A cavity coupler

Abstract

This application discloses a cavity coupler, including a cavity, a connector, a load resistor, and a main conductor and a coupling conductor disposed within the cavity. At least one of the main conductor and the coupling conductor is a welding conductor, and a pre-positioning welding transition structure is formed at its end. This structure includes a main welding platform, a pre-positioning support structure protruding from the main welding platform, an intermittent venting and solder-containing channel formed by adjacent bottom support portions, a solder-containing thinning area lower than the main welding platform, and a conductive transition portion connecting the main welding platform and the conductor body area. Due to the above structure, the center conductor or connecting lead can obtain support and positioning references from the bottom support portion and the lateral limiting portion, effectively solving the problems of unstable alignment, lateral offset, or inconsistent overlap positions before welding, and improving the stability of the welding connection position and the welding transition structure.

Description

Technical Field

[0001] This invention relates to the field of radio frequency passive device technology, and specifically to a cavity coupler. Background Technology

[0002] Cavity couplers are a common type of passive radio frequency (RF) device, typically used in RF signal transmission systems for directional coupling, power detection, or signal sampling of the main transmitted signal. With increasing demands for miniaturization, bandwidth, and consistency in communication equipment, the assembly precision, welding stability, and geometric consistency of the conductive transition region within the cavity coupler's internal conductor structure significantly impact the device's port matching, isolation, directivity, and bandwidth stability.

[0003] Existing cavity couplers typically include a metal cavity, an input connector, an output connector, and a coupling connector disposed within the metal cavity, a main conductor and a coupling conductor disposed within the metal cavity, a load resistor disposed within the metal cavity, and a support assembly for defining the relative positions of the main conductor and the coupling conductor. The two ends of the main conductor are typically soldered to the center conductors of the input and output connectors, respectively. One end of the coupling conductor is typically soldered to the center conductor of the coupling connector, and the other end of the coupling conductor is typically soldered to the connection lead of the load resistor, thereby forming a radio frequency signal transmission and coupling path within the metal cavity.

[0004] However, in the existing structures described above, the end positions of the main conductor and coupling conductor are usually defined by the bracket assembly, the slot in the cavity, or the mounting reference in the cavity, while the position of the connector center conductor or the load resistor connection lead is usually defined by the connector mounting structure or the load resistor mounting structure. There are assembly deviations between the two types of positioning references, which can lead to lateral offsets or inconsistent overlap positions between the center conductor or connection lead and the corresponding conductor end before welding, affecting the stability of the welding connection position between the conductor end and the center conductor or connection lead. Summary of the Invention

[0005] To address the problem of lateral offset or inconsistent overlap between the center conductor or connecting lead and the corresponding conductor end before welding in existing technologies, this application provides a cavity coupler. A pre-positioning welding transition structure is formed at the conductor end of at least one of the main body and the coupling conductor. This pre-positioning welding transition structure includes a main welding platform, a pre-positioning support structure protruding from the main welding platform, an intermittent venting and solder-containing channel formed between adjacent bottom supports, a solder-containing thinning area lower than the main welding platform, and a conductive transition portion connecting the main welding platform and the conductor body area. This allows the connector's center conductor or load resistor connecting lead to achieve structural positioning through the bottom support and lateral limiting portion before welding to the conductor end, and forms a structural space in the welding area for solder containment and gas exhaust, thereby improving the stability of the welding connection position between the conductor end and the center conductor or connecting lead.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A cavity coupler, comprising: cavity; A connector is disposed in the cavity, the connector having a center conductor; A load resistor is disposed in the cavity, and the load resistor has connecting leads; Both the main body and the coupling conductor are disposed in the cavity. At least one of the main body and the coupling conductor is a welding conductor. The welding conductor includes a conductor body region and a conductor end connected to the conductor body region. The conductor end is welded to the center conductor or the connecting lead. Wherein, at least one end of the conductor is formed with a prepositioned welding transition structure, the prepositioned welding transition structure comprising: The main welding platform is formed on the side of the conductor end facing the center conductor or the connecting lead; A prepositioning support structure is provided on the main soldering table. The prepositioning support structure includes multiple bottom support portions and lateral limiting portions. The multiple bottom support portions are spaced apart along the extension direction of the center conductor or the connecting lead to form an interval venting and solder-containing channel between two adjacent bottom support portions. The lateral limiting portions are located to the side of the bottom support portions in the width direction. A tin-thinning zone is formed on at least one side of the main soldering platform in the width direction, and the tin-thinning zone is lower than the main soldering platform. At least a portion of the spaced venting tin-thinning channels are connected to the tin-thinning zone along the width direction of the main soldering platform. A conductive transition section connects the main welding platform and the conductor body region of the welding conductor.

