Antenna device, housing, and electronic device

Abstract

The application relates to an antenna device, a shell and an electronic device. The antenna device comprises a radiator and a feed source, the radiator comprising a first radiation part, a second radiation part, a feed part and a grounding part; the first radiation part is a bent radiation structure, the second radiation part is arranged in the bent radiation structure and is connected with the first radiation part, and the grounding part is arranged in the first radiation part; the grounding part is adapted to be grounded; the feed source is electrically connected to the feed part and is configured to feed an excitation current into the radiator, the excitation current flows through the first radiation part and the second radiation part to make the radiator radiate signals of a first frequency band and signals of a second frequency band, wherein the second frequency band is different from the first frequency band, which helps to make the overall size of the radiator smaller, thereby promoting the miniaturization of the antenna device and helping to reduce the excessive space occupied by the antenna device.

Description

Technical Field

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

[0002] Ultra-wideband (UWB) technology is a carrier-free communication technology that uses narrow, non-sinusoidal pulses in the nanosecond to microsecond range to transmit data. It boasts advantages such as low power consumption, strong penetration, and high positioning accuracy. However, current UWB antennas are relatively large, occupying a significant amount of space. Summary of the Invention

[0003] This application provides an antenna device, a housing, and an electronic device.

[0004] In a first aspect, embodiments of this application provide an antenna device, which includes a radiator and a feed source. The radiator includes a first radiating part, a second radiating part, a feed part, and a grounding part. The first radiating part is a bent radiating structure, and the second radiating part is disposed within the bent radiating structure and connected to the first radiating part. The grounding part is disposed in the first radiating part and is adapted to ground. The feed source is electrically connected to the feed part and is configured to feed an excitation current into the radiator. The excitation current flows through the first radiating part and the second radiating part to make the radiator radiate a signal in a first frequency band and a signal in a second frequency band, wherein the second frequency band is different from the first frequency band.

[0005] In some embodiments, the first radiating part includes a radiating body, a first radiating branch and a second radiating branch, a power supply part and a grounding part are both disposed on the radiating body, the first radiating branch and the second radiating branch are disposed at intervals, and the radiating body is connected to the first radiating branch and the second radiating branch; the second radiating part is disposed between the first radiating branch and the second radiating branch and is connected to the radiating body.

[0006] In some embodiments, the grounding portion includes a first grounding point and a second grounding point, which are disposed at a distance from each other on the radiating body.

[0007] In some implementations, the distance between the first grounding point and the first radiating branch is less than the distance between the second grounding point and the first radiating branch; or / and the distance between the second grounding point and the second radiating branch is less than the distance between the first grounding point and the second radiating branch.

[0008] In some embodiments, the first radiating branch, the second radiating branch, and the second radiating portion are connected to the same side of the radiating body and extend in the same direction.

[0009] In some embodiments, the length of the second radiating section protruding relative to the radiating body is less than the length of the first radiating branch protruding relative to the radiating body.

[0010] In some embodiments, the length of the first radiating branch protruding relative to the radiating body is equal to the length of the second radiating branch protruding relative to the radiating body.

[0011] In some embodiments, one side of the second radiating portion is spaced apart from the first radiating branch, and the other side of the second radiating portion is spaced apart from the second radiating branch.

[0012] In some embodiments, the distance between the second radiating part and the first radiating branch is equal to the distance between the second radiating part and the second radiating branch.

[0013] In some embodiments, the antenna device further includes a dielectric substrate and a metal ground plane, with the dielectric substrate disposed between the radiator and the metal ground plane; the dielectric substrate has conductive vias that penetrate the dielectric substrate and are correspondingly connected to the grounding portion.

[0014] In some implementations, the center frequency of the first frequency band is 6.5 GHz, and the center frequency of the second frequency band is 8 GHz.

[0015] In some embodiments, the first radiating part is configured to radiate a signal having a first linear polarization characteristic under the excitation of an excitation current, and the second radiating part is configured to radiate a signal having a second linear polarization characteristic under the excitation of an excitation current, wherein the first linear polarization characteristic is the same as the second linear polarization characteristic.

[0016] Secondly, embodiments of this application also provide a housing, the housing including a housing body and an antenna device of any of the above embodiments, the antenna device being disposed on the housing body.

[0017] Thirdly, embodiments of this application also provide an electronic device, which includes a housing and an antenna device of any of the above embodiments, the antenna device being disposed in the housing.

