Antenna device and electronic equipment

Abstract

The invention provides an antenna device and electronic equipment, and the distance between a first feeding point of a first radiator and a first free end is smaller than or equal to one fifth of the length of a branch knot between the first free end and a first grounding end. The first feed source is electrically connected to the first feed point and excites the first radiator to generate a first resonance mode supporting a GPS signal and form a first resonance current; the filter circuit is electrically connected between the first feed source and the first feeding point; the second radiator and the first radiator form a coupling gap and are grounded. The second feed source is electrically connected to the second radiator and excites the second radiator to form a second resonance current. The second resonance current is used for being electromagnetically coupled to the first radiator and returning to the ground through the filter circuit. Therefore, the first radiator provided by the invention has better GPS performance when supporting the GPS signal.

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] With the development of communication technology, antenna devices and electronic devices such as smart phones can realize more and more functions, and the communication modes of antenna devices and electronic devices are also more diverse. Each communication mode requires a corresponding antenna to support it.

[0003] However, due to the limitation of the internal space of electronic devices, the GPS antennas of electronic devices in related technologies have problems such as low efficiency and low upper hemisphere occupancy. Therefore, there is an urgent need to provide a GPS antenna solution with better performance. Summary of the invention

[0004] The present application provides an antenna device and an electronic device, wherein the antenna device and the electronic device have better GPS performance.

[0005] In a first aspect, the present application provides an antenna device, comprising:

[0006] A first radiator, comprising a first free end, a first feeding point and a first grounding end, wherein the first grounding end is grounded, and a distance between the first feeding point and the first free end is less than or equal to one fifth of a branch length between the first free end and the first grounding end;

[0007] A first feed source, electrically connected to the first feeding point, the first feed source is used to excite the first radiator to generate a first resonance mode and form a first resonance current, the first resonance mode is used to support GPS signals;

[0008] A filter circuit, electrically connected between the first feed source and the first feed point;

[0009] A second radiator includes a second free end, a second feeding point, and a second ground end, wherein a coupling gap is formed between the second free end and the first free end, and the second ground end extends in a direction away from the first radiator and is grounded; and

[0010] A second feed source is electrically connected to the second feed point, and the second feed source is used to excite the second radiator to form a second resonant current; wherein,

[0011] The second resonant current is used for electromagnetic coupling to the first radiator and returning to the ground through the filter circuit.

[0012] In a second aspect, the present application also provides an electronic device, comprising the antenna device as described above.

[0013] In the antenna device and electronic device of the present application, the first radiator and the second radiator form a mouth-to-mouth antenna radiation structure. The second resonant current generated by the second radiator excited by the second feed source can be returned to the ground through the filter circuit. Since the distance between the first feeding point and the first free end is less than or equal to one-fifth of the branch length between the first free end and the first grounding end, the first feeding point is arranged near the first free end. The second resonant current returned to the ground from the filter circuit basically does not pass through the first radiator. The second resonant current is not easy to interfere with the first radiator. The first radiator is less interfered when supporting GPS signals, and the GPS performance of the antenna device is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 A first structural schematic diagram of an antenna device provided in an embodiment of the present application.

[0016] Figure 2 A schematic diagram of current distribution when the antenna device provided in an embodiment of the present application is not provided with a filtering circuit.

[0017] Figure 3 S parameter curves and isolation curves of the first antenna and the second antenna when the antenna device provided in the embodiment of the present application is not provided with a filtering circuit.

[0018] Figure 4 A schematic diagram of current distribution of a filter circuit provided in an antenna device provided in an embodiment of the present application.

[0019] Figure 5 The S parameter curve and isolation curve of the first antenna after the antenna device provided by the embodiment of the present application is provided with a filtering circuit.

[0020] Figure 6 A second structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0021] Figure 7 A schematic diagram of current distribution of a filter circuit and a capacitive load circuit provided in an antenna device provided in an embodiment of the present application.

[0022] Figure 8 A schematic diagram comparing S parameter curves of the first antenna when the antenna device provided in an embodiment of the present application is provided with a filter circuit but not a capacitive load circuit and when the antenna device is provided with both a filter circuit and a capacitive load circuit.

[0023] Fig. 9 A schematic diagram comparing the antenna efficiencies of the first antenna when the antenna device provided in an embodiment of the present application is provided with a filter circuit but not a capacitive load circuit and when the antenna device is provided with both a filter circuit and a capacitive load circuit.

[0024] Fig.10 A schematic diagram of the front-to-back ratio of the radiation direction of the first antenna when the antenna device provided in an embodiment of the present application is provided with a filter circuit but not a capacitive load circuit.

[0025] Fig.11 A schematic diagram of the front-to-back ratio of the radiation direction of the first antenna when the antenna device provided in an embodiment of the present application is provided with a filter circuit and a capacitive load circuit.

[0026] Fig.12 A schematic diagram of the upper hemisphere ratio of the first antenna when the antenna device provided in an embodiment of the present application is provided with a filter circuit but not a capacitive load circuit.

