Antenna device and electronic device

Abstract

The application discloses an antenna device and an electronic device, and belongs to the technical field of communication. The antenna device comprises an antenna, which is arranged around a reel of an electronic device, and each winding coil formed by the antenna on the reel is not parallel to the radial direction of the reel. The electronic device is an electronic device with a reel screen, and at least one end of the antenna is fixedly arranged on the reel screen of the electronic device. During the switching of the reel screen between the expanded state and the contracted state, the number of turns of the antenna on the reel changes.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to an antenna device and an electronic device. BACKGROUND

[0002] With the development of electronic technology, the screen form of electronic devices such as mobile phones is constantly changing, from the traditional flip screen to the smart straight screen, the curved screen, and the current popular folding screen and scroll screen. Among them, the scroll screen realizes a larger screen through a scroll structure. With the change of the screen structure, the layout of the antenna in the device will be affected to a certain extent, for example, the antenna layout is crowded, the clearance is poor, the wiring area is reduced, and the performance of the antenna is degraded. At present, the antenna in the scroll screen electronic device is usually arranged around the electronic device, but the transmission device and the screen rolling of the scroll screen occupy a large area, so that the antenna layout space becomes smaller, affecting the performance of the antenna. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide an antenna device and an electronic device, which can solve the problem of the influence of the small antenna layout space on the performance of the antenna in the existing scroll screen electronic device.

[0004] In a first aspect, the embodiments of the present application provide an antenna device, comprising: an antenna, the antenna is arranged around a scroll of an electronic device, and each winding coil formed by the antenna on the scroll is not parallel to the radial direction of the scroll, the electronic device is an electronic device with a scroll screen, and at least one end of the antenna is fixedly arranged on the scroll screen of the electronic device.

[0005] In the process of switching the scroll screen between the expanded state and the contracted state, the number of turns of the antenna on the scroll changes.

[0006] In a second aspect, the embodiments of the present application provide an electronic device, comprising a scroll screen and the antenna device of the first aspect.

[0007] In the embodiments of the present application, the antenna device comprises an antenna, the antenna is arranged around a scroll of an electronic device, and each winding coil formed by the antenna on the scroll is not parallel to the radial direction of the scroll, the electronic device is an electronic device with a scroll screen, and at least one end of the antenna is fixedly arranged on the scroll screen of the electronic device. In the process of switching the scroll screen between the expanded state and the contracted state, the number of turns of the antenna on the scroll changes. In this way, by multiplexing the scroll of the scroll screen electronic device, the antenna is arranged on the scroll, the layout area of the antenna can be improved, the performance of the antenna is improved, and by changing the number of turns of the antenna, the gain of the antenna is improved, and the performance of the antenna is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1a is a schematic diagram of an expanded state of a scroll screen electronic device provided by an embodiment of the present application;

[0009] Figure 1b is a schematic diagram of a contracted state of a scroll screen electronic device provided by an embodiment of the present application;

[0010] Figure 1c is a schematic diagram of a cross-sectional view of a scroll screen electronic device provided by an embodiment of the present application;

[0011] Figure 2 is a schematic diagram of a structure of an antenna device provided by an embodiment of the present application;

[0012] Figure 3a is a schematic diagram of a state of an antenna device in a contracted state of a scroll screen provided by an embodiment of the present application;

[0013] Figure 3b is a schematic diagram of a state of an antenna device in an expanded state of a scroll screen provided by an embodiment of the present application;

[0014] Figure 4 is a schematic diagram of electromagnetic radiation of a conventional electronic device to a human body provided by an embodiment of the present application;

[0015] Figure 5 is a schematic diagram of a structure of an antenna device provided by an embodiment of the present application;

[0016] Figure 6a is a schematic diagram of a right-handed state of a scroll screen electronic device provided by an embodiment of the present application;

[0017] Figure 6b is a schematic diagram of a left-handed state of a scroll screen electronic device provided by an embodiment of the present application;

[0018] Figure 7 is a schematic diagram of a cross-sectional structure of an antenna device provided by an embodiment of the present application;

[0019] Figure 8 is a schematic diagram of current and magnetic field distribution of an antenna device provided by an embodiment of the present application;

[0020] Figure 9 is a schematic diagram of a cross-sectional structure of an antenna device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the objects before and after are in a "or" relationship.