[0018] In the antenna device, housing, and electronic device provided in this application, the first radiating part of the antenna device is a bent radiating structure, and the second radiating part is disposed within the bent radiating structure and connected to the first radiating part. This helps to reduce the overall size of the radiator, thereby promoting the miniaturization of the antenna device and reducing the space occupied by the antenna device. Furthermore, the grounding part is disposed in the first radiating part, making the structural arrangement between the first radiating part and the grounding part more compact, which also helps to reduce the overall size of the radiator. Simultaneously, the first frequency band signal radiated by the radiator is different from the second frequency band signal, enabling dual-frequency radiation of the antenna device. Since the grounding part is disposed in the first radiating part, changing the position of the grounding part in the first radiating part helps to adjust the resonant frequency of the first radiating part to better adapt to the application scenario of the antenna device. Attached Figure Description

[0019] 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.

[0020] Figure 1 A schematic diagram of an antenna device provided in an embodiment of this application is shown.

[0021] Figure 2 It shows Figure 1 A schematic diagram of the structure of the antenna device.

[0022] Figure 3 It shows Figure 1 A schematic diagram of the structure of the antenna device.

[0023] Figure 4 It shows Figure 1 A schematic diagram of the antenna device dimensions.

[0024] Figure 5 This paper shows another structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0025] Figure 6 It shows Figure 5 A cross-sectional schematic diagram of the antenna device shown.

[0026] Figure 7 It shows Figure 6 An enlarged schematic diagram of point V of the antenna device.

[0027] Figure 8 It shows Figure 1 S-parameter curves of the antenna device

[0028] Figure 9 It shows Figure 1 The antenna efficiency curve of the antenna device.

[0029] Figure 10 It shows Figure 1 The vector current distribution diagram of the antenna device operating at 6.5 GHz.

[0030] Figure 11 It shows Figure 1 The vector current distribution diagram of the antenna device operating at 8 GHz.

[0031] Figure 12 It shows Figure 1 The antenna device operates at a radiation pattern of 6.5 GHz.

[0032] Figure 13It shows Figure 1 The antenna device operates at a polarization pattern of 6.5 GHz.

[0033] Figure 14 It shows Figure 1 The antenna device operates at an 8 GHz radiation pattern.

[0034] Figure 15 It shows Figure 1 The antenna device operates at a polarization pattern of 8 GHz.

[0035] Figure 16 A schematic diagram of the structure of an antenna device provided in another embodiment of this application is shown.

[0036] Figure 17 A schematic diagram of the structure of an antenna device provided in another embodiment of this application is shown.

[0037] Figure 18 A schematic diagram of the housing provided in an embodiment of this application is shown.

[0038] Figure 19 A schematic diagram of an electronic device provided in an embodiment of this application is shown. Detailed Implementation

[0039] 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 a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The term "electronic device" as used in embodiments of this application 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," "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.

[0041] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0042] Please see Figure 1 This application provides an antenna device 100, which is an ultra-wideband (UWB) antenna device. According to the Federal Communications Commission (FCC) regulations, UWB antennas operate in a frequency range from 3.1 GHz to 10.6 GHz, with a minimum operating bandwidth of 500 MHz. Currently, the mainstream UWB antenna frequency bands have center frequencies of 6.5 GHz and 8 GHz, requiring bandwidth of over 500 MHz: CH5: 6.25–6.75 GHz; CH9: 7.75–8.25 GHz.

[0043] Antenna device 100 includes a radiator 10 and a feed 20, the radiator 10 and the feed 20 being electrically connected, for example, the radiator 10 and the feed 20 can be electrically connected via a feed line. The feed 20 is configured to feed an excitation current into the radiator 10, enabling the radiator 10 to transmit and receive radio frequency signals in a predetermined frequency band.

[0044] Please see Figure 2The radiator 10 includes a first radiating part 12, a second radiating part 14, a feed part 16, and a grounding part 18. The first radiating part 12 is a bent radiating structure, and the second radiating part 14 is disposed within the bent radiating structure and connected to the first radiating part 12. The two present a nested structure, which helps to make the overall size of the radiator 10 smaller, thereby promoting the miniaturization of the antenna device 100 and helping to reduce the space occupied by the antenna device 100.

[0045] The power supply section 16 can serve as the access point for the radiator 18 to receive the excitation current; for example, the power supply section 16 is electrically connected to the feed source 20. In the embodiments of this application, the power supply section 16 can be disposed on the first radiator 12; or, the power supply section 16 can also be disposed on the second radiator 14; or, a portion of the structure of the power supply section 16 can be disposed on the first radiator 12, and another portion can be disposed on the second radiator 14. In this case, the power supply section 16 can be considered to be located at the connection between the first radiator 12 and the second radiator 14.

