Radiation oscillator, low-frequency radiation antenna and multi-band antenna

Abstract

The utility model relates to a radiation oscillator, a low-frequency radiation antenna and a multi-band antenna. Wherein the radiation oscillator comprises a radiation structure, and the radiation structure is used for radiating a signal and comprises a radiation arm; and the first decoupling structure is arranged at the radiation arm and comprises a first branch knot and a second branch knot, and the longitudinal axis of the first branch knot and the longitudinal axis of the second branch knot intersect with each other. According to the utility model, the first decoupling structure is arranged in the radiation oscillator, so that the interference current coupled by the newly arranged decoupling structure and the interference current coupled by the radiation structure can be mutually and approximately counteracted, and high-frequency suppression on the radiation arm of the low-frequency oscillator is realized. In this way, the low-frequency radiation oscillator can reduce the interference of other radiation oscillators such as a high-frequency radiation oscillator to the low-frequency radiation oscillator, so that the radiation performance of the radiation oscillator is improved, meanwhile, the interference of the low-frequency radiation oscillator to other radiation oscillators is reduced, and the radiation performance of other radiation oscillators is improved.

Description

Technical Field

[0001] The utility model relates to the field of communications, and in particular to a radiating element, a low-frequency radiating antenna comprising the radiating element, and a multi-band antenna comprising the low-frequency radiating antenna. Background Art

[0002] With the development of the new generation of mobile communications (especially 5G), the antennas in communication equipment need to cover more and more frequency bands. In the existing multi-band fusion antennas, the mutual coupling interference between different frequency bands has always been one of the key research directions of base station antennas. Among them, the interference of high-frequency radiating oscillators on low-frequency radiating oscillators is usually that the interference current of the low-frequency radiating oscillators cannot be removed. If the interference current is not effectively suppressed, the interference current will be radiated through the low-frequency radiating oscillators, which in turn affects the high-frequency radiating oscillators. Utility Model Content

[0003] Based on the understanding of the prior art, the inventor of the utility model innovatively conceived of setting a decoupling structure on the radiating arm so that the interference current coupled by the newly set decoupling structure and the interference current coupled by the radiating structure can roughly offset each other, thereby achieving high-frequency suppression on the radiating arm of the low-frequency oscillator, effectively improving the radiation performance of the high-frequency radiating oscillator, and achieving the purpose of decoupling.

[0004] Specifically, the utility model proposes a radiating oscillator, which includes: a radiating structure, which is used to radiate signals and includes a radiating arm; and a first decoupling structure, which is arranged at the radiating arm and includes a first branch and a second branch, and the longitudinal axis of the first branch intersects with the longitudinal axis of the second branch.

[0005] A first decoupling structure is provided in the radiating oscillator according to the utility model, so that the interference current coupled by the newly provided decoupling structure and the interference current coupled by the radiating structure can roughly cancel each other out, realize high-frequency suppression on the radiating arm of the low-frequency oscillator, effectively improve the radiation performance of the high-frequency radiating oscillator, and achieve the purpose of decoupling. In this way, the low-frequency radiating oscillator can, for example, maximize the reduction of interference with it by other radiating oscillators, such as high-frequency radiating oscillators, which on the one hand improves the radiation performance of the radiating oscillator according to the utility model, and on the other hand reduces its interference with other radiating oscillators, thereby improving the radiation performance of other radiating oscillators used with it.

[0006] Preferably, in an embodiment of the present invention, the first branch and the second branch are constructed as cantilevers extending from the radiation arm body into the radiation arm. More preferably, in an embodiment of the present invention, the first decoupling structure is arranged at a bend of the radiation arm.

[0007] Additionally, in an embodiment of the present invention, the decoupling structure further includes a second decoupling structure, and the second decoupling structure is disposed between two adjacent first decoupling structures.

[0008] Preferably, in an embodiment of the present invention, the first decoupling structure is constructed in a T-shape.