[0023] The antenna device provided by the embodiments of the present application will be described in detail below in combination with the drawings, specific embodiments and application scenarios.

[0024] Please refer to Figure 2 , Figure 2 The structural diagram of the antenna device provided by the embodiments of the present application is shown in Figure 2 , which comprises an antenna 21, the antenna 21 is arranged around a reel 22 of an electronic device 20, and each winding coil formed by the antenna 21 on the reel 22 is not parallel to the radial direction of the reel 22, the electronic device 20 is an electronic device with a reel screen, and at least one end of the antenna 21 is fixedly arranged on the reel screen 23 of the electronic device 20;

[0025] During the switching of the reel screen 23 between the expanded state and the contracted state, the number of turns of the antenna 21 on the reel 22 changes.

[0026] The antenna device in the embodiments of the present application can be arranged in a reel screen electronic device to improve the antenna performance of the reel screen electronic device.

[0027] The structure of the reel screen electronic device can be as shown in Figures 1a to 1c , the reel screen electronic device 20 comprises a reel 22 and a reel screen 23, one end of the reel screen 23 is connected with the reel 22, and the reel screen 23 can be switched between an expanded state 201 and a contracted state 202 by rotating the reel 22 in different directions. Figure 1a and Figure 1b As shown, the reel screen 23 can work in the expanded state 201 or the contracted state 202.

[0028] As shown in Figure 2 , the present application provides an antenna device, which arranges the antenna by multiplexing the sliding reel structure of the reel screen electronic device 20, that is, increases the metal coil on the surface of the reel 22 as the antenna, so as to improve the layout area of the antenna in the limited space and improve the antenna performance.

[0029] Specifically, as shown in Figure 2 , the antenna device comprises an antenna 21 and a reel 22, the antenna 21 is arranged around the reel 22, and the antenna 21 is arranged on the reel 22 in a plurality of winding coils, the winding coils are not parallel to the radial direction of the reel 22, and at least one end of the antenna 21 is fixedly arranged on the reel screen 23 of the electronic device 20.As shown, the antenna device in this embodiment includes an antenna 21. The antenna 21 is arranged around the scroll 22 of the scroll screen electronic device 20 at a certain tilt angle to form a spiral antenna. At least one end of the antenna 21 is fixedly arranged on the scroll screen 23. That is, the wiring at both ends of the antenna 21 can be fixedly arranged on the scroll screen 23. Alternatively, one end of the antenna 21 can be fixedly arranged on the scroll screen 23, and the other end can be arranged on the scroll 22.

[0030] Since at least one end of the antenna 21 is fixedly mounted on the scroll screen 23, the number of turns of the antenna 21 on the scroll 22 can change as the scroll screen 23 unfolds or retracts. Specifically, as the scroll 22 is rolled inward, the number of turns of the antenna 21 on the scroll 22, i.e., the number of winding coils, gradually increases; while as the scroll 22 is rolled outward, the antenna length of the antenna 21 outside the scroll 22 increases, and correspondingly, the number of turns of the antenna 21 on the scroll 22, i.e., the number of winding coils, gradually decreases.

[0031] like Figure 3a As shown, when the scroll screen 23 is in the retracted state, the number of turns of the antenna 21 on the scroll 22 is N1, and the antenna length of the antenna 21 outside the scroll 22 is L1, as follows. Figure 3b As shown, when the scroll screen 23 is in the unfolded state, the number of turns of the antenna 21 on the scroll 22 is N2, and the antenna length of the antenna 21 outside the scroll 22 is L2, where N1>N2 and L2>N1.