[0007] In one embodiment, the lateral limiting portion includes a first lateral limiting portion and a second lateral limiting portion. The first lateral limiting portion and the second lateral limiting portion are respectively located on both sides of the width direction of the plurality of bottom support portions. The relative inner surfaces of the first lateral limiting portion and the second lateral limiting portion constitute a lateral limiting surface for limiting the lateral displacement of the center conductor or the connecting lead.

[0008] In one implementation, the first lateral limiting part is a reference limiting part, and the second lateral limiting part is an avoidance limiting part; with the support center line defined by the plurality of bottom supporting parts as a reference, the distance between the lateral limiting surface of the avoidance limiting part and the support center line is greater than the distance between the lateral limiting surface of the reference limiting part and the support center line, thereby forming an avoidance space on the avoidance limiting part side for accommodating assembly deviations.

[0009] In one embodiment, the top of the bottom support is an arc-shaped support surface, a sloping support surface, or a narrow ridge support surface, so that the bottom support forms line contact or partial contact with the center conductor or the connecting lead.

[0010] In one embodiment, the tin-reducing area includes a first tin-reducing area and a second tin-reducing area, wherein the first tin-reducing area and the second tin-reducing area are located on both sides of the width direction of the main soldering platform; The first tin-reducing region and the second tin-reducing region are symmetrically arranged about the extended center line of the central conductor or the connecting lead; The first tin-reducing area and the second tin-reducing area are respectively provided with tin-stopping edges on their outer sides.

[0011] In one embodiment, a flow channel is formed at the end of the conductor, and the flow channel connects the spaced exhaust tin-containing channel and the tin-containing thinning region.

[0012] In one embodiment, the conductor end has a solder-reducing region on at least one side of the center groove, the solder-reducing region being configured to accommodate solder; the conductor end has a flow channel connecting the center groove and the solder-reducing region.

[0013] In one embodiment, the conductive transition portion is a stepped conductive transition portion, which includes at least two steps arranged sequentially along the direction from the main welding platform toward the conductor body region of the welding conductor. The width of the stage near the conductor body region is greater than the width of the stage near the main welding platform; The adjacent two stage sections are connected by a sloped transition section or a circular arc transition section.

[0014] In one embodiment, the main body and the coupling conductor are mounted in the cavity via a support assembly configured to define the relative positions of the main body and the coupling conductor.

[0015] In one embodiment, the stepped conductive transition portion is disposed at the conductor end of the coupling conductor; at least one conductor end of the coupling conductor has a bending transition region, and the stepped conductive transition portion is located between the main welding platform and the bending transition region.

[0016] In one embodiment, the main welding table surface is provided with a tapered guide inlet at one end along the extension direction of the central conductor or the connecting lead; The spacing between opposite sides of the inner wall of the tapering guide inlet gradually decreases along the direction closer to the prepositioning support structure.

[0017] In one embodiment, at least one of the connector and the load resistor is mounted to the cavity via an adjustable mounting structure; The adjustable mounting structure includes an elongated hole, an enlarged diameter hole, a sliding groove, or a fine-tuning groove. The connector or the load resistor is mounted to the cavity via fasteners that pass through the adjustable mounting structure.