[0009] Preferably, in an embodiment of the present invention, the radiating element comprises four radiating arms, wherein four first decoupling structures are arranged in association with each radiating arm, and the four first decoupling structures are arranged at four corners of the associated radiating arm.

[0010] Optionally, in an embodiment of the present invention, the radiation element further includes a substrate, and the radiation structure and the first decoupling structure are arranged on the substrate.

[0011] Additionally, in an embodiment of the present invention, the radiation element further includes a balun structure, and the balun structure is configured to feed the radiation structure.

[0012] Preferably, in one embodiment of the present invention, the lengths of the first branch section and the second branch section are different. More preferably, in one embodiment of the present invention, the widths of the first branch section and the second branch section are different.

[0013] Preferably, the longitudinal axis of the first branch section and the longitudinal axis of the second branch section are perpendicular to each other.

[0014] In addition, the second aspect of the present invention proposes a low-frequency radiating antenna, which includes the radiating vibrator proposed according to the first aspect of the present invention. Preferably, in one embodiment of the present invention, the low-frequency radiating antenna is constructed as a plate-shaped dipole low-frequency radiating antenna or a cross-type dipole low-frequency radiating antenna. A first decoupling structure is provided in the low-frequency radiating antenna according to the present invention, so that the interference current coupled by the newly arranged decoupling structure and the interference current coupled by the radiating structure can roughly offset each other, achieve high-frequency suppression on the radiating arm of the low-frequency vibrator, effectively improve the radiation performance of the high-frequency radiating vibrator, and achieve the purpose of decoupling. In this way, the low-frequency radiating vibrator can, for example, maximize the reduction of interference from other radiating vibrators, such as high-frequency radiating vibrators, which on the one hand improves the radiation performance of the radiating vibrator according to the present invention, and on the other hand reduces its interference with other radiating vibrators, thereby improving the radiation performance of other radiating vibrators used with it.

[0015] Furthermore, the third aspect of the present invention proposes a multi-band antenna, which includes: a low-frequency radiating antenna, which is constructed as the low-frequency radiating antenna proposed in the second aspect of the present invention; and a high-frequency radiating antenna, whose operating frequency is higher than the operating frequency of the low-frequency radiating antenna.

[0016] A first decoupling structure is provided in the multi-band antenna according to the utility model, so that the interference current coupled by the newly provided decoupling structure and the interference current coupled by the radiation structure can roughly cancel each other out, realize high-frequency suppression on the radiation arm of the low-frequency radiator, effectively improve the radiation performance of the high-frequency radiation radiator, and achieve the purpose of decoupling. In this way, the low-frequency radiation radiator can, for example, maximize the reduction of interference with other radiation radiators, such as high-frequency radiation radiators, which on the one hand improves the radiation performance of the radiation radiator according to the utility model, and on the other hand reduces its interference with other radiation radiators, thereby improving the radiation performance of other radiation radiators used with it.

[0017] Additionally, in an embodiment of the present invention, the multi-band antenna further comprises a reflector, wherein the low-frequency radiating antenna and the high-frequency radiating antenna are disposed on the same side of the reflector.

[0018] In summary, a first decoupling structure is provided in the radiating vibrator, low-frequency radiating antenna or multi-band antenna according to the utility model, so that the interference current coupled by the newly provided decoupling structure and the interference current coupled by the radiating structure can roughly cancel each other out, thereby achieving high-frequency suppression on the radiating arm of the low-frequency vibrator, effectively improving the radiation performance of the high-frequency radiating vibrator, and achieving the purpose of decoupling. In this way, the low-frequency radiating vibrator can, for example, maximize the reduction of interference with it by other radiating vibrators, such as high-frequency radiating vibrators, which, on the one hand, improves the radiation performance of the radiating vibrator according to the utility model, and on the other hand, reduces its interference with other radiating vibrators, thereby improving the radiation performance of other radiating vibrators used therewith. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The embodiments are shown and explained with reference to the accompanying drawings. These drawings are used to explain the basic principles, and only the aspects necessary for understanding the basic principles are shown. These drawings are not to scale. In the drawings, the same reference numerals represent similar features.

