An antenna device and electronic equipment

Abstract

This application discloses an antenna device and an electronic device. The antenna device includes: a metal stub and a parasitic stub, with a gap between the metal stub and the parasitic stub; a feed point is provided on the metal stub; the metal stub forms a first radiating segment, and the parasitic stub forms a second radiating segment; on the metal stub, the stub between the feed point and the suspended end of the metal stub forms a third radiating segment; a feed source and a matching circuit, the matching circuit being electrically connected to the feed point and the feed source; the matching circuit is used to double-couple a first frequency band excitation signal provided by the feed source to the first radiating segment, causing the first radiating segment to generate a first frequency band resonance, double-couple a second frequency band excitation signal provided by the feed source to the second radiating segment, causing the second radiating segment to generate a second frequency band resonance, and double-couple a third frequency band excitation signal and a fourth frequency band excitation signal provided by the feed source to the third radiating segment, causing the third radiating segment to generate a third frequency band and a fourth frequency band resonance.

Description

Technical Field

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

[0002] With the continuous development of communication technology, more and more functions and technologies are being integrated into electronic devices such as mobile phones and tablets.

[0003] Currently, various manufacturers are launching their own 5G products one after another. The coexistence of 5G antennas with 4G antennas, GPS, and Wi-Fi antennas inevitably leads to insufficient antenna clearance. This is especially true in full-screen mobile terminals with non-metallic plastic back covers, where dual front cameras and quad rear cameras severely squeeze the antenna space, resulting in extremely small antenna clearance. Traditional antenna solutions mostly rely on adding multiple antenna components to meet the coverage of multiple frequency bands, which is relatively complex and can only achieve dual connectivity of two frequency bands, resulting in a high space occupancy rate for electronic devices. Summary of the Invention

[0004] This application provides an antenna device electronic device and an antenna resonance method. By using a matching circuit with dual-coupled feeding, an antenna can resonate in four frequency bands, simplifying the antenna structure and improving the space utilization of the electronic device.

[0005] The technical solution of this application embodiment is implemented as follows:

[0006] This application provides an antenna device, including:

[0007] Metal branches and parasitic branches, with a gap between the metal branches and the parasitic branches; a feed point is provided on the metal branches; the metal branches form a first radiating segment, and the parasitic branches form a second radiating segment; on the metal branches, the branch between the feed point and the suspended end of the metal branches forms a third radiating segment;

[0008] A feed source and a matching circuit, wherein the matching circuit is electrically connected to the feed point and the feed source;

[0009] The matching circuit is used to dual-couple the first frequency band excitation signal provided by the feed source to the first radiation segment, so that the first radiation segment generates resonance in the first frequency band; to dual-couple the second frequency band excitation signal provided by the feed source to the second radiation segment, so that the second radiation segment generates resonance in the second frequency band; and to dual-couple the third frequency band excitation signal and the fourth frequency band excitation signal provided by the feed source to the third radiation segment, so that the third radiation segment generates resonance in the third frequency band and the fourth frequency band, respectively.

[0010] The antenna device described above also includes:

[0011] A combiner, which is electrically connected to the feed source;

[0012] The combiner is used to transmit the acquired first frequency band excitation signal, second frequency band excitation signal, third frequency band excitation signal, and fourth frequency band excitation signal to the feed source.

[0013] In the above-mentioned antenna device, the matching circuit includes a first capacitor, a second capacitor, a third capacitor, and an inductor;

[0014] The first terminal of the first capacitor is connected to the feed point, and the second terminal of the first capacitor is connected to the first terminal of the second capacitor; the second terminal of the second capacitor is connected to the feed source.

[0015] The first terminal of the third capacitor is connected to the second terminal of the first capacitor, and the second terminal of the third capacitor is grounded; the first terminal of the inductor is connected to the second terminal of the third capacitor, and the second terminal of the inductor is connected to the first terminal of the second capacitor.

[0016] The antenna device described above also includes: a tuning switch;

[0017] One end of the tuning switch is electrically connected to a preset connection point on the parasitic branch, and the other end is grounded.

