Antenna and electronic device

Abstract

The application discloses an antenna and an electronic device, and relates to the technical field of communication. In the application, a first branch is arranged in a ring and a first perforation, first ends and second ends of the first branch are arranged at intervals to form an opening, the opening is communicated with the first perforation, and the first branch is electrically connected with a feed source. The feed source feeds an excitation signal to the first branch, the excitation signal excites the first branch to generate a first resonant mode and / or a second resonant mode supporting a low-frequency frequency band. Surface currents in the first resonant mode include currents distributed along a first direction on a ground plane. Surface currents in the second resonant mode include currents distributed along a second direction on the ground plane. The antenna of the application can be arranged in a limited space in the electronic device. In addition, the antenna becomes a multi-resonant ultra-wideband antenna, thereby improving the performance of the antenna. Furthermore, the distribution of the surface currents on the ground plane can improve the phenomenon that the antenna radiation performance is reduced due to the user holding the electronic device.

Description

Technical Field

[0001] This application relates to the field of communication technology, specifically to an antenna and electronic device. Background Technology

[0002] With the rapid development of wireless communication technology, higher requirements are being placed on the antenna design of electronic devices. Designing ultra-wideband antennas within the limited space of electronic devices to meet the ever-increasing frequency band demands and communication performance requirements is a pressing issue that needs to be addressed. Utility Model Content

[0003] This application provides an antenna, comprising: a first stub, the first stub being looped and having a first perforation formed inside the first stub; the first stub including a first end and a second end along the looping direction; the first end and the second end being spaced apart to form openings; the openings communicating with the first perforation; and the first stub being electrically connected to a feed source; wherein the feed source is used to feed an excitation signal to the first stub to excite the first stub to generate a first resonant mode and / or a second resonant mode supporting a low-frequency band; the surface current in the first resonant mode includes a current distributed along a first direction on the ground surface; the surface current in the second resonant mode includes a current distributed along a second direction on the ground surface; the first direction and the second direction are perpendicular to each other.

[0004] In some embodiments, the first branch is provided with a power supply section electrically connected to the power source, the power supply section being formed by extending the first branch outward from the first branch.

[0005] In some embodiments, the antenna further includes: a second stub disposed within the first perforation and connected to the first stub; wherein the feed source is used to feed an excitation signal to the second stub to excite the second stub to generate a resonant mode supporting a low-frequency band, a mid-frequency band, or a high-frequency band.

[0006] In some embodiments, the second branch is formed by bending and extending the first end toward the interior of the first branch, and the power supply portion is disposed on the first branch near the first end.

[0007] In some embodiments, the second end is provided with a second perforation and a notch, the second perforation communicating with the first perforation, and the opening direction of the notch facing outward of the first branch.

[0008] In some embodiments, the second perforation is L-shaped.

[0009] In some embodiments, the first resonant mode is configured to support the B28 band, and the second resonant mode is configured to support the B8 band.

[0010] This application provides an electronic device, including: a main body having a ground plane and a feed source; and an antenna, which is an antenna as described above, and the antenna is disposed on the main body.

[0011] In some embodiments, the main body includes: a body having the ground plane and the feed source; and an antenna bracket extending from the body, with the antenna surrounding the side surface of the antenna bracket.

[0012] In some embodiments, the body has two long sides extending in a first direction and two short sides extending in a second direction, and the antenna support is disposed on the short sides.

[0013] The beneficial effects of adopting the technical solution described in this application are as follows: This application uses a first segment of the antenna to form a loop, allowing for arrangement within the limited space of the electronic device. Furthermore, the specific structural design of the first segment, such as forming a loop or having the first and second ends spaced apart, can support a first resonant mode and / or a second resonant mode, making the antenna a multi-resonant ultra-wideband antenna, thereby improving antenna performance. Moreover, the distribution of surface current on the ground plane can mitigate the reduction in antenna radiation performance caused by the user holding the electronic device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of an electronic device in some embodiments of this application; Figure 2 for Figure 1 A partial structural diagram of the electronic device in the illustrated embodiment; Figure 3 for Figure 2 A schematic diagram of a portion of the electronic device structure in the illustrated embodiment from another perspective; Figure 4 for Figure 1 A partial structural diagram of the electronic device in the embodiment; Figure 5 for Figure 4 The diagram shows the structure of the antenna in the embodiment shown. Figure 6 for Figure 5 The antenna shown in the embodiment is a structural schematic diagram of its structure in other embodiments; Figure 7 for Figure 5 The antenna shown in the embodiment is a structural schematic diagram of its structure in other embodiments; Figure 8 This is a schematic diagram of the surface current distribution on the ground surface under the first resonant mode; Figure 9 This is a schematic diagram showing the distribution of surface current on the ground surface under the second resonant mode; Figure 10 for Figure 1 A schematic diagram of the antenna performance of the medium-sized antenna; Figure 11 for Figure 1 A schematic diagram of the antenna performance of the medium antenna.