[0020] Figure 1 A top view of a radiation vibrator 100 disclosed according to an embodiment of the utility model is shown;

[0021] Figure 2 A three-dimensional diagram of a radiation vibrator 100 disclosed according to an embodiment of the utility model is shown;

[0022] Figure 3 FIG. 4 shows a top view of a radiation vibrator 300 disclosed according to another embodiment of the present utility model;

[0023] Figure 4 A stereogram showing a radiation vibrator 300 disclosed according to another embodiment of the utility model; and

[0024] Figure 5 FIG. 5 is a schematic diagram of a multi-band antenna 500 according to an embodiment of the present invention.

[0025] Other features, characteristics, advantages and benefits of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0026] In the following specific description of the preferred embodiments, reference will be made to the attached drawings that constitute a part of the present invention. The attached drawings show, by way of example, specific embodiments that can implement the present invention. The illustrative embodiments are not intended to be exhaustive of all embodiments according to the present invention. It will be appreciated that other embodiments may be utilized, and structural or logical modifications may be made without departing from the scope of the present invention. Therefore, the following specific description is not restrictive, and the scope of the present invention is defined by the attached claims.

[0027] Based on the understanding of the prior art, the inventor of the utility model innovatively thought of setting a decoupling structure on the radiating arm so that the interference current coupled by the newly set decoupling structure and the interference current coupled by the radiating structure can roughly cancel each other, achieve high-frequency suppression on the radiating arm of the low-frequency oscillator, effectively improve the radiation performance of the high-frequency radiating oscillator, and achieve the purpose of decoupling. In abstract terms, the utility model proposes a radiating oscillator, the radiating oscillator comprising: a radiating structure, the radiating structure is used to radiate signals and includes a radiating arm; and a first decoupling structure, the first decoupling structure is arranged at the radiating arm and includes a first branch and a second branch, and the longitudinal axis of the first branch intersects with the longitudinal axis of the second branch. A first decoupling structure is set in the radiating oscillator according to the utility model, so that the interference current coupled by the newly set decoupling structure and the interference current coupled by the radiating structure can roughly cancel each other, achieve high-frequency suppression on the radiating arm of the low-frequency oscillator, effectively improve the radiation performance of the high-frequency radiating oscillator, and achieve the purpose of decoupling. In this way, the low-frequency radiating oscillator can, for example, maximize the reduction of interference with it by other radiating oscillators, such as high-frequency radiating oscillators. On the one hand, this improves the radiation performance of the radiating oscillator according to the utility model, and on the other hand, it also reduces its interference with other radiating oscillators, thereby improving the radiation performance of other radiating oscillators used with it.

[0028] The following describes the radiation oscillator and the corresponding base station antenna according to the present invention with reference to the accompanying drawings. Figure 1 FIG. 1 shows a top view of a radiation vibrator 100 disclosed according to an embodiment of the utility model. Figure 2 A three-dimensional diagram of a radiation vibrator 100 disclosed according to an embodiment of the utility model is shown; Figure 3 A top view of a radiation vibrator 300 disclosed according to another embodiment of the utility model is shown, and Figure 4 shows a stereogram of a radiation vibrator 300 disclosed according to another embodiment of the utility model; and Figure 5 FIG. 4 is a schematic diagram of a multi-band antenna 500 according to an embodiment of the present invention.

