CN208908255U - A kind of Bipolarization antenna for base station based on shared doublet arm - Google Patents
A kind of Bipolarization antenna for base station based on shared doublet arm Download PDFInfo
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- CN208908255U CN208908255U CN201821483582.3U CN201821483582U CN208908255U CN 208908255 U CN208908255 U CN 208908255U CN 201821483582 U CN201821483582 U CN 201821483582U CN 208908255 U CN208908255 U CN 208908255U
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Abstract
The utility model discloses a kind of Bipolarization antenna for base station based on shared doublet arm, the antenna includes dielectric-slab, four microstrip-fed lines are printed in the top surface of dielectric-slab, four microstrip-fed lines are positioned opposite two-by-two respectively along two diagonal lines of dielectric-slab, four shared a period of time arms are printed in the bottom surface of dielectric-slab, the shared a period of time arm of described four is located at position opposite with four microstrip-fed lines on dielectric-slab bottom surface, one microstrip-fed line and shared a period of time arm corresponding thereto are connected with one end of a coaxial cable, the other end of the coaxial cable is then connected with a port of microstrip power divider.Antenna disclosed in the utility model, one polarized doublet arm and the doublet arm of another cross polarization are mutually shared, two not like-polarized radiation are realized respectively, antenna radiator size can substantially be reduced, reduce antenna section, while having many advantages, such as that bandwidth, gain and lobe width are stablized.
Description
Technical field
The utility model belongs to wireless communication field, in particular to one of the field is based on shared doublet arm
Bipolarization antenna for base station.
Background technique
With the development of wireless communication technique, there are two orthogonal polarization directions to radiate due to having for dual polarized antenna, can be with
The multipath effect in wireless communication is dramatically reduced, improves radio communication quality, and is widely used.And it is logical in base station
In letter field, with the development of base station communication technology, base station communication proposes the design and index of antenna for base station higher and higher
Requirement.Under limited installation space and dimensional conditions, the size of antenna for base station is compressed smaller and smaller.In addition it considers
With the compatibility of the mobile communication frequency range such as 2G, 3G, 4G, antenna for base station needs the direction toward wide-band and multiband to develop again.Together
When, the development of the mobile communication new technology such as multiple-input and multiple-output (MIMO) and Wave beam forming (Beamforming) is again to dual polarization
More stringent requirements are proposed for the technical indicators such as the isolation and cross polarization level of antenna.Therefore, the miniaturization of antenna for base station, width
The problem of frequency range, high isolation, low-cross polarization level are antenna researchers' strong interests.
Existing Bipolarization antenna for base station mostly uses right-angled intersection doublet form.In order to guarantee the impedance band of antenna
Wide, gain and directional diagram stability, the size of antenna are all bigger.In this way when antenna forms linear array and face battle array, day
Coupling between line will become stronger, and the performance of antenna MIMO and Beamforming just will receive a degree of influence.For
The coupled problem between antenna is solved, the new technologies such as electro-magnetic bandgap (EBG) structure, Meta Materials (Metamaterial) are extensive
It is decoupled applied to antenna, but the complexity and manufacturing cost of Antenna Design will be greatly increased in this way, while again can be to base station day
The radiances such as the directional diagram of line generate tremendous influence.
Summary of the invention
Technical problem to be solved in the utility model is just to provide a kind of dual polarization base based on shared doublet arm
Station antenna.
The utility model adopts the following technical solution:
A kind of Bipolarization antenna for base station based on shared doublet arm, thes improvement is that: the antenna includes
Dielectric-slab prints four microstrip-fed lines in the top surface of dielectric-slab, and four microstrip-fed lines are respectively along dielectric-slab
Two diagonal lines are positioned opposite two-by-two, print four shared a period of time arms, the shared a period of time arm of described four in the bottom surface of dielectric-slab
It is located at position opposite with four microstrip-fed lines on dielectric-slab bottom surface, a microstrip-fed line and corresponding thereto shared
A period of time arm is connected with one end of a coaxial cable, and the other end of the coaxial cable is then held with one of microstrip power divider
Mouth is connected, and in four ports of microstrip power divider, passes through the same diagonal line of coaxial cable and above-mentioned dielectric-slab
On connected two ports of microstrip-fed line and shared a period of time arm be connected with an excitation port of microstrip power divider,
Two excitation ports are then respectively connected with a constant amplitude with the driving source of phase, and horizontal direction additionally is arranged in the underface of dielectric-slab
Antenna-reflected plate.
