Antenna device and electronic device

Abstract

This application relates to an antenna device and an electronic device. The antenna device includes an antenna body and a feed module electrically connected to the antenna body. The antenna body includes a first conductive stub, a second conductive stub, and a parasitic stub. The first conductive stub has a first feed point and is used to support a first frequency band. A first gap is provided between the first and second conductive stubs, and the second conductive stub has a second feed point and is used to support the first frequency band. A second gap is provided between the parasitic stub and the first conductive stub. The feed module includes a first feed circuit and a second feed circuit. When the first conductive stub radiates a signal in the first frequency band, it couples with the parasitic stub so that the parasitic stub and the first conductive stub jointly radiate a signal in the first frequency band. In the above-described antenna device, the isolation between the first and second conductive stubs is relatively high.

Description

Technical Field

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

[0002] With the advancement of science and technology, communication technology has developed rapidly and made significant progress. As communication technology has improved, the popularity of smart electronic products has reached unprecedented levels. More and more smart terminals or electronic devices have become an indispensable part of people's lives, such as smartphones, smart bracelets, smartwatches, smart TVs, and computers. These electronic devices transmit signals through built-in antenna devices to achieve functions such as voice calls, navigation, and wireless internet access. The radiator, as a crucial component of the antenna device, directly affects the communication performance of the antenna system through its design and placement within the phone.

[0003] Current electronic devices typically have one or more slots in the metal frame to divide the metal frame into multiple metal stubs, which can form multiple metal frame antennas. However, to achieve signal radiation in multiple frequency bands, more metal stubs are needed. For example, to support signals in two frequency bands, two metal stubs may be required. Alternatively, two different metal stubs may be used to support signals in the same frequency band. However, when two metal stubs are located on a metal frame with limited space, the isolation between the two metal stubs is too low, which affects the radiation efficiency. Summary of the Invention

[0004] This application provides an antenna device and an electronic device.

[0005] In a first aspect, embodiments of this application provide an antenna device, comprising an antenna body and a feed module electrically connected to the antenna body. The antenna body includes a first conductive stub, a second conductive stub, and a parasitic stub. The first conductive stub has a first feed point and is used to support a first frequency band. A first gap is provided between the first and second conductive stubs, and the second conductive stub has a second feed point and is used to support the first frequency band. A second gap is provided between the parasitic stub and the first conductive stub. The feed module includes a first feed circuit and a second feed circuit. The first feed circuit is connected to the first feed point and configured to feed a first current signal to the first conductive stub via the first feed point, so that the first conductive stub radiates a signal of the first frequency band. When the first conductive stub radiates a signal of the first frequency band, it couples with the parasitic stub so that the parasitic stub and the first conductive stub jointly radiate a signal of the first frequency band. The second feed circuit is connected to the second feed point and configured to feed a second current signal to the second conductive stub via the second feed point, so that the second conductive stub radiates a signal of the first frequency band.

[0006] Secondly, embodiments of this application provide an electronic device, including a housing and the aforementioned antenna device, wherein the antenna device is integrated into the housing.

[0007] The antenna device and electronic device provided in this application include a first conductive stub and a second conductive stub spaced apart from each other. The first conductive stub and the second conductive stub are respectively used to support a first frequency band signal, so that the antenna device has a strong radiation capability in the first frequency band. Further, a parasitic stub spaced apart from the first conductive stub is introduced. When the first conductive stub radiates a signal in the first frequency band, the radiated energy is coupled to the parasitic stub through a second gap, so that the parasitic stub and the first conductive stub jointly radiate the signal in the first frequency band, so that the excitation current can flow towards the parasitic stub, and the current on the first conductive stub can also be relatively concentrated on the part of the first conductive stub near the parasitic stub. Correspondingly, the current on the first conductive stub near the second conductive stub is relatively weak. Therefore, when the first conductive stub, the second conductive stub, and the parasitic stub radiate signals in the first frequency band, the parasitic stub can improve the electric field distribution of the first conductive stub, causing the energy of the current to concentrate in a direction relatively far away from the second conductive stub, avoiding unnecessary mutual coupling between the first and second conductive stubs, resulting in relatively good isolation between the first and second conductive stubs, and relatively high radiation efficiency of the first conductive stub and the parasitic stub. Attached Figure Description

[0008] To more clearly illustrate the technical solution of the application, the drawings used in the implementation will be briefly introduced below. Obviously, the drawings described below are only some implementations of the application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of an antenna device provided in an embodiment of this application.

[0010] Figure 2 This is a schematic diagram of another structure of the antenna device provided in the embodiments of this application.

[0011] Figure 3 yes Figure 2 The diagram shown illustrates an antenna device configured with a first type of first frequency band switching module.

[0012] Figure 4 yes Figure 2 The diagram shown illustrates an antenna device configured with a second type of first frequency band switching module.

[0013] Figure 5 This is a schematic diagram of another structure of the antenna device provided in the embodiments of this application.

[0014] Figure 6 yes Figure 5 The diagram shown illustrates an antenna device configured with a first type of second frequency band switching module.

[0015] Figure 7 yes Figure 5 The diagram shown illustrates an antenna device configured with a second type of second-band switching module.

[0016] Figure 8 The image shows a grayscale simulation of the current distribution simulated by the structure of a conventional antenna and the antenna device provided in the embodiments of this application.

[0017] Figure 9 Simulation diagrams of S-parameters and radiation efficiency of conventional antennas and antenna devices provided in embodiments of this application are shown.

[0018] Figure 10 This is a schematic diagram of the electronic device provided in the embodiments of this application.

[0019] Figure 11 yes Figure 10 The diagram shows the internal structure of the electronic device. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] The term "electronic device" as used in this application includes, but is not limited to, devices configured to receive / transmit communication signals via wired connections (such as via the 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," "electronic device," and / or "electronic device." Examples of electronic devices include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radiotelephones with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, notebooks, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or handheld receivers, game consoles, or other electronic devices that include radiotelephone transceivers.

[0022] Current electronic devices typically have one or more slots in the metal frame to divide the metal frame into multiple metal segments, which can form multiple metal frame antennas. Due to the limited space of the frame, the isolation between multiple metal segments is poor.

[0023] To address the aforementioned problems, the inventors of this application, after extensive and repeated research, discovered that improving the antennas of current electronic devices by altering the relative spatial positions of multiple metal stubs can increase the clearance area of ​​each metal stub, ensuring that the signals radiated by multiple metal stubs do not interfere with each other, thereby improving the isolation between the metal stubs. However, the inventors further discovered that increasing the clearance area of ​​the metal stubs inevitably requires occupying more wiring space and also encroaches on the installation space of other components in the electronic device. If too much space is occupied by other components, the overall spatial layout of the electronic device's components needs to be changed. Once the spatial layout of the electronic device's components is changed, some electromagnetic components will in turn affect the clearance area or radiation efficiency of the metal stubs.

