Antenna device and electronic device

Abstract

Embodiments of the present application provide an antenna device and an electronic device. The antenna device comprises: a first radiator, the first radiator comprising a ground part and a first part and a second part located on both sides of the ground part, the ground part being grounded; a second radiator, the second radiator having a gap with the first part, the second radiator being grounded; the second radiator is electromagnetically coupled with the first part through the gap, so that the second radiator and the first part jointly form a first antenna, the first antenna covering a medium-high frequency band and 5G communication; the second part forms a second antenna, the second antenna covering a low frequency band and the medium-high frequency band. The antenna device of the embodiments of the present application can form double coverage for the medium-high frequency band, and form coverage for 5G communication and the low frequency band, so as to expand the bandwidth of the antenna device and improve the communication performance of the antenna device.

Description

Technical Field

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

[0002] Electronic devices such as smartphones typically have multiple antennas, such as LB (Lower Band) antennas, MHB (Middle High Band) antennas, and WiFi antennas, to achieve corresponding communication functions.

[0003] In related technologies, antenna design is often difficult because it is limited by factors such as miniaturization of electronic devices, high screen ratio, and increasing number of antennas. Antenna performance is often difficult to meet the requirements. Summary of the Invention

[0004] This application provides an antenna device and an electronic device that can expand the bandwidth of the antenna device and improve its communication performance.

[0005] This application provides an antenna device, including:

[0006] A first radiator, the first radiator including a grounding part and a first part and a second part located on both sides of the grounding part, the grounding part being grounded;

[0007] A second radiator, having a gap between the second radiator and the first part, and the second radiator being grounded;

[0008] The second radiator is electromagnetically coupled to the first part through the gap, so that the second radiator and the first part together form a first antenna, which covers the mid-to-high frequency band and 5G communication.

[0009] The second part forms the second antenna, which covers the low-frequency band and the mid-to-high-frequency band.

[0010] This application also provides an electronic device, including a housing and an antenna device disposed on the housing, wherein the antenna device is the antenna device described above.

[0011] The antenna device of this application embodiment can cover the mid-to-high frequency band and 5G communication through the first antenna, and can cover the low frequency band and mid-to-high frequency band through the second antenna, thereby forming dual coverage of the mid-to-high frequency band and coverage of 5G communication and the low frequency band. Therefore, it can expand the bandwidth of the antenna device and improve the communication performance of the antenna device. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the first structure of the antenna device according to an embodiment of this application.

[0014] Figure 2 This is a schematic diagram of a second structure of the antenna device according to an embodiment of this application.

[0015] Figure 3 This is a schematic diagram of a third structure of the antenna device according to an embodiment of this application.

[0016] Figure 4 This is a schematic diagram of the first type of resonant current distribution of the antenna device according to an embodiment of this application.

[0017] Figure 5 This is a schematic diagram of the second type of resonant current distribution of the antenna device according to an embodiment of this application.

[0018] Figure 6 This is a schematic diagram of the third type of resonant current distribution of the antenna device according to an embodiment of this application.

[0019] Figure 7 This is a schematic diagram of the fourth type of resonant current distribution of the antenna device according to an embodiment of this application.

[0020] Figure 8 This is a schematic diagram of the fifth type of resonant current distribution of the antenna device according to an embodiment of this application.

[0021] Figure 9 This is a schematic diagram of the sixth type of resonant current distribution of the antenna device according to an embodiment of this application.

[0022] Figure 10 This is a schematic diagram of the seventh type of resonant current distribution of the antenna device according to an embodiment of this application.

[0023] Figure 11 This is a schematic diagram of the eighth type of resonant current distribution of the antenna device according to an embodiment of this application.

[0024] Figure 12 This is a schematic diagram of the S-parameters of the antenna device according to an embodiment of this application.

[0025] Figure 13 This is a schematic diagram of the isolation between the first antenna and the second antenna of the antenna device according to an embodiment of this application.

[0026] Figure 14This is a schematic diagram illustrating the overall system efficiency of the antenna device according to an embodiment of this application.

[0027] Figure 15 This is a schematic diagram of a fourth structure of the antenna device according to an embodiment of this application.

[0028] Figure 16 This is a fifth structural schematic diagram of the antenna device according to an embodiment of this application.

[0029] Figure 17 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0030] 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. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] This application provides an antenna device that can be applied to electronic devices. These electronic devices may include, for example, smartphones, tablets, gaming devices, AR (Augmented Reality) devices, laptops, desktop computing devices, and other devices with wireless communication capabilities.

[0032] refer to Figure 1 , Figure 1 This is a schematic diagram of a first structure of the antenna device 100 according to an embodiment of this application. The antenna device 100 includes a first radiator 10 and a second radiator 20.

