CN106099319A - A kind of tunable antenna and mobile terminal - Google Patents
A kind of tunable antenna and mobile terminal Download PDFInfo
- Publication number
- CN106099319A CN106099319A CN201610535002.XA CN201610535002A CN106099319A CN 106099319 A CN106099319 A CN 106099319A CN 201610535002 A CN201610535002 A CN 201610535002A CN 106099319 A CN106099319 A CN 106099319A
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- antenna
- mobile terminal
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- tunable
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- 239000002184 metal Substances 0.000 claims abstract description 67
- 230000003071 parasitic effect Effects 0.000 claims abstract description 43
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 230000001276 controlling effect Effects 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
Abstract
The embodiment of the present invention provides a kind of tunable antenna and mobile terminal, belongs to antenna technical field.Described mobile terminal includes mainboard, metal frame and metal center, and described tunable antenna includes: antenna body, is connected with described mainboard, and arranges antenna headroom in described mobile terminal；Passive antenna, metal frame and/or metal center by described mobile terminal are constituted；Duplexer, controls logical state and the off-state of described passive antenna；Parasitic match circuit, for regulating and controlling the resonance of described passive antenna, couples to regulate and control the resonance of described tunable antenna with described antenna body by described passive antenna.The present invention is by regulating and controlling the resonance of passive antenna flexibly and effectively, thus ensure the performance of tunable antenna and mobile terminal, and the present invention can effectively apply to little clearance antenna environment, so that antenna takies less space, allow the more compact of overall design, strengthen the market competitiveness of mobile terminal.
Description
Technical Field
The embodiment of the invention relates to the technical field of antennas, in particular to a tunable antenna and a mobile terminal.
Background
The radio frequency signal energy output by the radio transmitter is transmitted to the antenna through a feeder (cable) and radiated out by the antenna in the form of electromagnetic waves. After reaching the receiving location, the electromagnetic waves are received by the antenna and fed to the radio receiver by the feeder. It can be seen that an antenna is an important radio device for transmitting and receiving electromagnetic waves.
Mobile terminals have become one of the indispensable electronic devices in people's daily lives, and various mobile terminal manufacturers are currently pursuing an aesthetic appearance and a compact internal stack for the design of mobile terminals. The mobile terminal is continuously connected with the base station, and receives and transmits electromagnetic waves through the antenna of the mobile terminal, the old mobile terminal is provided with a convex antenna, and most of the antennas of the new mobile terminal are hidden in the body.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: the control of the length, width and thickness of the mobile terminal and the application of the metal shell inevitably compress the space of the antenna hidden in the body, and the adjustability of the antenna is reduced. The requirement on the frequency band of the antenna is very wide at present, and the difficulty in ensuring the performance of the antenna is very high under the conditions of adjustability and space deterioration.
Disclosure of Invention
The embodiment of the invention provides a tunable antenna and a mobile terminal, which can ensure the performance of the tunable antenna and the mobile terminal by flexibly and effectively regulating and controlling the resonance of a parasitic antenna, and can be effectively applied to a small clearance antenna environment, so that the antenna occupies smaller space, the whole machine design is more compact, and the market competitiveness of the mobile terminal is enhanced.
The embodiment of the invention provides a tunable antenna which is applied to a mobile terminal, wherein the mobile terminal comprises a main board, a metal frame and a metal middle frame, and the tunable antenna comprises:
the antenna body is connected with the mainboard, and an antenna clearance is arranged in the mobile terminal;
the parasitic antenna is formed by a metal frame and/or a metal middle frame of the mobile terminal;
an antenna switch for controlling the on state and the off state of the parasitic antenna;
and the parasitic matching circuit is used for regulating and controlling the resonance of the parasitic antenna, and the parasitic antenna is coupled with the antenna body to regulate and control the resonance of the tunable antenna.
Further, the parasitic matching circuit comprises an inductor and/or a capacitor, resonance of the parasitic antenna is regulated by configuring different capacitance values and/or inductance values, and resonance of the tunable antenna is regulated by coupling the parasitic antenna with the antenna body.
Furthermore, the parasitic matching circuit is located between the metal frame and the metal middle frame, and the electric length of the parasitic antenna is regulated and controlled by regulating and controlling different matching values, so that the resonance of the parasitic antenna is changed.
Further, the antenna body includes an antenna trace, an antenna ground and a feed point, wherein the antenna ground is grounded.
Further, the antenna clearance is 3 mm-10 mm.
An embodiment of the present invention further provides a mobile terminal, including the tunable antenna as described above.
Furthermore, a gap is reserved between the metal middle frame and the metal frame.
