Dual-band antenna, electronic device and wearable device

Abstract

The present application discloses a dual-band antenna, electronic device, and wearable device, relating to the field of signal transmission. In addition to the original antenna, that is, the first radiating branch, the second radiating branch, and the feed branch, the dual-band antenna further includes a conduction circuit between the feed branch and the first radiating branch and / or the second radiating branch. When the feed power source feeds excitation, the conduction circuit is used to adjust the overall impedance of the original antenna. Furthermore, the current path on the surface of the radiating branch is changed, so that the dual-band antenna can couple in a single frequency band, thereby increasing the bandwidth of the first operating frequency band. At the same time, the dual-band operating characteristics can be achieved through resonance, thereby improving the radiation performance of the antenna, and thereby improving the consistency and fault tolerance of the antenna.

Description

Technical Field

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

[0002] Antennas in popular electronic products are often required to operate in two frequency bands (e.g., 2.4GHz and 5GHz) to accommodate a wide range of use cases. Installing these antennas in small products like smart bracelets and watches presents limited stacking space and significant assembly challenges, posing significant challenges to antenna performance consistency. For example, factors such as motors and batteries can affect antenna consistency, making it relatively difficult to improve assembly accuracy and optimize stacking.

[0003] In existing technology, increasing antenna bandwidth increases fault tolerance, thereby ensuring antenna consistency and related performance. Currently, a common method for increasing antenna bandwidth is to add a parasitic antenna coupling unit operating in the same frequency band, increasing bandwidth by coupling the main antenna with the parasitic antenna. However, this method requires an additional parasitic antenna branch, which, along with the wiring required to connect it in the electronic product's circuit, increases space and the cost of the electronic product itself.

[0004] Therefore, it is particularly important to provide a dual-band antenna that can improve antenna bandwidth while relatively not increasing the occupied space. Summary of the Invention

[0005] The purpose of this application is to provide a dual-band antenna, electronic device and wearable device. When the feeding power supply is excited, the overall impedance of the original antenna is adjusted using a conductive circuit. In addition, the current path on the surface of the radiating branch is changed, so that the dual-band antenna can be coupled in a single frequency band to increase the bandwidth of the first working frequency band. At the same time, the dual-band working characteristics can be achieved through resonance, thereby improving the radiation performance of the antenna, and thereby improving the consistency and fault tolerance of the antenna.

[0006] To solve the above technical problems, the present application provides a dual-band antenna, comprising:

[0007] An original antenna comprising a feeding branch, a first radiating branch, and a second radiating branch, wherein the feeding branch is connected to a feeding power supply via a feeding point, one end of the first radiating branch and one end of the second radiating branch are both connected to the feeding branch, and the first radiating branch and the second radiating branch are respectively provided on both sides of the feeding branch;

[0008] Conductive paths, respectively connected to the feeding branch, the first radiating branch and / or the second radiating branch;

[0009] Under the feeding excitation of the feeding power supply, the first radiating branch and the second radiating branch jointly generate at least one first operating frequency band with a bandwidth of the first bandwidth; the first radiating branch, the second radiating branch and the conductive path jointly generate a second operating frequency band and a first operating frequency band with a bandwidth of the second bandwidth, and the second bandwidth is greater than the first bandwidth.

[0010] Preferably, the conductive path comprises:

[0011] a first conductive path, one end of which is connected to the feeding branch, and the other end of which is connected to the first radiating branch;

[0012] A second conductive path has one end connected to the feeding branch and the other end connected to the second radiation branch.

[0013] Preferably, the first conductive path and the second conductive path are LC equivalent circuits.

[0014] Preferably, the first conductive path and the second conductive path both include capacitors;

[0015] One end of the capacitor in the first conductive path is connected to the feeding point, and the other end is connected to the first radiating branch; one end of the capacitor in the second conductive path is connected to the feeding point, and the other end is connected to the second radiating branch.

[0016] Preferably, the original antenna is a monopole antenna.

[0017] Preferably, the first radiating branch includes a first sub-radiating branch and a second sub-radiating branch; the first sub-radiating branch is connected to the feeding branch and intersects at a first point, the second sub-radiating branch is connected to the feeding branch and intersects at a second point, and the distance between the first point and the feeding power supply is greater than the distance between the second point and the feeding power supply.