[0033] Both the first radiator 10 and the second radiator 20 can be antenna radiators in the form of FPC (Flexible Printed Circuit), LDS (Laser Direct Structure), PDS (Printing Direct Structure), etc., or MDA (In-Mold Design). They can also be antenna radiators formed from conductor structures of electronic devices, metal traces on circuit boards, etc. In practical applications, the first radiator 10 and the second radiator 20 can be antenna radiators of different or the same form. The shape and size of the first radiator 10 and the second radiator 20 can be set according to actual requirements.

[0034] The first radiator 10 includes a first portion 11, a second portion 12, and a ground portion 13. The first portion 11 and the second portion 12 are located on both sides of the ground portion 13. The ground portion 13 is grounded. For example, the ground portion 13 can be electrically connected to the system ground of an electronic device to achieve grounding. In one example of practical application, the first radiator 10 can be L-shaped, and the ground portion 13 can be located at the corner of the L-shape.

[0035] A gap 30 exists between the second radiator 20 and the first portion 11. The second radiator 20 is electromagnetically coupled to the first portion 11 through the gap 30. The second radiator 20 is grounded. For example, the second radiator 20 can be electrically connected to the system ground of an electronic device to achieve grounding. In one example of a practical application, the end of the second radiator 20 furthest from the gap 30 can be grounded.

[0036] The second radiator 20 and the first part 11 can be electromagnetically coupled to form a first antenna. The first antenna can cover the middle high band (MHB) and 5G communication. In some embodiments, the frequency range of the middle high band includes 1710MHz to 2690MHz.

[0037] The second portion 12 of the first radiator 10 forms the second antenna. The second antenna is capable of covering both the low-frequency band (LB) and the mid-to-high-frequency band. In some embodiments, the frequency range of the low-frequency band includes 617MHz to 960MHz.

[0038] The antenna device 100 of this application embodiment can cover the mid-to-high frequency band and 5G communication through the first antenna, and can cover the low frequency band and mid-to-high frequency band through the second antenna, thereby forming dual coverage of the mid-to-high frequency band and coverage of 5G communication and the low frequency band. Therefore, it can expand the bandwidth of the antenna device and improve the communication performance of the antenna device.

[0039] In some embodiments, continue to refer to Figure 1 The first part 11 includes a first feed point 111, which is used to feed an excitation signal to the first antenna. The second part 12 includes a second feed point 121, which is used to feed an excitation signal to the second antenna.

[0040] The antenna device 100 also includes a first feed 41 and a second feed 42. In practical applications, the first feed 41 and the second feed 42 can be mounted on the circuit board of the electronic device, such as on the motherboard, or on a separate small board.

[0041] The first feed source 41 is electrically connected to the first feed point 111. The first feed source 41 provides a first excitation signal and feeds the first excitation signal to the first antenna through the first feed point 111 to excite the first antenna to resonate, thereby covering the mid-to-high frequency band and 5G communication. In practical applications, the first excitation signal may include 4G communication excitation signals, 5G communication excitation signals, etc., such as LTE (Long Term Evolution) excitation signals and NR (New Radio) excitation signals.

[0042] The second feed source 42 is electrically connected to the second feed point 121. The second feed source 42 is used to provide a second excitation signal and feeds the second excitation signal to the second antenna through the second feed point 121 to excite the second antenna to resonate, thereby covering the low-frequency band and the mid-to-high-frequency band. In practical applications, the second excitation signal may include a 4G communication excitation signal, such as an LTE excitation signal.

[0043] In some embodiments, reference Figure 2 , Figure 2 This is a schematic diagram of a second structure of the antenna device 100 according to an embodiment of this application.

[0044] The antenna device 100 also includes a first filter circuit 51. The first filter circuit 51 is disposed between the first feed source 41 and the first feed point 111. The first feed source 41 is electrically connected to the first feed point 111 through the first filter circuit 51. The first filter circuit 51 can be used to filter out interference signals, thus preventing the second antenna from interfering with the first antenna, thereby improving the isolation between the first antenna and the second antenna.

[0045] In some embodiments, the first filter circuit 51 includes a first capacitor C1, a first inductor L1, a second capacitor C2, and a second inductor L2.

[0046] One end of the first capacitor C1 is electrically connected to the first feed point 111. One end of the first inductor L1 is electrically connected to the other end of the first capacitor C1, and the other end of the first inductor L1 is electrically connected to the first feed source 41.

[0047] One end of the second capacitor C2 is electrically connected between the first capacitor C1 and the first feed point 111, and the other end of the second capacitor C2 is grounded. One end of the second inductor L2 is electrically connected between the first capacitor C1 and the first feed point 111, and the other end of the second inductor L2 is grounded. That is, the second capacitor C2 and the second inductor L2 are connected in parallel, with one end of the parallel connection electrically connected between the first capacitor C1 and the first feed point 111, and the other end grounded.

