CN104600440B - Mobile terminal and antenna structure thereof - Google Patents
Mobile terminal and antenna structure thereof Download PDFInfo
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- CN104600440B CN104600440B CN201510011385.6A CN201510011385A CN104600440B CN 104600440 B CN104600440 B CN 104600440B CN 201510011385 A CN201510011385 A CN 201510011385A CN 104600440 B CN104600440 B CN 104600440B
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Abstract
The invention discloses a kind of mobile terminal and antenna structure thereof, described antenna structure includes mainboard and is connected to the antenna body of described mainboard, also include the antenna tuning circuit between described mainboard and antenna body, described antenna tuning circuit includes tuning part and variable capacitance, described tuning part one end is directly connected to described mainboard, connects described mainboard by described variable capacitance after other end bending.Thus the resonant frequency of antenna can be affected, it is achieved that antenna frequencies adjustable by regulating the capacitance of variable capacitance, expand the beamwidth of antenna greatly, improve antenna efficiency, and the circuit structure of antenna structure is simple, easily realize, therefore realize low cost, stable performance.In addition, by the electronic device such as USB joint, mike being placed on tuning part, effectively reduce the impact on antenna of the electronic device such as USB joint, mike, improve antenna performance, also help the raising of the electronic device self performance such as USB joint, mike simultaneously.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of mobile terminal and antenna structure thereof.
Background technology
Along with the fast development of wireless communication technology, mobile phone standard by 2G to 3G again to 4G, antenna
Frequency range gets more and more, and the requirement to antenna multifrequency is more and more higher, and small size, the demand of multiband aerial are got over
Come the strongest.In order to expand the bandwidth of antenna, improve the performance of antenna, solution party more of the prior art
Case, the circuit structure complicated by design realizes the adjustable of antenna frequencies, it is achieved difficulty is bigger, it is achieved
Cost is high, and unstable properties.
And, in order to reduce the antenna impact on human body head, the main antenna of mobile terminal is normally at end
The bottom of end, and it is placed with the electronic device such as USB joint, mike in the bottom of terminal the most simultaneously, logical
Often it is positioned over antenna around or below so that these electronic devices have one to most sky and the efficiency of antenna
Fixed impact, reduces antenna performance.
Summary of the invention
Present invention is primarily targeted at a kind of mobile terminal of offer and antenna structure thereof, it is intended to simply
Circuit structure realizes the adjustable of antenna frequencies, improves antenna efficiency.
To achieve these objectives, the present invention proposes the antenna structure of a kind of mobile terminal, including mainboard and connection
In the antenna body of described mainboard, also include the antenna tuning electricity between described mainboard and antenna body
Road, described antenna tuning circuit includes tuning part and variable capacitance, and described tuning part one end is directly connected to institute
State mainboard, after other end bending, connect described mainboard by described variable capacitance.
Preferably, described tuning part is placed with the electronic device of described mobile terminal.
Preferably, described electronic device includes USB joint or/and mike.
Preferably, described tuning part is the tetragon of one end open, including being directly connected to the of described mainboard
A junction, connect the second connecting portion of described mainboard by described variable capacitance and connect described first
Connecting portion and the carrier of the second connecting portion, described electronic device is positioned on described carrier.
Preferably, described mainboard is wholely set with described tuning part, and described tuning part is that described mainboard is outside
The part extended.
Preferably, described tuning part is curved, or triangle in one end open, tetragon or polygon
Shape.
The present invention proposes a kind of mobile terminal simultaneously, and described mobile terminal includes an antenna structure, described sky
Line structure includes mainboard and is connected to the antenna body of described mainboard, also includes being positioned at described mainboard and antenna
Antenna tuning circuit between main body, described antenna tuning circuit includes tuning part and variable capacitance, described
Tuning part one end is directly connected to described mainboard, connects described master by described variable capacitance after other end bending
Plate.
A kind of antenna structure provided by the present invention, by variable capacitance and one end be directly connected to mainboard another
Connected the tuning part composition antenna tuning circuit of mainboard after holding bending by variable capacitance, can pass through regulation can
The capacitance that power transformation is held, affects the resonant frequency of antenna, it is achieved that antenna frequencies adjustable, opens up greatly
Opened up the beamwidth of antenna, improve antenna efficiency, and antenna structure circuit structure simple, easily realize,
Therefore low cost, stable performance are realized.Additionally, by the electronic device such as USB joint, mike is put
On tuning part, effectively reduce the impact on antenna of the electronic device such as USB joint, mike, improve
Antenna performance, also helps the raising of the electronic device self performance such as USB joint, mike simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of antenna structure one embodiment of mobile terminal of the present invention；
Fig. 2 is the schematic equivalent circuit of the lumped capacity of antenna structure in the embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings further
Explanation.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit
Determine the present invention.
Seeing Fig. 1, propose antenna structure one embodiment of mobile terminal of the present invention, described antenna structure includes
Mainboard 10, antenna body 20 and antenna tuning circuit, wherein antenna tuning circuit includes tuning part 30 He
Variable capacitance 40.
