CN210142718U - Miniaturized near field communication antenna and mobile terminal - Google Patents
Miniaturized near field communication antenna and mobile terminal Download PDFInfo
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- CN210142718U CN210142718U CN201921098716.4U CN201921098716U CN210142718U CN 210142718 U CN210142718 U CN 210142718U CN 201921098716 U CN201921098716 U CN 201921098716U CN 210142718 U CN210142718 U CN 210142718U
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Abstract
The utility model discloses a miniaturized near field communication antenna and mobile terminal, this miniaturized near field communication antenna is including the plane coil that inlays in the base plate, the plane coil includes relative first part wire and the second part wire that sets up, and the diameter of first part wire is greater than the diameter of second part wire, it is through setting up magnetic sheet and magnetic induction line cutting piece respectively at base plate both sides face, the magnetic sheet covers the region that thick wire is located, be used for pressing the useful magnetic induction line that is close to the magnetic sheet into the magnetic sheet, make magnetic field be located magnetic sheet one side with compressing useful magnetic field space; the magnetic induction line cutting piece covers the area where the thin conducting line is located and is used for cutting the magnetic induction lines generated by the thin conducting line, destroying useless magnetic fields, avoiding the phenomenon that the magnetic induction lines which are relatively close and opposite in direction are mutually offset, improving the emission energy of the miniaturized near-field antenna when a read-write card and a card are simulated, improving the overall performance of the antenna, and further realizing the miniaturization of the near-field antenna so as to be suitable for small electronic equipment.
Description
Technical Field
The utility model relates to an antenna field, in particular to miniaturized near field communication antenna and mobile terminal.
Background
Near Field Communication (Near Field Communication) is an emerging technology, devices (such as mobile phones) using Near Field Communication technology can exchange data under the condition of being close to each other, is integrated and evolved from non-contact Radio Frequency Identification (RFID) and interconnection and intercommunication technology, and realizes applications such as mobile payment, electronic ticketing, entrance guard, mobile identity recognition, anti-counterfeiting and the like by integrating functions of an induction type card reader, an induction type card and point-to-point Communication on a single chip and utilizing a mobile terminal. The near field communication service combines the near field communication technology and the mobile communication technology, realizes multiple functions of electronic payment, identity authentication, ticketing, data exchange, anti-counterfeiting, advertisement and the like, and is a novel service in the field of mobile communication. The near field communication service changes the mode of using the mobile phone by the user, so that the consumption behavior of the user gradually becomes electronization, and a novel user consumption and service mode is established.
Along with the development of science and technology, many electronic products, the function is more powerful, and the space of reserving for the antenna is littleer and more, and on the other hand market competition pressure is bigger and bigger, so the requirement to the miniaturization of antenna is inevitable trend, and after the antenna is miniaturized, not only the product that the characteristic is good will be designed in limited space, but also the cost of saving that can be great to improve market competition.
Therefore, in order to adapt to small electronic products, the size of the near-field antenna is reduced, that is, the size of the substrate is reduced, and the wire diameter of the planar coil in the antenna is reduced. The problems thus posed are: because the substrate becomes narrower after being reduced in size, the distance between the opposing wires is very close. When the planar coil is energized, as shown in fig. 1, the directions of currents between relatively close wires are opposite, the directions of generated magnetic induction lines are opposite, and the magnetic induction lines in the overlapped areas of the magnetic induction lines are mutually offset, so that the transmission energy of the antenna during the card reading and writing and card simulation is influenced, and the overall performance of the near-field antenna is influenced.
Of course, some miniaturized near-field antennas cover all of the planar coils with magnetic sheets, but the above problems cannot be effectively solved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of the prior art, the embodiment of the utility model provides a miniaturized near field communication antenna and mobile terminal, its occupation space is little, and the gain is high.
In order to solve the technical problem, the utility model provides a following technical scheme:
in one aspect, the utility model provides a miniaturized near field communication antenna, miniaturized near field communication antenna includes the base plate, inlays to locate in the base plate and locate by wire coil plane coil, the subsides of formation the magnetic sheet and the subsides of base plate one side are located the magnetic induction wire-electrode cutting piece of base plate another side, plane coil is at least including relative first part wire and the second part wire that sets up, just the wire diameter of first part wire is greater than the wire diameter of second part wire, the magnetic sheet covers first part wire is regional in place, magnetic induction wire-electrode cutting piece covers second part wire is regional in place.