[0048] In practical applications, the capacitance values ​​of the first capacitor C1 and the second capacitor C2 can be set according to requirements, as can the inductance values ​​of the first inductor L1 and the second inductor L2, to ensure good isolation between the first antenna and the second antenna.

[0049] In some embodiments, continue to refer to Figure 2 The antenna device 100 also includes a second filter circuit 52. The second filter circuit 52 is disposed between the second feed source 42 and the second feed point 121. The second feed source 42 is electrically connected to the second feed point 121 through the second filter circuit 52. The second filter circuit 52 can also be used to filter out interference signals, avoid mutual interference between the second antenna and the first antenna, thereby improving the isolation between the second antenna and the first antenna.

[0050] In some embodiments, the second filter circuit 52 includes a third capacitor C3 and a fourth capacitor C4. One end of the third capacitor C3 is electrically connected to the second feed point 121, and the other end of the third capacitor C3 is electrically connected to the second feed source 42. One end of the fourth capacitor C4 is electrically connected between the third capacitor C3 and the second feed source 42, and the other end of the fourth capacitor C4 is grounded.

[0051] In practical applications, the capacitance values ​​of the third capacitor C3 and the fourth capacitor C4 can be set according to requirements to ensure good isolation between the first antenna and the second antenna.

[0052] In some embodiments, reference Figure 3 , Figure 3 This is a schematic diagram of the third structure of the antenna device 100 according to an embodiment of this application.

[0053] The first radiator 10 has a first portion 11 including a first end 112 and a second portion 12 including a second end 122. Both the first end 112 and the second end 122 are located away from the grounding portion 13. The first end 112 faces the second radiator 20.

[0054] The second radiator 20 includes a third end 21 and a fourth end 22. The third end 21 is grounded, for example, electrically connected to the system ground of an electronic device to achieve grounding. The fourth end 22 faces the first portion 11 of the first radiator 10. Understandably, the gap 30 is located between the first end 112 and the fourth end 22.

[0055] In some embodiments, the second portion 12 of the first radiator 10 further includes a first grounding point 123 and a second grounding point 124. The first grounding point 123 and the second grounding point 124 are spaced apart. In one example of practical application, the first grounding point 123 is located between the grounding portion 13 and the second feed point 121, and the second grounding point 124 is located between the grounding portion 13 and the first grounding point 123. In this case, the second grounding point 124, the first grounding point 123, and the second feed point 121 are sequentially spaced apart in a direction away from the grounding portion 13.

[0056] Both the first grounding point 123 and the second grounding point 124 are grounded, for example, they can be electrically connected to the system ground of the electronic device to achieve grounding.

[0057] In some embodiments, the antenna device 100 further includes a bandpass filter circuit 53. One end of the bandpass filter circuit 53 is electrically connected to the first ground point 123, and the other end is grounded. The first ground point 123 is grounded through the bandpass filter circuit 53. In one example of practical application, the bandpass filter circuit 53 includes a fifth capacitor C5 and a third inductor L3. One end of the fifth capacitor C5 is electrically connected to the first ground point 123. One end of the third inductor L3 is electrically connected to the other end of the fifth capacitor C5, and the other end of the third inductor L3 is grounded. The capacitance value of the fifth capacitor C5 and the inductance value of the third inductor L3 can be set according to actual needs. In practical applications, a tuning switch can also be set on the grounding path of the first ground point 123 according to actual needs, for example, a tuning switch can be set between the third inductor L3 and ground to switch the resonant frequency band of the second antenna.

[0058] In some embodiments, the antenna device 100 further includes a sixth capacitor C6. One end of the sixth capacitor C6 is electrically connected to the second grounding point 124, and the other end is grounded. The second grounding point 124 can be grounded through the sixth capacitor C6. The capacitance value of the sixth capacitor C6 can be set according to actual needs.

[0059] In some embodiments, the antenna device 100 further includes a switch 54 disposed between the sixth capacitor C6 and ground. In practical applications, the switch 54 can be a tuning switch, which can be used to switch the resonant frequency band of the second antenna. For example, the switch 54 may include multiple tuning paths, and when the switch 54 is turned on different tuning paths, it presents different impedances, thereby causing the second antenna to resonate at different frequency bands.

[0060] The antenna device 100 of this application embodiment is described in detail below, in which the first antenna covers the mid-to-high frequency band and 5G communication, and the second antenna covers the low-frequency band and the mid-to-high frequency band.

[0061] In some embodiments, reference Figure 4 , Figure 4This is a schematic diagram of the first type of resonant current distribution of the antenna device 100 according to an embodiment of this application.