[0024] Therefore, the inventors of this application have focused on researching how to make the installation space of the antenna device more compact while minimizing the isolation between multiple metal stubs of the antenna device. After extensive and repeated research, the inventors have proposed an antenna device according to embodiments of this application, and an electronic device having the antenna device. The antenna device includes an antenna body and a feed module electrically connected to the antenna body. The antenna body includes a first conductive stub, a second conductive stub, and a parasitic stub. The first conductive stub has a first feed point and is used to support a first frequency band. A first gap is provided between the first conductive stub and the second conductive stub, and the second conductive stub has a second feed point and is used to support the first frequency band. A second gap is provided between the parasitic stub and the first conductive stub. The feed module includes a first feed circuit and a second feed circuit. The first feed circuit is connected to the first feed point and is configured to feed a first current signal to the first conductive stub through the first feed point, so that the first conductive stub radiates a signal of the first frequency band. When the first conductive stub radiates a signal of the first frequency band, it couples with the parasitic stub so that the parasitic stub and the first conductive stub jointly radiate a signal of the first frequency band. The second feed circuit is connected to the second feed point and is configured to feed a second current signal to the second conductive stub via the second feed point so that the second conductive stub radiates a signal of the first frequency band.

[0025] The aforementioned antenna device incorporates parasitic stubs spaced apart from the first conductive stub. When the first conductive stub radiates a signal in the first frequency band, the radiated energy couples with the parasitic stub through the second gap, allowing both the parasitic stub and the first conductive stub to radiate the first frequency band signal. This enables the excitation current to flow towards the parasitic stub, while the current on the first conductive stub is relatively concentrated near the parasitic stub. Conversely, the current on the first conductive stub near the second conductive stub is relatively weaker. Therefore, when radiating the first frequency band signal, the parasitic stub improves the electric field distribution of the first conductive stub, concentrating the current energy relatively away from the second conductive stub. This results in better isolation between the first and second conductive stubs, higher radiation efficiency for both the first conductive stub and the parasitic stub, and the antenna device as a whole does not require excessive wiring space.

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0027] Please see Figure 1This application provides an antenna device 100, which includes an antenna body 10 and a feed module 30 connected to the antenna body 10. The antenna body 10 is used to receive and radiate radio frequency signals, and the feed module 30 is used to feed a current signal to the antenna body 10, enabling the antenna body 10 to resonate and radiate radio frequency signals. The feed module 30 is adapted to be connected to the motherboard of an electronic device and can be controlled by the motherboard of the electronic device.

[0028] The antenna body 10 is used to transmit and / or receive signals in at least one operating frequency band, such as Long Term Evolution (LTE) signals. The operating frequency band of the signal radiated by the antenna body 10 may include at least one LTE frequency band, such as B1 band (1.92GHz-2.17GHz), B3 band (1.71GHz-1.88GHz), B2 band (1.85GHz-1.99GHz), B5 band (0.824GHz-0.894GHz), B8 band (0.88GHz-0.96GHz), B20 band (0.791GHz-0.862GHz), B28 band (0.703GHz-0.803GHz), B40 band (2.30GHz-2.40GHz), B41 band (2.496GHz-2.690GHz), etc. The signal radiated by the antenna body 10 can also be a New Radio (NR) signal, and its operating frequency band can also include at least one NR band, such as the N1 band (1.92GHz-2.17GHz), the N2 band (1.85GHz-1.99GHz), etc. In the embodiments of this application, the frequency band supported by the antenna body 10 covers at least one of the above-mentioned operating frequency bands. For example, the frequency band range supported by the antenna body 10 can cover the frequency band range of multiple operating frequency bands, such as covering the frequency band ranges of B41 / N41, B40 / N40, and B5 / N5. Then the antenna body 10 can transmit and / or receive signals of the B41 / N41, B40 / N40, or B5 / N5 frequency bands.

[0029] In this embodiment, the antenna body 10 includes a first conductive stub 14, a second conductive stub 16, and a parasitic stub 18. The first conductive stub 14 and the second conductive stub 16 are spaced apart, with a first gap 12 between them. The parasitic stub 18 and the first conductive stub 14 are spaced apart, with a second gap 19 between them. It should be understood that, in some embodiments, the first gap 12 and the second gap 19 may be gaps formed on the antenna body 10. For example, during the fabrication of the antenna body 10, the first gap 12 and the second gap 19 are formed on the substrate of the antenna body 10 by processes such as cutting and stamping to divide the antenna body 10 into a first conductive branch 14, a second conductive branch 16, and a parasitic branch 18. In other embodiments, the first gap 12 and the second gap 19 may be assembly gaps of the antenna body 10. For example, the antenna body 10 is assembled from the first conductive branch 14, the second conductive branch 16, and the parasitic branch 18, and the first conductive branch 14 and the second conductive branch 16 are assembled from the first conductive branch 14 and the second conductive branch 16. When the parasitic branch 18 and the first conductive branch 14 are assembled, they are spaced apart by a predetermined distance. Therefore, the space between the first conductive branch 14 and the second conductive branch 16 forms the first gap 12. When the parasitic branch 18 and the first conductive branch 14 are assembled, they are spaced apart by a predetermined distance. Therefore, the space between the parasitic branch 18 and the first conductive branch 146 forms the second gap 19. The embodiments of this application do not limit the forming method of the first gap 12 and the second gap 19, but ensure that the first gap 12 and the second gap 19 are gaps provided on the antenna body 10, so that at least a portion of the structure of the first conductive branch 14 and the second conductive branch 16 are spaced apart, and at least a portion of the structure of the parasitic branch 18 and the first conductive branch 14 are spaced apart.

[0030] In some embodiments, the antenna body 10 is provided with at least two slots (e.g., one, two, or more first slots 12, and one, two, or more second slots 19), at least one of which divides the antenna body 10 into at least a first conductive stub 14, a second conductive stub 16, and a parasitic stub 18. In some embodiments, the first slots 12 and second slots 19 are part of the antenna device 100, and the first slots 12 and second slots 19 can be understood as gaps that can divide the antenna body 10 into at least three conductive stubs. Exemplarily, two slots are used to divide the antenna body 10 into the first conductive stub 14, the second conductive stub 16, and the parasitic stub 18. When the number of slots is N, the antenna body 10 can be divided into N+1 conductive stubs. In some embodiments, the first slot 12 and / or the second slot 19 may be filled with air, plastic, and / or other media. The shape of the first slot 12 and / or the second slot 19 may be straight or may have one or more curved shapes. It should be noted that the first slot 12 and / or the second slot 19 can be disposed at any position on the antenna body 10. In the embodiments of this application, there are no further limitations on the shape, size, number, or position of the first slot 12 and / or the second slot 19 on the antenna body 10.