[0018] Preferably, the first sub-radiating branch includes a first rectangular portion and a second rectangular portion; the first end of the first rectangular portion is connected to the feeding branch and intersects at a first point, the second end of the first rectangular portion is connected to the first end of the second rectangular portion, the first rectangular portion is arranged on the first side of the second sub-radiating branch, the second rectangular portion is arranged on the second side of the second sub-radiating branch, and the first side is adjacent to the second side.

[0019] Preferably, the second radiating branch is a rectangular structure, and the second radiating branch is parallel to the feeding branch.

[0020] To solve the above technical problems, the present application also provides an electronic device, including the dual-band antenna as described above.

[0021] To solve the above technical problems, the present application also provides a wearable device, comprising the dual-band antenna as described above.

[0022] The present application provides a dual-band antenna, relating to the field of signal transmission. In addition to the original antenna, namely, the first radiating branch, the second radiating branch, and the feed branch, the dual-band antenna further includes a conductive circuit between the feed branch and the first radiating branch and / or the second radiating branch. This circuit adjusts the overall impedance of the original antenna when the feed power source is excited. Furthermore, the current path on the surface of the radiating branch is altered, allowing the dual-band antenna to couple in a single frequency band, thereby increasing the bandwidth of the first operating frequency band. Furthermore, the dual-band antenna can achieve dual-band operating characteristics through resonance, thereby improving the antenna's radiation performance and, in turn, its consistency and fault tolerance.

[0023] The present application also provides an electronic device and a wearable device, which have the same beneficial effects as the dual-band antenna described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 creative work.

[0025] Figure 1 A structural block diagram of a dual-band antenna provided in this application;

[0026] Figure 2 A schematic diagram of the structure of an original antenna provided in this application;

[0027] Figure 3 This is a specific schematic diagram of a dual-band antenna provided in this application. DETAILED DESCRIPTION

[0028] The core of this application is to provide a dual-band antenna, electronic device and wearable device. When the feeding power supply is excited, the overall impedance of the original antenna is adjusted using a conductive circuit. In addition, the current path on the surface of the radiating branch is changed, so that the dual-band antenna can be coupled in a single frequency band to increase the bandwidth of the first working frequency band. At the same time, the dual-band working characteristics can be achieved through resonance, thereby improving the radiation performance of the antenna, and thereby improving the consistency and fault tolerance of the antenna.

[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 1 , Figure 1 This is a structural block diagram of a dual-band antenna provided in this application, which includes:

[0031] An original antenna including a feeding branch 11, a first radiating branch 12, and a second radiating branch 13, wherein the feeding branch 11 is connected to a feeding power supply via a feeding point, one end of the first radiating branch 12 and one end of the second radiating branch 13 are both connected to the feeding branch 11, and the first radiating branch 12 and the second radiating branch 13 are respectively provided on both sides of the feeding branch 11;

[0032] Conductive paths 14 are respectively connected to the feeding branch 11, the first radiating branch 12 and / or the second radiating branch 13;

[0033] Under the feeding excitation of the feeding power supply, the first radiating branch 12 and the second radiating branch 13 work together to generate at least one first working frequency band with a bandwidth of the first bandwidth; the first radiating branch 12, the second radiating branch 13 and the conductive path 14 work together to generate a second working frequency band and a first working frequency band with a bandwidth of the second bandwidth, and the second bandwidth is greater than the first bandwidth.

[0034] For details, please refer to Figure 2 , Figure 2 A schematic structural diagram of an original antenna provided for this application. The original antenna includes a feed branch 11, a first radiating branch 12, and a second radiating branch 13. The original antenna is a monopole antenna, which can be, but is not limited to, a monopole antenna. This original antenna can generate a first working frequency band, or can generate two working frequency bands respectively (the first working frequency band and the second working frequency band respectively, such as the first working frequency band is 2.4 GHz, and the second working frequency band is 5 GHz. At this time, the corresponding first radiating branch 12 on the left is a branch that generates the first working frequency band, and the second radiating branch 13 on the right is a branch that generates the second working frequency band. At this time, the bandwidth of the first working frequency band is narrower, and the bandwidth of the second working frequency band is also narrower).

