CN105552516B - A kind of antenna and mobile terminal - Google Patents

A kind of antenna and mobile terminal Download PDF

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Publication number
CN105552516B
CN105552516B CN201510466799.8A CN201510466799A CN105552516B CN 105552516 B CN105552516 B CN 105552516B CN 201510466799 A CN201510466799 A CN 201510466799A CN 105552516 B CN105552516 B CN 105552516B
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CN
China
Prior art keywords
mobile terminal
antenna
metal
tuner section
back cover
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Application number
CN201510466799.8A
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Chinese (zh)
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CN105552516A (en
Inventor
李克
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Priority to CN201510466799.8A priority Critical patent/CN105552516B/en
Priority to PCT/CN2015/091356 priority patent/WO2017020425A1/en
Publication of CN105552516A publication Critical patent/CN105552516A/en
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/44Details 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/50Structural association of antennas with earthing switches, lead-in devices or lightning protectors

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  • Support Of Aerials (AREA)
  • Telephone Set Structure (AREA)

Abstract

The embodiment of the invention discloses a kind of antenna and mobile terminals, the antenna includes: metal routing, inside mobile terminal, it connect and conducts without breakpoint metal center with the closed loop of the mobile terminal, and pass through the circuit board electrical connection in feeding point and the mobile terminal, for adjusting the resonance frequency of the antenna, wherein, the circuit board is located between the structural support metal plate in the mobile terminal and the metal back cover of the mobile terminal, the structural support metal plate connect and conducts with the metal back cover, the reference ground of the structural support metal plate and the metal back cover as the mobile terminal;The closed loop is without breakpoint metal center, for the radiator as the antenna, transmitting and reception signal.Using the present invention, mobile terminal can be under the premise of using closed loop without breakpoint metal center and metal back cover, it is ensured that antenna radiation performance.

