Antenna device and electronic equipment

Abstract

The embodiment of the invention provides an antenna device and electronic equipment, and the antenna device comprises a first radiator which comprises a grounding part, and a first part and a second part which are located at the two sides of the grounding part, and the grounding part is grounded; a gap is formed between the second radiator and the first part, and the second radiator is 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, and the first antenna covers medium and high frequency bands and 5G communication; and the second part forms a second antenna, and the second antenna covers the low-frequency band and the medium-high-frequency band. According to the antenna device provided by the embodiment of the invention, dual coverage of medium and high frequency bands can be formed, and coverage of 5G communication and low frequency bands can be formed, so that the bandwidth of the antenna device can be expanded, and the communication performance of the antenna device can be improved.

Description

Technical Field

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

[0002] Electronic devices such as smartphones are usually equipped with multiple antennas, such as LB (Lower Band) antennas, MHB (Middle High Band) antennas, WiFi antennas, etc., to achieve corresponding communication functions.

[0003] In the related art, when designing an antenna, due to the limitations of various factors such as the miniaturization of electronic devices, high screen-to-body ratio, and the increasing number of antennas, the antenna performance is often unable to meet the requirements, resulting in difficulties in antenna design. Summary of the invention

[0004] The embodiments of the present application provide an antenna device and an electronic device, which can expand the bandwidth of the antenna device and improve the communication performance of the antenna device.

[0005] An embodiment of the present application provides an antenna device, including:

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

[0007] a second radiator, wherein a gap is provided between the second radiator and the first portion, and the second radiator is 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, and the first antenna covers medium and high frequency bands and 5G communications;

[0009] The second part forms a second antenna, and the second antenna covers a low frequency band and a medium and high frequency band.

[0010] An embodiment of the present application further provides an electronic device, including a housing and an antenna device disposed on the housing, wherein the antenna device is the above-mentioned antenna device.

[0011] The antenna device of the embodiment of the present application can cover the medium and high frequency bands and 5G communication through the first antenna, and can cover the low frequency band and the medium and high frequency bands through the second antenna, thereby forming dual coverage of the medium and high frequency bands, as well as coverage of 5G communication and the low frequency band, thereby expanding the bandwidth of the antenna device and improving the communication performance of the antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

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

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

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

[0016] Figure 4 Schematic diagram of a first resonant current distribution of the antenna device according to an embodiment of the present application.

[0017] Figure 5 Schematic diagram of a second resonant current distribution of the antenna device according to an embodiment of the present application.

[0018] Figure 6 Schematic diagram of a third resonant current distribution of the antenna device according to an embodiment of the present application.

[0019] Figure 7 Schematic diagram of a fourth resonant current distribution of the antenna device according to an embodiment of the present application.

[0020] Figure 8 Schematic diagram of a fifth resonant current distribution of the antenna device according to an embodiment of the present application.

[0021] Fig. 9 Schematic diagram of a sixth resonant current distribution of the antenna device according to an embodiment of the present application.

[0022] Fig.10 Schematic diagram of a seventh resonant current distribution of the antenna device according to an embodiment of the present application.

[0023] Fig.11 Schematic diagram of an eighth resonant current distribution of the antenna device according to an embodiment of the present application.

[0024] Fig.12 FIG. 1 is a schematic diagram of S parameters of an antenna device according to an embodiment of the present application.

[0025] Fig.13 FIG. 1 is a schematic diagram of the isolation between the first antenna and the second antenna of the antenna device according to an embodiment of the present application.

[0026] Fig.14FIG. 4 is a schematic diagram of the total system efficiency of the antenna device according to an embodiment of the present application.

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

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

[0029] Fig.17 A schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0031] The present application provides an antenna device, which can be applied to electronic devices, such as smart phones, tablet computers, gaming devices, AR (Augmented Reality) devices, laptop computers, desktop computing devices, and other devices with wireless communication functions.

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

[0033] 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 they can be antenna radiators in the form of MDA (in-mold molding), or they can be antenna radiators formed by structures such as conductor structures of electronic equipment and metal traces on circuit boards. In practical applications, the first radiator 10 and the second radiator 20 can be antenna radiators of different forms or of the same form. The shape and size of the first radiator 10 and the second radiator 20 can be set according to actual needs.

