CN211605406U - Antenna device and electronic apparatus - Google Patents
Antenna device and electronic apparatus Download PDFInfo
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- CN211605406U CN211605406U CN202020641216.7U CN202020641216U CN211605406U CN 211605406 U CN211605406 U CN 211605406U CN 202020641216 U CN202020641216 U CN 202020641216U CN 211605406 U CN211605406 U CN 211605406U
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Abstract
The application provides an antenna device and an electronic device. The antenna device includes: dielectric substrate, antenna coil and conductive piece. The antenna coil is arranged on the medium substrate and comprises a winding central part, at least one first conductor section and at least one second conductor section, wherein the at least one first conductor section and the at least one second conductor section are arranged on two opposite sides of the winding central part, and the first conductor section and the second conductor section are connected in series. The conductive piece is arranged on the dielectric substrate, the conductive piece is arranged opposite to the antenna coil, and the orthographic projection of the conductive piece on the dielectric substrate covers the orthographic projection of at least part of the first conductor section on the dielectric substrate. The conductive member is electrically connected to the first conductor section, and the magnetic field generated by the conductive member is used for counteracting the magnetic field generated by the first conductor section. The antenna device provided by the application has the advantage that the second conductor segment has better communication performance as a main radiator.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to an antenna device and an electronic apparatus.
Background
Data exchange is performed in the electronic device through Near Field Communication (NFC) technology, so as to realize functions of mobile payment, electronic ticketing, door access, mobile identity recognition, anti-counterfeiting and the like.
However, the space inside the electronic device is limited, and the NFC antenna needs to meet the demand for miniaturization. The structure of the miniaturized NFC antenna is limited by the space in the electronic equipment, so that the magnetic fields generated by coils in the overlapped area of the space magnetic fields of the miniaturized NFC antenna are offset, the communication performance of the electronic equipment is reduced, and the communication distance is reduced.
SUMMERY OF THE UTILITY MODEL
The application provides an antenna device and electronic equipment with better communication performance.
In one aspect, an embodiment of the present application provides an antenna device, including a dielectric substrate; the antenna coil is arranged on the dielectric substrate and comprises a winding central part, and at least one first conductor section and at least one second conductor section which are arranged on two opposite sides of the winding central part, wherein the first conductor section is connected with the second conductor section in series; the conductive piece is arranged on the dielectric substrate, the conductive piece is arranged opposite to the antenna coil, and the orthographic projection of the conductive piece on the dielectric substrate covers at least part of the orthographic projection of the first conductor section on the dielectric substrate; the conductive member is electrically connected to the first conductor segment, and the magnetic field generated by the conductive member is used for counteracting the magnetic field generated by the first conductor segment.
On the other hand, this application embodiment still provides an electronic equipment, electronic equipment include the camera module with antenna device, antenna device centers on the camera module sets up or antenna device with the camera module sets up relatively.
The conductive piece is arranged in the antenna device, the conductive piece can generate a magnetic field, the magnetic field can be used for offsetting the magnetic field generated by the first conductor section, when at least part of the magnetic field generated by the first conductor section is offset, the magnetic field of the first conductor section on one side of the winding center part is weakened, therefore, the offset of the magnetic field generated by the first conductor section and the magnetic field generated by the second conductor section in the overlapped area of the two magnetic fields is reduced, the magnetic field strength around the second conductor section is enhanced, and the second conductor section is used as a main radiator, so that the communication distance is prolonged, and the communication performance of the electronic equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an electronic device according to a second embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of a wireless device according to an embodiment of the present application;
FIG. 5 is a cross-sectional view of the wireless device of FIG. 4 in a cross-section taken along line A-A in one embodiment;
FIG. 6 is a cross-sectional view of the wireless device of FIG. 4 in a cross-section taken along line A-A in another embodiment;
fig. 7 is a schematic structural diagram of a wireless device according to a second embodiment of the present application;
fig. 8 is a schematic structural diagram of a wireless device according to a third embodiment of the present application;
fig. 9 is a schematic structural diagram of a wireless device according to a fourth embodiment of the present application;
fig. 10 is a schematic structural diagram of a wireless device according to a fifth embodiment of the present application;
FIG. 11 is a cross-sectional view of the wireless device shown in FIG. 10 in a cross-section taken along line B-B in one embodiment;
FIG. 12 is a cross-sectional view of the wireless device of FIG. 10 in a cross-section taken along line B-B in another embodiment;
fig. 13 is a schematic structural diagram of a wireless device according to a sixth embodiment of the present application.
