CN111463548A - Electronic device and near field communication antenna thereof - Google Patents

Electronic device and near field communication antenna thereof Download PDF

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Publication number
CN111463548A
CN111463548A CN201910048069.4A CN201910048069A CN111463548A CN 111463548 A CN111463548 A CN 111463548A CN 201910048069 A CN201910048069 A CN 201910048069A CN 111463548 A CN111463548 A CN 111463548A
Authority
CN
China
Prior art keywords
opening
electronic device
conductive plate
conductive
feed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910048069.4A
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Chinese (zh)
Inventor
蔡建宏
廖国助
罗伟诚
连德立
吴明珊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asustek Computer Inc
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Asustek Computer Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asustek Computer Inc filed Critical Asustek Computer Inc
Priority to CN201910048069.4A priority Critical patent/CN111463548A/en
Publication of CN111463548A publication Critical patent/CN111463548A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • 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
    • 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

Abstract

The invention provides an electronic device which comprises a conductive plate, an opening, two feed-in parts and an electronic component. The opening is arranged on the side edge of the conductive plate. The opening is provided with a first edge and a second edge which are opposite to each other, and the first edge and the second edge are connected with the side edge of the conductive plate. An electronic component is located in the opening. The two feed-in parts are respectively arranged on the first side and the second side of the opening. The two feed-in parts are used for receiving feed-in signals, and the feed-in signals are transmitted to the second edge of the opening along the first edge of the opening to form a near-field magnetic field.

