Broadband radiation unit

Abstract

The invention provides a broadband radiation unit. The broadband radiation unit comprises a substrate, a radiation line, a balun supporting seat and a base, the surface of the substrate is electroplated with a radiation circuit, and the middle part of the substrate is recessed to form a slot for fixing the Balun supporting seat; the radiation line comprises a resonant ring, a plurality of oscillator arms and a plurality of radiation rings; the resonant ring is arranged along the edge of the substrate, the oscillator arms are arranged in an array by taking the slot as a center, and each oscillator arm is electrically connected with the balun supporting seat; each radiation ring is located in the corresponding oscillator arm, and a coupling gap exists between each radiation ring and the oscillator arm. And the base is electrically connected with the substrate through the balun supporting seat so as to supply power to the radiation line. According to the invention, the oscillator arms are coupled through the resonant rings, and the annular coupling gaps are formed between the radiation rings and the corresponding oscillator arms, so that the impedance bandwidth is optimized, and high-performance signals are output under the condition of light weight.

Description

Technical Field

[0001] The invention belongs to the technical field of base station antennas, and in particular relates to a broadband radiation unit. Background Art

[0002] As mobile communication technology continues to develop rapidly, the performance requirements for base station antennas in the communications field are increasing. In order to meet the emerging communication standards and users' demand for faster and more stable communication services, more and more frequency bands are gradually integrated into base station antennas. Although the integration of such frequency bands greatly improves the communication function of the antenna and enables it to adapt to a variety of communication scenarios, it also brings a problem that cannot be ignored: the weight of the antenna has increased significantly.

[0003] As the number of integrated frequency bands increases, the internal structure of the antenna becomes more complex, and it needs to accommodate more electronic components, circuits, and corresponding radiation components. While these new components and structures improve antenna performance, they also inevitably lead to an increase in the overall weight of the antenna. Overweight antennas not only bring greater difficulties and safety risks to workers during installation and maintenance, but may also impose additional burdens on the overall structure of the base station, affecting the stability and service life of the base station. In this context, the lightweight design of the next generation of base station antennas has become a crucial consideration in the communications field. Summary of the invention

[0004] In order to solve the problem of how to achieve lightweight base station antennas while ensuring performance as described in the background technology, the present invention proposes the following technical solutions:

[0005] A broadband radiation unit comprises: a substrate, a radiation line, and a balun support seat; the radiation line is electroplated on the surface of the substrate, and the middle part of the substrate is recessed to form a slot for fixing the balun support seat; the radiation line comprises: a resonant ring, a plurality of dipole arms, and a plurality of radiation circles; the resonant ring is arranged along the edge of the substrate, and the dipole arms are arranged in an array with the slot as the center; each of the radiation circles is respectively located in the corresponding dipole arm, and a coupling gap exists between each of the radiation circles and the dipole arm; the balun support seat comprises a first part and a second part which are vertically connected; the first part is embedded in the slot, and the first part is electrically connected to each of the dipole arms; the second part is connected to a feeder to supply power to the radiation line.

[0006] The inner protrusion of the resonant ring forms a plurality of first dividing lines and second dividing lines, and the connecting lines between the first dividing lines and the connecting lines between the second dividing lines are perpendicular to each other, so as to divide the substrate surface into a plurality of radiation areas.

[0007] Furthermore, the slot and the first dividing line are connected on a colinear line, and each of the dipole arms is located in one of the radiation areas.

[0008] Furthermore, the width of the annular coupling gap is 0.5 mm.

[0009] Further, a height difference between the substrate and the second portion is 0.2λ-0.3λ.

[0010] Furthermore, the aperture of the substrate is 0.35λ.

[0011] Furthermore, a feeding network is provided on the surface of the balun support seat, input ends of the feeding network are respectively connected to feeder lines, and output ends of the feeding network are respectively electrically connected to one side of each of the vibrator arms.