[0032] In this way, by utilizing the two operating states of the scroll screen 23, the number of axial turns of the antenna 21 on the scroll 22 can be varied, thereby improving the antenna gain. This is based on the formula G, which relates antenna gain to the number of antenna turns. dBi =10·log 10 (3.45N), it can be observed that since N1>N2, the gain G1 of antenna 21 in the contracted state is greater than the gain G2 of antenna 21 in the deployed state, where G... dBi Here, N represents the antenna gain, and N represents the number of antenna turns. Therefore, in this embodiment, by reasonably designing the number of antenna turns, the antenna gain can be improved, achieving a larger coverage area and enhancing the user experience at the same power.

[0033] Optionally, in the retracted state, the number of turns of antenna 21 on spool 22 matches the required antenna gain.

[0034] In one embodiment, the number of turns of the antenna 21 on the scroll 22 in the retracted state of the scroll screen 23 can be set based on the actual required antenna gain, so that the number of antenna turns in the retracted state matches the required antenna gain, ensuring that the antenna 21 can meet the actual usage requirements.

[0035] Optionally, in the retracted state, a portion of the antenna 21 is located on the reel 22 and another portion of the antenna 21 is located on the reel screen 23, wherein the portion of the antenna 21 located on the reel screen 23 is used for adjusting impedance.

[0036] That is, in one embodiment, considering that the portion of the antenna 21 located on the reel screen 23 has less contribution to the antenna device in the retracted state of the reel screen 23, this portion of the antenna 21 can be used for adjusting impedance. Specifically, the length of the portion of the antenna 21 located on the reel screen 23 can be set according to actual needs so that the impedance meets the needs.

[0037] Optionally, the circumference of the antenna 21 wound on the reel 22 is greater than and less than wherein λ is the working wavelength of the antenna 21.

[0038] The circumference of the antenna 21 wound on the reel 22 refers to the length of a single coil of the antenna 21 on the reel 22.

[0039] In this embodiment, the winding spacing of the antenna 21 on the reel 22 is set reasonably so that the circumference of the antenna 21 wound on the reel 22 is greater than and less than This can ensure that the antenna 21 works in an axial mode, that is, the main radiation direction of the antenna 21 is along the direction of one end of the reel 22. λ is the working wavelength of the antenna 21 and can be determined according to the working frequency of the antenna 21.

[0040] Specifically, as shown in Figure 2 the key parameters of the antenna 21 include the X-axis length A of the antenna, the diameter D of a single coil, the circumference C of a single coil, the spacing S between two adjacent coils, and the total number N of winding coils. When the antenna 21 is laid out, these key parameters can be adjusted according to the required working frequency and antenna performance to make the antenna 21 work at the required frequency and have better antenna performance.

[0041] In the related art, as the frequency bands contained by electronic devices increase, the antenna layout becomes more and more compact in a limited space, which sharply increases the electromagnetic wave radiation of the electronic devices to the human body in different use scenarios. As shown in Figure 4 the electromagnetic radiation 41 generated by the electronic device 40 is directed in various directions, which increases the electromagnetic wave absorption of the human body 42.

[0042] In this embodiment, the antenna 21 works in an axial mode, as shown in Figure 2 the radiation pattern 203 of the antenna 21 is concentrated in the X-axis direction, so that compared with the prior art, the radiation toward the human body can be reduced and the electromagnetic wave absorption of the human body can be reduced.

[0043] Optionally, the winding manner of the antenna 21 is a target manner, and the feeding end of the antenna 21 is a target end, so that the radiation direction of the antenna 21 points to a target direction, wherein the winding manner includes clockwise winding or counterclockwise winding, and the target direction is a direction from one end of the reel 22 to the other end of the reel 22.