Description

Electronic device and near field communication antenna thereof
Technical Field
The present invention relates to antenna technology, and more particularly, to an electronic device and a near field communication antenna thereof.
Background
With the progress and development of technology, electronic devices are increasingly popular. In order to meet the demand of the public, the electronic device has not only the traditional wireless Communication protocols such as WIFI and bluetooth, but also Near Field Communication (NFC) technology is becoming a Communication technology that can be practically used in the electronic device.
However, due to the complicated functions of the electronic device, the electronic device needs to incorporate more components under the design of limited volume. When the nfc antenna is disposed in an electronic device, the space of other components in the electronic device must be compressed, or the volume of the electronic device must be increased. Therefore, for manufacturing thin and light electronic devices, the additional burden is increased by the near field communication antenna.
Disclosure of Invention
In view of the above, the present invention provides an electronic device including a conductive plate, an opening, two feeding portions and an electronic component. The opening is arranged on the side edge of the conductive plate. The opening is provided with a first edge and a second edge which are opposite to each other, and the first edge and the second edge are connected with the side edge of the conductive plate. An electronic component is located in the opening. The two feed-in parts are respectively arranged on the first side and the second side of the opening. The two feed-in parts are used for receiving feed-in signals, and the feed-in signals are transmitted to the second edge of the opening along the first edge of the opening to form a near-field magnetic field.
The present disclosure further provides a near field communication antenna including a conductive plate, an opening, and two feeding portions. The opening is arranged on the side edge of the conductive plate. The opening is provided with a first edge and a second edge which are opposite to each other, and the first edge and the second edge are connected with the side edge of the conductive plate. The two feed-in parts are respectively arranged on the first side and the second side of the opening. The two feed-in parts are used for receiving feed-in signals, and the feed-in signals are transmitted to the second edge of the opening along the first edge of the opening to form a near-field magnetic field.
In summary, according to the electronic device and the nfc antenna thereof, the function of nfc can be achieved through the opening of the conductive plate. Since the conductive plate in the electronic device includes an opening, the opening is used for disposing the electronic component. Through set up two feed-in portions on open-ended first limit and second limit, consequently can realize the near field communication function under the inner space that does not additionally occupy electronic device, and then solve traditional jumbo size antenna problem that the volume is too big. And the cost is reduced, the light and thin structure is achieved, and meanwhile, the near field communication induction efficiency is kept quite high.
Other features and embodiments of the present invention will be described in detail below with reference to the drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of an electronic device according to some embodiments of the disclosure;
fig. 2 is a partial schematic view of a conductive plate according to some embodiments of the present disclosure;
FIG. 3 is a schematic diagram of a feed signal according to some embodiments of the present disclosure;
FIG. 4 is a schematic diagram of a near-field magnetic field according to some embodiments of the present disclosure;
FIG. 5 is a schematic diagram of a control circuit according to some embodiments of the present disclosure;
FIG. 6 is a schematic view of a fastener according to some embodiments of the present disclosure;
FIG. 7 is a schematic view of a fastener according to further embodiments of the present disclosure;
fig. 8 is a schematic diagram of a second antenna according to some embodiments of the present disclosure;
FIG. 9 is a schematic diagram of near field magnetic fields according to further embodiments of the present disclosure;
FIG. 10 is a test chart of the feed signal according to some embodiments of the present disclosure;
FIG. 11 is a test chart of near field magnetic fields according to some embodiments of the present disclosure;
fig. 12 is a schematic diagram of a nfc antenna according to some embodiments of the present disclosure.
Detailed Description
In order to make the objects, features and effects of the present invention easier to understand, embodiments and drawings for describing the present invention in detail are provided below.
The present application relates to near field communication antennas. While various preferred modes of carrying out the invention have been described in the specification, it is to be understood that the invention may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth below or to specific ways to practice the features described below. In other instances, well-known details will not be discussed or illustrated in order not to obscure the present disclosure.
In this case, the word "coupled" and its derivatives may be used. In some embodiments, "coupled" may mean that two or more elements are in direct physical or electrical contact with each other, or that two or more elements are in direct electrical contact with each other. The term "coupled" may still be used to indicate that two or more elements co-operate or interact with each other.
Referring to fig. 1, in some embodiments, an electronic device 10, such as but not limited to a mobile phone (cellular phone), a tablet pc, a notebook computer (notebook), or any device with a near field communication function, is described as an example of a mobile phone.