[0029] from Figure 1 It can be seen that the radiating element 100 according to the present invention includes radiating structures 110, 120, 130 and 140 and first decoupling structures 111, 112, 113 and 114 associated with the radiating structure 110, a first decoupling structure associated with the radiating structure 120, a first decoupling structure associated with the radiating structure 130 and a first decoupling structure associated with the radiating structure 140. The radiating structures 110, 120, 130 and 140 are used to radiate signals and include a radiating arm 115 and several other radiating arms. The first decoupling structures 111, 112, 113 and 114 are arranged at the radiating arm 115 and include first branches 1111, 1121, 1131 and 1141 and second branches 1112, 1122, 1132 and 1142. The longitudinal axes of the first branches 1111, 1121, 1131 and 1141 and the longitudinal axes of the second branches 1112, 1122, 1132 and 1142 intersect each other and are preferably arranged substantially vertically. For simplicity, only the radiating structure 110 in the upper left corner is shown in detail. In order to further illustrate the positional relationship between the first branch and the second branch, the first branch 1241 and the second branch 1242 are separately marked in the radiating structure 120 in the upper right corner. Figure 1 It can be seen from the radiation structure 120 in the upper right corner that the longitudinal axis of the first branch 1241 and the longitudinal axis of the second branch 1242 intersect with each other, and are preferably arranged substantially vertically.

[0030] Figure 2 FIG. 1 shows a stereoscopic view of a radiation vibrator 100 disclosed according to an embodiment of the present utility model. Figure 2 It can be seen that Figure 2 The radiating element 100 shown may also include, for example, a substrate, Figure 1 The radiation structures 110, 120, 130 and 140 and the first decoupling structures 111, 112, 113 and 114 shown in the figure are arranged on the substrate 150. In addition, the radiation oscillator 100 further includes a balun structure 160, which is configured to feed the radiation structures 110, 120, 130 and 140. Figure 1 and Figure 2 As shown, the longitudinal axis of the first branch 1241 and the longitudinal axis of the second branch 1242 intersect each other, and are preferably substantially vertically arranged, and the first decoupling structure formed by the first branch 1241 and the second branch 1242 is constructed in a T-shaped structural appearance. Figure 1For the radiating oscillator 100, the radiating oscillator 100 includes four radiating arms, wherein four first decoupling structures 111, 112, 113 and 114 are provided in association with each radiating arm (e.g., the radiating arm 115 in the upper left corner), and the four first decoupling structures 111, 112, 113 and 114 are provided at the four corners of the associated radiating arm 115. In addition, the first branches 1111, 1121, 1131 and 1141 and the second branches 1112, 1122, 1132 and 1142 are constructed as cantilevers extending from the body of the radiating arm 115 into the radiating arm 115, that is, one end is provided on the radiating arm 115, and the other end is suspended. In addition, the first decoupling structures 111, 112, 113 and 114 are provided at the bend of the radiating arm 115. Furthermore, from Figure 1 and Figure 2 It can be seen that the lengths of the first branches 1111, 1121, 1131 and 1141 and the second branches 1112, 1122, 1132 and 1142 are different, and the widths of the first branches 1111, 1121, 1131 and 1141 and the second branches 1112, 1122, 1132 and 1142 are also different.

[0031] In addition, from Figure 1 and Figure 2 It can be seen that the radiating element 100 shown therein can be implemented as a plate-shaped dipole low-frequency radiating element 100 , for example.

[0032] Figure 3 and Figure 4 Another possible form of the radiating element 300 is shown. Figure 3It can be seen that the radiating element 300 according to the present invention includes radiating structures 310, 320, 330 and 340 and first decoupling structures 311, 312, 313 and 314 associated with the radiating structure 310, a first decoupling structure associated with the radiating structure 320, a first decoupling structure associated with the radiating structure 330 and a first decoupling structure associated with the radiating structure 340. The radiating structures 310, 320, 330 and 340 are used to radiate signals and include a radiating arm 315 and several other radiating arms. The first decoupling structures 311, 312, 313 and 314 are arranged at the radiation arm 315 and include first branches 3111, 3121, 3131 and 3141 and second branches 3112, 3122, 3132 and 3142. The longitudinal axes of the first branches 3111, 3121, 3131 and 3141 and the longitudinal axes of the second branches 3112, 3122, 3132 and 3142 intersect with each other and are preferably arranged substantially vertically. For simplicity, only the radiation structure 310 in the upper left corner is shown in detail. In order to further illustrate the positional relationship between the first branch and the second branch, the first branch 3441 and the second branch 3442 are separately identified in the radiation structure 340 in the lower right corner. Figure 3 It can be seen from the radiation structure 340 in the lower right corner that the longitudinal axis of the first branch 3441 and the longitudinal axis of the second branch 3442 intersect with each other and are preferably arranged substantially vertically.