[0062] The first excitation signal provided by the first feed source 41 is used to excite the first portion 11 of the first radiator 10 to generate a first resonant mode. The first resonant mode is a quarter-wavelength mode from the ground portion 13 to the first end portion 112, and the first resonant mode covers a first frequency band in the mid-to-high frequency band, the wavelength of which is the wavelength corresponding to the center frequency of the first frequency band. In one example of practical application, the center frequency of the first frequency band can be 1.8 GHz. The first resonant mode forms a first resonant current I1 in the first portion 11, and the first resonant current I1 extends from the ground portion 13 to the first end portion 112.

[0063] In some embodiments, reference Figure 5 , Figure 5 This is a schematic diagram of the second type of resonant current distribution of the antenna device 100 according to an embodiment of this application.

[0064] The first excitation signal is also used to excite the first part 11 to generate a second resonant mode. The second resonant mode is a quarter-wavelength mode from the first feed point 111 to the first end 112, covering a second frequency band in the mid-to-high frequency band, and the wavelength is the wavelength corresponding to the center frequency of the second frequency band. In one example of practical application, the center frequency of the second frequency band is greater than the center frequency of the first frequency band, and the center frequency of the second frequency band can be 2.6 GHz. The second resonant mode generates a second resonant current I2 in the first part 11, which extends from the first feed point 111 to the first end 112.

[0065] In some embodiments, reference Figure 6 , Figure 6 This is a schematic diagram of the third type of resonant current distribution of the antenna device 100 according to an embodiment of this application.

[0066] The first excitation signal is also used to excite the second radiator 20 and the first portion 11 of the first radiator 10 to jointly generate a third resonant mode. The third resonant mode is a half-wavelength mode, covering the N77 and N78 frequency bands of 5G communication. This wavelength is the center frequency of either the N77 or N78 band, for example, 3.5 GHz. The frequency range of the N77 band is 3.3 GHz to 4.2 GHz, and the frequency range of the N78 band is 3.3 GHz to 3.8 GHz. In the third resonant mode, the second radiator 20 generates a third resonant current I3, which flows from the third end 21 to the fourth end 22; the first portion 11 of the first radiator 10 generates a fourth resonant current I4, which flows from the first end 112 to the first feed point 111. The third resonant current I3 and the fourth resonant current I4 are in the same direction.

[0067] In some embodiments, reference Figure 7 , Figure 7 This is a schematic diagram of the fourth resonant current distribution of the antenna device 100 according to an embodiment of this application.

[0068] The second excitation signal provided by the second feed source 42 is used to excite the second part 12 of the first radiator 10 to generate a fourth resonant mode. The fourth resonant mode is a quarter-wavelength mode from the ground part 13 to the second feed point 121. The fourth resonant mode covers a low-frequency band, and the wavelength is the wavelength corresponding to the center frequency of the covered low-frequency band, for example, the center frequency can be 0.8 GHz. Among them, the fourth resonant mode forms a fifth resonant current I5 in the second part 12, and the fifth resonant current I5 runs from the ground part 13 to the second feed point 121.

[0069] In practical applications, low-frequency bands can include LTE bands such as B71 (uplink frequency 663MHz~698MHz, downlink frequency 617MHz~652MHz), B12 (uplink frequency 699MHz~716MHz, downlink frequency 729MHz~746MHz), B5 (uplink frequency 824MHz~849MHz, downlink frequency 869MHz~894MHz), and B8 (uplink frequency 880MHz~915MHz, downlink frequency 925MHz~960MHz).

[0070] Understandably, since the low-frequency band contains a large number of frequency bands, in practical applications, the low-frequency band covered by the fourth resonant mode can be switched by switch 54; when a tuning switch is set on the grounding path of the first grounding point 123, the low-frequency band covered by the fourth resonant mode can also be switched by the tuning switch, or the low-frequency band covered by the fourth resonant mode can be switched by the tuning switch and switch 54 together.

[0071] In some embodiments, reference Figure 8 , Figure 8 This is a schematic diagram of the fifth type of resonant current distribution of the antenna device 100 according to an embodiment of this application.

[0072] The second excitation signal is also used to excite the second part 12 to generate a fifth resonant mode. The fifth resonant mode is a quarter-wavelength mode from the first ground point 123 to the second end 122, covering the third frequency band in the mid-to-high frequency band. This wavelength corresponds to the center frequency of the third frequency band. In one example of practical application, the center frequency of the third frequency band can be 2.1 GHz. The fifth resonant mode generates a sixth resonant current I6 in the second part 12, which extends from the first ground point 123 to the second end 122.

[0073] In some embodiments, reference Figure 9 , Figure 9 This is a schematic diagram of the sixth type of resonant current distribution of the antenna device 100 according to an embodiment of this application.