[0044] That is, in one embodiment, the winding direction and the feeding end of the antenna 21 can be reasonably set according to the actual required antenna radiation direction, so as to ensure that the radiation direction of the antenna 21 points to a target direction, and the target direction can be a direction from one end of the reel 22 to the other end of the reel 22, for example, can be a +X axis direction as shown in FIG. 4, which can generally ensure the best antenna radiation performance. Specifically, the winding manner of the antenna 21 can be designed as counterclockwise winding, and the end of the antenna 21 close to the bottom end of the reel screen 23 is designed as the feeding end, or the winding manner of the antenna 21 can be designed as clockwise winding, and the end of the antenna 21 close to the top end of the reel screen 23 is designed as the feeding end, so that the radiation direction of the antenna 21 is concentrated in the +X axis direction as shown in FIG. 4. Figure 2 Figure 2

[0045] In this way, it can be ensured that the radiation direction of the antenna 21 points more to the base station when the electronic device is normally used, and the performance of the antenna 21 is ensured.

[0046] In the embodiment of the present application, when the antenna 21 is a complete winding coil, the antenna 21 includes two ends, and at least one end of the antenna 21 is fixedly arranged in the reel screen 23 of the electronic device 20, that is, both ends of the antenna 21 can be fixedly arranged in the reel screen 23, or one end of the antenna 21 is fixedly arranged in the reel screen 23, and the other end is arranged on the reel 22.

[0047] The antenna 21 can also be composed of a plurality of sub-antennas. Optionally, as shown in FIG. 5, the antenna 21 includes a first sub-antenna 211 and a second sub-antenna 212. Figure 5

[0048] During the switching of the reel screen 23 between the expanded state and the contracted state, the number of turns of at least one of the first sub-antenna 211 and the second sub-antenna 212 on the reel 22 changes.

[0049] ​​​In one embodiment, the antenna 21 can be a dual-antenna system composed of two parts, i.e., the upper and lower two parts of the antenna can be arranged on the reel 22 respectively, and the radiation directions of the first sub-antenna 211 and the second sub-antenna 212 can be the same or different. In this embodiment, the first sub-antenna 211 and the second sub-antenna 212 each include two ends, and one end of at least one of the first sub-antenna 211 and the second sub-antenna 212 is fixedly arranged in the reel screen 23, so that the number of turns of at least one of the first sub-antenna 211 and the second sub-antenna 212 on the reel 22 can change with the contraction or expansion of the reel screen 23. For example, one end or both ends of the first sub-antenna 211 are fixed in the reel screen 23, so that the number of turns of the first sub-antenna 211 on the reel 22 can change with the contraction or expansion of the reel screen 23, and / or one end or both ends of the second sub-antenna 212 are fixed in the reel screen 23, so that the number of turns of the second sub-antenna 212 on the reel 22 can change with the contraction or expansion of the reel screen 23.

[0050] In this way, by adjusting the parameters of each sub-antenna separately, the antenna 21 can have more combined working modes, thereby being able to meet more use scenario requirements.

[0051] Optionally, as shown in Figure 5 the antenna device further includes a switching switch 24;

[0052] The first end of the first sub-antenna 211 and the first end of the second sub-antenna 212 are connected to two moving ends of the switching switch 24 respectively, and the second end of the first sub-antenna 211 and the second end of the second sub-antenna 212 are fixed in the reel screen 23 of the electronic device 20;

[0053] The radiation directions of the first sub-antenna 211 and the second sub-antenna 212 are opposite.

[0054] That is, in one embodiment, on the basis of the previous embodiment, a switching switch 24 can be introduced, which can be a single-pole double-throw switch or a double-pole double-throw switch, for controlling the working state of the first sub-antenna 211 and the second sub-antenna 212, so that one of them is in the working mode, or both are in the working mode.

[0055] And in this embodiment, the radiation directions of the first sub-antenna 211 and the second sub-antenna 212 are opposite, for example, as shown in Figure 5 the radiation direction of one of the sub-antennas is +X-axis direction, and the radiation direction of the other sub-antenna is -X-axis direction, so that the radiation direction of the antenna 21 can cover the positive and negative directions of the X-axis, thereby in actual use, the sub-antenna can be switched according to the use requirement to adjust the radiation direction of the antenna, and the antenna requirement in different use scenarios can be flexibly met.