[0018] The antenna device described above also includes: a tuning switch and a tuning circuit;

[0019] One end of the tuning switch is electrically connected to a preset connection point on the parasitic branch, and the other end is connected to the tuning circuit.

[0020] In the above-mentioned antenna device, when the tuning switch is closed, the branch between the preset connection point and the suspended end of the parasitic branch forms a fourth radiating segment.

[0021] The matching circuit is also used to dual-couple the second frequency band excitation signal provided by the feed source to the fourth radiation segment, so that the second radiation segment generates resonance in the fifth frequency band.

[0022] This application provides an electronic device, which includes the antenna device described above.

[0023] The aforementioned electronic devices include:

[0024] A metal frame with a slit, forming two suspended ends on the metal frame;

[0025] On the metal frame, a metal branch is formed between a grounding point and a suspended end, and a parasitic branch is formed between another grounding point and another suspended end.

[0026] The aforementioned electronic devices also include: motherboards,

[0027] The motherboard is disposed within the metal frame, and the metal frame surrounds the motherboard.

[0028] In the aforementioned electronic device, the antenna device includes a matching circuit, a feed source, and a combiner, which are deployed on the motherboard.

[0029] This application provides an antenna device and an electronic device. The antenna device includes: a metal stub and a parasitic stub, with a gap between the metal stub and the parasitic stub; a feed point is provided on the metal stub; the metal stub forms a first radiating segment, and the parasitic stub forms a second radiating segment; a stub on the metal stub between the feed point and the suspended end of the metal stub forms a third radiating segment; a feed source and a matching circuit, the matching circuit being electrically connected to the feed point and the feed source; the matching circuit is used to double-couple a first frequency band excitation signal provided by the feed source to the first radiating segment, causing the first radiating segment to resonate in the first frequency band; to double-couple a second frequency band excitation signal provided by the feed source to the second radiating segment, causing the second radiating segment to resonate in the second frequency band; and to double-couple a third frequency band excitation signal and a fourth frequency band excitation signal provided by the feed source to the third radiating segment, causing the third radiating segment to resonate in the third and fourth frequency bands respectively. The antenna device provided in this application, through double-coupled feeding by the matching circuit, can achieve resonance of an antenna in four frequency bands, simplifying the antenna structure and improving the space utilization of the electronic device. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an antenna device provided in an embodiment of this application;

[0031] Figure 2 This is an exemplary schematic diagram illustrating the relationship between return loss and frequency, provided for an embodiment of this application.

[0032] Figure 3 This is a schematic diagram illustrating an exemplary antenna efficiency provided for an embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely for explaining the relevant application and not for limiting the application. Furthermore, it should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this application are used to distinguish different objects, rather than to describe a specific order.

[0035] This application provides an antenna device. Figure 1 A schematic diagram of the structure of an antenna device provided in this application embodiment. Figure 1 .like Figure 1 As shown, the antenna device 1 includes:

[0036] Metal branch 10 and parasitic branch 11, with a gap between the metal branch 10 and the parasitic branch 11; a feed point is provided on the metal branch 10; the metal branch forms a first radiating segment 101, and the parasitic branch forms a second radiating segment 111; on the metal branch 10, the branch between the feed point and the suspended end of the metal branch forms a third radiating segment 102;

[0037] Feed 12 and matching circuit 13, the matching circuit 13 being electrically connected to the feed point and feed 12;

[0038] Matching circuit 13 is used to dual-couple the first frequency band excitation signal provided by feed source 12 to the first radiation section 101, so that the first radiation section 101 generates resonance in the first frequency band; dual-couple the second frequency band excitation signal provided by feed source 12 to the second radiation section 111, so that the second radiation section 111 generates resonance in the second frequency band; and dual-couple the third frequency band excitation signal and the fourth frequency band excitation signal provided by feed source 12 to the third radiation section 102, so that the third radiation section 102 generates resonance in the third frequency band and the fourth frequency band, respectively.

[0039] It should be noted that, in the embodiments of this application, the metal stub 10 and the parasitic stub 11 are radiators of the antenna device 1, and the metal stub 10 and the parasitic stub 11 respectively form the first radiating segment 101 and the second radiating segment 111.