[0012] Beneficial effect: The present invention couples each vibrator arm through a resonant ring, and a ring-shaped coupling gap is formed between each radiation circle and the corresponding vibrator arm, thereby optimizing the impedance bandwidth, thereby outputting a high-performance signal in a lightweight manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of a broadband radiation unit according to an embodiment of the present invention;

[0014] Figure 2 is a schematic diagram of a top view of a substrate according to an embodiment of the present invention;

[0015] Figure 3 A schematic diagram of return loss according to an embodiment of the present invention;

[0016] Figure 4 Schematic diagram of isolation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present application clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0019] Figure 12 is a schematic diagram of the structure of a broadband radiation unit according to an embodiment of the present invention. 3 is a schematic diagram of the top view of the structure of a substrate according to an embodiment of the present invention.

[0020] Reference Figure 1 According to an embodiment of the present invention, a broadband radiation unit comprises: a substrate 1, a radiation line 2, and a balun support seat 3. The substrate 1 is in the shape of a plate as a whole, and the radiation line 2 is generated on its surface by electroplating to construct a radiation network for signal processing. The middle part of the substrate 1 is recessed to form a slot 11 for fixing the balun support seat 3, and the balun support seat 3 is vertically fixed to the substrate 1 through the slot 11. Figure 2 , the radiation line 2 includes: a resonant ring 21, a plurality of dipole arms 22 and a plurality of radiation circles 23. Among them, the resonant ring 21 is used to adjust the frequency and the radiation signal, and the resonant ring 21 is arranged along the edge of the substrate 1. Each dipole arm 22 is arranged in an array with the slot 11 as the center to ensure the uniformity of signal radiation in all directions. Each dipole arm 22 is electrically connected to the balun support seat 3, and a radiation circle 23 is respectively arranged inside each dipole arm 22, and a coupling gap 5 exists between each radiation circle 23 and the dipole arm 22 where it is located. The balun base 3 includes a first part 31 and a second part 32 connected vertically, the first part 31 is electrically connected to each dipole arm 22, and the second part 32 is connected to the feeder, and a stable current input is provided to the dipole arm 22 through the balun support seat 3, so that the dipole arm 22 effectively generates electromagnetic radiation, thereby driving the entire radiation line 2 to generate an electromagnetic radiation signal. In this embodiment, the first part 31 and the second part 32 are both made of plastic material, and the first part 31 and the second part 32 are formed integrally.

[0021] Continue to refer to Figure 1 Specifically, there is a certain height difference between the substrate 1 and the second part 32. In the present embodiment, the height difference is 0.2λ or 0.3λ. In other embodiments, the height difference is precisely controlled within the range of 0.2λ-0.3λ. By changing the height difference between the substrate 1 and the second part 32, the electric field and magnetic field distribution of the radiation unit can be optimized, and the radiation efficiency and signal strength can be improved. At the same time, the aperture of the substrate 1 is 0.35λ, so as to ensure that the entire broadband radiation unit has good spatial adaptability and radiation directivity while meeting a specific operating frequency range.

[0022] Figure 3 is a schematic diagram of return loss according to an embodiment of the present invention, Figure 4 Schematic diagram of isolation according to an embodiment of the present invention.

[0023] Refer to Figure 3 and Figure 4, further, in order to promote the electromagnetic coupling between the radiation ring 23 and the vibrator arm 22, so as to realize the signal radiation of a wider frequency band. In this embodiment, the coupling slot 5 is annular as a whole, and the width of the coupling slot 5 is 0.5mm. Among them, in the range of 1700MHz-2700MHz, the isolation is less than 24dB, which can meet the isolation requirements of the array formed after the broadband radiation units are arrayed. In the range of 1700MHz-2700MHz, the return loss is less than -15dB, and the matching is good.

[0024] Continue to refer to Figure 2 Furthermore, the inner protrusion of the resonant ring 21 forms a plurality of first and second dividing lines 212. The lines between the first dividing lines 211 and the lines between the second dividing lines 212 are perpendicular to each other, thereby dividing the surface of the substrate 1 into a plurality of radiation areas. Each radiation area is provided with a vibrator arm 22, which optimizes the signal radiation characteristics of the entire radiation unit, so that the radiation lines 2 in different areas can work effectively within their respective frequency bands, thereby broadening the working frequency range of the entire radiation unit.