[0027] Fig.13 A schematic diagram of the upper hemisphere occupancy of the first antenna when the antenna device provided in an embodiment of the present application is provided with a filter circuit and a capacitive load circuit.

[0028] Fig.14 A third structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0029] Fig.15 A fourth structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0030] Fig.16 A first structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0031] Fig.17 A second structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The following will be combined with the attached examples of the present application Figure 1 To Attachment Fig.17 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not 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.

[0033] The embodiments of the present application provide an antenna device and an electronic device. The antenna device can realize a wireless communication function. For example, the antenna device can transmit, but is not limited to, Wireless Fidelity (Wi-Fi) signals, Global Positioning System (GPS) signals, third-generation mobile communication technology (3rd-Generation, 3G), fourth-generation mobile communication technology (4th-Generation, 4G), fifth-generation mobile communication technology (5th-Generation, 5G), near field communication (NFC), Bluetooth (BT), ultra-wideband (UWB) signals, etc.

[0034] Among them, please refer to Figure 1 , Figure 1 This is a first structural schematic diagram of an antenna device 100 provided in an embodiment of the present application. The antenna device 100 includes a first radiator 110 , a second radiator 120 , a first feed source 130 , a second feed source 140 and a filter circuit 150 .

[0035] The first radiator 110 includes a first free end 111, a first feeding point 112 and a first grounding end 113. The first grounding end 113 can be electrically connected to the ground system 170 to achieve grounding. The first free end 111 can be the end or an open end of the first radiator 110. The first feeding point 112 can be arranged near the first free end 111. The second radiator 120 includes a second free end 121, a second feeding point 122 and a second grounding end 123. The second free end 121 can be the end or an open end of the second radiator 120. The second grounding end 123 can be electrically connected to the ground system 170 to achieve grounding. A coupling gap is formed between the second free end 121 and the first free end 111. The second grounding end 123 extends in a direction away from the first radiator 110 and is grounded. The first radiator 110 and the second radiator 120 can form a mouth-to-mouth radiation structure. The first feed source 130 is directly or indirectly electrically connected to the first feed point 112. The first feed source 130 can provide a first excitation signal and excite the first radiator 110 to generate a first resonance mode and form a first resonance current. The first resonance mode is used to support GPS signals. The first feed source 130 and the first radiator 110 can form a first antenna and support GPS signals. The second feed source 140 is directly or indirectly electrically connected to the second feed point 122. The second feed source 140 can provide a second excitation signal and excite the second radiator 120 to generate a second resonance mode and form a second resonance current. The second resonance mode can support wireless signals such as but not limited to medium and high frequency wireless signals. The second feed source 140 and the second radiator 120 can form a second antenna and receive and transmit wireless signals. Among them, the filter circuit 150 is directly or indirectly electrically connected between the first feed source 130 and the first feed point 112. The second resonance current is used to electromagnetically couple to the first radiator 110 and return to the ground through the filter circuit 150.

[0036] It can be understood that electromagnetic coupling is also called capacitive coupling, which means that when an electric field is generated between two radiators, the signal on one radiator can be transmitted to the other radiator through the electric field, so that the two radiators can also achieve electrical signal conduction without direct contact or direct connection. In the embodiment of the present application, the second resonant current generated by the excitation of the second feed source 140 can be capacitively coupled between the first radiator 110 and the second radiator 120 and returned to the ground through the filter circuit 150.

[0037] It is understandable that both the first radiator 110 and the second radiator 120 can be radiating devices with conductor structures. The first radiator 110 and the second radiator 120 can be, but are not limited to, straight strips, bends, or other shapes, and the extension directions of the first radiator 110 and the second radiator 120 can be the same or different. The embodiment of the present application does not limit the specific shapes of the first radiator 110 and the second radiator 120.

[0038] It can be understood that the ground system 170 can form a common ground for the antenna device 100 or the electronic device. The ground system 170 can be a plane or structure with zero electric potential. For example, the ground system 170 can be formed by a conductor, a printed circuit, or a metal printed layer in the antenna device 100 or the electronic device; for another example, the ground system 170 can be formed on a main board, a small board, or other supporting board of the antenna device 100 or the electronic device; for another example, the ground system 170 can also be formed on the frame of the antenna device 100 or the electronic device (such as the middle plate 320 described later). The specific setting position of the ground system 170 is not limited in the embodiment of the present application.

[0039] It can be understood that the filter circuit 150 can be, but is not limited to, a circuit structure formed by an indefinite number of capacitors, inductors, switches and other components. The filter circuit 150 can block the resonant current of a specific frequency from passing through and allow the resonant current of other frequencies to pass through. In the embodiment of the present application, the second resonant current can be electromagnetically coupled to the first radiator 110 and return to the ground through the filter circuit 150. The second resonant current can avoid flowing on the first radiator 110 and affecting the performance of the first radiator 110; at the same time, the second resonant current returning to the ground through the filter circuit 150 is not easy to flow to the first feed source 130 and affect the performance of the first feed source 130; thus, under the action of the filter circuit 150, the second resonant current has less interference on the first radiator 110 and the first feed source 130, and the first antenna formed by the first radiator 110 and the first feed source 130 has better GPS performance when supporting GPS signals. It should be noted that the first resonant current formed by the excitation of the first feed source 130 can still pass through the filter circuit 150 and flow to the first radiator 110, that is, the first resonant current does not return to the ground through the filter circuit 150.

