CN106654575B - Lid near field antenna device and communication equipment behind metal - Google Patents
Lid near field antenna device and communication equipment behind metal Download PDFInfo
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- CN106654575B CN106654575B CN201610976724.9A CN201610976724A CN106654575B CN 106654575 B CN106654575 B CN 106654575B CN 201610976724 A CN201610976724 A CN 201610976724A CN 106654575 B CN106654575 B CN 106654575B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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Abstract
The invention discloses a metal rear cover near field antenna device and communication equipment, wherein the metal rear cover comprises an upper end part and an upper antenna arranged on the inner side of the upper end part; the near-field antenna is shared with the upper antenna, and is connected with a feed circuit, a first grounding circuit and a second grounding circuit, and the feed circuit and the grounding circuit are used for resonantly coupling out the working frequency of the near-field antenna; the connection point of the near field antenna and the feed circuit is a feed point, and the connection points of the near field antenna, the first grounding circuit and the second grounding circuit are a first grounding point and a second grounding point respectively; the feeding point and the first grounding point are respectively positioned at the frames at the left side and the right side of the upper end part of the metal rear cover, and the second grounding point is positioned at the frame at the upper end part between the feeding point and the first grounding point. Through the mode, the near field communication function of the all-metal communication equipment can be improved.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a metal rear cover near field antenna device and communication equipment.
Background
Near Field Communication (NFC), also known as Near Field Communication, is a short-range high-frequency wireless Communication technology that allows contactless point-to-point data transmission (within ten centimeters) between electronic devices. Because the near field communication has natural security, the technology is considered to have great application prospect in the fields of mobile phone payment and the like.
At present, the mainstream scheme for realizing the NFC technology is to attach a coil antenna to the inner surface of a non-metal shell and tune the operating frequency to 13.56 MHZ. However, with the rapid development of all-metal mobile phones, the metal mobile phone back shell may affect the performance of NFC, and even may lose the performance of NFC in severe cases.
Disclosure of Invention
The invention mainly solves the technical problem of providing a metal rear cover near field antenna device and communication equipment, which can improve the NFC performance of the metal communication equipment.
In order to solve the technical problems, the invention adopts a technical scheme that: there is provided a metal back cover near field antenna device, the metal back cover including an upper end portion, an upper antenna disposed inside the upper end portion, the metal back cover near field antenna device including: the near-field antenna is shared with the upper antenna and is connected with a feed circuit, a first grounding circuit and a second grounding circuit, and the feed circuit and the grounding circuit are used for resonantly coupling out of the working frequency of the near-field antenna; the connection point of the near field antenna and the feed circuit is a feed point, and the connection points of the near field antenna, the first grounding circuit and the second grounding circuit are a first grounding point and a second grounding point respectively; the feeding point and the first grounding point are respectively positioned at the frames at the left side and the right side of the upper end part of the metal rear cover, and the second grounding point is positioned at the frame at the upper end part between the feeding point and the first grounding point.
The transverse length of the near-field antenna is D, and the transverse distance from the second grounding point to the feeding point is one eighth to one sixth of the value of D; the length of the transverse length D of the near-field antenna is 50mm-90 mm.
Further, the device comprises a third grounding circuit and/or a fourth grounding circuit, wherein the transverse distance from the feeding point to the position where the third grounding circuit is connected with the near-field antenna is one fourth to one third of the D value; the lateral distance between the position where the fourth grounding circuit is connected with the near-field antenna and the first grounding point is one eighth to one sixth of the value D.
Wherein, the grounding circuit comprises an L-type or pi-type filter circuit; the feed circuit comprises an L-shaped filter circuit and a first inductor which are connected in series, or a pi-shaped filter circuit and a second inductor which are connected in series.
In order to solve the technical problem, the invention adopts another technical scheme that: there is provided a communication device comprising a metal back cover near field antenna arrangement, the metal back cover comprising an upper end, an upper antenna disposed inside the upper end, the metal back cover near field antenna arrangement comprising: the near-field antenna is shared with the upper antenna and is connected with a feed circuit, a first grounding circuit and a second grounding circuit, and the feed circuit and the grounding circuit are used for resonantly coupling out of the working frequency of the near-field antenna; the connection point of the near field antenna and the feed circuit is a feed point, and the connection points of the near field antenna, the first grounding circuit and the second grounding circuit are a first grounding point and a second grounding point respectively; the feeding point and the first grounding point are respectively positioned at the frames at the left side and the right side of the upper end part of the metal rear cover, and the second grounding point is positioned at the frame at the upper end part between the feeding point and the first grounding point.