[0025] Continue to refer to Figure 2 Furthermore, the connection line between the slot 11 and the first dividing line 211 is colinear to enhance the structural rationality of the entire broadband radiation unit and the coordination of signal radiation. Each dipole arm 22 is located in a radiation area respectively. Such a layout enables each dipole arm 22 to function in an independent radiation area, avoiding signal interference between different dipole arms 22, and improving the working efficiency and signal quality of the broadband radiation unit.

[0026] Continue to refer to Figure 1 Specifically, a feed network 4 is disposed on the surface of the balun support seat 3, and the feed network 4 extends along the surfaces of the first portion 31 and the second portion 32, respectively. The input ends of the feed network 4 are respectively connected to the feed lines, and the signals from the external signal source are received through the feed lines. The output ends of the feed network 4 are respectively electrically connected to one side of each dipole arm 22, so as to distribute the input signal to each dipole arm 22 according to a specific ratio and phase.

[0027] In summary, the present invention couples the dipole arms through a resonant ring, and forms an annular coupling gap between each radiation circle and the corresponding dipole arm, thereby optimizing the impedance bandwidth, thereby outputting a high-performance signal in a lightweight manner.

[0028] The foregoing describes certain embodiments of the invention. Other embodiments are within the scope of the following claims.

[0029] The terms "exemplary," "example," and the like used throughout this specification mean "used as an example, instance, or illustration" and do not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0030] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0031] The above description of the contents of this specification is provided to enable any person of ordinary skill in the art to implement or use the contents of this specification. Various modifications to the contents of this specification will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the contents of this specification. Therefore, the contents of this specification are not limited to the examples and designs described herein, but are consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A broadband radiation unit, characterized in that: include: A substrate (1), a radiation line (2), and a balun support seat (3); the radiation line (2) is electroplated on the surface of the substrate (1), and the middle of the substrate (1) is recessed to form a slot (11) for fixing the balun support seat (3); the radiation line (2) comprises: a resonant ring (21), a plurality of vibrator arms (22), and a plurality of radiation rings (23); The resonant ring (21) is arranged along the edge of the substrate (1), and the dipole arms (22) are arranged in an array with the slot (11) as the center; each of the radiation circles (23) is located in the corresponding dipole arm (22), and a coupling gap (5) exists between each of the radiation circles (23) and the dipole arm (22); the balun support seat (3) comprises a first part (31) and a second part (32) vertically connected; the first part (31) is embedded in the slot (11), and the first part (31) is electrically connected to each of the dipole arms (22); the second part (32) is connected to a feeder to supply power to the radiation line (2).

2. A broadband radiation unit according to claim 1, characterized in that: The inner protrusion of the resonant ring (21) forms a plurality of first dividing lines (211) and second dividing lines (212), and the connecting lines between the first dividing lines (211) and the connecting lines between the second dividing lines (212) are perpendicular to each other, so as to divide the surface of the substrate (1) into a plurality of radiation areas.

3. A broadband radiation unit according to claim 2, characterized in that: The connection line between the slot (11) and the first dividing line (211) is collinear, and each of the vibrator arms (22) is located in one of the radiation areas.

4. A broadband radiation unit according to claim 3, characterized in that: The width of the annular coupling gap (5) is 0.5 mm.

5. A broadband radiation unit according to claim 4, characterized in that: The height difference between the substrate (1) and the second portion (32) is 0.2λ-0.3λ.

6. A broadband radiation unit according to claim 4, characterized in that: The aperture of the substrate (1) is 0.35λ.

7. A broadband radiation unit according to claim 6, characterized in that: A feeding network (4) is provided on the surface of the balun support seat (3), the input ends of the feeding network (4) are respectively connected to the feed lines, and the output ends of the feeding network (4) are respectively electrically connected to one side of each of the vibrator arms (22).

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