A dual-polarized broadband base station antenna radiating element

Abstract

This utility model discloses a dual-polarized broadband base station antenna radiating unit, belonging to the field of broadband antenna technology. The dual-polarized broadband base station antenna radiating unit includes a metal reflector, a feed support, a radiator, and a feed conductor. The radiator includes four vibrating arms, each with a slot on its top surface and a trapezoidal slot on an adjacent side. The feed support has multiple mounting holes on its top surface, and the feed conductor is located inside these holes. A dielectric gasket is fixed to the outside of the feed conductor. This utility model is an integrated radiating unit, featuring high installation stability and good consistency in mass production. Its excellent cross-cutting ratio and port isolation characteristics, along with its 1700-2700MHz broadband characteristics, effectively address the current demand for broadband base station antennas, solving the problem that the relative bandwidth is still insufficient to meet the needs of existing ultra-wideband antennas.

Description

Technical Field

[0001] This utility model belongs to the field of broadband antenna technology, and more specifically, it relates to a dual-polarized broadband base station antenna radiating unit. Background Technology

[0002] With the rapid advancement of science and technology, the new generation of LTE technology has emerged and continues to advance with the development of communication technology. Mobile communication has entered people's lives and plays an important role. The development of new-generation technology has led to an increasing demand for antennas that can be shared across multiple systems, which poses higher challenges and requirements for broadband antennas. The existing publication number CN202178382U describes a broadband dual-polarized low-isolation die-cast radiating element, which uses a radiating element vibrator arm short-circuit bar and two mutually orthogonal symmetrical vibrators connected in sequence in a die-cast integrated structure. It can be widely used in communication systems such as WCDMA, PCS, and GSM, but its relative bandwidth is still not wide enough to meet the needs of existing ultra-wideband antennas. Therefore, a dual-polarized broadband base station antenna radiating element is proposed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a dual-polarized broadband base station antenna radiating element. Its excellent cross-cutting ratio and port isolation characteristics, as well as its 1700-2700MHz broadband characteristics, can effectively solve the current demand for broadband base station antennas, thereby addressing the problem mentioned in the background that the relative bandwidth is still not wide enough to meet the needs of existing ultra-wideband antennas.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dual-polarized broadband base station antenna radiating unit, comprising a metal reflector, a feed support, a radiator, and a feed conductor. The radiator includes four vibrating arms, each with a slot on its top surface and a trapezoidal slot on one adjacent side. The feed support has multiple mounting holes on its top surface, the feed conductor is located inside the mounting holes, and a dielectric gasket is fixed to the outside of the feed conductor. The feed support has multiple grooves on its outer surface, and a dielectric fixing block is provided inside the grooves. A dielectric spacer is provided between the feed support and the metal reflector. The bottom surface of the feed support has two connecting ends, and multiple welding grooves are provided at the lower ends of the two connecting ends. A coaxial cable is welded to the inside of the welding grooves.

[0005] As a preferred embodiment of this utility model, the power supply support is fixed to the top surface of the metal reflector by screws, and the radiator is electrically connected to the power supply support.

[0006] As a preferred embodiment of this utility model, the four oscillator arms are centrally symmetrical, the four oscillator arms are polarized at ±45 degrees, and the four oscillator arms are located on the same plane.

[0007] As a preferred embodiment of this invention, the distance between the four vibrating arms and the reflector is one-quarter of a wavelength.

[0008] As a preferred technical solution of this utility model, the radiator and the power supply support are integrally formed.

[0009] As a preferred embodiment of this utility model, the medium gasket abuts against the inner side of the mounting hole.

[0010] As a preferred embodiment of this utility model, the lower ends of both connecting ends extend downwards through the top surface of the metal reflector.

[0011] This utility model provides a dual-polarized broadband base station antenna radiating element, which has the following beneficial effects:

[0012] This invention relates to a dual-polarized broadband base station antenna radiating unit, which is an integrated radiating unit with high installation stability and good consistency in mass production. Its excellent cross-connection ratio and port isolation characteristics, as well as its 1700-2700MHz broadband characteristics, can effectively solve the current demand for broadband base station antennas and address the problem that the relative bandwidth is still not wide enough to meet the needs of existing ultra-wideband antennas.