Description

A kind of antenna and mobile terminal
Technical field
The present invention relates to field of communication technology more particularly to a kind of antennas and mobile terminal.
Background technique
Requirement with user to mobile terminal appearance is continuously improved, and the Cell Phone Design of metal shell is with its special hand Sense, texture and metallic luster are very big to the attraction of user.Therefore the mobile terminal of more and more metal appearances appears in market On.
But in order to avoid closing the partition of conductor opponent machine signal, the metal center of number mobile terminals big absolutely have plastic cement every Breakpoint, the metal center of only only a few mobile terminal are closed loops without breakpoint.The existing use announced is in no breakpoint The mobile terminal of frame is all often to use annular or slot antenna, and do not support metal back cover, such as application number 201310472716.7 (radio-based electronic devices with the metal circumference including mutiple antennas) and 201310126183.7 (movements The slot antenna device and mobile terminal of terminal), although meeting demand of the metal center without breakpoint in appearance, it is unable to satisfy The demand of metal back cover, and merely with the simple realization of slot antenna, i.e., frame border is cracked gap in a metal, and this realization needs Change gap size to adjust antenna resonant frequency, it is inflexible, and also the radiance of this slot antenna is relatively weak, The crack design of gap of center border can also generate obvious reduction on complete machine structure intensity and influence.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing a kind of antenna and mobile terminal.To solve movement The problem of terminal is for metal appearance design and antenna performance demand.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of antennas, comprising:
Metal routing is located inside mobile terminal, connect with the closed loop of the mobile terminal without breakpoint metal center and electric Conducting, and by the circuit board electrical connection in feeding point and the mobile terminal, for adjusting the resonance frequency of the antenna, In, the circuit board is located between the structural support metal plate in the mobile terminal and the metal back cover of the mobile terminal, The structural support metal plate connect and conducts with the metal back cover, the structural support metal plate and the metal back cover Reference ground as the mobile terminal;
The closed loop is without breakpoint metal center, for the radiator as the antenna, transmitting and reception signal.
Wherein, the metal routing includes the first tuner section and the second tuner section, and first tuner section is used for so that institute The working frequency range covering low-frequency range of antenna is stated, second tuner section is used for so that the working frequency range of the antenna covers high frequency Section.
Wherein, track lengths of first tuner section and second tuner section and/or of different size.
Wherein, the metal routing for including in first tuner section and second tuner section is in winding setting.
Wherein, bottom mutually separate with position where earpiece in the mobile terminal is arranged in the metal routing.
Wherein, the material of the metal routing is stainless steel, copper, nickel-clad copper or gold plated copper.
The embodiment of the invention also provides a kind of mobile terminals, including antenna as described above.
The implementation of the embodiments of the present invention has the following beneficial effects:
Entire antenna is made of closed loop without breakpoint metal center and metal routing, the structural support metal built in mobile terminal The reference ground of plate and metal back cover as mobile terminal, closed loop is to be physically connected to without breakpoint metal center and structural support metal plate And conduct, so closed loop is without a part that breakpoint metal center is also with reference to ground.Closed loop is without breakpoint metal center as master The antenna radiator wanted, metal routing adjust resonance frequency by changing size and shape.To realize closed loop without breakpoint Metal center and the design of the metal appearance of metal back cover, while ensuring the radiance of antenna, greatly improve mobile terminal The structural strength of fuselage;And feed structure design is simple, can be realized by the adjustment to metal routing to resonance frequency It is adjusted flexibly.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.
Fig. 1 is the stereoscopic schematic diagram of inventive antenna structure;
Fig. 2 is the floor map of inventive antenna structure;
Fig. 3 is the result schematic diagram that return loss test is carried out using inventive antenna.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The concrete composition and connection relationship of antenna of the embodiment of the present invention are introduced below in conjunction in Fig. 1 and Fig. 2, and Antenna performance is tested by the return loss test of Fig. 3.
Fig. 1 is please referred to, is the stereoscopic schematic diagram of inventive antenna structure, in the present embodiment, the antenna includes:
Metal routing 100 is located inside mobile terminal, connects with the closed loop of the mobile terminal without breakpoint metal center 200 It connects and conducts, and by the circuit board electrical connection in feeding point (Fig. 1 is not indicated) and the mobile terminal, it is described for adjusting The resonance frequency of antenna, wherein the circuit board is located at structural support metal plate 300 and the movement in the mobile terminal Between the metal back cover 400 of terminal, the structural support metal plate 300 connect and conducts with the metal back cover 400, described The reference ground of structural support metal plate 300 and the metal back cover 400 as the mobile terminal;The metal back cover 400 can With covering part or the back of whole mobile terminals.
The closed loop is without breakpoint metal center 200, for the radiator as the antenna, transmitting and reception signal.
Wherein, mobile terminal can be the smart phone or tablet computer for having communication function.
Optionally, the metal routing 100 can be divided into two tuner section, can by shape to metal routing 100 and Size is adjusted to cover several frequency ranges, such as low frequency 1, low frequency 2, low frequency 3, high frequency 1, high frequency 2 and high frequency 3.Certainly, even Metal routing 100 can also be divided to the tuner section for 2 or more, respectively correspond different frequency ranges.
Optionally, in the vpg connection of tuner section, other than the tie point with other component, each tuner section includes Metal routing can be arranged in winding.To sufficiently save the inner space of mobile terminal, returning for fold-line-shaped specifically may be configured as Ring may be set to be curved winding.It is, of course, also possible to be arranged to other shapes, such as strip, triangle, only need Ensure to be able to achieve the covering to different frequency range in certain space.In terms of the size of tuner section, specifically may include Length and width can be covered by the adjustment of shape and size to tuner section and want covering frequency range.To meet future The specific setting of the performance requirement of the various network formats of mobile terminal, the shape and size of tuner section can be tested and be tested It arrives.So as to very flexibly adjustment resonance frequency.