Referring to fig. 1 and fig. 2, in some embodiments, the electronic device 10 includes a conductive plate 100, an opening 500, two feeding portions 600, an electronic component 700, a panel 200, an insulating backplate 400, and a printed circuit board 300. The electronic component 700 is located in the opening 500, the opening 500 is disposed at one side 110 of the conductive plate 100, and the opening 500 has a first side 510 and a second side 520 opposite to each other. The first edge 510 and the second edge 520 are connected to the side edge 110 of the conductive plate. The two feeding elements 600 are respectively disposed on the first side 510 and the second side 520. The conductive plate 100 has a normal D, the face plate 200, the printed circuit board 300 and the insulating backplate 400 are respectively located on the normal D of the conductive plate 100, and the conductive plate 100 is sandwiched between the face plate 200 and the insulating backplate 400. In some embodiments, one of the feeding portions 600 is located at the boundary between the first edge 510 of the opening 500 and the outer edge of the conductive plate 100 and is adjacent to the first edge 510 but does not join the outer edge of the conductive plate 100 and the conductive plate 100 of the first edge 510. And the other of the feeding portions 600 is located at the boundary between the second edge 520 of the opening 500 and the outer edge of the conductive plate 100 and is adjacent to the second edge 520 but not connected to the outer edge of the conductive plate 100 and the conductive plate 100 of the second edge 520. In some embodiments, the printed circuit 300 board is sandwiched between the conductive board 100 and the insulating backplane 400. According to some embodiments, the conductive plate 100 and the two feeding elements 600 may be made of conductive materials, such as, but not limited to: copper, silver, iron, aluminum or alloys thereof.
In some embodiments, the electronic device 10 uses the panel 200 and the insulating backplate 400 as the top cover and the bottom cover of the electronic device 10, respectively, to serve as the supporting structure for the front and the back of the electronic device 10. The conductive plate 100 is used as a supporting structure between the front panel 200 and the insulating backplate 400, that is, the conductive plate 100 is an internal skeleton of the electronic device 10. According to some embodiments, the aforementioned printed circuit board 300 is connected to the conductive plate 100 to be fixed in the electronic device 10.
Referring to fig. 2, fig. 3 and fig. 4, in some embodiments, the two feeding portions 600 are used for receiving a feeding signal Sin. Wherein the feed-in signal SinThe body of the conductive plate 100 is used as a signal transmission medium to be transmitted to the second side 520 of the opening 500 along the first side 510 of the opening 500 and form a near-field magnetic field Sout. In particular, when feeding signal SinWhen passing through the conductive plate 100, the feed signal S is influenced by skin effectinAre unevenly distributed in the conductive plate 100. Thus feeding signal SinThe feeding signal S mainly flows along the edge of the opening 500 and flows along the edge of the opening 500inEquivalently, a non-closed loop is formed in the conductive plate 100. When feeding signal SinA near-field magnetic field S is formed when the magnetic field flows through the unclosed annular loopoutThe unclosed loop at the edge of the opening 500 is therefore considered to be a first antenna.
Referring to fig. 2, in some embodiments, the electronic device 10 further includes a conductive frame 800 and an insulating plate 900. The conductive frame 800 is connected to the conductive plate 100, and the insulating plate 900 is connected to the conductive frame 800 and the conductive plate 100. It should be noted that the insulating plate 900 is connected to the side 110 provided with the opening 500. In some embodiments, the conductive plate 100 may extend into the conductive bezel 800 visible to the exterior of the electronic device 10, and the conductive plate 100 is located inside the electronic device 10 (not visible to the exterior) after the electronic device 10 is assembled. In some embodiments, the conductive bezel 800 is used to provide a 3G, 4G, Wi-Fi, Global Navigation Satellite System (GNSS), etc. antenna as the multi-frequency antenna 810 (i.e., multi-segment antenna) of the electronic device 10. And the insulating plate 900 is used as a radiation area of the aforementioned multi-frequency antenna 810.
Accordingly, the conductive frame 800 includes at least one multi-frequency antenna 810, at least one insulation point 820, and at least one feeding point 830. The insulating point 820 can be used to isolate the electrical connection between different multi-frequency antennas 810, and the insulating point 820 can also be used to isolate the electrical connection between the multi-frequency antenna 810 and other conductive portions of the conductive frame 800, so that the multi-frequency antennas 810 can operate independently. The feeding point 830 is coupled to the conductive plate 100, and the multi-band antenna 810 uses the feeding point 830 as a grounding area. According to some embodiments, the insulating plate 900 is composed of, for example, but not limited to, a non-metallic material or a non-conductive material.
Referring to fig. 5, in some embodiments, the electronic device 10 further includes a control circuit 310. The control circuit 310 is coupled to the two feeding elements 600, and the control circuit 310 is used for outputting the feeding signal SinTo the feeding portion 600. In some embodiments, the control circuit 310 includes a near field communication chip 320, and the near field communication chip 320 adjusts the feeding signal SinTo control the near field magnetic field Sout. According to some embodiments, the control circuit 310 is disposed on the printed circuit board 300 inside the electronic device 10.
Referring to fig. 5 and fig. 6, in some embodiments, each feeding portion 600 is a fixing groove 610. The control circuit 310 is connected to the two fixing slots 610 through the two fixing members 620, that is, one fixing member 620 corresponds to one fixing slot 610. Wherein the feed-in signal SinAfter being output from the control circuit 310, the signal S is fed ininIs transmitted to the fixing groove 610 through the fixing member 620 and is transmitted to the conductive plate 100 through the fixing groove 610. According to some embodiments, the fixing member 620 is engaged with the fixing groove 610 in a fitting manner. In some embodiments, the fixingThe member 620 includes a retaining ring 630 and a retaining lock 640. The fixing ring 630 is disposed on the printed circuit board 300. The fixed lock 640 has threads and the fixed groove 610 has threads that mate with the fixed lock 640. The fixing lock 640 fixes the fixing ring 630 to the fixing groove 610 in a locking manner. In some embodiments, the fixing groove 610 is a screw post.
Referring to fig. 5 and fig. 7, in some embodiments, each of the feeding portions 600 is a conductive contact 650, and the control circuit 310 is connected to the two conductive contacts 650 through two elastic pieces 660, that is, one elastic piece 660 corresponds to one conductive contact 650. Wherein the feed-in signal SinAfter being output from the control circuit 310, the signal S is fed ininIs transmitted to the conductive contact 650 via the spring 660 and then transmitted to the conductive plate 100 via the conductive contact 650. The shape of the spring plate 660 is, for example, but not limited to, a flat type, a micro-convex type, or a micro-concave type. In some embodiments, the spring 660 is disposed on the pcb 300. According to some embodiments, the surface conductivity of the conductive plate 100 may be deteriorated since the surface of the conductive plate 100 may be anodized or oxidation-resistant to form a thicker and denser oxide layer to increase the insulation, oxidation resistance and corrosion resistance of the surface. The conductive plate 100 may be manufactured with the conductive contact 650 by a laser engraving technique to improve the conductivity of the conductive contact 650.