[0040] It should be noted that, in the embodiments of this application, a gap is provided between the metal branch 10 and the parasitic branch 11 to form two suspended ends. Furthermore, the other end of the metal branch 10 and the parasitic branch 11, which is different from the suspended end, is grounded. That is, the metal branch 10 and the parasitic branch 11 each have a suspended end and a grounding point. A power supply point is provided on the metal branch 10, and the branch between the power supply point and the suspended end of the metal branch 10 forms a third radiating segment 102.

[0041] It should be noted that in the embodiments of this application, the feed source 12 can be a device such as an RF chip that provides an excitation signal. The feed source 12 can be determined according to actual needs, and this embodiment of the application does not limit it.

[0042] It should be noted that, in the embodiments of this application, the feed source 12 can provide a first frequency band excitation signal, a second frequency band excitation signal, a third frequency band excitation signal, and a fourth frequency band excitation signal.

[0043] It should be noted that, in the embodiments of this application, the matching circuit 13 can dual-couple the first frequency band excitation signal provided by the feed source 12 to the first radiating section, causing the first radiating section 101 to resonate in the first frequency band; it can dual-couple the second frequency band excitation signal provided by the feed source 12 to the second radiating section 111, causing the second radiating section 111 to resonate in the second frequency band; and it can dual-couple the third and fourth frequency band excitation signals provided by the feed source 12 to the third radiating section 102, causing the third radiating section 102 to resonate in the third and fourth frequency bands, respectively. In other words, the antenna device 1 can actually achieve resonance in the first, second, third, and fourth frequency bands, i.e., resonance in all four frequency bands.

[0044] It should be noted that in the embodiments of this application, the first frequency band can be a low frequency band (LB), the second frequency band can be Wi-Fi 2.4G, the third frequency band can be GPS L5, and the fourth frequency band can be N78.

[0045] It should be noted that, in the embodiments of this application, as... Figure 1 As shown, the antenna device 1 further includes: a combiner 14, which is electrically connected to the feed 12; the combiner 14 is used to transmit the acquired first frequency band excitation signal, second frequency band excitation signal, third frequency band excitation signal and fourth frequency band excitation signal to the feed 12.

[0046] It should be noted that in the embodiments of this application, the combiner 14 is a four-band combiner, which is a four-input, one-output device. The combiner 14 can transmit the acquired first frequency band excitation signal, second frequency band excitation signal, third frequency band excitation signal, and fourth frequency band excitation signal to the feed source 12.

[0047] It should be noted that, in the embodiments of this application, as... Figure 1 As shown, the matching circuit 13 includes a first capacitor 131, a second capacitor 132, a third capacitor 133, and an inductor 134; the first terminal of the first capacitor 131 is connected to the feed point, and the second terminal of the first capacitor 131 is connected to the first terminal of the second capacitor 132; the second terminal of the second capacitor 132 is connected to the feed source; the first terminal of the third capacitor 133 is connected to the second terminal of the first capacitor 131, and the second terminal of the third capacitor 133 is grounded; the first terminal of the inductor 134 is connected to the second terminal of the third capacitor 133, and the second terminal of the inductor 134 is connected to the first terminal of the second capacitor.

[0048] It should be noted that, in the embodiments of this application, the matching circuit 13 is composed of a first capacitor 131, a second capacitor 132, a third capacitor 133, and an inductor 134. The first capacitor 131 and the second capacitor 132 are connected in series, and then the third capacitor 133 and the inductor 134 are connected in parallel. Specifically, the first capacitor 131 and the second capacitor 132 in the matching circuit 13 have a greater impact on low frequencies and can excite low-frequency dual waves, that is, mainly affect the first frequency band LB and the third frequency band GPS L5. The third capacitor 133 connected in parallel mainly affects high frequencies and can adjust the frequency of high frequencies, that is, mainly affect the second frequency band WiFi 2.4G and the fourth frequency band N78.

[0049] It should be noted that, in the embodiments of this application, the specific values ​​of the first capacitor 131, the second capacitor 132, the third capacitor 133 and the inductor 134 in the matching circuit 13 can be set according to the actual situation, and this application does not limit them.