In some embodiments, the magnetically susceptible wire cut piece is a metal sheet.
Preferably, the magnetically induced wire cutting member is one of a copper foil, an iron foil, a lead foil or a nickel foil.
In some embodiments, a projection of the magnetic sheet on the substrate and a projection of the magnetically sensitive wire-cut element on the substrate at least partially coincide.
In some embodiments, a projection of the magnetic sheet on the substrate is not coincident with a projection of the magnetically sensitive wire cut on the substrate.
In some embodiments, the area of the miniaturized near field communication antenna does not exceed 500mm2。
In some embodiments, the planar coil comprises a planar coil body portion and a planar coil extension portion, the planar coil body portion and planar coil extension portion forming a zig-zag loop, the planar coil comprising a head end and a tail end, and the head end and tail end both being located at the planar coil extension portion.
In some embodiments, the planar coil body portion is one of circular, quadrilateral, hexagonal, or octagonal in shape.
Preferably, the planar coil body is rectangular, the planar coil body includes a first part of wires, a third part of wires, a second part of wires and a fourth part of wires which are connected in sequence, and the diameters of the third part of wires and the fourth part of wires are equal.
In some embodiments, the wire diameters of the third and fourth portions of wires are smaller than the wire diameter of the first portion of wires.
On the other hand, the utility model provides a mobile terminal, mobile terminal includes miniaturized near field communication antenna.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is:
the utility model provides a miniaturized near field communication antenna, it is including inlaying the plane coil of locating the base plate, because current direction is opposite in the wire that sets up relatively, the magnetic field that both produced exists the condition of offsetting each other, consequently set up the wire relatively in the plane coil to the structure that wire diameter thickness is unequal, the magnetic field of thick wire part's production is useful magnetic field, its area that occupies is bigger in the base plate, thereby improve magnetic induction line intensity and region, and the magnetic field that thin wire part produced is useless magnetic field, purely play the effect of switching on, can reduce the magnetic induction line intensity and the region of this part useless magnetic field, thereby the magnetic flux offset of two kinds of magnetic fields has been reduced;
furthermore, the magnetic sheets and the magnetic induction wire cutting pieces are respectively arranged on the two side surfaces of the substrate, and the magnetic sheets cover the areas where the thick wires are located and are used for compressing useful magnetic induction wires close to the magnetic sheets into the magnetic sheets so as to compress magnetic field spaces generated by the thick wires to enable the magnetic fields to be located on one sides of the magnetic sheets; the magnetic induction line cutting piece covers the area where the thin conducting line is located and is used for cutting the magnetic induction lines generated by the thin conducting line and destroying the useless magnetic field, so that the counteracting effect of the useless magnetic induction lines on the useful magnetic induction lines is avoided, and the useful magnetic field is further enhanced;
in addition, the thick wire and the thin wire which are arranged oppositely, and the magnetic sheet and the magnetic induction wire cutting piece which are respectively attached are arranged, so that the miniaturization of the near field communication antenna can be further realized, and based on the teaching of the technology, the size and the direction of the magnetic field of the near field antenna can be effectively controlled, and the performance of the near field communication antenna can be flexibly arranged.
The scheme of the application only needs to solve any technical problem.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of distribution of magnetic induction lines of a miniaturized NFC antenna without a magnetic sheet and a magnetic induction line cutter provided in the background art;
fig. 2 is a schematic structural diagram of a surface of a miniaturized nfc antenna according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another surface of a miniaturized nfc antenna according to an embodiment of the present invention;
fig. 4 is a schematic diagram of magnetic induction line distribution when a projection of a magnetic sheet of a miniaturized nfc antenna provided by an embodiment of the present invention on a substrate and a projection of a magnetic induction line cutting element on the substrate at least partially coincide;
fig. 5 is a schematic diagram of magnetic induction lines distribution when a projection of a magnetic sheet of a miniaturized nfc antenna on a substrate and a projection of a magnetic induction line cutter on the substrate do not coincide with each other.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "X axis", "Y axis", "Z axis", "vertical", "parallel", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific structure of a miniaturized near field communication antenna protected by the present invention is described in detail below with reference to fig. 2 to 5.