[0018] Beneficial effects: By employing a technique that forms a pre-positioning welding transition structure at the end of at least one of the main conductor and the coupling conductor, and that this pre-positioning welding transition structure includes a main welding platform, a pre-positioning support structure protruding from the main welding platform, an intermittent venting and solder-containing channel formed between adjacent bottom supports, a solder-containing thinning area lower than the main welding platform, and a conductive transition portion connecting the main welding platform and the conductor body area, the center conductor or connecting lead can obtain a support reference along its extension direction from multiple bottom supports and a width-direction limiting reference from the lateral limiting portion when welding to the conductor end. This effectively solves the problem in the prior art where the conductor end and the connector center conductor or load resistor connecting lead belong to different positioning references, resulting in unstable alignment, lateral offset, or inconsistent overlapping positions before welding. At the same time, the intermittent venting and solder-containing channel is connected to the solder-containing thinning area, providing a structural space for solder to be contained and gas to be discharged in the welding area. The conductive transition portion can connect the main welding platform and the conductor body area, thereby improving the stability of the welding connection position and welding transition structure between the conductor end and the center conductor or connecting lead. Attached Figure Description

[0019] Figure 1 A schematic diagram of the internal structure of a cavity coupler according to an embodiment of this application is shown; Figure 2A schematic diagram of the conductor end structure according to an embodiment of this application is shown. Figure 1 ; Figure 3 A schematic diagram of the conductor end structure according to an embodiment of this application is shown. Figure 2 ; Figure 4 It shows Figure 3 Cross-sectional view at point AA.

[0020] Figure 5 It shows Figure 3 Cross-sectional view at point BB.

[0021] Among them, 1. cavity; 2. connector; 210. center conductor; 3. load resistor; 4. main body; 5. coupling conductor; 510. bending transition area; 6. conductor end; 610. main welding table; 620. pre-positioning support structure; 621. bottom support part; 622. lateral limiting part; 630. interval exhaust solder channel; 640. solder thinning area; 641. solder stop edge; 650. conductive transition part; 651. stage; 660. tapered guide inlet; 670. guide groove; 7. adjustable mounting structure. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] Example 1:

[0025] Please refer to Figures 1 to 5This embodiment proposes a cavity coupler, including a cavity 1, a connector 2, a load resistor 3, a main conductor 4, and a coupling conductor 5. The connector 2 is disposed within the cavity 1 and has a center conductor 210; the load resistor 3 is disposed within the cavity 1 and has connecting leads; the main conductor 4 and the coupling conductor 5 are both disposed within the cavity 1, and at least one of the main conductor 4 and the coupling conductor 5 is a welded conductor. The welded conductor includes a conductor body region and a conductor end 6 connected to the conductor body region, and the conductor end 6 is welded to the center conductor 210 or the connecting leads.

[0026] At least one of the conductor ends 6 is provided with a pre-positioning solder transition structure, which includes a main soldering platform 610, a pre-positioning support structure 620, an intermittent venting and solder-retaining channel 630, a solder-retaining thinning region 640, and a conductive transition portion 650. The main soldering platform 610 is formed on the side of the conductor end 6 facing the center conductor 210 or the connecting lead. The pre-positioning support structure 620 protrudes from the main soldering platform 610 and includes multiple bottom support portions 621 and lateral limiting portions 622. The multiple bottom support portions 621 extend along the center conductor 210 or the connecting lead. The lead wires are spaced apart in their extension directions to form a spaced venting and solder-containing channel 630 between two adjacent bottom support portions 621. The lateral limiting portion 622 is located to the side of the bottom support portion 621 in the width direction. A solder-containing thinning region 640 is formed on at least one side of the main soldering table 610 in the width direction, and the solder-containing thinning region 640 is lower than the main soldering table 610. At least a portion of the spaced venting and solder-containing channel 630 communicates with the solder-containing thinning region 640 along the width direction of the main soldering table 610. A conductive transition portion 650 connects the main soldering table 610 and the conductor body region of the solder conductor.

[0027] This embodiment proposes a cavity coupler 1, which can be applied in a radio frequency signal transmission system for coupling, sampling, or power detection of the main transmission signal. The cavity coupler 1 includes a cavity 1, a connector 2, a load resistor 3, a main conductor 4, and a coupling conductor 5. The cavity 1 can be a metal cavity 1, with an internal space for accommodating the main conductor 4 and the coupling conductor 5. The connector 2 is disposed within the cavity 1 and has a center conductor 210. The load resistor 3 is disposed within the cavity 1 and has connecting leads. Both the main conductor 4 and the coupling conductor 5 are disposed within the cavity 1 and serve as conductive transmission structures within the cavity coupler 1.

