CN105932408B - A kind of metal edge frame LTE tuned antennas of high-isolation - Google Patents
A kind of metal edge frame LTE tuned antennas of high-isolation Download PDFInfo
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- CN105932408B CN105932408B CN201510950078.4A CN201510950078A CN105932408B CN 105932408 B CN105932408 B CN 105932408B CN 201510950078 A CN201510950078 A CN 201510950078A CN 105932408 B CN105932408 B CN 105932408B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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Abstract
The present invention provides a kind of novel LTE metal edge frame tuned antenna systems, are suitable for the mobile terminal with metal edge frame structure, which includes metal frame, pcb board and antenna part；The present invention is designed as metal edge frame a part for antenna radiator, is opened up on metal edge frame there are two gap, and setting low frequency branch is combined with metal frame generates low-frequency resonant, and setting high-frequency branch is combined with metal frame generates high-frequency resonant；The present invention uses IFA modes, and controls coupling power using tuning device to adjust the resonant frequency of low frequency.Advantageous effect of the present invention is：The gap of metal edge frame is opened in bottom, user is avoided and touches the influence that gap generates antenna performance in actual use；Using annular capacitor tuning manner, exciting radiation electric current is circulation circuit pattern, has not only expanded antenna low frequency bandwidth, but also also improve the low frequency isolation degree between LTE mimo antennas；It is provided with three ground connection raised zones between PCB and antenna and reduces the design space of antenna as far as possible for placing Cellphone Accessories loudspeaker, USB, vibration etc. around antenna；The working band of the present invention is 592 850MHz and 1700 2800MHz.
Description
Technical field
The invention belongs to antenna technical fields, and in particular to a kind of metal edge frame LTE tuned antennas of high-isolation.
Background technology
The multiple frequency broad band of mobile terminal antenna is always the developing direction of communication of mobile terminal, and especially Portable movable is whole
End, 3G have been current mainstreams, and frequency bandwidth is 824-960MHz and 1710-2170MHz.With answering for LTE technologies
With it is 600MHz-960MHz that low frequency, which requires bandwidth, and high frequency requirements bandwidth is 2170-2700MHz, and bandwidth increases sharply to day
Line design brings difficult point.
On the other hand, LTE communication standard uses newest OFDM and MIMO combination technologies, day with traditional communication difference
Isolation between line directly determines the realization of antenna performance.And traditional antenna generally uses Monopole, PIFA, this antenna
The electric current of form excitation is substantially along mainboard longest direction, especially low frequency, leads to no matter another antenna is placed on mainboard
What position, can all be influenced by the slow wave electric current that mainboard transmits, how solve the problems, such as that the isolation of LTE mimo antennas has become
For urgent need.
The portable terminal product of metal-like is constantly subjected to the favor of consumer because of its unique appearance and feel, still
Too many hardware is unfavorable for the design of antenna.And the demand based on moulding, mobile phone thickness is more and more thinner, the sky of antenna
Between it is also smaller and smaller, the environment around antenna also becomes increasingly complex.So integrating gold under complex environment in a limited space
Belong to structure, it is synchronous to consider user experience, the antenna of multifrequency is also needed to meet, and consider the isolation between antenna, is proposed to Antenna Design
Great challenge.
Invention content
In order to overcome defect existing in the prior art, the present invention to be carried under the premise of mobile terminal has metal edge frame
Gone out a kind of metal edge frame LTE tuned antennas of high-isolation, the antenna may be implemented working frequency range 592MHz-850MHz and
1700 MHz -2800MHz, and two almost symmetrical gaps are only opened on bottom metal frame.
Specific embodiments of the present invention are as follows：
A kind of metal edge frame LTE tuned antennas of high-isolation are suitable for the mobile terminal with metal edge frame structure, should
Antenna includes metal frame, pcb board and antenna part；
Metal frame includes the first frame, the second frame, third frame and the 4th frame, end to end successively respectively, formation
One metal frame.