Referring to fig. 8, in some embodiments, the electronic device 10 further includes a second antenna 340, and the second antenna 340 has a coupling point 350 and a feeding point 360. The coupling point 350 of the second antenna 340 is coupled to one of the two feeding elements 600, and the control circuit 310 is coupled to the feeding point 360 of the second antenna 340 and the other of the two feeding elements 600. The second antenna 340 is responsive to the feed signal SinAn auxiliary near-field magnetic field (not shown) is generated to match the near-field magnetic field SoutAnd thus the second antenna 340 serves to intensify the near-field magnetic field SoutThe strength of the electronic device 10 is enhanced. It is to be noted that the electronic device 10 can be configured with the second antenna 340 according to the position of the opening 500, and the second antenna 340 and the first antenna can be connected in series by configuring the opening 500 and the second antenna 340 at different positions in the electronic device 10Operated in tandem to intensify the strength S of the near-field magnetic fieldout。
In some embodiments, the second antenna 340 is an antenna with a near field communication function, and the second antenna 340 may be, for example, but not limited to, a planar spiral coil in a Flexible Printed Circuit (FPC) type, a laser direct structuring (L DS) type, or a Printed Circuit Board (PCB) type.
Referring to fig. 1 and 9, in some embodiments, the thickness of the electronic component 700 in the opening 500 on the normal D is close to the thickness of the electronic device 10 on the normal D, so that the electronic device 10 does not overlap other conductive elements on the normal D of the opening 500, so that the feeding signal S is fed ininGenerated near-field magnetic field SoutNot shielded by other conductive elements. And the electronic assembly 700 has only a small area of conductive structure, so that the electronic assembly 700 is not susceptible to near-field magnetic field SoutSince eddy current (eddy current) is generated, the electronic device 10 does not need to enhance the near field magnetic field S by adding a ferrite sheet (ferrite sheet) as in a mobile device with a nfc antennaoutThe function of near field communication can be achieved. In some embodiments, the electronic component 700 is a camera module, a speaker module, or an earpiece module, but not limited thereto.
In some embodiments, the near-field magnetic field S isoutHas a plurality of magnetic lines L, in which the near field magnetic field SoutThe magnetic lines of force L pass through the panel 200 and the insulating backplate 400. specifically, since the magnetic lines of force L are not shielded by a large area of conductive elements on the normal D of the opening 500, the front and back sides of the electronic device 10 can provide effective near field communication to improve the sensing hand feeling and improve the matching flexibility of the electronic device 10 in the fingerprint identification design.
Referring to fig. 10, in some embodiments, the feeding signal S isinA feed signal S input from one of the two feed parts 600 and flowing along the edge of the opening 500inAnd then output from the other of the two feeding portions 600. Feed-in signal SinThe signal density distribution in the conductive plate 100 is shown in fig. 10, wherein the arrow symbols represent the feeding signalNumber SinThe denser the arrow symbol is, the more signal S is fed ininThe stronger the signal of (S), whereas the sparser the arrow symbols the more signal S is fed ininThe weaker the signal of (c).
Referring to FIG. 11, in some embodiments, the near field magnetic field SoutThe conductive plate 100 has near-field magnetic fields S on both sides thereof through the opening 500outOf the signal of (1). Near field magnetic field SoutThe signal density distribution of (A) is as shown in FIG. 11, in which the arrow symbol represents the near-field magnetic field SoutThe denser the arrow sign is, the near-field magnetic field SoutThe stronger the signal of (A), whereas the more sparse the arrow sign is, the more the near-field magnetic field SoutThe weaker the signal of (c).
Referring to fig. 12, in some embodiments, a nfc antenna 20 includes a conductive plate 100, an opening 500, and two feeding elements 600. The opening 500 is disposed at the side 110 of the conductive plate 100. The opening 500 has a first side 510 and a second side 520 opposite to each other, wherein the first side 510 and the second side 520 are connected to the side 110 of the conductive plate 100. The two feeding elements 600 are respectively disposed on the first side 510 and the second side 520. The two feeding parts 600 are used for receiving the feeding signal SinIn which a signal S is fedinPasses along the first side 510 of the opening 500 to the second side 520 of the opening 500 and forms a near-field magnetic field Sout。
As described above, according to the electronic device 10 and the nfc antenna 20 of the present disclosure, the function of nfc can be achieved through the opening 500 of the conductive plate 100. Since the conductive plate 100 in the electronic device 10 includes the opening 500, the opening 500 is originally used for disposing the electronic component 700. By disposing the two feeding portions 600 on the first side 510 and the second side 520 of the opening 500, and only overlapping the electronic component 700 with the conductive structure having a small area on the normal D of the opening 500, the near field communication function can be realized without occupying an additional internal space of the electronic device 10, thereby solving the problem of the conventional large-sized antenna that the volume is too large. And the cost is reduced, the light and thin structure is achieved, and meanwhile, the near field communication induction efficiency is kept quite high. In some embodiments, the electronic device 10 can be connected to another antenna with a near field communication function to enhance the near field magnetic field SoutThe strength of (2).
The above-described embodiments and/or implementations are only for illustrating the preferred embodiments and/or implementations of the present technology, and are not intended to limit the implementations of the present technology in any way, and those skilled in the art may make modifications or changes to other equivalent embodiments without departing from the scope of the technical means disclosed in the present disclosure, but should be construed as the technology or implementations substantially the same as the present technology.