[0016] 10. Housing; 11. Body; 12. Column; 20. Mainboard; 21. Ground plane; 22. Feed source; 30. Antenna; 31. First branch; 32. Second branch; 100. Electronic equipment; 111. First long side; 112. Second long side; 113. First short side; 114. Second short side; 121. Side peripheral surface; 301. Feed section; 302. First through hole; 303. Opening; 304. Second through hole; 305. Notch; 311. First end; 312. Second end; 313. Third end; 314. Fourth end. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0018] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a mutually exclusive, independent, or alternative implementation. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0019] This application provides an electronic device. As used herein, "electronic device" (also referred to as "terminal," "mobile terminal," or "electronic device") includes, but is not limited to, means configured to receive / transmit communication signals via a wired connection (such as via a Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection, and / or another data connection / network) and / or via a wireless interface (e.g., for cellular networks, wireless local area networks (WLANs), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters, and / or another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radiotelephone with data processing, fax, and data communication capabilities; PDAs that may include walkie-talkies, radiotelephones, pagers, Internet / intranet access, web browsers, notebooks, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers.

[0020] In some embodiments, an antenna is provided on the electronic device. The antenna can be arranged within a limited space within the electronic device. The antenna can support multiple resonant modes to become a multi-resonant ultra-wideband antenna. In addition, the antenna can also mitigate the reduction in antenna radiation performance caused by the user holding the electronic device.

[0021] In some embodiments, at least a portion of the antenna may be one or more of a flexible printed circuit (FPC) antenna, a laser direct structuring (LDS) antenna, a printed direct structuring (PDS) antenna, and a metal stub antenna. Of course, the antenna may also be other types of antennas, which will not be elaborated upon.

[0022] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of an electronic device in some embodiments of this application. Figure 2 for Figure 1 The diagram shows a partial structural schematic of the electronic device in the embodiment shown. Figure 3 for Figure 2The illustrated embodiment presents a schematic diagram of a portion of the electronic device's structure from another perspective. The electronic device 100 may include a housing 10, a motherboard 20 disposed within the housing 10, and an antenna 30 disposed on the housing 10. The housing 10 serves as a carrier for the internal structure of the electronic device 100, supporting and mounting the motherboard 20, antenna 30, etc. The motherboard 20 may be electrically connected to the antenna 30, enabling radiated communication through the antenna 30.

[0023] Please see Figure 1 and Figure 4 , Figure 4 for Figure 1 This is a partial structural schematic diagram of the electronic device 100 in the embodiment. The housing 10 may include a body 11 and a column 12. The body 11 serves as the main structure of the housing 10, supporting the internal structures of the electronic device 100, such as the motherboard 20 and the antenna 30. The column 12 extends from the body 11 and has a side peripheral surface 121. In some embodiments, the antenna 30 may not be disposed on the body 11 but may be disposed on the column 12, thereby reducing the space occupied by the housing 10, such as the internal space of the body 11. In some embodiments, the antenna 30 may be disposed on the side peripheral surface 121 to minimize the size of the antenna 30 and reduce space occupation.

[0024] It is understandable that object A extending from object B means that object A is placed on the surface of object B, or that object A and object B are connected to create the appearance that object A is placed on the surface of object B. That is, object A and object B can be two structures, or one structure. Furthermore, object A and object B can also be a single structure.

[0025] In some embodiments, the body 11 may have two long sides extending in the first direction X, such as a first long side 111 and a second long side 112, and two short sides extending in the second direction Y, such as a first short side 113 and a second short side 114. The two long sides and the two short sides may be connected sequentially. In some embodiments, the first long side 111 and the second long side 112 may be arranged opposite to each other. In some embodiments, the first short side 113 and the second short side 114 may be arranged opposite to each other. In some embodiments, at least one of the two long sides may not extend in the first direction X. In some embodiments, at least one of the two short sides may not extend in the second direction Y.

[0026] In some embodiments, the column 12 may be disposed on the short side, such as the second short side 114.

