CN105811104B - Electronic device - Google Patents

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CN105811104B
CN105811104B CN201410852722.XA CN201410852722A CN105811104B CN 105811104 B CN105811104 B CN 105811104B CN 201410852722 A CN201410852722 A CN 201410852722A CN 105811104 B CN105811104 B CN 105811104B
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metal
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electronic device
impedance
unit
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CN105811104A (en
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雷利斌
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Lenovo Beijing Ltd
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Lenovo Beijing Ltd
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Abstract

The invention discloses an electronic device, which comprises a metal frame body, a grounding unit and an antenna unit, wherein the metal frame body is provided with a plurality of first connecting holes; the metal frame body includes a first metal portion and a second metal portion; the first metal portion is connected to the second metal portion; the first metal part is in contact with the grounding unit; the second metal part is separated from the grounding unit; the antenna unit includes a radiation section; the second metal portion constitutes the radiation portion.

Description

Electronic device
Technical Field
The present invention relates to antenna technologies in the field of communications, and in particular, to an electronic device.
Background
With the development of electronic technology, the dependence of users on electronic devices is enhanced, and the demands of light weight and thinness of electronic devices are more and more obvious when the existing electronic devices are convenient to carry and hold by users. At present, a radiation portion of an antenna on an electronic device is constituted by a metal housing of the electronic device and a flexible circuit board FPC or the like, which is connected to a ground point so that the metal housing can radiate a signal outward.
However, the antenna radiation structure introduces the FPC to increase the difficulty of making the electronic device light and thin, and the FPC is used to increase the hardware cost and the manufacturing cost.
Disclosure of Invention
In view of this, embodiments of the present invention are directed to providing an electronic device, which solves the problem of complex structure of the existing electronic device.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: the invention discloses electronic equipment, which comprises a metal frame body, a grounding unit and an antenna unit, wherein the metal frame body is provided with a plurality of first connecting holes;
the metal frame body includes a first metal portion and a second metal portion; the first metal portion is connected to the second metal portion; the first metal part is in contact with the grounding unit; the second metal part is separated from the grounding unit; the antenna unit includes a radiation section; the second metal portion constitutes the radiation portion.
Preferably, the first and second electrodes are formed of a metal,
the second metal portion includes three separate sub-portions, a first sub-portion, a second sub-portion, and a third sub-portion; the second subsection is an intermediate section between the first subsection and the third subsection; the first sub-portion is separated from the second sub-portion by a first slit disposed on the second metal portion; the third sub-portion is separated from the second sub-portion by a second slit disposed on the second metal portion.
Preferably, the antenna element further comprises a feeding point connected with the second subsection; the distance between the feeding point and the first slit is a first distance; the distance between the feeding point and the second slit is a second distance; the first distance is not equal to the second distance.
Preferably, the antenna unit further comprises a feed point and a matching network; the radiating part is connected with the matching network through the feed point; the matching network comprises an impedance-tunable element; the impedance adjustable element is used for realizing resonant impedance matching with the antenna unit at different frequency bands by changing the impedance of the matching network.
Preferably, the impedance-tunable element is a variable capacitor.
Preferably, the antenna unit further comprises an adjustment element; the adjusting element is used for controlling the impedance of the impedance adjustable element.
Preferably, the adjustment element is an active element.
Preferably, the active element is configured to control an impedance of the impedance-tunable element by an output voltage.
Preferably, the antenna element further comprises a feed point; the pin of the feeding point is in contact with the second metal portion.
Preferably, an antenna clearance area of the antenna unit is further provided at a position of the second metal portion in the electronic device.