[0013] 2. The polygonal cavity formed by the hollowed-out slots and trapezoidal hollowed-out gaps of this dual-polarized broadband base station antenna radiating element can effectively change the current distribution on the vibrator arm, making the impedance change of the dual-polarized broadband base station antenna radiating element smoother and reducing the weight of the vibrator arm, thus reducing costs. At the same time, the trapezoidal hollowed-out gaps between the vibrator arms cause the mutual coupling between the vibrator arms to gradually change with the trapezoidal spacing. This gradual change effect cancels out the effect of the impedance change of the radiating element with frequency, thereby slowing down the impedance change of the radiating element and enabling it to complete matching over a wider frequency range, achieving the purpose of widening the bandwidth of the vibrator. Attached Figure Description

[0014] Figure 1 This is a top view of the radiating element of a dual-polarized broadband base station antenna according to this utility model.

[0015] Figure 2 This is a bottom-view structural diagram of a dual-polarized broadband base station antenna radiating unit according to the present invention.

[0016] Figure 3 This is a schematic diagram showing the disassembled structure of a dual-polarized broadband base station antenna radiating unit according to the present invention.

[0017] Figure 4 This utility model relates to a dual-polarized broadband base station antenna radiating element. Figure 3 Enlarged diagram of point A in the diagram.

[0018] In the diagram: 1. Metal reflector; 2. Power supply support base; 3. Radiator; 31. Vibrator arm; 32. Hollowed-out groove; 33. Trapezoidal hollowed-out gap; 4. Power supply conductor; 5. Coaxial cable; 6. Mounting hole; 7. Dielectric gasket; 8. Groove; 9. Dielectric fixing block; 10. Dielectric spacer; 11. Connecting end; 12. Welding groove. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figures 1 to 4This utility model provides a technical solution: a dual-polarized broadband base station antenna radiating unit, including a metal reflector 1, a feed support 2, a radiator 3, and a feed conductor 4. The radiator 3 includes four vibrating arms 31, each with a hollowed-out groove 32 on its top surface and a trapezoidal hollowed-out slit 33 on an adjacent side. The feed support 2 has multiple mounting holes 6 on its top surface, and the feed conductor 4 is located inside the mounting holes 6. A dielectric gasket 7 is fixed to the outside of the feed conductor 4. The feed support 2 has multiple grooves 8 on its outer side, and a dielectric fixing block 9 is provided inside the grooves 8. A dielectric spacer 10 is provided between the feed support 2 and the metal reflector 1. The bottom surface is provided with two connecting ends 11, and the lower ends of the two connecting ends 11 are also provided with multiple welding grooves 12. The inner side of the welding grooves 12 is welded with a coaxial cable 5. The power supply support 2 is fixed to the top surface of the metal reflector 1 by screws. The radiator 3 is electrically connected to the power supply support 2. The four vibrating arms 31 are centrally symmetrical. The four vibrating arms 31 are polarized at ±45 degrees. The four vibrating arms 31 are located on the same plane. The distance between the four vibrating arms 31 and the reflector 1 is one-quarter of a wavelength. The radiator 3 and the power supply support 2 are integrally formed. The dielectric gasket 7 abuts against the inner side of the mounting hole 6. The lower ends of the two connecting ends 11 extend through the top surface of the metal reflector 1 to the bottom.

[0023] Before use, the feed support 2 is fixed to the metal reflector 1 with screws, and a dielectric spacer 10 is placed between them to prevent direct contact between the feed support 2 and the metal reflector 1. Then, the coaxial cable 5 is fixed to the welding groove 12 on the connecting end 11 by welding. Finally, the feed conductor 4 is placed in the mounting hole 6 on the feed support 2, and the feed support 2 is fixed by the dielectric fixing block 9. Simultaneously, the feed conductor 4 is prevented from direct contact with the feed support 2 by the dielectric gasket 7. During use, the polygonal cavity formed by the hollowed-out groove 32 and the trapezoidal hollowed-out gap 33 effectively changes the current distribution on the vibrator arm 31, making the impedance change of the dual-polarized broadband base station antenna radiating element smoother and reducing the weight of the vibrator arm 31, thus lowering the cost. Furthermore, the trapezoidal hollowed-out gaps 33 between the vibrator arms 31 cause the mutual coupling between the vibrator arms 31 to gradually change with the trapezoidal spacing, and this gradual change… The variable effect cancels out the effect of the impedance change of the radiating element with frequency, thereby slowing down the change in the impedance of the radiating element and enabling it to achieve matching over a wider frequency range, thus widening the bandwidth of the vibrator. Through the mutual coupling between the feed conductor 4 and the feed support 2, the coaxial cable 5 is converted from unbalanced feed to balanced feed, thereby providing balanced feed to the radiator 3. The radiator 3 and the feed support 2 are integrally formed, which enhances the stability and consistency of the dual-polarized broadband base station antenna radiating element. This invention is an integrated radiating element with high installation stability and good consistency in mass production. Its good cross-cutting ratio and port isolation characteristics, as well as its 1700-2700MHz broadband characteristics, can effectively solve the current demand for broadband base station antennas and solve the problem that the relative bandwidth is still not wide enough to meet the needs of existing ultra-wideband antennas.

