Dual-band antenna and electronic equipment

Abstract

The present application discloses a dual-band antenna and electronic device, which relate to the field of signal transmission. In this solution, the dual-band antenna includes a radiating branch, a first grounding branch, and a second grounding branch, wherein the first end of the first grounding branch extends out of the first end of the radiating branch, and the first grounding branch surrounds the radiating branch, and a notch is provided at the first end of the radiating branch, a gap is provided between the radiating branch and the first grounding branch, and the second grounding branch is connected to the first end of the first grounding branch. Through the method in the present application, the radiating branch can interact with the second grounding branch to generate a first working frequency band, and the radiating branch generates coupled radiation on the first grounding branch. At this time, the first grounding branch and the second grounding branch can interact to generate a second working frequency band, that is, the dual-band antenna in the present application can generate two working frequency bands, which can meet the needs of wireless devices that require two working frequency bands.

Description

Technical Field

[0001] The present application relates to the field of signal transmission, and in particular to a dual-band antenna and electronic equipment. Background Art

[0002] The general antenna adopts the design of dipole antenna or loop antenna. For details, please refer to Figure 1a and Figure 1b , Figure 1a It is a structural diagram of a dipole antenna in the prior art. Figure 1b Schematic diagram of the structure of a loop antenna in the prior art. Figure 1a In the antenna, the dipole antenna radiation branch is connected to the inner core of the coaxial feeder (the feeding end of the coaxial feeder), the ground branch is connected to the outer skin of the coaxial feeder (the ground end of the coaxial feeder), and the radiation branch and the ground branch are distributed on both sides of the coaxial feeder to form the radiation of the antenna. Figure 1b In the loop antenna, the radiation passes from the inner core of the coaxial feeder through the antenna and then connects to the outer skin of the coaxial feeder to complete the radiation of the antenna.

[0003] However, the above two antenna designs can only form one antenna resonance, that is, the above antennas can only operate in one working frequency band and cannot support two working frequency bands, and cannot meet the needs of wireless devices that require two working frequency bands. Summary of the Invention

[0004] The purpose of this application is to provide a dual-band antenna and electronic equipment that can generate two operating frequency bands to meet the needs of wireless devices that require two operating frequency bands.

[0005] To solve the above technical problems, the present application provides a dual-band antenna, comprising:

[0006] A radiation branch, a first end of which is connected to a feeding end of a feeding power source;

[0007] a first grounding branch, wherein a first end is connected to a ground terminal of the power supply and extends beyond the first end of the radiating branch, the first grounding branch surrounds the radiating branch, a notch is provided at the first end of the radiating branch, and a gap is provided between the first grounding branch and the radiating branch;

[0008] a second grounding branch, a first end of which is connected to the first end of the first grounding branch;

[0009] Under the feeding excitation of the feeding power source, the radiating branch works together with the second grounding branch to generate a first working frequency band, and works together with the first grounding branch and the second grounding branch to generate a second working frequency band.

[0010] Preferably, the first grounding branch includes a first branch portion, a second branch portion and a third branch portion;

[0011] The first branch portion is arranged on the first side of the radiation branch, the second branch portion is arranged on the second side of the radiation branch, and the third branch portion is arranged on the third side of the radiation branch, the third side is opposite to the first side, and the second side is located between the first side and the second side; the first end of the first branch portion serves as the first end of the first grounding branch, the first end of the second branch portion is connected to the second end of the first branch portion, the second end of the second branch portion is connected to the first end of the third branch portion, and the second end of the third branch portion is aligned with the middle of the radiation branch.

[0012] Preferably, the radiation branch and / or the second grounding branch is a rectangular structure.

[0013] Preferably, the first branch portion, the second branch portion and the third branch portion are all rectangular structures.

[0014] Preferably, the second end of the second grounding branch is arranged in an extending direction of the first branch portion from the second end to the first end.

[0015] Preferably, the first grounding branch and the second grounding branch are integrally formed.

[0016] Preferably, the first grounding branch and / or the second grounding branch is a ground plane on the PCB board where the first grounding branch is located.

[0017] Preferably, when the feed source is a coaxial feeder, the inner core of the coaxial feeder is connected to the first end of the radiation branch, and the outer skin of the coaxial feeder is respectively connected to the first end of the first ground branch and the first end of the second ground branch.