According to the electronic equipment provided by the embodiment of the invention, the first metal part of the metal frame body which is taken as the antenna unit component is directly contacted with the grounding unit, so that structures such as an FPC (flexible printed circuit) are not used as an intermediate connection structure between the metal frame body and the grounding unit, the structure of the electronic equipment is simplified, the hardware cost of the electronic equipment caused by parts such as the FPC is reduced, when the electronic equipment is manufactured, the FPC, the metal frame body and the grounding unit are not required to be respectively connected, and the production efficiency of the electronic equipment is improved. More importantly, the connection stability of the FPC, the metal frame body and the grounding element is far less than the stability of the metal frame body directly in contact connection with the grounding element, so that the problems of communication interruption or communication signal existence sometimes caused when the FPC is separated from at least one of the metal frame body and the grounding element can be avoided, and the communication quality of the electronic equipment is improved.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the invention;
fig. 2 is a second schematic structural diagram of an electronic device according to an embodiment of the invention;
FIG. 3 is a schematic diagram illustrating a resonance effect of an electronic device according to an embodiment of the invention;
fig. 4 is a partial equivalent schematic diagram of an antenna unit according to an embodiment of the present invention;
fig. 5 is a third schematic structural diagram of an electronic device according to an embodiment of the invention.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides an electronic apparatus including a metal frame body 110, a ground unit 120, and an antenna unit;
the metallic frame body 110 includes a first metallic portion 111 and a second metallic portion 112; the first metal portion 111 is connected to the second metal portion 112;
the first metal part 111 is in contact with the ground unit 120; the second metal part 112 is separated from the ground unit 110;
the antenna unit includes a radiation section;
the second metal portion 112 constitutes the radiating portion.
The frame body may be all or part of a housing portion of the electronic device housing, front bezel, side bezel, or rear cover, etc. located on the surface of the electronic device.
The metal body frame body can be a simple substance metal frame body or an alloy metal frame body. The grounding unit 120 may include a grounding conductor layer; the conductor layer forms a grounding point connection inside the electronic equipment; the grounding unit may be only one grounding point.
The metal frame body in this embodiment includes a first metal portion and a second metal portion; the first metal part and the second metal part may be partially or entirely connected, and the first metal part and the second metal part may form an electrically conductive path regardless of partial connection or full connection. In this embodiment, the first metal part and the second metal part are preferably all connected to form a connected structure, which can simplify the manufacturing of the metal frame body.
In fig. 1, the first metal portion 111 and the second metal portion 112 are separated by a dotted line, the dotted line is the first metal portion 111 on the left and the dotted line is the second metal portion 112 on the right.
The first metal part 111 is in contact with the ground unit 120, that is, the first metal part 111 is electrically connected to the ground unit 120 in a contact manner.
In fig. 1, the first metal part 111 is entirely connected to the ground unit, and in a specific implementation, the first metal part 111 may be electrically connected to only contact with the ground unit 120.
The antenna unit is a structure for receiving and/or transmitting wireless signals.
The first metal part 110 is in contact with the grounding unit 120, that is, the first metal part is directly connected with the grounding unit, so that it is not necessary to use a connection line such as an FPC as an intermediate component between the grounding unit and the metal frame as in the prior art to connect, thereby simplifying the structure of the electronic device, saving the hardware cost of the FPC, and meanwhile, when manufacturing the electronic device, it is not necessary to connect the FPC with the metal frame and the grounding unit respectively, which can improve the production efficiency of the electronic device; meanwhile, the problems that the working performance of the antenna unit is unstable, the communication signal is unstable and the user using satisfaction degree is poor due to unstable contact between the FPC and the metal frame body can be avoided.
The second metal part is separated from the grounding unit, constitutes a radiation part of the antenna unit, and is used for radiating wireless signals to a space outside the electronic equipment or receiving the electronic equipment from the space outside the electronic equipment.
In summary, the present embodiment provides an electronic device, which has the advantages of simple structure, low manufacturing cost and hardware cost, and the like, compared with the existing electronic device that uses an FPC to connect the metal frame body and the grounding unit.
In addition, fig. 1 also shows other functional units, which may specifically be entities such as a power supply unit or an interface unit that implement other functions.
Example two:
as shown in fig. 1, the present embodiment provides an electronic apparatus including a metal frame body 110, a ground unit 120, and an antenna unit;
the metallic frame body 110 includes a first metallic portion 111 and a second metallic portion 112; the first metal portion 111 is connected to the second metal portion 112;
the first metal part 111 is in contact with the ground unit 120; the second metal part 112 is separated from the ground unit 110;
the antenna unit includes a radiation section;
the second metal portion 112 constitutes the radiating portion.
As shown in fig. 2, the second metal portion includes three separate sub-portions, a first sub-portion 1121, a second sub-portion 1122, and a third sub-portion 1123;
the second sub-portion 1122 is an intermediate portion between the first sub-portion 1121 and the third sub-portion 1123;
the first sub-portion 1121 is separated from the second sub-portion 1122 by a first slit 1124 provided on the second metal portion 112;
the third sub-portion 1123 is separated from the second sub-portion 1122 by a second slit 1125 provided in the second metal portion 112.