Fig. 14 is a schematic cross-sectional view of a wireless device provided with a shield according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
As shown in fig. 1, an embodiment of the present application provides an electronic device 100 with a near field communication function. For example, the electronic device 100 may be a mobile phone, a tablet computer, a laptop computer, a handheld computer, a notebook computer, a netbook, a media player, a watch, a necklace, glasses, and other devices with mobile communication functions. In the embodiments of the present application, a mobile phone is taken as an example for explanation.
As shown in fig. 1, fig. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic apparatus 100 is provided with an antenna device 10 and a camera module 20. The electronic device 100 realizes a communication function by transmitting data information between the antenna device 10 and an external device. The antenna device 10 is substantially rectangular. In other embodiments, referring to fig. 1 to fig. 3, the antenna device 10 may also be enclosed in a U-shape, an L-shape, etc. to adapt to the situation that the stacking area inside the electronic device 100 is insufficient and the shape is irregular due to the increase of the camera module 20 inside different electronic devices 100, so that the antenna device 10 still has better performance under the condition that the internal space of the electronic device 100 is limited. In other embodiments, the specially-shaped antenna device 10 can also be used for avoiding other antenna modules or electronic devices in the electronic device 100. For example: face identification module, ambient light sensor, distance sensor, iris identification module etc..
The following embodiments will be described taking as an example the antenna device 10 having a substantially rectangular shape. And will not be described in detail later. Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of an antenna device 10 according to an embodiment of the present disclosure. The antenna device 10 includes a dielectric substrate 105, an antenna coil 102, and a conductive member 103.
The present embodiment defines the longitudinal direction of the antenna device 10 as the X-axis direction. The width direction of the antenna device 10 is defined as the Y-axis direction. The thickness direction of the antenna device 10 is defined as the Z-axis direction. Wherein, the direction indicated by the arrow is the positive direction. In the figure, the symbols "·" and "x" indicate the flow direction of the current. C1, C2 and C3 in the figure represent the directions of magnetic fields generated on the dielectric substrate 105 by the current on the first conductive line 122 and the current on the second conductive line 124. And will not be described in detail later.
The dielectric substrate 105 is used for carrying the antenna coil 102 and the conductive member 103. The length, width, and thickness directions of the dielectric substrate 105 may be referred to X-axis, Y-axis, and Z-axis directions of the antenna device, respectively. In one embodiment, the dielectric substrate 105 may be a polyimide film (PI) as a base material of a Flexible Printed Circuit (FPC). Of course, in other embodiments, the dielectric substrate 105 may also be polyethylene terephthalate (PET) or the like.
The antenna coil 102 is referred to as a surrounding wire winding. The antenna coil 102 is provided on the dielectric substrate 105. Specifically, the antenna coil 102 may be located on the surface of the dielectric substrate 105 or inside the dielectric substrate 105. The antenna coil 102 may be formed on the dielectric substrate 105 by any one of a winding process, a printing process, an etching process, or the like.
In one embodiment, referring to fig. 4 and 5, the antenna coil 102 formed on the dielectric substrate 105 includes a winding center 120 and a first conductor segment 122 and a second conductor segment 124 disposed on opposite sides of the winding center 120. Here, the winding center portion 120 refers to a region located between the first conductor segments 122 and the second conductor segments 124.
Specifically, the first conductor segments 122 represent conductive lines located at the winding center portion 120 toward the Y-axis positive direction. The second conductor segments 124 represent conductive lines located in the winding center portion 120 in the opposite direction toward the Y-axis. The number of the first conductor segments 122 and the second conductor segments 124 may be one or more conductive wires, respectively. The first conductor segments 122 and the second conductor segments 124 may include the same or different numbers of conductive lines. It is understood that the first conductor segments 122 and the second conductor segments 124 may be separate conductive wires or the first conductor segments 122 and the second conductor segments 124 may be different portions on the same conductive wire.
In one embodiment, the current flow in the antenna coil 102 is as shown in fig. 4. In fig. 4, I1 and I2 represent the current flow directions of the first conductor segment 122 and the second conductor segment 124, respectively. It will be appreciated that the first conductor segments 122 and the second conductor segments 124, which are located on opposite sides of the winding center portion 120, are connected in series with each other such that the current flowing on the first conductor segments 122 flows in the opposite direction to the current flowing on the second conductor segments 124. The antenna device 10 has a demand for miniaturization, and the distance between the first conductor segment 122 and the second conductor segment 124 is short. Thus, the first conductor segments 122 and the second conductor segments 124 have overlapping regions in magnetic field phase space. The magnetic fields generated by the first conductor segments 122 and the magnetic fields generated by the second conductor segments 124 are in different directions and cancel each other out. The difference between the magnetic field generated by the first conductor segments 122 and the magnetic field generated by the second conductor segments 124 means that the magnetic fields generated by the first conductor segments 122 and the second conductor segments 124 are opposite in direction or have an included angle.
