Antenna structure and electronic equipment

Abstract

The invention relates to an antenna structure and electronic equipment. The antenna structure comprises a conductive cavity, and the conductive cavity forms a cavity antenna with an opening. And the conductive part is arranged corresponding to the position of the opening and is coupled with the cavity antenna. And a gap is formed between the conductive piece and the opening. Thus, through the antenna mode of arranging the conductive part, the conductive part is coupled with the cavity antenna, the frequency of the antenna can be reduced, windowing does not need to be carried out in an antenna area, the size of the cavity antenna can be reduced, the frequency of the cavity antenna can be reduced, good low-frequency antenna radiation is achieved, and the identification function of interconnection and intercommunication is achieved; the layout is convenient; and the aesthetic property can be ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of antenna design, and in particular to an antenna structure and electronic equipment. Background Art

[0002] With the continuous development of communication technology, mobile phones and other electronic devices have evolved from carrying simple functions to supporting rich media such as voice, data, music, and video, and can be expanded to install a variety of application APPs to meet people's various needs. At the same time, the manufacturing process is constantly improving, and consumers are paying more and more attention to the appearance and cost of mobile phones, tablets and other products, and they are constantly developing in the direction of miniaturization, intelligence, lightness, and narrow bezels.

[0003] For example, the current tablet and mobile phone interconnection usually uses Bluetooth for matching connection and then realizes data interaction. This method requires the use of Bluetooth for complex operations, is not convenient enough, and is easily affected by other Bluetooth antennas around, affecting the user experience. Moreover, when the back cover of the tablet is all metal, the performance of ordinary Bluetooth antennas will decay rapidly and cannot meet the performance requirements. Summary of the invention

[0004] The present disclosure provides an antenna structure and an electronic device to solve the deficiencies in the related art.

[0005] In a first aspect, an embodiment of the present disclosure provides an antenna structure, including:

[0006] A conductive cavity, wherein the conductive cavity forms a cavity antenna having an opening;

[0007] A conductive member is arranged corresponding to the position of the opening and coupled with the cavity antenna; and a gap is provided between the conductive member and the opening.

[0008] Optionally, the conductive cavity has an opening, and the conductive member is in a long strip shape; or

[0009] The conductive cavity has a first opening and a second opening adjacent to each other, the conductive member includes a first conductive portion and a second conductive portion bent and connected to the first conductive portion, the first conductive portion is arranged corresponding to the first opening, and the second conductive portion is arranged corresponding to the second opening; the gap is provided between the first conductive portion and the first opening, and between the second conductive portion and the second opening; or

[0010] The conductive cavity has at least two openings, the conductive member includes at least two conductive parts corresponding to the number of the openings, each conductive part is arranged corresponding to one of the openings; and there is a gap between each conductive part and the corresponding opening.

[0011] Optionally, a gap distance between the first conductive portion and the first opening is equal to a gap distance between the second conductive portion and the second opening; or

[0012] The gap distance between each of the conductive parts and the corresponding opening is equal.

[0013] Optionally, the first opening is perpendicular to the second opening, the conductive member is L-shaped, and the first conductive portion is perpendicular to the second conductive portion.

[0014] Optionally, the frequency of the cavity antenna is inversely proportional to the area of ​​the conductive member facing the opening; and / or

[0015] The frequency of the cavity antenna is inversely proportional to the length of the conductive member toward the opening.

[0016] Optionally, the distance between the conductive member and the opening is between 1 mm and 3 mm; and / or

[0017] The width of the conductive member on a side facing the opening is between 1 mm and 3 mm.

[0018] Optionally, the conductive cavity comprises: a metal shell and a conductive bracket connected to the metal shell, and the conductive bracket and the metal shell are enclosed to form the cavity antenna.

[0019] Optionally, the conductive bracket includes a bracket and a conductive layer wrapped around the bracket; the conductive layer is connected to the metal shell, and the bracket, the conductive layer and the metal shell are enclosed to form the cavity antenna; or

[0020] The conductive support comprises a metal shielding cover, the metal shielding cover is connected to the metal shell, and the metal shielding cover and the metal shell are enclosed to form the cavity antenna.

[0021] Optionally, the conductive bracket includes a main body and a bent portion, the main body has a side edge left vacant, the bent portion is formed at other edges of the main body and bent toward the metal shell, and the bent portion is connected to the metal shell; the main body, the bent portion and the metal shell together form the cavity antenna, and an opening is formed between the side edge left vacant by the main body and the metal shell; or

[0022] The conductive bracket includes a main body and a bending portion, the main body leaves two adjacent edges empty, the bending portion is formed on the other edges of the main body and is bent toward the direction of the metal shell, and the bending portion is connected to the metal shell; the main body, the bending portion and the metal shell together form the cavity antenna, and two openings are formed between the adjacent two vacant edges of the main body and the metal shell.