[0035] Therefore, the present application sets a conductive path 14 between the feeding branch 11 and the first radiating branch 12, and / or, between the feeding branch 11 and the second radiating branch 13. Through this conductive path 14, the current path of the original antenna as a whole can be changed, so that dual resonance can be generated in a single-band coupling and the bandwidth can be increased (specifically, the bandwidth of the first working frequency band and / or the second working frequency band can be increased). At the same time, resonance can also be formed in the second working frequency band (specifically 5GHz) to achieve dual-frequency working characteristics.

[0036] It should be noted that if the conductive path 14 is not used, the antenna surface current cannot be changed, and will not flow to the two branches (the first radiation branch 12 and the second radiation branch 13), so dual resonance cannot be formed, and the purpose of expanding the bandwidth cannot be achieved.

[0037] It should also be noted that without using this conductive path 14, the currents in the two radiating branches have the same direction and phase, and some of them will cancel each other out, affecting the bandwidth and radiation performance of the original antenna. Therefore, by using the conductive path 14 in this application, the original antenna's impedance is optimized while expanding the bandwidth, thereby expanding the original antenna's bandwidth while also improving the original antenna's radiation performance, thereby improving the antenna's consistency and fault tolerance.

[0038] As a preferred embodiment, the conductive path 14 includes:

[0039] a first conductive path, one end of which is connected to the feeding branch 11 and the other end of which is connected to the first radiating branch 12;

[0040] The second conductive path has one end connected to the feeding branch 11 and the other end connected to the second radiation branch 13 .

[0041] Specifically, the conductive paths 14 in the present application include two, one of which is arranged between the feeding branch 11 and the first radiating branch 12, for changing the current direction of the first radiating branch 12; the other is arranged between the feeding branch 11 and the second radiating branch 13, for changing the current direction on the second radiating branch 13.

[0042] When the first conductive path and the second conductive path are specifically connected to the feeding branch 11, they are connected to the feeding point on the feeding branch 11, and the current directions of the two radiating branches are changed through the two conductive paths 14, so that they resonate with the first radiating branch 12 and the second radiating branch 13 to generate a first working frequency band and a second working frequency band of a second bandwidth, wherein the second bandwidth is greater than the first bandwidth.

[0043] As a preferred embodiment, the first conductive path and the second conductive path are LC equivalent circuits.

[0044] The present application aims to provide a specific implementation of the conductive path 14 . Specifically, in order to control the design cost of the antenna, a relatively low-cost LC equivalent circuit is selected as the conductive path 14 in this embodiment.

[0045] The capacitor and the inductor in the LC equivalent circuit resonate with the first radiation branch 12 and the second radiation branch 13 to generate a first operating frequency band and a second operating frequency band of a first bandwidth.

[0046] As a preferred embodiment, the first conductive path and the second conductive path both include capacitors;

[0047] One end of the capacitor in the first conductive path is connected to the feed point, and the other end is connected to the first radiation branch 12 ; one end of the capacitor in the second conductive path is connected to the feed point, and the other end is connected to the second radiation branch 13 .

[0048] The present application aims to provide a specific implementation of a first conductive path and a second conductive path. Specifically, in order to reduce the number of electronic devices required in the LC equivalent circuit, a capacitor is selected as the first conductive path and the second conductive path in the present application.

[0049] It can be seen that the conductive path 14 in the present application uses fewer electronic components, thereby reducing the cost of the antenna.

[0050] For details, please refer to Figure 3 , Figure 3 This is a specific schematic diagram of a dual-band antenna provided in this application.

[0051] As a preferred embodiment, the first radiating branch 12 includes a first sub-radiating branch and a second sub-radiating branch; the first sub-radiating branch is connected to the feeding branch 11 and intersects at a first point, and the second sub-radiating branch is connected to the feeding branch 11 and intersects at a second point, and the distance between the first point and the feeding power supply is greater than the distance between the second point and the feeding power supply.

[0052] Specifically, the present application aims to provide a structure of a first radiating branch 12. In one specific embodiment, the first radiating branch 12 includes two sub-radiating branches, namely a first sub-radiating branch and a second sub-radiating branch. In this case, correspondingly, under the feeding excitation of the feeding power supply, the first sub-radiating branch, the second sub-radiating branch, the second radiating branch 13, and the feeding branch jointly generate at least one first operating frequency band of a first bandwidth. In addition, under the feeding excitation of the feeding power supply, the first sub-radiating branch, the second sub-radiating branch, the second radiating branch 13, the feeding branch, and the above-mentioned two capacitors jointly generate a first operating frequency band of a second bandwidth and a second operating frequency band. The second bandwidth is greater than the first bandwidth.