[0031] In this embodiment, the first conductive stub 14 is used to support a signal in the first frequency band. Specifically, the first conductive stub 14 includes a first body 141 and a first feed point 143 disposed on the first body 141. The first feed point 143 is used to connect to the feed module 30 so that the first body 141 can radiate a first radio frequency signal when a current signal is fed into the feed module 30. The first radio frequency signal includes at least a signal in the first frequency band. Further, the first feed point 143 is disposed on the first body 141 at a position relatively close to the second gap 19, that is, the distance between the first feed point 143 and the second gap 19 is greater than the distance between the first feed point 143 and the first gap 12. The first body 141 is divided into two radiating segments based on the first feed point 143, and both radiating segments can resonate and radiate the first radio frequency signal. Specifically, the first body 141 may include a first radiating part 1411 and a second radiating part 1413, and the length of the first radiating part 1411 is greater than the length of the second radiating part 1413. A first radiating section 1411 is formed between a first feed point 143 and a first slot 12, and the balanced mode of the first radiating section 1411 is used to support a first frequency band. A second radiating section 1413 is formed between the first feed point 143 and a second slot 19, and the low-order modes of the second radiating section 1413 and the low-order modes of the parasitic stub 18 are used to support the first frequency band.

[0032] In some embodiments, the first conductive stub 14 is also used to support a second frequency band, the second frequency band having a different frequency range than the first frequency band. Therefore, the first conductive stub 14 can support multiple frequency bands, widening the operating bandwidth of the antenna device 100. It should be understood that in the embodiments of this application, "different" frequency bands refer to two frequency bands having different frequency ranges. For example, the frequency ranges of the two frequency bands can be completely different (e.g., they have no overlap), or the frequency ranges of the two frequency bands can partially overlap (e.g., there is an overlap, and at least a portion of the frequencies of one frequency band are within the range of the other frequency band). In some embodiments, the frequency ranges of the first frequency band and the second frequency band can be not completely identical, or completely different. For example, the frequency ranges of the first frequency band and the second frequency band can have no overlap at all, or their frequency ranges can partially overlap.

[0033] In this embodiment, the center frequency of the first frequency band is greater than the center frequency of the second frequency band. For example, the first frequency band can be higher than the second frequency band, or the center frequency of the first frequency band is higher than the center frequency of the second frequency band. It should be understood that "the first frequency band is higher than the second frequency band" means that the frequency range of the first frequency band is higher than the frequency range of the second frequency band, for example, the lowest frequency of the first frequency band is higher than the highest frequency of the second frequency band. In some embodiments, the first frequency band can be a high-frequency band, for example, the first frequency band can include at least one of the B41 and B40 frequency bands mentioned above, or the first frequency band can be a mid-frequency band, for example, the first frequency band can include at least one of the B1 and B3 frequency bands mentioned above; the second frequency band can be a low-frequency band, for example, the second frequency band can include at least one of the B5, B8, B20, and B28 frequency bands mentioned above. It should be understood that the first frequency band in the embodiments of this application should not be strictly limited to a high-frequency band or a mid-frequency band. For example, the first frequency band may cover a high-frequency band or a mid-frequency band, or the center frequency of the first frequency band may be within the frequency band of a high-frequency band or a mid-frequency band (e.g., the center frequency of a sub-band of the first frequency band is within 1.7-2.7 GHz), or the first frequency band may have overlapping frequency band ranges with the high-frequency band or a mid-frequency band. This means that the upper limit of the frequency band range of the first frequency band may be slightly offset relative to the upper limit of the high-frequency band or a mid-frequency band (e.g., the upper limit of the frequency band range of the first frequency band may be slightly greater than or slightly less than the upper limit of the high-frequency band or a mid-frequency band), and the lower limit of the frequency band range of the first frequency band may be slightly offset relative to the lower limit of the high-frequency band or a mid-frequency band (e.g., the lower limit of the frequency band range of the first frequency band may be slightly greater than or slightly less than the lower limit of the high-frequency band or a mid-frequency band). Similarly, the second frequency band should not be strictly limited to the low frequency band. For example, the second frequency band can cover the low frequency band, or the center frequency of the second frequency band is within the frequency band of the low frequency band (such as the center frequency of the sub-band of the second frequency band being between 0.703 GHz and 0.894 GHz).

[0034] In some embodiments, the first conductive stub 14 further includes a first grounding point 145, which is connected to the first body 141 and used for grounding. Specifically, the first grounding point 145 is disposed between the first feed point 143 and the second gap 19. In this embodiment, the position of the first grounding point 145 on the first conductive stub 14 is adjacent to the first feed point 143, so that the first conductive stub 14 roughly forms an IFA (Inverted-F Antenna) antenna structure, which enables better impedance matching of the first conductive stub 14, and its small size, simple structure, and lower manufacturing cost.

[0035] In this embodiment, the second conductive stub 16 can also be used to support the signal of the first frequency band, so that the antenna device 100 has better radiation performance in the first frequency band. Specifically, the second conductive stub 16 includes a second body 161 and a second feed point 163 disposed on the second body 161. The second feed point 163 is used to connect to the feed module 30, so that the second body 161 can radiate a second radio frequency signal when the feed module 30 feeds in a current signal. The second radio frequency signal includes at least the signal of the first frequency band. In some embodiments, the second conductive stub 16 also includes a second ground point 165, which is disposed on the second body 161 and used for grounding. Further, in this embodiment, the length of the second conductive stub 16 is less than the length of the first conductive stub 14, so that the second conductive stub 16 and the first conductive stub 14 can be used to radiate radio frequency signals of different frequency bands respectively.

[0036] In some embodiments, the second conductive stub 16 is also used to support a third frequency band, which is different from the first frequency band. The third frequency band can be higher than the first frequency band. That is, the second conductive stub 16 can be used to support both the first and third frequency bands simultaneously, making the second conductive stub 16 a multi-frequency antenna. Therefore, the operating bandwidth of the antenna device 100 is relatively wide. "The third frequency band is lower than the first frequency band" means that the frequency range of the third frequency band is lower than the frequency range of the first frequency band. For example, the highest frequency of the third frequency band is lower than the lowest frequency of the first frequency band. Further, the center frequency of the third frequency band can be lower than the center frequency of the first frequency band. For example, the first frequency band is a high-frequency band, and the third frequency band is a mid-frequency band. Specifically, the first frequency band may include at least one of the above-mentioned B41 and B40 frequency bands, and the third frequency band may include at least one of the above-mentioned B1 and B3 frequency bands. It should be understood that the first frequency band in this embodiment should not be strictly limited to a high-frequency band. For example, the first frequency band may cover a high-frequency band, or the center frequency of the first frequency band may be within the frequency band of a high-frequency band (e.g., the center frequency of the first frequency band is between 2.4 GHz and 2.7 GHz). The third frequency band should not be strictly limited to a mid-frequency band. For example, the third frequency band may cover a mid-frequency band, or the center frequency of the third frequency band may be within the frequency band of a mid-frequency band (e.g., the center frequency of the third frequency band is between 1.7 GHz and 2.4 GHz).