[0018] Preferably, the first end of the first grounding branch and the first end of the second grounding branch are arranged on the axis of the length direction of the coaxial feeder, the radiation branch and the first grounding branch are arranged on one side of the axis of the coaxial feeder, and the second grounding branch is arranged on the other side of the axis of the coaxial feeder.

[0019] To solve the above technical problems, the present application also provides an electronic device, including the dual-band antenna as described above.

[0020] The present application provides a dual-band antenna, which relates to the field of signal transmission. In this solution, the dual-band antenna includes a radiating branch, a first grounding branch, and a second grounding branch, wherein the first end of the first grounding branch extends out of the first end of the radiating branch, and the first grounding branch surrounds the radiating branch, and a notch is provided at the first end of the radiating branch, a gap is provided between the radiating branch and the first grounding branch, and the second grounding branch is connected to the first end of the first grounding branch. Through the method in the present application, the radiating branch can interact with the second grounding branch to generate a first working frequency band, and the radiating branch generates coupled radiation on the first grounding branch. At this time, the first grounding branch and the second grounding branch can interact to generate a second working frequency band, that is, the dual-band antenna in the present application can generate two working frequency bands, which can meet the needs of wireless devices that require two working frequency bands.

[0021] The present application also provides an electronic device having the same beneficial effects as the dual-band antenna described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1a It is a structural diagram of a dipole antenna in the prior art;

[0024] Figure 1b Schematic diagram of the structure of a loop antenna in the prior art;

[0025] Figure 2 A schematic diagram of the structure of a dual-band antenna provided in this application;

[0026] Figure 3 A schematic diagram of the resonant return loss generated by a dual-band antenna provided in this application;

[0027] Figure 4 Schematic diagram of the resonant return loss generated by a dual-band antenna in the prior art. DETAILED DESCRIPTION

[0028] The core of this application is to provide a dual-band antenna and electronic equipment that can generate two working frequency bands to meet the needs of wireless devices that require two working frequency bands.

[0029] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a dual-band antenna provided in this application, which includes:

[0031] The radiation branch 11 has a first end connected to a feeding end of a feeding power source;

[0032] A first grounding branch 12 has a first end connected to the ground terminal of the power supply and extends beyond the first end of the radiating branch 11. The first grounding branch 12 surrounds the radiating branch 11 and has a notch at the first end of the radiating branch 11. A gap is provided between the first grounding branch 12 and the radiating branch 11.

[0033] A second grounding branch 13, a first end of which is connected to the first end of the first grounding branch 12;

[0034] Under the excitation of the feeding power source, the radiation branch 11 cooperates with the second grounding branch 13 to generate a first working frequency band, and cooperates with the first grounding branch 12 and the second grounding branch 13 to generate a second working frequency band.

[0035] Specifically, the present application adopts a combination of a radiation branch 11 and two grounding branches to generate two working frequency bands. Its specific working principle is: first, the radiation branch 11 acts on the second grounding branch 13 to generate a working frequency band, which will form a working frequency band that is the third harmonic of the first working frequency band. Furthermore, the first grounding branch 12 surrounds the radiation branch 11, and a gap is left at the first end of the radiation branch 11, that is, the structure of the first grounding branch 12 has a curved portion, and in the curved structural portion, the current has a variable speed, so the radiation branch 11 can generate coupled radiation on the first grounding branch 12. Under the coupling action of the radiation branch 11, the first grounding branch 12 acts on the second grounding branch 13 to generate the required second working frequency band.

[0036] Among them, it is assumed that the first grounding branch 12 is located on the left side of the plane around the radiation branch 11. At this time, the first end of the second grounding branch 13 is connected to the first end of the first grounding branch 12, and the other end of the second grounding branch 13 is to the right of its own first end, that is, the entire second grounding branch 13 is located to the right of the first grounding branch 12 and the radiation branch, so that two working frequency bands can be generated in the structure.

[0037] Specifically, the specific shapes of the first grounding branch 12, the second grounding branch 13 and the radiation branch 11 are not particularly limited in this application. They can be rectangular or any irregular structure, as long as the first grounding branch 12 surrounds the radiation branch 11 and has a gap, and the second grounding branch 13 and the first grounding branch 12 are distributed on opposite sides.

