Antenna and electronic equipment

Abstract

The invention provides an antenna and electronic equipment, and relates to the technical field of communication. The antenna comprises a first radiating body, a second radiating body, a first feed end, a second feed end and a grounding end, the first radiating body and the second radiating body are oppositely arranged in a spaced mode in the first direction, the first feed end is located at the first end of the first radiating body, and the grounding end is located at the second end of the first radiating body. The first radiator is electrically connected with the circuit board through the grounding end so as to form a differential mode current form with opposite current flow directions on the first radiator; in the first direction, the second feed end is located on the side, away from the first radiating body, of the second radiating body, so that a common-mode current mode with the same current flowing direction is formed on the second radiating body. The invention provides an antenna and an electronic device. The isolation degree between antennas can be improved while the size of the antenna is reduced.

Description

TECHNICAL FIELD

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

[0002] With the development of miniaturization of electronic devices, the internal space is also getting smaller and smaller, but the requirements of the devices for communication are getting higher and higher, therefore, how to reduce the volume of the antenna while avoiding mutual interference between the antennas due to too close distance is a technical problem that the person skilled in the art needs to solve urgently. SUMMARY

[0003] In order to solve at least one problem mentioned in the background, the present application provides an antenna and an electronic device, which can reduce the volume of the antenna while improving the isolation between the antennas.

[0004] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0005] In a first aspect, the present application provides an antenna, comprising a first radiator, a second radiator, a first feeding end, a second feeding end and a grounding end, the first radiator and the second radiator are spaced apart and oppositely arranged along a first direction, the first feeding end is located at a first end of the first radiator, the grounding end is located at a second end of the first radiator, the first radiator is electrically connected to a circuit board through the grounding end, so as to form a differential mode current form with opposite current directions on the first radiator;

[0006] In the first direction, the second feeding end is located on a side of the second radiator away from the first radiator, so as to form a common mode current form with the same current direction on the second radiator.

[0007] As an optional implementation, in the first direction, the first feeding end is located on a side of the first radiator close to the second radiator.

[0008] As an optional implementation, the first radiator comprises a first radiation section, a second radiation section and a third radiation section, the first radiation section extends along the first direction, the second radiation section extends along a second direction, the first radiation section and the third radiation section are respectively connected to two ends of the second radiation section, and the second direction is perpendicular to the first direction.

[0009] As an optional implementation, in the first direction, the second radiation section is located on a side of the first radiator away from the second radiator.

[0010] As an optional implementation, the distance between the first radiator and the second radiator along the first direction is 3mm-10mm.

[0011] As an optional implementation, the first feeding end and the second feeding end each comprise a matching element, so as to realize direct feeding or coupled feeding through the matching element.

[0012] As an optional implementation, the phase interval s between the first radiator and the second radiator and the phase length a of the first radiator satisfy the following relationship:

[0013] a-s=2βL+π

[0014] wherein β=2π / λ, L=nλ / 2, n is a positive integer, and λ is a wavelength.

[0015] In a second aspect, the present application further provides an electronic device comprising the antenna of the first aspect.

[0016] As an optional implementation, the electronic device further comprises a circuit board and a support, the support is connected to the circuit board, the first radiator and the second radiator are connected to the support, and the first radiator and the second radiator are located on the same side of the circuit board.

[0017] As an optional implementation, the electronic device further comprises a metal frame and a circuit board, the metal frame surrounds the periphery of the circuit board, the metal frame has a gap to divide the metal frame into the first radiator and the second radiator.