The first slits 1124 and the second slits 1125 provided in the second metal portion divide the second metal portion into three portions, forming a plurality of radiation portions that can receive wireless signals. The two radiation parts can receive and/or transmit wireless signals of the same frequency band, and can also receive and/or transmit wireless signals of different frequency bands. When two radiation parts receive and/or transmit wireless signals of the same frequency band, one radiation part is used as a main radiation part, and the other radiation part is used as a diversity radiation part. When two of the radiating portions receive wireless signals of different frequency bands, it is apparent that the bandwidth in which the electronic device is operable is increased, thereby enabling the electronic device to operate at multiple frequency bands.
Fig. 3 is a schematic diagram illustrating resonance effects of the electronic device according to the present embodiment at various frequency bands; in fig. 3, the ordinate indicates the return loss; frequency as indicated on the abscissa. The lower the return loss, the higher the antenna efficiency in this frequency band, and the lower the return loss, the resonant frequency band of the antenna is formed. The location indicated by the box in fig. 3 is the resonance band of the antenna unit as a whole; i.e. the resonance frequency band when the second metal part as a whole is carrying out signal radiation. Also shown in fig. 3 are the common resonant frequency band in which the first and second sub-portions operate together, the resonant frequency band of the second sub-portion, and the common resonant frequency band in which the second and third sub-portions operate together; it is obvious that the antenna unit described in this embodiment can operate in a plurality of different operating frequency bands, thereby having the advantage of large operating bandwidth.
In a specific implementation, the second metal part may also be provided with only one slit or may also be provided with three or even more than three slits.
Example three:
as shown in fig. 1, the present embodiment provides an electronic apparatus including a metal frame body 110, a ground unit 120, and an antenna unit;
the metallic frame body 110 includes a first metallic portion 111 and a second metallic portion 112; the first metal portion 111 is connected to the second metal portion 112;
the first metal part 111 is in contact with the ground unit 120; the second metal part 112 is separated from the ground unit 110;
the antenna unit includes a radiation section;
the second metal portion 112 constitutes the radiating portion.
As shown in fig. 2, the second metal portion includes three separate sub-portions, a first sub-portion 1121, a second sub-portion 1122, and a third sub-portion 1123;
the second sub-portion 1122 is an intermediate portion between the first sub-portion 1121 and the third sub-portion 1123;
the first sub-portion 1121 is separated from the second sub-portion 1122 by a first slit 1124 provided on the second metal portion 112;
the third sub-portion 1123 is separated from the second sub-portion 1122 by a second slit 1125 provided in the second metal portion 112.
The antenna element further comprises a feeding point 1126 connected to the second subsection;
the distance between the feeding point 1126 and the first slit 1124 is a first distance;
the distance between the feeding point 1126 and the second slit 1125 is a second distance;
the first distance is not equal to the second distance.
The different position of the feeding point 1126 will result in different resonance frequency bands of the first radiation part formed based on the first slit and the second radiation part formed based on the second slit; in order to increase the bandwidth of the electronic device in this embodiment, the first distance and the second distance corresponding to the arrangement position of the feeding point are different.
In a specific implementation, to facilitate manufacturing of the electronic device, the first slit and the second slit are generally symmetrically disposed about a central axis of a side of the electronic device where the slit is located.
In a specific implementation, the resonance frequency band and the bandwidth of the electronic device can be controlled by controlling the contact position of the first metal part and the grounding unit, the connection position of the feeding point and the second metal part, and the separation length of the second metal part from other structures inside the electronic device.
Example four:
as shown in fig. 1, the present embodiment provides an electronic apparatus including a metal frame body 110, a ground unit 120, and an antenna unit;
the metallic frame body 110 includes a first metallic portion 111 and a second metallic portion 112; the first metal portion 111 is connected to the second metal portion 112;
the first metal part 111 is in contact with the ground unit 120; the second metal part 112 is separated from the ground unit 110;
the antenna unit includes a radiation section;
the second metal portion 112 constitutes the radiating portion.
As shown in fig. 4, the antenna unit further includes a feeding point and a matching network;
the radiating part is connected with the matching network through the feed point;
the matching network comprises an impedance tunable element BST;
the impedance tunable element BST is configured to change an impedance of the matching network to implement resonant impedance matching with the antenna unit at different frequency bands.