[0023] Optionally, the conductive part includes an FPC flexible circuit board or an LDS laser formed metal part.

[0024] In a second aspect, an embodiment of the present disclosure provides an electronic device, comprising a display screen and the antenna structure as described in the first aspect, wherein the display screen is disposed in the metal shell and connected to the conductive bracket.

[0025] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0026] It can be seen from the above embodiments that the antenna structure of the present disclosure sets a conductive member at the opening position corresponding to the cavity antenna, and there is a gap between the conductive member and the opening, and the frequency of the cavity antenna is reduced by coupling the conductive member with the cavity antenna. In this way, through the antenna form in which the conductive member is set, it is not necessary to open a window in the antenna area, and the volume of the cavity antenna can be reduced, so that the frequency of the cavity antenna can be reduced, and better low-frequency antenna radiation can be achieved, so as to achieve the identification function of interconnection, facilitate layout and ensure aesthetics.

[0027] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0029] Figure 1 is a partial schematic diagram of an electronic device according to an exemplary embodiment.

[0030] Figure 2 is a schematic diagram showing an antenna structure according to an exemplary embodiment.

[0031] Figure 3 is a schematic plan view of an antenna structure according to an exemplary embodiment.

[0032] Figure 4 is a schematic plan view of an antenna structure according to another exemplary embodiment.

[0033] Figure 5 and Figure 6 1 is an S11 and a Smith diagram obtained by simulating an antenna according to an exemplary embodiment.

[0034] Figure 7 is a diagram showing antenna isolation according to an exemplary embodiment. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0036] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0037] In order to facilitate understanding of the technical solution of the present disclosure, the antenna structure and electronic device of the present disclosure are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0038] See also Figures 1 to 3 As shown, an embodiment of the present disclosure provides an antenna structure, including: a conductive cavity, the conductive cavity forming a cavity antenna 41 having an opening 40. The antenna also includes a conductive member 20, which is arranged corresponding to the position of the opening 40 and is coupled with the cavity antenna 41. There is a gap between the conductive member 20 and the opening 40, and the coupling of the conductive member 20 and the cavity antenna 41 can reduce the frequency of the cavity antenna 41. Optionally, the conductive member 20 may include an FPC flexible circuit board or an LDS laser formed metal member.

[0039] It can be seen from the above embodiments that the antenna structure of the present invention is provided with a conductive part 20 at the position corresponding to the opening 40 of the cavity antenna 41, and there is a gap between the conductive part 20 and the opening 40, and the frequency of the cavity antenna 41 is reduced by coupling with the cavity antenna 41 through the conductive part 20. In this way, through the antenna form in which the conductive part 20 is provided as described above, after adding the conductive part 20, coupling with the cavity can be generated to shift the frequency of the cavity antenna toward a low frequency. The conductive part 20 is coupled with the cavity as a coupling metal to form an antenna as a whole. In this way, there is no need to open a window in the antenna area, and the volume of the cavity antenna 41 can be reduced, so that the frequency of the cavity antenna 41 can be reduced, and better low-frequency antenna radiation can be achieved, so as to achieve the recognition function of interconnection, facilitate layout and ensure aesthetics.

[0040] It is understandable that, taking the NFC antenna as an example, the frequency of the NFC antenna is about 13.56MHz, which belongs to the ultra-low frequency band. Conventional coil-shaped NFC antennas require as little metal as possible in the surrounding environment to achieve better antenna performance, and are not suitable for scenarios with all-metal back covers. The present disclosure adopts the form of a cavity antenna, and uses the cavity as the NFC antenna. Since it realizes the function of card simulation, that is, it can be recognized by the mobile phone, it can be applied to the all-metal back cover tablet to realize the NFC card simulation function, and does not require a window in appearance, which is beautiful.

[0041] In addition, the frequency of the cavity antenna is greatly affected by the cavity volume. If the conventional cavity antenna design method is adopted, the required cavity volume is large and occupies a large area of ​​the whole device. However, the antenna form of the embodiment of the present disclosure with a conductive member can greatly reduce the size occupied by the cavity antenna, thereby achieving better antenna radiation and achieving interconnection and interoperability recognition functions.