The transverse length of the near-field antenna is D, and the transverse distance from the second grounding point to the feeding point is one eighth to one sixth of the value of D; the length of the transverse length D of the near-field antenna is 50mm-90 mm.
The device further comprises a third grounding circuit and/or a fourth grounding circuit, and the transverse distance from the position where the third grounding circuit is connected with the near-field antenna to the feed point is one fourth to one third of the value D; the lateral distance between the position where the fourth grounding circuit is connected with the near-field antenna and the first grounding point is one eighth to one sixth of the value D.
Wherein, the grounding circuit comprises an L-type or pi-type filter circuit; the feed circuit comprises an L-shaped filter circuit and a first inductor which are connected in series, or a pi-shaped filter circuit and a second inductor which are connected in series.
The invention has the beneficial effects that: different from the situation of the prior art, the near field antenna is shared with the upper antenna on the inner side of the upper end part of the metal rear cover, the metal branch of the upper antenna is connected with the feed circuit and the grounding circuit at different positions, the working frequency of the near field antenna is coupled out to be 13.56MHZ, the near field antenna does not need to be additionally arranged, and the near field communication function of the all-metal communication equipment can be improved.
Drawings
FIG. 1 is a top view of one embodiment of a metal back cover of the present invention;
FIG. 2 is an enlarged schematic view of the upper end of the metal back cover of FIG. 1;
FIG. 3 is a schematic diagram of several embodiments of an upper antenna;
FIG. 4 is a schematic diagram of a metal back cover near field antenna circuit of the present invention;
fig. 5 is a schematic structural diagram of an embodiment of the communication device of the present invention.
Detailed Description
Referring to fig. 1, fig. 1 is a top view of a metal back cover according to an embodiment of the present invention. The metal back cover 1 includes an upper end portion 11, and an upper antenna 12 disposed inside the upper end portion 11, where the position of the upper antenna 12 is schematically indicated in the present embodiment, and the specific structure thereof is not shown in detail. At present, the back cover of an all-metal mobile phone is generally in a three-section type, the metal back cover 1 includes an upper gap 13 and a lower gap 14, the metal back cover 1 is divided into an upper end portion 11, a middle end portion 15 and a lower end portion 16 by the gaps 13 and 14, the widths of the gaps 13 and 14 are generally between 1.0mm and 2.0mm, and the gaps 13 and 14 can be filled with plastics.
Referring to fig. 2, fig. 2 is an enlarged view of an upper end portion of the metal back cover in fig. 1. In this embodiment, the near field antenna is shared by the upper antenna 12, and the metal branch of the upper antenna 12 is connected to the feed circuit, the first ground circuit, and the second ground circuit at different positions, so that the feed circuit and the ground circuit are used to resonantly couple out the operating frequency of the near field antenna, that is, 13.56 MHZ. Referring to fig. 3, the upper antenna may be a one-piece metal plate structure shown in fig. 3(a), and fig. 3(a) is only schematically illustrated, and may actually occur when the one-piece metal plate is punched (such as a camera or a test port) or a portion thereof is cut; the shape of the antenna can also be concave-convex metal sheet in fig. 3(b), and the concave-convex metal sheet is formed by connecting a transverse rectangular metal sheet and a longitudinal rectangular metal sheet which are equal in width; the shape of the upper antenna can also be a sawtooth type metal sheet in fig. 3 (c). In other embodiments, the shape of the upper antenna may be other, and the shape of the upper antenna is not limited in this embodiment. Depending on the specifications and shapes of the upper antenna, the number and positions of the feed circuit and the ground circuit to be connected, the power of the circuit element, and the like may be varied according to actual conditions in order to couple out the operating frequency of the near-field antenna.
Referring to fig. 2, the connection point of the near field antenna and the feeding circuit is a feeding point 21, and the connection points of the near field antenna and the first and second grounding circuits are a first grounding point 22 and a second grounding point 23, respectively; the feeding point 21 and the first grounding point 22 are respectively located at the frames of the left and right sides of the upper end portion 11 of the metal rear cover 1, and the second grounding point 23 is located at the frame of the upper end portion 11 between the feeding point 21 and the first grounding point 22. Wherein, the transverse length of the near-field antenna is D, and the transverse distance from the second grounding point 23 to the feeding point 21 is one eighth to one sixth of the value of D; the lateral length D of the near field antenna is, for example, 50mm to 90mm in length.
Referring to fig. 2, in other embodiments, the two grounding circuits and the feeding circuit still cannot couple out the operating frequency of the near field antenna, and a third grounding circuit and/or a fourth grounding circuit may be coupled to the near field antenna, where a lateral distance from the third grounding point 24 to the feeding point 21 is one quarter to one third of the value of D; the fourth grounding point 25, which is the location where the fourth grounding circuit is connected to the near field antenna, is at a lateral distance from the first grounding point 22 of one eighth to one sixth of the value of D.