[0037] In this embodiment, the parasitic stub 18 is used to support the signal of the first frequency band and is spaced apart from the first conductive stub 14. The parasitic stub 18 may not have any grounding point or any feed point. Under the excitation of the feed module 30, the energy of the first conductive stub 14 can be coupled to the parasitic stub 18 through the second gap 19, so that the parasitic stub 18 and the first conductive stub 14 jointly radiate the signal of the first frequency band, resulting in relatively high radiation efficiency. To ensure the efficiency of energy coupling, the width of the second gap 19 can be greater than or equal to 0.8 mm and less than or equal to 2.5 mm. For example, the width of the second gap 19 can be 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.5 mm, etc. The specific positional relationship between the parasitic branch 18 and the first conductive branch 14 can vary. For example, in this embodiment, the parasitic branch 18 can be located at the end of the first conductive branch 14 away from the second conductive branch 16, and on the extension path of the first conductive branch 14, so that the first gap 12 and the second gap 19 are located at opposite ends of the first conductive branch 14, respectively. In other embodiments, the parasitic branch 18 can deviate from the extension path of the first conductive branch 14. For example, the extension paths of the parasitic branch 18 and the first conductive branch 14 can be approximately in the same direction, but the parasitic branch 18 and the first conductive branch 14 are arranged side by side, so that the second gap 19 and the first gap 12 are located at two adjacent sides of the first conductive branch 14, respectively.

[0038] In some examples, the extension direction of the parasitic branch 18 may be different from or the same as the extension direction of the first conductive branch 14. For example, the extension direction of the parasitic branch 18 may be different from the extension direction of the first conductive branch 14, where the first conductive branch 14 may extend mainly along a first direction, and the parasitic branch 18 may extend mainly along a second direction, where the first and second directions intersect (e.g., they are perpendicular to each other). Alternatively, the extension direction of the parasitic branch 18 may be the same as the extension direction of a portion of the structure of the first conductive branch 14, where the first conductive branch 14 itself may have a bent extension feature, wherein the first radiating portion 1411 may extend along the first direction, and the second radiating portion 1413 is connected to the end of the first radiating portion 1411 and bent relative to the first radiating portion 1411 to extend along the second direction, where the first and second directions intersect (e.g., they are perpendicular to each other). In this case, the parasitic branch 18 may be spaced apart from the end of the second radiating portion 1413 away from the first radiating portion 1411, and the parasitic branch 18 may be arranged to extend along the second direction. For example, the extension direction of the parasitic branch 18 can be the same as the extension direction of the first conductive branch 14. Both the first conductive branch 14 and the parasitic branch 18 can extend mainly along the first direction. In this specification, the "extension direction" of the conductive branch or radiator can be understood as the directional trend of the extension of the radiator or conductive branch. Its direction is defined by the structure of the conductive branch or radiator itself. For example, the first radiating part 1411, the second radiating part 1413, and the parasitic branch 18 are arranged sequentially along the same direction, so that the extension direction of the parasitic branch 18 is the same as that of the first conductive branch 14, thereby increasing the coupling area and improving the energy coupling efficiency.

[0039] The power supply module 30 includes a first power supply circuit 32 and a second power supply circuit 34. The first power supply circuit 32 feeds a first current signal to the first conductive stub 14 via a first power supply point 143, causing the first radiating part 1411 on the first conductive stub 14 to radiate a first radio frequency (RF) signal, and the second radiating part 1413 and the parasitic stub 18 to jointly radiate the first RF signal. The second power supply circuit 34 feeds a second current signal to the second conductive stub 16 via a second power supply point 163, causing the second body 161 on the second conductive stub 16 to radiate a second RF signal. As described above, the first RF signal includes at least a signal in a first frequency band, and the second RF signal also includes at least a signal in the first frequency band.

[0040] Furthermore, to support the aforementioned first frequency band, the first conductive stub 14 and the second conductive stub 16 are respectively configured to operate in corresponding resonant modes. For example, the first conductive stub 14 can operate in the first resonant mode, and the second conductive stub 16 can operate in the second resonant mode, wherein the first resonant mode indicates that the first conductive stub 14 generates resonance in the first frequency band, and the second resonant mode indicates that the second conductive stub 16 generates resonance in the first frequency band.

[0041] Specifically, a first current path is formed on the first conductive stub 14 by current excitation. For example, the first radiating portion 1411 of the first conductive stub 14 forms the first current path. The balanced mode or higher-order mode of the first current path is used to form a first resonant mode to radiate a signal in the first frequency band. For example, the first radiating portion 1411 has a suitable equivalent electrical length so that the first current path can form a resonance of 1 / 2 wavelength mode in the first frequency band, or a resonance of 3 / 4 wavelength mode in the first frequency band, or a resonance of 5 / 8 wavelength mode in the first frequency band, or a resonance of 5 / 4 wavelength mode in the first frequency band (i.e., the first resonant mode). Here, the first frequency band can be a high-frequency band.

[0042] Furthermore, a second current path can be formed on the first conductive stub 14 by current excitation. For example, the second radiating portion 1413 of the first conductive stub 14 forms the second current path. The fundamental mode of the second current path is used to form a second resonant mode to radiate signals in the first frequency band. Simultaneously, the current in the second current path couples energy to the parasitic stub 18 through the second gap 19, thereby forming a third current path on the parasitic stub 18. The fundamental mode of the third current path is used to form a third resonant mode to radiate signals in the first frequency band. In the embodiments of this application, the parasitic stub 18 can be configured with a suitable equivalent electrical length so that the parasitic stub 18 can operate in the aforementioned third resonant mode without the need for additional impedance elements. For example, the physical length of the parasitic stub 18 can be designed within a suitable range to configure the equivalent electrical length of the parasitic stub 18. Specifically, the physical length of the parasitic stub 18 can be equal to one-half, three-quarters, or four-fifths of the wavelength of the first frequency band, thus the third resonant mode is the corresponding 1 / 4 wavelength mode, 3 / 4 wavelength mode, or 3 / 4 wavelength mode. Alternatively, the equivalent electrical length of the parasitic stub 18 can be configured by introducing suitable impedance elements into the circuit of the parasitic stub 18; this will not be elaborated upon further in this specification. As an example, the physical length of the parasitic stub 18 can range from 10mm to 25mm (including the endpoints), for example, the physical length of the parasitic stub 18 is 15mm.

[0043] Further, please refer to Figure 2 In this embodiment, in order to ensure that the first conductive stub 14 can couple with the parasitic stub 18 to jointly support the signal of the first frequency band, the antenna device 100 may further include a first frequency band switching module 50. One end of the first frequency band switching module 50 is grounded and the other end is connected to the first conductive stub 14. The first frequency band switching module 50 is configured to be connected to the circuit of the antenna device 100 using different impedance elements so that the first conductive stub 14 can couple with the parasitic stub 18 to jointly support the signal of the first frequency band.

[0044] Specifically, one end of the first frequency band switching module 50 is grounded, and the other end is connected to the first radiator 1411 of the first conductive stub 14. The connection node between the first frequency band switching module 50 and the first radiator 1411 is located between the first feed point 143 and the first gap 12. Please refer to... Figure 3 In this embodiment, the first frequency band switching module 50 includes a first switch module 52 and at least two first frequency band selection branches 54 connected in parallel. The first switch module 52 is connected to the at least two first frequency band selection branches 54. The frequency band switching module 50 is configured to selectively connect at least one of the at least two first frequency band selection branches 54 into the loop of the first conductive stub 143 through the first switch module 52, so that the first conductive stub 143 can radiate signals of the first frequency band.