Pcb board is arranged in metal frame, and PCB includes metallic region and empty regions, metal edge frame region and empty regions
One end of boundary corresponds to the junction of the first metal edge frame and the 4th metal edge frame, and the other end corresponds to third metal edge frame and the
The junction of four metal edge frames；
Antenna part includes feed section, coupling unit and spurious portion, and feed section includes that feed, the first feed are walked
Line, the second feed cabling, third feed cabling, the 4th feed cabling and ground connection cabling；Coupling unit includes low frequency coupling unit
With high-frequency coupling part, low frequency coupling unit includes that the first low frequency coupling branch and the second low frequency couple branch, the first low frequency coupling
It closes and is electrically connected between branch and the second low frequency coupling branch by playing needle or screw；High-frequency coupling part includes the first high frequency coupling
Branch and the second high-frequency coupling branch are closed, by playing needle or screw between the first high-frequency coupling branch and the second high-frequency coupling branch
Electrical connection；Spurious portion is USB parasitisms branch.
Scheme as an optimization, metal frame are wrapped in the surrounding of the mobile terminal, and there are two being opened on the 4th metal edge frame
Gap.
Scheme as an optimization is provided with the first coupling place, the junction of the first frame and the 4th frame in pcb board；If
It is equipped with the second coupling place, third frame and the 4th frame junction.
Scheme as an optimization, low frequency coupling unit include tuned radio-frequency device, the 4th feed cabling and the coupling of the first low frequency
Branch, tuned radio-frequency device are arranged on the flexible circuit of holder.
Scheme as an optimization, it is tuning capacitance or multi-channel switch to penetrate tuning device.
Scheme as an optimization, each resonance of antenna are all made of coupling feed way, low frequency part by feed cabling with it is low
Frequently the thin space coupling between the first coupling branch generates；First and second high-frequency resonant is by feeding cabling and the first high-frequency coupling
Coupling between branch generates, and third high frequency is generated by the coupling fed between cabling and USB parasitisms branch, is effectively increased
Isolation between LTE antenna.
Scheme as an optimization, the first feed cabling, third feed cabling, ground connection cabling, the first low frequency coupling branch, first
It is connected using thimble contact or shrapnel contact between high-frequency coupling branch and the 4th metal edge frame.
In some embodiments, there are three the position for placing metallic ground device, metal device, which may respectively be, to shake for antenna setting
Dynamic, USB and loudspeaker.
In some embodiments, tuning device is placed on mobile terminal holder, radio frequency input, output port respectively with feed
Cabling and the first low frequency coupling cabling connect, and need to only be fed to it by a direct-flow positive pole feed line.
In some embodiments, tuning device is placed on antenna headroom position, with pcb board same plane, radio frequency input, output
Port connects with feed cabling and the first low frequency coupling cabling respectively, and a direct-flow positive pole feed line is only needed to be fed i.e. to it
It can.
In some embodiments, third is fed cabling with the antenna and the first high-frequency coupling branch is arranged on holder, fits
When the length for adjusting branch can optimize the frequency bins of the first and second high frequency.
In some embodiments, antenna will increase parasitic branch, for increasing third high-frequency coupling intensity.
In some embodiments, third feed cabling is transformed into parasitic branch by antenna, for optimizing the second high-frequency resonant frequency
Rate.
Compared with prior art, the invention has the advantages that：
（1）The present invention is designed as metal edge frame a part for antenna radiator, and gap is opened in bottom, avoids user
The influence that touching gap generates antenna performance in use, and meet consumer and metal-like mobile terminal product is chased after
It asks.
（2）Low-frequency resonant of the present invention uses coupled modes, and the radiation current of excitation is all circulation circuit pattern, is improved
Isolation between LTE antenna.
（3）The present invention use tuned radio-frequency mode, low-frequency band have the restructural characteristic of wideband, and height frequency band resonance compared with
For independence, debugging is conveniently.
（4）The present invention is provided with three bulged areas below antenna, it is contemplated that antenna surrounding metal device loudspeaker,
The influence brought is placed in USB and vibration.