Further, a broken seam is arranged on the metal frame of the mobile terminal.
Furthermore, a first broken joint and a second broken joint are arranged on the metal frame, and the width of the first broken joint and the width of the second broken joint are 0.8-2 mm.
Further, a connection point is arranged between the metal frame and the metal middle frame.
According to the tunable antenna and the mobile terminal provided by the embodiment of the invention, the switch and the related electric element are added between the structural components, the electric connection mode of the inherent metal structural component is changed by adjusting different switch logic states and/or values of the electric element, the resonance position of the parasitic antenna is flexibly and effectively regulated, the performance of the tunable antenna and the mobile terminal is ensured, and the tunable antenna and the mobile terminal can be effectively applied to a small clearance antenna environment, so that the antenna occupies a smaller space, the whole machine is designed to be more compact, and the market competitiveness of a machine is enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a perspective view of a mobile terminal with a tunable antenna according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of another view of a mobile terminal with a tunable antenna according to an embodiment of the present invention.
Fig. 3 is a partial structural diagram of a mobile terminal with a tunable antenna in an embodiment of the invention with an analog switch off.
Fig. 4 is a partial schematic diagram of the communication of the analog switch of the mobile terminal with the tunable antenna according to the embodiment of the present invention.
Fig. 5 is a schematic diagram of a partial structure of a mobile terminal with a tunable antenna simulating communication via an inductor and/or a capacitor in an embodiment of the present invention.
Fig. 6 is a schematic diagram of matching of a tunable antenna according to an embodiment of the present invention.
Fig. 7 is a comparison graph of tunable antennas for different device values of electrical components and switch on and off analog for connection point locations.
Fig. 8 is a graph comparing the total efficiency of the five-state tunable antenna of fig. 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a tunable antenna which is applied to a mobile terminal, wherein the mobile terminal comprises a main board, a metal frame and a metal middle frame, and the tunable antenna comprises:
the antenna body is connected with the mainboard, and an antenna clearance is arranged in the mobile terminal;
the parasitic antenna is formed by a metal frame and/or a metal middle frame of the mobile terminal;
an antenna switch for controlling the on state and the off state of the parasitic antenna;
and the parasitic matching circuit is used for regulating and controlling the resonance of the parasitic antenna, and the parasitic antenna is coupled with the antenna body to regulate and control the resonance of the tunable antenna.
Wherein,
the parasitic matching circuit comprises an inductor and/or a capacitor, resonance of the parasitic antenna is regulated and controlled by configuring different capacitance values and/or inductance values, and resonance of the tunable antenna is regulated and controlled by coupling the parasitic antenna with the antenna body.
The parasitic matching circuit is positioned between the metal frame and the metal middle frame, and adjusts and controls the electrical length of the parasitic antenna by adjusting and controlling different matching values, so as to change the resonance of the parasitic antenna.
The antenna body comprises an antenna routing, an antenna ground leg and a feed point, wherein the antenna ground leg is grounded.
The antenna clearance is 3 mm-10 mm.
An embodiment of the present invention further provides a mobile terminal, including the tunable antenna as described above.
Wherein,
and a gap is reserved between the metal middle frame and the metal frame.
And a broken seam is arranged on the metal frame of the mobile terminal.
The metal frame is provided with a first broken joint and a second broken joint, and the width of the first broken joint and the width of the second broken joint are 0.8-2 mm.
And a connecting point is arranged between the metal frame and the metal middle frame.
The present invention will be further described with reference to specific examples.
Example one
Fig. 1 and 2 are schematic structural diagrams of a mobile terminal with a parasitic antenna according to an embodiment of the present invention. As shown in fig. 1 and fig. 2, in an embodiment of the present invention, a mobile terminal includes:
the metal frame 100 is preferably 7mm thick, and the wall thickness of the metal frame is 0.8 mm;
the metal middle frame 200 is preferably spaced from the metal frame 100 by a gap of 0.5 mm;
an antenna body 300;
antenna headroom 400, preferably 3 mm;
a first break 501, preferably 1.3mm wide;
a second break 502, preferably 1.3mm in width;
a first connection point 601, which is a connection point between the metal frame 100 and the metal middle frame 200;
a second connection point 602, which is a connection point between the metal frame 100 and the metal middle frame 200;
a third connection point 603, which is a connection point between the metal frame 100 and the metal middle frame 200;
a fourth connection point 604, which is a connection point between the metal frame 100 and the metal middle frame 200;
the fifth connection point 605 is a connection point between the metal frame 100 and the metal middle frame 200.