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

[0035] There is a gap 30 between the second radiator 20 and the first part 11. The second radiator 20 is electromagnetically coupled to the first part 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 the electronic device to achieve grounding. In an example of practical application, it can be set that one end of the second radiator 20 away from the gap 30 is grounded.

[0036] The second radiator 20 and the first part 11 can form a first antenna together through electromagnetic coupling. The first antenna can cover the middle and high frequency band (Middle High Band, MHB) and 5G communication. In some embodiments, the frequency range of the middle and high frequency band includes 1710MHz to 2690MHz.

[0037] The second portion 12 of the first radiator 10 forms a second antenna. The second antenna can cover a low frequency band (LowBand, LB) and a medium and high frequency band. In some embodiments, the frequency range of the low frequency band includes 617 MHz to 960 MHz.

[0038] The antenna device 100 of the embodiment of the present application can cover the medium and high frequency bands and 5G communication through the first antenna, and can cover the low frequency band and the medium and high frequency bands through the second antenna, thereby forming double coverage of the medium and high frequency bands, as well as coverage of 5G communication and the low frequency band, thereby expanding the bandwidth of the antenna device and improving the communication performance of the antenna device.

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

[0040] The antenna device 100 further includes a first feed source 41 and a second feed source 42. In practical applications, the first feed source 41 and the second feed source 42 may be disposed on a circuit board of the electronic device, such as a main board, or may be disposed on a separate small board.

[0041] Among them, the first feed source 41 is electrically connected to the first feeding point 111. The first feed source 41 is used to provide a first excitation signal, and feed the first excitation signal to the first antenna through the first feeding point 111 to excite the first antenna to resonate, thereby covering the medium and high frequency bands and 5G communications. In practical applications, the first excitation signal may include a 4G communication excitation signal, a 5G communication excitation signal, etc., for example, an LTE (Long Term Evolution) excitation signal and an NR (New Radio) excitation signal.

[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 feed 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 medium and high frequency band. In practical applications, the second excitation signal may include a 4G communication excitation signal, for example, 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 the present application.

[0044] The antenna device 100 further 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, thereby 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 filtering 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 feeding 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 feeding 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 feeding 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, one end of the parallel connection is electrically connected between the first capacitor C1 and the first feeding point 111, and the other end of the parallel connection is grounded.

[0048] In practical applications, the capacitance values ​​of the first capacitor C1 and the second capacitor C2 can be set as required, and the inductance values ​​of the first inductor L1 and the second inductor L2 can also be set as required 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 further includes a second filtering circuit 52. The second filtering circuit 52 is disposed between the second feed source 42 and the second feeding point 121. The second feed source 42 is electrically connected to the second feeding point 121 through the second filtering circuit 52. The second filtering circuit 52 can also be used to filter out interference signals to avoid mutual influence 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 filtering 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 third structural schematic diagram of the antenna device 100 according to an embodiment of the present application.

[0053] The first portion 11 of the first radiator 10 includes a first end portion 112, and the second portion 12 includes a second end portion 122. Both the first end portion 112 and the second end portion 122 are away from the ground portion 13. The first end portion 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 the electronic device to achieve grounding. The fourth end 22 faces the first portion 11 of the first radiator 10. It can be understood that 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 an example of practical application, the first grounding point 123 is located between the ground portion 13 and the second feeding point 121, and the second grounding point 124 is located between the ground portion 13 and the first grounding point 123. In this case, the second grounding point 124, the first grounding point 123, and the second feeding point 121 are spaced apart in sequence in a direction away from the ground portion 13.

[0056] The first grounding point 123 and the second grounding point 124 are both grounded, for example, both 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 grounding point 123, and the other end is grounded. The first grounding point 123 is grounded through the bandpass filter circuit 53. In an 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 grounding 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. Among them, 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 grounding point 123 according to actual needs, for example, a tuning switch is set between the third inductor L3 and the 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, which is disposed between the sixth capacitor C6 and the ground. In practical applications, the switch 54 may be a tuning switch, and the switch 54 may 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 connects to different tuning paths, different impedances are presented, so that the second antenna resonates in different frequency bands.