[0056] Optionally, the radiation direction of the first sub-antenna 211 points to the first direction, and the radiation direction of the second sub-antenna 212 points to the second direction;

[0057] When the electronic device 20 is in the upright grip position, the switch 24 is connected to the first sub-antenna 211;

[0058] When the electronic device 20 is in the reverse grip state, the switch 24 is connected to the second sub-antenna 212.

[0059] In one embodiment, the first sub-antenna 211 and the second sub-antenna 212 have opposite radiation directions. The first sub-antenna 211 radiates in a first direction, and the second sub-antenna 212 radiates in a second direction. The first direction can be from the bottom of the scroll screen 23 to the top of the scroll screen 23, and the second direction is opposite to the first direction, i.e., from the top of the scroll screen 23 to the bottom of the scroll screen 23. Figure 5 As shown, the radiation pattern 2031 of the first sub-antenna 211 can be along the +X axis, and the radiation pattern 2032 of the second sub-antenna 212 can be along the -X axis, that is, the radiation directions of the first sub-antenna 211 and the second sub-antenna 212 are exactly opposite.

[0060] In this embodiment, the corresponding antenna can be switched to work according to different usage scenarios of the electronic device 20, so as to ensure that the antenna can have good performance in different usage scenarios.

[0061] Specifically, considering that users may hold electronic devices in either a forward or reverse grip, and such... Figure 2 In the single antenna scheme shown, the radiation direction of antenna 21 differs between the normal and reverse grip scenarios, as follows: Figure 6a In the case of a normal grip, the radiation pattern 203 of antenna 21 points towards the +X axis, as shown below. Figure 6b As shown, in the reverse grip scenario, the radiation pattern 203 of antenna 21 points towards the -X axis, meaning the radiation direction of antenna 21 is more towards the ground. This reduces the energy received from the base station or other electronic devices, resulting in a worse internet experience for the user. Therefore, in this embodiment, the switching switch 24 can be connected to either the first sub-antenna 211 or the second sub-antenna 212 when the electronic device 20 is in either a normal or reverse grip state, ensuring that it is always switched to the sub-antenna pointing towards the +X axis.

[0062] Thus, in this embodiment, by setting two sub-antennas with opposite radiation directions, and by switching the switch 24 to the sub-antenna with better performance according to whether the electronic device 20 is held upright or backward, the user's Internet speed is improved and the user experience is enhanced.

[0063] Optionally, such as Figure 7As shown, the space between the spool 22 and the antenna 21 is filled with a dielectric 25.

[0064] In another embodiment, a medium 25 can be filled between the antenna 21 and the spool 22 at the axis of the antenna 21. The medium 25 can be a material that is approximately non-conductive to reduce the operating wavelength of the antenna 21. This allows the operating frequency of the antenna 21 to be adjusted under the same antenna physical size, or the antenna length to be reduced under the same operating frequency.

[0065] It should be noted that this implementation method is not only applicable to... Figure 2 The single-antenna system of the embodiment shown is also applicable to Figure 5 The dual-antenna system shown in the embodiment.

[0066] Optionally, such as Figure 9 As shown, magnetic material 26 is filled between the spool 22 and the medium 25.

[0067] like Figure 8 As shown, the antenna current distribution after filling the space between the spool 22 and the antenna 21 with dielectric 25 is along the tangent direction around the circumference. Assuming the dielectric 25 is an ideal dielectric, the direction of the magnetic field 204 of the current I is in the -X-axis direction. It should be noted that the direction of the magnetic field 204 of the current I is related to the direction of the current I. Figure 8 In the opposite direction shown, the magnetic field 204 of current I is in the +X axis direction. Based on the above analysis, in this embodiment, to enhance the axial magnetic field distribution, a magnetically conductive material can be added in the axial direction, as shown... Figure 9 As shown, a magnetically conductive material 26 is filled between the spool 22 and the medium 25.