[0074] The second excitation signal is also used to excite the second part 12 to generate the sixth resonant mode. The sixth resonant mode is a three-quarter wavelength mode, covering the fourth frequency band in the mid-to-high frequency band. This wavelength is the wavelength corresponding to the center frequency of the fourth frequency band. In a practical application example, the center frequency of the fourth frequency band is greater than the center frequency of the third frequency band, and the center frequency of the fourth frequency band can be 2.7 GHz.

[0075] In the sixth resonant mode, the second part 12 generates a seventh resonant current I7, an eighth resonant current I8, and a ninth resonant current I9. The seventh resonant current I7 flows from the second grounding point 124 to the grounding part 13, the eighth resonant current I8 flows from the second grounding point 124 to the first grounding point 123, and the ninth resonant current I9 flows from the first grounding point 123 to the second end 122. The eighth resonant current I8 and the ninth resonant current I9 are in the same direction, while the seventh resonant current I7 is in the opposite direction to the eighth resonant current I8 and the ninth resonant current I9.

[0076] In some embodiments, the second antenna formed by the second portion 12 of the first radiator 10 also covers WiFi (Wireless-Fidelity) communication. In this case, the second excitation signal provided by the second feed 42 may also include a WiFi excitation signal. Therefore, the antenna device 100 can simultaneously cover low-frequency bands, mid-to-high-frequency bands, 5G communication, and WiFi communication, enabling the antenna device 100 to have richer communication modes.

[0077] In some embodiments, reference Figure 10 , Figure 10 This is a schematic diagram of the seventh type of resonant current distribution of the antenna device 100 according to an embodiment of this application.

[0078] The second excitation signal provided by the second feed source 42 is also used to excite the second portion 12 of the first radiator 10 to generate a seventh resonant mode. The seventh resonant mode is a quarter-wavelength mode from the second feed point 121 to the second end 122, covering the fifth frequency band of WiFi communication. This wavelength corresponds to the center frequency of the fifth frequency band. In one example of a practical application, the center frequency of the fifth frequency band is 5.3 GHz. The seventh resonant mode forms a tenth resonant current I in the second portion 12. 10 The tenth resonant current I 10 From the second feed point 121 to the second end 122.

[0079] In some embodiments, reference Figure 11 , Figure 11 This is a schematic diagram of the eighth type of resonant current distribution of the antenna device 100 according to an embodiment of this application.

[0080] The second excitation signal is also used to excite the second part 12 to generate the eighth resonant mode. The eighth resonant mode is a full-wavelength mode, covering the sixth frequency band of WiFi communication, and this wavelength is the wavelength corresponding to the center frequency of the sixth frequency band. In a practical application example, the center frequency of the sixth frequency band is greater than the center frequency of the fifth frequency band; for example, the center frequency of the sixth frequency band can be 5.8 GHz.

[0081] In the eighth resonant mode, the second part 12 generates the eleventh resonant current I. 11 The twelfth resonant current I 12 The thirteenth resonant current I 13 and the fourteenth resonant current I 14 The eleventh resonant current I 11 From grounding part 13 to the second grounding point 124, the twelfth resonant current I 12 From the second grounding point 124 to the first grounding point 123, the eleventh resonant current I 11 With the twelfth resonant current I 12 Same direction. Fourteenth resonant current I 14 From the second end 122 to the second feed point 121, the thirteenth resonant current I 13 From the second feed point 121 to the first ground point 123, the thirteenth resonant current I 13 With the fourteenth resonant current I 14 Same direction. Eleventh resonant current I 11 The twelfth resonant current I 12 With the thirteenth resonant current I 13 Fourteenth resonant current I 14 Reverse.

[0082] Understandably, the second excitation signal can excite the second part 12 to generate the seventh resonant mode and the eighth resonant mode simultaneously, thus covering two different frequency bands of WiFi communication at the same time, namely the fifth and sixth frequency bands of WiFi communication. Therefore, it can expand the bandwidth of WiFi communication and improve the WiFi communication performance of the antenna device 100.

[0083] refer to Figures 12 to 14 , Figure 12 This is a schematic diagram of the S-parameters of the antenna device 100 according to an embodiment of this application. Figure 13 This is a schematic diagram illustrating the isolation between the first antenna and the second antenna of the antenna device 100 according to an embodiment of this application. Figure 14 This is a schematic diagram of the overall system efficiency of the antenna device 100 according to an embodiment of this application.

[0084] like Figure 12 As shown, curve L1 is the S-parameter curve of the first ray formed by the second radiator 20 and the first part 11 of the first radiator 10, and curve L2 is the S-parameter curve of the second ray formed by the second part 12 of the first radiator 10.

[0085] In this diagram, marker 1 represents the center frequency of the first resonant mode generated by the first antenna, approximately 1.8641 GHz, covering the mid-to-high frequency band. Marker 2 represents the center frequency of the second resonant mode generated by the first antenna, approximately 2.6064 GHz, also covering the mid-to-high frequency band. Marker 3 represents the center frequency of the third resonant mode generated by the first antenna, approximately 3.5362 GHz, covering the N77 and N78 frequency bands for 5G communication.