In the embodiment of the present invention, the metal frame 100 is connected to the metal middle frame 200, the connection manner may be screw connection, and the connection points may be connected through five points 601 and 605 as shown in the figure, although the connection manner, the number and the distribution of the connection points may also have other manners, which is not limited herein.
The housing of a mobile terminal is usually provided with a break, which mainly ensures that the antenna signal can be radiated or received efficiently. In this embodiment, the metal frame 100 further includes a first broken seam 501 and a second broken seam 502, and preferably, the width of the first broken seam 501 and the second broken seam 502 is 0.8mm to 2mm, and preferably 1.3 mm. Of course, the number, width and distribution of the broken seams may be in other manners, and are not limited in particular.
The tunable antenna is built in the mobile terminal, and the tunable antenna has a clearance area, which means that no device or grounding wire is arranged around and on a vertical projection plane. In this embodiment, the antenna clearance 400 keeps the metal frame 100 and the metal middle frame 200 away from the antenna body 300, and the antenna clearance is 3mm to 10mm, preferably 3 mm. Of course, the antenna headroom may have other values, and is not limited herein. The invention can be effectively applied to small clearance, thereby leading the antenna to occupy smaller space, leading the design of the whole machine to be more compact and enhancing the market competitiveness of the machine.
Example two
Fig. 3 to 5 are schematic partial structures of a mobile terminal according to an embodiment of the present invention.
On the basis of fig. 1 and fig. 2, as shown in fig. 3, the mobile terminal in this embodiment further includes:
an antenna trace 301;
the antenna ground is connected in series with a 3nH inductor ground 302;
a feed point 303;
the switch is connected to the electrical component (or components) at location 700.
Fig. 3 shows the original connection mode, in which the connection point 700 between the metal frame 100 and the metal middle frame 200 near the edge of the metal middle frame 200 is disconnected, which is also the open (open) state of the analog switch in this embodiment.
Fig. 4 shows connection point 700 as being in the short state, which in the exemplary embodiment is also the connected (short) state of the analog switch.
Fig. 5 shows that the connection point 700 is switched on by an electrical element.
In fig. 3 to 5, a parasitic antenna of the antenna body may be formed by an inherent structure of the metal frame and/or the metal middle frame of the mobile terminal. In the prior art, the impedance of the antenna body is usually adjusted, and the resonance generated by parasitic branches formed by the inherent length of the structural member cannot play a remarkable tuning role.
In this embodiment, fig. 6 is a matching schematic diagram of the tunable antenna, where the electrical components include inductors and/or capacitors, but the topology of the electrical components and the device types, and the device values are not limited thereto.
The resonance of the antenna body is regulated and controlled by configuring different capacitors and/or inductance values, and then the parasitic antenna is coupled with the antenna body by the parasitic matching circuit, so that the resonance of the mobile terminal antenna can be regulated and controlled, and the defect that the antenna body can only be regulated in the prior art is overcome.
Fig. 7 is a comparison of antenna S11 for different device values simulating switch on and off and electrical components for connection point 700 position. As shown in fig. 7, in the present embodiment, five different states of the mobile terminal antenna with respect to the position of the connection point 700 include a switch short state, a switch open state, a series 22pf capacitor state, a series 5nH inductor state, and a series 10nH inductor state.
Taking the 824MHz to 960MHz and 1710MHz to 2700MHz bands as examples, it can be seen that:
the switch on/off at the position of the connection point 700 or the connection of different device values mainly has great influence on 1710MHz-2700MHz, because in the embodiment, the electric connection mode of changing the structure position mainly influences the equivalent electric length of the medium-high frequency parasitic arm of the antenna, thereby causing different frequency offsets;
the switch short state substantially coincides with the return loss curve through the 22pf capacitor connected metal frame 100 and metal middle frame 200 because the series connection of 22pf capacitors is substantially equivalent to a short circuit for high frequencies; the open state of the switch is equivalent to the series connection of an infinite inductor, the medium frequency waveform is low and already deviates from 1710MHz near 1575 MHz;
series connection 10nH inductance, intermediate frequency waveform is between switch open state and series connection 5 nH.
The series connection of the 5nH inductors enables the intermediate frequency waveform to deviate towards a low range, optimizes intermediate frequency matching, gives consideration to high frequency well, and achieves the best waveform in five states.
In other examples, switches open or short, or other capacitance and inductance values, or combinations thereof may be used to achieve optimal tuning results, not further illustrated herein.
Fig. 8 illustrates a graph comparing the overall efficiency of the antenna for the five states of fig. 7. Compared with the prior art that only the switch open state is adopted, the antenna can be flexibly adjusted, the medium-high frequency impedance of the antenna is optimized, and the medium-high frequency performance of the antenna is greatly improved.