[0038] In addition, it should be noted that the structure between the first ground branch 12 and the radiating branch 11 in this application only needs to satisfy the following conditions: the first ground branch 12 surrounds the radiating branch 11 in projection and a notch is provided at the first end of the radiating branch 11. In other words, the first ground branch 12 and the radiating branch 11 are not limited to being on the same plane. For example, the first ground branch 12 can be provided on the upper side of the coaxial feeder and the radiating branch 11 can be provided on the lower layer of the coaxial feeder, as long as both meet the above structure.

[0039] As a preferred embodiment, the first grounding branch 12 and / or the second grounding branch 13 is a ground plane on the PCB board where the first grounding branch 12 and / or the second grounding branch 13 are located.

[0040] It should also be noted that the specific implementation of the first grounding branch 12 and the second grounding branch 13 in this application can be any method as long as they meet the requirements of a grounding structure. There are many ways to implement the grounding, such as grounding patches or grounding traces on the PCB board where they are located, or any grounded metal device on the PCB board, and this application does not limit this. As long as the structure meets the above requirements, it will be sufficient.

[0041] As a preferred embodiment, the first grounding branch 12 and the second grounding branch 13 are integrally formed.

[0042] In one embodiment, the first grounding branch 12 and the second grounding branch 13 are integrally formed, that is, the first grounding branch 12 and the second grounding branch 13 are a single unit. Of course, based on the above structure, the first grounding branch 12 and the second grounding branch 13 can be formed as two separate parts or as a single unit to achieve the dual-band function.

[0043] As a preferred embodiment, the first grounding branch 12 includes a first branch portion, a second branch portion and a third branch portion;

[0044] Among them, the first branch portion is arranged on the first side of the radiation branch 11, the second branch portion is arranged on the second side of the radiation branch 11, and the third branch portion is arranged on the third side of the radiation branch 11, the third side is opposite to the first side, and the second side is located between the first side and the second side; the first end of the first branch portion serves as the first end of the first grounding branch 12, the first end of the second branch portion is connected to the second end of the first branch portion, the second end of the second branch portion is connected to the first end of the third branch portion, and the second end of the third branch portion is aligned with the middle of the radiation branch 11.

[0045] This embodiment aims to define the specific relative structure between the first grounding branch 12 and the radiation branch 11. Specifically, the first grounding branch 12 includes three branches, namely a first branch, a second branch and a third branch. Since the first grounding branch 12 surrounds the radiation patch and a notch is provided at the first end of the radiation patch, the relative positions of the three branches and the radiation patch are described as follows: the first branch is on the first side of the radiation patch (assuming it is on the upper side of the radiation patch), the third branch is on the third side of the radiation patch, and the third side is opposite to the first side (that is, the third branch is on the lower side of the radiation patch), and the second branch is on the second side between the first side and the third side (that is, the second branch is on the left side of the radiation branch 11). In addition, the second end of the third branch is aligned with the middle of the radiation branch 11, indicating that the portion between the second end of the third branch and the first end of the first branch that does not surround the radiation branch 11 is the notch described above.

[0046] It should be noted here that the second end of the third branch portion in this application is aligned with the middle of the radiation branch 11. The middle here refers to any position between the first end and the second end of the radiation branch 11, not just the center point.

[0047] As a preferred embodiment, the radiation branch 11 and / or the second ground branch 13 is a rectangular structure.

[0048] As a preferred embodiment, the first branch portion, the second branch portion and the third branch portion are all rectangular structures.

[0049] In a specific embodiment, to facilitate user design, the first branch portion, the second branch portion, and the third branch portion are all configured as rectangular structures. In addition, the radiation branch 11 and the second ground branch 13 are also configured as rectangular structures.

[0050] However, it is not limited to the rectangular structure exemplified above, and may also be any other irregular structure, which is not limited in this application.

[0051] As a preferred embodiment, the second end of the second grounding branch 13 is arranged in the extending direction of the first branch portion from the second end to the first end.