Example 1
As shown in fig. 2 to 5, the present embodiment provides a miniaturized nfc antenna, which includes a miniaturized nfc antenna 100 disposed therein for performing card/read/write and card simulation, wherein the area of the nfc antenna 100 is not more than 500mm2Corresponding electronic elements are integrated on the near field communication antenna 100, and multiple functions of mobile payment, electronic ticketing, entrance guard, mobile identity recognition, anti-counterfeiting, advertisement and the like are realized by using mobile terminals such as mobile phones, tablets and the like.
Specifically, referring to fig. 2 to 3, the miniaturized nfc antenna 100 includes a substrate 1, a planar coil 2 embedded in the substrate 1 and formed by winding a conductive wire, a magnetic sheet 3 attached to one surface of the substrate 1, and a magnetically sensitive wire cutter 4 attached to the other surface of the substrate 1. For convenience of description, in the present embodiment, the substrate surface to which the magnetic sheet 3 is attached is a front surface, and the substrate surface to which the magnetic wire-cutting element 4 is attached is a back surface. The number of turns of the planar coil 2 is not limited, and each turn of the coil is located in the same plane, namely the plane of the substrate 1.
The planar coil 2 at least comprises a first part of conducting wires 5 and a second part of conducting wires 6 which are oppositely arranged, and the conducting wire diameter of the first part of conducting wires 5 is larger than that of the second part of conducting wires 6. Since the planar coil 2 is formed by winding a conductive wire, when the planar coil is energized, the directions of currents in the first partial conductive wire 5 and the second partial conductive wire 6 which are oppositely arranged (as shown in fig. 3) are opposite, that is, the directions of magnetic fields generated by the two are opposite, and the magnetic fields are mutually cancelled out by the overlapped area of the two magnetic fields. Further, when the power is on, the current in the same wire is the same, and the magnetic field generated by the thicker first part of wires 5 is stronger. Considering the requirement of the overall performance of the antenna, when high transmission energy is needed, a strong magnetic field generated by the first part of conducting wire 5 is used as a useful magnetic field to protect the useful magnetic field, and a small magnetic field generated by the second part of conducting wire 6 is used as a useless magnetic field to destroy the useless magnetic field, so that the useful magnetic induction lines are prevented from being offset or weakened by the useless magnetic induction lines in the overlapping region of the useless magnetic field and the useful magnetic field, and the overall performance of the antenna is influenced.
The magnetic sheet 3 covers at least the useful conductor portion, but may cover the entire front surface of the substrate 1, which is not limited in this embodiment. In order to achieve the technical effect and save materials, the magnetic sheet 3 in this embodiment is in a half-covering type, that is, not covering all the planar coils 2, and only covering the useful first portion of the conducting wires 5, so that the magnetic induction lines of the useful magnetic field are compressed into the magnetic sheet when approaching the magnetic sheet, so as to compress the magnetic field space generated by the useful conducting wires to be only located on one side of the magnetic sheet 3. The magnetic induction wire cutter 4 covers the unnecessary lead portion and cuts the magnetic induction wire generated in the unnecessary lead portion, thereby destroying the unnecessary magnetic field. Generally, the magnetically sensitive wire-cutting member 4 is made of a metal sheet, such as one of iron foil, copper foil, aluminum foil, lead foil, or nickel foil.