[0050] It should be noted that, in the embodiments of this application, as... Figure 1 As shown, the antenna device 1 also includes a tuning switch 15; one end of the tuning switch 15 is electrically connected to a preset connection point on the parasitic branch, and the other end is grounded.

[0051] It should be noted that, in the embodiments of this application, the antenna device 1 may also add a tuning switch 15 on the parasitic branch 11 to achieve dual-band switching.

[0052] It should be noted that in the embodiments of this application, the preset connection point is located on the parasitic branch. The location of the preset connection point can be determined according to the actual situation, and this application does not limit it.

[0053] It should be noted that, in the embodiments of this application, one end of the tuning switch 15 is connected to a preset connection point and the other end is grounded, so that when the tuning switch 15 is closed, the equivalent electrical length of the parasitic stub 11 can be adjusted.

[0054] It should be noted that, in the embodiments of this application, as... Figure 1 As shown, the antenna device 1 also includes a tuning switch 15 and a tuning circuit 16; one end of the tuning switch 15 is electrically connected to a preset connection point on the parasitic branch 11, and the other end is connected to the tuning circuit 16.

[0055] It should be noted that, in the embodiments of this application, one end of the tuning switch 15 is connected to a preset connection point, and the other end can also be connected to a tuning circuit. This tuning circuit is used to adjust the resonant frequency generated by the radiation segment formed by the parasitic stub 11. The specific tuning circuit can be set according to the actual situation, and this application does not limit it.

[0056] Specifically, in the embodiments of this application, when the tuning switch 15 is closed, the branch between the preset connection point and the suspended end of the parasitic branch 11 forms a fourth radiation segment 112; the matching circuit 13 is also used to double-couple the second frequency band excitation signal provided by the feed source 12 to the fourth radiation segment 112, so that the second radiation segment 112 generates a fifth frequency band resonance.

[0057] It should be noted that, in the embodiments of this application, when the tuning switch 15 is closed, the branch between the preset connection point on the parasitic branch 11 and the suspended end of the parasitic branch 11 can form a fourth radiation segment 112. The equivalent electrical length of the fourth radiation segment 112 is less than the equivalent electrical length of the second radiation segment 111. Thus, the second frequency band excitation signal provided by the feed source 12 can be dual-coupled and fed to the fourth radiation segment 112, causing the second radiation segment 112 to resonate in the fifth frequency band. The fifth frequency band can be Wi-Fi 2.5G. That is to say, when the tuning switch 15 is closed, the equivalent electrical length of the radiation segment formed by the parasitic branch 11 will be shortened. When the tuning switch 15 is open, the equivalent electrical length of the parasitic branch 11 is the original electrical length of the radiation segment formed by the parasitic branch 11.

[0058] It should be noted that, in the embodiments of the present invention, when the tuning switch 15 is open, the antenna device 1 can achieve resonance of the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band. When the tuning switch 15 is closed, the antenna device 1 can achieve resonance of the first frequency band, the third frequency band, the fourth frequency band, and the fifth frequency band. That is to say, the antenna device 1 can achieve resonance of all four frequency bands.

[0059] It should be noted that, in the embodiments of the present invention, the length and cross-sectional area of ​​the metal stub 10 and the parasitic stub 11 in the antenna device 1 will affect the frequency band radiated by the radiation segment formed by the metal stub 10 and the parasitic stub 11. The specific dimensions of the metal stub 10 and the parasitic stub 11 can be selected according to the actual situation, and this application does not limit them.

[0060] It should be noted that, in the embodiments of the present invention, as... Figure 1 As shown, the current distribution in the first frequency band is as follows: Figure 1 As shown by the line formed by the midpoints, the square at the beginning of the arrow represents the point of maximum current, and the end of the arrow represents the point of minimum current; the current distribution in the second frequency band is as follows. Figure 1 As shown by the dashed line at the midpoint, the starting square of the arrow represents the point of maximum current, and the end of the arrow represents the point of minimum current. Both the third and fourth frequency bands are resonances generated by the third radiation segment 111. Utilizing the coupling feed of the matching circuit 13, two frequency bands of resonance are generated within the same radiation segment. The current distribution in the third frequency band is as follows: Figure 1The dotted lines in the diagram show the current distribution. The square at the beginning of the arrow represents the point of maximum current, and the end of the arrow represents the point of minimum current. The current distribution in the fourth frequency band is shown below. Figure 1 As shown by the dashed lines, the square at the beginning of the arrow represents the point of maximum current, and the end of the arrow represents the point of minimum current. The arrows in the middle are in opposite directions, indicating that the current directions on both sides are opposite, which is the point of minimum current. The arrows in the middle start in the same direction, which is the point of maximum current.