Further, the dielectric-slab is FR-4 plate.
Further, the microstrip-fed line uses y type structure.
Further, the outer conductor of coaxial cable is connected with shared a period of time arm, and the inner conductor and micro-strip of coaxial cable are presented
Electric wire is connected.
Further, the microstrip power divider is T junction or Wilkinson power divider.
Further, the antenna-reflected plate is two-sided pcb board, and the one side of pcb board face dielectric-slab is all-metal
Microstrip power divider is set to the one side back to dielectric-slab by face.
Further, antenna-reflected plate is located at the place 35mm immediately below dielectric-slab, the size of antenna-reflected plate for 140mm ×
140mm。
Further, the frequency bandwidth which can work is 1.7-2.7GHz, and for standing-wave ratio less than 1.5, isolation is big
In 35dB, gain fluctuation is less than 1dB, and lobe width is within the scope of 60-70 degree.
Further, the polarized radiation in the direction antenna use ± 45o.
Further, which can be applied to wireless communication field, and the wireless communication includes but is not limited to base station
Communication, satellite communication and WLAN, the antenna can be extended to the aerial array of linear array, face battle array and other forms.
The beneficial effects of the utility model are:
Antenna disclosed in this invention, the doublet arm of a polarized doublet arm and another cross polarization
It is mutually shared, two not like-polarized radiation are realized respectively, can substantially be reduced antenna radiator size, be reduced antenna section,
Have many advantages, such as that bandwidth, gain and lobe width are stablized simultaneously.It, can between not same polarization using symmetrical constant amplitude cophase detector
To obtain very high isolation.Antenna-reflected plate can guarantee the stable orientation radiation of antenna.
Antenna disclosed in the utility model, four shared a period of time arms positioned at dielectric-slab bottom surface are in rotational symmetry and center
Symmetrically, four microstrip-fed lines of corresponding medium plate top surface are also that rotational symmetry and central symmetry, this structure can guarantee day
Good isolation performance and stable far-field radiation performance between line not same polarization.
Antenna disclosed in the utility model have size is small, simple and compact for structure, cross polarization level is low, with it is wide,
The advantages that radiance is stable, directional diagram is stablized, is suitably applied the nothings such as base station communication, satellite communication and WLAN
The line communications field.
Detailed description of the invention
Fig. 1 is the schematic perspective view of antenna disclosed in the utility model embodiment 1；
Fig. 2 is that antenna medium plate top surface and the component of bottom surface disclosed in the utility model embodiment 1 are projected in same plane
On structural schematic diagram；
Fig. 3 is the side structure schematic diagram of antenna disclosed in the utility model embodiment 1；
Fig. 4 is the structural schematic diagram of microstrip power divider in antenna disclosed in the utility model embodiment 1；
Fig. 5 is the port isolation degree between the input standing wave of antenna disclosed in the utility model embodiment 1 and not same polarization
According to figure；
Fig. 6 is gain and the lobe width datagram of antenna disclosed in the utility model embodiment 1.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Embodiment 1, as shown in Figs 1-4, present embodiment discloses a kind of double-polarized base stations based on shared doublet arm
Antenna, the antenna include dielectric-slab 5, print four microstrip-fed lines 2, four micro-strips feedback in the top surface of dielectric-slab
Electric wire is positioned opposite two-by-two respectively along two diagonal lines of dielectric-slab, prints four shared a period of time arms 1 in the bottom surface of dielectric-slab,
The shared a period of time arm of described four is located at position opposite with four microstrip-fed lines on dielectric-slab bottom surface, a micro-strip feedback
Electric wire and shared a period of time arm corresponding thereto are connected with one end of a coaxial cable 3, the other end of the coaxial cable then with
The a port of microstrip power divider is connected, in four ports of microstrip power divider, by coaxial cable with it is upper
Give an account of two ports and micro-strip power distribution that microstrip-fed line and shared a period of time arm on the same diagonal line of scutum are connected
One excitation port of device is connected, and two excitation ports are then respectively connected with a constant amplitude with the driving source of phase, is additionally being situated between
The antenna-reflected plate 4 of the underface setting horizontal direction of scutum.