[0018] The antenna provided by the present application comprises a first radiator, a second radiator, a first feeding end, a second feeding end and a grounding end, the first radiator and the second radiator are spaced apart and oppositely arranged along a first direction, the first feeding end is located at a first end of the first radiator, the grounding end is located at a second end of the first radiator, the first radiator is electrically connected to the circuit board through the grounding end to form a differential mode current form with opposite current directions on the first radiator, and the second feeding end is located on a side of the second radiator away from the first radiator along the first direction to form a common mode current form with the same current direction on the second radiator. The antenna provided by the present application uses the first radiator with opposite current directions (differential mode, d-mode for short) and the second radiator with the same current direction (common mode, c-mode for short) together, so that the space coupling between the first radiator and the second radiator and the floor coupling between the feeding end of the first radiator and the feeding end of the second radiator are offset to each other, thereby offsetting the signals between the first radiator and the second radiator, improving the isolation between the first radiator and the second radiator. In this way, not only the overall volume of the antenna is reduced, but also good isolation is ensured. Moreover, compared with the antenna pair using the traditional decoupling method, the antenna provided by the present application not only has better decoupling effect, but also does not need more decoupling structures, further reducing the overall volume of the antenna, which is extremely suitable for electronic devices with small space. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0020] Figure 1 The installation schematic diagram of the antenna provided by the embodiment of the present application in an electronic device is shown in the figure.

[0021] Figure 2 The back view schematic diagram of the electronic device provided by the embodiment of the present application is shown in the figure. Figure 1

[0022] Figure 3 The overall structure schematic diagram of the first radiator and the second radiator in the antenna provided by the embodiment of the present application is shown in the figure.

[0023] Figure 4 The first isolation degree change schematic diagram of the first radiator and the second radiator in the antenna provided by the embodiment of the present application is shown in the figure.

[0024] Figure 5 The second isolation degree change schematic diagram of the first radiator and the second radiator in the antenna provided by the embodiment of the present application is shown in the figure.

[0025] Figure 6 The first structure schematic diagram of the electronic device provided by the embodiment of the present application is shown in the figure.

[0026] Figure 7 The second structure schematic diagram of the electronic device provided by the embodiment of the present application is shown in the figure.

[0027] Explanation of reference signs:

[0028] 100-antenna;

[0029] 110-first radiator;

[0030] 111-first radiation section;

[0031] 112-second radiation section;

[0032] 113-third radiation section;

[0033] 114-ground terminal;

[0034] 120-second radiator;

[0035] 130-first feeding terminal;

[0036] 140-second feeding terminal;

[0037] ​150 - circuit board

[0038] 160 - support

[0039] 170 - frame

[0040] 200 - electronic device

[0041] X - first direction

[0042] Y - second direction DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] In the application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0045] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific situation.

[0046] In addition, the terms "mount", "set", "provided with", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific situation.

[0047] In addition, the terms "first", "second", and the like are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "multiple" is two or more.

[0048] With the development of miniaturization of electronic devices, the internal space is also getting smaller and smaller, but the requirement of the device for communication is also getting higher and higher, therefore, how to reduce the volume of the antenna and avoid the mutual interference between the antennas due to too close distance is a technical problem which the person skilled in the art needs to solve urgently.

[0049] Therefore, the present application provides an antenna 100, comprising a first radiator 110, a second radiator 120, a first feeding end 130, a second feeding end 140 and a grounding end 114, the first radiator 110 and the second radiator 120 are spaced apart and oppositely arranged along a first direction X, the first feeding end 130 is located at a first end of the first radiator 110, the grounding end 114 is located at a second end of the first radiator 110, the first radiator 110 is electrically connected to a circuit board 150 through the grounding end 114 to form a differential mode current form with opposite current directions on the first radiator 110; along the first direction X, the second feeding end 140 is located on a side of the second radiator 120 away from the first radiator 110 to form a common mode current form with the same current direction on the second radiator 120. The antenna 100 provided by the present application uses the first radiator 110 with opposite current directions (differential mode, abbreviated as d-mode) and the second radiator 120 with the same current direction (common mode, abbreviated as c-mode) together, so that the space coupling between the first radiator 110 and the second radiator 120 and the floor coupling between the feeding end of the first radiator 110 and the feeding end of the second radiator 120 are offset to each other, thereby the signals between the first radiator 110 and the second radiator 120 are offset to each other, the isolation between the first radiator 110 and the second radiator 120 is improved, thus, not only the overall volume of the antenna 100 is reduced, but also the good isolation is ensured, and compared with the antenna 100 using the traditional decoupling mode, the decoupling effect of the antenna 100 provided by the present application is not only better, but also more decoupling structures are not needed, further reducing the overall volume of the wire, which is extremely suitable for electronic devices 200 with small space.

