Electronic device

Abstract

The invention discloses electronic equipment, and belongs to the technical field of antennas. The electronic equipment comprises a grounding plate; the first antenna comprises a radiation branch, a feed unit and a first grounding unit, and the feed unit is electrically connected with the radiation branch; and a first parasitic radiation branch and a second grounding unit, and the second grounding unit is connected with the grounding plate. Wherein a first gap is arranged between the radiation branch and the first parasitic radiation branch, the first grounding unit is respectively connected with the radiation branch and the grounding plate, and a first distance from the feed unit to the first gap is smaller than a second distance from the first grounding unit to the first gap; the first parasitic radiation branch comprises a first branch part and a second branch part, the first branch part is a branch part between the first grounding point and the first gap, the first grounding point is a grounding point, connected with the second grounding unit, on the first parasitic radiation branch, and the length of the first branch part is smaller than that of the second branch part.

Description

Technical Field

[0001] This application belongs to the field of antenna technology, specifically relating to an electronic device. Background Technology

[0002] With the gradual development of mobile communication technology, the communication performance of mobile terminals has also been improving. As a crucial component of mobile terminals, the characteristics of the antenna directly determine the performance of the entire communication link system. However, the space available for antenna design in mobile terminals is becoming increasingly limited, leading to the problem of low passive antenna efficiency within a smaller overall device space. Summary of the Invention

[0003] The purpose of this application is to provide an electronic device that solves the problem of low passive antenna efficiency in existing electronic devices.

[0004] To achieve the above objectives, embodiments of this application provide an electronic device, including:

[0005] Flooring;

[0006] A first antenna, comprising a radiating branch, a feed element, and a first ground loop element, wherein the feed element is electrically connected to the radiating branch; and...

[0007] The first parasitic radiating branch and the second grounding unit are connected to the grounding plate.

[0008] There is a first gap between the radiating branch and the first parasitic radiating branch, the first grounding unit is connected to the radiating branch and the grounding plate respectively, and the first distance from the power supply unit to the first gap is less than the second distance from the first grounding unit to the first gap.

[0009] The first parasitic radiating branch includes a first branch section and a second branch section. The first branch section is the branch section between the first grounding point and the first gap. The first grounding point is the grounding point on the first parasitic radiating branch that is connected to the second return ground unit. The length of the first branch section is less than the length of the second branch section.

[0010] When the first antenna is operating in the first frequency band, the first parasitic radiating branch is excited to generate a current in the same direction as the radiating branch;

[0011] When the first antenna operates in the second frequency band, the first stub is excited to generate a current in the same direction as the radiating branch, and the second frequency band is higher than the first frequency band.

[0012] In some embodiments, the length of the first parasitic radiating branch is greater than the length of the radiating branch.

[0013] In some embodiments, the radiating branch and the first parasitic radiating branch are disposed on the first frame, and the second grounding point is disposed at the end of the radiating branch away from the first gap. The second grounding point is a grounding point on the radiating branch that is connected to the first grounding unit.

[0014] In some embodiments, the electronic device further includes a second parasitic radiating branch and a third grounding unit, the third grounding unit being connected to the ground plane;

[0015] The first grounding unit and the second parasitic radiating branch are disposed on the second frame, which is adjacent to the first frame; there is a second gap between the first grounding unit and the second parasitic radiating branch; the second parasitic radiating branch has a third grounding point, which is a grounding point on the second parasitic radiating branch that is connected to the third grounding unit, and the third grounding point is disposed at one end of the second parasitic radiating branch near the second gap.

[0016] When the first antenna operates in the third frequency band, the second parasitic radiating branch is excited to generate a current in the same direction as the radiating branch. The third frequency band is greater than the first frequency band and less than the second frequency band.

[0017] In some embodiments, the second parasitic radiating branch is spatially perpendicular to the radiating branch.

[0018] In some embodiments, the electronic device further includes a first tuning unit connected between the ground plane and the first parasitic radiating branch, wherein the length of the first branch is less than a third distance from the first connection point to the first gap, and the first connection point is a connection point on the first parasitic radiating branch that is connected to the first tuning unit.

[0019] In some embodiments, the electronic device further includes a second tuning unit connected between the ground plane and the second parasitic radiating branch, wherein the fourth distance from the third grounding unit to the second gap is less than the fifth distance from the second connection point to the second gap, and the second connection point is a connection point on the second parasitic radiating branch that is connected to the second tuning unit.

[0020] In some embodiments, the first antenna is an inverted-F antenna.