In the present embodiment, the dielectric-slab is FR-4 plate.The microstrip-fed line uses y type structure.Coaxially
The outer conductor of cable is connected with shared a period of time arm, and the inner conductor of coaxial cable is connected with microstrip-fed line.The micro-strip
Power divider is T junction or Wilkinson power divider.The antenna-reflected plate is two-sided pcb board, pcb board face medium
The one side of plate is all-metal face, and microstrip power divider is set to the one side back to dielectric-slab.Antenna-reflected plate is located at dielectric-slab
At the 35mm of underface, the size of antenna-reflected plate is 140mm × 140mm.The frequency bandwidth that the antenna can work is 1.7-
2.7GHz, for standing-wave ratio less than 1.5, isolation is greater than 35dB, and gain fluctuation is less than 1dB, and lobe width is in 60-70 degree range
It is interior.The polarized radiation in the direction antenna use ± 45o.The antenna can be applied to wireless communication field, the wireless communication packet
Base station communication, satellite communication and WLAN are included but are not limited to, which can be extended to linear array, face battle array and other forms
Aerial array.
Specifically, a period of time arm that antenna radiator is interconnected by four forms, positioned at the bottom surface of dielectric-slab.Four battle arrays
Sub- arm has identical structure, and is centrosymmetric and 90o rotational symmetry.Four microstrip-fed lines are located at the top surface of dielectric-slab, together
Sample is centrosymmetric and 90 ° of rotational symmetry.Microstrip-fed line uses y type structure, by adjusting the length of the microstrip-fed line of y type,
Can input impedance to antenna and bandwidth match.
The amplitude and phase that isolation between antenna not same polarization is fed by four ports of symmetry and antenna of antenna
The consistency of position is guaranteed.The amplitude-phase consistency of four ports is better, the isolation of corresponding not same polarization port
It is higher.
For microstrip power divider altogether there are four port, the symmetrical port of every two can motivate a polarized radiation direction,
It is motivated using constant amplitude with the driving source of phase each polarized two port.As shown in Fig. 2, one end of four coaxial cables
Welded respectively with welding position 6A, 7A, 8A, 9A phase on dielectric-slab, 6A, 7A, 8A, 9A then respectively with a microstrip-fed line and
Shared a period of time arm corresponding thereto mutually welds.As shown in figure 4,6B, 7B, 8B, 9B are then another with above-mentioned four coaxial cables respectively
Outer one end is mutually welded, and by the connection of coaxial cable, 6A and 6B are in electrical connection state, and 7A and 7B are in electrical connection state, 8A
It is in electrical connection state with 8B, 9A and 9B are in electrical connection state.Motivate microstrip power divider excitation port 10, then 7A with
For two feed placements of 8A simultaneously by constant amplitude with the excitation of phase, the polarized radiation in the direction+45o is may be implemented in antenna, motivates micro-strip
The excitation port 11 of power divider, then for two feed placements of 6A and 9A simultaneously by constant amplitude with the excitation of phase, antenna can be real
The polarized radiation in the existing direction -45o.
The spacing between length and a period of time arm by adjusting four a period of time arms, can input impedance to antenna, bandwidth
It is adjusted with the centre frequency of work.By adjusting the size of microstrip-fed line, the matching status of antenna can be improved.Micro-strip
Feed line and shared a period of time arm form balun, by adjust antenna radiator (a period of time arm) between antenna-reflected plate at a distance from and day
The size of line reflection plate can make antenna obtain stable radiance, such as the lobe width of antenna gain and antenna.
In conclusion distance to a period of time arm size, microstrip-fed line length, antenna-reflected plate apart from antenna radiator,
The size and medium plate of antenna-reflected plate are adjusted and distribute rationally, Antenna Operation bandwidth can be made to increase, aerial radiation
The far field radiation characteristics stabilizations such as the size of body reduces, isolation raisings between not same polarization, gain, lobe width.
Fig. 5 is the standing wave and isolation parameter curve of two ports of antenna disclosed in the embodiment of the present invention 1, and the antenna is in work
Make frequency range 1.7-2.7GHz range standing internal wave ratio less than 1.5, and its isolation is less than 35dB.
