CN209730169U - A kind of built-in mimo antenna - Google Patents
A kind of built-in mimo antenna Download PDFInfo
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- CN209730169U CN209730169U CN201920870919.4U CN201920870919U CN209730169U CN 209730169 U CN209730169 U CN 209730169U CN 201920870919 U CN201920870919 U CN 201920870919U CN 209730169 U CN209730169 U CN 209730169U
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Abstract
The utility model provides a kind of built-in mimo antenna, comprising: pcb board and the first antenna group and the second antenna sets that are integrated on the pcb board；The first antenna group includes first antenna and the second antenna, the first antenna includes first medium substrate and the first antenna pattern that is printed upon on the first medium substrate, and second antenna includes second medium substrate and the second antenna pattern for being printed upon on the second medium substrate；The first antenna pattern is based on magnetic dipole structure and obtains by bending deformation, the first antenna pattern and second antenna pattern zhou duicheng tuxing each other；The first antenna group and second antenna sets are identical structure, so that second antenna sets, which are coupled with the mimo antenna that the first antenna group is constituted in resonance center frequency point, reaches minimum value.The utility model guarantees the isolation between antenna under the premise of limited areal, can change the bandwidth of operation of antenna freely to realize that the MIMO under other frequencies and bandwidth requirement is applied.
Description
Technical field
The utility model belongs to communication equipment field, especially suitable for 5G communication situation；The utility model is specifically related to
A kind of built-in mimo antenna.
Background technique
There are mainly three types of existing antennas:
External single antenna: external antenna is widely used for one of the wireless devices such as router antenna, mainly lacks
Point is that volume is big, cannot be integrated on mainboard.And as MIMO application when every two antenna need to be separated a certain distance with
Have the function that improve isolation, it is many that mutiple antennas can be such that the volume of equipment increases, it has not been convenient to also unsightly.
Built-in PCB single antenna: repeating to install, remote to arrange；Built-in antenna can integrate inside radio equipment shell,
Performance is poorer than external antenna, but volume is much smaller, and aesthetics has certain promotion.When for MIMO, different units need to separate compared with
Big distance is to reduce coupling.Be not suitable for high-order mimo (> 4), overall volume is big.
Double antenna: double antenna closely arranges and uses certain decoupling measure: the spacing between adding unit is to improve day
The most simple effective method of isolation between line, major defect are that occupancy volume is big.It can be not using certain decoupling measure
Spacing needed for moderately reducing under conditions of sacrifice isolation.Common decoupling measure has decoupling circuit (network), parasitic element solution
Coupling；Neutralize line decoupling；Floor grooving decoupling, artificial special construction decoupling etc..All these decoupling measures require to occupy additional
Space to increasing volume.In addition most of decoupling-structures can all generate certain influence to the performance of original antenna, decoupling
The intermodulation of structure and antenna will increase the complexity of design and installation.In addition day of the decoupling measure generally just for a certain seed type
Linear array structure is difficult to carry out general popularization.Due to the above limiting factors, these decoupling measures are not yet extensive in industry
It promotes.
Utility model content
The utility model provides a kind of built-in mimo antenna.
The utility model is realized with following technical solution:
A kind of built-in mimo antenna, comprising:
Pcb board and the first antenna group and the second antenna sets being integrated on the pcb board；
The first antenna group is connected to the first antenna interface group of mainboard, second antenna by the first RF cable
Group is connected to the second antennal interface group of the mainboard by the second RF cable；
The first antenna group includes first antenna and the second antenna, and the first antenna includes first medium substrate and beats
The first antenna pattern being imprinted on the first medium substrate, second antenna include second medium substrate and are printed upon described
The second antenna pattern on second medium substrate；The first antenna pattern is based on magnetic dipole structure and obtains by bending deformation
It arrives, the first antenna pattern and second antenna pattern zhou duicheng tuxing each other；
The first antenna group and second antenna sets are identical structure, so that second antenna sets and described the
The mimo antenna that one antenna sets are constituted reaches minimum value in the coupling of resonance center frequency point.
Preferably, the first antenna pattern include be covered on the first of first medium substrate edge while, second while, third
While and when the 4th, described first while, second while and third side be in turn connected to form C-shaped pattern.