Description of the drawings
Fig. 1 is the structural schematic diagram of the metal frame of the present invention, pcb board and antenna；
Fig. 2 is the stereoscopic schematic diagram of the embodiment of the present invention 1；
Fig. 3 is the return loss plot of the embodiment of the present invention 1；
Fig. 4 is the low-frequency current schematic diagram of conventional PIFA antenna；
Fig. 5 is the LTE low-frequency current schematic diagrames of the embodiment of the present invention 1；
Fig. 6 is the three-dimensional structure diagram of the embodiment of the present invention 2；
Fig. 7 is the three-dimensional structure diagram of the embodiment of the present invention 3；
Specific implementation mode
Detailed description is of the invention by way of examples below in conjunction with the accompanying drawings.
Embodiment 1：
A kind of metal edge frame LTE tuned antennas of high-isolation are suitable for the mobile terminal with metal edge frame structure, should
Antenna system includes metal frame, pcb board and antenna part.
As shown in Figure 1, metal frame includes the first frame 102, the second frame 103, third frame 104 and the 4th frame 105,
It is end to end respectively, form a metal frame.In the present embodiment, by taking general mobile phone as an example, the size substantially 130mm of mobile phone ×
65mm, therefore metal frame is set as long L1 × wide W1=130mm × 65mm, as shown in Fig. 2, the height of metal frame is h=5mm.
As shown in Figure 1, pcb board is arranged in the metal frame, including metallic region 100 and empty regions 101, metal
One end of 101 boundary of frame region and empty regions corresponds to the junction of the first frame 102 and the 4th frame 105, the other end
The junction of corresponding third frame 103 and the 4th frame 105；In the present embodiment, width L2=8mm of empty regions 101.
It is provided with the first coupling place 111 in pcb board, is located at the junction of first frame, 102 and the 4th frame 105；It is provided with
Second coupling place 112, is located at 105 junction of third frame 104 and the 4th frame.
Antenna is made of feed section, coupling unit and spurious portion, and feed section includes that the feed of feed 200, first is walked
Line 201, second feeds cabling 202, third feed cabling the 203, the 4th feeds cabling 205 and ground connection cabling 204；Coupling part subpackage
Include the first low frequency coupling branch 304, the second low frequency coupling branch 305, the first high-frequency coupling branch 301 and the second high-frequency coupling point
Branch 302；Spurious portion is USB parasitisms branch 306.
Antenna cabling part includes low frequency part and high frequency section, and low frequency branch part includes the first feed cabling 201, penetrates
The low frequency that conversion tuner part 300, the first low frequency coupling branch 304, the second low frequency coupling branch 305 and a pcb board part form
Radiant loop, for generating low frequency；High-frequency branch part includes that the first feed cabling 201, second feeds cabling 202, third feedback
The high frequency radiation of electric cabling 203, the first high-frequency coupling branch 301, the second high-frequency coupling branch 302 and pcb board part composition
Circuit, for generating the first and second high band, USB parasitisms branch 306 is for generating third high band in addition.
Fig. 4 is the low-frequency current schematic diagram of conventional PIFA antenna, the PCB electric currents of low-frequency resonant be along PCB main board most
Long side, is in genesis analysis, still has extremely strong slow wave electric current to the antenna other end.And low frequency of the present invention uses capacitive coupling side
Formula realizes the loop checking installation of low-frequency resonant electric current so that the radiation current of PCB is mainly gathered in close to antenna part, and is in
Cross direction profiles, along pcb board longitudinal direction electric current then as the increase of distance is drastically reduced, LTE low frequencies greatly improved
Isolation, antenna low-frequency current schematic diagram is as shown in Figure 5.
Tuned radio-frequency device uses tuning capacitance in the present embodiment, but is not limited to tuning capacitance, can also be penetrated using multichannel
Frequency switch or PIN diode etc..
The antenna return loss of the present embodiment is as shown in Figure 3.As shown in figure 3, antenna can be in low frequency by tuning capacitance
Continuous tuning and high band cover 1700MHz -2800MHz between section 592MHz -850MHz.