Fig. 6 is gain and the lobe width parameter curve of antenna disclosed in the embodiment of the present invention 1.The antenna is in working frequency range
Gain fluctuation is less than 1dB within the scope of 1.7-2.7GHz, and its corresponding lobe width is within the scope of 60-70o.
Claims (10)
1. a kind of Bipolarization antenna for base station based on shared doublet arm, it is characterised in that: the antenna includes dielectric-slab,
Four microstrip-fed lines are printed in the top surface of dielectric-slab, four microstrip-fed lines are diagonal respectively along two of dielectric-slab
Line is positioned opposite two-by-two, prints four shared a period of time arms in the bottom surface of dielectric-slab, the shared a period of time arm of described four is located at
The position opposite with four microstrip-fed lines on dielectric-slab bottom surface, a microstrip-fed line and shared a period of time arm corresponding thereto with
One end of a piece coaxial cable is connected, and the other end of the coaxial cable is then connected with a port of microstrip power divider
Connect, in four ports of microstrip power divider, by coaxial cable with it is micro- on the same diagonal line of above-mentioned dielectric-slab
It is connected with two connected ports of feed line and shared a period of time arm with an excitation port of microstrip power divider, two are swashed
It encourages port to be then respectively connected with a constant amplitude with the driving source of phase, additionally in the antenna of the underface of dielectric-slab setting horizontal direction
Reflecting plate.
2. the Bipolarization antenna for base station according to claim 1 based on shared doublet arm, it is characterised in that: Jie
Scutum is FR-4 plate.
3. the Bipolarization antenna for base station according to claim 1 based on shared doublet arm, it is characterised in that: described is micro-
Band feed line uses y type structure.
4. the Bipolarization antenna for base station according to claim 1 based on shared doublet arm, it is characterised in that: coaxial cable
Outer conductor be connected with shared a period of time arm, the inner conductor of coaxial cable is connected with microstrip-fed line.
5. the Bipolarization antenna for base station according to claim 1 based on shared doublet arm, it is characterised in that: described is micro-
Band power divider is T junction or Wilkinson power divider.
6. the Bipolarization antenna for base station according to claim 1 based on shared doublet arm, it is characterised in that: the day
Line reflection plate is two-sided pcb board, and the one side of pcb board face dielectric-slab is all-metal face, and microstrip power divider is set to back
To the one side of dielectric-slab.
7. the Bipolarization antenna for base station according to claim 1 based on shared doublet arm, it is characterised in that: antenna-reflected
Plate is located at immediately below dielectric-slab at 35mm, and the size of antenna-reflected plate is 140mm × 140mm.
8. the Bipolarization antenna for base station according to claim 1 based on shared doublet arm, it is characterised in that: the antenna can
The frequency bandwidth of work is 1.7-2.7GHz, and for standing-wave ratio less than 1.5, isolation is greater than 35dB, and gain fluctuation is less than 1dB, wave
Valve width is within the scope of 60-70 degree.
9. the Bipolarization antenna for base station according to claim 1 based on shared doublet arm, it is characterised in that: antenna uses
The polarized radiation in the direction ± 45o.
10. the Bipolarization antenna for base station according to claim 1 based on shared doublet arm, it is characterised in that: the antenna
It can be applied to wireless communication field, the wireless communication includes but is not limited to base station communication, satellite communication and wireless local area
Net, the antenna can be extended to the aerial array of linear array, face formation formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821483582.3U CN208908255U (en) | 2018-09-11 | 2018-09-11 | A kind of Bipolarization antenna for base station based on shared doublet arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821483582.3U CN208908255U (en) | 2018-09-11 | 2018-09-11 | A kind of Bipolarization antenna for base station based on shared doublet arm |
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| CN208908255U true CN208908255U (en) | 2019-05-28 |
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| CN201821483582.3U Active CN208908255U (en) | 2018-09-11 | 2018-09-11 | A kind of Bipolarization antenna for base station based on shared doublet arm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088157A (en) * | 2018-09-11 | 2018-12-25 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | A kind of Bipolarization antenna for base station based on shared doublet arm |
-
2018
- 2018-09-11 CN CN201821483582.3U patent/CN208908255U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088157A (en) * | 2018-09-11 | 2018-12-25 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | A kind of Bipolarization antenna for base station based on shared doublet arm |
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