Mainboard 10 is main devices and the circuit placement region of mobile terminal, and main material is copper and sheet material.
In figure, dashed region is the most dummy section 11 of mainboard 10, is a part for mainboard 10, and this region 11 is general
Not spreading metal, predominantly antenna and provide more preferable radiation space, its size and shape can be according to actual needs
Change.
Antenna body 20 is the radiating principal of antenna, and it is connected to mainboard 10.Antenna body 20 and mainboard
The junction point of 10 is antenna feed access point, and radiofrequency signal is thus located to input antenna through microstrip line.Antenna body
20 can be conventional unipolar antenna or IFA antenna.In the present embodiment, antenna body 20 is L-shaped, it is also possible to
For other shape, do not limit at this.
Antenna tuning circuit is between mainboard 10 and antenna body 20, and its tuning part 30 one end directly connects
Connect mainboard 10, after other end bending, connect mainboard 10 by variable capacitance 40, so that tuning part 30,
Variable capacitance 40 and mainboard 10 form an annular region.The capacitance of variable capacitance 40 can be by mainboard 10
Interlock circuit be controlled adjust.Tuning part 30 can be curved, or triangle in one end open,
Tetragon or polygon, its main material can be copper and sheet material.In the present embodiment, tuning part 30 is in one
The tetragon of end opening, including the first connecting portion the 31, second connecting portion 32 and carrier 33, Qi Zhong
A junction 31 is directly connected to mainboard 10, and the second connecting portion 32 connects mainboard by variable capacitance 40, holds
Meet portion 33 and connect the first connecting portion 31 and the second connecting portion 32.As preferably, mainboard 10 in the present embodiment
Be wholely set with tuning part 30, i.e. tuning part 30 is the outward extending part of mainboard 10, with further
Simplify antenna structure.
The carrier 33 of tuning part 30 near antenna body 20, its minimum distance note with antenna body 20
For H1.Let it be assumed, for the purpose of illustration, that tune first connecting portion the 31, second connecting portion 32 of part 30 and hold
Meet portion 33 and be rectangle, and the length of the first connecting portion 31 and width are respectively L1 and W1, the second connecting portion
The length of 32 and wide respectively L2 and W2.
According to aerial radiation principle, change the electric capacity between antenna cabling and antenna reference ground, can affect
The resonant frequency of antenna.In the present embodiment, antenna cabling i.e. antenna body 20, antenna reference ground i.e. mainboard
10 mainly.Electric capacity between antenna body 20 and the main ground of mainboard 10, is mainly made up of two parts, first
Part is the direct distribution capacity between antenna body 20 and mainboard 10；Part II be by distance H1,
The lumped capacity that tuning part 30 and variable capacitance 40 are formed.The present embodiment is mainly adjusted by second
Electric capacity is divided to affect antenna frequencies.
It is illustrated in figure 2 the aforementioned second part electric capacity i.e. equivalent circuit of lumped capacity (for simplicity,
Equivalent circuit shown in Fig. 2 is only approximate equivalent circuit).Wherein, C0 represents the electric capacity of variable capacitance 40
Value, its capacitance can be controlled by interlock circuit on mainboard 10 and be adjusted；L represents the first of tuning part 30
The equivalent inductance value that connecting portion 31 produces, its inductance value size approximates with length L1 of the first connecting portion 31
Be directly proportional, width W1 is approximated to inverse ratio；L ' represents the equivalence that the second connecting portion 32 of tuning part 30 produces
Inductance value, it is near that its inductance value size and length L2 of the second connecting portion 32 are approximated to direct ratio, width W2
Seemingly it is inversely proportional to；Parasitic capacitance between the carrier 33 of C1 representative antennas main body 20 and tuning part 30
Capacitance, its capacitance size and distance H1 are approximated to inverse ratio.When changing the capacitance of electric capacity C0,
The capacitance size of whole circuit can be changed, and then affect the resonant frequency of antenna.Thus, it is achieved that sky
Line frequency adjustable, has expanded the beamwidth of antenna greatly, has improve antenna efficiency.And the sky of the present embodiment
The circuit structure of line structure is simple, easily realizes, therefore realizes low cost, stable performance.
Further, tuning part 30 is placed with the electronic device 50 of mobile terminal, as USB joint,
Mike etc..In the present embodiment, the electronic device such as USB joint, mike 50 is preferably placed on carrier
On 33, the connecting line 51 of electronic device 50 extends to mainboard 10 along carrier 33 and the first connecting portion 31,
It is connected with the interlock circuit on mainboard 10.Due to by electronics such as the USB joint of mobile terminal, mikes
Device 50 is placed on tuning part 30, therefore effectively reduces the electronic device such as USB joint, mike 50
Impact on antenna, improves antenna performance, also helps the electronics device such as USB joint, mike simultaneously
The raising of part self performance.