Preferably, described first while, second while, third while and length summation when the 4th be center frequency wavelength
0.49-0.51 times；Described first while, second while, third side and the 4th hem width degree can be adjusted according to mating situation.
Preferably, the 4th place of being bordered by while with the third is provided with feed port, in order to weld radio frequency line
Cable with mainboard to be connected.
Preferably, 3.5-4.5 millimeters of the first antenna and second antenna spacing.
Preferably, the first antenna group and the second antenna sets spacing are the 0.031-0.033 of center frequency wavelength
Times.
Preferably, the pcb board length is 0.032-0.034 times of center frequency wavelength, centered on the pcb board width
0.13-0.15 times of frequency wavelength.
The beneficial effects of the utility model are:
A kind of built-in mimo antenna provided by the utility model, has the following beneficial effects:
Collect pair of aerials group in a small area, and reaches 2.4-2.5G's under the premise of not needing any decoupling measure
Working frequency, and ideal isolating points are generated, the isolation between antenna has been fully ensured that under the premise of limited areal, has been met
The requirement of WIFI802.11b/g/n can change the bandwidth of operation of antenna freely to realize in other frequencies and bandwidth requirement
Under MIMO application.
Detailed description of the invention
Fig. 1 is a kind of built-in mimo antenna schematic diagram provided by the embodiment of the utility model；
Fig. 2 is first antenna group schematic diagram provided by the embodiment of the utility model；
Fig. 3 is the S parameter schematic diagram of mimo antenna provided by the embodiment of the utility model；
The radiation direction of Fig. 4 (1) mimo antenna when being first antenna group provided by the embodiment of the utility model feed
Figure；
The radiation direction of Fig. 4 (2) mimo antenna when being the second antenna sets provided by the embodiment of the utility model feed
Figure.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type is described in further detail, right at the beginning of embodiment for the ease of the utility model embodiment is accurately described in detail
Related background art and relational language carry out brief introduction.
The utility model discloses a kind of built-in mimo antenna, such as Fig. 1, comprising:
Pcb board 10 and the first antenna group 1 being integrated on the pcb board and the second antenna sets 2；
The first antenna group 1 is connected to the first antenna interface group 12 of mainboard by the first RF cable 11, and described the
Two antenna sets 2 are connected to the second antennal interface group 22 of the mainboard by the second RF cable 21.1 He of first antenna group
Second antenna sets 2 are identical structure, so that the mimo antenna that second antenna sets and the first antenna group are constituted
Reach minimum value in the coupling of resonance center frequency point.
Built-in antenna in the prior art is printed on fritter circuit board by PCB technology mostly, in order to guarantee between antenna
Isolation would generally maintain a certain distance between antenna element, this is but also be merely able to one antenna of installation on single pcb board
Group.Formed therewith corresponding, the utility model can integrate two antenna sets in same pcb board, while still guarantee compared with
The reason of high isolation, isolation is kept, has benefited from the design of antenna pattern, is specifically described in detail below:
As shown in Fig. 2, the first antenna group 1 includes first antenna 100 and the second antenna 200, the first antenna 100
Including first medium substrate and the first antenna pattern being printed upon on the first medium substrate, second antenna 200 includes
Second medium substrate and the second antenna pattern being printed upon on the second medium substrate；The first antenna pattern is based on magnetic couple
Pole minor structure is obtained by bending deformation, the first antenna pattern and second antenna pattern zhou duicheng tuxing each other.
Specifically, the first antenna pattern includes being covered on the first of first medium substrate edge at 101, second
102, third is at 103 and the 4th 104, described first at 101, second 102 and third side 103 be in turn connected to form C-shaped figure
Case.
Specifically, the described first frequency centered on 104 length summation while 102, third is in 103 and the 4th at 101, second
0.49-0.51 times of rate wavelength；Described first 104 width while 102, third is in 103 and the 4th at 101, second being capable of basis
Mating situation is adjusted.
Described 4th while 104 with the third while 103 the place of being bordered by be provided with feed port 105, in order to weld radio frequency
Cable with mainboard to be connected.