[0021] In some embodiments, the second grounding unit and the first parasitic radiating branch form a T-shaped structure.

[0022] In some embodiments, both the first border and the second border are metal borders.

[0023] In the electronic device of this application embodiment, the first antenna includes a radiating branch, a feed unit, and a first ground unit, the feed unit being electrically connected to the radiating branch; a first gap is provided between the radiating branch and the first parasitic radiating branch, the first ground unit being connected to the radiating branch and the ground plane respectively, the first distance from the feed unit to the first gap being less than the second distance from the first ground unit to the first gap; the first parasitic radiating branch includes a first branch portion and a second branch portion, the first branch portion being the branch portion between the first ground point and the first gap, the first ground point being the ground point on the first parasitic radiating branch connected to the second ground unit. The second ground unit is connected to the ground plane. The length of the first branch is less than the length of the second branch. In this way, by setting the first parasitic radiating branch around the first antenna, when the first antenna is operating in the first frequency band, the first parasitic radiating branch is excited to generate a current in the same direction as the radiating branch; when the first antenna is operating in the second frequency band, the first branch is excited to generate a current in the same direction as the radiating branch. The second frequency band is higher than the first frequency band. In this way, a dual-frequency parasitic effect of the first antenna can be formed, the current distribution of the antenna can be dispersed, the equivalent aperture of the antenna can be increased, and the passive efficiency of the antenna can be improved. Attached Figure Description

[0024] Figure 1 This is one of the structural schematic diagrams of the electronic device according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the current direction when the first antenna of this application is operating in the low-frequency band;

[0026] Figure 3 This is a schematic diagram of the current direction when the first antenna of this application is operating in the high-frequency band;

[0027] Figure 4 This is a second schematic diagram of the structure of the electronic device according to an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the current direction when the first antenna of this application is operating in the mid-frequency band;

[0029] Figure 6 This is the third schematic diagram of the structure of the electronic device according to an embodiment of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0031] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] The electronic device provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0033] like Figure 1 As shown, the electronic device in this embodiment includes: a ground plane 2; a first antenna, the first antenna including a radiating branch 3, a feed unit 4 and a first grounding unit 7, the feed unit 4 being electrically connected to the radiating branch 3; and a first parasitic radiating branch 5 and a second grounding unit 8, the second grounding unit 8 being connected to the ground plane 2; wherein, there is a first gap 6 between the radiating branch 3 and the first parasitic radiating branch 5, the first grounding unit 7 connecting the radiating branch 3 and the ground plane 2 respectively, that is, the radiating branch 3 is grounded through the first grounding unit 7; the first distance from the feed unit 4 to the first gap 6 is less than the second distance from the first grounding unit 7 to the first gap 6; the first parasitic radiating branch 5 includes a first branch portion 51 and a second branch portion 52, the first branch portion 51 being the branch portion between the first grounding point and the first gap 6, the first grounding point being the grounding point on the first parasitic radiating branch 5 connected to the second grounding unit 8, that is, the first parasitic radiating branch 5 is grounded through the second grounding unit 8, and the length of the first branch portion 51 is less than the length of the second branch portion 52.

[0034] The ground plane 2 can be a metal ground plane. In some embodiments, the power supply unit 4 includes a power supply terminal, one end of which is connected to the radiating branch 3, and the other end is electrically connected to the radio frequency unit of the motherboard. It should be understood that the radio frequency unit directly supplies power to the radiating branch 3 through the power supply unit 4 and grounds it using the first grounding unit 7, which allows the radiating branch 3 to generate current, thereby enabling the radiating branch 3 to radiate resonant waves outward.

[0035] Here, the first distance from the power supply unit 4 to the first gap 6 is less than the second distance from the first grounding unit 7 to the first gap 6, indicating that the power supply unit 4 is closer to the first gap 6 than the first grounding unit 7, which can better couple energy to the first parasitic radiating branch 5.

[0036] Optionally, the first antenna is an inverted-F antenna. Inverted-F antennas have a simple structure, low manufacturing cost, and can operate in multiple frequency bands by adjusting structural parameters to adapt to different frequency requirements.

[0037] Optionally, the second ground unit 8 and the first parasitic radiating branch 5 form a T-shaped structure.

[0038] When the first antenna operates in the first frequency band (i.e., the low frequency band), the first parasitic radiating branch 5 is excited to generate a current in the same direction as the radiating branch 3.