[0060] The following is a detailed description of the antenna device 100 in an embodiment of the present application, in which the first antenna covers medium and high frequency bands and 5G communications, and the second antenna covers low frequency bands and medium and high frequency bands.

[0061] In some embodiments, reference Figure 4 , Figure 4Schematic diagram of a first resonant current distribution of the antenna device 100 according to an embodiment of the present application.

[0062] The first excitation signal provided by the first feed source 41 is used to excite the first part 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 112, and the first resonant mode covers the first frequency band in the medium and high frequency bands, and the wavelength is the wavelength corresponding to the center frequency of the first frequency band. In an example of practical application, the center frequency of the first frequency band can be 1.8 GHz. Among them, the first resonant mode forms a first resonant current I1 in the first part 11, and the first resonant current I1 is from the ground portion 13 to the first end 112.

[0063] In some embodiments, reference Figure 5 , Figure 5 Schematic diagram of a second resonant current distribution of the antenna device 100 according to an embodiment of the present 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 feeding point 111 to the first end 112, and the second resonant mode covers a second frequency band in the medium and high frequency bands, and the wavelength is the wavelength corresponding to the center frequency of the second frequency band. In an 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. Among them, the second resonant mode forms a second resonant current I2 in the first part 11, and the second resonant current I2 is from the first feeding point 111 to the first end 112.

[0065] In some embodiments, reference Figure 6 , Figure 6 FIG. 1 is a schematic diagram of a third resonant current distribution of the antenna device 100 according to an embodiment of the present application.

[0066] The first excitation signal is also used to excite the second radiator 20 and the first part 11 of the first radiator 10 to jointly generate a third resonance mode. The third resonance mode is a half-wavelength mode, and the third resonance mode covers the N77 band and the N78 band of 5G communication. The wavelength is the center frequency of the N77 band or the center frequency of the N78 band, for example, the center frequency can be 3.5GHz. Among them, the frequency range of the N77 band is 3.3GHz to 4.2GHz, and the frequency range of the N78 band is 3.3GHz to 3.8GHz. In the third resonance mode, the second radiator 20 generates a third resonance current I3, and the third resonance current I3 is from the third end 21 to the fourth end 22; the first part 11 of the first radiator 10 generates a fourth resonance current I4, and the fourth resonance current I4 is from the first end 112 to the first feeding point 111. The third resonance current I3 is in the same direction as the fourth resonance current I4.

[0067] In some embodiments, reference Figure 7 , Figure 7 Schematic diagram of a fourth resonant current distribution of the antenna device 100 according to an embodiment of the present 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 portion 13 to the second feeding point 121. The fourth resonant mode covers a low-frequency band, and the wavelength is a wavelength corresponding to the center frequency of the covered low-frequency band. For example, the center frequency can be 0.8 GHz. The fourth resonant mode forms a fifth resonant current I5 in the second part 12, and the fifth resonant current I5 is from the ground portion 13 to the second feeding point 121.

[0069] In actual applications, low-frequency bands may include LTE's 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), B8 (uplink frequency 880MHz~915MHz, downlink frequency 925MHz~960MHz) and other frequency bands.

[0070] It can be understood that since the low-frequency band includes more frequency bands, in practical applications, the low-frequency band covered by the fourth resonance mode can be switched by switch 54; when a tuning switch is provided on the grounding path of the first grounding point 123, the low-frequency band covered by the fourth resonance mode can also be switched by the tuning switch, or the low-frequency band covered by the fourth resonance mode can be switched together by the tuning switch and switch 54.

[0071] In some embodiments, reference Figure 8 , Figure 8 Schematic diagram of a fifth resonant current distribution of the antenna device 100 according to an embodiment of the present application.

[0072] The second excitation signal is also used to excite the second part 12 to generate a fifth resonance mode. The fifth resonance mode is a quarter-wavelength mode from the first ground point 123 to the second end 122. The fifth resonance mode covers the third frequency band in the medium and high frequency bands, and the wavelength is the wavelength corresponding to the center frequency of the third frequency band. In an example of practical application, the center frequency of the third frequency band can be 2.1 GHz. Among them, the fifth resonance mode forms a sixth resonance current I6 in the second part 12, and the sixth resonance current I6 is from the first ground point 123 to the second end 122.