The matching network is used for enabling the antenna unit to realize impedance matching so as to improve the conversion efficiency of the electric energy of the antenna to the electromagnetic energy.
In fig. 4, the matching network further includes a capacitor C1, an inductor L1, an inductor L2, and a capacitor C2. The impedance tunable element BST may be more than one, specifically 2 or 3.
In this embodiment, the matching network further includes an impedance-tunable element, and it is obvious that the impedance of the matching network is tunable, so that the resonant impedance matching of the antenna unit under different frequency bands can be realized by controlling and changing the impedance of the impedance-tunable element. Therefore, the electronic equipment can work in a plurality of frequency bands, and the working bandwidth of the electronic equipment is improved.
Practice shows that the electronic device can operate in multiple frequency bands for wireless communication, such as frequency band 8, frequency band 5, frequency band 20, and frequency band 17, through the arrangement of the impedance tunable element. The frequency bands 8, 5, 20 and 17 include specific operating frequency bands, which can be referred to in the prior art and will not be explained in further detail here.
Example five:
as shown in fig. 1, the present embodiment provides an electronic apparatus including a metal frame body 110, a ground unit 120, and an antenna unit;
the metallic frame body 110 includes a first metallic portion 111 and a second metallic portion 112; the first metal portion 111 is connected to the second metal portion 112;
the first metal part 111 is in contact with the ground unit 120; the second metal part 112 is separated from the ground unit 110;
the antenna unit includes a radiation section;
the second metal portion 112 constitutes the radiating portion.
The antenna unit further comprises a feed point and a matching network;
the radiating part is connected with the matching network through the feed point;
the matching network comprises an impedance-tunable element;
the impedance adjustable element is used for realizing resonant impedance matching with the antenna unit at different frequency bands by changing the impedance of the matching network.
The impedance adjustable element comprises a resistance adjustable element and an inductance adjustable element, and a variable capacitor with adjustable capacitance is used in the embodiment. Compared with a resistance adjustable element and an inductance adjustable element, the variable capacitor has the advantages of small volume, good adjustable performance and low cost.
Example six:
as shown in fig. 1, the present embodiment provides an electronic apparatus including a metal frame body 110, a ground unit 120, and an antenna unit;
the metallic frame body 110 includes a first metallic portion 111 and a second metallic portion 112; the first metal portion 111 is connected to the second metal portion 112;
the first metal part 111 is in contact with the ground unit 120; the second metal part 112 is separated from the ground unit 110;
the antenna unit includes a radiation section;
the second metal portion 112 constitutes the radiating portion.
The antenna unit further comprises an adjustment element;
the adjusting element is used for controlling the impedance of the impedance adjustable element.
The adjusting element is a component for controlling the impedance of the impedance-adjustable element.
The adjusting element is an active element.
The active element is an element with electric energy inside, and is specifically of a common MOS tube, triode and other structures.
The impedance of the impedance-adjustable element is controlled by adopting the active element, so that the method has the advantage of simple and convenient realization.
Further, the active element may control the impedance of the impedance-tunable element through the output current, or may control the impedance of the impedance-tunable element through the output voltage, and in this embodiment, it is preferable that the impedance of the impedance-tunable element is controlled through the output voltage, and such a tuning element generally has an advantage of stable performance.
Example seven:
as shown in fig. 1, the present embodiment provides an electronic apparatus including a metal frame body 110, a ground unit 120, and an antenna unit;
the metallic frame body 110 includes a first metallic portion 111 and a second metallic portion 112; the first metal portion 111 is connected to the second metal portion 112;
the first metal part 111 is in contact with the ground unit 120; the second metal part 112 is separated from the ground unit 110;
the antenna unit includes a radiation section;
the second metal portion 112 constitutes the radiating portion.
The antenna element further comprises a feed point; the pin of the feeding point is in contact with the second metal portion.
The feeding point is a position for receiving an electrical signal, a pin of the feeding point is used for being connected with a feeding network, in this embodiment, the pin of the feeding point is directly contacted with the second metal part, and when the electrical signal is fed, the feeding network is directly connected with the second metal part through the pin. In a specific implementation process, the pin is preferably an elastic pin with a certain deformation function.
Example eight:
as shown in fig. 1, the present embodiment provides an electronic apparatus including a metal frame body 110, a ground unit 120, and an antenna unit;
the metallic frame body 110 includes a first metallic portion 111 and a second metallic portion 112; the first metal portion 111 is connected to the second metal portion 112;
the first metal part 111 is in contact with the ground unit 120; the second metal part 112 is separated from the ground unit 110;
the antenna unit includes a radiation section;
the second metal portion 112 constitutes the radiating portion.