The conductive member 103 is disposed on the dielectric substrate 105. Specifically, the conductive member 103 may be formed on the dielectric substrate 105 by any one of processes such as winding, printing, and etching. The conductive member 103 may be disposed on the surface of the dielectric substrate 105 or inside the dielectric substrate. For example, the antenna coil 102 and the conductive member 103 may be disposed on opposite surfaces of the dielectric substrate 105, respectively. Alternatively, the antenna coil 102 and the conductive member 103 are disposed inside the dielectric substrate 105, and the antenna coil 102 and the conductive member 103 are spaced apart from each other. In one embodiment, the conductive element 103 is relatively close to the first conductor segment 122 and far from the second conductor segment 124. The conductive member 103 is disposed opposite to the antenna coil 102. In one embodiment, the conductive member 103 may be disposed opposite to the antenna coil 102 along a thickness direction of the dielectric substrate 105. It is understood that in other embodiments, the conductive member 103 may be disposed opposite to the antenna coil 102 along the length direction or the width direction of the dielectric substrate 105. In the embodiment of the present application, the conductive member 103 and the antenna coil 102 are disposed opposite to each other in the thickness direction of the dielectric substrate 105.
In another embodiment, the current flow direction on the conductive element 103 is the same as the current flow direction on the first conductor segment 122, such that the magnetic field generated by the current on the conductive element 103 at least partially cancels the magnetic field generated by the current on the first conductor segment 122. Specifically, referring to fig. 4 and 6, the current flow direction I1 on the first conductor segment 122 is reversed along the X-axis. The current flow on conductor 103 is reversed along the X-axis. The first conductor segment 122 generates a magnetic field along the direction C1 in fig. 6 at the dielectric substrate 105. The conductive member 103 generates a magnetic field along the direction C3 in fig. 6 on the dielectric substrate 105. The second conductor segment 124 generates a magnetic field along the direction C2 in fig. 6 at the dielectric substrate 105. The conductive elements 103 and the magnetic field generated by the first conductor segments 122 have opposite directions, so that the magnetic field generated by the first conductor segments 122 can be cancelled, and the influence of the magnetic field generated by the first conductor segments 122 on the magnetic field generated by the second conductor segments 124 can be reduced.
The conductive member 103 may be a conductive wire having a conductive property, such as a nano copper wire and a nano silver wire. In other embodiments, the conductive member 103 may also be a conductive substrate, such as a substrate made of metal, graphene, conductive polymer, or the like.
By providing the conductive member 103 in the antenna device 10, the conductive member 103 can generate a magnetic field that can cancel the magnetic field generated by the first conductor segment 122, and when at least a part of the magnetic field generated by the first conductor segment 122 is canceled, the magnetic field of the first conductor segment 122 on the winding center portion 120 side is weakened, thereby reducing the magnetic field generated by the first conductor segment 122 and the second conductor segment 124 to be canceled in the overlapping region, enhancing the magnetic field strength around the second conductor segment 124, and further using the second conductor segment 124 as a main radiator, extending the communication distance, and improving the communication performance of the electronic apparatus 100.
As shown in fig. 7, the first conductor segments 122 and the second conductor segments 124 may respectively include a plurality of conductive wires having a shape of a circular tube, a square, a rectangle, or the like. In one embodiment, the first conductor segment 122 includes a plurality of first conductive lines 122 a. The second conductor segment 124 includes a plurality of second conductive lines 124 a. The width of the first conductive line 122a may be smaller than the width of the second conductive line 124a in a direction along the first conductor segment 122 toward the second conductor segment 124, i.e., in the Y-axis direction. It is understood that the first conductive line 122a and the second conductive line 124a are conductive lines having different diameters. Wherein second conductive line 124a is thicker and first conductive line 122a is thinner.
By providing the first conductor segments 122 and the second conductor segments 124 as electrically conductive lines having different widths, the first conductor segments 122 are made thinner, and the magnetic field strength generated on the first conductor segments 122 is weaker, so that it is possible to reduce the cancellation of the magnetic field of the second conductor segments 124 by the first conductor segments 122. The second conductor segment 124 is thick, and the magnetic field generated on the second conductor segment 124 is strong, and can be used as a main radiator.