[0046] In this embodiment, the grounding part 18 is disposed on the first radiating part 12, and the grounding part 18 is adapted to be grounded, for example, the grounding part 18 can be connected to a metal floor. Figure 1 (Not shown in the image) The metal ground plane can be the grounding portion of the circuit board, and the grounding portion 18 can be electrically connected to the circuit board, making the structural arrangement between the first radiating portion 12 and the grounding portion 18 more compact, which helps to reduce the overall size of the radiator 10. The feed source 20 can be configured to transmit the excitation current to the feed portion 16, and the excitation circuit flows through the first radiating portion 12 and the second radiating portion 14 to make the radiator 10 radiate signals of the first frequency band and the second frequency band. Since the second frequency band is different from the first frequency band, it helps to realize the dual-frequency radiation of the radiator 10, so that the antenna device 100 can be used as a dual-frequency antenna. The signals of the first frequency band and the second frequency band are both UWB signals. The center frequency of the first frequency band can be lower than the center frequency of the second frequency band. The first frequency band can be a low frequency band, for example, the center frequency of the first frequency band is 6.5 GHz; the second frequency band can be a high frequency band, for example, the center frequency of the second frequency band is 8 GHz.

[0047] Furthermore, since the grounding portion 18 is located on the first radiating portion 12, compared to a case where the grounding portion is located outside the radiator (e.g., the grounding portion is located outside the radiator and surrounds it), the path of the excitation current flowing through the first radiating portion 12 can be adjusted during the manufacturing process of the radiator 10 by changing the position of the grounding portion 18 on the first radiating portion 12. This helps to adjust the resonant frequency of the first radiating portion 12 to better suit the application scenarios of the antenna device 100. The first radiating portion 12 can be U-shaped. For example, please refer to... Figure 3The first radiating part 12 may include a radiating body 122, a first radiating branch 124, and a second radiating branch 126. The first radiating branch 124 and the second radiating branch 126 are spaced apart, and the two ends of the radiating body 122 are respectively connected to the first radiating branch 124 and the second radiating branch 126. It should be understood that in this application specification, the above-mentioned names such as "radiating body," "first radiating part," "second radiating part," "first radiating branch," and "second radiating branch" are all names made for ease of description. These names should not be regarded as a limitation on the structure of the radiator 10. These names should be understood as dividing the structure of the radiator 10 for clear explanation. There may be obvious dividing lines between the structures / parts represented by these names (e.g., the radiator 10 is spliced ​​together from multiple radiating branches), or there may be no obvious dividing lines (e.g., the radiator 10 is a single integral piece).

[0048] Both the first radiating branch 124 and the second radiating branch 126 can be rectangular strips. The length of the first radiating branch 124 protruding relative to the radiating body 122 can be equal to the length of the second radiating branch 126 protruding relative to the radiating body 122. The first radiating branch 124 and the second radiating branch 126 are approximately parallel to each other. The radiating body 122 can be connected to the end of the first radiating branch 124, and the radiating body 122 can also be connected to the end of the second radiating branch 126. The first radiating branch 124 and the second radiating branch 126 can be connected to the same side of the radiating body 122, so that the radiating body 122, the first radiating branch 124, and the second radiating branch 126 can together form a bent radiating structure.

[0049] The second radiating section 14 is disposed between the first radiating branch 124 and the second radiating branch 126. The second radiating section 14 may be rectangular and may be approximately parallel to the first radiating branch 124. The second radiating section 14 may be connected to the radiating body 122. For example, the second radiating section 14, the first radiating branch 124, and the second radiating branch 126 may be connected to the same side of the radiating body 122 and extend in the same direction, so that the second radiating section 14, the first radiating branch 124, and the second radiating branch 126 are approximately parallel to each other. This not only helps the second radiating section 14 to be located within the space enclosed by the first radiating section 12, but also helps to achieve the dual-frequency radiation effect of the radiator 10.

[0050] The length of the second radiating section 14 protruding relative to the radiating body 122 can be less than the length of the first radiating branch 124 protruding relative to the radiating body 122. Thus, when the feed section 16 is disposed on the radiating body 122, for the first radiating section 12, the excitation current flows from the feed section 16 from the radiating body 122 to the first radiating branch 124; for the second radiating section 14, the excitation current flows from the feed section 16 to the second radiating section 14. This results in the excitation current path on the first radiating section 12 being longer than the current path on the second radiating section 14. The first radiating section 12 can be used for impedance matching adjustment in the low-frequency band (first frequency band), which helps the second radiating section 14 to be used for impedance matching adjustment in the high-frequency band (second frequency band), thus helping to ensure greater isolation between the first frequency band of the first radiating section 12 and the second frequency band of the second radiating section 14. Furthermore, the radiator 10 can be configured as an E-shaped planar inverted-F antenna (PIFA) structure.