[0050] Figure 1 The installation schematic diagram of the antenna 100 provided by the embodiment of the present application in the electronic device 200 is shown in the figure; Figure 2 The back view schematic diagram of the electronic device 200 is shown in the figure; Figure 1 The back view schematic diagram of the electronic device 200 is shown in the figure; Figure 3 The overall structure schematic diagram of the first radiator 110 and the second radiator 120 in the antenna 100 provided by the embodiment of the present application is shown in the figure; Figure 4 The first kind of isolation change schematic diagram of the first radiator 110 and the second radiator 120 in the antenna 100 provided by the embodiment of the present application is shown in the figure; Figure 5A second isolation degree variation diagram of the first radiator 110 and the second radiator 120 in the antenna 100 provided by the embodiment of the present application is shown in FIG. 2B. Figure 6 A first structure diagram of the electronic device 200 provided by the embodiment of the present application is shown in FIG. 3A. Figure 7 A second structure diagram of the electronic device 200 provided by the embodiment of the present application is shown in FIG. 3B.

[0051] Reference can be made to Figures 1 to 7 The embodiment of the present application provides an antenna 100, which comprises a first radiator 110, a second radiator 120, a first feeding end 130, a second feeding end 140 and a grounding end 114. The first radiator 110 and the second radiator 120 are spaced apart and oppositely arranged along a first direction X. The first feeding end 130 is located at a first end of the first radiator 110, and the grounding end 114 is located at a second end of the first radiator 110. The first radiator 110 is electrically connected to a circuit board 150 through the grounding end 114, so as to form a differential mode current with opposite current directions on the first radiator 110. Along the first direction X, the second feeding end 140 is located on a side of the second radiator 120 away from the first radiator 110, so as to form a common mode current with the same current direction on the second radiator 120.

[0052] Wherein, the current with equal amplitude and in phase generated when the antenna 100 is fed alone is called common mode (C mode for short); and the current with equal amplitude and in opposite phase generated when the antenna 100 is fed alone is called differential mode (D mode for short). It can be understood that when the distance between the two antennas 100 is close, the coupling effect of the coupling capacitance formed between the two antennas 100 will increase with the decrease of the distance between them, so as to cause the mutual interference of the signals between the two antennas 100 to be enhanced, and the isolation degree to be reduced.

[0053] In order to solve the above problems, the antenna 100 provided by the embodiment of the present application excites the signals of the C mode port and the signals of the D mode port through two feed sources respectively, so that the signals of the C mode port are canceled at the D mode port, and the signals of the D mode port are canceled at the C mode port, thereby realizing the mutual isolation of the signals between the two ports, reducing the overall size of the antenna 100, and enabling the electronic device 200 to set more antennas 100 in a limited space.

[0054] It can be understood that the first radiator 110 and the second radiator 120 respectively form a receiving antenna 100 and a transmitting antenna 100. The mixed use of C-mode and D-mode antennas 100, along with the optimized antenna structure design, results in lower current coupling of the antenna pair on the ground plane compared to traditional designs, improving the efficiency and stability of the antenna pair and reducing energy loss. The principle behind this effect is that the mixed use of C-mode and D-mode antennas 100 allows for more concentrated current in the antennas 100, reducing diffusion on the ground plane, thereby lowering current coupling on the ground plane and improving the efficiency and stability of the antenna pair.

[0055] The antenna 100 provided by this invention uses a first radiator 110 with opposite current flow direction (differential mode, or d-mode) and a second radiator 120 with the same current flow direction (common mode, or c-mode). This allows the spatial coupling between the first radiator 110 and the second radiator 120, as well as the ground coupling between the feed terminals of the first radiator 110 and the second radiator 120, to cancel each other out. This improves the isolation between the first radiator 110 and the second radiator 120. As a result, the overall size of the antenna 100 is reduced, and good isolation is ensured. Furthermore, compared with antennas 100 using traditional decoupling methods, the antenna 100 provided by this invention has a better decoupling effect and does not require more decoupling structures, further reducing the overall size of the wires. It is extremely suitable for use in small-space electronic devices 200.