Further, as shown in fig. 8, the antenna device 10 further includes a magnetic substrate 101. In one embodiment, the magnetic substrate 101 and the dielectric substrate 105 (see fig. 5) are disposed opposite to each other in the thickness direction of the antenna device 10. The magnetic substrate 101 is located on the opposite side of the dielectric substrate 105 toward the Z-axis. Among them, the magnetic substrate 101 may be a ferrite core.
Specifically, the orthographic projection of the magnetic substrate 101 on the plane of the antenna coil 102 covers at least part of the second conductor segment 124.
In one embodiment, as shown in fig. 8, the magnetic substrate 101 is substantially rectangular. An orthographic projection of the magnetic substrate 101 on the plane of the antenna coil 102 extends to the first conductor segment 122 and the second conductor segment 124 in the Y-axis direction. The plane on which the antenna coil 102 is located is a plane parallel to the XY plane. The projection of the first conductor segment 122 along the Z-axis is close to one end of the magnetic substrate 101. The projection of the second conductor segment 124 along the Z-axis is close to the opposite end of the magnetic substrate 101.
By providing the magnetic substrate 101, the magnetic substrate 101 can be used to support the first conductor segments 122 and the second conductor segments 124. In addition, the magnetic substrate 101 has a low magnetoresistance ratio, and can enhance the magnetic field generated by the first conductor segments 122 and the second conductor segments 124.
In another embodiment, as shown in fig. 9, the magnetic substrate 101 includes a first magnetic region 110 and a second magnetic region 112. First magnetic region 110 covers a portion of partially wrapped central portion 120 in an orthographic projection of the plane of antenna coil 102. The orthographic projection of the second magnetic region 112 on the plane of the antenna coil 102 is located on the side of the second conductor segment 124 facing away from the winding center 120. The projection of the second conductor segment 124 along the Z-axis is located between the first magnetic region 110 and the second magnetic region 112. The projection of the first conductor segment 122 along the Z-axis is located outside the magnetic substrate 101.
By providing the second magnetic regions 112, the magnetic field of the second conductor segments 124 on the side away from the winding center 120 can pass through the magnetic substrate 101 more, and the magnetic field intensity generated by the second conductor segments 124 is enhanced based on the characteristic of the magnetic resistance ratio of the magnetic substrate 101 being low. In addition, the first conductor segments 122 are far away from the magnetic substrate 112, and the magnetic field generated by the first conductor segments 122 passes through the magnetic substrate 101 less, thereby reducing the influence of the magnetic field generated by the first conductor segments 122 on the magnetic field generated by the second conductor segments 124.
Alternatively, as shown in fig. 10, the orthographic projection of the second magnetic region 112 on the plane of the antenna coil 102 may be greater than or equal to the orthographic projection of the first magnetic region 110 on the plane of the antenna coil 102. The orthographic projection of the second magnetic region 112 on the plane where the antenna coil 102 is located is larger than or equal to the orthographic projection of the first magnetic region 110 on the plane where the antenna coil 102 is located, and the fact that the area of the second magnetic region 112 on the XY plane is larger than or equal to the area of the first magnetic region 110 on the XY plane is shown.
By making the orthographic projection of the second magnetic region 112 on the plane of the antenna coil 102 larger than or equal to the orthographic projection of the first magnetic region 110 on the plane of the antenna coil 102, the magnetic field of the second conductor segment 124 far away from the winding center 120 can pass through the magnetic substrate 101, and the magnetic field intensity generated by the second conductor segment 124 is enhanced based on the characteristic of the magnetic resistance ratio of the magnetic substrate 101 being low.
It can be understood that, in the above embodiments, whether the orthographic projection of the magnetic substrate 101 on the plane where the antenna coil 102 is located covers the areas of the first conductor segment 122 and the second magnetic region 112 on the XY plane and the area of the first magnetic region 110 on the XY plane may be combined or separated according to actual requirements.
The following embodiments illustrate the structure and position of the conductive device 103, and it is understood that the structure and position of the conductive device 103 in the present application includes, but is not limited to, the following embodiments.
Alternatively, referring to fig. 10 and 11, the conductive element 103 is close to the first conductor segment 122 and is disposed opposite to the first conductor segment 122 in a direction pointing to the magnetic substrate 101 along the antenna coil 102. In other words, the conductive member 103 is disposed opposite to the first conductor segment 122 in the Z-axis direction.