[0086] Point 4 represents the center frequency of the fourth resonant mode generated by the second antenna, approximately 0.8788 GHz, covering the low-frequency band. Point 5 represents the center frequency of the fifth resonant mode generated by the second antenna, approximately 2.1945 GHz, covering the mid-to-high frequency band. Point 6 represents the center frequency of the sixth resonant mode generated by the second antenna, approximately 2.755 GHz, covering the mid-to-high frequency band. Point 7 represents a first example of the center frequency of the seventh resonant mode generated by the second antenna, approximately 5.1681 GHz, covering WiFi communication. Point 8 represents a second example of the center frequency of the seventh resonant mode generated by the second antenna, approximately 5.3738 GHz, covering WiFi communication. Point 9 represents the center frequency of the eighth resonant mode generated by the second antenna, approximately 5.7911 GHz, covering WiFi communication.

[0087] It should be noted that the center frequencies corresponding to the above markers 1 to 9 are only some examples. In practical applications, the impedance matching state of the first antenna and the second antenna can also be adjusted to adjust the center frequencies of the above resonant modes.

[0088] like Figure 13 As shown in the figure, point 1 represents the isolation between the first and second antennas at 2.2003 GHz in the mid-to-high frequency band, which is approximately -10.991 dB. Point 2 represents the isolation between the first and second antennas at 2.7369 GHz in the mid-to-high frequency band, which is approximately -12.744 dB. The figure shows that although both the first and second antennas cover the mid-to-high frequency band, there is good isolation between them, ensuring the radiation performance of both antennas.

[0089] like Figure 14 As shown, curve L3 is the overall system efficiency curve of the first antenna, and curve L4 is the overall system efficiency curve of the second antenna.

[0090] In this diagram, point 1 represents the overall system efficiency of the first resonant mode generated by the first antenna, with a center frequency of approximately 1.867 GHz and a radiation efficiency of approximately -1.8034 dB. Point 2 represents the overall system efficiency of the second resonant mode generated by the first antenna, with a center frequency of approximately 2.5845 GHz and a radiation efficiency of approximately -2.5732 dB. Point 3 represents the overall system efficiency of the third resonant mode generated by the first antenna, with a center frequency of approximately 3.5151 GHz and a radiation efficiency of approximately -2.867 dB.

[0091] Point 4 represents the overall system efficiency of the fourth resonant mode generated by the second antenna, with a center frequency of approximately 0.9 GHz and a radiation efficiency of approximately -7.2858 dB. Point 5 represents the overall system efficiency of the fifth resonant mode generated by the second antenna, with a center frequency of approximately 2.1952 GHz and a radiation efficiency of approximately -6.384 dB. Point 6 represents the overall system efficiency of the sixth resonant mode generated by the second antenna, with a center frequency of approximately 2.78 GHz and a radiation efficiency of approximately -7.1189 dB. Point 7 represents the overall system efficiency of the seventh resonant mode generated by the second antenna, with a center frequency of approximately 5.2985 GHz and a radiation efficiency of approximately -2.445 dB. Point 8 represents the overall system efficiency of the eighth resonant mode generated by the second antenna, with a center frequency of approximately 5.8047 GHz and a radiation efficiency of approximately -3.4815 dB. As shown in the figure, both the first and second antennas exhibit good radiation efficiency in each resonant mode.

[0092] In some embodiments, reference Figure 15 , Figure 15 This is a schematic diagram of a fourth structure of the antenna device 100 according to an embodiment of this application. The antenna device 100 also includes a seventh capacitor C7. The capacitance value of the seventh capacitor C7 can be set according to actual needs. One end of the seventh capacitor C7 is electrically connected to the grounding part 13, and the other end is grounded. Therefore, the grounding part 13 can be grounded through the seventh capacitor C7.

[0093] In this embodiment, the seventh capacitor C7 is a DC blocking capacitor. Therefore, the grounding part 13 can be grounded through the DC blocking capacitor. In this case, the first radiator 10 can be understood as a floating radiator (a floating radiator is a radiator that is not directly grounded, and the DC signal on the floating radiator will not return to ground). Therefore, the first radiator 10 can also be configured to detect the SAR (Specific Absorption Ratio) value of the antenna device 100. When the detected SAR value exceeds the allowable value of the regulations, the antenna device 100 can perform power back-off to ensure that the SAR value after power back-off meets the regulatory requirements.

[0094] Understandably, configuring the first radiator 10 to detect the SAR value of the antenna device 100 enables the reuse of the first radiator 10, eliminating the need for a separate SAR sensor. This saves internal layout space in electronic devices and also reduces costs.