Embodiment 2：
As shown in fig. 6, this implementation and embodiment 1 difference lies in：Tuned radio-frequency device 300 is located at antenna by embodiment 1
On holder, and tuned radio-frequency device is positioned close to the empty regions 101 on floor by this implementation, facilitates the direct current of active device
Feed is implemented.In addition, this implementation increases by a parasitic branch 303 for making up the inadequate of USB parasitisms branch stiffness of coupling, facilitate tune
Try third high-frequency resonant frequency.
Embodiment 3：
As shown in fig. 7, this implementation and embodiment 1 difference lies in：In addition to being arranged tuned radio-frequency in PCB empty regions
Outside, third feed cabling 203 is changed into high-frequency parasitic branch 203 by this implementation, and increase the second high band facilitates adjusting.
Disclosed above is only several specific embodiments of the application patent, any ability that however, this application is not limited to this
What the technical staff in domain can think variation, should all fall in the protection domain of the application.
Claims (4)
1. a kind of metal edge frame LTE tuned antennas of high-isolation are suitable for the mobile terminal with metal mount structure, feature
It is, which includes metal frame, pcb board and antenna part；
The metal frame includes the first frame, the second frame, third frame and the 4th frame, end to end successively respectively, formation
One metal frame；
The pcb board is arranged in the metal frame, and the PCB includes metallic region and empty regions, the metal edge frame area
Domain and one end of the empty regions boundary correspond to the junction of first frame and the 4th frame, described in the other end corresponds to
The junction of third frame and the 4th frame；
The antenna part includes feed section, coupling unit and spurious portion, and the feed section includes feed, the first feed
Cabling, the second feed cabling, third feed cabling, the 4th feed cabling and ground connection cabling；The coupling unit includes low frequency coupling
Part and high-frequency coupling part are closed, the low frequency coupling unit includes that the first low frequency coupling branch and the second low frequency couple branch,
First low frequency, which couples, to be electrically connected between branch and the second low frequency coupling branch by playing needle or screw；The high-frequency coupling part
Including the first high-frequency coupling branch and the second high-frequency coupling branch, between the first high-frequency coupling branch and the second high-frequency coupling branch
By playing needle or screw electrical connection；The spurious portion is parasitic branch;The 4th feed cabling and the coupling of the first low frequency
Bifurcation is equipped with a tuning device, and the tuning device can be tuning capacitance or multi-channel switch;
The antenna use coupling feed way, low frequency part by feed cabling couple branch with the first low frequency between it is narrow
Spacing realizes coupling circuit；First and second high frequency realizes coupling by the thin space fed between cabling and the first high-frequency coupling branch
Circuit is closed, third high frequency realizes coupling circuit by the mutual coupling fed between cabling and USB parasitisms branch;
The low-and high-frequency resonance of the antenna is all made of coupled resonance mode.
2. the metal edge frame LTE tuned antennas of high-isolation according to claim 1, which is characterized in that the metal frame
It is wrapped in the surrounding of the mobile terminal, and is driveed on the 4th frame there are two gap.
3. the metal edge frame LTE tuned antennas of high-isolation according to claim 1, it is characterised in that：In the pcb board
It is provided with the first coupling place, is located at the junction of first frame and the 4th frame；It is provided with the second coupling place, is located at
The third frame and the 4th frame junction.