The present invention proposes a kind of mobile terminal simultaneously, and described mobile terminal includes an antenna structure, this antenna
Structure includes mainboard and is connected to the antenna body of mainboard, also includes between mainboard and antenna body
Antenna tuning circuit, antenna tuning circuit includes tuning part and variable capacitance, and tuning part one end is directly connected to
Mainboard, the other end bending after by variable capacitance connect mainboard, and tuning part on be placed with USB joint,
The electronic devices such as mike.Antenna structure described in the present embodiment is above-described embodiment institute in the present invention
The antenna structure related to, does not repeats them here.
The mobile terminal of the present embodiment, can affect the resonance of antenna by regulating the capacitance of variable capacitance
Frequency, it is achieved that antenna frequencies adjustable, has expanded the beamwidth of antenna greatly, has improve antenna efficiency,
And the circuit structure of antenna structure is simple, easily realizes, therefore realizes low cost, stable performance.With
Time, by being placed in by the electronic device such as USB joint, mike on tuning part, effectively reduce USB
The impact on antenna of the electronic device such as joint, mike, improves antenna performance, also helps USB simultaneously
The raising of the electronic device self performance such as joint, mike.
It should be appreciated that these are only the preferred embodiments of the present invention, it is impossible to therefore limit the present invention's
The scope of the claims, every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process become
Change, or be directly or indirectly used in other relevant technical fields, be the most in like manner included in the patent of the present invention
In protection domain.
Claims (7)
1. an antenna structure for mobile terminal, including mainboard and the antenna body being connected to described mainboard,
It is characterized in that, also include the antenna tuning circuit between described mainboard and antenna body, described sky
Line tuning circuit includes tuning part and variable capacitance, and described tuning part one end is directly connected to described mainboard, separately
Described mainboard, wherein, described antenna body and described master is connected by described variable capacitance after the bending of one end
The junction point of plate is antenna feed access point, and the capacitance of described variable capacitance is entered by the interlock circuit on described mainboard
Row controls to adjust.
Antenna structure the most according to claim 1, it is characterised in that be placed with on described tuning part
The electronic device of described mobile terminal.
Antenna structure the most according to claim 2, it is characterised in that described electronic device includes
USB joint is or/and mike.
Antenna structure the most according to claim 2, it is characterised in that described tuning part is that one end is opened
The tetragon of mouth, including being directly connected to the first connecting portion of described mainboard, being connected by described variable capacitance
Second connecting portion of described mainboard and connect described first connecting portion and the carrier of the second connecting portion, institute
State electronic device to be positioned on described carrier.
5. according to the antenna structure described in any one of claim 1-4, it is characterised in that described mainboard with
Described tuning part is wholely set, and described tuning part is the outward extending part of described mainboard.
6. according to the antenna structure described in any one of claim 1-3, it is characterised in that described tuning part
Curved, or triangle, tetragon or the polygon in one end open.
7. a mobile terminal, it is characterised in that include the antenna as described in any one of claim 1-6
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011385.6A CN104600440B (en) | 2015-01-09 | 2015-01-09 | Mobile terminal and antenna structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011385.6A CN104600440B (en) | 2015-01-09 | 2015-01-09 | Mobile terminal and antenna structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN104600440A CN104600440A (en) | 2015-05-06 |
| CN104600440B true CN104600440B (en) | 2016-08-24 |
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| CN201510011385.6A Active CN104600440B (en) | 2015-01-09 | 2015-01-09 | Mobile terminal and antenna structure thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410375A (en) * | 2015-07-30 | 2017-02-15 | 中兴通讯股份有限公司 | Antenna bandwidth debugging processing method and apparatus |
| CN105357355B (en) * | 2015-11-10 | 2018-06-12 | 广东欧珀移动通信有限公司 | The control method of communication terminal and its antenna assembly working condition, control device |
| CN106100662B (en) * | 2016-05-27 | 2018-11-09 | 上海传英信息技术有限公司 | Printed circuit board and wireless communication device with printed circuit board |
| CN106329062A (en) * | 2016-09-30 | 2017-01-11 | 努比亚技术有限公司 | Multi-frequency antenna structure and electronic device |
| CN106486773A (en) * | 2016-09-30 | 2017-03-08 | 努比亚技术有限公司 | A kind of mobile terminal and its antenna structure |
| CN108321515B (en) * | 2018-01-04 | 2021-06-15 | 瑞声科技(新加坡)有限公司 | Antenna system and mobile terminal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710644B (en) * | 2009-12-23 | 2012-10-03 | 华为终端有限公司 | Antenna and wireless communication device |
| US9450291B2 (en) * | 2011-07-25 | 2016-09-20 | Pulse Finland Oy | Multiband slot loop antenna apparatus and methods |
| CN103187615B (en) * | 2011-12-31 | 2016-07-27 | 华为终端有限公司 | Antenna and manufacture method, printed circuit board (PCB), communication terminal |
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Address after: A District No. 9018 Han innovation building in Nanshan District high tech Zone in Shenzhen city of Guangdong Province, North Central Avenue, 518000 floor 10 Applicant after: Nubian Technologies Ltd. Address before: A District No. 9018 Han innovation building in Nanshan District high tech Zone in Shenzhen city of Guangdong Province, North Central Avenue, 518000 floor 10 Applicant before: Shenzhen ZTE Mobile Tech Co., Ltd. |
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