[0039] It should be noted that when the first antenna operates in the low-frequency band, the current is mainly distributed on the radiating branch 3 and the first grounding element 7, exciting the quarter-wavelength mode of the first antenna (inverted F antenna). Furthermore, since the first antenna and the first parasitic radiating branch 5 are arranged adjacent to each other, the first parasitic radiating branch 5 will have a certain degree of coupling with the first antenna. Through the coupling effect, and the capacitance effect caused by adjusting the size of the first gap 6, the current on the first parasitic radiating branch 5 has a 360-degree phase difference with the current on the radiating branch 3, resulting in a current on the first parasitic radiating branch 5 in the same direction as the first antenna (see...). Figure 2 As shown in the figure, the current distribution of the first antenna is dispersed, the equivalent aperture of the first antenna is increased, and the low-frequency passive efficiency of the first antenna is improved.

[0040] Optionally, the length of the first parasitic radiating branch 5 is greater than the length of the radiating branch 3. Specifically, the length of the first parasitic radiating branch 5 is 6mm ± 1mm ​​longer than the length of the radiating branch 3. That is, the length of the first parasitic radiating branch 5 is slightly longer than the length of the radiating branch 3, so that the resonant frequency of the first parasitic radiating branch 5 will be slightly lower than the resonant frequency of the quarter-wavelength mode of the first antenna (inverted F antenna).

[0041] When the first antenna operates in the second frequency band (i.e., the high frequency band), the first stub 51 is excited with a current in the same direction as the radiating branch 3, and the second frequency band is higher than the first frequency band. Specifically, the first stub 51 is excited with a current in the same direction as the stub portion between the first gap 6 and the feed unit 4 on the radiating branch 3.

[0042] It should be noted that when the first antenna operates in the high-frequency band, its operating mode (inverted-F antenna) is a single-stage monopole mode (this is the mode without the first parasitic radiating branch 5). After setting the first parasitic radiating branch 5, when the first antenna operates in the high-frequency band, through coupling effects and the capacitance effect between the radiating branch 3 and the first stub 51, the current on the first stub 51 has a 360-degree phase difference with the current in the stub section between the first gap 6 and the feed unit 4 on the radiating branch 3. This is equivalent to exciting a current in the same direction on the first stub 51, changing the radiation mode of the first antenna from the original single-stage mode to a half-wave mode. That is, it changes the resonant mode of the first antenna. In addition, the first stub 51 is excited with a current in the same direction as the first antenna (see...). Figure 3 As shown in the figure, the current distribution of the first antenna is dispersed, the equivalent aperture of the first antenna is increased, and the high-frequency passive efficiency of the first antenna is improved.

[0043] In this embodiment, the length of the first stub 51 is designed to be shorter than the length of the second stub 52 (i.e., the second grounding element 8 is located closer to the first antenna). On one hand, this allows the resonant frequency to be near the high frequency of the first antenna, improving the high-frequency passive efficiency of the first antenna. On the other hand, it also makes it easier for energy to couple to the second stub 52, making it easier to excite the antenna. Figure 2 The current distribution shown improves the low-frequency passive efficiency of the first antenna.

[0044] Through the coupling and capacitance effects of the first antenna, the first parasitic radiating branch 5 excites the same-direction current on the first branch 51 and the second branch 52 (when the first antenna is operating in the low-frequency band), or only excites the same-direction current on the first branch 51 (when the first antenna is operating in the high-frequency band), forming a parasitic effect on two frequencies of the first antenna. At the same time, since the length of the first branch 51 is much shorter than the length of the first branch 51 plus the second branch 52 (i.e., the first parasitic radiating branch), the two parasitic frequencies are far apart and independent of each other, and are not affected by each other.

[0045] See Figure 1 Optionally, the radiating branch 3 and the first parasitic radiating branch 5 are disposed on the first frame 1 of the electronic device, and the second grounding point is disposed at the end of the radiating branch 3 away from the first gap 6. The second grounding point is the grounding point on the radiating branch 3 that is connected to the first grounding unit 7.

[0046] Here, the radiating branch 3 and the first parasitic radiating branch 5 are set on the first frame of the electronic device. Since the frame is far away from the motherboard and other high-frequency components of the electronic device, signal attenuation can be reduced and signal reception quality can be improved. Moreover, this design does not require additional motherboard area, saving internal space of the electronic device.

[0047] In this embodiment, the second grounding point is located at the end of the radiating branch 3 away from the first gap 6 in order to optimize the impedance matching, radiation efficiency and directivity of the first antenna.