[0095] In practical applications, the antenna device 100 may also include an eighth capacitor C8. The capacitance value of the eighth capacitor C8 can be set according to actual needs. One end of the eighth capacitor C8 is electrically connected to the first feed point 111, and the other end is electrically connected to the first filter circuit 51. Therefore, the first feed point 111 can be electrically connected to the first feed source 41 through the eighth capacitor C8 and the first filter circuit 51.

[0096] Among them, the eighth capacitor C8, the third capacitor C3, the fifth capacitor C5, and the sixth capacitor C6 are all DC blocking capacitors. That is, the first feed point 111 is electrically connected to the first feed source 41 through the DC blocking capacitor C8, the second feed point 121 is electrically connected to the second feed source 42 through the DC blocking capacitor C3, the first ground point 123 is grounded through the DC blocking capacitor C5, and the second ground point 124 is grounded through the DC blocking capacitor C6. Therefore, it can be ensured that the first radiator 10 is a floating radiator, so that the first radiator 10 meets the requirements for detecting SAR values.

[0097] In some embodiments, reference Figure 16 , Figure 16 This is a fifth structural schematic diagram of the antenna device 100 according to an embodiment of this application. The grounding portion 13 includes a plurality of spaced-apart sub-grounding points, each of which is grounded. For example, in a feasible example, the grounding portion 13 includes three spaced-apart sub-grounding points 131, 132, and 133. Sub-grounding point 131 is grounded through capacitor C71, sub-grounding point 132 is grounded through capacitor C72, and sub-grounding point 133 is grounded through capacitor C73.

[0098] In practical applications, the more sub-grounding points included in the grounding part 13, the greater the improvement in the isolation between the first antenna and the second antenna. Therefore, by setting the grounding part 13 to include multiple sub-grounding points, each of which is grounded, the isolation between the first antenna and the second antenna can be improved, thereby improving the performance of the first antenna and the second antenna in radiating wireless signals.

[0099] Understandably, in practical applications, the capacitors C71, C72, and C73 mentioned above can all be DC blocking capacitors to ensure that the DC signal on the first radiator 10 does not return to ground, making the first radiator 10 a floating radiator and meeting the requirements for detecting SAR values.

[0100] This application also provides an electronic device, which may be, for example, a smartphone, tablet computer, gaming device, AR (Augmented Reality) device, laptop computer, desktop computing device, or other device with wireless communication capabilities.

[0101] refer to Figure 17 , Figure 17 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. The electronic device includes an antenna device 100 and a housing 200.

[0102] The housing 200 can form the overall outline of the electronic device and house various functional components of the electronic device. For example, functional components such as the motherboard and battery of the electronic device can be housed inside the housing 200, while functional components such as the display module and camera module can be housed on the housing 200.

[0103] The antenna device 100 is the antenna device of any of the above embodiments. The antenna device 100 is disposed in the housing 200. The electronic device can realize wireless communication function through the antenna device 100.

[0104] It should be noted that, in the embodiments of this application, "electrical connection" can be a direct connection between two electrical components or an indirect connection. For example, the electrical connection between A and B can be achieved by A and B being directly connected, or by A and B being indirectly connected through one or more other electrical components.

[0105] In the description of this application, it should be understood that terms such as “first” and “second” are used only to distinguish similar objects and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0106] The antenna device and electronic device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An antenna device, characterized by The antenna device comprises: a first radiator comprising a ground portion and a first portion and a second portion located on two sides of the ground portion, the ground portion being grounded; the second portion comprising a second end portion, a second feed point, and a first feed point and a second feed point which are both grounded, the second end portion being away from the ground portion, the first feed point being located between the ground portion and the second feed point, and the second feed point being located between the ground portion and the first feed point; a second radiator having a gap between the first portion and the second radiator, the second radiator being grounded; wherein the second radiator is electromagnetically coupled with the first portion through the gap, so that the second radiator and the first portion jointly form a first antenna, the first antenna covering a medium-high frequency band and 5G communication; and the second portion forms a second antenna, the second antenna covering a low frequency band and a medium-high frequency band; a second feed source electrically connected with the second feed point, the second feed source being configured to feed a second excitation signal to the second antenna through the second feed point, so as to excite the second antenna to generate at least a sixth resonant mode and an eighth resonant mode; the sixth resonant mode generates, on the second portion, a seventh resonant current flowing from the second feed point to the ground portion, an eighth resonant current flowing from the second feed point to the first feed point, and a ninth resonant current flowing from the first feed point to the second end portion; the eighth resonant mode generates, on the second portion, an eleventh resonant current flowing from the ground portion to the second feed point, a twelfth resonant current flowing from the second feed point to the first feed point, a fourteenth resonant current flowing from the second end portion to the second feed point, and a thirteenth resonant current flowing from the second feed point to the first feed point.