[0051] The second radiating portion 14 can be spaced apart from the first radiating branch 124 and the second radiating branch 126, respectively. For example, one side of the second radiating portion 14 is spaced apart from the first radiating branch 124, and the other side of the second radiating portion 14 is spaced apart from the second radiating branch 126. The distance between the second radiating portion 14 and the first radiating branch 124 can be equal to the distance between the second radiating portion 14 and the second radiating branch 126.

[0052] It should be understood that the names “radiating part”, “main body” and “radiating branch” mentioned above in this specification are merely for ease of description and should not impose any restrictions on the specific structure of the radiator 10. Thus, the radiator 10 can be a single structure as a whole, and there may be no clear dividing line between the “radiating part”, “main body” and “radiating branch”.

[0053] When the power supply section 16 is provided in the first radiating section 12, the power supply section 16 can be provided in the radiating body 122. For example, the power supply section 16 can be located at approximately the middle position of the radiating body 122, so that the distance between the power supply section 16 and the first radiating branch 124 can be approximately equal to the distance between the power supply section 16 and the second radiating branch 126. This helps the path of the excitation circuit fed by the feed source 20 into the power supply section 16 to the first radiating branch 124 to be of equal length to the path to the second radiating branch 126.

[0054] When the power supply section 16 is provided in the second radiating section 14, the power supply section 16 can be located at approximately the middle position of the second radiating section 14, such that the distance between the power supply section 16 and the first radiating branch 124 can be approximately equal to the distance between the power supply section 16 and the second radiating branch 126.

[0055] When a portion of the power supply section 16 is disposed in the first radiating section 12 and another portion is disposed in the second radiating section 14, the power supply section 16 can be located at approximately the middle position at the connection between the radiating body 122 and the second radiating section 14, such that the distance between the power supply section 16 and the first radiating branch 124 can be approximately equal to the distance between the power supply section 16 and the second radiating branch 126.

[0056] The feed section 16 and the feed source 20 can be electrically connected using a microstrip line. Since the distributed capacitance and distributed inductance can be altered by changing the length and width of the microstrip line, this helps to increase the impedance bandwidth of the radiator 10 by positively influencing its resonant performance. Therefore, the microstrip line can serve as both a feed path and a tuning function, thereby widening the antenna's impedance bandwidth and enabling wideband operation.

[0057] A grounding portion 18 may be disposed on the radiating body 122. The grounding portion 18 may be electrically connected to a flexible printed circuit board having a metal ground plane to ground the antenna device 100. The grounding portion 18 may include a first grounding point 182 and a second grounding point 184, which are spaced apart from each other on the radiating body 122. Further, the distance between the first grounding point 182 and the first radiating stub 124 is less than the distance between the second grounding point 184 and the first radiating stub 124. The distance between the second grounding point 184 and the second radiating stub 126 is less than the distance between the first grounding point 182 and the second radiating stub 126. For example, the first grounding point 182 can be located at the end of the radiating body 122 near the first radiating branch 124, and the second grounding point 184 can be located at the end of the radiating body 122 near the second radiating branch 126. The first grounding point 182 and the second grounding point 184 help to adjust the resonant frequency of the first radiating part 12 to better adapt to the application scenario of the antenna device 100. For example, both the first grounding point 182 and the second grounding point 184 are provided with conductive vias, and conductive structures can be installed on the conductive vias of both the first grounding point 182 and the second grounding point 184 to electrically connect to the metal ground plane.

[0058] Please see Figure 4 In this embodiment, in order to obtain better resonance effect and improve signal reception and transmission efficiency, the structure of the antenna device 100 satisfies the following geometric constraints:

[0059] The length dimension L1 of the first radiating part 12 can range from 15 to 30 millimeters (including the endpoints). For example, the length dimension L1 of the first radiating part 12 can be 15 millimeters, 18 millimeters, 20 millimeters, 22 millimeters, 25 millimeters, 26 millimeters, 28 millimeters, 30 millimeters, etc. In this embodiment, the length dimension L1 of the first radiating part 12 should be understood as the dimension occupied by the radiating structure of the first radiating part 12 in the length direction.