For example, in a specific embodiment, the lateral length D of the near field antenna has a length of, for example, 70mm, the lateral distance of the second ground point 23 from the feeding point 21 is 10mm, the lateral distance of the third ground point 24 from the feeding point 21 is 20mm, and the lateral distance of the fourth ground point 25 from the feeding point 21 is 60 mm.
For example, in a further specific embodiment, the lateral length D of the near field antenna has a length of, for example, 90mm, the lateral distance of the second ground point 23 from the feeding point 21 is 15mm, the lateral distance of the third ground point 24 from the feeding point 21 is 30mm, and the lateral distance of the fourth ground point 25 from the feeding point 21 is 77 mm.
For example, in a further embodiment, the lateral length D of the near field antenna is, for example, 50mm in length, and the second ground point 23 is at a lateral distance of 7mm from the feed point 21.
For example, in another specific embodiment, the lateral length D of the near field antenna has a length of, for example, 60mm, the lateral distance of the second ground point 23 from the feeding point 21 is 8mm, the lateral distance of the third ground point 24 from the feeding point 21 is 15mm, and the lateral distance of the fourth ground point 25 from the feeding point 21 is 50 mm.
Referring to fig. 4, fig. 4 is a schematic diagram of a metal back cover near field antenna circuit according to the present invention. The grounding circuit comprises an L-shaped or pi-shaped filter circuit; the feed circuit comprises an L-shaped filter circuit and a first inductor which are connected in series, or a pi-shaped filter circuit and a second inductor which are connected in series. The near field antenna 41 is connected to a radio frequency circuit 47 by connecting a plurality of ground circuits 42, 43, 44, and 45 and a feed circuit 46 in this order, and the number of the ground circuits can be increased or decreased according to actual circumstances.
In another application scenario, regardless of the shape of the near field antenna, the parameters of the second ground circuit are set to be adjustable, and the operating frequency of the near field antenna can be resonantly coupled by adjusting the parameters of the second ground circuit.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of a communication device 51, such as a portable communication device like a mobile phone or an IPD, including a metal back cover near field antenna device in any of the above embodiments, which is not described herein again. When the NFC functionality is enabled by the user, the feed circuit and the several ground circuits connected to the upper antenna in the communication device 51 start to operate, resonantly coupling out the operating frequency of the near field antenna. Or when the user enables the NFC functionality, the parameters of the ground circuit connected to the upper antenna within the communication device 51 are adjusted in real time until the resonant coupling is out of the operating frequency of the near field antenna.
Different from the situation of the prior art, the near field antenna is shared with the upper antenna on the inner side of the upper end part of the metal rear cover, the metal branch of the upper antenna is connected with the feed circuit and the grounding circuit at different positions, the working frequency of the near field antenna is coupled out to be 13.56MHZ, no additional antenna is needed, and the near field communication function of the all-metal communication equipment can be improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides a lid near field antenna device behind metal, lid behind metal includes the upper end, sets up the inboard last antenna of upper end, its characterized in that, lid near field antenna device includes behind metal:
the near-field antenna is shared with the upper antenna and is connected with a feed circuit, a first grounding circuit, a second grounding circuit, a third grounding circuit and/or a fourth grounding circuit, and the feed circuit and the grounding circuit are used for resonantly coupling out the working frequency of the near-field antenna;
the connection point of the near-field antenna and the feed circuit is a feed point, and the connection points of the near-field antenna and the first, second, third and fourth ground circuits are respectively a first ground point, a second ground point, a third ground point and a fourth ground point; the feeding point and the first grounding point are respectively positioned at frames on the left side and the right side of the upper end part of the metal rear cover, and the second grounding point is positioned at the frame of the upper end part between the feeding point and the first grounding point; the transverse length of the near-field antenna is D, and the transverse distance from the position where the third grounding circuit is connected with the near-field antenna to the feed point is one fourth to one third of the value of D; the lateral distance between the position where the fourth grounding circuit is connected with the near-field antenna and the first grounding point is one eighth to one sixth of the value D.
2. The apparatus of claim 1, wherein:
the second grounding point has a lateral distance from the feeding point of one eighth to one sixth of the value of D.
3. The apparatus of claim 2, wherein:
the length of the transverse length D of the near-field antenna is 50mm-90 mm.
4. The apparatus of claim 1,
the grounding circuit comprises an L-shaped or pi-shaped filter circuit;
the feed circuit comprises an L-shaped filter circuit and a first inductor which are connected in series, or a pi-shaped filter circuit and a second inductor which are connected in series.
