CN105762512A - Antenna - Google Patents
Antenna Download PDFInfo
- Publication number
- CN105762512A CN105762512A CN201610179666.7A CN201610179666A CN105762512A CN 105762512 A CN105762512 A CN 105762512A CN 201610179666 A CN201610179666 A CN 201610179666A CN 105762512 A CN105762512 A CN 105762512A
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- China
- Prior art keywords
- antenna
- shell fragment
- electric capacity
- antenna radiator
- metal shell
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—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
Abstract
The invention discloses an antenna comprising a metallic housing equipped with a slit. The slit divides the metallic housing into two parts. The first part of the metallic housing is used as an antenna radiator. The second part of the metallic housing is used as the ground. The antenna radiator is provided with a feed point, a ground point, and a capacitor connection point. The feed point is connected with the antenna radiator and a feed signal. The ground point is connected with the antenna radiator and the ground. The capacitor point is connected with the antenna radiator and an adjustable capacitor.
Description
Technical field
The present invention relates to antenna technology, particularly relate to a kind of antenna based on metal-back.
Background technology
Along with forth generation (4G, 4thGeneration) the developing rapidly of mechanics of communication, current mobile terminal also supports 4G network more and more, and this is accomplished by antenna and has wider bandwidth to meet the demand of user.On the other hand, further universal along with 4G terminal, mobile phone homogeneity is also increasingly severe, and people opponent is confidential asks also more and more higher, and such as: fuselage texture, user surfs the Net experience etc..For this, many cell phone manufacturers are proposed metal type, and wherein all-metal integrated mobile phone is because it is attractive in appearance, fashion enjoys consumer to like.All-metal mobile phone, while promoting mobile phone texture, class, also because metal has natural signal shielding characteristic, reduces the performance of antenna, in order to not affect the experience of user, meets 4G standard simultaneously, and this also just brings huge challenge to Antenna Design.
In order to not affect the performance of antenna, it is capable of antenna performance by metal back cover fluting.With reference to Fig. 1, the bottom of metal back cover is as the some of antenna radiator and outward appearance, and the distributing point of antenna and earth point lay respectively at the both sides of metal-back, and existing antenna structure does not use adjustable device, the bandwidth of antenna can not get expanding, and the performance of antenna is also poor.
Summary of the invention
For solving above-mentioned technical problem, embodiments provide a kind of antenna.
The antenna that the embodiment of the present invention provides includes: metal shell, described metal shell is provided with gap, described metal shell is separated for two parts by described gap, and the Part I of described metal shell is as antenna radiator, and the Part II of described metal shell is as ground；
Described antenna radiator is provided with distributing point, earth point, electric capacity junction point；Wherein, described distributing point connects described antenna radiator and electric feed signal；Described earth point connects described antenna radiator and ground；Described electric capacity junction point connects described antenna radiator and tunable capacitor.
In the embodiment of the present invention, described distributing point is connected with described antenna radiator by feeding shell fragment；Described earth point is connected with described antenna radiator by grounding elastic part；Described electric capacity junction point is connected with described antenna radiator by electric capacity shell fragment.
In the embodiment of the present invention, the first end of described tunable capacitor is connected with described antenna radiator by electric capacity shell fragment, and the second end of described tunable capacitor is connected to the ground by PCB.
In the embodiment of the present invention, described antenna also includes: printed circuit board (PCB, PrintedCircuitBoard)；
Described tunable capacitor is connected by the Part II of the conducting wire on described PCB with described metal shell.
In the embodiment of the present invention, described feed shell fragment, described grounding elastic part and described electric capacity shell fragment, and it is provided with pad between described antenna radiator.
In the embodiment of the present invention, described grounding elastic part is between described feed shell fragment and described electric capacity shell fragment, and described grounding elastic part and USB (universal serial bus) (USB, UniversalSerialBus) joint weld.
In the embodiment of the present invention, the Part I of described metal shell includes: the first radiation areas, the second radiation areas；
Wherein, described first radiation areas are: part metals housing between described feed shell fragment and described grounding elastic part and described feed shell fragment are to the part metals housing of the first edge metal housing；
Described second radiation areas are: part metals housing between described feed shell fragment and described electric capacity shell fragment and described electric capacity shell fragment are to the part metals housing of the second edge metal housing.