Specifically, 3.5-4.5 millimeters of the first antenna and second antenna spacing.
Specifically, the first antenna group and the second antenna sets spacing are the 0.031-0.033 of center frequency wavelength
Times.
Specifically, the pcb board length is 0.032-0.034 times of center frequency wavelength, centered on the pcb board width
0.13-0.15 times of frequency wavelength.It is clear that mimo antenna collects on the very small pcb board of the gross area in the utility model
At two antenna sets, double antenna group only has primary antenna irradiation structure, and any decoupling-structure (decoupling circuit, artificial solution is not present
Coupling structure, parasitic radiator neutralize line etc.), therefore overall dimensions further decrease.
Referring to FIG. 3, it illustrates the S parameters of the mimo antenna, it can be clearly seen that, center of antenna frequency point is
2.45GHz, working frequency 2.4-2.5GHz meet the requirement of WIFI802.11b/g/n.S21 representative antennas isolation, in
Heart frequency point, the modulus value of S21 are 0, are ideal isolating points, and be overlapped with perfect match point (S11=0).It is coupled most in working frequency range
Big value is -25dB.
Fig. 4 (1) is please referred to, it illustrates the antenna patterns of mimo antenna described when first antenna group feed.It please refers to
Fig. 4 (2), it illustrates the antenna patterns of mimo antenna described when the second antenna sets feed.The directional diagram and magnetic couple of single antenna
Extremely sub directional diagram is similar, and directional diagram when two antennas are fed respectively is mutually complementary in 3d space, compensates for magnetic dipole spoke
Penetrate the Zeroes of directional diagram.This complementarity is conducive to receiving of the terminal device to signal.
According to Fig. 3-4 it is recognized that while without any decoupling measure, but heart frequency point at work, there are an ideal every
From point (coupling minimum point, S21=0), while with interior holding high-isolation (> 25dB).Antenna element is based on magnetic dipole knot
For structure by bending deformation, the directional diagram of the similar traditional magnetic dipole of directional diagram, is in a plane omnidirectional radiation, and
Graphic memory normal thereto is in radiation zero.By being bent into C-shaped and using back-to-back arrangement, two unit blind spot direction spokes
It penetrates and is complementary to one another, the double antenna after complementation is omnidirectional radiation in 3d space, and there is no radiation blind spots.In addition, two antenna polarizations
It is orthogonal, increase the diversity of antenna pattern.
Mimo antenna working frequency is 2.4GHz-2.5GHz in the utility model, meets wanting for WIFI802.11b/g/n
It asks, is suitable as the built-in antenna of high-speed Wifi equipment.Meanwhile not influenced by floor size and installation site, it can incite somebody to action
Antenna repetition is mounted on the different location of the same equipment to realize the mimo system of higher order (> 2).By changing entirety
Size can change the bandwidth of operation of antenna freely to realize that the MIMO under other frequencies and bandwidth requirement is applied.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the utility model
Embodiment can be practiced without these specific details.In some instances, be not been shown in detail well known method,
Structure and technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more in each utility model aspect
A, in the description above to the exemplary embodiment of the utility model, each feature of the utility model is divided together sometimes
Group is into single embodiment, figure or descriptions thereof.However, the method for the disclosure should not be construed to reflect following meaning
Figure: the requires of the utility model features more more than feature expressly recited in each claim i.e. claimed.
More precisely, being in terms of utility model as claims of the utility model reflect less than disclosed above
Single embodiment all features.Therefore, it then follows thus claims of specific embodiment are expressly incorporated in this specific
Embodiment, wherein separate embodiments of each claim as the utility model itself.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
In addition, it will be appreciated by those of skill in the art that although embodiment described herein includes institute in other embodiments
Including certain features rather than other feature, but the combination of the feature of different embodiment means to be in the utility model
Within the scope of and form different embodiments.For example, in claims of the utility model, implementation claimed
Example it is one of any can in any combination mode come using.
The utility model is also implemented as some or all equipment for executing method as described herein
Or system program (such as computer program and computer program product).Such program for realizing the utility model can store
On a computer-readable medium, it or may be in the form of one or more signals.Such signal can be from internet
Downloading obtains on website, can also be provided on the carrier signal, or be provided in any other form.