[0028] At least one of the main conductor 4 and the coupling conductor 5 is a welding conductor. The welding conductor includes a conductor body region and a conductor end 6 connected to the conductor body region. The conductor body region forms the main conductive path inside the coupler in cavity 1, and the conductor end 6 is used for welding connection to the center conductor 210 of connector 2 or the connection lead of load resistor 3. That is, the welding conductor can be either the main conductor 4 or the coupling conductor 5; the conductor end 6 can be used to connect to the center conductor 210 of connector 2 or to the connection lead of load resistor 3. Through the above connection relationships, connector 2, main conductor 4, coupling conductor 5, and load resistor 3 can form corresponding radio frequency transmission and coupling connection paths within cavity 1.

[0029] At least one conductor end 6 has a pre-positioned welding transition structure. This pre-positioned welding transition structure is a local structure formed on the conductor end 6, used to provide a structured overlap, support, restraint, solder containment, and conductive transition base for the welding connection between the center conductor 210 or connecting lead and the conductor end 6. The pre-positioned welding transition structure includes a main welding platform 610, a pre-positioned support structure 620, an intermittent venting solder containment channel 630, a solder thinning area 640, and a conductive transition portion 650. The main welding platform 610 is formed on the side of the conductor end 6 facing the center conductor 210 or connecting lead, and the center conductor 210 or connecting lead is located on the side where the main welding platform 610 is located during welding, thereby making the main welding platform 610 the base bearing surface of the welding area.

[0030] A pre-positioning support structure 620 protrudes from the main welding table surface 610. The pre-positioning support structure 620 includes multiple bottom support portions 621 and lateral limiting portions 622. The multiple bottom support portions 621 are spaced apart along the extension direction of the center conductor 210 or connecting lead, and are used to support the center conductor 210 or connecting lead, ensuring that the center conductor 210 or connecting lead maintains a predetermined overlap height relative to the main welding table surface 610. The lateral limiting portions 622 are located to the side of the bottom support portions 621 in the width direction, and are used to limit the offset of the center conductor 210 or connecting lead relative to the conductor end 6 in the width direction. Thus, the bottom support portions 621 and the lateral limiting portions 622 together form a pre-positioning structure for the center conductor 210 or connecting lead, ensuring that the center conductor 210 or connecting lead is stably positioned in the predetermined welding area of ​​the conductor end 6 before welding.

[0031] An intermittent venting and solder-containing channel 630 is formed between two adjacent bottom support portions 621. Since the multiple bottom support portions 621 are spaced apart along the extension direction of the center conductor 210 or connecting lead, adjacent bottom support portions 621 are not in continuous solid contact, but rather form an intermittent area for solder entry and gas exit. This intermittent venting and solder-containing channel 630 corresponds to the lower area of ​​the center conductor 210 or connecting lead, allowing solder to enter the local space between the center conductor 210 or connecting lead and the main soldering table 610 during soldering, and allowing air or flux volatiles to exit through this intermittent venting and solder-containing channel 630, thereby reducing insufficient solder filling caused by localized blockage.

[0032] A solder thinning region 640 is formed on at least one side of the main soldering platform 610 in the width direction, and the solder thinning region 640 is lower than the main soldering platform 610. At least partially spaced venting solder channels 630 communicate with the solder thinning region 640 along the width direction of the main soldering platform 610. Thus, the solder thinning region 640 can serve as a low-lying receiving area on the side of the main soldering platform 610 to receive solder flowing in from the spaced venting solder channels 630 or overflowing from the side of the main soldering platform 610. Because the solder thinning region 640 is lower than the main soldering platform 610, the solder can form a controllable distribution between the main soldering platform 610 and the solder thinning region 640, reducing the possibility of solder accumulating above the center conductor 210 or the connecting leads.