In the embodiment of the present invention, the radiation frequency of described first radiation areas is the first frequency range；The radiation frequency of described second radiation areas is the second frequency range；Described first frequency range is higher than described second frequency range.
In the embodiment of the present invention, described first radiation areas form two resonant tanks, including: the first resonant tank, the second resonant tank；Wherein,
Described first resonant tank of formation between described feed shell fragment and described grounding elastic part；Described feed shell fragment is to described first edge metal housing, and the Part II of described gap and described metal shell forms described second resonant tank.
In the embodiment of the present invention, by the adjustment of described tunable capacitor, the resonant frequency controlling described second radiation areas generation changes in described first frequency range；By the adjustment of described tunable capacitor, make the Part II of described metal shell sense voltage, and make the Part II of described metal shell produce radiation.
In the technical scheme of the embodiment of the present invention, antenna includes: metal shell, and described metal shell is provided with gap, and described metal shell is separated for two parts by described gap, the Part I of described metal shell is as antenna radiator, and the Part II of described metal shell is as ground；Described antenna radiator is provided with distributing point, earth point, electric capacity junction point；Wherein, described distributing point connects described antenna radiator and electric feed signal；Described earth point connects described antenna radiator and ground；Described electric capacity junction point connects described antenna radiator and tunable capacitor.So, expand the beamwidth of antenna by tunable capacitor, improve antenna efficiency, it is achieved cost is low, and stability is higher.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the antenna based on metal-back；
Fig. 2 is the block mold schematic diagram one of the antenna of the embodiment of the present invention；
Fig. 3 is the block mold schematic diagram two of the antenna of the embodiment of the present invention；
Fig. 4 is the schematic diagram of the radiation areas of the antenna of the embodiment of the present invention；
Fig. 5 is the tunable capacitor of embodiment of the present invention S11 value of antenna under different capacitances；
Fig. 6 is the antenna measurement efficiency chart of the embodiment of the present invention.
Detailed description of the invention
In order to more fully hereinafter understand feature and the technology contents of the embodiment of the present invention, below in conjunction with accompanying drawing, the realization of the embodiment of the present invention is described in detail, appended accompanying drawing purposes of discussion only for reference, is not used for limiting the embodiment of the present invention.
The embodiment of the present invention proposes a kind of adjustable antenna based on metal back cover, and antenna radiator and the tunable capacitor based on metal back cover is combined by the technical scheme of the embodiment of the present invention, adopts easy tuning form to widen bandwidth.Meanwhile, the technical scheme of the embodiment of the present invention is merely with metal back cover, it does not have extra antenna detail and tuning switch, provides cost savings, designs simple, it is possible to be advantageously applied to based in the antenna for mobile phone design of metal back cover.
The antenna that the embodiment of the present invention provides includes: metal shell, described metal shell is provided with gap, described metal shell is separated for two parts by described gap, and the Part I of described metal shell is as antenna radiator, and the Part II of described metal shell is as ground；
Described antenna radiator is provided with distributing point, earth point, electric capacity junction point；Wherein, described distributing point connects described antenna radiator and electric feed signal；Described earth point connects described antenna radiator and ground；Described electric capacity junction point connects described antenna radiator and tunable capacitor.
In the embodiment of the present invention, described distributing point is connected with described antenna radiator by feeding shell fragment；Described earth point is connected with described antenna radiator by grounding elastic part；Described electric capacity junction point is connected with described antenna radiator by electric capacity shell fragment.
In the embodiment of the present invention, the first end of described tunable capacitor is connected with described antenna radiator by electric capacity shell fragment, and the second end of described tunable capacitor is connected to the ground by PCB.
In the embodiment of the present invention, described antenna also includes: PCB；
Described tunable capacitor is connected by the Part II of the conducting wire on described PCB with described metal shell.
In the embodiment of the present invention, described feed shell fragment, described grounding elastic part and described electric capacity shell fragment, and it is provided with pad between described antenna radiator.
In the embodiment of the present invention, described grounding elastic part is between described feed shell fragment and described electric capacity shell fragment, and described grounding elastic part welds with USB interface.