The conductive element 103 and the first conductor segment 122 have opposite current flow directions, so that the magnetic field generated by the conductive element 103 on the magnetic substrate 101 is opposite to the magnetic field generated by the first conductor segment 122. Accordingly, the magnetic field generated by the conductive elements 103 on the magnetic substrate 101 cancels the magnetic field generated by the first conductor segments 122, further weakening the magnetic permeability of the magnetic substrate 101 to the first conductor segments 122, and increasing the magnetic field strength of the second conductor segments 124.
In one embodiment, referring to fig. 10 and 11, the conductive member 103 is located between the antenna coil 102 and the magnetic substrate 101. In other words, the antenna coil 102, the conductive member 103, and the magnetic substrate 101 are arranged in this order in the Z-axis direction. The current flow direction on the first conductor segment 122 is reversed along the X-axis. The current on conductor 103 flows in a forward direction along the X-axis. In other words, the current flow on the first conductor segment 122 is opposite to the current flow on the conductor 103. Thus, the magnetic field generated on the magnetic substrate 101 by the first conductor segments 122 is positive along the Y-axis. The magnetic field generated on the magnetic substrate 101 by the conductive member 103 is reversed along the Y-axis. Therefore, on the magnetic substrate 101, the magnetic field generated by the conductive elements 103 can cancel the magnetic field generated by the current on the first conductor segment 122, thereby reducing the cancellation effect of the current on the first conductor segment 122 on the magnetic field generated by the current on the second conductor segment 124. Further, on the magnetic substrate 101, the conductive member 103 may also enhance the magnetic field strength in the same direction as the magnetic field of the second conductor segment 124.
Of course, in other embodiments, the conductive member 103 may also be located on the side of the antenna coil 102 facing away from the magnetic substrate 101. In other words, the conductive member 103, the antenna coil 102, and the magnetic substrate 101 may be arranged in this order in the Z-axis direction. The current flowing in the conductive element 103 opposite to the current flowing in the first conductor segment 122 may cause the conductive element 103 and the first conductor segment 122 to generate a magnetic field on the magnetic substrate 101 in opposite directions.
Optionally, the orthographic projection of the conductive element 103 on the plane of the antenna coil 102 covers the first conductor segment 122. In other words, the projection of the conductor 103 on the magnetic substrate 112 at least partially overlaps the projection of the first conductor segment 122 on the magnetic substrate 101.
By making the projection of the conductive element 103 on the magnetic substrate 112 cover the projection of the first conductor segment 122 on the magnetic substrate 112, the cancellation effect of the magnetic field of the conductive element 103 on the magnetic field of the first conductor segment 122 can be ensured, and the reliability of the antenna device 10 can be improved.
Specifically, referring to fig. 10 and 11, the antenna coil 102 and the magnetic substrate 112 are disposed along the XY plane. The conductor 103 is disposed opposite the first conductor segment 122 along the Z-axis. The first conductor segments 122 are a plurality of conductive lines arranged side by side in the XY plane. The conductive member 103 is a conductive substrate having a larger width than the first conductive segment 122 along the Y-axis direction. It is understood that the area of the conductive member 103 is greater than or equal to the area of the first conductor segment 122 in the XY plane. Of course, in other embodiments, the area of the conductive member 103 may be smaller than the area of the first conductor segment 122. When the first conductor segment 122 includes one conductive wire, the area of the first conductor segment 122 refers to the cross-sectional area of the one conductive wire in the XY plane. When the first conductor segment 122 includes a plurality of conductive wires, the area of the first conductor segment 122 represents the sum of the cross-sectional areas of the plurality of conductive wires and the void areas between the plurality of conductive wires in the XY plane.
By disposing the conductive piece 103 and the first conductor segment 122 opposite to each other along the Z-axis, the magnetic fields generated by the conductive piece 103 and the first conductor segment 122 cancel each other on the magnetic substrate 112, and thus, the influence of the magnetic field of the first conductor segment 122 on the magnetic field of the second conductor segment 124 can be reduced on the magnetic substrate 101.
In another embodiment, referring to fig. 10 and 11, the orthogonal projection of the conductive member 103 on the plane of the antenna coil 102 is at least partially located at the winding center 120. In other words, the conductive member 103 extends in the direction opposite to the Z-axis. The area of the conductive member 103 in the XY plane is greater than or equal to the area of the first conductor segment 122 in the XY plane.