5. A communication device is characterized by comprising a metal back cover near field antenna device, wherein the metal back cover comprises an upper end part and an upper antenna arranged on the inner side of the upper end part,
the metal back cover near field antenna device comprises: the near-field antenna is shared with the upper antenna and is connected with a feed circuit, a first grounding circuit, a second grounding circuit, a third grounding circuit and/or a fourth grounding circuit, and the feed circuit and the grounding circuit are used for resonantly coupling out the working frequency of the near-field antenna;
the connection point of the near field antenna and the feed circuit is a feed point, and the connection points of the near field antenna, the first grounding circuit and the second grounding circuit are respectively a first grounding point, a second grounding point, a third grounding point and a fourth grounding point; the feeding point and the first grounding point are respectively positioned at frames on the left side and the right side of the upper end part of the metal rear cover, and the second grounding point is positioned at the frame of the upper end part between the feeding point and the first grounding point; the transverse length of the near-field antenna is D, and the transverse distance from the position where the third grounding circuit is connected with the near-field antenna to the feed point is one fourth to one third of the value of D; the lateral distance between the position where the fourth grounding circuit is connected with the near-field antenna and the first grounding point is one eighth to one sixth of the value D.
6. The apparatus of claim 5, wherein:
the second ground point is disposed at a lateral distance from the feed point of one eighth to one sixth of the value of D.
7. The apparatus of claim 6, wherein:
the length of the transverse length D of the near-field antenna is 50mm-90 mm.
8. The apparatus of claim 5,
the grounding circuit comprises an L-shaped or pi-shaped filter circuit;
the feed circuit comprises an L-shaped filter circuit and a first inductor which are connected in series, or a pi-shaped filter circuit and a second inductor which are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610976724.9A CN106654575B (en) | 2016-11-04 | 2016-11-04 | Lid near field antenna device and communication equipment behind metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610976724.9A CN106654575B (en) | 2016-11-04 | 2016-11-04 | Lid near field antenna device and communication equipment behind metal |
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| Publication Number | Publication Date |
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| CN106654575A CN106654575A (en) | 2017-05-10 |
| CN106654575B true CN106654575B (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610976724.9A Active CN106654575B (en) | 2016-11-04 | 2016-11-04 | Lid near field antenna device and communication equipment behind metal |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207052767U (en) * | 2017-05-12 | 2018-02-27 | 中兴通讯股份有限公司 | Antenna circuit, coupling module and Wireless Telecom Equipment for antenna conversion |
| CN111279549B (en) * | 2018-04-24 | 2022-01-14 | 华为技术有限公司 | Near field communication antenna system and terminal equipment |
| CN212783782U (en) * | 2020-09-01 | 2021-03-23 | Oppo广东移动通信有限公司 | Electronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098352A (en) * | 2015-07-31 | 2015-11-25 | 瑞声精密制造科技(常州)有限公司 | Mobile terminal |
| CN105261834A (en) * | 2015-09-16 | 2016-01-20 | 惠州硕贝德无线科技股份有限公司 | Near-field communication antenna assembly and mobile equipment |
| CN105940550A (en) * | 2014-03-03 | 2016-09-14 | 苹果公司 | Electronic device with shared antenna structures and balun |
| CN106025509A (en) * | 2016-07-12 | 2016-10-12 | 广东欧珀移动通信有限公司 | Shell, antenna device and mobile terminal |
Family Cites Families (1)
| 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 |
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- 2016-11-04 CN CN201610976724.9A patent/CN106654575B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105940550A (en) * | 2014-03-03 | 2016-09-14 | 苹果公司 | Electronic device with shared antenna structures and balun |
| CN105098352A (en) * | 2015-07-31 | 2015-11-25 | 瑞声精密制造科技(常州)有限公司 | Mobile terminal |
| CN105261834A (en) * | 2015-09-16 | 2016-01-20 | 惠州硕贝德无线科技股份有限公司 | Near-field communication antenna assembly and mobile equipment |
| CN106025509A (en) * | 2016-07-12 | 2016-10-12 | 广东欧珀移动通信有限公司 | Shell, antenna device and mobile terminal |
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| CN106654575A (en) | 2017-05-10 |
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Effective date of registration: 20200915 Address after: 6 / F, No.5, Lane 999, Yangfan Road, hi tech Zone, Ningbo City, Zhejiang Province Patentee after: TCL COMMUNICATION (NINGBO) Co.,Ltd. Address before: 518063 Guangdong city of Shenzhen province Nanshan District ten South Road West High Technology South Road North Tower B 16 floor TCL Patentee before: Jiekai communication (Shenzhen) Co.,Ltd. |