[0073] In some embodiments, reference Fig. 9 , Fig. 9 Schematic diagram of a sixth resonant current distribution of the antenna device 100 according to an embodiment of the present application.

[0074] The second excitation signal is also used to excite the second part 12 to generate a sixth resonance mode. The sixth resonance mode is a three-quarter wavelength mode, and the sixth resonance mode covers the fourth frequency band in the medium and high frequency bands, and the wavelength is the wavelength corresponding to the center frequency of the fourth frequency band. In an example of practical application, 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 resonance mode, the second part 12 generates a seventh resonance current I7, an eighth resonance current I8 and a ninth resonance current I9. The seventh resonance current I7 is from the second grounding point 124 to the grounding portion 13, the eighth resonance current I8 is from the second grounding point 124 to the first grounding point 123, and the ninth resonance current I9 is ​​from the first grounding point 123 to the second end 122. The eighth resonance current I8 and the ninth resonance current I9 are in the same direction, and the seventh resonance current I7 is in the opposite direction to the eighth resonance current I8 and the ninth resonance 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 source 42 may also include a WiFi excitation signal. Therefore, the antenna device 100 can simultaneously cover low frequency bands, medium and high frequency bands, 5G communication, and WiFi communication, which can enrich the communication mode of the antenna device 100.

[0077] In some embodiments, reference Fig.10 , Fig.10 Schematic diagram of a seventh resonant current distribution of the antenna device 100 according to an embodiment of the present 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 feeding point 121 to the second end 122. The seventh resonant mode covers the fifth frequency band of WiFi communication, and the wavelength is the wavelength corresponding to the center frequency of the fifth frequency band. In an example of practical application, the center frequency of the fifth frequency band is 5.3 GHz. Among them, 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 feeding point 121 to the second end 122 .

[0079] In some embodiments, reference Fig.11 , Fig.11 Schematic diagram of an eighth resonant current distribution of the antenna device 100 according to an embodiment of the present application.

[0080] The second excitation signal is also used to excite the second part 12 to generate an eighth resonance mode. The eighth resonance mode is a full wavelength mode, and the eighth resonance mode covers the sixth frequency band of WiFi communication, and the wavelength is the wavelength corresponding to the center frequency of the sixth frequency band. In an example of practical application, 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 resonance mode, the second part 12 generates an eleventh resonance current I 11 , the twelfth resonant current I 12 、Thirteenth resonant current I 13 and the fourteenth resonant current I 14 . The eleventh resonant current I 11 From the grounding portion 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 The thirteenth resonant current I 13 From the second end 122 to the second feeding point 121, the fourteenth resonant current I 14 From the second feeding point 124 to the first grounding point 123, the thirteenth resonant current I 13 With the fourteenth resonant current I 14 The eleventh resonant current I 11 , the twelfth resonant current I 12 With the thirteenth resonant current I 13 , the fourteenth resonant current I 14 Reverse.

[0082] It can be understood that the second excitation signal can excite the second part 12 to simultaneously generate the seventh resonance mode and the eighth resonance mode, thereby being able to simultaneously cover two different frequency bands of WiFi communication, that is, simultaneously cover the fifth frequency band and the sixth frequency band of WiFi communication, thereby being able to expand the bandwidth of WiFi communication and improve the WiFi communication performance of the antenna device 100.

[0083] refer to Figure 12 to Figure 14 , Fig.12 is a schematic diagram of S parameters of the antenna device 100 according to an embodiment of the present application, Fig.13 Schematic diagram of the isolation between the first antenna and the second antenna of the antenna device 100 according to an embodiment of the present application. Fig.14 FIG. 1 is a schematic diagram of the total system efficiency of the antenna device 100 according to an embodiment of the present application.

[0084] like Fig.12 As shown, curve L1 is an S parameter curve of a first antenna formed by the second radiator 20 and the first portion 11 of the first radiator 10 , and curve L2 is an S parameter curve of a second antenna formed by the second portion 12 of the first radiator 10 .

