Phase shifter grounding structure, phase shifter and base station antenna

Abstract

The invention discloses a phase shifter grounding structure, and the structure comprises a cavity which is internally used for installing a phase shift circuit, and one side of the cavity is provided with a plurality of first welding parts which are arranged in the length direction of the cavity; a second welding part is arranged on one side of each welding seat, and the welding seats are welded to the corresponding first welding parts through the second welding parts; wherein the cavity and the welding seat are manufactured by a pultrusion process, and an electroplated layer is further formed on the surface of the welding seat. The invention further discloses a phase shifter and a base station antenna which adopt the phase shifter grounding structure. The manufacturing cost of the phase shifter grounding structure is reduced.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a phase shifter grounding structure, a phase shifter, and a base station antenna. Background Technology

[0002] With the rapid development of mobile communication services and the growth of the population, users are demanding increasing capacity and higher communication quality from base stations, thus requiring wider coverage areas. As a crucial component of communication systems, the cost of base station antennas significantly impacts the overall cost of the base station. Therefore, developing low-cost, high-performance base station antennas has become the main theme of future base station antenna technology evolution and industrial development. Cavity phase shifters, due to their superior performance, are currently one of the main technologies for base station antennas and a core component. Therefore, developing low-cost cavity phase shifters is an essential way to reduce the cost of base station antennas.

[0003] Existing cavity phase shifters are generally formed by pultruding aluminum alloy profiles followed by machining or by integral sheet metal stamping. While integral sheet metal stamping is simple, requires no mold, allows for direct prototyping, and offers quick response, it results in poor cavity precision and intermodulation performance. Pultrusion followed by machining, on the other hand, offers higher cavity dimensional accuracy and stable, reliable performance, making it the primary application method. However, because the outer conductor of the coaxial cable needs to be welded to the cavity for grounding and shielding, the cavity requires a layer of electroplatable tin film or other material at the weld joint. Current mainstream methods include overall cavity electroplating, which is costly; or partial electroplating to cover areas that don't need plating, but due to varying cavity shapes and dimensions, tooling investment is significant, sometimes exceeding the cost of overall electroplating; or partial coating, which requires no tooling and only coats the areas requiring welding, but the coating quality is inferior to electroplating, easily leading to poor welding and affecting phase shifter performance. Therefore, a low-cost phase shifter grounding structure is needed to solve these problems. Summary of the Invention

[0004] To achieve the above objectives, one aspect of the present invention provides a phase shifter grounding structure, which includes:

[0005] A cavity, inside which a phase-shifting circuit is installed, and a plurality of first welding parts are provided on one side of the cavity along the length of the cavity;

[0006] Multiple welding seats, each welding seat has a second welding part on one side, and the welding seat is welded to the corresponding first welding part through the second welding part;

[0007] The cavity and welding seat are made by pultrusion molding, and the surface of the welding seat is also coated with an electroplating layer.

[0008] Furthermore, each first welding part includes two first welding feet disposed opposite to each other along the thickness direction of the cavity, and each second welding part includes two second welding feet corresponding to the two first welding feet, wherein the first welding feet are welded to the corresponding second welding feet.

[0009] Furthermore, two parallel welding grooves are provided on the other side of each welding seat. The welding grooves are formed along the length of the cavity. The welding grooves are provided with a first wire hole, and the cavity is provided with a second wire hole opposite to the first wire hole. The welding grooves are used for welding cables.

[0010] Another aspect of the present invention provides a phase shifter comprising the phase shifter grounding structure as described above.

[0011] Another aspect of the present invention provides a base station antenna that includes the phase shifter described above.

[0012] Compared with related technologies, the phase shifter grounding structure of the present invention has a pultruded cavity and several pultruded electroplated welding seats. Both parts use the same pultruded profile and machining method, which is simple to process and can use the same aluminum alloy material. Compared with other processing methods and material selection such as sheet metal stamping or die casting, it is more reliable in terms of intermodulation and electrical performance consistency and stability.

[0013] Secondly, the technical solution of the present invention does not require the direct formation of a welding groove on the cavity. Instead, the welding groove is formed independently on the welding seat, which reduces the processing cost of the cavity and also reduces the weight and material cost of the cavity.