[0045] The antenna device 100 described above equips the first conductive stub 14 with a first frequency band switching module 50, and connects at least one of the at least two first frequency band selection branches 54 to the circuit of the first conductive stub 14 via a first switching module 52. This allows the impedance matching of the first conductive stub 14 to be adjusted using different first frequency band selection branches 54, enabling the first conductive stub 14 to operate in different frequency bands (such as multiple sub-bands of the first frequency band, or the first and second frequency bands). This broadens the operating frequency band of the first conductive stub 14 and avoids the need to add new conductive stubs to increase different frequency bands, thus reducing the cost and space required for the antenna device 100. Furthermore, the antenna device 100 grounds one end of the first frequency band switching module 50 and directly connects the other end to the first conductive stub 14. Different first frequency band selection branches 54 can be selectively connected in parallel to the circuit, allowing for the implementation of more operating frequency bands and achieving higher frequency modulation stability by utilizing different connection states of the first frequency band selection branches 54.

[0046] Please see Figure 3In this embodiment, at least two first frequency band selection branches 54 include a first branch 541, a second branch 543, and a third branch 545. One end of the first branch 541 is grounded, and the other end is connected to the first body 141. The second branch 543 and the third branch 545 are connected in parallel with the first branch 541. The first branch 541, the second branch 543, and the third branch 545 are provided with impedance elements with different impedance values ​​to change the impedance of the circuit when the circuit of the first conductive stub 14 is connected, thereby adjusting the first conductive stub 14 to a suitable impedance match to radiate the first radio frequency signal of the desired frequency band. In some embodiments, the first branch 541 includes a first inductor L1, the second branch 543 includes a second inductor L2, and the third branch 545 includes a third inductor L3. The first inductor L1, the second inductor L2, and the third inductor L2 are connected in parallel with each other, and all three are controlled by the first switching module 52. The inductance values ​​of the first inductor L1, the second inductor L2, and the third inductor L3 are all different. The first switching module 52 selectively connects the first inductor L1 and / or the second inductor L2 and / or the third inductor L3 to the circuit of the first conductive stub 14. The inductance values ​​of the first inductor L1, the second inductor L2, and the third inductor L3 can be set according to the specific operating frequency band of the first radio frequency signal, and this embodiment of the application does not limit this. As an example, the first inductor L1, the second inductor L2, and the third inductor L3 are mainly used to switch different sub-frequency bands of the second frequency band.

[0047] In this embodiment, the first frequency band switching module 50 further includes a tuning capacitor C0, which is connected in parallel across at least two first frequency band selection branches 54 and is controlled by the first switching module 52. The tuning capacitor C0 is used to shift the operating frequency band of the loop mode to a lower level, that is, to ensure that the operating frequency band of the first conductive stub 14 deviates from the operating frequency band of the second conductive stub 14, so as to avoid mutual interference of signals and thus ensure high radiation efficiency. For example, when the second conductive stub 16 operates in the first and third frequency bands (mid-frequency band and high-frequency band), the tuning capacitor C0 is connected to the loop of the first conductive stub 14 so that the first conductive stub 14 operates in the second frequency band (low-frequency band). At this time, the signals radiated by the first conductive stub 14 and the second conductive stub 16 do not interfere with each other and the radiation efficiency is high.

[0048] In this embodiment, the first switch module 52 is connected to the first frequency band selection branch 54 and is used to control the on / off state of each first frequency band selection branch 54 and the branch where the tuning capacitor C0 is located. The first switch module 52 can be connected between the first frequency band selection branch 54 and the first radiating part 1141, or it can be connected between the first frequency band selection branch 54 and the reference ground terminal. In this embodiment, the first switch module 52 includes at least two switches, and the at least two switches are configured in a one-to-one correspondence with at least two first frequency band selection branches 54 and tuning capacitors C0. Each switch is connected to a corresponding first frequency band selection branch 54 or a corresponding tuning capacitor C0 to control the on / off state of the corresponding first frequency band selection branch 54 or the branch where the corresponding tuning capacitor C0 is located. Specifically... Figure 4 In the illustrated embodiment, the first switch module 52 may include a first switch K1, a second switch K2, a third switch K3, and a fourth switch K4. The first branch 541 is grounded through the first switch K1, the second branch 543 is grounded through the second switch K2, the third branch 545 is grounded through the third switch K3, and the tuning capacitor C0 is grounded through the fourth switch K4. In this embodiment, each switch may be a single-pole single-throw switch or an electronic switching transistor, etc. The electronic switching transistor may be a MOSFET, a transistor, etc. In this embodiment, the specific components of the first switch module 52 are not further limited, as long as they meet the on / off control conditions for the multiple first frequency band selection branches 54 and the branch containing the tuning capacitor C0.

[0049] Further, please refer to Figure 5 In some embodiments, in order to ensure that the second conductive stub 16 can support the first frequency band and the third frequency band, the antenna device 100 may further include a second frequency band switching module 70. One end of the second frequency band switching module 70 is grounded and the other end is connected to the first conductive stub 14. The second frequency band switching module 70 is configured to be connected to the loop of the antenna device 100 using different impedance elements so that the second conductive stub 16 can support the first frequency band and the third frequency band.

[0050] Specifically, one end of the second frequency band switching module 70 is grounded, and the other end is connected to the first radiator 1411 of the first conductive stub 14. The connection node between the second frequency band switching module 70 and the first radiator 1411 is located between the connection node of the first frequency band switching module 70 and the first radiator 1411 and the first gap 12. That is, the distance between the connection node of the second frequency band switching module 70 on the first radiator 1411 and the first gap 12 is less than the distance between the connection node of the second frequency band switching module 70 on the first radiator 1411 and the second gap 19. As an example, the distance between the connection node of the second frequency band switching module 70 on the first radiator 1411 and the first gap 12 can be in the range of 10mm to 20mm (including the endpoint). The first radiator 1411 is configured such that, under the tuning of the second frequency band switching module 70, its energy can be coupled to the second conductive stub 16 through the first gap 12 to achieve tuning of the intermediate frequency and high frequency radio frequency signals of the second conductive stub 16. To ensure the efficiency of energy coupling, the width of the first slit 12 can be greater than or equal to 0.8 mm and less than or equal to 2.5 mm. For example, the width of the second slit 19 can be 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.5 mm, etc.

[0051] Please see Figure 6 In this embodiment, the second frequency band switching module 70 includes a second switch module 72 and at least two second frequency band selection branches 74 connected in parallel. The second switch module 72 is connected to the at least two second frequency band selection branches 74. The second frequency band switching module 70 is configured to selectively connect at least one of the at least two second frequency band selection branches 74 into the loop of the first conductive stub 14 through the second switch module 72, so that the second conductive stub 16 can radiate signals of the first frequency band or the third frequency band through energy coupling.