[0052] Specifically, since the second grounding branch 13 and the first grounding branch 12 need to be arranged on both sides respectively, in a specific embodiment, the second end of the second grounding branch 13 is arranged in the extension direction of the first branch from the second end to the first end, that is, it can be understood that the second grounding branch 13 has the same axial direction as the first branch.

[0053] As a preferred embodiment, when the feeding power source is a coaxial feeder; the inner core of the coaxial feeder is connected to the first end of the radiation branch 11, and the outer skin of the coaxial feeder is respectively connected to the first end of the first grounding branch 12 and the first end of the second grounding branch 13.

[0054] This embodiment aims to limit the specific implementation method of the above-mentioned feed power source, which can specifically be a coaxial feeder. In this case, the inner core of the coaxial feeder is the feed end of the feed power source, which is connected to the first end of the radiation branch 11, and the outer skin of the coaxial feeder is the grounding end, which is respectively connected to the first end of the first grounding branch 12 and the first end of the second grounding branch 13.

[0055] Of course, the specific implementation of the feed power source is not limited to the above examples, and can also be a waveguide, microstrip line or strip line, etc., and this application will not limit it here.

[0056] As a preferred embodiment, the first end of the first grounding branch 12 and the first end of the second grounding branch 13 are arranged on the axis of the length direction of the coaxial feeder, the radiation branch 11 and the first grounding branch 12 are arranged on one side of the axis of the coaxial feeder, and the second grounding branch 13 is arranged on the other side of the axis of the coaxial feeder.

[0057] Furthermore, when the above-mentioned feeding power source is a coaxial feeder, the axis of the coaxial feeder can be used as a reference, and specifically the connection between the first grounding branch 12 and the second grounding branch 13 can be set on the axis of the coaxial feeder. At this time, the first grounding branch 12 and the second grounding branch 13 are located on both sides of the axis.

[0058] Specifically, in a specific embodiment, the first ground branch 12 generates an antenna resonance with the second ground branch 13 in a working frequency band of 2.4 GHz to 2.5 GHz under the action of the radiation branch 11. The radiation branch 11 and the second ground branch 13 form an antenna resonance with a working frequency band between 2.5 GHz and 5 GHz. This resonance will form a third harmonic in the working frequency band of 5.15 GHz to 5.85 GHz, thereby completing dual-band antenna radiation.

[0059] The dual-band antenna in the present application has an antenna resonance with an operating frequency band between 5.15 GHz and 5.85 GHz, which is not formed by the resonance with an operating frequency band between 2.4 GHz and 2.5 GHz. Therefore, modifying the operating frequency band between 2.4 GHz and 2.5 GHz does not affect the operating frequency band between 5.15 GHz and 5.85 GHz, and vice versa. Compared with the dual-band antenna in the prior art that generates a second operating frequency band based on the first operating frequency band, the method in the present application facilitates the design of the antenna without sacrificing the bandwidth or performance of any frequency band between 2.4 GHz and 2.5 GHz or 5.15 GHz and 5.85 GHz.

[0060] When adjusting the 2.4GHz to 2.5GHz resonance, the antenna's resonance can be adjusted by changing the length of the second ground branch 13, or by adjusting the gap formed by the first ground branch 12 and the radiating branch 11, or both simultaneously. When tuning the antenna's resonance between 5.15GHz and 5.85GHz, the length of the radiating branch 11, the length of the first ground branch 12 at its opening (i.e., the size of the gap), or both simultaneously. These adjustments do not affect each other, allowing for optimal performance in either frequency band without sacrificing antenna performance in any particular frequency band.

[0061] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the resonant return loss generated by a dual-band antenna provided in this application. Figure 3 As can be seen, the antenna produces three resonances (respectively Figure 3 The three troughs of the middle curve) are the 2.4GHz~2.5GHz (leftmost trough) and 5.15GHz~5.85GHz (rightmost trough) frequency bands required for the antenna to operate, while the resonant frequency band between 2.5GHz~5GHz (the middle trough) in the figure is not the working frequency band of the antenna. The significance of this frequency band is to generate the third harmonic to operate at 5.15GHz~5.85GHz. When the 5.15GHz~5.85GHz frequency band needs to be adjusted, it can be adjusted by adjusting this resonance.