In the embodiment of the present invention, the Part I of described metal shell includes: the first radiation areas, the second radiation areas；
Wherein, described first radiation areas are: part metals housing between described feed shell fragment and described grounding elastic part and described feed shell fragment are to the part metals housing of the first edge metal housing；
Described second radiation areas are: part metals housing between described feed shell fragment and described electric capacity shell fragment and described electric capacity shell fragment are to the part metals housing of the second edge metal housing.
In the embodiment of the present invention, the radiation frequency of described first radiation areas is the first frequency range；The radiation frequency of described second radiation areas is the second frequency range；Described first frequency range is higher than described second frequency range.
In the embodiment of the present invention, described first radiation areas form two resonant tanks, including: the first resonant tank, the second resonant tank；Wherein,
Described first resonant tank of formation between described feed shell fragment and described grounding elastic part；Described feed shell fragment is to described first edge metal housing, and the Part II of described gap and described metal shell forms described second resonant tank.
In the embodiment of the present invention, by the adjustment of described tunable capacitor, the resonant frequency controlling described second radiation areas generation changes in described first frequency range；By the adjustment of described tunable capacitor, make the Part II of described metal shell sense voltage, and make the Part II of described metal shell produce radiation.
Below in conjunction with specific embodiment, the antenna of the present invention is described in further detail again.
Fig. 2 is the block mold schematic diagram of the antenna of the embodiment of the present invention.Antenna applications in this example is in mobile phone, certainly, it will be appreciated by those skilled in the art that the antenna of the embodiment of the present invention can be applied in other kinds of terminal, for instance panel computer etc..
In Fig. 2, antenna includes: metal shell, and described metal shell is provided with gap 30, and described metal shell is separated for two parts by described gap 30, the Part I 20 of described metal shell is as antenna radiator 20, and the Part II 10 of described metal shell is as ground.
In the embodiment of the present invention, antenna radiator 20 is a part for metal shell, the shape of antenna radiator 20 is determined based on metal shell, when implementing, the shape of antenna radiator 20 can be the design requirement according to electronic product is various shape, in one embodiment, described antenna radiator 20 has the outward appearance of three-dimensional (3D) cambered surface, housing thickness about 1 millimeter.
In the embodiment of the present invention, the Part I 20 of metal shell refers to the bottom of metal shell, and the Part II 10 of metal shell refers to more than the middle part of metal shell.In one embodiment, metal shell can also arrange two gaps, and so, it is three parts that metal shell is spaced, and the bottom of metal shell is still as antenna radiator 20, and the middle part of metal shell is as ground.
In the embodiment of the present invention, antenna radiator 20 is provided with distributing point, earth point, electric capacity junction point；Wherein, described distributing point connects described antenna radiator 20 and electric feed signal；Described earth point connects described antenna radiator 20 and ground；Described electric capacity junction point connects described antenna radiator 20 and tunable capacitor.
Visible, the antenna radiator 20 in the embodiment of the present invention is connected with tunable capacitor by electric capacity junction point, and the change of tunable capacitor is capable of the adjustment to the beamwidth of antenna, thus adding the beamwidth of antenna.
In the embodiment of the present invention, described distributing point is connected with described antenna radiator 20 by feeding shell fragment 21；Described earth point is connected with described antenna radiator 20 by grounding elastic part 22；Described electric capacity junction point is connected with described antenna radiator 20 by electric capacity shell fragment 23.
With reference to Fig. 3, in the embodiment of the present invention, the first end of tunable capacitor 24 is connected with described antenna radiator 20 by electric capacity shell fragment 23, and the second end of described tunable capacitor 24 is connected to the ground by PCB41.
Specifically, described antenna also includes: PCB41；
Described tunable capacitor 24 is connected with the Part II 10 of described metal shell by the conducting wire on described PCB41.
Here, conducting wire can be copper cash.
With reference to Fig. 3, in the embodiment of the present invention, described feed shell fragment 21, described grounding elastic part 22 and described electric capacity shell fragment 23, and between described antenna radiator 20, it is provided with pad 25.
So, the fastness between each shell fragment and antenna radiator is increased by each pad 25.
In the embodiment of the present invention, described grounding elastic part 22 is between described feed shell fragment 21 and described electric capacity shell fragment 23, and described grounding elastic part 22 welds with USB interface.
Here, being connected to the ground of USB interface.