[0068] Thus, in this embodiment, by further filling the space between the spool 22 and the medium 25 with a magnetically conductive material 26, the axial magnetic field distribution can be enhanced, thereby increasing the gain of the antenna 21 and optimizing the overall antenna performance.

[0069] It should be noted that this implementation method is not only applicable to... Figure 2 The single-antenna system of the embodiment shown is also applicable to Figure 5 The dual-antenna system shown in the embodiment.

[0070] The antenna device in the embodiments of the present application comprises an antenna, which is arranged around a reel of an electronic device, and each winding coil formed by the antenna on the reel is not parallel to the radial direction of the reel, the electronic device is an electronic device with a reel screen, and at least one end of the antenna is fixedly arranged on the reel screen of the electronic device; during switching of the reel screen between an expanded state and a contracted state, the number of turns of the antenna on the reel changes. In this way, by multiplexing the reel of the reel screen electronic device, the antenna is arranged on the reel, the layout area of the antenna can be improved, the performance of the antenna is improved, and by changing the number of turns of the antenna, the antenna gain is improved, and the performance of the antenna is further improved.

[0071] The embodiments of the electronic device can refer to the related description in the foregoing embodiments, and the same technical effects can be achieved as the foregoing antenna device embodiments. To avoid repetition, details are not described herein again.

[0072] The embodiments of the electronic device can refer to the related description in the foregoing embodiments, and the same technical effects can be achieved as the foregoing antenna device embodiments. To avoid repetition, details are not described herein again.

[0073] It should be noted that in this document, the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles, or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or further include elements inherent to such processes, methods, articles, or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, article, or device comprising the element.

[0074] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative, but not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. An antenna device, characterized by The antenna is arranged around a reel of the electronic device, and each winding coil formed by the antenna on the reel is not parallel to a radial direction of the reel, the electronic device is an electronic device with a reel screen, and at least one end of the antenna is fixedly arranged on the reel screen of the electronic device; During switching of the reel screen between the expanded state and the contracted state, the number of turns of the antenna on the reel changes; The antenna comprises a first sub-antenna and a second sub-antenna; During switching of the reel screen between the expanded state and the contracted state, the number of turns of at least one of the first sub-antenna and the second sub-antenna on the reel changes; The antenna device further comprises a switching switch; The first end of the first sub-antenna and the first end of the second sub-antenna are respectively connected to two moving ends of the switching switch, and the second end of the first sub-antenna and the second end of the second sub-antenna are both fixed on the reel screen of the electronic device; The radiation directions of the first sub-antenna and the second sub-antenna are opposite to each other; The radiation direction of the first sub-antenna points to a first direction, and the radiation direction of the second sub-antenna points to a second direction; When the electronic device is in a normal holding state, the switching switch is in communication with the first sub-antenna; When the electronic device is in a reverse holding state, the switching switch is in communication with the second sub-antenna.

2. The antenna device of claim 1, wherein The circumference of one turn of the antenna around the spool is greater than and less than wherein is the operating wavelength of the antenna.

3. The antenna device of claim 1, wherein The winding mode of the antenna is a target mode, and the feeding end of the antenna is a target end, so that the radiation direction of the antenna points to a target direction, wherein the winding mode comprises clockwise winding or counterclockwise winding, and the target direction is a direction from one end of the reel to the other end of the reel.

4. The antenna device of claim 1, wherein The reel and the antenna are filled with a medium.

5. The antenna device of claim 4, wherein, The reel and the medium are filled with a magnetic conductive material.

6. The antenna device of claim 1, wherein, In the contracted state, part of the antenna is located on the reel, and another part of the antenna is located on the reel screen.

7. An electronic device, comprising: The antenna device comprises a reel screen and any one of claims 1 to 6. The antenna is arranged around a reel of the electronic device, and each winding coil formed by the antenna on the reel is not parallel to a radial direction of the reel, the electronic device is an electronic device with a reel screen, and at least one end of the antenna is fixedly arranged on the reel screen of the electronic device;

Images