[0060] The length dimension L2 of the second radiating part 14 can range from 8 to 18 mm (inclusive of endpoints). For example, the length dimension L2 of the second radiating part 14 can be 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, etc. In this embodiment, the length dimension L2 of the second radiating part 14 should be understood as the dimension occupied by the radiating structure of the second radiating part 14 in the length direction. When the second radiating part 14 is directly connected to the radiating body 122 (there is no gap between them), the length dimension L2 of the second radiating part 14 is also the length of the second radiating part 14 protruding relative to the radiating body 122. Further, in this embodiment, L2 <L1。

[0061] The length L3 of the first radiating branch 124 protruding relative to the radiating body 122 can range from 10 to 28 millimeters (including the endpoint value). For example, the length L3 of the first radiating branch 124 protruding relative to the radiating body 122 can be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 20 mm, 22 mm, 25 mm, 26 mm, 28 mm, etc. In this embodiment, L3 > L2, so that the second radiating part 14 cannot protrude relative to the end of the first radiating branch 124 but is completely disposed within the space enclosed by the first radiating part 12, ensuring a large isolation between the first frequency band of the first radiating part 12 and the second frequency band of the second radiating part 14.

[0062] The width dimension W1 of the first radiating part 12 can range from 12 to 25 mm (inclusive of endpoints). For example, the width dimension W1 of the first radiating part 12 can be 12 mm, 13 mm, 14 mm, 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, etc. In this embodiment, the width dimension W1 of the first radiating part 12 should be understood as the dimension occupied by the radiating structure of the first radiating part 12 in the width direction. The width dimension W1 of the first radiating part 12 is also the dimension of the radiating body 122 in this direction.

[0063] The width dimension W2 of the first radial branch 124 can range from 2 to 6 mm (including the endpoint value). For example, the width dimension W2 of the first radial branch 124 can be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, etc.

[0064] The dimensional parameters of the second radial branch 126 are the same as those of the first radial branch 124.

[0065] The width dimension W3 of the second radiating part 14 can range from 8 to 21 mm (inclusive of the endpoints). For example, the width dimension W3 of the second radiating part 14 can be 8 mm, 9 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 21 mm, etc. In this embodiment, W3 < 2 * W2.

[0066] The distance W4 between the second radiating part 14 and the first radiating branch 124 can range from 0.5 to 2 millimeters (inclusive of the endpoint value). For example, the distance W4 between the second radiating part 14 and the first radiating branch 124 can be 0.5 millimeters, 1 millimeter, 1.2 millimeters, 1.5 millimeters, 1.8 millimeters, 2 millimeters, etc. In this embodiment, W4... <W3,W4<W2。

[0067] The distance between the second radiating part 14 and the second radiating branch 126 is equal to the distance between the second radiating part 14 and the first radiating branch 124.

[0068] The grounding portion 18 can be located on one side of the first radiating portion 12. For example, the distance between the grounding portion 18 and the outer edge of the first radiating portion 12 along its length is L4. The diameter of the conductive via of the first grounding point 182 is... The value range can be 0.1-0.3 mm (inclusive of endpoint values), such as... The distance from the center of the conductive through hole of the first grounding point 182 to the outer edge of the first radiating part 12 along the length direction of the first radiating part 12 is 1-2 mm (including the endpoint value), such as 1 mm, 1.5 mm, 2 mm, etc.

[0069] The dimensions of the second grounding point 184 are the same as those of the first grounding point 182.

[0070] Based on the aforementioned geometric constraints, the radiation efficiency of the antenna device 100 can be improved. It is easy to see that the first radiating part 12 is used for impedance matching adjustment in the low-frequency band (first frequency band), and the second radiating part 14 is used for impedance matching adjustment in the high-frequency band (second frequency band).

[0071] Please see Figure 5 and Figure 6 The antenna device 100 may also include a dielectric substrate 30 and a metal ground plane 40. The dielectric substrate 30 is disposed between the metal ground plane 40 and the radiator 10. The grounding part 18 may be configured to electrically connect the antenna device 100 to the metal ground plane 40, and the metal ground plane 40 can realize the grounding of the antenna device 100.

[0072] Please see Figure 6 and Figure 7 The dielectric substrate 30 may be provided with conductive vias 32, which penetrate the dielectric substrate 30 and are correspondingly connected to the ground portion 18. The conductive vias 32 may include a first via and a second via. The first via penetrates the dielectric substrate 30 and is correspondingly connected to a first ground point 182, wherein the first via is opposite to a conductive through-hole of the first ground point 182; the second via penetrates the dielectric substrate 30 and is correspondingly connected to a second ground point 184, wherein the second via is opposite to a conductive through-hole of the second ground point 184.

[0073] The dielectric substrate 30 can be made of epoxy resin (FR4Epoxy), and the relative permittivity of the dielectric substrate 30 is 4.4, with a dielectric loss tangent of 0.02. The dielectric substrate 30 and the metal ground plane 40 can be integrated on a printed circuit board, which can be a multilayer board. The radiator 10 of the antenna device 100 can be formed on the surface of the printed circuit board by etching, and the printed circuit board can be a flexible printed circuit board.