[0042] In some optional embodiments, the conductive cavity includes: a metal shell 10 and a conductive bracket 30 connected to the metal shell 10, and the conductive bracket 30 and the metal shell 10 are enclosed to form a cavity antenna 41 with an opening 40. Optionally, the conductive member 20 is insulated from the metal shell 10, and the conductive member 20 can be set on the metal shell 10 or on other components of the electronic device. It should be noted that the cavity antenna 41 can also be formed by other methods, and the present disclosure does not limit this.

[0043] In some optional embodiments, such as Figure 3 As shown, when the conductive bracket 30 is arranged at a non-corner position of the whole device, the cavity antenna 41 may have an opening 40, and the conductive member 20 may be in a long strip shape and arranged corresponding to the opening 40. Figure 4As shown, when the conductive bracket 30 is set at the corner position of the whole machine, the cavity antenna 41 can have a first opening 40A and a second opening 40B adjacent to each other, and the conductive member 20 can include a first conductive part 21 and a second conductive part 22 bent and connected to the first conductive part 21, the first conductive part 21 is set corresponding to the first opening 40, and the second conductive part 22 is set corresponding to the second opening 40. There is a gap between the first conductive part 21 and the first opening 40A and between the second conductive part 22 and the second opening 40B. In this embodiment, the first opening 40A is perpendicular to the second opening 40B, the conductive member 20 is L-shaped, and the first conductive part 21 is perpendicular to the second conductive part 22. Alternatively, the conductive cavity has at least two openings 40, and the conductive member 20 includes at least two conductive parts corresponding to the number of openings 40, each of which is set corresponding to an opening 40, and each of which has the gap between the conductive part and the corresponding opening 40. It should be noted that the number of openings can be set according to actual needs, and the structure of the conductive member is set according to the number and position of the openings, which is not limited by the present disclosure.

[0044] Optionally, the gap distance between the first conductive part 21 and the first opening 40A is equal to the gap distance between the second conductive part 22 and the second opening 40B. Alternatively, the gap distances between each conductive part and the corresponding opening 40 are equal. In this way, the distances between the first conductive part 21 and the second conductive part 22 and the cavity antenna 41 are close, or the distances between each conductive part and the corresponding opening 40 are close, which can achieve a better coupling effect between the conductive part and the cavity antenna.

[0045] In some optional embodiments, the frequency of the cavity antenna 41 is inversely proportional to the area of ​​the conductive member 20 on the side facing the opening 40. Generally, the larger the area of ​​the conductive member 20, the lower the frequency is after coupling with the cavity. The frequency of the cavity antenna 41 is inversely proportional to the length of the conductive member 20 on the side facing the opening 40. Generally, the longer the length of the conductive member 20, the lower the frequency is after coupling with the cavity. Optionally, the distance between the conductive member 20 and the opening 40 is between 1mm-3mm. The width of the conductive member 20 on the side facing the opening 40 is between 1mm-3mm, preferably 2mm. The length of the conductive member 20 is preferably at least longer than the length of the opening 40, that is, the conductive member 20 is preferably able to completely cover the opening 40, so as to achieve a better coupling effect. It should be noted that the dimensions such as the area, length, and gap between the conductive member 20 and the opening 40 of the conductive member 20 can be fine-tuned according to the actual frequency during actual debugging, and the present disclosure does not limit this.

[0046] In some optional embodiments, the conductive support 30 may be an FPC flexible circuit board having a conductive layer, such as Figure 1As shown, the conductive bracket 30 may include a bracket and a conductive layer wrapped around the bracket. The conductive layer is connected to the metal shell, and the bracket, the conductive layer and the metal shell 10 enclose the cavity antenna 41. Optionally, the bracket may include a plastic bracket, or a bracket of other insulating materials, which can support the conductive layer and increase the stability of the conductive layer. The conductive layer may be a flexible printed circuit (FPC) or other conductive layers, such as LDS (Laser-Direct-structuring) laser forming process layer, PDS (Printing Direct Structure) pad printing process layer, etc.

[0047] The conductive support 30 may also be a metal shielding cover, such as Figure 2 As shown, the conductive support 30 may include a metal shielding cover, which is connected to the metal shell 10 , and the metal shielding cover and the metal shell 10 are enclosed to form the cavity antenna 41 .