In this embodiment, since the maximum coverage area of the magnetic sheet 3 is not limited (half or full coverage of the substrate 1), the relative positions of the magnetic sheet 3 and the magnetically sensitive wire-cutting element 4 include at least the following two cases: the projection of the magnet sheet 3 on the substrate 1 is at least partially overlapped with the projection of the magnetic wire-cut piece 4 on the substrate 2, or the projection of the magnet sheet 3 on the substrate 1 is not overlapped with the projection of the magnetic wire-cut piece 4 on the substrate 1. When the two projections are at least partially overlapped, the magnetic fields generated by the first part of wires 5 and the second part of wires 6 in the nfc antenna 100 are as shown in fig. 4; when the two projections do not coincide, the magnetic fields generated by the first part of wires 5 and the second part of wires 6 in the nfc antenna 100 are as shown in fig. 5. As can be seen from fig. 4 to 5, regardless of whether the projection of the magnetic sheet 3 on the substrate 1 and the projection of the magnetic wire-cutting element 4 on the substrate 2 coincide with each other, as long as the magnetic sheet 3 covers the first portion of the conductive wires 5 and the magnetic wire-cutting element 4 covers the second portion of the conductive wires 6, the effect of selectively compressing the useful magnetic field and destroying the useless magnetic field can be achieved, so as to improve the overall performance of the antenna.
In the above two situations, the magnetic field of the nfc antenna 100 in this embodiment is the magnetic field generated by the first part of the conductive wires 5, and after the magnetic field of the second part of the conductive wires 6 is destroyed, the part of the conductive wires only plays a role in conduction.
In a preferred embodiment, the first portion of the conductive wires 5 in this embodiment have a wire diameter of 1 ± 0.05mm, and the second portion of the conductive wires 6 have a wire diameter of 0.15 ± 0.05 mm.
Referring to fig. 2 to 3, in the nfc antenna 100 of the present embodiment, the planar coil 2 includes a planar coil main body portion 21 and a planar coil extension portion 22, and the planar coil main body portion 21 and the planar coil extension portion 22 form a loop in a shape of a Chinese character 'tu'. The planar coil 2 includes a head end 23 connected to the receiving end jumper and a tail end 24 connected to the transmitting end jumper, and the head end 23 and the tail end 24 are both located in the planar coil extension 22.
Suitably, as shown in fig. 3, the substrate 1 is also in a convex structure. On the back surface of the substrate 1, the magnetic induction wire cutting element 4 may cover the area where the second portion of the conductive wire 6 is located, or may extend upward to a protruding area, which is not limited in this embodiment.
The shape of the planar coil main body part 21 is one of a circle, a quadrangle, a hexagon, or an octagon, and it is preferable that the shape of the planar coil main body part 21 is a rectangle. When the planar coil main body part 21 is rectangular, the planar coil main body part 21 includes a first part of wires 5, a third part of wires 7, a second part of wires 6 and a fourth part of wires 8 which are connected in sequence, and the diameters of the third part of wires 7 and the fourth part of wires 8 are equal and are smaller than the diameter of the first part of wires 5. Since the third portion of conductive wires 7 and the fourth portion of conductive wires 8 are disposed oppositely and the directions of the currents are opposite when they are energized (as shown by the arrows in fig. 3), the generated magnetic fields and the regions are equal and opposite, so that the two magnetic fields cancel each other out and have no influence on the magnetic field generated by the first portion of conductive wires 5.
In a preferred embodiment, the diameters of the second portion of conductive lines 6, the third portion of conductive lines 7 and the fourth portion of conductive lines 8 are all equal to 0.15 ± 0.05mm, so as to simplify the process.
The miniaturized near field communication antenna provided by the embodiment comprises a planar coil embedded in a substrate, wherein the planar coil comprises a first part of conducting wire 5 and a second part of conducting wire 6 which are oppositely arranged, the diameter of the first part of conducting wire 5 is larger than that of the second part of conducting wire 6, a magnetic sheet and a magnetic induction wire cutting piece are respectively arranged on two side faces of the substrate, the magnetic sheet covers the area where the thick conducting wire is located, and the magnetic sheet is used for pressing a useful magnetic induction wire close to the magnetic sheet into the magnetic sheet so as to compress a magnetic field space generated by the thick conducting wire and enable a magnetic field to be located on one side of the magnetic sheet; the magnetic induction line cutting piece covers the area where the thin conducting line is located and is used for cutting the magnetic induction lines generated by the thin conducting line and destroying useless magnetic fields, so that the phenomenon that the magnetic induction lines in opposite directions generated between the conducting lines which are relatively close and have opposite current directions are mutually offset is avoided, the emission energy of the miniaturized near field antenna during the simulation of reading and writing cards and cards is improved, the overall performance of the near field antenna is improved, the miniaturization of the near field antenna is further realized, and the miniaturized near field antenna is suitable for small electronic equipment.