[0061] Figure 2 This is an exemplary schematic diagram illustrating the relationship between return loss and frequency, provided as an embodiment of this application. Figure 2 As shown, the vertical axis S11 parameter represents the antenna's return loss parameter, that is, how much energy is reflected back to the source. The value of the vertical axis S11 reflects the antenna's transmission efficiency, and the value is inversely proportional to the antenna efficiency. That is, the larger the value of S11, the worse the antenna efficiency. The horizontal axis is the resonant frequency coordinate. As can be seen from the figure, antenna device 1 has high transmission efficiency in the first frequency band (see label 1 in the figure), the second frequency band (see label 3 in the figure), the third frequency band (see label 2 in the figure), and the fourth frequency band (see label 4 in the figure).

[0062] Figure 3 This is a schematic diagram illustrating an exemplary antenna efficiency provided for an embodiment of this application. For example... Figure 3 As shown, the vertical axis represents the antenna efficiency, and the horizontal axis represents the resonant frequency. Figure 3 As can be seen, the radiation efficiency of antenna device 1 is almost the same as the overall efficiency in the four frequency bands, indicating that the loss is small in these four frequency bands and can meet the design requirements of the antenna. The four frequency bands are the first frequency band (see label 1 in the figure), the second frequency band (see label 3 in the figure), the third frequency band (see label 2 in the figure), and the fourth frequency band (see label 4 in the figure).

[0063] This application discloses an antenna device, including: a metal stub and a parasitic stub, with a gap between the metal stub and the parasitic stub; a feed point is disposed on the metal stub; the metal stub forms a first radiating segment, and the parasitic stub forms a second radiating segment; a stub on the metal stub between the feed point and the suspended end of the metal stub forms a third radiating segment; a feed source and a matching circuit, the matching circuit being electrically connected to the feed point and the feed source; the matching circuit is used to double-couple a first frequency band excitation signal provided by the feed source to the first radiating segment, causing the first radiating segment to resonate in the first frequency band; to double-couple a second frequency band excitation signal provided by the feed source to the second radiating segment, causing the second radiating segment to resonate in the second frequency band; and to double-couple a third frequency band excitation signal and a fourth frequency band excitation signal provided by the feed source to the third radiating segment, causing the third radiating segment to resonate in the third and fourth frequency bands respectively. The antenna device provided in this application, through double-coupled feeding via the matching circuit, can achieve resonance of an antenna in four frequency bands, simplifying the antenna structure and improving the space utilization of electronic equipment.

[0064] This application provides an electronic device including the antenna device 1 described above. It should be noted that, in this application, the electronic device can be a mobile phone, tablet computer, laptop computer, portable playback station, or other device with communication capabilities. The specific electronic device is not limited in this application.

[0065] It should be noted that, in the embodiments of the present invention, as... Figure 1 As shown, the electronic device 2 includes an antenna device 1, and the electronic device 2 includes:

[0066] The metal frame 20 has a gap, forming two cantilevered ends on the metal frame 20;

[0067] On the metal frame 20, a metal branch 10 is formed between a grounding point and a suspended end, and a parasitic branch 11 is formed between another grounding point and another suspended end.

[0068] In the embodiments of this application, such as Figure 1 As shown, electronic device 2 also includes: motherboard 21,

[0069] The motherboard 21 is set inside the metal frame 20, and the metal frame 20 surrounds the motherboard 21.

[0070] It should be noted that, in the embodiments of this application, as... Figure 1 As shown,

[0071] The antenna device 1 includes a matching circuit 13, a feed 12, and a combiner 14, which are deployed on the main board 21.