[0074] Please see Figure 8 and Figure 9 The antenna device 100 of this application has high efficiency. The first radiating part 12 can be a low-frequency radiating patch, which operates in a first frequency band with a center frequency of approximately 6.5 GHz and a bandwidth greater than or equal to 500 MHz. The second radiating part 14 can be a high-frequency radiating patch, which operates in a second frequency band with a center frequency of approximately 8 GHz and a bandwidth greater than or equal to 500 MHz.

[0075] Please see Figure 10When the antenna device 100 operates in the first frequency band (center frequency approximately 6.5 GHz), the vector current is distributed around the first radiating stub 124 and the second radiating stub 126. The current flowing through the first radiating stub 124 excites the signal in the first frequency band, and the current flowing through the second radiating stub 126 also excites the signal in the first frequency band. Therefore, the low-frequency resonance can be adjusted by changing the spacing between the grounding part 18 and the radiating stubs. For example, the spacing between the first grounding point 182 and the first radiating stub 124 can be changed, or the spacing between the second grounding point 184 and the second radiating stub 126 can be changed, which helps to excite a low-frequency 1 / 4 wavelength resonant beam. The larger the distance between the first grounding point 182 and the first radiating branch 124 (or the distance between the second grounding point 184 and the second radiating branch 126), the longer the current path, and the lower the tuned frequency; the smaller the distance between the first grounding point 182 and the first radiating branch 124 (or the distance between the second grounding point 184 and the second radiating branch 126), the smaller the current path, and the higher the tuned frequency.

[0076] Please see Figure 11 When the antenna device 100 operates in the second frequency band (center frequency approximately 8 GHz), the vector current is distributed in the second radiating section 14, the gap between the second radiating section 14 and the first radiating stub 124, and the gap between the second radiating section 14 and the second radiating stub 126. The current flowing through the second radiating section 14 excites the signal in the second frequency band, as do the current flowing through the gap between the second radiating section 14 and the first radiating stub 124, and the current flowing through the gap between the second radiating section 14 and the second radiating stub 126. Therefore, adjusting the length of the protrusion of the second radiating section 14 relative to the radiating body 122 can adjust the high-frequency resonance, which helps to excite the slot mode of the E-shaped antenna at high frequencies. The longer the protrusion of the second radiating section 14 relative to the radiating body 122, the longer the current path, and the lower the tuned frequency; conversely, the shorter the protrusion of the second radiating section 14 relative to the radiating body 122, the shorter the current path, and the higher the tuned frequency.

[0077] Further, in this embodiment, the first radiating part 12 is configured to radiate a signal with a first linear polarization characteristic under the excitation of the excitation current, and the second radiating part 14 is configured to radiate a signal with a second linear polarization characteristic under the excitation of the excitation current, wherein the first linear polarization characteristic is the same as the second linear polarization characteristic. It should be understood that, in this embodiment, polarization characteristic is used to characterize the direction of oscillation of the signal radiated by the radiator 10 in the propagation medium, and the polarization / signal polarization characteristic of the antenna is a parameter describing the spatial orientation of the electromagnetic wave vector radiated by the antenna. Since the electric field and magnetic field have a constant relationship, the spatial orientation of the electric field vector is generally used as the polarization direction of the electromagnetic wave radiated by the antenna. Linear polarization characterizes the fixed orientation of the electric field vector corresponding to the electromagnetic wave in space. For example, with the ground as a reference, if the direction of the electric field vector corresponding to the electromagnetic wave is parallel to the ground, then the linear polarization characteristic of the electromagnetic wave is horizontal polarization; if the direction of the electric field vector corresponding to the electromagnetic wave is perpendicular to the ground, then the linear polarization characteristic of the electromagnetic wave is vertical polarization. In some specific embodiments of this application, for example, both the first linear polarization and the second linear polarization can be vertical polarization; for example, both the first linear polarization and the second linear polarization can be horizontal polarization; for example, the first linear polarization and the second linear polarization do not have to be strictly vertical polarization, but have polarization components in the vertical direction; or, the first linear polarization and the second linear polarization do not have to be strictly polarized, but have polarization components in the horizontal direction.

[0078] Please see Figure 12 and Figure 13 , Figure 12 The radiation pattern of the antenna device 100 at 6.5 GHz is shown. The first radiating part 12 and the second radiating part 14 have the same linear polarization characteristics when they are working, so that the antenna device 100 has the same linear polarization characteristics in two frequency bands. It has a high cross-polarization ratio in both the E / H plane and the main beam radiation range. The cross-polarization ratio (the ratio of the main polarization component to the cross-polarization component) is approximately 10 dB, which ensures that the antenna device 100 has good anti-interference capability.