Example 2.
The embodiment provides a mobile terminal, wherein the miniaturized near field communication antenna described in embodiment 1 is arranged in the mobile terminal, and is used for implementing multiple functions of mobile payment, electronic ticketing, entrance guard, mobile identity recognition, anti-counterfeiting, advertisement and the like by using mobile terminals such as mobile phones and tablets. When the miniaturized nfc antenna is applied to a mobile terminal, it should be noted that the area of the back surface corresponding to the first portion of the conductive wire 5 is not close to the metal components or the battery in the mobile terminal, so as not to damage the useful magnetic field. Preferably, the back surface of the miniaturized nfc antenna is attached to the inner surface of the plastic case.
For the structure and the implementation effect of the miniaturized nfc antenna, please refer to the corresponding content in embodiment 1, which is not described in detail in this embodiment.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A miniaturized near field communication antenna, characterized by: miniaturized near field communication antenna includes the base plate, inlays to be located in the base plate and by the planar coil, the subsides that the wire coiled formation locate the magnetic sheet of base plate one side and subsides are located the magnetic wire cutting spare is felt to the magnetism of base plate another side, planar coil is at least including relative first part wire and the second part wire that sets up, just the wire diameter of first part wire is greater than the wire diameter of second part wire, the magnetic sheet covers first part wire is regional, the magnetic wire cutting spare that feels covers second part wire is regional.
2. A miniaturized near field communication antenna according to claim 1, characterized in that: the magnetic induction wire cutting piece is a metal sheet.
3. A miniaturized near field communication antenna according to claim 2, characterized in that: the projection of the magnetic sheet on the substrate is at least partially overlapped with the projection of the magnetic induction wire cutting piece on the substrate.
4. A miniaturized near field communication antenna according to claim 2, characterized in that: the projection of the magnetic sheet on the substrate is not overlapped with the projection of the magnetic induction wire cutting piece on the substrate.
5. A miniaturized near field communication antenna according to claim 3 or 4, characterized in that: the area of the miniaturized near field communication antenna is not more than 500mm2。
6. A miniaturized near field communication antenna according to claim 5, characterized in that: the planar coil comprises a planar coil main body part and a planar coil extension part, wherein the planar coil main body part and the planar coil extension part form a convex loop, the planar coil comprises a head end and a tail end, and the head end and the tail end are both located on the planar coil extension part.
7. A miniaturized near field communication antenna according to claim 6, characterized in that: the planar coil body portion has one of a circular, quadrangular, hexagonal, or octagonal shape.
8. A miniaturized near field communication antenna according to claim 6, characterized in that: the planar coil body is rectangular, and the planar coil body comprises a first part of wires, a third part of wires, a second part of wires and a fourth part of wires which are connected in sequence, wherein the diameters of the third part of wires and the fourth part of wires are equal.
9. A miniaturized near field communication antenna according to claim 8, characterized in that: the diameters of the third part of conducting wires and the fourth part of conducting wires are smaller than the diameter of the first part of conducting wires.
10. A mobile terminal characterized by comprising a miniaturized near field communication antenna according to any of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921098716.4U CN210142718U (en) | 2019-07-12 | 2019-07-12 | Miniaturized near field communication antenna and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921098716.4U CN210142718U (en) | 2019-07-12 | 2019-07-12 | Miniaturized near field communication antenna and mobile terminal |
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| CN210142718U true CN210142718U (en) | 2020-03-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416715A (en) * | 2019-07-12 | 2019-11-05 | 禾邦电子(苏州)有限公司 | A kind of miniaturization near-field communication aerial and mobile terminal |
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2019
- 2019-07-12 CN CN201921098716.4U patent/CN210142718U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416715A (en) * | 2019-07-12 | 2019-11-05 | 禾邦电子(苏州)有限公司 | A kind of miniaturization near-field communication aerial and mobile terminal |
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