[0024] The specific usage and function of this embodiment: Before use, the power supply support 2 is fixed to the metal reflector 1 with screws, and a dielectric spacer 10 is placed between them so that the power supply support 2 does not directly contact the power supply support 2. Then, the coaxial cable 5 is fixed to the welding groove 12 on the connecting end 11 by welding. Finally, the power supply conductor 4 is placed in the mounting hole 6 on the power supply support 2, and the power supply support 2 is fixed by the dielectric fixing block 9. At the same time, the power supply conductor 4 does not directly contact the power supply support 2 through the dielectric gasket 7.

[0025] In use, the polygonal cavity formed by the hollowed-out slot 32 and the trapezoidal hollowed-out gap 33 can effectively change the current distribution on the vibrator arm 31, making the impedance change of the dual-polarized broadband base station antenna radiating element smoother, and reducing the weight of the vibrator arm 31 and reducing costs. At the same time, the trapezoidal hollowed-out gap 33 between the vibrator arms 31 makes the mutual coupling between the vibrator arms 31 gradually change with the trapezoidal spacing, and this gradual change effect cancels out the effect of the impedance change of the radiating element with frequency, thereby slowing down the change of the impedance of the radiating element, enabling it to complete matching in a wider frequency range, and achieving the purpose of widening the bandwidth of the vibrator.

[0026] The mutual coupling between the feed conductor 4 and the feed support 2 enables the conversion of the coaxial cable 5 from unbalanced feed to balanced feed, thereby providing balanced feed to the radiator 3. The radiator 3 and the feed support 2 are integrally formed, which enhances the stability and consistency of the dual-polarized broadband base station antenna radiating element.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dual-polarized broadband base station antenna radiating element, comprising a metal reflector (1), a feed support (2), a radiator (3), and a feed conductor (4), characterized in that: The radiator (3) includes four vibrating arms (31), each of the four vibrating arms (31) has a hollowed-out groove (32) on its top surface, and each of the four vibrating arms (31) has a trapezoidal hollowed-out slit (33) on one side of each adjacent side. The top surface of the power supply support (2) has multiple mounting holes (6), the power supply conductor (4) is located inside the mounting holes (6), the outside of the power supply conductor (4) is fixed with a dielectric gasket (7), the outside of the power supply support (2) has multiple grooves (8), the inside of the grooves (8) has a dielectric fixing block (9), the power supply support (2) and the metal reflector (1) have a dielectric spacer (10), the bottom surface of the power supply support (2) has two connecting ends (11), the lower ends of the two connecting ends (11) also have multiple welding grooves (12), and the inside of the welding grooves (12) is welded with a coaxial cable (5).

2. The dual-polarized broadband base station antenna radiating element according to claim 1, characterized in that: The power supply support base (2) is fixed to the top surface of the metal reflector (1) by screws, and the radiator (3) is electrically connected to the power supply support base (2).

3. The dual-polarized broadband base station antenna radiating element according to claim 1, characterized in that: The four oscillator arms (31) are centrally symmetrical, and the four oscillator arms (31) are polarized at ±45 degrees. The four oscillator arms (31) are located in the same plane.

4. The dual-polarized broadband base station antenna radiating element according to claim 1, characterized in that: The distance between the four said oscillator arms (31) and the reflector (1) is one-quarter of a wavelength.

5. The dual-polarized broadband base station antenna radiating element according to claim 1, characterized in that: The radiator (3) and the power supply support (2) are integrally formed.

6. The dual-polarized broadband base station antenna radiating element according to claim 1, characterized in that: The medium gasket (7) abuts against the inside of the mounting hole (6).

7. The dual-polarized broadband base station antenna radiating element according to claim 1, characterized in that: The lower ends of both of the connecting ends (11) extend through the top surface of the metal reflector (1) to the bottom.

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