[0085] Among them, mark point 1 is the center frequency of the first resonance mode generated by the first antenna, which is about 1.8641GHz, covering the medium and high frequency bands. Mark point 2 is the center frequency of the second resonance mode generated by the first antenna, which is about 2.6064GHz, covering the medium and high frequency bands. Mark point 3 is the center frequency of the third resonance mode generated by the first antenna, which is about 3.5362GHz, covering the N77 and N78 bands of 5G communication.

[0086] Marking point 4 is the center frequency of the fourth resonance mode generated by the second antenna, which is approximately 0.8788 GHz and covers the low frequency band. Marking point 5 is the center frequency of the fifth resonance mode generated by the second antenna, which is approximately 2.1945 GHz and covers the medium and high frequency bands. Marking point 6 is the center frequency of the sixth resonance mode generated by the second antenna, which is approximately 2.755 GHz and covers the medium and high frequency bands. Marking point 7 is the first example of the center frequency of the seventh resonance mode generated by the second antenna, which is approximately 5.1681 GHz and covers WiFi communication. Marking point 8 is the second example of the center frequency of the seventh resonance mode generated by the second antenna, which is approximately 5.3738 GHz and covers WiFi communication. Marking point 9 is the center frequency of the eighth resonance mode generated by the second antenna, which is approximately 5.7911 GHz and covers WiFi communication.

[0087] It should be noted that the center frequencies corresponding to the above-mentioned marking points 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-mentioned resonance modes.

[0088] like Fig.13 As shown in the figure, the mark point 1 represents the isolation between the first antenna and the second antenna at 2.2003GHz in the mid-high frequency band, which is about -10.991dB. The mark point 2 represents the isolation between the first antenna and the second antenna at 2.7369GHz in the mid-high frequency band, which is about -12.744dB. As can be seen from the figure, although the first antenna and the second antenna both cover the mid-high frequency band, there is good isolation between the first antenna and the second antenna, which can ensure the radiation performance of the first antenna and the second antenna.

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

[0090] Among them, the marked point 1 is the total system efficiency of the first resonance mode generated by the first antenna, the center frequency of which is about 1.867GHz, and the radiation efficiency is about -1.8034dB. The marked point 2 is the total system efficiency of the second resonance mode generated by the first antenna, the center frequency of which is about 2.5845GHz, and the radiation efficiency is about -2.5732dB. The marked point 3 is the total system efficiency of the third resonance mode generated by the first antenna, the center frequency of which is about 3.5151GHz, and the radiation efficiency is about -2.867dB.

[0091] Marking point 4 is the total system efficiency of the fourth resonance mode generated by the second antenna, with a center frequency of approximately 0.9 GHz and a radiation efficiency of approximately -7.2858 dB. Marking point 5 is the total system efficiency of the fifth resonance mode generated by the second antenna, with a center frequency of approximately 2.1952 GHz and a radiation efficiency of approximately -6.384 dB. Marking point 6 is the total system efficiency of the sixth resonance mode generated by the second antenna, with a center frequency of approximately 2.78 GHz and a radiation efficiency of approximately -7.1189 dB. Marking point 7 is the total system efficiency of the seventh resonance mode generated by the second antenna, with a center frequency of approximately 5.2985 GHz and a radiation efficiency of approximately -2.445 dB. Marking point 8 is the total system efficiency of the eighth resonance mode generated by the second antenna, with a center frequency of approximately 5.8047 GHz and a radiation efficiency of approximately -3.4815 dB. It can be seen from the figure that the first antenna and the second antenna have good radiation efficiency in each resonance mode.

[0092] In some embodiments, reference Fig.15 , Fig.15 1 is a fourth structural diagram of the antenna device 100 of the embodiment of the present 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 portion 13, and the other end is grounded. Therefore, the grounding portion 13 can be grounded through the seventh capacitor C7.

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

[0094] It can be understood that configuring the first radiator 10 to detect the SAR value of the antenna device 100 can achieve reuse of the first radiator 10 without the need to separately set up a SAR sensor, thereby saving layout space inside the electronic device and also saving costs.