2. The antenna device of claim 1, wherein, The first portion comprises a first feed point; and the antenna device further comprises: a first feed source electrically connected with the first feed point, the first feed source being configured to feed a first excitation signal to the first antenna through the first feed point, so as to excite the first antenna to resonate.

3. The antenna device according to claim 2, wherein: the first portion comprises a first end portion, the first end portion being directed towards the second radiator; the first excitation signal is configured to excite the first portion to generate a first resonant mode of a quarter wavelength from the ground portion to the first end portion, the first resonant mode covering a first frequency band in the medium-high frequency band.

4. The antenna device according to claim 3, wherein: the first excitation signal is further configured to excite the first portion to generate a second resonant mode of a quarter wavelength from the first feed point to the first end portion, the second resonant mode covering a second frequency band in the medium-high frequency band, a center frequency of the second frequency band being greater than a center frequency of the first frequency band.

5. The antenna device according to claim 2, wherein: the first portion comprises a first end portion, the first end portion being directed towards the second radiator; The second radiator comprises a third end and a fourth end, the third end is grounded, and the fourth end is towards the first part; The first excitation signal is also used to excite the second radiator and the first part to generate a third resonant mode of one-half wavelength, and the third resonant mode covers N77 and N78 frequency bands of 5G communication; In the third resonant mode, the second radiator generates a resonant current from the third end to the fourth end, and the first part generates a resonant current from the first end to the first feeding point.

6. The antenna device of claim 2, wherein: The second excitation signal is used to excite the second part to generate a fourth resonant mode of one-quarter wavelength from the ground to the second feeding point, and the fourth resonant mode covers a low frequency band.

7. The antenna device of claim 2, wherein, The first ground is grounded through a band-pass filter circuit; The second excitation signal is also used to excite the second part to generate a fifth resonant mode of one-quarter wavelength from the first ground to the second end, and the fifth resonant mode covers a third frequency band in a medium-high frequency band.

8. The antenna device of claim 7, wherein: The second excitation signal is also used to excite the second part to generate the sixth resonant mode of three-quarters of a wavelength, and the sixth resonant mode covers a fourth frequency band in the medium-high frequency band, and a center frequency of the fourth frequency band is greater than a center frequency of the third frequency band.

9. The antenna device of claim 2, wherein, The second antenna also covers WiFi communication.

10. The antenna device of claim 9, wherein, The second excitation signal is used to excite the second part to generate a seventh resonant mode of one-quarter wavelength from the second feeding point to the second end, and the seventh resonant mode covers a fifth frequency band of WiFi communication.

11. The antenna device of claim 10, wherein: The eighth resonant mode covers a sixth frequency band of WiFi communication, and a center frequency of the sixth frequency band is greater than a center frequency of the fifth frequency band.

12. The antenna device of claim 11, wherein: The center frequency of the fifth frequency band is 5.3 GHz; The center frequency of the sixth frequency band is 5.8 GHz.

13. The antenna device according to any one of claims 2 to 12, characterized in that Further comprising: A first filter circuit, the first feed source is electrically connected with the first feeding point through the first filter circuit.

14. The antenna device of claim 13, wherein, The first filter circuit comprises: A first capacitor, one end of the first capacitor is electrically connected with the first feeding point; A first inductor, one end of the first inductor is electrically connected with the other end of the first capacitor, and the other end of the first inductor is electrically connected with the first feed source; A second capacitor, one end of the second capacitor is electrically connected between the first capacitor and the first feeding point, and the other end of the second capacitor is grounded; A second inductor, one end of the second inductor is electrically connected between the first capacitor and the first feeding point, and the other end of the second inductor is grounded.

15. The antenna device according to any one of claims 2 to 12, characterized in that Further comprising: A second filter circuit, the second feed source is electrically connected with the second feeding point through the second filter circuit.

16. The antenna device of claim 15, wherein, The second filter circuit comprises: a third capacitor, one end of the third capacitor being electrically connected to the second feeding point, and the other end of the third capacitor being electrically connected to the second feed source; a fourth capacitor, one end of the fourth capacitor being electrically connected between the third capacitor and the second feed source, and the other end of the fourth capacitor being grounded.

17. The antenna device according to any one of claims 1 to 12, characterized by The ground part comprises a plurality of sub-ground points arranged at intervals, and each of the sub-ground points is grounded.

18. The antenna device according to any one of claims 1 to 12, characterized in that: The ground part is grounded through a DC blocking capacitor. The first radiator is configured to detect a SAR value of the antenna device.

19. The antenna device according to any one of claims 1 to 12, characterized in that: The frequency range of the low frequency band includes 617 MHz-960 MHz. The frequency range of the medium-high frequency band includes 1710 MHz-2690 MHz.

20. An electronic device, comprising: The antenna device is any one of claims 1 to 19.

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