[0027] Please see Figure 2 and Figure 3 The motherboard 20 can be equipped with various electronic components, including at least some of the electronic components of the electronic device 100. The configuration of the motherboard 20 enables at least some of the functions of the electronic device 100.

[0028] In some embodiments, a ground plane 21 may be provided on the motherboard 20. In some embodiments, the ground plane 21 may not be provided on the motherboard 20, but may be provided on the housing 10, such as the body 11.

[0029] In some embodiments, a feed source 22 may be provided on the motherboard 20 for electrical connection with the antenna 30. The feed source 22 can then feed an excitation signal to the antenna 30 to excite the antenna 30 to generate a supporting vibration mode, thereby achieving the antenna performance of the antenna 30. In some embodiments, the feed source 22 may be disposed on the electronic device 100 in other ways, instead of on the motherboard 20. In a further embodiment, the feed source 22 may also be disposed on the housing 10, such as the body 11.

[0030] Please see Figure 4 and Figure 5 , Figure 5 for Figure 4 The illustrated embodiment shows a schematic diagram of the antenna 30. The antenna 30 may include a first stub 31. The first stub 31 may be electrically connected to the main board 20, such as the feed source 22, so that the main board 20, such as the feed source 22, can feed an excitation signal to the first stub 31 to excite the first stub 31 to generate a resonant mode that supports the low-frequency band (LB).

[0031] In some embodiments, the motherboard 20, for example, the feed source 22, may feed an excitation signal to the first stub 31 to excite the first stub 31 to generate a first resonant mode that supports the low-frequency band.

[0032] In some embodiments, the surface current in the first resonant mode includes a current distributed along the first direction X on the ground plane 21, which can improve the antenna radiation performance reduction caused by the user holding the electronic device 100 and enhance the antenna performance.

[0033] In some embodiments, the motherboard 20, for example, the feed source 22, may feed an excitation signal to the first stub 31 to excite the first stub 31 to generate a second resonant mode that supports a low-frequency band. In some embodiments, the low-frequency band supported by the second resonant mode is greater than the low-frequency band supported by the first resonant mode.

[0034] In some embodiments, the surface current in the second resonant mode includes a current distributed along the second direction Y on the ground plane 21. The first direction being perpendicular to the second direction can mitigate the reduction in antenna radiation performance caused by the user holding the electronic device 100, thereby improving antenna performance.

[0035] In some embodiments, when the excitation signal excites the first stub 31 to generate a first resonant mode and a second resonant mode that support the low-frequency band, the antenna 30 can become a multi-resonant ultra-wideband antenna, thereby improving the antenna performance.

[0036] In some embodiments, the first resonant mode is configured to support the B28 band.

[0037] In some embodiments, the second resonant mode is configured to support the B8 band.

[0038] In some embodiments, the first branch 31 may be provided with a power supply section 301 electrically connected to the main board 20, such as the feed source 22. In some embodiments, the antenna 30 may also include a matching circuit connected in series between the feed source 22 and the power supply section 301, so as to adjust the low-frequency band supported by the first resonant mode and / or the low-frequency band supported by the second resonant mode through the matching circuit.

[0039] In some embodiments, the matching circuit may include a switch control unit and / or a load circuit, or an adjustable capacitor and / or an adjustable inductor, or an adjustable capacitor and / or a switch control unit. In one embodiment, the switch control unit may be a switch chip with switching function, or a single-pole multi-throw switch, a single-pole single-throw switch, or a multi-pole multi-throw switch.

[0040] In some embodiments, the first branch 31 may be looped around the column 12, with the third end 311 and the fourth end 312 spaced apart in the Z-direction. In some embodiments, the first branch 31 may be looped around the column 12 to reduce the space occupied within the electronic device 100. Additionally, it may reduce the loss of antenna radiation performance due to the user holding the electronic device 100. In some embodiments, the first branch 31 may be looped around the side circumferential surface 121 of the column 12 to simplify the installation. In a further embodiment, the housing 10 may also include a decorative shell, which may be fitted onto the column 12 to prevent the antenna 30 from being exposed. Moreover, the decorative shell does not affect the antenna performance of the antenna 30 and can also improve the appearance of the electronic device 100. In some embodiments, the decorative shell may be part of the column 12, thereby allowing the antenna 30 to be embedded within the column 12. In some embodiments, the first branch 31 may be looped around the column and may be disposed within the housing 10, for example, the body 11, so that it can be arranged within the limited space within the electronic device 100.