[0052] Please see Figure 7In this embodiment, at least two second frequency band selection branches 74 include a fourth branch 741, a fifth branch 743, and a sixth branch 745. One end of the fourth branch 741 is grounded, and the other end is connected to the first body 141. The fifth branch 743 and the sixth branch 745 are connected in parallel with the second branch 741, respectively. The fourth branch 741, the fifth branch 743, and the sixth branch 745 are provided with impedance elements with different impedance values ​​to change the impedance of the circuit when the first conductive stub 14 is connected, thereby adjusting the second conductive stub 14 to a suitable impedance match to radiate the second radio frequency signal of the desired frequency band. In some embodiments, the fourth branch 741 includes a first capacitor C1, the fifth branch 743 includes a second capacitor C2, and the sixth branch 745 includes a third capacitor C3. The first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in parallel with each other, and all three are controlled by the second switching module 72. The capacitances of the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all different. The second switch module 72 selectively connects the second capacitor C1 and / or the second capacitor C2 and / or the third capacitor C3 to the circuit of the first conductive stub 14. The capacitances of the first capacitor C1, the second capacitor C2, and the third capacitor C3 can be set according to the specific operating frequency band of the second radio frequency signal, and this embodiment does not limit this. As an example, the capacitance values ​​of the first capacitor C1, the second capacitor C2, and the third capacitor C3 can each range from 0.7pF to 1.8pF (inclusive).

[0053] In this embodiment, the second switch module 72 is connected to the second frequency band selection branch 74 and is used to control the on / off state of each second frequency band selection branch 74. The second switch module 72 can be connected between the second frequency band selection branch 74 and the first radiating part 1141, or it can be connected between the second frequency band selection branch 74 and the reference ground terminal. In this embodiment, the second switch module 72 includes at least two switches, each corresponding to one of the at least two second frequency band selection branches 74. Each switch is connected to a corresponding second frequency band selection branch 74 to control the on / off state of the corresponding second frequency band selection branch 74. Specifically... Figure 7In the illustrated embodiment, the second switch module 72 may include a fifth switch K5, a sixth switch K6, a seventh switch K7, and an eighth switch K8. The fourth branch 741 is grounded to the first radiating section 1411 via the fifth switch K5, the fifth branch 743 is grounded via the sixth switch K6, the sixth branch 745 is grounded via the seventh switch K7, and the fourth inductor L4 is grounded via the eighth switch K4. In this embodiment, each switch may be a single-pole single-throw switch or an electronic switching transistor, etc. The electronic switching transistor may be a MOSFET, a transistor, etc. In this embodiment, the specific components of the second switch module 72 are not further limited, as long as they meet the on / off control conditions for multiple second frequency band selection branches 74. In this embodiment, when the fourth switch K4 and the fifth switch K5 are closed simultaneously, the first conductive stub 14 and the second conductive stub 16 can be activated to operate in the first frequency band, for example, in the B41 frequency band.

[0054] In some embodiments, the second frequency band switching module 70 may further include a voltage divider circuit 60, which is controlled by the second switching module 72. The voltage divider circuit 60 is used to divide the voltage of the circuit of the second frequency band switching module 70 to improve the circuit's withstand voltage and avoid adverse effects on the circuit caused by the low withstand voltage of the second switching module 72. Further, the first terminal of the voltage divider circuit 60 is grounded, and the second terminal is connected to the circuit of the frequency band switching module 50. For example, in some embodiments, the voltage divider circuit 60 is connected in parallel across the two ends of the second frequency band selection branch 74.

[0055] Specifically Figure 7 In the illustrated embodiment, the voltage divider circuit 60 may include components such as resistors and / or inductors. In this embodiment, the voltage divider circuit 60 includes a fourth inductor L4 and a fifth inductor L5. The fourth inductor L4 is connected in parallel with the second frequency band selection branch 74. For example, the fourth inductor L4 is connected to the second switching module 72 and is connected in parallel across one of the second frequency band selection branches 74. One end of the fifth inductor L5 is grounded, and the other end is connected to the common connection point of one of the fourth inductors L4 and the second switching module 74. It should be understood that in this embodiment, "common connection point" should be understood as a common connection point of the circuit, which is not limited to a physical node, but rather should be understood as a point on the circuit with approximately the same potential. When the second switching module 72 controls the parallel branch where the fourth inductor L4 is located to disconnect, the fourth inductor L4 and the fifth inductor L5 are connected in series and then grounded. In this embodiment, the inductance of the fourth inductor L4 or the fifth inductor L5 is greater than or equal to 30nH to improve the withstand voltage of the second frequency band switching module 70.

[0056] In some embodiments, one end of the fifth inductor L5 can be connected to the common connection point of the second switching module 72 and the first radiating part 1411, and the other end can be directly grounded; in some embodiments, one end of the fifth inductor L5 can be connected to the common connection point of the second switching module 72 and the first body 141, and the other end can be connected to the common connection point of multiple second frequency band selection branches 74 at the reference ground terminal. In this case, the voltage divider circuit 60 can be considered to be connected in parallel with the second frequency band switching module 70, or the fifth inductor L5 can be connected in parallel with one of the second frequency band selection branches 74 in the second frequency band switching module 70.

[0057] Please see Figure 8 and Figure 9 , Figure 8 and Figure 9 The diagram shows grayscale simulation images of the current distribution, S-parameters, and radiation efficiency of a conventional antenna and the antenna device 100 provided in this embodiment, respectively. Figure 8 and Figure 9 Part (a) shows the current distribution, S-parameters, and radiation efficiency radiated by the conventional first conductive branch 014 of the conventional antenna device 0100 at the resonant frequency generated by the balanced mode in the B41 band. Figure 8 and Figure 9 Part (b) represents the current distribution, S-parameters, and radiation efficiency radiated by the first conductive branch 14 of the antenna device 100 provided in this application at the resonant frequency generated by the balanced mode in the B41 band.

[0058] from Figure 8 and Figure 9 As can be seen from part (a), the conventional antenna device 0100 does not have a parasitic branch configured for the conventional first conductive branch 014. In this mode, the current is mainly distributed in the conventional first radiating part 01411 of the conventional first conductive branch 014, that is, mainly distributed in the part of the conventional first conductive branch 014 close to the conventional second conductive branch (not shown in the figure). The isolation between the conventional first conductive branch 014 and the conventional second conductive branch is too poor, only -4 to -6dB, which leads to a decrease in the radiation efficiency of the conventional antenna device 0100 and affects the radiation efficiency of the conventional first conductive branch 014 and the conventional second conductive branch in the B41 band by 2-2.5dB.

[0059] from Figure 8 and Figure 9As can be seen from part (b), the antenna device 100 provided in this application embodiment introduces a parasitic branch 18 spaced apart from the first conductive branch 14. When the first conductive branch 14 radiates a signal in the B41 frequency band, the radiated energy is coupled to the parasitic branch 18 through the second gap 19, so that the parasitic branch 18 and the first conductive branch 14 jointly radiate a signal in the B14 frequency band. This allows the excitation current to flow toward the parasitic branch 18, and the current on the first conductive branch 14 can also be relatively concentrated on the part of the first conductive branch 14 near the parasitic branch 18 (i.e., the second radiating part 1413). Correspondingly, the current on the first conductive branch 14 near the second conductive branch 16 is relatively weak. Therefore, when the first conductive stub 14, the second conductive stub 16, and the parasitic stub 18 radiate signals in the B14 frequency band, the parasitic stub 18 can improve the electric field distribution of the first conductive stub 14, causing the energy of the current to concentrate in a direction relatively far away from the second conductive stub 16, resulting in relatively good isolation between the first conductive stub 14 and the second conductive stub 16 (less than -20dB), and relatively high radiation efficiency of the first conductive stub 14 and the parasitic stub 18 (1.3dB higher than that of the conventional antenna device 0100).