[0040] It is understandable that if Figure 1As shown, when the first feeding point 112 of the first radiator 110 is arranged near the first free end 111, the second resonant current has less interference on the first radiator 110. Here, "arranged near the first free end 111" means that the distance between the first feeding point 112 and the first free end 111 is less than or equal to one-fifth of the length of the branch between the first free end 111 and the first ground end 113 of the first radiator 110. Optionally, the first feeding point 112 can be arranged at the first free end 111. At this time, the first feeding point 112 is closer to the first free end 111. When the second resonant current returns to the ground through the filter circuit 150, the flow area of ​​the second resonant current on the first radiator 110 is smaller, which can further reduce the interference of the second resonant current on the first antenna. It should be noted that, in some embodiments, the second feeding point 122 of the second radiator 120 may also be arranged near the second free end 121. For example, the distance between the second feeding point 122 and the second free end 121 may be less than or equal to one third of the length of the branch between the second free end 121 and the second ground end 123 of the second radiator 120. The specific structure of the second radiator 120 is not limited in the embodiment of the present application.

[0041] Among them, please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram of current distribution when the antenna device 100 provided in the embodiment of the present application is not provided with the filter circuit 150, Figure 3 The S parameter curve and isolation curve of the first antenna and the second antenna when the antenna device 100 provided in the embodiment of the present application is not provided with the filter circuit 150. Figure 2 As shown in FIG. 1( a ), when the antenna device 100 is not provided with the filter circuit 150 , the first resonant current I1 formed by the excitation of the first feed source 130 can be electromagnetically coupled from the first radiator 110 to the second radiator 120 through the coupling gap and flow on the second radiator 120 ; Figure 2 As shown in FIG. 1( b ), when the antenna device 100 is not provided with the filter circuit 150 , the second resonant current I2 excited by the second feed source 140 can be electromagnetically coupled from the second radiator 120 to the first radiator 110 through the coupling gap and flow on the first radiator 110 . Figure 3 The middle curve S1 is an S parameter curve of the first antenna when the antenna device 100 is not provided with the filter circuit 150, the curve S2 is an S parameter curve of the second antenna when the antenna device 100 is not provided with the filter circuit 150, and the curve S3 is an isolation curve of the first antenna and the second antenna when the antenna device 100 is not provided with the filter circuit 150. By comparing the curves S1 to S3, it can be seen that when the antenna device 100 is not provided with the filter circuit 150, the first antenna and the second antenna are coupled to each other, and the isolation between the two is -2dB. At this time, the first antenna and the second antenna have poor isolation characteristics.

[0042] For comparison, see Figure 4 and Figure 5 , Figure 4 A schematic diagram of current distribution when the antenna device 100 provided in an embodiment of the present application is provided with a filter circuit 150, Figure 5 The S parameter curve and isolation curve of the first antenna when the antenna device 100 provided in the embodiment of the present application is provided with the filter circuit 150 are shown in FIG. Figure 4 As shown, when the antenna device 100 is provided with a filter circuit 150 and the first feeding point 112 is provided near the first free end 111, the second resonant current I2 on the second radiator 120 can be returned to the ground through the filter circuit 150, so that the second resonant current I2 basically does not pass through the first radiator 110, which can reduce the impact of the second resonant current I2 on the performance of the first radiator 110. Figure 5 As shown, Figure 5 The middle curve S4 and curve S5 are respectively the S parameter curve and isolation curve of the first antenna when the antenna device 100 is provided with a filter circuit 150 and the first feeding point 112 is provided near the first free end 111. By comparing the curves S1 to S5, it can be seen that when the antenna device 100 is provided with a filter circuit 150 and the first feeding point 112 is provided near the first free end 111, the second resonant current on the second radiator 120 has little effect on the first radiator 110. At this time, the isolation between the first antenna and the second antenna is less than -11dB, and the isolation between the first antenna and the second antenna is good.

[0043] In the antenna device 100 of the embodiment of the present application, the first radiator 110 and the second radiator 120 form a mouth-to-mouth antenna radiation structure. The second resonant current generated by the second radiator 120 excited by the second feed source 140 can be returned to the ground through the filter circuit 150. When the first feeding point 112 is arranged near the first free end 111 and the filter circuit 150 is electrically connected between the first feeding point 112 and the first feed source 130, the second resonant current returned to the ground through the filter circuit 150 basically does not pass through the first radiator 110, so that the second resonant current is not easy to interfere with the first radiator 110, the first antenna is less interfered when supporting the GPS signal, and the GPS performance of the first antenna is better.