[0033] A conductive transition portion 650 connects the main welding platform 610 and the conductor body region of the welding conductor. As a connection area between the main welding platform 610 and the conductor body region, the conductive transition portion 650 allows the welding connection area of ​​the center conductor 210 or connecting lead to transition from the main welding platform 610 to the conductor body region. The conductive transition portion 650 can be integrally formed with the conductor end 6, or it can be formed by locally machining the conductor end 6. The conductive transition portion 650 establishes a clear structural connection between the welding area and the conductor body region, thereby avoiding the need for the transition between the welding area and the conductor body region to rely solely on irregular solder shapes.

[0034] In this embodiment, during actual assembly, the center conductor 210 of connector 2 or the connecting lead of load resistor 3 is arranged towards the corresponding conductor end 6 and enters the area of ​​the main soldering table 610. The center conductor 210 or connecting lead is supported by multiple bottom support portions 621 and its position in the width direction is limited by lateral limiting portions 622. Subsequently, the center conductor 210 or connecting lead is soldered to the conductor end 6. Solder can form a solder connection at the main soldering table 610 and can enter the lower area of ​​the center conductor 210 or connecting lead through the spaced venting and solder-containing channels 630 between adjacent bottom support portions 621. At the same time, excess solder can enter the solder-containing thinning area 640 connected to the spaced venting and solder-containing channels 630. After soldering, the center conductor 210 or connecting lead forms a fixed conductive connection with the conductor end 6 through solder. The main soldering table 610 and the conductive transition portion 650 together constitute the conductive connection base from the soldering area to the conductor body area.

[0035] In this embodiment, the cavity 1 can be configured as a metal structure with a cover plate, mounting groove, positioning groove, or support, according to the installation requirements of the radio frequency device; the connector 2 can be disposed on the side wall, end wall, or other mounting position of the cavity 1; the load resistor 3 can be disposed at the end of the cavity 1 or in a predetermined mounting area within the cavity 1; the main conductor 4 and the coupling conductor 5 can be disposed within the cavity 1 through a bracket, slot, or other fixing structure. The pre-positioning welding transition structure can be formed on the conductor end 6 of the main conductor 4, or on the conductor end 6 of the coupling conductor 5, or simultaneously formed on multiple conductor ends 6 of the main conductor 4 and the coupling conductor 5. The main welding platform 610, the bottom support 621, the lateral limiting part 622, the tin-reducing area 640, and the conductive transition part 650 can be formed on the conductor end 6 through machining, stamping, die casting, or other methods suitable for conductor structure forming.

[0036] In this embodiment, by employing a pre-positioned welding transition structure formed at the conductor end 6 of the welding conductor, and by including a main welding platform 610, a pre-positioned support structure 620 protruding from the main welding platform 610, an intermittent venting and solder-containing channel 630 formed between adjacent bottom support portions 621, a solder-containing thinning area 640 lower than the main welding platform 610, and a conductive transition portion 650 connecting the main welding platform 610 and the conductor body region, the center conductor 210 or connecting lead can obtain a support base through the bottom support portion 621 when welding to the conductor end 6. The lateral limiting part 622 provides a width-direction limiting reference, effectively solving the problem in the prior art where the conductor end 6 and the center conductor 210 or connecting lead lack a stable welding alignment reference, resulting in lateral offset or inconsistent overlap position before welding. At the same time, the spaced exhaust tin-containing channel 630 and the tin-containing thinning area 640 provide structural space for solder containment and gas discharge, and the conductive transition part 650 enables the main welding table 610 to form a stable connection with the conductor body area, thereby improving the stability of the welding connection position and welding transition structure between the conductor end 6 and the center conductor 210 or connecting lead.

[0037] Example 2:

[0038] Please refer to Figures 4 to 5 Based on the cavity 1 coupler described in Embodiment 1, this embodiment further defines the prepositioning support structure 620. In this embodiment, the lateral limiting portion 622 includes a first lateral limiting portion 622 and a second lateral limiting portion 622, which are respectively located on both sides of the width direction of the plurality of bottom supporting portions 621. The plurality of bottom supporting portions 621 protrude from the main welding platform 610 and are arranged at intervals along the extension direction of the center conductor 210 or the connecting lead; the first lateral limiting portion 622 and the second lateral limiting portion 622 are located on both sides of the bottom supporting portion 621, so that the center conductor 210 or the connecting lead can be simultaneously supported from below and limited laterally after entering the prepositioning support structure 620.