[0095] In practical applications, the antenna device 100 may further include an eighth capacitor C8. The capacitance value of the eighth capacitor C8 may be set according to actual needs. One end of the eighth capacitor C8 is electrically connected to the first feeding point 111, and the other end is electrically connected to the first filtering circuit 51. Therefore, the first feeding point 111 can be electrically connected to the first feed source 41 through the eighth capacitor C8 and the first filtering 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 feeding point 111 is electrically connected to the first feed source 41 through the DC blocking capacitor C8, the second feeding point 121 is electrically connected to the second feed source 42 through the DC blocking capacitor C3, the first grounding point 123 is grounded through the DC blocking capacitor C5, and the second grounding point 124 is grounded through the DC blocking capacitor C6. Therefore, it can be ensured that the first radiator 10 is a suspended radiator, so that the first radiator 10 meets the requirements of detecting the SAR value.

[0097] In some embodiments, reference Fig.16 , Fig.16 1 is a fifth structural diagram of the antenna device 100 of an embodiment of the present application. The grounding portion 13 includes a plurality of sub-grounding points arranged at intervals, and each sub-grounding point is grounded. For example, in a feasible example, the grounding portion 13 includes three sub-grounding points 131, 132, and 133 arranged at intervals, the sub-grounding point 131 is grounded through a capacitor C71, the sub-grounding point 132 is grounded through a capacitor C72, and the sub-grounding point 133 is grounded through a capacitor C73.

[0098] In practical applications, the more sub-grounding points the grounding portion 13 includes, the greater the improvement in isolation between the first antenna and the second antenna. Therefore, by setting the grounding portion 13 to include a plurality of 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] It can be understood that in actual applications, the above-mentioned capacitors C71, C72, and C73 can all be DC blocking capacitors to ensure that the DC signal on the first radiator 10 does not return to the ground, so that the first radiator 10 is a suspended radiator to meet the requirements of detecting SAR values.

[0100] An embodiment of the present application also provides an electronic device, which may be, for example, a smart phone, a tablet computer, a gaming device, an AR (Augmented Reality) device, a laptop computer, a desktop computing device, or other device with a wireless communication function.

[0101] refer to Fig.17 , Fig.17 1 is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. The electronic device includes an antenna device 100 and a housing 200 .

[0102] The shell 200 can form the overall outline of the electronic device and set various functional components of the electronic device. For example, the motherboard, battery and other functional components of the electronic device can be set inside the shell 200, and the display module, camera module and other functional components can be set on the shell 200.

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

[0104] It should be noted that in the embodiments of the present application, "electrical connection" can be achieved by direct connection between two electrical components to achieve electrical connection, or it can be achieved by indirect connection to achieve electrical connection. For example, A and B are electrically connected, which can be achieved by direct connection between A and B, or it can be achieved by indirect connection between A and B 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 only used to distinguish similar objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0106] The antenna device and electronic device provided in the embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. An antenna device, characterized in that: include: A first radiator, the first radiator comprising a grounding portion and a first part and a second part located on both sides of the grounding portion, the grounding portion being grounded; a second radiator, wherein a gap is provided between the second radiator and the first portion, and the second radiator is grounded; 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, and the first antenna covers medium and high frequency bands and 5G communications; The second part forms a second antenna, and the second antenna covers a low frequency band and a medium and high frequency band.

2. The antenna device according to claim 1, characterized in that The first portion includes a first feeding point, the second portion includes a second feeding point, and the antenna device further includes: a first feed source, electrically connected to the first feeding point, and configured to feed a first excitation signal to the first antenna through the first feeding point to excite the first antenna to resonate; A second feed source is electrically connected to the second feeding point, and the second feed source is used to feed a second excitation signal to the second antenna through the second feeding point to excite the second antenna to resonate.

3. The antenna device according to claim 2, characterized in that: The first portion includes a first end portion, the first end portion facing the second radiator; The first excitation signal is used to excite the first portion to generate a first resonance mode of a quarter wavelength from the ground portion to the first end portion, and the first resonance mode covers a first frequency band in the middle and high frequency bands.

4. The antenna device according to claim 3, characterized in that: The first excitation signal is also used to excite the first part to generate a second resonance mode of a quarter wavelength from the first feeding point to the first end, the second resonance mode covers a second frequency band in the mid-high frequency band, and the center frequency of the second frequency band is greater than the center frequency of the first frequency band.