[0048] When the cavity antenna has an opening, the conductive bracket 30 may include a main body 31 and a bent portion 32, wherein the main body 31 has a vacant side edge, the bent portion 32 is formed at the other edge of the main body 31 and is bent toward the metal shell 10, and the bent portion 32 is connected to the metal shell 10. The main body 31, the bent portion 32, and the metal shell 10 are enclosed to form the cavity antenna 41, and an opening 40 is formed between the vacant side edge of the main body 31 and the metal shell 10, that is, the opening 40 is formed between the edge of the main body 31 where the bent portion 32 is not formed and the metal shell 10.

[0049] When the cavity antenna has two openings, the conductive bracket 30 includes a main body 31 and a bent portion 32, the main body 31 leaves two adjacent edges vacant, the bent portion 32 is formed at other edges of the main body 31 and is bent toward the metal shell 10, and the bent portion 32 is connected to the metal shell 10. The main body 31, the bent portion 32 and the metal shell 10 enclose the cavity antenna 41, and two openings 40 are formed between the adjacent two vacant edges of the main body 31 and the metal shell 10, that is, the opening 40 is formed between the edge of the main body 31 where the bent portion 32 is not formed and the metal shell 10.

[0050] Optionally, the bending portion 32 and the metal shell 10 can be directly welded by SMT welding method, or connected by an object of conductive material such as a spring sheet or conductive foam. The conductive bracket 30 can be rectangular, and the main body 31 can be rectangular. The edges of three sides of the main body 31 are bent toward the metal shell 10 to form the bending portion 32 and connected to the metal shell 10, and an opening is reserved on the edge of the other side, thereby realizing a structural form in which the conductive bracket is connected to the metal shell on three sides and an opening is reserved on one side. Alternatively, the edges of two adjacent sides of the main body 31 are bent toward the metal shell 10 to form the bending portion 32 and connected to the metal shell 10, and openings are reserved on the edges of the other two sides, thereby realizing a structural form in which the conductive bracket is connected to the metal shell on both sides and openings are reserved on both sides.

[0051] The metal shell 10 may include a bottom wall 11 and a side wall 12 connected to the bottom wall 11, and the conductive bracket may be connected to the bottom wall 11. The bottom wall 11 and the side wall 12 may be integrally formed to form a unibody metal back shell. It should be noted that the size of the opening may also be adjusted according to actual needs to match different antenna frequency bands. For example, the edge of the main body near the opening may be further bent to form a smaller bending portion to achieve the change and control of the length and width of the opening, and the degree of bending may be set according to actual needs.

[0052] In some optional embodiments, the bending portion 32 is provided with a plurality of first conductive connectors 33 at intervals along the length direction, and the first conductive connector 33 is connected to the metal shell 10, thereby realizing the electrical connection between the conductive bracket 30 and the metal shell 10. The main body 31, the bending portion 32, the first conductive connector 33 and the metal shell 10 enclose the cavity antenna 41. In this way, the conductive bracket is connected to the metal shell through the first conductive connector, which can improve the sealing and reliability of the electrical connection. Optionally, the first conductive connector 33 can be a gold-plated conductive foam, conductive silicone, conductive cloth, etc. pasted on the bending portion 32 of the conductive bracket 30. It can be understood that the conductive bracket 30 and the metal shell 10 are contacted and connected through the first conductive connector 33 to realize the electrical connection between the conductive bracket 30 and the metal shell 10, and a cavity antenna 41 is formed in a narrow space by the conductive bracket 30, the first conductive connector 33 and the metal shell 10.

[0053] Optionally, the first conductive connector 33 may be one or more. When there are more than one first conductive connector 33, the first conductive connectors 33 may be arranged at intervals corresponding to the edges of the main body 31 of the conductive support 30 except the edge corresponding to the opening 40, so as to surround the cavity mode antenna and improve the antenna performance. When there is one first conductive connector 33, the first conductive connector 33 is annularly surrounding the edges of the main body 31 of the conductive support 30 except the edge corresponding to the opening 40.

[0054] Combination Figure 1 As shown, in some optional embodiments, a second conductive connector 34 is provided on a side of the conductive bracket 30 away from the metal shell 10, and the second conductive connector 34 is provided corresponding to the opening 40. When the antenna is applied to an electronic device with a display screen 90, the second conductive connector 34 can be used to connect to the display screen 90 to play a grounding role, thereby reducing clutter, reducing interference to the display screen, and improving the efficiency of the antenna. Optionally, the second conductive connector 34 can be a conductive foam, conductive silicone, conductive cloth, etc. pasted on the conductive bracket 30, and the number of the second conductive connector 34 can be one or more, arranged according to the antenna performance requirements.