[0062] Specifically, please refer to Table 1, which is a comparison table of the efficiency of the dual-band antenna in this application and the antenna in the prior art:

[0063] Table 1

[0064]

[0065] Please refer to Figure 4 , Figure 4 Schematic diagram of the resonant return loss generated by the dual-band antenna in the prior art. Figure 4There are two resonances, one at 2.4GHz~2.5GHz and the other at 5.15GHz~5.85GHz. Figure 4 It can be seen from the figure that the return loss from 5.15GHz to 5.85GHz is only about -7dB. Figure 3 It can be seen that the shallowest resonance of the dual-band antenna in this application from 5.15GHz to 5.85GHz is -8.4dB, and the deepest resonance exceeds -20dB. It can be seen that the dual-band antenna in this application improves the resonance depth of 5.15GHz to 5.85GHz. Through passive testing, the efficiency comparison of the general dual-band antenna design and the efficiency of the dual-band antenna in this application can be obtained from Table 1, among which the efficiency of the 2.4GHz to 2.5GHz band is improved by about 0.6dB, and the efficiency of the 5.15GHz to 5.85GHz band is improved by about 1.2dB.

[0066] To solve the above technical problems, the present application also provides an electronic device, including the dual-band antenna as described above.

[0067] For an introduction to the electronic device, please refer to the above embodiments, and this application will not go into details here.

[0068] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0069] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-band antenna, characterized in that: include: A radiation branch, a first end of which is connected to a feeding end of a feeding power source; a first grounding branch, wherein a first end is connected to a ground terminal of the power supply and extends beyond the first end of the radiating branch, the first grounding branch surrounds the radiating branch, a notch is provided at the first end of the radiating branch, and a gap is provided between the first grounding branch and the radiating branch; a second grounding branch, a first end of which is connected to the first end of the first grounding branch; The radiation branch, under the excitation of the feeding power source, works together with the second grounding branch to generate a first operating frequency band, and works together with the first grounding branch and the second grounding branch to generate a second operating frequency band; The first grounding branch surrounds the radiation branch and is provided with a gap, and the second grounding branch and the first grounding branch are distributed on two opposite sides.

2. The dual-band antenna according to claim 1, wherein: The first grounding branch includes a first branch portion, a second branch portion and a third branch portion; The first branch portion is arranged on the first side of the radiation branch, the second branch portion is arranged on the second side of the radiation branch, and the third branch portion is arranged on the third side of the radiation branch, the third side is opposite to the first side, and the second side is located between the first side and the second side; the first end of the first branch portion serves as the first end of the first grounding branch, the first end of the second branch portion is connected to the second end of the first branch portion, the second end of the second branch portion is connected to the first end of the third branch portion, and the second end of the third branch portion is aligned with the middle of the radiation branch.

3. The dual-band antenna according to claim 2, wherein: The radiation branch and / or the second grounding branch are / is a rectangular structure.

4. The dual-band antenna according to claim 2, wherein: The first branch portion, the second branch portion, and the third branch portion are all rectangular structures.

5. The dual-band antenna according to claim 4, wherein: The second end of the second grounding branch is disposed in an extending direction of the first branch portion from the second end to the first end.

6. The dual-band antenna according to claim 1, wherein: The first grounding branch and the second grounding branch are integrally formed.

7. The dual-band antenna according to claim 1, wherein: The first grounding branch and / or the second grounding branch is / are a ground plane on the PCB board where the first grounding branch and / or the second grounding branch are located.

8. The dual-band antenna according to any one of claims 1 to 7, wherein: When the feed source is a coaxial feeder, the inner core of the coaxial feeder is connected to the first end of the radiation branch, and the outer skin of the coaxial feeder is connected to the first end of the first ground branch and the first end of the second ground branch respectively.

9. The dual-band antenna according to claim 8, wherein: The first end of the first grounding branch and the first end of the second grounding branch are arranged on the axis of the length direction of the coaxial feeder, the radiation branch and the first grounding branch are arranged on one side of the axis of the coaxial feeder, and the second grounding branch is arranged on the other side of the axis of the coaxial feeder.

10. An electronic device, characterized in that: The dual-band antenna comprises the dual-band antenna according to any one of claims 1 to 9.

Images