4. the metal edge frame LTE tuned antennas of high-isolation according to claim 1, it is characterised in that：First feed is walked
It is used between line, third feed cabling, ground connection cabling, the first low frequency coupling branch, the first high-frequency coupling branch and the 4th frame
Thimble contact or shrapnel contact connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510950078.4A CN105932408B (en) | 2015-12-18 | 2015-12-18 | A kind of metal edge frame LTE tuned antennas of high-isolation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510950078.4A CN105932408B (en) | 2015-12-18 | 2015-12-18 | A kind of metal edge frame LTE tuned antennas of high-isolation |
Publications (2)
| Publication Number | Publication Date |
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| CN105932408A CN105932408A (en) | 2016-09-07 |
| CN105932408B true CN105932408B (en) | 2018-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510950078.4A Active CN105932408B (en) | 2015-12-18 | 2015-12-18 | A kind of metal edge frame LTE tuned antennas of high-isolation |
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| WO2018058300A1 (en) * | 2016-09-27 | 2018-04-05 | 北京小米移动软件有限公司 | Terminal housing and terminal |
| CN108023183B (en) * | 2016-10-31 | 2022-01-04 | 北京小米移动软件有限公司 | Antenna structure of mobile terminal and mobile terminal |
| CN106450746A (en) * | 2016-11-29 | 2017-02-22 | 广东工业大学 | LTE antenna with metal frame and mobile terminal |
| CN106972273B (en) * | 2017-01-19 | 2021-09-10 | 瑞声科技(新加坡)有限公司 | Antenna and mobile terminal |
| US11069955B2 (en) | 2017-03-20 | 2021-07-20 | Huawei Technologies Co., Ltd. | Antenna of mobile terminal and mobile terminal |
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| CN107359400B (en) * | 2017-06-27 | 2021-02-26 | 维沃移动通信有限公司 | Antenna and mobile terminal |
| CN107732434B (en) * | 2017-11-14 | 2023-09-12 | 深圳市信维通信股份有限公司 | All-metal four-in-one antenna |
| CN109980333A (en) | 2017-12-27 | 2019-07-05 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with the antenna structure |
| CN112042054B (en) * | 2018-04-28 | 2022-04-29 | 华为技术有限公司 | Antenna device and terminal equipment |
| CN108767499A (en) * | 2018-04-28 | 2018-11-06 | 华勤通讯技术有限公司 | Metal edge frame antenna and terminal device |
| CN110459856A (en) | 2018-05-08 | 2019-11-15 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with the antenna structure |
| CN109244682B (en) * | 2018-08-30 | 2023-12-19 | 深圳市信维通信股份有限公司 | Antenna capable of increasing bandwidth and mobile terminal adopting same |
| CN109004350A (en) * | 2018-08-30 | 2018-12-14 | 深圳市信维通信股份有限公司 | One kind is based on shielding small headroom metal edge frame antenna for mobile phone comprehensively |
| CN109066057B (en) * | 2018-09-28 | 2023-12-19 | 深圳市信维通信股份有限公司 | Three-in-one antenna based on metal frame under small clearance |
| CN109244665A (en) * | 2018-11-08 | 2019-01-18 | 深圳汉阳天线设计有限公司 | A kind of metal edge frame mimo antenna and mobile phone |
| CN111262016B (en) * | 2018-11-30 | 2022-12-09 | 北京小米移动软件有限公司 | Antenna and mobile terminal |
| CN109449595B (en) * | 2018-12-05 | 2023-11-24 | 深圳市信维通信股份有限公司 | MIMO antenna |
| CN109616750B (en) * | 2018-12-29 | 2023-06-27 | 普尔思（苏州）无线通讯产品有限公司 | Antenna structure |
| KR102606428B1 (en) | 2019-02-19 | 2023-11-29 | 삼성전자주식회사 | A plurality of antennas and electronic device including the same |
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| CN110943296B (en) * | 2019-11-29 | 2021-08-17 | 联想(北京)有限公司 | Electronic equipment |
| CN113675593B (en) * | 2020-05-14 | 2023-12-29 | 上海莫仕连接器有限公司 | Low-profile dual-band antenna device |
| CN112531321B (en) * | 2020-11-27 | 2022-05-06 | 捷开通讯(深圳)有限公司 | Antenna assembly and mobile terminal |
| CN112993577B (en) * | 2021-02-20 | 2024-01-19 | 惠州Tcl移动通信有限公司 | Antenna structure and terminal thereof |
| CN113629395B (en) * | 2021-10-11 | 2022-01-25 | 深圳市中天迅通信技术股份有限公司 | Antenna system for mobile terminal and mobile terminal |
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