[0041] In some embodiments, it may be possible Figure 5 The middle is bent along the surrounding direction Z to surround the side circumferential surface 121 of the column 12.

[0042] Please see Figure 5 , Figure 6 and Figure 7 , Figure 6 for Figure 5 The illustrated embodiment shows a schematic diagram of the antenna 30 in other embodiments. Figure 7 for Figure 5The illustrated embodiment shows a schematic diagram of the antenna 30 in other embodiments. The first branch 31 can be wound into a loop and forms a first perforation 302.

[0043] The first branch 31 is provided at a distance from the first end 313 and the second end 314 in the circumferential direction M.

[0044] The first perforation 302 extends in the circumferential direction Z to change the effective electrical length of the first stub 31, thereby making the antenna 30 more miniaturized and improving its antenna performance.

[0045] Understandably, in some embodiments, Figure 5 , Figure 6 and Figure 7 The antenna 30 shown can be directly used in the electronic device 100 in the above embodiments, or it can be further wrapped in a ring along the surrounding direction Z, for example, it can be wrapped around the column 12 so that it can be used in the electronic device 100 in the above embodiments.

[0046] In some embodiments, the first stub 31 has an opening 303 near the feed section 301, which can communicate with the first through hole 302 to change the effective electrical length of the first stub 31, thereby making the antenna 30 more miniaturized and improving its antenna performance. In some embodiments, the feed section 301 is formed by extending the first stub 31 outward.

[0047] In some embodiments, the first branch 31 may form a first end 313 and a second end 314 at the opening 303. In some embodiments, the first end 313 is closer to the power supply section 301 than the second end 314. The first end 313 and the second end 314 are spaced apart at the opening 303.

[0048] Please see Figure 6 The antenna 30 may also include a second stub 32. The second stub 32 may be electrically connected to the main board 20, for example, a feed source 22. Furthermore, the feed source 22 may feed an excitation signal to the second stub 32 to excite the second stub 32 to generate a resonant mode that supports the low-frequency band, mid-frequency band (MB), or high-frequency band (HB), thereby making the antenna 30 a multi-resonant ultra-wideband antenna and thus improving antenna performance.

[0049] In some embodiments, the second branch 32 may be disposed within the first perforation 302, spaced apart from the first branch 31, and may be disposed around or extend in the circumferential direction Z. In some embodiments, the second branch 32 may be disposed around the column 12 to reduce the occupation of the limited space within the electronic device 100. Additionally, it may reduce the loss of antenna radiation performance due to the user holding the electronic device 100. In some embodiments, the second branch 32 may be disposed around the side circumferential surface 121 of the column 12 to simplify the installation process.

[0050] In some embodiments, the second stub 32 may be connected to the first stub 31 to share the feed section 301, simplifying the design and enabling the antenna 30 to be miniaturized and its performance improved. In some embodiments, the second stub 32 may be connected to the first stub 31 at a position adjacent to the feed section 301. In some embodiments, one end of the second stub 32 is connected to, for example, a first end 313 of the second stub 32. In some embodiments, the second stub 32 may be integrally formed with the first stub 31. In some embodiments, the second stub 32 is formed by bending and extending the first end 313 inward into the first stub 31.

[0051] Please see Figure 7 The first stub 31, for example, has a second perforation 304 at its second end 314 that communicates with the first perforation 302, thereby changing the effective electrical length of the first stub 31. This allows the antenna 30 to be more miniaturized and its antenna performance to be improved. In a further embodiment, the second perforation 304 can also enable the first stub 31 to support other resonant modes at its second end 314, making the antenna 30 a multi-resonant ultra-wideband antenna, thereby improving antenna performance.

[0052] Please see Figure 7 The first stub 31, for example, has a notch 305 on its second end 314 to change the effective electrical length of the first stub 31, making the antenna 30 more miniaturized and improving its antenna performance. In a further embodiment, the second aperture 304 can also enable the first stub 31 to support other resonant modes at its second end 314, making the antenna 30 a multi-resonant ultra-wideband antenna, thereby improving antenna performance. In some embodiments, the opening direction of the notch 305 faces outwards from the first stub 31. In some embodiments, the second aperture 304 is L-shaped.

[0053] Please see Figure 8 , Figure 8 This is a schematic diagram of the surface current distribution on the peripheral surface 121 in the first resonant mode. In this mode, the surface current is at least partially distributed along the first direction X on the ground plane 21, thereby mitigating the reduction in antenna radiation performance caused by the user holding the electronic device 100.