It should be noted that above-described embodiment is to illustrate rather than to limit the utility model to the utility model
System, and those skilled in the art can be designed alternative embodiment without departing from the scope of the appended claims.In
In claim, any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising"
Elements or steps etc. not listed in the claims are not excluded the presence of.Word "a" or "an" located in front of the element is not arranged
Except there are multiple such elements.The utility model can be by means of including the hardware of several different elements and by means of suitable
When the computer of programming is realized.If several in these systems can be in the unit claim for listing dry systems
It is to be embodied by the same item of hardware.The use of word first, second and third etc. does not indicate any sequence, can will
These words are construed to title.
Claims (7)
1. a kind of built-in mimo antenna characterized by comprising
Pcb board and the first antenna group and the second antenna sets being integrated on the pcb board；
The first antenna group is connected to the first antenna interface group of mainboard by the first RF cable, and second antenna sets are logical
Cross the second antennal interface group that the second RF cable is connected to the mainboard；
The first antenna group includes first antenna and the second antenna, and the first antenna includes first medium substrate and is printed upon
First antenna pattern on the first medium substrate, second antenna include second medium substrate and are printed upon described second
The second antenna pattern on medium substrate；The first antenna pattern is based on magnetic dipole structure and obtains by bending deformation,
The first antenna pattern and second antenna pattern zhou duicheng tuxing each other；
The first antenna group and second antenna sets are identical structure, so that second antenna sets and described first day
The mimo antenna that line group is constituted reaches minimum value in the coupling of resonance center frequency point.
2. mimo antenna according to claim 1, it is characterised in that:
The first antenna pattern include be covered on the first of first medium substrate edge while, second while, third while and when the 4th,
Described first while, second while and third side be in turn connected to form C-shaped pattern.
3. mimo antenna according to claim 2, it is characterised in that:
Described first while, second while, third while and length summation when the 4th be 0.49-0.51 times of center frequency wavelength；Institute
State first while, second while, third side and the 4th hem width degree can be adjusted according to mating situation.
4. mimo antenna according to claim 3, it is characterised in that:
4th place of being bordered by while with the third is provided with feed port, in order to weld RF cable thus and mainboard
It is connected.
5. mimo antenna according to claim 1, it is characterised in that:
3.5-4.5 millimeters of the first antenna and second antenna spacing.
6. mimo antenna according to claim 1, it is characterised in that:
The first antenna group and the second antenna sets spacing are 0.031-0.033 times of center frequency wavelength.
7. mimo antenna according to claim 1, it is characterised in that:
The pcb board length is 0.032-0.034 times of center frequency wavelength, and the pcb board width is center frequency wavelength
0.13-0.15 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920870919.4U CN209730169U (en) | 2019-06-11 | 2019-06-11 | A kind of built-in mimo antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920870919.4U CN209730169U (en) | 2019-06-11 | 2019-06-11 | A kind of built-in mimo antenna |
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| Publication Number | Publication Date |
|---|---|
| CN209730169U true CN209730169U (en) | 2019-12-03 |
Family
ID=68675386
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| CN201920870919.4U Active CN209730169U (en) | 2019-06-11 | 2019-06-11 | A kind of built-in mimo antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111405515A (en) * | 2020-03-25 | 2020-07-10 | 杭州一鸣惊人网络科技有限公司 | Internet of things based on 5G communication |
| CN114171896A (en) * | 2021-12-06 | 2022-03-11 | 京东方科技集团股份有限公司 | Display module and display device |
| CN114171896B (en) * | 2021-12-06 | 2024-05-17 | 华为技术有限公司 | Display module and display device |
-
2019
- 2019-06-11 CN CN201920870919.4U patent/CN209730169U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111405515A (en) * | 2020-03-25 | 2020-07-10 | 杭州一鸣惊人网络科技有限公司 | Internet of things based on 5G communication |
| CN114171896A (en) * | 2021-12-06 | 2022-03-11 | 京东方科技集团股份有限公司 | Display module and display device |
| CN114171896B (en) * | 2021-12-06 | 2024-05-17 | 华为技术有限公司 | Display module and display device |
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