[0079] Please see Figure 14 and Figure 15 , Figure 14 The radiation pattern of the antenna device 100 at 8 GHz is shown. The first radiating part 12 and the second radiating part 14 have the same linear polarization characteristics when they are working, so that the antenna device 100 has the same linear polarization characteristics in two frequency bands. It has a high cross-polarization ratio in the E / H plane and in the main beam radiation range. The cross-polarization ratio (the ratio of the main polarization component to the cross-polarization component) is approximately 10 dB, which ensures that the antenna device 100 has good anti-interference capability.

[0080] Please see Figure 16 , Figure 16This illustration shows another structural diagram of the antenna device 100 according to an embodiment of this application. In this embodiment, the two side edges of the first radiating branch 124 are approximately serrated. Further, multiple notches 5231 are formed on the two side edges of the first radiating branch 124, and these notches 5231 are arranged sequentially at intervals, making the two side edges of the first radiating branch 124 approximately serrated. Further, the first radiating branch 124 includes a first side 5233 and a second side 5235 facing away from each other. The second side 5235 is opposite to the second radiating section 54. Multiple notches 5231 are arranged sequentially at intervals on the first side 5233 and the second side 5235. The multiple notches 5231 on the first side 5233 and the multiple notches 5231 on the second side 5235 are staggered, allowing the current path to propagate along the direction defined by the boundary of the notch 5231. Therefore, the current path can be further increased, and the size of the radiator 10 can be further reduced while ensuring that the current path length in the first radiating section 12 meets the operating frequency band requirements.

[0081] In some specific instances, the shape of the notch 5231 is not limited; it can be a triangular notch. Figure 16 ), rectangular notch ( Figure 17 It can be any combination of one or more shapes such as trapezoidal notches, arc-shaped notches, etc. It should be noted that the depth P of the multiple notches 5231 (that is, the maximum size of the notch 5231 relative to the edge recess of the first radial branch 124) should be greater than half of the width dimension W2 of the first radial branch 124, so that the current path of the first radial branch 124 presents a bent path, which can achieve the purpose of lengthening the current path.

[0082] The two sides of the second radial branch 124 can also be notched, and the specific structure can be the same as that of the first radial branch 124.

[0083] Please see Figure 18 Based on the antenna device 100 described above, this application also provides a housing 200. The housing 200 can be applied to electronic devices. For example, the housing 200 can serve as a protective case or an outer shell for an electronic device. The following description uses a protective case as an example to illustrate the housing 200. When the housing 200 serves as a protective case, it acts as an outer casing for an electronic device, protecting it from damage such as impacts and scratches. This electronic device can be, but is not limited to, portable communication devices (such as mobile phones), tablet computers, personal digital assistants, etc.

[0084] The housing 200 includes an antenna device 2001 and a housing body 2003. The antenna device 2001 is disposed on the housing body 2003. The configuration and parameters of the antenna device 2001 in this embodiment can be substantially the same as those of any of the antenna devices 100 described above. The antenna device 2001 can be directly embedded in the housing body 2003 or disposed on the surface of the housing body 2003; this application does not impose any limitations. The housing body 2003 includes a body 201 and a sidewall 203. The antenna device 2001 is disposed on the body 201, and the sidewall 203 is connected to the side of the body 201 and extends in a direction substantially perpendicular to the body 201, so that the body 201 and the sidewall 203 together form a receiving space 2011. The receiving space 2011 is used to receive electronic equipment.

[0085] In other embodiments, the housing 200 can serve as the outer shell of an electronic device, forming the outer surface of the electronic device together with the display screen of the electronic device, and serving to house and protect the internal electronic components of the electronic device.

[0086] Please see Figure 19 This application also provides an electronic device 400, which can be, but is not limited to, a mobile phone, a tablet computer, a smartwatch, or other electronic devices. The electronic device 400 in this embodiment will be described using a mobile phone as an example.

[0087] Electronic device 400 includes a housing 401 and an antenna device 405 disposed in the housing 401. Electronic device 400 may also include a display screen 403, which 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.

[0088] Specifically, in the embodiments of this application, the housing 401 includes a rear housing 4011 and a middle frame 4013, with the rear housing 4011 and the display screen 403 respectively disposed on opposite sides of the middle frame 403.