[0060] Please see Figure 10 This application also provides an electronic device 400, which can be, but is not limited to, a mobile phone, tablet computer, laptop computer, PDA, mobile internet device (MID), wearable device (e.g., smartwatch, smart bracelet, pedometer, etc.), or other communication device with an antenna device. The electronic device 400 in this embodiment is described using a mobile phone as an example.

[0061] The electronic device 400 includes a housing 1001 and a display screen 1003 and an antenna device 1004 disposed on the housing 1001. In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "inner," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the purpose of simplifying the description of this application. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0062] In this embodiment, the display screen 1003 typically includes a display panel, and may also include circuitry for responding to touch operations on the display panel. The display panel may be a Liquid Crystal Display (LCD), and in some embodiments, the display panel may also be a touch display screen. In the description of this specification, references to terms such as "one embodiment," "some embodiments," or "other embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Specifically, in the embodiments of this application, the housing 1001 includes a rear housing 1010 and a middle frame 1011, with the rear housing 1010 and the display screen 1003 respectively disposed on opposite sides of the middle frame 1011.

[0064] Please see Figure 11 The middle frame 1011 can be a one-piece molded structure, which can be structurally divided into a support portion 1012 and a frame 1013 surrounding the support portion 1012. It should be understood that the terms "support portion" and "frame" are merely for ease of description; the diagonal lines filling the structure in the diagram are only for differentiation and do not represent their actual structure. There may be no clear dividing line between them, and they may be two or more components assembled together. The naming of "support portion" and "frame" should not limit the structure of the middle frame 1011. The support portion 1012 supports a part of the structure of the display screen 1003, and can also support or install electronic components of the electronic device 200, such as the motherboard 1005, battery 1006, sensor module 1007, etc. The frame 1013 is connected to the periphery of the support portion 1012. Furthermore, the frame 1013 is arranged around the outer periphery of the support portion 1012 and protrudes relative to the surface of the support portion 1012, so that the two together form a space for accommodating electronic components. In this embodiment, the display screen 1013 covers the frame 1013, and the frame 1013, the back cover 1010, and the display screen 1003 together form the outer surface of the electronic device 400.

[0065] In this embodiment, the antenna device 1004 can be any of the antenna devices 100 provided in the above embodiments, or a combination of any one or more features of the antenna devices 100. Related features can be referred to in the foregoing embodiments, and will not be repeated here. The antenna device 1004 is integrated into the housing 1001. For example, the antenna device 1004 can be disposed in the middle frame 1011 or in the rear housing 1010; this specification does not limit this. Similar to the aforementioned antenna device 100, the antenna device 1004 in this embodiment can include an antenna body 10 and a feed module 30 connected to the antenna body 10. The antenna body 10 can include a first conductive stub 14, a second conductive stub 16, and a parasitic stub 18. The antenna body 10 is disposed in the middle frame 1011. The feed module 30 can be connected to the main board 1005. The first grounding point 145 and the second grounding point 165 can be connected to at least one of the main board 1005, the carrier portion 1012, and the rear housing 1010. In some embodiments of this application, the antenna body 10 can be an LDS antenna formed on an antenna support using laser engraving technology. For example, an antenna support can be first set on the frame 1013 of the electronic device 400, and then an LDS antenna can be formed on the antenna support. Here, an LDS antenna refers to a metal antenna pattern directly plated onto the antenna support using laser engraving technology. In other embodiments, the antenna body 10 can also be a flexible printed circuit (FPC) antenna set on the frame 1013 of the electronic device 400. Here, an FPC antenna refers to a metal antenna pattern formed on an FPC, and the FPC antenna can be fixed to the frame of the electronic device by bonding, embedding, soldering, or other methods. In still other embodiments, the antenna body 10 can also be a metal patch antenna attached to the frame 1013 of the electronic device 400, or the antenna body / conductive stub can be directly formed using the metal frame of the electronic device.

[0066] Furthermore, in Figure 11 In the illustrated embodiment, the frame 1013 is made of metal, such as aluminum alloy or magnesium alloy. The antenna device 1004 is integrated into the frame 1013. In this embodiment, the frame 1013 has a first gap 1014 and a second gap 1016. The first gap 1014 and the second gap 1016 communicate with the outside and divide the frame 1013 into at least three parts. The antenna device 1004 is integrated into at least one part of the frame 1013. The first gap 1014 is the first gap 12 in the above embodiment. Thus, using the metal frame 1013 as part of the radiator of the antenna device 1004 helps save space within the electronic device 400 and provides a larger clearance area for the antenna device 1004, which helps ensure higher radiation efficiency.

[0067] In this embodiment, a gap is provided between the portion of the frame 1013 that serves as the antenna body 10 and the support portion 1013. This gap communicates with the first slot 1014, causing the first grounding point 16 of the radiator 12 to be spaced apart from the support portion 1012, thereby preventing the support portion 1012 from affecting the resonant frequency of the radiator 12. Furthermore, an unshielded body (not shown in the figure) may be provided in the first slot 1014 and the second slot 1016. The unshielded body is made of non-metallic material (e.g., resin) and has the characteristic of transmitting electromagnetic wave signals, allowing the antenna device 1004 to transmit signals. The outer surface of the unshielded body is flush with the outer surface of the frame 1013 to ensure the integrity of the appearance of the electronic device 400.

[0068] In some other embodiments, the frame 1013 may be made of non-metallic material, and the antenna device 100 may be integrated into the frame 1013. For example, the frame 1013 may be made of materials such as plastic or resin, and the antenna body 10 of the antenna device 100 may be integrated into the frame 1013 by insert molding (e.g., the antenna body 10 is entirely embedded inside the frame 1013), or it may be integrated into the frame 1013 by attachment (e.g., the antenna body 10 is attached to the surface of the frame 1013).

[0069] In some embodiments, the frame 1013 can be a rounded rectangular frame, wherein the frame 1013 may include a first frame and a third frame, and a second frame and a fourth frame, which are disposed opposite to each other, wherein the second frame is connected to the first frame and the third frame, respectively. The first frame can be understood as the top frame of the electronic device 400, the third frame as the bottom frame of the electronic device 400, and the second and fourth frames as the side frames of the electronic device 400. The antenna device 1004 may be partially or entirely formed by a portion of the frame 1013. Exemplarily, the antenna body 10 of the antenna device 1013 may be partially or integrated into at least one of the top frame, bottom frame, and side frame of the electronic device 400.