[0033] Furthermore, with Figure 1 Differently, Figure 3 The radiating element 300 shown can be implemented as a cross-dipole low-frequency radiating element 300, for example. Figure 3 The decoupling structures 310, 320, 330 and 340 of the radiating element 300 shown in the figure further include second decoupling structures 317 and 316, which are respectively arranged between two adjacent first decoupling structures. Specifically, the second decoupling structure 317 is arranged between two adjacent first decoupling structures 311 and 312, and the second decoupling structure 316 is arranged between two adjacent first decoupling structures 313 and 314. Furthermore, each second decoupling structure also includes two mutually intersecting and preferably mutually perpendicular branches, so as to further offset the interference current coupled by the radiating arm.

[0034] Figure 4 FIG. 2 shows a stereogram of a radiation vibrator 300 disclosed according to an embodiment of the present utility model. Figure 4 It can be seen that Figure 4 The radiation oscillator 300 shown may also include, for example, a substrate. Figure 3The radiation structures 310, 320, 330 and 340 and the first decoupling structures 311, 312, 313 and 314 shown in the figure are arranged on the substrate 350. In addition, the radiation oscillator 300 further includes a balun structure 360, which is configured to feed the radiation structures 310, 320, 330 and 340. Figure 3 and Figure 4 As shown, the longitudinal axis of the first branch 3441 and the longitudinal axis of the second branch 3442 intersect each other, preferably substantially vertically arranged, and the first decoupling structure formed by the longitudinal axis of the first branch 3441 and the second branch 3442 is constructed in a T-shaped structural appearance. In addition, the second decoupling structure is also constructed in a T-shaped structural appearance. For example Figure 3 For the radiation oscillator 300, the radiation oscillator 300 includes four radiation arms, wherein four first decoupling structures 311, 312, 313 and 314 are provided in association with each radiation arm (e.g., the radiation arm 315 in the upper left corner), and the four first decoupling structures 311, 312, 313 and 314 are provided at the four corners of the associated radiation arm 315. In addition, the first branches 3111, 3121, 3131 and 3141 and the second branches 3112, 3122, 3132 and 3142 are constructed as cantilevers extending from the body of the radiation arm 315 into the radiation arm 315, that is, one end is provided on the radiation arm 315, and the other end is suspended. In addition, the first decoupling structures 311, 312, 313 and 314 are provided at the bend of the radiation arm 315. Furthermore, from Figure 3 and Figure 4 It can be seen that the lengths of the first branches 3111, 3121, 3131 and 3141 and the second branches 3112, 3122, 3132 and 3142 are different, and the widths of the first branches 3111, 3121, 3131 and 3141 and the second branches 3112, 3122, 3132 and 3142 are also different.

[0035] In addition, the second aspect of the present invention proposes a low-frequency radiating antenna, which includes the radiating element 100 or 300 proposed according to the first aspect of the present invention. Preferably, in one embodiment of the present invention, the low-frequency radiating antenna is constructed as a plate-shaped dipole low-frequency radiating antenna or a cross-type dipole low-frequency radiating antenna. A first decoupling structure is provided in the low-frequency radiating antenna according to the present invention, so that the interference current coupled by the newly arranged decoupling structure and the interference current coupled by the radiating structure can roughly offset each other, realize high-frequency suppression on the radiating arm of the low-frequency element, effectively improve the radiation performance of the high-frequency radiating element, and achieve the purpose of decoupling. In this way, the low-frequency radiating element can, for example, maximize the reduction of interference from other radiating elements, such as high-frequency radiating elements, which on the one hand improves the radiation performance of the radiating element according to the present invention, and on the other hand reduces its interference with other radiating elements, thereby improving the radiation performance of other radiating elements used therewith.