[0056] In the above embodiment, along the first direction X, the first feed point 130 can be located on the side of the first radiator 110 closer to the second radiator 120. Positioning the feed point at one end of the radiator increases the effective length of the radiator and improves radiation efficiency. Simultaneously, this structure also makes it easier to match the antenna 100, thereby increasing bandwidth.

[0057] like Figures 1-3 As shown in the above embodiment, the first radiator 110 may specifically include a first radiating segment 111, a second radiating segment 112, and a third radiating segment 113. The first radiating segment 111 extends along a first direction X, and the second radiating segment 112 extends along a second direction Y. The first radiating segment 111 and the third radiating segment 113 are respectively connected to the two ends of the second radiating segment 112. The second direction Y is perpendicular to the first direction X. In this way, the current distribution of the antenna 100 can be changed, enabling the antenna 100 to generate effective radiation in different frequency bands, thereby achieving multi-frequency coverage, meeting the requirements of the 4G antenna 100, improving the applicability and flexibility of the antenna pair, and enabling the antenna pair to adapt to different communication frequency bands.

[0058] In the above embodiments, along the first direction X, the second radiating segment 112 may be located on the side of the first radiator 110 away from the second radiator 120.

[0059] In the above embodiments, the distance between the first radiator 110 and the second radiator 120 along the first direction X can be 3mm-10mm. This can keep the overall volume of the antenna 100 to a minimum while ensuring that the antenna 100 has a high degree of isolation. If the distance between the first radiator 110 and the second radiator 120 is too small, the signal interference effect between them will be significantly enhanced. If the distance between the first radiator 110 and the second radiator 120 is too large, it will increase the volume of the antenna 100.

[0060] In the above embodiments, both the first feed terminal 130 and the second feed terminal 140 may include a matching element to perform direct feeding or coupled feeding. A certain gap may be maintained between the matching element and the first radiator 110 or the second radiator 120 for coupled feeding. Coupled feeding can improve the transmission efficiency and bandwidth of the antenna 100. Specifically, during coupled feeding, the matching element may be a capacitor or an inductor.

[0061] In the above embodiments, the phase spacing s between the first radiator and the second radiator and the phase length a of the first radiator satisfy the following relationship:

[0062] as=2βL+π

[0063] Where β = 2π / λ, L = nλ / 2, n is a positive integer, and λ is the wavelength. This facilitates signal cancellation between the first radiator 110 and the second radiator 120, and also improves the overall efficiency and bandwidth of the antenna 100.

[0064] like Figure 4 and Figure 5 As shown, the antenna 100 provided by this invention achieves a minimum low-frequency isolation of -13dB by constructing decoupling recesses between antennas 100 at the same frequency and combining this with a specific antenna 100 structural design. This significantly optimizes the performance of the antenna pair and reduces interference between antennas 100. The principle behind this effect is that the design of the decoupling recesses can change the electromagnetic field distribution between antennas 100, weakening the coupling effect between antennas 100 and thus improving the isolation of the antenna pair.

[0065] Further, the embodiment of the present application also provides an electronic device 200 comprising the antenna 100 in the above embodiment, the antenna 100 comprises a first radiator 110, a second radiator 120, a first feeding end 130, a second feeding end 140 and a grounding end 114, the first radiator 110 and the second radiator 120 are spaced apart and oppositely arranged along a first direction X, the first feeding end 130 is located at a first end of the first radiator 110, the grounding end 114 is located at a second end of the first radiator 110, the first radiator 110 is electrically connected with the circuit board 150 through the grounding end 114, so as to form a differential mode current form with opposite current directions on the first radiator 110; along the first direction X, the second feeding end 140 is located on a side of the second radiator 120 away from the first radiator 110, so as to form a common mode current form with the same current direction on the second radiator 120. The antenna 100 uses the first radiator 110 with opposite current directions (differential mode, d-mode for short) and the second radiator 120 with the same current direction (common mode, c-mode for short) mixedly, so that the signals between the first radiator 110 and the second radiator 120 can be offset to each other, thereby improving the isolation between the first radiator 110 and the second radiator 120, reducing the overall size of the antenna 100, ensuring good isolation, thereby improving the communication effect of the electronic device 200, and compared with the antenna 100 using the traditional decoupling mode, the antenna 100 provided by the embodiment of the present application has better decoupling effect and does not need more decoupling structures, further reducing the overall size of the antenna, which is extremely suitable for the electronic device 200 with small space.