Claims (10)

1. An electronic device, comprising:
a conductive plate;
an opening provided at a side of the conductive plate, the opening having a first side and a second side opposite to each other, wherein the first side and the second side are connected to the side of the conductive plate;
two feed-in parts respectively arranged on the first side and the second side of the opening to receive feed-in signals, wherein the feed-in signals are transmitted to the second side of the opening along the first side of the opening and form a near-field magnetic field; and
and the electronic assembly is positioned in the opening.
2. The electronic device of claim 1, further comprising:
a conductive frame connected to the conductive plate; and
and an insulating plate connected to the conductive frame and the conductive plate, wherein the insulating plate is connected to the side where the opening is formed.
3. The electronic device of claim 1, further comprising a second antenna coupled to one of the two feeding elements.
4. The electronic device of claim 1, further comprising a control circuit coupled to the two feeding portions and outputting the feeding signal.
5. The electronic device of claim 4, wherein each of the feeding elements is a fixing slot, the control circuit is connected to the two fixing slots through two fixing members, and the feeding signal is transmitted to the fixing slots through the fixing members.
6. The electronic device of claim 4, wherein each of the feeding portions is a conductive contact, the control circuit is connected to the two conductive contacts through two resilient pieces, and the feeding signal is transmitted to the conductive contacts through the resilient pieces.
7. The electronic device of claim 1, further comprising a faceplate and an insulating backplate, wherein the faceplate and the insulating backplate are respectively located on a normal line of the conductive plate, and the conductive plate is sandwiched between the faceplate and the insulating backplate, and wherein magnetic lines of the near-field magnetic field pass through the faceplate and the insulating backplate.
8. The electronic device of claim 1, wherein the two feeding portions are adjacent to the side edges of the conductive plate and are respectively adjacent to the first edge and the second edge of the opening.
9. The electronic device of claim 1, wherein the electronic component is a camera module, an earpiece module, or a speaker module.
10. A near field communication antenna, comprising:
a conductive plate;
an opening provided at a side of the conductive plate, the opening having a first side and a second side opposite to each other, wherein the first side and the second side are connected to the side of the conductive plate; and
two feed-in parts respectively arranged on the first side and the second side of the opening to receive feed-in signals, wherein the feed-in signals are transmitted to the second side of the opening along the first side of the opening and form a near-field magnetic field.
CN201910048069.4A 2019-01-18 2019-01-18 Electronic device and near field communication antenna thereof Pending CN111463548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910048069.4A CN111463548A (en) 2019-01-18 2019-01-18 Electronic device and near field communication antenna thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910048069.4A CN111463548A (en) 2019-01-18 2019-01-18 Electronic device and near field communication antenna thereof

Publications (1)

Publication Number Publication Date
CN111463548A true CN111463548A (en) 2020-07-28

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Citations (6)

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Publication number Priority date Publication date Assignee Title
US20150009077A1 (en) * 2013-07-03 2015-01-08 Samsung Electronics Co., Ltd. Cover of a mobile device and mobile device including the same
CN204257822U (en) * 2012-12-20 2015-04-08 株式会社村田制作所 Information terminal device
CN206389417U (en) * 2016-12-30 2017-08-08 惠州比亚迪实业有限公司 A kind of metal shell antenna assembly and mobile terminal
CN207098059U (en) * 2017-05-04 2018-03-13 上海德门电子科技有限公司 The NFC structures without antenna based on metal rear shell
WO2018097557A2 (en) * 2016-11-28 2018-05-31 Samsung Electronics Co., Ltd. Electronic device including antenna
CN208045684U (en) * 2018-04-24 2018-11-02 广州三星通信技术研究有限公司 Antenna structure for electric terminal and the electric terminal with the antenna structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204257822U (en) * 2012-12-20 2015-04-08 株式会社村田制作所 Information terminal device
US20150009077A1 (en) * 2013-07-03 2015-01-08 Samsung Electronics Co., Ltd. Cover of a mobile device and mobile device including the same
WO2018097557A2 (en) * 2016-11-28 2018-05-31 Samsung Electronics Co., Ltd. Electronic device including antenna
CN206389417U (en) * 2016-12-30 2017-08-08 惠州比亚迪实业有限公司 A kind of metal shell antenna assembly and mobile terminal
CN207098059U (en) * 2017-05-04 2018-03-13 上海德门电子科技有限公司 The NFC structures without antenna based on metal rear shell
CN208045684U (en) * 2018-04-24 2018-11-02 广州三星通信技术研究有限公司 Antenna structure for electric terminal and the electric terminal with the antenna structure

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Application publication date: 20200728