[0089] In this embodiment, the antenna device 405 can be any one 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 405 is integrated into or disposed within the housing 401. For example, the antenna device 405 can be disposed on the mid-frame 4013, on the rear shell 4011, on the mainboard of the electronic device 400, or on other electronic devices and housed within the housing 401. This specification does not limit this.

[0090] In the antenna device, housing, and electronic device provided in this application, the first radiating part of the antenna device is a bent radiating structure, and the second radiating part is disposed within the bent radiating structure and connected to the first radiating part. This helps to reduce the overall size of the radiator, thereby promoting the miniaturization of the antenna device and reducing the space occupied by the antenna device. Furthermore, the grounding part is disposed in the first radiating part, making the structural arrangement between the first radiating part and the grounding part more compact, which also helps to reduce the overall size of the radiator. Simultaneously, the first frequency band signal radiated by the radiator is different from the second frequency band signal, enabling dual-frequency radiation of the antenna device. Since the grounding part is disposed in the first radiating part, changing the position of the grounding part in the first radiating part helps to adjust the resonant frequency of the first radiating part to better adapt to the application scenario of the antenna device.

[0091] In this specification, illustrative expressions of terminology do not necessarily refer to the same implementation or example. Furthermore, specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more implementations or examples. Moreover, those skilled in the art can combine and integrate the different implementations or examples described herein, as well as the features of those different implementations or examples, without contradiction.

[0092] 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.

[0093] In this specification, the specific features or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, 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, 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, The antenna device includes a radiator and a feed source. The radiator includes a first radiating section, a second radiating section, a feed source, and a grounding section. The first radiating section is a bent radiating structure, comprising a radiating body, a first radiating branch, and a second radiating branch, which are spaced apart. The two ends of the radiating body are respectively connected to the first radiating branch and the second radiating branch. The second radiating section is disposed within the bent radiating structure and connected to the first radiating section. The second radiating section is disposed between the first radiating branch and the second radiating branch and connected to the radiating body. The grounding section is disposed on the first radiating section. The grounding section includes a first grounding point and a second grounding point, which are spaced apart from each other on the radiating body. The grounding section is adapted for grounding. Both the feed source and the grounding section are disposed on the radiating body. The length of the second radiating part protruding relative to the radiating body is less than the length of the first radiating branch protruding relative to the radiating body, and the length of the first radiating branch protruding relative to the radiating body is equal to the length of the second radiating branch protruding relative to the radiating body. Both the first and second radial branches have multiple notches on their two side edges, and the depth of each notch is greater than half the width dimension of the first radial branch. The feed source is electrically connected to the feed section and is configured to feed an excitation current into the radiator. The excitation current flows through the first radiator and the second radiator to make the radiator radiate a signal in a first frequency band and a signal in a second frequency band, wherein the second frequency band is different from the first frequency band.

2. The antenna device as claimed in claim 1, characterized in that, The distance between the first grounding point and the first radiating stub is less than the distance between the second grounding point and the first radiating stub; or / and The distance between the second grounding point and the second radiating branch is less than the distance between the first grounding point and the second radiating branch.

3. The antenna device as described in claim 1, characterized in that, The first radiating branch, the second radiating branch, and the second radiating portion are connected to the same side of the radiating body and extend in the same direction.

4. The antenna device as described in claim 3, characterized in that, One side of the second radiating part is separated from the first radiating branch, and the other side of the second radiating part is separated from the second radiating branch.

5. The antenna device as described in claim 4, characterized in that, The distance between the second radiating part and the first radiating branch is equal to the distance between the second radiating part and the second radiating branch.

6. The antenna device as claimed in claim 1, characterized in that, The antenna device further includes a dielectric substrate and a metal ground plane, the dielectric substrate being disposed between the radiator and the metal ground plane; the dielectric substrate is provided with conductive vias, the conductive vias penetrating the dielectric substrate and correspondingly connected to the grounding portion.

7. The antenna device as described in any one of claims 1 to 6, characterized in that, The center frequency of the first frequency band is 6.5 GHz, and the center frequency of the second frequency band is 8 GHz.

8. The antenna device as claimed in claim 7, characterized in that, The first radiating part is configured to radiate a signal having a first linear polarization characteristic under the excitation of the excitation current, and the second radiating part is configured to radiate a signal having a second linear polarization characteristic under the excitation of the excitation current, wherein the first linear polarization characteristic is the same as the second linear polarization characteristic.

9. A housing, characterized in that, It includes a housing body and an antenna device according to any one of claims 1 to 8, wherein the antenna device is disposed on the housing body.

10. An electronic device, characterized in that, The device includes a housing and an antenna device as described in any one of claims 1 to 8, wherein the antenna device is disposed in the housing.

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