[0066] As shown in Figure 6 , the electronic device 200 can include but is not limited to a mobile phone, a tablet computer and the like, specifically, the electronic device 200 can further comprise a circuit board 150 and a support 160, the support 160 is connected to the circuit board 150, the first radiator 110 and the second radiator 120 are connected to the support 160, and the first radiator 110 and the second radiator 120 are located on the same side of the circuit board 150, thereby saving space on the mainboard and leaving sufficient space for the arrangement of other functional elements, improving the comprehensive performance and cost performance of the electronic device 200.

[0067] As shown in Figure 7 , in the above embodiment, the electronic device 200 can further comprise a metal frame 170 and a circuit board 150, the metal frame 170 surrounds the periphery of the circuit board 150, the metal frame 170 has a gap to divide the metal frame 170 into the first radiator 110 and the second radiator 120, specifically, for example, applied to a mobile phone with a slit metal frame 170, the width of the gap can be reduced, the strength of the mobile phone frame 170 can be improved, and the size of the mobile phone frame 170 can be reduced.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An antenna, characterized in that, It includes a first radiator, a second radiator, a first feed terminal, a second feed terminal, and a ground terminal. The first radiator and the second radiator are spaced apart and arranged opposite to each other along a first direction. The first feed terminal is located at the first end of the first radiator, and the ground terminal is located at the second end of the first radiator. The first radiator is electrically connected to the circuit board through the ground terminal to form a differential mode current with opposite current flow on the first radiator. Along the first direction, the second feed terminal is located on the side of the second radiator away from the first radiator, so as to form a common-mode current with the same current flow direction on the second radiator.

2. The antenna according to claim 1, characterized in that, Along the first direction, the first feed terminal is located on the side of the first radiator closer to the second radiator.

3. The antenna according to claim 2, characterized in that, The first radiator includes a first radiating segment, a second radiating segment, and a third radiating segment. The first radiating segment extends along a first direction, and the second radiating segment extends along a second direction. The first radiating segment and the third radiating segment are respectively connected to the two ends of the second radiating segment. The second direction is perpendicular to the first direction.

4. The antenna according to claim 3, characterized in that, Along the first direction shown, the second radiating segment is located on the side of the first radiator away from the second radiator.

5. The antenna according to claim 4, characterized in that, The distance between the first radiator and the second radiator along the first direction is 3mm-10mm.

6. The antenna according to claim 5, characterized in that, Both the first and second power supply terminals include matching elements for direct or coupled power supply via the matching elements.

7. The antenna according to claim 6, characterized in that, The phase spacing s between the first radiator and the second radiator and the phase length a of the first radiator satisfy the following relationship: as=2βL+π Where β = 2π / λ, L = nλ / 2, n is a positive integer, and λ is the wavelength.

8. An electronic device, characterized in that, Includes the antenna described in any one of claims 1-7.

9. The electronic device according to claim 8, characterized in that, It also includes a circuit board and a bracket, the bracket being connected to the circuit board, the first radiator and the second radiator being connected to the bracket, and the first radiator and the second radiator being located on the same side of the circuit board.

10. The electronic device according to claim 8, characterized in that, It also includes a metal frame and a circuit board, the metal frame surrounding the periphery of the circuit board, the metal frame having a gap to divide the metal frame into the first radiator and the second radiator.

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