As shown in fig. 11, the antenna coil 102 and the conductive member 103 are disposed on the surface of the dielectric substrate 105. In one embodiment, the conductive member 103 is adhered to the surface of the dielectric substrate 105 facing the magnetic substrate 101 by means of adhesion. The antenna coil 102 is bonded to the surface of the dielectric substrate 105 facing the magnetic substrate 101 by means of bonding. This embodiment is simple and facilitates the manufacture of the antenna device 10.
In another embodiment, the conductive member 103 may be formed on the dielectric substrate 105. The conductive elements 103 may be formed on the dielectric substrate 105 by processes including, but not limited to, coating, etching, and imprinting techniques. In this embodiment, the size of the antenna device 10 in the thickness direction can be reduced. In addition, in this embodiment, the antenna coil 102 and the conductive member 103 can be manufactured through the same process flow, so that the uniformity of the antenna device 10 is improved, and the process steps of the antenna device 10 are reduced.
When the conductive member 103 and the antenna coil 102 are disposed on the dielectric substrate 105, as shown in fig. 12, the dielectric substrate 105 may include an insulating layer 152. Antenna coil 102 and conductive member 103 may be located on opposite sides of insulating layer 152, respectively. In other words, the antenna coil 102, the insulating layer 152, and the conductive member 103 are sequentially disposed on the dielectric substrate 105 in the Z-axis direction. Alternatively, the conductive member 103, the insulating layer 152, and the antenna coil 102 are sequentially provided on the dielectric substrate 105 in the Z-axis direction. By providing the insulating layer 114 in the dielectric substrate 105, the antenna coil 102 and the conductive member 103 can be prevented from interfering with each other.
Further, referring to fig. 12 and 13, the antenna device 10 may further include an electrical connector 106. The electrical connector 106 is disposed on the dielectric substrate 105. Electrical connection 106 is between antenna coil 102 and conductive member 103. Electrical connection 106 is used to connect antenna coil 102 and conductive member 103 such that antenna coil 102 is in series with conductive member 103 in the same circuit. The electrical connection 106 is disposed on the dielectric substrate 105 by a method including, but not limited to, coating, etching, and stamping.
Specifically, referring to fig. 12 and 13, the electrical connectors 106 include a first electrical connector 106a and a second electrical connector 106 b. The first electrical connection member 106a electrically connects the conductive member 103 and the feeding end of the antenna coil 102. The second electrical connection member 106a is for electrically connecting the first conductor segment 122 and the conductive member 103.
By providing electrical connection 106, connecting antenna coil 102 in series with conductive member 103, circuitry in antenna assembly 10 may be reduced. In addition, when the antenna coil 102 is connected in series with the conductive element 103, the currents on the antenna coil 102 and the conductive element 103 can be the same, so that waste caused by excessive current on the conductive element 103 is avoided, or the magnetic field of the first conductor segment 122 is less counteracted when the current on the conductive element 103 is too small.
Optionally, referring to fig. 12 and 13, the antenna coil 102 further includes a first feeding portion 121 and a second feeding portion 123. The first and second feeding portions 121 and 123 are located in the same plane as the first and second conductor segments 122 and 124. The first feeding unit 121, the conductive member 103, the antenna coil 102, and the second feeding unit 123 are connected in series in this order. Specifically, one end of the first feeding portion 121 is electrically connected to the first electrical connecting piece 106a, one end of the first electrical connecting piece 106a facing away from the first feeding portion 121 is connected to the conductive piece 103, one end of the conductive piece 103 facing away from the first electrical connecting piece 106a is electrically connected to the second electrical connecting piece 106b, one end of the second electrical connecting piece 106b facing away from the conductive piece 103 is electrically connected to the first conductor segment 122, and one end of the first conductor segment 122 facing away from the second electrical connecting piece 106b is electrically connected to the second feeding portion 123. Thus, the first feeding portion 121, the first electrical connection member 106a, the conductive member 103, the second electrical connection member 106b, the antenna coil 102, and the second feeding portion 123 form a conductive loop.
In one embodiment, referring to fig. 12 and 13, a first connection hole (not shown) and a second connection hole (not shown) are formed on the dielectric substrate 105. The first and second connection holes are through holes on the insulating layer 152 of the dielectric substrate 105. The first and second connection holes are for receiving the first and second electrical connectors 106a and 106 b.
Further, as shown in fig. 14, the antenna device 10 further includes a shield 104. Wherein the shield 104 refers to a medium having a different magnetic permeability from air. When the magnetic field of the first conductor segment 122 passes through the air to the shield 104, the shield 104 causes the magnitude and direction of the magnetic field of the first conductor segment 122 to change, thereby forming a magnetic shield. Alternatively, the shielding element 104 is a metal shielding element 104, and when the current on the first conductor segment 122 changes, the metal shielding element 104 cuts the magnetic induction lines in the magnetic field to generate the induced current and the induced magnetic field, so as to counteract the change of the magnetic field generated by the current on the first conductor segment 122.