[0044] Among them, please refer to Figure 6 , Figure 6 The second structural diagram of the antenna device provided in the embodiment of the present application is as follows: The antenna device 100 may further include a capacitive load circuit 160 .

[0045] The capacitive load circuit 160 is directly or indirectly electrically connected between the filter circuit 150 and the first feed point 112. The capacitive load circuit 160 refers to a circuit or structure that can prevent a specific current from flowing, but the specific current is ahead of the voltage. The capacitive load circuit 160 may include one or more capacitor elements. The capacitive load circuit 160 and the filter circuit 150 may jointly block the first resonant current from being electromagnetically coupled to the second radiator 120. The capacitive load circuit 160 may also tune the first resonant current to further improve the antenna performance when the first antenna supports GPS signals.

[0046] Understandably, please refer to Figure 7 , Figure 7 A schematic diagram of current distribution of the antenna device 100 provided in the embodiment of the present application with the filter circuit 150 and the capacitive load circuit 160 is shown in FIG. Figure 7 As shown, when the antenna device 100 includes the filter circuit 150 and the capacitive load circuit 160 at the same time, the filter circuit 150 and the capacitive load circuit 160 can block the first resonant current I1 from being electromagnetically coupled to the second radiator 120, which can not only reduce the interference of the first resonant current I1 on the second radiator 120, but also make the antenna efficiency of the GPS signal supported by the first radiator 110 better under the excitation of more first resonant current I1.

[0047] Understandably, please refer to Figure 8 and Fig. 9 , Figure 8 A schematic diagram comparing S parameter curves of the first antenna when the antenna device 100 provided in an embodiment of the present application is provided with a filter circuit 150 but not a capacitive load circuit 160 and when the antenna device 100 is provided with both the filter circuit 150 and the capacitive load circuit 160 . Fig. 9 A schematic diagram comparing the antenna efficiencies of the first antenna when the antenna device 100 provided in an embodiment of the present application is provided with a filter circuit 150 but not a capacitive load circuit 160 and when the antenna device 100 is provided with both the filter circuit 150 and the capacitive load circuit 160 . Figure 8 The middle curve S6 and Fig. 9 The middle curve S8 is respectively an S parameter curve and an antenna efficiency curve of the first antenna when the antenna device 100 is provided with the filter circuit 150 but without the capacitive load circuit 160. Figure 8 Curve S7 and Fig. 9The curve S9 in FIG. 1 is respectively an S parameter curve and an antenna efficiency curve of the first antenna when the antenna device 100 is provided with the filter circuit 150 and the capacitive load circuit 160 . By comparing curves S6 to S9, it can be seen that when the antenna device 100 is provided with a filter circuit 150 and a capacitive load circuit 160 at the same time, the second resonant current of the second radiator 120 can be returned to the ground through the filter circuit 150 without passing through the first radiator 110, which can reduce the performance impact of the second antenna on the first antenna. At the same time, the capacitive load circuit 160 is connected in series between the filter circuit 150 and the first radiator 110, and the capacitive load circuit 160 can perform impedance tuning on the first resonant current. At the same time, the capacitive load circuit 160 and the filter circuit 150 can jointly block the first resonant current from flowing to the second radiator 120. Therefore, at this time, under the action of the filter circuit 150 and the capacitive load circuit 160, the GPS signal supported by the first antenna can have a wider bandwidth, and the antenna efficiency of the first antenna is improved by 3-4dB compared with the antenna efficiency when only the filter circuit 150 is provided without the capacitive load circuit 160, and the first antenna has a higher radiation efficiency and a wider bandwidth.

[0048] Also, please refer to Fig.10 and Fig.11 , Fig.10 A schematic diagram of the front-to-back ratio of the radiation direction of the first antenna when the antenna device 100 provided in the embodiment of the present application is provided with the filter circuit 150 but not with the capacitive load circuit 160, Fig.11 A schematic diagram of the front-to-back ratio of the radiation direction of the first antenna when the antenna device 100 provided in the embodiment of the present application is provided with a filter circuit 150 and a capacitive load circuit 160. Fig.10 The middle curve S10 is the front-to-back ratio curve of the radiation direction of the first antenna when the antenna device 100 is provided with the filter circuit 150 but not the capacitive load circuit 160, and the curve S11 is the front-to-back ratio curve of the radiation direction of the first antenna when the antenna device 100 is provided with the filter circuit 150 and the capacitive load circuit 160. It can be seen from the curve S10 that the front-to-back ratio of the radiation direction of the first antenna when the antenna device 100 is provided with the filter circuit 150 but not the capacitive load circuit 160 is 9.4dB; it can be seen from the curve S11 that the front-to-back ratio of the radiation direction of the first antenna when the antenna device 100 is provided with the filter circuit 150 and the capacitive load circuit 160 is 8.6dB. After the antenna device 100 of the present application is provided with the filter circuit 150 and the capacitive load circuit 160, the front-to-back ratio of the first antenna is as small as 8.6dB, the radiation directivity of the first antenna is weakened, and the coverage of the first antenna is more uniform.