[0036] Furthermore, the third aspect of the utility model proposes a multi-band antenna, the multi-band antenna comprising: a low-frequency radiating antenna, the low-frequency radiating antenna being constructed as the low-frequency radiating antenna proposed in the second aspect of the utility model; and a high-frequency radiating antenna, the operating frequency of the high-frequency radiating antenna being higher than the operating frequency of the low-frequency radiating antenna. Additionally, in one embodiment of the utility model, the multi-band antenna further comprises a reflector, wherein the low-frequency radiating antenna and the high-frequency radiating antenna are arranged on the same side of the reflector. A first decoupling structure is provided in the multi-band antenna according to the utility model, so that the interference current coupled by the newly arranged decoupling structure and the interference current coupled by the radiating structure can roughly offset each other, realize high-frequency suppression on the radiating arm of the low-frequency oscillator, effectively improve the radiation performance of the high-frequency radiating oscillator, and achieve the purpose of decoupling. In this way, the low-frequency radiating oscillator can, for example, maximize the reduction of interference from other radiating oscillators, such as high-frequency radiating oscillators, which on the one hand improves the radiation performance of the radiating oscillator according to the utility model, and on the other hand reduces its interference to other radiating oscillators, thereby improving the radiation performance of other radiating oscillators used therewith.

[0037] The following combination Figure 5 To describe the specific structure of the multi-band antenna according to the utility model, wherein: Figure 5 FIG. 5 is a schematic diagram of a multi-band antenna 500 according to an embodiment of the present invention. Figure 5It can be seen that the multi-band antenna 500 according to the present invention includes a low-frequency radiation oscillator 570 and a high-frequency radiation oscillator 580. Specifically, in the multi-band antenna of the related art, for example, including a high-frequency radiation oscillator 580 and a low-frequency radiation oscillator 570, the radiation signal of the high-frequency radiation oscillator 580 will be coupled to the low-frequency radiation oscillator 570. The high-frequency signal coupled to the low-frequency radiation oscillator 570 will interfere with the radiation signal of the high-frequency radiation oscillator 580 itself, thereby destroying the radiation effect of the high-frequency radiation oscillator 580. Therefore, it is necessary to add the following to the low-frequency radiation oscillator 570: Figure 1 or Figure 3 The T-type decoupling structure shown is used to offset the interference current formed by the high-frequency signal coupled to the low-frequency radiation oscillator 570, so as to improve the performance of the high-frequency radiation oscillator 580. At this time, according to the utility model, the low-frequency radiation oscillator 570 includes the features of the T-type decoupling structure in the above-mentioned embodiment. The interference current formed by the coupling of the T-type decoupling structure of the low-frequency radiation oscillator 570 and the interference current formed by the coupling of the radiation structure can offset each other or at least can reduce each other, so as to achieve high-frequency suppression on the low-frequency radiation oscillator 100 or 300, effectively improve the radiation performance of the high-frequency radiation oscillator, and achieve the purpose of decoupling. In summary, in one embodiment of the utility model, the multi-band antenna includes: a low-frequency radiation antenna, which is constructed as the low-frequency radiation antenna proposed in the second aspect of the utility model; and a high-frequency radiation antenna, the operating frequency of which is higher than the operating frequency of the low-frequency radiation antenna. A first decoupling structure is provided in the multi-band antenna according to the utility model, so that the interference current coupled by the newly provided decoupling structure and the interference current coupled by the radiation structure can roughly cancel each other out, realize high-frequency suppression on the radiation arm of the low-frequency radiator, effectively improve the radiation performance of the high-frequency radiation radiator, and achieve the purpose of decoupling. In this way, the low-frequency radiation radiator can, for example, maximize the reduction of interference with other radiation radiators, such as high-frequency radiation radiators, which on the one hand improves the radiation performance of the radiation radiator according to the utility model, and on the other hand reduces its interference with other radiation radiators, thereby improving the radiation performance of other radiation radiators used with it.