As shown in fig. 1 or fig. 5, an antenna clearance area 130 of the antenna unit is further provided at the position of the second metal portion in the electronic device. The antenna clearance area 130, indicated by a dashed box in fig. 5, is the view seen after the metal frame body has been cut.
In fig. 1 the first subsection and the third subsection are identically shaped and the corresponding antenna clearance area is identically shaped so that the resonant lengths of the first subsection and the third subsection are identical. While in fig. 5 the shapes of the first and third sub-sections are not the same, the shapes of the corresponding antenna clearance areas are different, so that the resonant lengths of the first and third sub-sections are different. Therefore, when the electronic equipment is manufactured, the resonance lengths of different radiation parts can be changed by changing the shapes of the antenna clearance areas corresponding to the word parts.
The antenna clearance area 130 is an area where the second metal portion is isolated from other structures in the electronic device; namely, the antenna clearance area is an area which indicates that no other components are placed below the inner surface of the second metal part. In a specific implementation, the second metal portion of the metal frame body is a portion corresponding to the antenna clearance area, and the remaining portion is the first metal portion.
In a specific implementation, a microphone Speak BOX of the electronic device may be further disposed at the position of the clearance area of the antenna.
The relative length of the second metal unit and the antenna clearance area determines the resonance length of the radiation unit of the antenna unit, and parameters such as side length, area and shape of the antenna clearance area are determined according to the frequency band required to work by the electronic equipment when the electronic equipment is manufactured. In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
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, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (9)

1. An electronic apparatus includes a metal frame body, a ground unit, and an antenna unit;
the metal frame body includes a first metal portion and a second metal portion; the first metal portion is connected to the second metal portion to form an electrically conductive path;
the grounding unit is a grounding point; the first metal part is in contact with the grounding unit; the second metal part is separated from the grounding unit;
the antenna unit includes a radiation section;
the second metal portion constitutes the radiating portion;
the second metal portion includes three separate sub-portions, a first sub-portion, a second sub-portion, and a third sub-portion;
the second subsection is an intermediate section between the first subsection and the third subsection;
the first sub-portion is separated from the second sub-portion by a first slit disposed on the second metal portion;
the third sub-portion is separated from the second sub-portion by a second slit disposed on the second metal portion;
the first sub-portion, the second sub-portion, and the third sub-portion are all connected with the first metal portion.
2. The electronic device of claim 1,
the antenna element further comprises a feeding point connected to the second subsection;
the distance between the feeding point and the first slit is a first distance;
the distance between the feeding point and the second slit is a second distance;
the first distance is not equal to the second distance.
3. The electronic device of claim 1,
the antenna unit further comprises a feed point and a matching network;
the radiating part is connected with the matching network through the feed point;
the matching network comprises an impedance-tunable element;
the impedance adjustable element is used for realizing resonant impedance matching with the antenna unit at different frequency bands by changing the impedance of the matching network.
4. The electronic device of claim 3,
the impedance adjustable element is a variable capacitor.
5. The electronic device of claim 3,
the antenna unit further comprises an adjustment element;
the adjusting element is used for controlling the impedance of the impedance adjustable element.
6. The electronic device of claim 5,
the adjusting element is an active element.
7. The electronic device of claim 6,
the active element is used for controlling the impedance of the impedance adjustable element through the output voltage.
8. The electronic device of claim 1,
the antenna element further comprises a feed point; the pin of the feeding point is in contact with the second metal portion.
9. The electronic device of claim 1,
and an antenna clearance area of the antenna unit is also arranged at the position of the second metal part in the electronic equipment.
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CN103633426A (en) * 2013-12-06 2014-03-12 华为终端有限公司 Antenna structure and mobile terminal equipment
CN104051842A (en) * 2014-03-31 2014-09-17 小米科技有限责任公司 Loop antenna system with gaps for radiation
CN103943960A (en) * 2014-05-13 2014-07-23 北京邮电大学 Novel multi-notch ultra-wideband antenna with stop-band units simultaneously loaded to feeder and patch
CN203895602U (en) * 2014-06-05 2014-10-22 上海安费诺永亿通讯电子有限公司 Novel loop antenna device

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