[0049] Also, please refer to Fig.12 and Fig.13 , Fig.12A schematic diagram of the upper hemisphere ratio of the first antenna when the antenna device 100 provided in the embodiment of the present application is provided with the filter circuit 150 but not with the capacitive load circuit 160, Fig.13 A schematic diagram of the upper hemisphere ratio of the first antenna when the antenna device 100 provided in the embodiment of the present application is provided with a filter circuit 150 and a capacitive load circuit 160. Fig.12 It can be seen that when the antenna device 100 is provided with the filter circuit 150 but not provided with the capacitive load circuit 160, the upper hemisphere proportion of the first antenna is -3.28 dB, and the upper hemisphere proportion is 47%. Fig.13 It can be seen that when the antenna device 100 is provided with the filter circuit 150 and the capacitive load circuit 160, the upper hemisphere ratio of the first antenna is -3.08 dB, and the upper hemisphere ratio is 50.6%. Therefore, after the antenna device 100 of the present application is provided with the filter circuit 150 and the capacitive load circuit 160, the upper hemisphere ratio of the first antenna is increased from 47% to 50.6%, and the upper hemisphere performance of the first antenna when supporting GPS signals is better.

[0050] In the antenna device 100 of the embodiment of the present application, the first radiator 110 and the second radiator 120 form a mouth-to-mouth antenna radiation structure. The second resonant current generated by the second radiator 120 excited by the second feed source 140 can be returned to the ground through the filter circuit 150. When the first feeding point 112 is arranged near the first free end 111 and the filter circuit 150 is electrically connected between the first feeding point 112 and the first feed source 130, the second resonant current returned to the ground through the filter circuit 150 basically does not pass through the first radiator 110, so that the second resonant current is not easy to interfere with the first radiator 110; at the same time, the capacitive load circuit 160 is electrically connected between the filter circuit 150 and the first feeding point 112, the capacitive load circuit 160 can tune the first resonant current, and the capacitive load circuit 160 can also block the first resonant current together with the filter circuit 150. The first resonant current is electromagnetically coupled to the second radiator 120, which can reduce the interference of the first resonant current on the second radiator 120, and can also make more first resonant current excite the first radiator 110 to support GPS signals. Therefore, compared with the solution without setting the capacitive load circuit 160, the antenna device 100 of the present application with the filter circuit 150 and the capacitive load circuit 160 can make the bandwidth of the first antenna formed by the first feed source 130 and the first radiator 110 wider, the antenna efficiency is improved by 3-4dB, the front-to-back ratio of the first antenna is reduced to 8.6dB, the radiation directivity of the first antenna is weakened, and the coverage of the first antenna is more uniform; at the same time, the upper hemisphere proportion of the first antenna can be increased to 50.6%, and the GPS efficiency, upper hemisphere proportion and directivity of the first antenna when supporting GPS signals are all better.

[0051] Please combine Figure 1 And refer to Fig.14 , Fig.14This is a third structural diagram of the antenna device 100 provided in an embodiment of the present application. The filter circuit 150 may include at least one capacitor element and at least one inductor element.

[0052] One end of at least one capacitor element and one end of at least one inductor element of the filter circuit 150 are electrically connected between the first feed source 130 and the first feeding point 112, and the other end of at least one capacitor element and the other end of at least one inductor element are electrically connected to the ground system 170 to achieve grounding. At least one capacitor element and at least one inductor element can be connected in parallel with each other between the first feed source 130 and the first feeding point 112.

[0053] It is understandable that if Fig.14 As shown, the filter circuit 150 may include a capacitor element C0 and an inductor element L0, one end of the capacitor element C0 and one end of the inductor element L0 are electrically connected between the first feed source 130 and the first feed point 112, the other end of the capacitor element C0 and the other end of the inductor element L0 are grounded, and the capacitor element C0 and the inductor element L0 can be connected in parallel to form an LC oscillation circuit. The filter circuit 150 can return the second resonant current to the ground and block the second resonant current from flowing to the first feed source 130. At the same time, the filter circuit 150 may not affect the flow of the first resonant current, and the first resonant current can pass through the filter circuit 150 and flow to the first radiator 110.

[0054] It is understandable that the filter circuit 150 may also include other structures, such as more capacitor elements C0 and inductor elements L0 connected in parallel. The embodiment of the present application does not limit the specific structure of the filter circuit 150.