[0038] exist Figure 5In the illustrated embodiment, the longitudinal axes of the low-frequency radiating element 570 intersect with each other and are preferably substantially vertically arranged. The interference current coupled by the decoupling structure formed by the first branch and the second branch can substantially offset the interference current coupled by the radiating structure, thereby achieving high-frequency suppression on the radiating arm of the low-frequency radiator, effectively improving the radiation performance of the high-frequency radiating element, and achieving the purpose of decoupling. In this way, the multi-band antenna 500 can, for example, maximize the reduction of interference from other radiating elements, such as high-frequency radiating elements, which, on the one hand, improves the radiation performance of the radiating element according to the utility model, and on the other hand, reduces its interference with other radiating elements, thereby improving the radiation performance of other radiating elements used therewith.

[0039] Although different exemplary embodiments of the utility model have been described, it is obvious to those skilled in the art that different changes and modifications can be made, which can achieve one or some of the advantages of the utility model without departing from the spirit and scope of the utility model. For those skilled in the art, other components that perform the same function can be appropriately replaced. It should be understood that the features explained with reference to specific figures can be combined with the features of other figures, even in those cases where this is not explicitly mentioned. In addition, the method of the utility model can be implemented in a software implementation using all appropriate processor instructions or in a hybrid implementation using a combination of hardware logic and software logic to obtain the same result. Such modifications to the scheme according to the utility model are intended to be covered by the appended claims.

Claims

1. A radiation oscillator, characterized in that: The radiation vibrator comprises: a radiating structure for radiating a signal and comprising a radiating arm; and A first decoupling structure is provided at the radiation arm and includes a first branch and a second branch, wherein a longitudinal axis of the first branch intersects a longitudinal axis of the second branch.

2. The radiation vibrator according to claim 1, characterized in that: The first branch and the second branch are configured as cantilevers extending from the radiation arm body into the radiation arm.

3. The radiation vibrator according to claim 1 or 2, characterized in that: The first decoupling structure is arranged at a bend of the radiation arm.

4. The radiation vibrator according to claim 3, characterized in that: The decoupling structure further includes a second decoupling structure, which is disposed between two adjacent first decoupling structures.

5. The radiation vibrator according to any one of claims 1 to 4, characterized in that: The first decoupling structure is configured in a T-shape.

6. The radiation vibrator according to any one of claims 1 to 5, characterized in that: The radiating element comprises four radiating arms, wherein four first decoupling structures are arranged in association with each radiating arm, and the four first decoupling structures are arranged at four corners of the associated radiating arm.

7. The radiation vibrator according to any one of claims 1 to 6, characterized in that: The radiation element further includes a substrate, and the radiation structure and the first decoupling structure are arranged on the substrate.

8. The radiation vibrator according to any one of claims 1 to 7, characterized in that: The radiating element further includes a balun structure, and the balun structure is configured to feed the radiating structure.

9. The radiation vibrator according to any one of claims 1 to 8, characterized in that: The first branch section and the second branch section have different lengths.

10. The radiation vibrator according to any one of claims 1 to 9, characterized in that: The first branch node and the second branch node have different widths.

11. The radiation vibrator according to claim 1, characterized in that: The longitudinal axis of the first branch section and the longitudinal axis of the second branch section are perpendicular to each other.

12. A low frequency radiation antenna, characterized in that: The low-frequency radiation antenna comprises a radiation element according to any one of claims 1 to 11.

13. The low-frequency radiation antenna according to claim 12, characterized in that: The low frequency radiation antenna is configured as a plate-shaped dipole low frequency radiation antenna or a cross-shaped dipole low frequency radiation antenna.

14. A multi-band antenna, characterized in that: The multi-band antenna comprises: A low-frequency radiating antenna, the low-frequency radiating antenna being constructed as the low-frequency radiating antenna according to claim 11 or 12; and A high frequency radiation antenna, wherein the operating frequency of the high frequency radiation antenna is higher than the operating frequency of the low frequency radiation antenna.

15. The multi-band antenna according to claim 14, characterized in that: The multi-band antenna further includes a reflector, wherein the low-frequency radiating antenna and the high-frequency radiating antenna are disposed on the same side of the reflector.

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