According to the mobile terminal antenna capable of regulating and controlling antenna resonance, the switch and the related electrical elements are added among the structural components, the electrical connection mode of the inherent metal structural component is changed by regulating different switch logic states and/or values of the electrical elements, the resonance position of the parasitic antenna is flexibly and effectively regulated and controlled, the performances of the mobile terminal antenna and the mobile terminal are guaranteed, and the antenna can be effectively applied to a small clearance antenna environment, so that the antenna occupies a smaller space, the whole machine is designed to be more compact, and the market competitiveness of a machine is enhanced.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A tunable antenna is applied to a mobile terminal, the mobile terminal comprises a main board, a metal frame and a metal middle frame, and the tunable antenna comprises:
the antenna body is connected with the mainboard, and an antenna clearance is arranged in the mobile terminal;
the parasitic antenna is formed by a metal frame and/or a metal middle frame of the mobile terminal;
an antenna switch for controlling the connection state and disconnection state of the parasitic antenna;
and the parasitic matching circuit is used for regulating and controlling the resonance of the parasitic antenna, and the parasitic antenna is coupled with the antenna body to regulate and control the resonance of the tunable antenna.
2. The tunable antenna of claim 1, wherein the parasitic matching circuit comprises an inductance and/or a capacitance, and wherein the resonance of the parasitic antenna is tuned by configuring different capacitance and/or inductance values, and wherein the resonance of the tunable antenna is tuned by coupling the parasitic antenna with the antenna body.
3. The tunable antenna of claim 2, wherein the parasitic matching circuit is electrically connected between the metal frame and the metal middle frame, and adjusts the electrical length of the parasitic antenna by adjusting different matching values to change the resonance of the parasitic antenna.
4. The tunable antenna of claim 1, wherein the antenna body comprises an antenna trace, an antenna ground, and a feed point, wherein the antenna ground is grounded.
5. The tunable antenna of claim 1, wherein the antenna headroom is 3mm to 10 mm.
6. A mobile terminal, characterized in that it comprises a tunable antenna according to any one of claims 1 to 5.
7. The mobile terminal of claim 6, wherein a gap is left between the metal middle frame and the metal frame.
8. The mobile terminal according to claim 6, wherein the metal frame of the mobile terminal is provided with a break.
9. The mobile terminal according to claim 8, wherein a first broken seam and a second broken seam are arranged on the metal frame, and the width of the first broken seam and the width of the second broken seam are 0.8 mm-2 mm.
10. The mobile terminal according to claim 6, wherein a connection point is provided between the metal frame and the metal middle frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610535002.XA CN106099319A (en) | 2016-07-08 | 2016-07-08 | A kind of tunable antenna and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610535002.XA CN106099319A (en) | 2016-07-08 | 2016-07-08 | A kind of tunable antenna and mobile terminal |
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| Publication Number | Publication Date |
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| CN106099319A true CN106099319A (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610535002.XA Pending CN106099319A (en) | 2016-07-08 | 2016-07-08 | A kind of tunable antenna and mobile terminal |
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| CN (1) | CN106099319A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107834171A (en) * | 2017-10-27 | 2018-03-23 | 上海安费诺永亿通讯电子有限公司 | A kind of compact double antenna unit and its mimo antenna system for becket mobile phone |
| CN111816986A (en) * | 2020-06-10 | 2020-10-23 | 昆山睿翔讯通通信技术有限公司 | Terminal LDS antenna system and mobile terminal |
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| CN104425881A (en) * | 2013-08-22 | 2015-03-18 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication apparatus with same |
| CN104882664A (en) * | 2014-02-28 | 2015-09-02 | 维沃移动通信有限公司 | Cross-coupled multi-antenna device |
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- 2016-07-08 CN CN201610535002.XA patent/CN106099319A/en active Pending
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| US20120112969A1 (en) * | 2010-11-05 | 2012-05-10 | Ruben Caballero | Antenna system with receiver diversity and tunable matching circuit |
| CN102738556A (en) * | 2011-04-14 | 2012-10-17 | 三星电子株式会社 | Antenna apparatus for portable terminal and portable terminal with same |
| CN104079313A (en) * | 2013-03-29 | 2014-10-01 | 株式会社泛泰 | Terminal including multiband antenna using conductive border |
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| CN107834171A (en) * | 2017-10-27 | 2018-03-23 | 上海安费诺永亿通讯电子有限公司 | A kind of compact double antenna unit and its mimo antenna system for becket mobile phone |
| CN111816986A (en) * | 2020-06-10 | 2020-10-23 | 昆山睿翔讯通通信技术有限公司 | Terminal LDS antenna system and mobile terminal |
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