[0055] Please refer again to Fig.14 , the capacitive load circuit 160 may include a first capacitor C1, one end of the first capacitor C1 is electrically connected to one end of at least one capacitive element C0 and one end of at least one inductive element L0, the other end of the first capacitor C1 is electrically connected to the first feeding point 112, and the first capacitor C1 may be electrically connected between the first feed source 130 and the first feeding point 112. Wherein, the capacitance value of the first capacitor C1 is not greater than 3 pF (pf), the first capacitor C1 may be a small capacitive element, the first capacitor C1 and the filter circuit 150 may jointly block the GPS signal, and the first resonant current is not easily electromagnetically coupled to the second radiator 120 under the action of the first capacitor C1, thereby improving the antenna efficiency of the first antenna. Moreover, when the second antenna supports medium and high frequency wireless signals, the first capacitor C1 is equivalent to a path for the second resonant current, and the first capacitor C1 is not easy to block the second resonant current from passing through the first capacitor C1 and returning to the ground through the filter circuit 150.

[0056] It is understandable that the capacitive load circuit 160 may also be other circuit structures. For example, but not limited to, the capacitive load circuit 160 may include multiple capacitor elements C0 connected in series. The embodiment of the present application does not limit the capacitive load circuit 160.

[0057] The capacitive load circuit 160 of the embodiment of the present application includes a small capacitor element, which can not only improve the performance of the first antenna in supporting GPS signals, but also reduce the cost of the capacitive load circuit 160 .

[0058] Please combine Fig.14 Please also refer to Fig.15 , Fig.15 This is a fourth structural diagram of the antenna device 100 provided in an embodiment of the present application. The antenna device 100 may further include at least one of a first matching circuit 180 and a second matching circuit 190 .

[0059] The first matching circuit 180 is electrically connected between the first feed source 130 and the filter circuit 150 , and is used to perform impedance matching on the excitation signal provided by the first feed source 130 .

[0060] The second matching circuit 190 is electrically connected between the second feed source 140 and the second radiator 120 , and is used for performing impedance matching on the excitation signal provided by the second feed source 140 .

[0061] It is understandable that the first matching circuit 180 and the second matching circuit 190 may include, but are not limited to, an unlimited number of capacitors, inductors and other components. Fig.14 As shown, the first matching circuit 180 may include a second capacitor C2 and a first inductor L1, the first inductor L1 may be electrically connected between the first feed source 130 and the filter circuit 150, one end of the second capacitor C2 may be electrically connected between the first feed source 130 and the first inductor L1, and the other end of the second capacitor C2 may be electrically connected to the ground system 170 to achieve grounding. Of course, the first matching circuit 180 may also be other structures, which is not limited in the embodiment of the present application. The structure of the second matching circuit 190 may be the same as or different from the structure of the first matching circuit 180, and the embodiment of the present application does not limit the specific structure of the second matching circuit 190.

[0062] It is understandable that the antenna device 100 may include a first matching circuit 180 , may include a second matching circuit 190 , or may include both the first matching circuit 180 and the second matching circuit 190 , which is not limited in the embodiment of the present application.

[0063] The antenna device 100 of the embodiment of the present application is provided with a first matching circuit 180 and a second matching circuit 190, which can improve the antenna performance of the first antenna and the second antenna. Under the action of the filter circuit 150 and the capacitive load circuit 160, the isolation between the first radiator 110 and the second radiator 120 of the mouth-to-mouth radiation structure can be improved, and the upper hemisphere proportion of the GPS signal supported by the first antenna can be increased, and the directivity of the first antenna can be improved, so that the radiation of the first antenna is more rapid and uniform, and the coverage area is wider, and the first antenna has a better signal receiving and sending capability.

[0064] Based on the structure of the antenna device 100, the embodiment of the present application further provides an electronic device 10, which may be a smart phone, a tablet computer, or a gaming device, an augmented reality (AR) device, an automotive device, a data storage device, an audio player, a video player, a laptop, a desktop computing device, etc. Please refer to Fig.16 , Fig.16 The first structural diagram of the electronic device 10 provided in the embodiment of the present application. The electronic device 10 includes the antenna device 100 of any of the above embodiments. Fig.16 As shown, the antenna device 100 may further include a display screen 200 , a middle frame 300 , a circuit board 400 , a battery 500 , and a rear cover 600 .

[0065] The display screen 200 is disposed on the middle frame 300 to form a display surface of the antenna device 100 for displaying information such as images and texts. The display screen 200 may include a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display.

[0066] The middle frame 300 may include a frame 310 and a middle plate 320. The frame 310 may be a hollow frame structure and form the outer frame of the antenna device 100. The middle plate 320 may be a thin plate or sheet-like structure. The middle frame 300 is used to provide support for the electronic devices or functional components in the antenna device 100 so as to install the electronic devices and functional components of the antenna device 100 together. For example, grooves, protrusions, through holes and other structures may be provided on the middle frame 300 to facilitate the installation of the electronic devices or functional components of the antenna device 100. It can be understood that the material of the middle frame 300 may include metal or plastic.

[0067] The circuit board 400 is arranged on the middle frame 300 for fixing, and the circuit board 400 is sealed inside the antenna device 100 through the rear shell 600. A processor may be integrated on the circuit board 400, and one or more functional components such as an earphone interface, an acceleration sensor, a gyroscope, and a motor may also be integrated. At the same time, the display screen 200 may be electrically connected to the circuit board 400 so that the display of the display screen 200 is controlled by the processor on the circuit board 400.