[0072] It should be noted that, in the embodiments of this application, the electronic device 2 includes a motherboard 21, which is disposed inside the electronic device 2, and the metal frame 20 is the border of the electronic device 2, which surrounds the motherboard 21.

[0073] It is understood that in the embodiments of this application, the motherboard 21 is actually a printed circuit board. Not only can the matching circuit 13, feed source 12, and combiner 14 be deployed on the motherboard 21, but other circuits or components can also be deployed to provide different functions. The specific components deployed on the motherboard 21 can be determined according to actual needs, and this application embodiment does not impose any limitations.

[0074] This application provides an electronic device including the antenna device described above. The electronic device provided in this application, through dual-coupled feeding via a matching circuit in the antenna device, can achieve resonance of an antenna in four frequency bands, simplifying the antenna structure and improving the space utilization of the electronic device.

[0075] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An antenna device, characterized in that, include: Metal branches and parasitic branches, with a gap between the metal branches and the parasitic branches, a feeding point on the metal branches, the metal branches forming a first radiating segment, the parasitic branches forming a second radiating segment, and the branches on the metal branches between the feeding point and the suspended end of the metal branches forming a third radiating segment; A feed source and a matching circuit, wherein the matching circuit is electrically connected to the feed point and the feed source; The matching circuit is used to dual-couple the first frequency band excitation signal provided by the feed source to the first radiation segment, so that the first radiation segment generates resonance in the first frequency band; to dual-couple the second frequency band excitation signal provided by the feed source to the second radiation segment, so that the second radiation segment generates resonance in the second frequency band; and to dual-couple the third frequency band excitation signal and the fourth frequency band excitation signal provided by the feed source to the third radiation segment, so that the third radiation segment generates resonance in the third frequency band and the fourth frequency band, respectively. The antenna device further includes: a tuning switch; One end of the tuning switch is electrically connected to a preset connection point on the parasitic branch, and the other end is connected to ground; When the tuning switch is closed, on the parasitic branch, the branch between the preset connection point and the suspended end of the parasitic branch forms a fourth radiating segment; the equivalent electrical length of the fourth radiating segment is less than the equivalent electrical length of the second radiating segment. The matching circuit is also used to dual-couple the second frequency band excitation signal provided by the feed source to the fourth radiation segment, so that the second radiation segment generates resonance in the fifth frequency band.

2. The antenna device according to claim 1, characterized in that, The antenna device further includes: A combiner, which is electrically connected to the feed source; The combiner is used to transmit the acquired first frequency band excitation signal, second frequency band excitation signal, third frequency band excitation signal, and fourth frequency band excitation signal to the feed source.

3. The antenna device according to claim 1, characterized in that, The matching circuit includes a first capacitor, a second capacitor, a third capacitor, and an inductor; The first terminal of the first capacitor is connected to the feed point, the second terminal of the first capacitor is connected to the first terminal of the second capacitor, and the second terminal of the second capacitor is connected to the feed source. The first terminal of the third capacitor is connected to the second terminal of the first capacitor, the second terminal of the third capacitor is grounded, the first terminal of the inductor is connected to the second terminal of the third capacitor, and the second terminal of the inductor is connected to the first terminal of the second capacitor.

4. The antenna device according to claim 1, characterized in that, The antenna device further includes: a tuning switch and a tuning circuit; One end of the tuning switch is electrically connected to a preset connection point on the parasitic branch, and the other end is connected to the tuning circuit.

5. An electronic device, characterized in that, The electronic device includes the antenna device according to any one of claims 1-4.

6. The electronic device according to claim 5, characterized in that, The electronic device includes: A metal frame with a slit, forming two suspended ends on the metal frame; On the metal frame, a metal branch is formed between a grounding point and a suspended end, and a parasitic branch is formed between another grounding point and another suspended end.

7. The electronic device according to claim 6, characterized in that, The electronic device also includes: A motherboard, which is disposed within the metal frame, and the metal frame surrounds the motherboard.

8. The electronic device according to claim 7, characterized in that, The antenna device includes a matching circuit, a feed, and a combiner, which are deployed on the mainboard.

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