[0048] See Figure 4 In an optional embodiment, the electronic device further includes a second parasitic radiating branch 10 and a third grounding unit 11, the third grounding unit 11 being connected to the grounding plate 2; wherein, the first grounding unit 7 and the second parasitic radiating branch 10 are disposed on the second frame 9, the second frame 9 being adjacent to the first frame 1; a second gap 12 is provided between the first grounding unit 7 and the second parasitic radiating branch 10, the second parasitic radiating branch 10 having a third grounding point, the third grounding point being the grounding point on the second parasitic radiating branch 10 connected to the third grounding unit 11, that is, the second parasitic radiating branch 10 is grounded through the third grounding unit 11, and the third grounding point is disposed at one end of the second parasitic radiating branch 10 near the second gap 12.

[0049] Optionally, both the first frame 1 and the second frame 9 are metal frames. Here, this application integrates the radiating branch 3, the first parasitic radiating branch 5, and the second parasitic radiating branch 10 onto the metal frame, so that the metal, as a radiator, can improve the antenna radiation efficiency.

[0050] This embodiment is Figure 1 Based on the embodiment shown, the first grounding unit 7 of the first antenna is set on the second frame 9 which is adjacent to and connected to the first frame 1, and a new T-shaped parasitic branch, namely the second parasitic radiating branch 10, is set on the second frame 9.

[0051] based on Figure 4 In the design structure, when the first antenna operates in the third frequency band (i.e., the mid-frequency band), the second parasitic radiating branch 10 is excited to generate a current in the same direction as the radiating branch 3. The third frequency band (mid-frequency band) is greater than the first frequency band (low-frequency band) and less than the second frequency band (high-frequency band).

[0052] This embodiment introduces a new parasitic radiating branch (i.e., the second parasitic radiating branch 10). When the first antenna is operating in the mid-frequency band, the inductive effect between the first grounding unit 7 and the second parasitic radiating branch 10, as well as the coupling effect between the grounding units (i.e., the equivalent capacitance of ground coupling), makes the current on the second parasitic radiating branch 10 in phase with the current on the first antenna. Thus, the second parasitic radiating branch 10 can be excited to generate a current in the same direction as the first antenna, thereby increasing the equivalent radiation aperture of the first antenna.

[0053] Optionally, the second parasitic radiating branch 10 and the radiating branch 3 are spatially perpendicular (90°) to each other, such that the current distribution on the second parasitic radiating branch 10 and the radiating branch 3 of the first ray are also spatially distributed at 90° (see...). Figure 5As shown in the figure, this serves to adjust the radiation direction, match the current phase with the path difference, avoid the superposition effect of reverse current, and thus avoid the effect of efficiency pit caused by the reverse current generated by parasitic radiation branches. At the same time, it can improve the intermediate frequency passive efficiency of the first antenna.

[0054] It should be understood that this application is based on Figure 4 The working principle of the designed antenna structure, whether the first antenna operates in the low-frequency or high-frequency band, can be found in [reference needed]. Figure 1 As described in some embodiments, the parasitic effects of the first antenna in both low and high frequency bands can be achieved, which will not be elaborated further here. That is, Figure 4 The antenna structure shown can improve the passive efficiency of the first antenna across the entire frequency band.

[0055] In some embodiments, the electronic device further includes a first tuning unit 13, which is connected between the ground plane 2 and the first parasitic radiating branch 5. The length of the first branch 51 is less than the third distance from the first connection point to the first gap 6. The first connection point is the connection point on the first parasitic radiating branch 5 that is connected to the first tuning unit 13.

[0056] This application is based on Figure 1 In the designed antenna structure, the inherent resonant frequency of the first parasitic radiating branch 5 is determined. When fed through the first antenna, the excited current in the same direction increases the equivalent aperture of the first antenna or changes the resonant mode of the first antenna, thereby improving the passive efficiency of the first antenna. However, this antenna structure only has a significant effect on improving the frequency band near the inherent resonant frequency of the first parasitic radiating branch 5. In this embodiment, in... Figure 1 Based on the designed antenna structure, a first tuning unit 13 is introduced into the first parasitic radiating branch 5 (see [reference]). Figure 6 ), used to adjust the resonant frequency of the first parasitic radiating branch 5, thereby enabling a directional improvement in the passive efficiency of a certain frequency band of the first antenna.

[0057] In some embodiments, see Figure 6 The electronic device also includes a second tuning unit 14, which is connected between the ground plane 2 and the second parasitic radiating branch 10. The fourth distance from the third grounding unit 11 to the second gap 12 is less than the fifth distance from the second connection point to the second gap 12. The second connection point is the connection point on the second parasitic radiating branch 10 that is connected to the second tuning unit 14.