[0054] Please see Figure 9 , Figure 9 This is a schematic diagram showing the distribution of surface current on ground plane 21 under the second resonant mode. In this mode, the surface current on ground plane 21 can be at least partially distributed along the second direction Y, thereby mitigating the reduction in antenna radiation performance caused by the user holding the electronic device 100.

[0055] Please see Figure 10 , Figure 10 for Figure 1 The diagram illustrates the antenna performance of antenna 30, with the horizontal axis representing frequency (GHz) and the vertical axis representing return loss (dB). The curves show the first and second resonant modes, as well as the resonant modes supported by the second stub 32. Therefore, antenna 30 can function as a multi-resonant ultra-wideband antenna, thereby improving antenna performance. The curves show points (0.70748, -6.5106) and (0.95789, -4.8575), and points (1.7634, -7.2258) and (2.6755, -22.272). Point (0.70748, -6.5106) corresponds to the first resonant mode, and point (0.95789, -4.8575) corresponds to the second resonant mode. Points (1.7634, -7.2258) and (2.6755, -22.272) correspond to the resonant modes supported by the second branch 32.

[0056] Please see Figure 11 , Figure 11 for Figure 1 The diagram illustrates the antenna performance of antenna 30, with the horizontal axis representing frequency (GHz) and the vertical axis representing return loss (dB). It includes curves for system radiation efficiency (SRA) and total antenna efficiency (STA), which equals SRA - return loss. The STA curve shows points (0.70735, -1.8721), (0.9565, -4.3768), (1.8917, -1.588), and (2.62, -2.6854). The return loss at these points is relatively low, indicating good impedance matching and overall antenna performance.

[0057] Radio frequency performance tests were conducted using two different electronic devices 100 in a handheld state to investigate the phenomenon of reduced antenna radiation performance caused by the user holding the electronic device 100. The test results are as follows:

[0058] The inclusion of electronic device 100 can reduce antenna radiation performance to within 4dB. Compared to conventional devices, the inclusion of electronic device 100 in this application can improve antenna radiation performance and mitigate the reduction in antenna radiation performance caused by the user holding electronic device 100.

[0059] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0060] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0061] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0062] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An antenna, characterized by include: The first branch is encircled into a ring and a first perforation is formed inside the first branch. The first branch includes a first end and a second end along the encircling direction. The first end and the second end are spaced apart to form an opening. The opening communicates with the first perforation. The first branch is electrically connected to the feed source. The feed source is used to feed an excitation signal into the first stub to excite the first stub to generate a first resonant mode and / or a second resonant mode that supports the low-frequency band. The surface current in the first resonant mode includes a current distributed along a first direction on the ground surface; The surface current in the second resonant mode includes the current distributed along the second direction on the grounding surface; The first direction is perpendicular to the second direction.

2. The antenna according to claim 1, characterized in that, The first branch is provided with a power supply section that is electrically connected to the power source, and the power supply section is formed by extending the first branch outward from the first branch.

3. The antenna of claim 2, wherein, The antenna also includes: The second branch is located inside the first perforation and connected to the first branch; The feed source is used to feed an excitation signal into the second stub to excite the second stub to generate a resonant mode that supports the low-frequency band, the mid-frequency band, or the high-frequency band.

4. The antenna according to claim 3, characterized in that, The second branch is formed by bending and extending the first end toward the interior of the first branch, and the power supply part is provided in the first branch near the first end.

5. The antenna according to any one of claims 2-4, characterized in that, The second end is provided with a second perforation and a notch, the second perforation is connected to the first perforation, and the opening direction of the notch faces the outside of the first branch.

6. The antenna according to claim 5, characterized in that, The second perforation is L-shaped.

7. The antenna according to claim 1, characterized in that, The first resonant mode is set to support the B28 frequency band, and the second resonant mode is set to support the B8 frequency band.

8. An electronic device, characterized in that, include: The main body has a grounding surface and a feed source; An antenna, wherein the antenna is the antenna as described in any one of claims 1-7, and the antenna is disposed on the main body.

9. The electronic device according to claim 8, characterized in that, The subject includes: The main body is provided with the ground plane and the feed source; An antenna support extends from the main body, and the antenna is arranged around the side circumferential surface of the antenna support.

10. The electronic device according to claim 9, characterized in that, The body has two long sides extending in a first direction and two short sides extending in a second direction, and the antenna support is disposed on the short sides.

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