[0055] See also Figures 5 to 7 As shown, taking the NFC antenna as an example, the simulation performance of the antenna of the embodiment of the present disclosure is as follows: NFC frequency: 13.56MHz, the impedance of the flat NFC is tuned to 20-25ohm, and the impedance of the coil is tuned to around 50Ohm. The worst isolation is -25dB, which meets the performance requirements of card simulation.

[0056] See again Figure 1 As shown, the embodiment of the present disclosure also provides an electronic device, which may be, for example, an electronic product such as a mobile phone, a tablet computer, a laptop computer, a wearable device, a smart bracelet, a smart watch, smart glasses, etc. The electronic device includes a display screen 90 and an antenna structure as described in the above embodiments and implementation methods, and the display screen 90 is arranged on the metal shell 10 and connected to the conductive bracket 30. It can be understood that the display screen can be electrically connected to the conductive bracket 30 through a second conductive connector, and the position of the cavity antenna on the display screen is not limited. The electronic device disclosed in the present disclosure adopts the antenna form with the above-mentioned conductive member, which can be suitable for the scene of an all-metal back cover, and can reduce the size occupied by the cavity antenna.

[0057] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0058] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An antenna structure, characterized in that: include: A conductive cavity, wherein the conductive cavity forms a cavity antenna having an opening; A conductive member, arranged corresponding to the position of the opening and coupled with the cavity antenna; A gap is formed between the conductive element and the opening.

2. The antenna structure according to claim 1, characterized in that: The conductive cavity has an opening, and the conductive member is in a long strip shape; or The conductive cavity has a first opening and a second opening adjacent to each other, the conductive member includes a first conductive portion and a second conductive portion bent and connected to the first conductive portion, the first conductive portion is arranged corresponding to the first opening, and the second conductive portion is arranged corresponding to the second opening; the gap is provided between the first conductive portion and the first opening, and between the second conductive portion and the second opening; or The conductive cavity has at least two openings, the conductive member includes at least two conductive parts corresponding to the number of the openings, each conductive part is arranged corresponding to one of the openings; and there is a gap between each conductive part and the corresponding opening.

3. The antenna structure according to claim 2, characterized in that: The gap distance between the first conductive portion and the first opening is equal to the gap distance between the second conductive portion and the second opening; or The gap distance between each of the conductive parts and the corresponding opening is equal.

4. The antenna structure according to claim 2, characterized in that: The first opening is perpendicular to the second opening, the conductive element is L-shaped, and the first conductive portion is perpendicular to the second conductive portion.

5. The antenna structure according to claim 1, characterized in that: The frequency of the cavity antenna is inversely proportional to the area of ​​the conductive member facing the opening; and / or The frequency of the cavity antenna is inversely proportional to the length of the conductive member toward the opening.

6. The antenna structure according to claim 1, characterized in that: The distance between the conductive member and the opening is between 1 mm and 3 mm; and / or The width of the conductive member on a side facing the opening is between 1 mm and 3 mm.

7. The antenna structure according to claim 1, characterized in that: The conductive cavity comprises: a metal shell and a conductive bracket connected to the metal shell, and the conductive bracket and the metal shell are enclosed to form the cavity antenna.

8. The antenna structure according to claim 7, characterized in that: The conductive bracket includes a bracket and a conductive layer wrapped around the bracket; the conductive layer is connected to the metal shell, and the bracket, the conductive layer and the metal shell are enclosed to form the cavity antenna; or The conductive support comprises a metal shielding cover, the metal shielding cover is connected to the metal shell, and the metal shielding cover and the metal shell are enclosed to form the cavity antenna.

9. The antenna structure according to claim 7, characterized in that: The conductive bracket includes a main body and a bent portion, the main body has a side edge left, the bent portion is formed at the other edge of the main body and is bent toward the metal shell, and the bent portion is connected to the metal shell; the main body, the bent portion and the metal shell together form the cavity antenna, and an opening is formed between the side edge left by the main body and the metal shell; or The conductive bracket includes a main body and a bending portion, the main body leaves two adjacent edges empty, the bending portion is formed on the other edges of the main body and is bent toward the direction of the metal shell, and the bending portion is connected to the metal shell; the main body, the bending portion and the metal shell together form the cavity antenna, and two openings are formed between the adjacent two vacant edges of the main body and the metal shell.

10. The antenna structure according to claim 1, characterized in that: The conductive part includes an FPC flexible circuit board or an LDS laser formed metal part.

11. An electronic device, characterized in that: It comprises a display screen and the antenna structure as described in any one of claims 1 to 10, wherein the display screen is arranged on the metal shell and connected to the conductive bracket.

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