Optionally, bottom mutually separate with position where earpiece in the mobile terminal is arranged in the metal routing 100. It should be noted that towards the one end on ground when bottom herein refers to user's normal hand mobile terminal, and earpiece is general It is arranged at the top of mobile terminal.By showing that mobile terminal, the test of electric current is found, low frequency and high frequency show that electric current is all main Closed loop is distributed in without on breakpoint metal center 200 and metal routing 100, since the present embodiment designs metal routing in movement The bottom of terminal, closed loop is less without 200 two sides of breakpoint metal center, that is, user's handgrip part current distribution, therefore user is hand-held Current loss is small when mobile terminal, influences on antenna performance also just less;Similarly, since antenna is located at bottom, user makes The position that human ear is touched when being answered or made a phone call with mobile terminal is the more bottom loss of current distribution at the top of mobile terminal It is small, therefore use the hand of the mobile terminal of antenna described in embodiment of the present invention damage (damage of the manpower to aerial signal when hand held terminal Consumption) and head damage (pasting the ear loss of the number of people to aerial signal when making a phone call) it is all relatively small, and the damage of right-hand man and left and right head Consumption is all more balanced, can meet the needs of antenna performance is continuously improved in mobile terminal well.
Optionally, the material of the metal routing 100 can include but is not limited to stainless steel, copper, nickel-clad copper or gold plated copper.
It is described in detail below with reference to connection relationship of the Fig. 2 to antenna and mobile terminal other component.
It referring to figure 2., is the floor map of inventive antenna structure, in the present embodiment, the antenna includes:
Metal routing 100 is located inside mobile terminal, connects with the closed loop of the mobile terminal without breakpoint metal center 200 It connects and conducts, and by the circuit board electrical connection in feeding point 104 and the mobile terminal, for adjusting the humorous of the antenna Vibration frequency, wherein the circuit board is located at the metal of structural support metal plate and the mobile terminal in the mobile terminal Between back-cover, the structural support metal plate connect and conducts with the metal back cover, the structural support metal plate and institute State reference ground of the metal back cover as the mobile terminal;
The closed loop is without breakpoint metal center 200, for the radiator as the antenna, transmitting and reception signal.
Specifically, the metal routing 100 may include the first tuner section 101 and the second tuner section 102, and described first adjusts Humorous portion 101 is used for so that the working frequency range of the antenna covers low-frequency range, and second tuner section 102 is used for so that the antenna Working frequency range cover high band.
The metal routing for including in first tuner section 101 and second tuner section 102 is in winding setting.
When adjusting resonance frequency to cover high and low frequency, first tuner section 101 and second tuner section 102 Track lengths and/or width can be different.Or the adjustment of resonance frequency can also be carried out by the shape of the two, certainly, The size and shape of the two can also be adjusted simultaneously.
In the present embodiment, the first tuner section 101 and the second tuner section 102 are respectively by tie point 103 and closed loop without disconnected Point metal center 200 connects.The feeding point 104 is arranged in the second tuner section 102, passes through the circuit of feeder line and mobile terminal Plate connection.
Bottom mutually separate with position where earpiece in the mobile terminal is arranged in the metal routing 100.
In the present embodiment, entire antenna is made of closed loop without breakpoint metal center 200 and metal routing 100, closed loop without Breakpoint metal center 200 is used as main antenna radiator, and metal routing 100 adjusts resonance frequency by changing size and shape Rate.The reference ground of structural support metal plate 300 and metal back cover 400 as mobile terminal built in mobile terminal, closed loop is without disconnected Point metal center 200 and structural support metal plate are physically connected to and conduct, so closed loop is without breakpoint metal center 200 It is a part with reference to ground, the working principle of the antenna is that eradiation is theoretical (present invention proposes a kind of new theory of radiation), i.e., Using part with reference to (closed loop is without breakpoint metal center 200) as the major radiator of antenna, using 100 pairs of days of metal routing Line resonance frequency is adjusted.To realize the metal appearance design that closed loop is covered without breakpoint metal center and metal, simultaneously The radiance for ensuring antenna greatly improves the structural strength of mobile Terminals;And feed structure design is simple, passes through The adjustment of metal routing may be implemented that resonance frequency is adjusted flexibly;Metal routing is arranged in mobile terminal bottom, it can The hand damage and head damage of mobile terminal are reduced, and the hand of right-hand man damages relative equilibrium.
After above-mentioned connection and setting, echo damage can be carried out using the mobile terminal of antenna described in the present embodiment Consumption test.
Referring to figure 3., the result schematic diagram to carry out return loss test using inventive antenna.
Return loss is to indicate the parameter of signal reflex performance.Return loss illustrates that a part of incident power is reflected back toward To signal source.For example, if injecting 1mW (0dBm) power to amplifier, wherein 10% is reflected (rebound) back, return loss It is exactly 10dB.In terms of mathematical angle, return loss is -10lg [(reflection power)/(incident power)].Return loss is usually defeated Enter and export and is all provided.Although entitled loss, its numerical value is bigger to illustrate that performance is better.
As shown in figure 3, abscissa is frequency, ordinate is return loss, respectively to low frequency 1, high frequency 1, high frequency 2 and high frequency It is found that the absolute value of return loss is approximately equal to 10 or greater than 10, performance is preferable, can meet mobile terminal completely to day for 3 tests The linearly demand of energy.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight Point explanation is all differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For device embodiment, since it is basically similar to the method embodiment, so being described relatively simple, related place referring to The part of embodiment of the method illustrates.
Description through the foregoing embodiment, the invention has the following advantages that
Entire antenna is made of closed loop without breakpoint metal center and metal routing, the structural support metal built in mobile terminal The reference ground of plate and metal back cover as mobile terminal, closed loop is to be physically connected to without breakpoint metal center and structural support metal plate And conduct, so closed loop is without a part that breakpoint metal center is also with reference to ground.Closed loop is without breakpoint metal center as master The antenna radiator wanted, metal routing adjust resonance frequency by changing size and shape.To realize closed loop without breakpoint Metal center and the design of the metal appearance of metal back cover, while ensuring the radiance of antenna, greatly improve mobile terminal The structural strength of fuselage;And feed structure design is simple, and the spirit to resonance frequency may be implemented by the adjustment to metal routing Adjustment living;By metal routing setting in mobile terminal bottom, the hand damage and head damage of mobile terminal, and the hand damage of right-hand man can be reduced Relative equilibrium.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic Dish, CD, read-only memory (Read-Only Memory, abbreviation ROM) or random access memory (Random Access Memory, abbreviation RAM) etc..
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.