[0070] The antenna device and electronic device provided in this application include a first conductive stub and a second conductive stub spaced apart from each other. The first conductive stub and the second conductive stub are respectively used to support a first frequency band signal, so that the antenna device has a strong radiation capability in the first frequency band. Further, a parasitic stub spaced apart from the first conductive stub is introduced. When the first conductive stub radiates a signal in the first frequency band, the radiated energy is coupled to the parasitic stub through a second gap, so that the parasitic stub and the first conductive stub jointly radiate the signal in the first frequency band, so that the excitation current can flow towards the parasitic stub, and the current on the first conductive stub can also be relatively concentrated on the part of the first conductive stub near the parasitic stub. Correspondingly, the current on the first conductive stub near the second conductive stub is relatively weak. Therefore, when the first conductive stub, the second conductive stub, and the parasitic stub radiate signals in the first frequency band, the parasitic stub can improve the electric field distribution of the first conductive stub, causing the energy of the current to concentrate in a direction relatively far away from the second conductive stub, avoiding unnecessary mutual coupling between the first and second conductive stubs, resulting in relatively good isolation between the first and second conductive stubs, and relatively high radiation efficiency of the first conductive stub and the parasitic stub.

[0071] It should be noted that, in this application specification, when a component is considered to be "set on" another component, it can be connected to or directly set on the other component, or there may be an intermediary component (i.e., the two are indirectly connected); when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediary component, that is, the two components can be indirectly connected.

[0072] In this specification, the specific features or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, different embodiments or examples described in this specification, as well as features of different embodiments or examples, may be combined and integrated without contradiction. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An antenna device, characterized in that, Includes an antenna body and a feed module electrically connected to the antenna body; The antenna body includes: The first conductive branch has a first feed point and is used to support a first frequency band; the first conductive branch includes a first radiating part and a second radiating part. A second conductive branch, a first gap between the first conductive branch and the second conductive branch, the second conductive branch having a second feed point for supporting the first frequency band, and the first radiating portion formed between the first feed point and the first gap; and A parasitic branch is located at the end of the first conductive branch away from the second conductive branch and on the extension path of the first conductive branch; a second gap is provided between the parasitic branch and the first conductive branch, the first gap and the second gap are respectively located at opposite ends of the first conductive branch, and the parasitic branch is not provided with any grounding point; a second radiating part is formed between the first feed point and the second gap, and the distance between the first feed point and the second gap is smaller than the distance between the first feed point and the first gap; The power supply module includes a first power supply circuit and a second power supply circuit. The first feed circuit is connected to the first feed point and configured to feed a first current signal to the first conductive stub via the first feed point. A first current path is formed on the first radiating part by the excitation of the first current signal, and the balanced mode of the first current path is used to support the first frequency band. A second current path is formed on the second radiating part by the excitation of the first current signal, and the lower-order mode of the second current path is used to support the first frequency band. When the second radiating part radiates a signal of the first frequency band, it couples with the parasitic stub, thereby forming a third current path on the parasitic stub, and the fundamental mode of the third current path is used to support the first frequency band. The second feed circuit is connected to the second feed point and is configured to feed a second current signal to the second conductive stub via the second feed point so that the second conductive stub radiates a signal of the first frequency band.

2. The antenna device as claimed in claim 1, characterized in that, The first conductive stub is also used to support a second frequency band, which is different from the first frequency band.

3. The antenna device as described in claim 2, characterized in that, The first conductive branch is also provided with a first grounding point, which is located between the first feed point and the second gap, and the center frequency of the second frequency band is smaller than the center frequency of the first frequency band.

4. The antenna device as described in claim 2, characterized in that, The first frequency band is a high-frequency band or a mid-frequency band; or, The center frequency of the first frequency band is within the frequency range of 1.7-2.7 GHz; or The second frequency band is a low-frequency band; or The center frequency of the second frequency band is in the frequency range of 0.703 GHz to 0.894 GHz.

5. The antenna device as described in claim 2, characterized in that, The antenna device further includes a first frequency band switching module; one end of the first frequency band switching module is connected to the first conductive stub and the other end is grounded; the connection node between the first frequency band switching module and the first conductive stub is located between the first feed point and the first gap; the first frequency band switching module includes a first switch module and at least two frequency band selection branches, the at least two frequency band selection branches being connected in parallel. The first frequency band switching module is configured to selectively connect at least one of at least two frequency band selection branches to the loop of the first conductive stub through the first switching module, so that the first conductive stub can switchably radiate signals of different frequency bands based on the first current signal.

6. The antenna device as described in claim 5, characterized in that, The at least two frequency band selection branches include a first branch, a second branch, and a third branch. The first branch includes a first inductor, the second branch includes a second inductor, and the third branch includes a third inductor. The first inductor, the second inductor, and the third inductor are connected in parallel, and the inductance values ​​of the first inductor, the second inductor, and the third inductor are all different.

7. The antenna device as claimed in claim 5, characterized in that, The first frequency band switching module further includes a tuning capacitor, which is connected in parallel with the frequency band selection branch and is controlled by the first switching module.

8. The antenna device as described in any one of claims 1 to 7, characterized in that, The second conductive branch is also provided with a second grounding point, and the second power supply point is located between the second grounding point and the first gap. The second conductive branch is also used to support a third frequency band, the center frequency of which is less than the center frequency of the first frequency band.

9. The antenna device as claimed in claim 8, characterized in that, The first frequency band is a high-frequency band; or, The center frequency of the first frequency band is within the frequency range of 2.4-2.7 GHz; or The third frequency band is a mid-frequency band; or The center frequency of the third frequency band is within the frequency range of 1.7 GHz to 2.4 GHz.

10. The antenna device as claimed in claim 8, characterized in that, The antenna device further includes a second frequency band switching module; one end of the second frequency band switching module is connected to the first conductive stub, and the other end is grounded; the distance between the second frequency band switching module and the first gap is less than the distance between the second frequency band switching module and the second gap; The second frequency band switching module includes a second switch module and at least two second frequency band selection branches, wherein the at least two second frequency band selection branches are connected in parallel; The second frequency band switching module is configured to selectively connect at least one of at least two second frequency band selection branches to the loop of the first conductive stub via the second switching module, so that the second conductive stub can switchably radiate signals of the first frequency band and the third frequency band based on the second current signal.

11. The antenna device as claimed in claim 10, characterized in that, The at least two second frequency band selection branches include a fourth branch, a fifth branch, and a sixth branch. The fourth branch includes a first capacitor, the fifth branch includes a second capacitor, and the sixth branch includes a third capacitor. The first capacitor, the second capacitor, and the third capacitor are connected in parallel, and the capacitance values ​​of the first capacitor, the second capacitor, and the third capacitor are all different.

12. The antenna device as claimed in claim 11, characterized in that, The second frequency band switching module also includes a fourth inductor and a fifth inductor. The fourth inductor is connected in parallel with the second frequency band selection branch, and one end of the fifth inductor is grounded and the other end is connected to the branch where the fourth inductor is located.

13. An electronic device, characterized in that, The device includes a housing and an antenna device according to any one of claims 1 to 12, wherein the antenna device is integrated into the housing.

14. The electronic device as claimed in claim 13, characterized in that, The housing includes a support portion and a frame connected to the edge of the support portion. The first gap and the second gap are disposed on the frame, and the antenna body is integrated into the frame.

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