[0068] The battery 500 is disposed on the middle frame 300, and the battery 500 is sealed inside the antenna device 100 through the rear shell 600. At the same time, the battery 500 is electrically connected to the circuit board 400 so that the battery 500 can power the antenna device 100. Among them, a power management circuit may be disposed on the circuit board 400. The power management circuit is used to distribute the voltage provided by the battery 500 to various electronic devices in the antenna device 100.

[0069] The rear shell 600 is connected to the middle frame 300. For example, the rear shell 600 can be attached to the middle frame 300 by an adhesive such as a double-sided tape to achieve connection with the middle frame 300. The rear shell 600 is used to seal the electronic devices and functional components of the antenna device 100 inside the antenna device 100 together with the middle frame 300 and the display screen 200 to protect the electronic devices and functional components of the antenna device 100.

[0070] It is understandable that the first radiator 110 and the second radiator 120 of the embodiment of the present application can be formed on the frame 310 to form a frame antenna structure. Fig.17 , Fig.17 A second structural schematic diagram of the electronic device 10 provided in an embodiment of the present application. The first metal branch 101 and the second metal branch 102 may be formed on the frame 310 by slits, the first radiator 110 may include the first metal branch 101, and the second radiator 120 may include the second metal branch 102. In this case, the first radiator 110 and the second radiator 120 may reuse the conductor structure on the frame 310, and the frame 310 is reused, which can further realize the miniaturization design of the antenna device 100.

[0071] It should be noted that the first radiator 110 and the second radiator 120 of the embodiment of the present application can also be formed or set on other structures of the electronic device 10. For example, the two radiators can be set on structures such as the circuit board 400 and the antenna bracket. The embodiment of the present application is not limited to this.

[0072] It is understandable that the ground system 170 of the embodiment of the present application can be formed on the rear housing 600, the circuit board 400 or the middle plate 320 of the middle frame 300, and a conductor area with zero potential can be provided on the rear housing 600, the circuit board 400 or the middle plate 320, and the ground system 170 can be provided on the conductor area. Fig.17 As shown, the middle plate 320 may be provided with a ground system 170, and the middle plate 320 may be reused as the ground system 170. At this time, the first ground terminal 113 of the first radiator 110, the second ground terminal 123 of the second radiator 120, and the filter circuit 150 may be grounded by being electrically connected to the ground system 170 through structures such as, but not limited to, grounding springs, grounding pins, and grounding pads.

[0073] It can be understood that one or more of the first feed source 130, the second feed source 140, the filter circuit 150, the capacitive load circuit 160, the first matching circuit 180, and the second matching circuit 190 of the embodiment of the present application can be, but is not limited to, arranged on the circuit board 400; of course, one or more of the above components can also be arranged on the small board of the electronic device 10, and the embodiment of the present application does not limit the specific setting position of the above structure.

[0074] Please refer again to Fig.17 The frame 310 includes a first frame 311, a second frame 312, a third frame 313 and a fourth frame 314 connected in sequence. The first frame 311 is arranged opposite to the third frame 313, and the second frame 312 is arranged opposite to the fourth frame 314. The length of the second frame 312 or the fourth frame 314 is greater than the length of the first frame 311 or the third frame 313, so that the second frame 312 and the fourth frame 314 are long frames of the electronic device 10, and the first frame 311 and the third frame 313 are short frames of the electronic device 10. When the electronic device 10 is in a vertical posture, the distance between the first frame 311 and the ground is greater than the distance between the third frame 313 and the ground. The first frame 311 can be the top frame of the electronic device 10, and the third frame 313 can be the bottom frame of the electronic device 10. The first metal branch 101 is formed on the first frame 311, a part of the second metal branch 102 is formed on the first frame 311, and another part of the second metal branch 102 is formed on the second frame 312. Thus, the first radiator 110 can be formed on the top frame of the electronic device 10 in a vertical posture. When supporting GPS signals, the radiation direction of the first radiator 110 can be toward the GPS satellites in the sky, and the GPS performance of the first radiator 110 is better.

[0075] It should be noted that the above is only an exemplary description of the first radiator 110 and the second radiator 120 being arranged on the frame 310. For example, at least one of the first radiator 110 and the second radiator 120 may also be arranged on the second frame 312 and the fourth frame 314. The embodiment of the present application does not limit the arrangement positions of the first radiator 110 and the second radiator 120. In addition, the first radiator 110 and the second radiator 120 of the present application may also be other forms of radiation structures, such as but not limited to laser direct structuring (LDS) radiators, flexible printed circuit (FPC) radiators, print direct structuring (PDS) radiators, etc. The embodiment of the present application does not limit the forms of the first radiator 110 and the second radiator 120.

[0076] It can be understood that the above is only an illustrative example of the electronic device 10. The electronic device 10 of the embodiment of the present application may also include components such as a camera, a sensor, and an acoustic-to-electric conversion device. These components can be found in the description of the relevant technology and will not be repeated here.