[0014] In addition, the welding seat is made of pultruded profile, which is simple and convenient to process. Compared with screw connection or other connection methods, the connection between the cavity and the welding seat by welding is more stable and reliable in terms of intermodulation and grounding performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the phase shifter grounding structure according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 Exploded view of the grounding structure of the phase shifter.

[0017] Explanation of icon numbers:

[0018] Cavity 100; First welding foot 110; Second wire hole 120; Welding seat 200; Second welding foot 210; Welding groove 220; First wire hole 230.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, top, bottom, side, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0023] Furthermore, the descriptions involving "first," "second," etc., in the embodiments of the present invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0024] To address the technical deficiencies in related technologies, this embodiment provides a base station antenna that includes a phase shifter. For example... Figure 1 and Figure 2 As shown, the phase shifter grounding structure includes a cavity 100 and multiple welding seats 200. The cavity 100 is used to install the phase shifting circuit, and a plurality of first welding parts are arranged along the length of the cavity 100 on one side. Each welding seat 200 has a second welding part on one side, and the welding seat 200 is welded to the corresponding first welding part through the second welding part. Specifically, the cavity 100 and the welding seats 200 are manufactured by pultrusion molding, and an electroplated layer is also formed on the surface of the welding seat 200.

[0025] Furthermore, each first welding portion includes two first welding feet 110 disposed opposite to each other along the thickness direction of the cavity 100. Each second welding portion includes two second welding feet 210 corresponding to the two first welding feet 110, and the first welding feet 110 are welded to the corresponding second welding feet 210.

[0026] Furthermore, on the other side of each welding seat 200, two parallel welding grooves 220 are formed along the length of the cavity 100. The welding grooves 220 are provided with a first wire hole 230, and the cavity 100 is provided with a second wire hole 120 opposite to the first wire hole 230. The welding grooves 220 are used for welding cables.

[0027] The phase shifter grounding structure of this embodiment has a pultruded cavity and several pultruded electroplated welding seats. Both parts use the same pultruded profile and machining method, which is simple to process and can use the same aluminum alloy material. Compared with other processing methods and material selection such as sheet metal stamping or die casting, it is more reliable in terms of intermodulation and electrical performance consistency and stability.

[0028] Furthermore, the welding groove does not need to be directly formed on the cavity; instead, it is formed independently on the welding seat, reducing the processing cost of the cavity, as well as its weight and material costs. In addition, the welding seat is made of pultruded profile, which is simple and convenient to process. Compared with screw connections or other connection methods, connecting the cavity and the welding seat by welding provides more stable and reliable intermodulation and grounding performance.

[0029] The above description is only a part or preferred embodiment of the present invention. Neither the text nor the drawings should limit the scope of protection of the present invention. All equivalent structural transformations made using the content of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A phase shifter grounding structure, characterized in that, include: A cavity for mounting a phase-shifting circuit, and a plurality of first welding parts arranged along the length of the cavity are provided on one side of the cavity; Multiple welding seats, each welding seat having a second welding part on one side, the welding seat being welded to a corresponding first welding part through the second welding part; The cavity and the welding seat are made by pultrusion molding, and the surface of the welding seat is also formed with an electroplated layer.

2. The phase shifter grounding structure according to claim 1, characterized in that, Each of the first welding portions includes two first welding feet disposed opposite to each other along the thickness direction of the cavity, and each of the second welding portions includes two second welding feet corresponding to the two first welding feet, wherein the first welding feet are welded to the corresponding second welding feet.

3. The phase shifter grounding structure according to claim 1, characterized in that, On the other side of each of the welding seats, there are two parallel welding grooves. The welding grooves are formed along the length of the cavity. The welding grooves have a first wire hole, and the cavity has a second wire hole opposite to the first wire hole. The welding grooves are used for welding cables.

4. A phase shifter, characterized in that, Includes the phase shifter grounding structure as described in any one of claims 1 to 3.

5. A base station antenna, characterized in that, Includes the phase shifter as described in claim 4.

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