5. The antenna device according to claim 2, characterized in that: The first portion includes a first end portion, the first end portion facing the second radiator; The second radiator includes a third end and a fourth end, the third end is grounded, and the fourth end faces the first portion; The first excitation signal is further used to excite the second radiator and the first part to jointly generate a third resonance mode of half wavelength, and the third resonance mode covers the N77 frequency band and the N78 frequency band of 5G communication; In the third resonance mode, the second radiator generates a resonance current from the third end to the fourth end, and the first part generates a resonance current from the first end to the first feeding point.

6. The antenna device according to claim 2, characterized in that: The second excitation signal is used to excite the second part to generate a fourth resonance mode of a quarter wavelength from the ground portion to the second feeding point, and the fourth resonance mode covers a low frequency band.

7. The antenna device according to claim 2, characterized in that: The second part includes a second end and a first grounding point, the second end is far away from the grounding portion, the first grounding point is located between the grounding portion and the second feeding point, and the first grounding point is grounded through a bandpass filter circuit; The second excitation signal is further used to excite the second part to generate a fifth resonance mode of a quarter wavelength from the first ground point to the second end, and the fifth resonance mode covers the third frequency band in the middle and high frequency bands.

8. The antenna device according to claim 7, characterized in that: The second part further includes a second grounding point, the second grounding point is located between the grounding portion and the first grounding point, and the second grounding point is grounded; The second excitation signal is further used to excite the second part to generate a sixth resonance mode of three-quarter wavelength, wherein the sixth resonance mode covers a fourth frequency band in the medium and high frequency bands, and the center frequency of the fourth frequency band is greater than the center frequency of the third frequency band; In the sixth resonance mode, the second part generates a resonant current from the second ground point to the ground portion, and generates a same-direction resonant current from the second ground point to the first ground point and from the first ground point to the second end.

9. The antenna device according to claim 2, characterized in that: The second antenna also covers WiFi communication.

10. The antenna device according to claim 9, characterized in that: The second portion includes a second end, the second end being away from the ground portion; The second excitation signal is used to excite the second part to generate a seventh resonance mode of a quarter wavelength from the second feeding point to the second end, and the seventh resonance mode covers the fifth frequency band of WiFi communication.

11. The antenna device according to claim 10, characterized in that: The second part further includes a first grounding point and a second grounding point, the first grounding point is located between the grounding portion and the second feeding point, the second grounding point is located between the grounding portion and the first grounding point, and the first grounding point and the second grounding point are both grounded; The second excitation signal is further used to excite the second part to generate an eighth resonance mode of a whole wavelength, wherein the eighth resonance 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; In the eighth resonance mode, the second part generates a co-directional resonant current from the ground portion to the second grounding point and from the second grounding point to the first grounding point, and generates a co-directional resonant current from the second end to the second feeding point and from the second feeding point to the first grounding point.

12. The antenna device according to claim 11, characterized in that: 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: Also includes: A first filtering circuit, wherein the first feed source is electrically connected to the first feeding point through the first filtering circuit.

14. The antenna device according to claim 13, characterized in that: The first filtering circuit comprises: A first capacitor, one end of which is electrically connected to the first feeding point; A first inductor, one end of the first inductor is electrically connected to the other end of the first capacitor, and the other end of the first inductor is electrically connected to 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: Also includes: A second filtering circuit, wherein the second feed source is electrically connected to the second feeding point through the second filtering circuit.

16. The antenna device according to claim 15, characterized in that: The second filtering 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 is electrically connected between the third capacitor and the second feed source, and the other end of the fourth capacitor is grounded.

17. The antenna device according to any one of claims 1 to 12, characterized in that: The grounding portion includes a plurality of sub-grounding points arranged at intervals, and each of the sub-grounding points is grounded.

18. The antenna device according to any one of claims 1 to 12, characterized in that: The grounding portion is grounded via 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 617MHz to 960MHz; The frequency range of the medium and high frequency band includes 1710 MHz to 2690 MHz.

20. An electronic device, characterized in that: It comprises a shell and an antenna device arranged on the shell, and the antenna device is the antenna device according to any one of claims 1 to 19.

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