Specifically, the shielding element 104 is located between the conductive element 103 and the first conductor segment 122, or the shielding element 104 is located between the conductive element 103 and the magnetic substrate 101.
In one embodiment, the shielding element 104 is located between the conductive element 103 and the magnetic substrate 101. The shield 104 is provided on a dielectric substrate 105. The shielding element 104 may be disposed on the dielectric substrate 105 by coating, etching, or stamping, and is located between the conductive element 103 and the first conductor segment 122. That is, the antenna device 10 includes the first conductor segment 122, the conductor 103, the shield 104, and the magnetic substrate 101 in this order in the Z-axis direction.
In another embodiment, the shield 104 is located between the conductor 103 and the first conductor segment 122. That is, the antenna device 10 includes the first conductor segment 122, the shield 104, the conductor 103, and the magnetic substrate 101 in this order in the Z-axis direction.
Of course, in other embodiments, the shielding element 104 may be located on the same layer of the dielectric substrate 105 as the conductive element 103, and the shielding element 104 and the conductive element 103 may be filled with an insulating material therebetween. In other words, shield 104 is flush with conductor 103 in the direction along the Z-axis.
By providing the shield 104 to shield the magnetic field of the first conductor segments 122, the magnetic field strength of the first conductor segments 122 on the magnetic substrate 101 is further reduced, and the cancellation of the magnetic field generated by the current flowing on the second conductor segments 124 by the first conductor segments 122 is reduced, thereby enhancing the magnetic field strength around the second conductor segments 124.
The foregoing is a partial description of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.
Claims (17)
1. An antenna device, comprising:
a dielectric substrate;
the antenna coil is arranged on the dielectric substrate and comprises a winding central part, and at least one first conductor section and at least one second conductor section which are arranged on two opposite sides of the winding central part, wherein the first conductor section is connected with the second conductor section in series; and
the conductive piece is arranged on the dielectric substrate, the conductive piece is arranged opposite to the antenna coil, and the orthographic projection of the conductive piece on the dielectric substrate covers at least part of the orthographic projection of the first conductor section on the dielectric substrate; the conductive member is electrically connected to the first conductor segment, and a magnetic field generated by the conductive member is used for canceling the magnetic field generated by the first conductor segment.
2. The antenna device according to claim 1, further comprising a magnetic substrate disposed opposite to the dielectric substrate, wherein an orthographic projection of the magnetic substrate on a plane of the antenna coil covers at least a portion of the second conductor segment, and wherein a direction of a magnetic field generated by the conductive element on the magnetic substrate is opposite to a direction of a magnetic field generated by the first conductor segment on the magnetic substrate.
3. The antenna device according to claim 2, wherein the magnetic substrate comprises a first magnetic region, a second magnetic region and a third magnetic region connected to each other, the third magnetic region is located between the first magnetic region and the second magnetic region, and an orthographic projection of the third magnetic region on a plane of the antenna coil covers the second conductor segment; the orthographic projection of the first magnetic area on the plane of the antenna coil covers at least part of the winding center part; the orthographic projection of the second magnetic area on the plane of the antenna coil is positioned on one side, away from the winding center, of the second conductor segment.
4. The antenna device as claimed in claim 3, wherein an orthographic projection of the first magnetic region onto the plane of the antenna coil also covers at least part of the first conductor segment.
5. The antenna device of claim 4, wherein the area of the second magnetic region is greater than or equal to the area of the first magnetic region.
6. The antenna device according to any one of claims 2 to 5, wherein the antenna coil further comprises a first feeding portion and a second feeding portion, the first feeding portion and the second feeding portion are provided on a side of the first conductor segment away from the winding center portion, and the first feeding portion, the conductive member, the first conductor segment, the second conductor segment, and the second feeding portion are connected in series in this order.
7. The antenna device as claimed in claim 6, wherein the dielectric substrate includes an insulating layer disposed therein, and the antenna coil and the conductive member are disposed on opposite sides of the insulating layer.
8. The antenna device of claim 7, further comprising at least two electrical connections, wherein the dielectric substrate further comprises at least two conductive vias through the insulating layer, wherein the electrical connections are located in the conductive vias, wherein at least one of the electrical connections is configured to electrically connect the conductive element with the first feed, and wherein at least one of the electrical connections is configured to electrically connect the conductive element with the first conductor segment.