[0077] It should be noted that the antenna solution of the present application is not only applicable to electronic devices 10 such as mobile phones, but can also be applied to large-screen electronic devices 10 such as tablet circuits, PCs, etc., and the embodiments of the present application are not limited to this.

[0078] In the antenna device 100 and the electronic device 10 of the embodiment of the present application, the first radiator 110 and the second radiator 120 form a mouth-to-mouth antenna radiation structure, and the second resonant current generated by the second radiator 120 stimulated by the second feed source 140 can be returned to the ground through the filter circuit 150, so that the second resonant current is not easy to interfere with the first radiator 110; at the same time, the capacitive load circuit 160 is electrically connected between the filter circuit 150 and the first feeding point 112, and the capacitive load circuit 160 and the filter circuit 150 can block the first resonant current from being electromagnetically coupled to the second radiator 120. The capacitive load circuit 160 can also tune the first resonant current, so that the bandwidth of the first antenna formed by the first feed source 130 and the first radiator 110 becomes wider, the antenna efficiency is improved by 3-4dB, the radiation front-to-back ratio of the first antenna is reduced to 8.6dB, the radiation directivity of the first antenna is weakened, and the coverage of the first antenna is more uniform; at the same time, the upper hemisphere proportion of the first antenna can be increased to 50.6%, and the GPS efficiency, upper hemisphere proportion and directivity of the first antenna when supporting GPS signals are all excellent.

[0079] It should be understood that, in the description of this application, terms such as "first", "second", etc. 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.

[0080] 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, comprising a first free end, a first feeding point and a first grounding end, wherein the first grounding end is grounded, and a distance between the first feeding point and the first free end is less than or equal to one fifth of a branch length between the first free end and the first grounding end; A first feed source, electrically connected to the first feeding point, the first feed source is used to excite the first radiator to generate a first resonance mode and form a first resonance current, the first resonance mode is used to support GPS signals; A filter circuit, electrically connected between the first feed source and the first feed point; A second radiator, comprising a second free end, a second feeding point and a second grounding end, wherein a coupling gap is formed between the second free end and the first free end, and the second grounding end extends in a direction away from the first radiator and is grounded; and A second feed source is electrically connected to the second feed point, and the second feed source is used to excite the second radiator to form a second resonant current; wherein, The second resonant current is used for electromagnetic coupling to the first radiator and returning to the ground through the filter circuit.

2. The antenna device according to claim 1, characterized in that The antenna device further comprises: A capacitive load circuit is electrically connected between the filter circuit and the first feeding point, and the capacitive load circuit and the filter circuit are used together to block the first resonant current from being electromagnetically coupled to the second radiator.

3. The antenna device according to claim 2, characterized in that The capacitive load circuit includes a first capacitor, and the capacitance value of the first capacitor is not greater than 3 pF.

4. The antenna device according to any one of claims 1 to 3, characterized in that: The filtering circuit includes at least one capacitor element and at least one inductor element, one end of at least one capacitor element and one end of at least one inductor element are electrically connected between the first feed source and the first feeding point, and the other end of at least one capacitor element and the other end of at least one inductor element are both grounded.

5. The antenna device according to any one of claims 1 to 3, characterized in that: The antenna device further comprises: The first matching circuit is electrically connected between the first feed source and the filter circuit, and is used for performing impedance matching on the excitation signal provided by the first feed source.

6. The antenna device according to claim 5, characterized in that The first matching circuit includes a second capacitor and a first inductor, the first inductor is electrically connected between the first feed source and the filter circuit, one end of the second capacitor is electrically connected between the first feed source and the first inductor, and the other end of the second capacitor is grounded.

7. The antenna device according to any one of claims 1 to 3, characterized in that: The antenna device further comprises: The second matching circuit is electrically connected between the second feed source and the second radiator, and is used for performing impedance matching on the excitation signal provided by the second feed source.

8. An electronic device, characterized in that: Comprising the antenna device according to any one of claims 1 to 7.

9. The electronic device according to claim 8, characterized in that: The electronic device comprises: A frame, wherein the frame is formed by slits to form a first metal branch and a second metal branch, the first radiator includes the first metal branch, and the second radiator includes the second metal branch; and The middle plate includes a ground system, and the first grounding terminal and the second grounding terminal are electrically connected to the ground system to achieve grounding.

10. The electronic device according to claim 9, characterized in that: The frame includes a first frame, a second frame, a third frame and a fourth frame connected in sequence, the first frame is arranged opposite to the third frame, the second frame is arranged opposite to the fourth frame, and the length of the second frame or the fourth frame is greater than the length of the first frame or the third frame; wherein When the electronic device is in a vertical posture, the distance between the first frame and the ground is greater than the distance between the third frame and the ground, the first metal branch is formed on the first frame, a part of the second metal branch is formed on the first frame, and another part of the second metal branch is formed on the second frame.

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