ports.
Figure 11-14 as can be seen that cross polarization of the cross polarization in 5G communications band of inventive antenna array be less than-
32dB, front and back are compared greater than 15dB.
Figure 15 is inventive antenna array AMC reflected phase figure.Generally, it is considered that the reflected phase of artificial magnetic conductor is ± 90
Frequency range within degree is with phase reflecting region, i.e. the reflected phase band gap of artificial magnetic conductor.This of artificial magnetic conductor is special
Property can make the incidence wave on its surface with reflection wave phase it is consistent, to substantially reduce the longitudinal size of antenna.Figure 15 illustrates this
The reflected phase band gap of the artificial magnetic conductor of invention is 2.96-5.13GHz, covers 5G communications band.
On the whole, antenna of the invention has a characteristic that
1, present invention utilizes Artificial magnetic conductor structures to shorten wave path-difference, to effectively reduce the height of antenna；Simultaneously
It is connected in the curved microstrip line of radiation patch slot edge, so that the miniaturization of antenna is realized, inventive antenna miniaturization
Size be 40mm*40mm*9.5mm, about 0.56 λC*0.56λC*0.13λC。
2, the present invention realizes the wideband of antenna using connecting in the curved microstrip line of aerial radiation patch slot edge
Band characteristic, as shown in figure 9, differential bipolar slot antenna emulation standing wave when gain through the invention, two of aerial array
Port bandwidth is covered each by 3.28-5.31GHz (47.3%), 3.29-5.32GHz (47.2%), and it is logical to can be applied to 5G microwave
Letter.
3, the present invention uses differential feed technology, and avoiding while realizing antenna high-isolation and low-cross polarization makes
With balanced-to-unblanced transformer or other switching device bring power losses, with the bright structure for simplifying antenna.Such as figure
Shown in 10, the isolation of inventive antenna array is lower than -37dB, and cross polarization is lower than -32dB, realizes the high-isolation of antenna
And low-cross polarization performance.
4, shown in Figure 16, inventive antenna array gain designs 1*4 aerial array by using differential feed network, real
The high gain characteristics of existing antenna, the average gain of inventive antenna array low frequency part are 21dBi, the average gain of high frequency section
For 19dBi.
All technical solutions for belonging to the principle of the invention all belong to the scope of protection of the present invention.For those skilled in the art
For member, several improvement carried out without departing from the principles of the present invention, these improvement also should be regarded as guarantor of the invention
Protect range.
Claims (9)
1. a kind of low section dual-band dual-polarized antenna based on AMC applied to 5G communication, which is characterized in that including being arranged by the period
The reflection floor of the square copper sheet composition of column and first medium plate, the second medium that reflection floor overcentre is set
Plate, reflection are additionally provided with third dielectric-slab below floor, and dipole is posted on the first medium plate, and dipole is supplied by coaxial line
Electricity is equipped with the hole passed through for coaxial line on first medium plate, second medium plate, third dielectric-slab, further includes artificial magnetic conductor
Structure, the applied Artificial magnetic conductor structure of the antenna is by second medium plate and the annulus of second medium plate upper surface periodic arrangement
Shape copper sheet, the square copper sheet and second, third dielectric-slab of third dielectric-slab and third dielectric-slab upper surface periodic arrangement it
Between formed air chamber composition.
2. antenna according to claim 1, which is characterized in that the dipole is by " ten " font microstrip line as feed knot
Structure, the round copper sheet with gap are formed as radiation patch, and are arranged on first medium plate.
3. antenna according to claim 2, which is characterized in that the upper table of first medium plate is arranged in " ten " font microstrip line
Face, end pass through coaxial line respectively and connect with feed port.
4. antenna according to claim 2, which is characterized in that the round copper sheet with gap is arranged as radiation patch the
The gap of the lower surface of one dielectric-slab, the circle copper sheet is " ten " font, and " ten " font gap end is by curved micro-strip
Line connection.
5. antenna according to claim 2, which is characterized in that the center of " ten " font microstrip line and round copper sheet is in same
One upright position, between the four direction that " ten " the font gap on " ten " font microstrip line and round copper sheet extends is rotated with center
It is staggered every 45 °.
6. antenna according to claim 1, which is characterized in that the upper surface of second medium plate is artificial magnetic conductor surface,
The artificial magnetic conductor surface is 64 circular ring shape copper sheets of periodic arrangement.
7. antenna according to claim 1, which is characterized in that first, second, third dielectric-slab is F4B high frequency Jie
Scutum.
8. a kind of low section high-isolation differential bipolar slot antenna array, which is characterized in that comprising as described in claim 1
Antenna element four, be arranged in a linear, four antenna elements are by differential feed network power supply, the differential feed network
It is made of two one point of eight differential feed structures, each differential feed structure is by seven T-type power splitters and eight phase shifter groups
At.
9. a kind of low section high-isolation differential bipolar slot antenna array according to claim 8, which is characterized in that
Four antenna elements share reflection floor and Artificial magnetic conductor structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038820.4A CN109301489B (en) | 2018-09-06 | 2018-09-06 | Low-profile high-isolation differential dual-polarized slot antenna applied to 5G communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038820.4A CN109301489B (en) | 2018-09-06 | 2018-09-06 | Low-profile high-isolation differential dual-polarized slot antenna applied to 5G communication |
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| CN109301489B CN109301489B (en) | 2020-05-08 |
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| CN110148829A (en) * | 2019-03-29 | 2019-08-20 | 西安电子科技大学 | A kind of broadband low section dual polarization cross dipole antenna based on the side annular surface AMC |
| CN110212278A (en) * | 2019-06-19 | 2019-09-06 | 南京邮电大学 | A kind of millimeter wave one based on artificial magnetic conductor divides four microstrip power dividers |
| CN110504535A (en) * | 2019-08-07 | 2019-11-26 | 上海交通大学 | Dual polarization characteristics of conformal micro-strip magnon Yagi spark gap endfire array antenna |
| CN110534890A (en) * | 2019-09-07 | 2019-12-03 | 电子科技大学 | The super skin antenna of low section dual polarization |
| CN112701497A (en) * | 2020-12-23 | 2021-04-23 | 北京邮电大学 | Low-profile shared-aperture dual-circular-polarization orbital angular momentum state multiplexing antenna |
| CN114374092A (en) * | 2021-12-23 | 2022-04-19 | 西安电子科技大学 | Broadband low-profile miniaturized AMC cavity monopole antenna |
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| CN114374092A (en) * | 2021-12-23 | 2022-04-19 | 西安电子科技大学 | Broadband low-profile miniaturized AMC cavity monopole antenna |
| CN114374092B (en) * | 2021-12-23 | 2022-12-06 | 西安电子科技大学 | Broadband low-profile miniaturized AMC cavity monopole antenna |
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