[0058] This application is based on Figure 4In the designed antenna structure, the inherent resonant frequency of the second parasitic radiating branch 10 is determined. When fed through the first antenna, the excited current in the same direction increases the equivalent aperture of the first antenna or changes the resonant mode of the first antenna, thereby improving the passive efficiency of the first antenna. However, this antenna structure only has a significant effect on improving the frequency band near the inherent resonant frequency of the second parasitic radiating branch 10. In this embodiment, however, in... Figure 4 Based on the designed antenna structure, a second tuning unit 14 is introduced into the second parasitic radiating branch 10 (see [reference]). Figure 6 This is used to adjust the resonant frequency of the second parasitic radiating branch 10, thereby enabling a directional improvement in the passive efficiency of the first antenna in a certain frequency band.

[0059] It should be noted that, in Figure 4 Based on the designed antenna structure, a first tuning unit 13 can be introduced into the first parasitic radiating branch 5, and a second tuning unit 14 can be introduced into the second parasitic radiating branch 10. See [reference needed]. Figure 6 As shown, the resonant frequencies of the first parasitic radiating branch 5 and the second parasitic radiating branch 10 can be adjusted, thus achieving an adjustable three-frequency parasitic effect, which allows for more precise control of the efficiency of the first antenna.

[0060] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0061] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electronic device, characterized in that, include: Flooring; A first antenna, comprising a radiating branch, a feed unit, and a first ground loop unit, wherein the feed unit is electrically connected to the radiating branch; as well as, The first parasitic radiating branch and the second grounding unit are connected to the grounding plate. There is a first gap between the radiating branch and the first parasitic radiating branch, the first grounding unit is connected to the radiating branch and the grounding plate respectively, and the first distance from the power supply unit to the first gap is less than the second distance from the first grounding unit to the first gap. The first parasitic radiating branch includes a first branch section and a second branch section. The first branch section is the branch section between the first grounding point and the first gap. The first grounding point is the grounding point on the first parasitic radiating branch that is connected to the second return ground unit. The length of the first branch section is less than the length of the second branch section. When the first antenna is operating in the first frequency band, the first parasitic radiating branch is excited to generate a current in the same direction as the radiating branch; When the first antenna operates in the second frequency band, the first stub is excited to generate a current in the same direction as the radiating branch, and the second frequency band is higher than the first frequency band.

2. The electronic device according to claim 1, characterized in that, The length of the first parasitic radiating branch is greater than the length of the radiating branch.

3. The electronic device according to claim 1, characterized in that, The radiating branch and the first parasitic radiating branch are disposed on the first frame, and the second grounding point is disposed at the end of the radiating branch away from the first gap. The second grounding point is the grounding point on the radiating branch that is connected to the first grounding unit.

4. The electronic device according to claim 3, characterized in that, The electronic device further includes a second parasitic radiating branch and a third grounding unit, the third grounding unit being connected to the ground plane; The first grounding unit and the second parasitic radiating branch are disposed on the second frame, which is adjacent to the first frame; there is a second gap between the first grounding unit and the second parasitic radiating branch; the second parasitic radiating branch has a third grounding point, which is a grounding point on the second parasitic radiating branch that is connected to the third grounding unit, and the third grounding point is disposed at one end of the second parasitic radiating branch near the second gap. When the first antenna operates in the third frequency band, the second parasitic radiating branch is excited to generate a current in the same direction as the radiating branch. The third frequency band is greater than the first frequency band and less than the second frequency band.

5. The electronic device according to claim 4, characterized in that, The second parasitic radiating branch is spatially perpendicular to the radiating branch.

6. The electronic device according to claim 1, characterized in that, The electronic device further includes a first tuning unit, which is connected between the ground plane and the first parasitic radiating branch. The length of the first branch is less than the third distance from the first connection point to the first gap. The first connection point is the connection point on the first parasitic radiating branch that is connected to the first tuning unit.

7. The electronic device according to claim 4 or 6, characterized in that, The electronic device further includes a second tuning unit, which is connected between the ground plane and the second parasitic radiating branch. The fourth distance from the third grounding unit to the second gap is less than the fifth distance from the second connection point to the second gap. The second connection point is the connection point on the second parasitic radiating branch that is connected to the second tuning unit.

8. The electronic device according to claim 1, characterized in that, The first antenna is an inverted F antenna.

9. The electronic device according to claim 1, characterized in that, The second ground unit and the first parasitic radiating branch form a T-shaped structure.

10. The electronic device according to claim 4, characterized in that, Both the first and second borders are metal borders.

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