Fig. 4 is the schematic diagram of the radiation areas of the antenna of the embodiment of the present invention.Antenna applications in this example is in mobile phone, certainly, it will be appreciated by those skilled in the art that the antenna of the embodiment of the present invention can be applied in other kinds of terminal, for instance panel computer etc..
In Fig. 4, the Part I 20 of metal shell includes: the first radiation areas, the second radiation areas；
Wherein, described first radiation areas are: part metals housing between described feed shell fragment 21 and described grounding elastic part 22 and the part metals housing of described feed shell fragment the 21 to the first edge metal housing.
Described second radiation areas are: part metals housing between described feed shell fragment 21 and described electric capacity shell fragment 23 and the part metals housing of described electric capacity shell fragment the 23 to the second edge metal housing.
In the embodiment of the present invention, the a-quadrant part in the first radiation areas corresponding diagram 3, the B region part in the second radiation areas corresponding diagram 3.
The radiation frequency of described first radiation areas is the first frequency range；The radiation frequency of described second radiation areas is the second frequency range；Described first frequency range is higher than described second frequency range.
In the embodiment of the present invention, the first frequency range refers to high-frequency band, and the region shown in A is high frequency radiation district.A-quadrant comprises the metal-back part between feed shell fragment and grounding elastic part and feeds shell fragment to nearest edge metal shell.
In the embodiment of the present invention, the second frequency range refers to low frequency frequency range, and the region shown in B is low frequency radiation district.B region comprises the metal-back part between feed shell fragment and electric capacity shell fragment and electric capacity shell fragment to nearest edge metal shell.
In the embodiment of the present invention, described first radiation areas form two resonant tanks, including: the first resonant tank, the second resonant tank；Wherein,
Described first resonant tank of formation between described feed shell fragment and described grounding elastic part；Described feed shell fragment is to described first edge metal housing, and the Part II of described gap and described metal shell forms described second resonant tank.
With reference to Fig. 4, the first resonant tank is corresponding: the loop antenna pattern that two resonance of high frequency are determined by the length between feed shell fragment and grounding elastic part respectively；Second resonant tank is corresponding: feed shell fragment passes through to stitch and the coupling ring antenna mode on metal-back ground to nearest edge metal shell.
In the embodiment of the present invention, for low frequency radiation district (i.e. B region), by the adjustment of described tunable capacitor, the resonant frequency controlling described second radiation areas generation changes in described first frequency range；By the adjustment of described tunable capacitor, make the Part II of described metal shell sense voltage, and make the Part II of described metal shell produce radiation.
Specifically, the adjustment by tunable capacitor of the length of low-frequency resonant, the electric capacity shell fragment connecting tunable capacitor is positioned at the antenna radiator side by seam, namely can pass through, by the change of voltage on tunable capacitor, the induced voltage that slot coupling affects the Part II (i.e. metal-back ground) of metal shell, by the partial radiation of the Part II of metal shell, improve radiation efficiency.Meanwhile, the electric capacity shell fragment of tunable capacitor is near the edge in low frequency radiation district, and for the region that voltage is the highest, the change of the capacitance of tunable capacitor can directly affect the voltage's distribiuting in this region, thus affecting resonant frequency, it is achieved the purpose that bandwidth increases.
Fig. 5 is the tunable capacitor of embodiment of the present invention S11 value of antenna under different capacitances, and antenna is completely covered mobile communication frequency range as seen from the figure.Here, S11 value represents return loss characteristic, typically via dB value and the impedance operator of its loss of Network Analyzer.S11 value represents the quality of the emission effciency of antenna, and S11 value value is more big, represents that the energy that antenna itself reflects is more big, and the efficiency of such antenna is more poor.
Fig. 6 is the antenna measurement efficiency chart of the embodiment of the present invention, and curve 50 is the efficiency by inputoutput test of prior art, the efficiency by inputoutput test under curve 51-53 respectively tri-kinds of states of tunable capacitor value 2.7pF, 1.5pF, 1pF.The antenna of embodiment of the present invention efficiency under low-and high-frequency works is superior to prior art as seen from the figure.
The technical scheme of the embodiment of the present invention, adds the bandwidth of antenna, it is achieved cost is low, and stability is higher.
Between technical scheme described in the embodiment of the present invention, when not conflicting, it is possible to combination in any.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should be encompassed within protection scope of the present invention.