9. The antenna device of claim 6, wherein a current flow direction on the first conductor segment is opposite a current flow direction on the conductive element such that a magnetic field generated by a current on the conductive element at least partially cancels a magnetic field generated by a current on the first conductor segment on the magnetic substrate.
10. The antenna device according to any of claims 2 to 5, wherein the plane of the magnetic substrate is parallel to the plane of the antenna coil, and the conductive member is located on a side of the antenna coil facing the magnetic substrate.
11. The antenna device according to any of claims 1 to 5, characterized in that an orthographic projection of said conductive element on a plane of said antenna coil covers said first conductor segment.
12. The antenna device according to claim 11, wherein the antenna coil comprises a plurality of the first conductor segments, and wherein an orthographic projection of the conductive element on a plane of the antenna coil covers the plurality of the first conductor segments.
13. The antenna device according to any of claims 1 to 5, wherein an orthographic projection of the conductive member on a plane on which the antenna coil is located covers at least a part of the winding center portion.
14. The antenna device according to any of claims 1 to 5, characterized in that the width of the first conductor segment is smaller than the width of the second conductor segment in a direction along the first conductor segment towards the second conductor segment.
15. The antenna device according to any of claims 1 to 5, further comprising a shield disposed on the dielectric substrate, the shield configured to shield at least a portion of the magnetic field generated by the first conductor segment.
16. An electronic device, characterized in that the electronic device comprises a camera module and an antenna arrangement according to any one of claims 1 to 15, the antenna arrangement being arranged around the camera module or opposite the camera module.
17. The electronic device of claim 16, wherein the antenna assembly encloses at least two adjacent sides of the camera module.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020641216.7U CN211605406U (en) | 2020-04-24 | 2020-04-24 | Antenna device and electronic apparatus |
| EP21791747.5A EP4142049A4 (en) | 2020-04-24 | 2021-02-08 | Antenna apparatus and electronic device |
| PCT/CN2021/076016 WO2021212975A1 (en) | 2020-04-24 | 2021-02-08 | Antenna apparatus and electronic device |
| US17/972,066 US20230040011A1 (en) | 2020-04-24 | 2022-10-24 | Antenna Apparatus and Electronic Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020641216.7U CN211605406U (en) | 2020-04-24 | 2020-04-24 | Antenna device and electronic apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN211605406U true CN211605406U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020641216.7U Active CN211605406U (en) | 2020-04-24 | 2020-04-24 | Antenna device and electronic apparatus |
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| Country | Link |
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| CN (1) | CN211605406U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342228A (en) * | 2020-04-24 | 2020-06-26 | Oppo广东移动通信有限公司 | Antenna device and electronic apparatus |
| WO2021212975A1 (en) * | 2020-04-24 | 2021-10-28 | Oppo广东移动通信有限公司 | Antenna apparatus and electronic device |
| WO2022083247A1 (en) * | 2020-10-19 | 2022-04-28 | Oppo广东移动通信有限公司 | Radio device and electronic device |
| CN115102581A (en) * | 2022-06-21 | 2022-09-23 | 维沃移动通信有限公司 | Electronic device |
| CN116417799A (en) * | 2021-12-31 | 2023-07-11 | Oppo广东移动通信有限公司 | Antenna assembly and electronic equipment |
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2020
- 2020-04-24 CN CN202020641216.7U patent/CN211605406U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342228A (en) * | 2020-04-24 | 2020-06-26 | Oppo广东移动通信有限公司 | Antenna device and electronic apparatus |
| WO2021212975A1 (en) * | 2020-04-24 | 2021-10-28 | Oppo广东移动通信有限公司 | Antenna apparatus and electronic device |
| WO2022083247A1 (en) * | 2020-10-19 | 2022-04-28 | Oppo广东移动通信有限公司 | Radio device and electronic device |
| EP4203184A4 (en) * | 2020-10-19 | 2024-03-20 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Radio device and electronic device |
| CN116417799A (en) * | 2021-12-31 | 2023-07-11 | Oppo广东移动通信有限公司 | Antenna assembly and electronic equipment |
| CN116417799B (en) * | 2021-12-31 | 2024-05-17 | Oppo广东移动通信有限公司 | Antenna assembly and electronic equipment |
| CN115102581A (en) * | 2022-06-21 | 2022-09-23 | 维沃移动通信有限公司 | Electronic device |
| CN115102581B (en) * | 2022-06-21 | 2024-05-14 | 维沃移动通信有限公司 | Electronic equipment |
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