[0053] As a preferred embodiment, the first sub-radiating branch includes a first rectangular portion and a second rectangular portion; the first end of the first rectangular portion is connected to the feed branch 11 and intersects at a first point, the second end of the first rectangular portion is connected to the first end of the second rectangular portion, the first rectangular portion is arranged on the first side of the second sub-radiating branch, and the second rectangular portion is arranged on the second side of the second sub-radiating branch, and the first side is adjacent to the second side.

[0054] This embodiment provides a relative structural position of a first sub-radiating branch and a second sub-radiating branch, wherein the first sub-radiating branch has a semi-rectangular structure (including the first rectangular portion and the second rectangular portion), and the first rectangular portion and the second rectangular portion are respectively disposed on a first side and a second side of the second sub-radiating branch. In other words, the first sub-radiating branch and the second sub-radiating branch semi-enclose each other.

[0055] As a preferred embodiment, the second radiation branch 13 is a rectangular structure, and the second radiation branch 13 is parallel to the feeding branch 11 .

[0056] This embodiment aims to provide a structure and position of a second radiation branch 13, which can be, but is not limited to, a rectangular structure and is parallel to the feeding branch 11, such as Figure 3 In the figure, the second radiation branch 13 is located on the right side of the feeding branch 11.

[0057] To solve the above technical problems, the present application also provides an electronic device, including the dual-band antenna as described above.

[0058] To solve the above technical problems, the present application also provides a wearable device, including the dual-band antenna as described above.

[0059] For the introduction of electronic devices and wearable devices, please refer to the above embodiments, and this application will not go into details here.

[0060] 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.

[0061] 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: An original antenna comprising a feeding branch, a first radiating branch, and a second radiating branch, wherein the feeding branch is connected to a feeding power supply via a feeding point, one end of the first radiating branch and one end of the second radiating branch are both connected to the feeding branch, and the first radiating branch and the second radiating branch are respectively provided on both sides of the feeding branch; Conductive paths, respectively connected to the feeding branch, the first radiating branch and / or the second radiating branch; Under the feeding excitation of the feeding power supply, the first radiating branch and the second radiating branch work together to generate at least one first operating frequency band with a first bandwidth; The first radiation branch, the second radiation branch and the conductive path jointly generate a second operating frequency band and a first operating frequency band having a second bandwidth, wherein the second bandwidth is greater than the first bandwidth; The conductive path includes: a first conductive path, one end of which is connected to the feeding branch, and the other end of which is connected to the first radiating branch; a second conductive path, one end of which is connected to the feeding branch, and the other end of which is connected to the second radiating branch; The first conductive path and the second conductive path both include capacitors; One end of the capacitor in the first conductive path is connected to the feeding point, and the other end is connected to the first radiating branch; one end of the capacitor in the second conductive path is connected to the feeding point, and the other end is connected to the second radiating branch.

2. The dual-band antenna according to claim 1, wherein: The first conductive path and the second conductive path are LC equivalent circuits.

3. The dual-band antenna according to claim 1, wherein: The original antenna is a monopole antenna.

4. The dual-band antenna according to any one of claims 1 to 3, wherein: The first radiating branch includes a first sub-radiating branch and a second sub-radiating branch; the first sub-radiating branch is connected to the feeding branch and intersects at a first point, the second sub-radiating branch is connected to the feeding branch and intersects at a second point, and the distance between the first point and the feeding power supply is greater than the distance between the second point and the feeding power supply.

5. The dual-band antenna according to claim 4, wherein: The first sub-radiating branch includes a first rectangular portion and a second rectangular portion; the first end of the first rectangular portion is connected to the feeding branch and intersects at a first point, the second end of the first rectangular portion is connected to the first end of the second rectangular portion, the first rectangular portion is arranged on the first side of the second sub-radiating branch, the second rectangular portion is arranged on the second side of the second sub-radiating branch, and the first side is adjacent to the second side.

6. The dual-band antenna according to claim 4, wherein: The second radiation branch is a rectangular structure, and the second radiation branch is parallel to the feeding branch.

7. An electronic device, characterized in that: The dual-band antenna comprises the dual-band antenna according to any one of claims 1 to 6.

8. A wearable device, characterized in that: The dual-band antenna comprises the dual-band antenna according to any one of claims 1 to 6.

Images