Claims (7)

1. a kind of antenna characterized by comprising
Metal routing is located inside mobile terminal, and the closed loop of the metal routing and the mobile terminal is without breakpoint metal center It connects and conducts, and the metal routing passes through the circuit board electrical connection in feeding point and the mobile terminal, the gold Belong to the resonance frequency that cabling is used to adjust the antenna, wherein the circuit board is located at the structural support in the mobile terminal Between metal plate and the metal back cover of the mobile terminal, the structural support metal plate is connect with the metal back cover and conductance It is logical, the reference ground of the structural support metal plate and the metal back cover as the mobile terminal;
The closed loop is without breakpoint metal center, for the radiator as the antenna, transmitting and reception signal.
2. antenna as described in claim 1, which is characterized in that the metal routing includes the first tuner section and the second tuning Portion, first tuner section be used for so that the antenna working frequency range cover low-frequency range, second tuner section be used for so that The working frequency range of the antenna covers high band.
3. antenna as claimed in claim 2, which is characterized in that first tuner section walks wire length with second tuner section It spends and/or of different size.
4. antenna as claimed in claim 3, which is characterized in that include in first tuner section and second tuner section Metal routing is in winding setting.
5. antenna according to any one of claims 1-4, which is characterized in that the metal routing is arranged in the mobile terminal In the mutually separate bottom in position where with earpiece.
6. antenna as claimed in claim 5, which is characterized in that the material of the metal routing be stainless steel, copper, nickel-clad copper or Gold plated copper.
7. a kind of mobile terminal, which is characterized in that the mobile terminal includes the antenna as described in claim any one of 1-6.
CN201510466799.8A 2015-07-31 2015-07-31 A kind of antenna and mobile terminal Active CN105552516B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201510466799.8A CN105552516B (en) 2015-07-31 2015-07-31 A kind of antenna and mobile terminal
PCT/CN2015/091356 WO2017020425A1 (en) 2015-07-31 2015-09-30 Antenna and mobile terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510466799.8A CN105552516B (en) 2015-07-31 2015-07-31 A kind of antenna and mobile terminal

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CN105552516A CN105552516A (en) 2016-05-04
CN105552516B true CN105552516B (en) 2019-03-22

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WO (1) WO2017020425A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105680152B (en) * 2016-03-11 2019-03-01 北京小米移动软件有限公司 Terminal back-cover and its mobile terminal
CN109411882B (en) * 2018-11-19 2024-03-12 惠州硕贝德无线科技股份有限公司 Dual-frequency antenna structure for 5G metal frame mobile phone terminal
CN114006960B (en) * 2020-07-28 2023-04-28 华为技术有限公司 Electronic equipment
CN112072304B (en) * 2020-10-20 2023-02-28 北京字节跳动网络技术有限公司 Terminal device
CN112526226A (en) * 2020-11-17 2021-03-19 惠州Tcl移动通信有限公司 Method and system for detecting influence of metal coating of battery cover on antenna performance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201766163U (en) * 2010-08-03 2011-03-16 中兴通讯股份有限公司 Internal antenna and mobile terminal
CN103606736A (en) * 2013-09-18 2014-02-26 上海安费诺永亿通讯电子有限公司 Novel LTE antenna with all-metal frame
CN104064855A (en) * 2014-05-27 2014-09-24 普尔思(苏州)无线通讯产品有限公司 LTE-4G antenna for mobile phone with seamless metal ring

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6686886B2 (en) * 2001-05-29 2004-02-03 International Business Machines Corporation Integrated antenna for laptop applications
CN102956954B (en) * 2011-08-17 2015-08-26 联想(北京)有限公司 Antenna assembly and terminal equipment
US9203456B2 (en) * 2012-09-25 2015-12-01 Htc Corporation Mobile device
TWI617085B (en) * 2013-05-31 2018-03-01 群邁通訊股份有限公司 Antenna structure and wireless communication device using same
CN203434270U (en) * 2013-09-13 2014-02-12 广东欧珀移动通信有限公司 Coupling feed-in type mobile terminal antenna apparatus
CN104701619B (en) * 2014-12-31 2017-08-01 东莞劲胜精密组件股份有限公司 A kind of loop checking installation closure wireloop antenna and mobile device
CN105305065A (en) * 2015-09-28 2016-02-03 宇龙计算机通信科技(深圳)有限公司 Mobile terminal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201766163U (en) * 2010-08-03 2011-03-16 中兴通讯股份有限公司 Internal antenna and mobile terminal
CN103606736A (en) * 2013-09-18 2014-02-26 上海安费诺永亿通讯电子有限公司 Novel LTE antenna with all-metal frame
CN104064855A (en) * 2014-05-27 2014-09-24 普尔思(苏州)无线通讯产品有限公司 LTE-4G antenna for mobile phone with seamless metal ring

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WO2017020425A1 (en) 2017-02-09
CN105552516A (en) 2016-05-04

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