Claims (10)
1. an antenna, described antenna includes: metal shell, and described metal shell is provided with gap, and described metal shell is separated for two parts by described gap, and the Part I of described metal shell is as antenna radiator, and the Part II of described metal shell is as ground；
Described antenna radiator is provided with distributing point, earth point, electric capacity junction point；Wherein, described distributing point connects described antenna radiator and electric feed signal；Described earth point connects described antenna radiator and ground；Described electric capacity junction point connects described antenna radiator and tunable capacitor.
2. antenna according to claim 1, described distributing point is connected with described antenna radiator by feeding shell fragment；Described earth point is connected with described antenna radiator by grounding elastic part；Described electric capacity junction point is connected with described antenna radiator by electric capacity shell fragment.
3. antenna according to claim 1, the first end of described tunable capacitor is connected with described antenna radiator by electric capacity shell fragment, and the second end of described tunable capacitor is connected to the ground by PCB.
4. antenna according to claim 3, described antenna also includes: printing board PCB；
Described tunable capacitor is connected by the Part II of the conducting wire on described PCB with described metal shell.
5. antenna according to claim 2, described feed shell fragment, described grounding elastic part and described electric capacity shell fragment, and it is provided with pad between described antenna radiator.
6. antenna according to claim 2, described grounding elastic part is between described feed shell fragment and described electric capacity shell fragment, and described grounding elastic part and general-purpose serial bus USB joint weld.
7. antenna according to claim 6, the Part I of described metal shell includes: the first radiation areas, the second radiation areas；
Wherein, described first radiation areas are: part metals housing between described feed shell fragment and described grounding elastic part and described feed shell fragment are to the part metals housing of the first edge metal housing；
Described second radiation areas are: part metals housing between described feed shell fragment and described electric capacity shell fragment and described electric capacity shell fragment are to the part metals housing of the second edge metal housing.
8. antenna according to claim 7, the radiation frequency of described first radiation areas is the first frequency range；The radiation frequency of described second radiation areas is the second frequency range；Described first frequency range is higher than described second frequency range.
9. antenna according to claim 8, described first radiation areas form two resonant tanks, including: the first resonant tank, the second resonant tank；Wherein,
Described first resonant tank of formation between described feed shell fragment and described grounding elastic part；Described feed shell fragment is to described first edge metal housing, and the Part II of described gap and described metal shell forms described second resonant tank.
10. antenna according to claim 8, by the adjustment of described tunable capacitor, the resonant frequency controlling described second radiation areas generation changes in described first frequency range；By the adjustment of described tunable capacitor, make the Part II of described metal shell sense voltage, and make the Part II of described metal shell produce radiation.
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| CN201610179666.7A CN105762512B (en) | 2016-03-25 | 2016-03-25 | A kind of antenna |
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| CN201610179666.7A CN105762512B (en) | 2016-03-25 | 2016-03-25 | A kind of antenna |
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| CN105762512A true CN105762512A (en) | 2016-07-13 |
| CN105762512B CN105762512B (en) | 2019-03-08 |
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| CN106465556A (en) * | 2016-07-21 | 2017-02-22 | 北京小米移动软件有限公司 | Metal cover and electronic equipment |
| CN107425267A (en) * | 2017-09-08 | 2017-12-01 | 深圳天珑无线科技有限公司 | The antenna structure and mobile terminal of mobile terminal |
| CN107732417A (en) * | 2016-08-11 | 2018-02-23 | 北京小米移动软件有限公司 | Terminal device |
| CN108574134A (en) * | 2017-03-07 | 2018-09-25 | 北京小米移动软件有限公司 | Antenna and terminal device for terminal device |
| CN109216888A (en) * | 2017-06-29 | 2019-01-15 | 苹果公司 | Antenna tuning unit in patterned conductive layer |
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| US20150380820A1 (en) * | 2014-06-26 | 2015-12-31 | Htc Corporation | Mobile device and manufacturing method thereof |
| CN204271242U (en) * | 2014-12-29 | 2015-04-15 | 上海安费诺永亿通讯电子有限公司 | A kind of adjustable antenna for all-metal construction communication terminal device |
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| CN105762512B (en) | 2019-03-08 |
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