[0039] The first lateral limiting portion 622 and the second lateral limiting portion 622 can be limiting protrusions, limiting ribs, limiting walls, or limiting steps protruding from the main welding table surface 610. The first lateral limiting portion 622 and the second lateral limiting portion 622 can extend continuously along the extension direction of the center conductor 210 or the connecting lead, or they can be spaced apart along the extension direction. The opposing inner surfaces of the first lateral limiting portion 622 and the second lateral limiting portion 622 form lateral limiting surfaces, which are positioned facing the center conductor 210 or the connecting lead to limit the center conductor 210 or the connecting lead from shifting along the width direction of the main welding table surface 610. Thus, the center conductor 210 or the connecting lead can be confined within a predetermined area of ​​the main welding table surface 610 before welding, and is less likely to shift laterally relative to the conductor end 6.

[0040] Multiple bottom support portions 621 are used to support the lower side of the center conductor 210 or connecting lead, and the first lateral limiting portion 622 and the second lateral limiting portion 622 are used to limit the position of the center conductor 210 or connecting lead on both sides. That is, the bottom support portions 621, the first lateral limiting portion 622 and the second lateral limiting portion 622 together enclose an open pre-positioning support area. This pre-positioning support area does not completely cover the center conductor 210 or connecting lead, but while supporting and limiting the center conductor 210 or connecting lead, it still allows for solder entry space and gas exit space around the center conductor 210 or connecting lead. Compared with a simple planar overlap structure, this pre-positioning support structure 620 can provide a more defined overlap position reference before soldering.

[0041] Furthermore, the first lateral limiting part 622 is a reference limiting part, and the second lateral limiting part 622 is a clearance limiting part. When multiple bottom supporting parts 621 are arranged along the extension direction of the center conductor 210 or the connecting lead, the center line of support can be defined by the center position or support position of the multiple bottom supporting parts 621. Based on this support center line, the distance between the lateral limiting surface of the clearance limiting part and the support center line is greater than the distance between the lateral limiting surface of the reference limiting part and the support center line, thereby forming a clearance space on the clearance limiting part side. This clearance space can provide a certain clearance margin for the center conductor 210 or the connecting lead when there is a slight assembly deviation, avoiding the first lateral limiting part 622 and the second lateral limiting part 622 simultaneously forming an excessively tight clamp on the center conductor 210 or the connecting lead.

[0042] During assembly, the center conductor 210 or connecting lead can be positioned close to the reference limiting part, so that one side is restricted by the lateral limiting surface of the reference limiting part; at the same time, the side that avoids the limiting part, due to its larger distance, allows for slight deviations of the center conductor 210 or connecting lead within a limited range. In this way, the pre-positioning support structure 620 can form a stable lateral positioning reference through the reference limiting part, and can also reduce the risk of the center conductor 210 or connecting lead being forcibly bent, squeezed, or subjected to uneven load due to assembly deviations through the avoidance limiting part.

[0043] Furthermore, the top of the bottom support portion 621 can be an arc-shaped support surface, a sloping support surface, or a narrow-ridge support surface. An arc-shaped support surface allows for smoother contact with the cylindrical or near-cylindrical center conductor 210 and connecting leads; a sloping support surface provides guidance for the center conductor 210 or connecting leads during support; and a narrow-ridge support surface reduces the contact area between the bottom support portion 621 and the center conductor 210 or connecting leads. All of these support surface structures reduce the large-area contact between the bottom support portion 621 and the center conductor 210 or connecting leads, ensuring that while the center conductor 210 or connecting leads are supported, space for solder entry and gas exit is still maintained on its underside and periphery.

[0044] In this embodiment, the first lateral limiting portion 622 and the second lateral limiting portion 622 can be integrally formed with the bottom support portion 621 on the main welding table surface 610, or they can be formed by partially processing the conductor end 6. The top shape of the bottom support portion 621 can be selected according to the cross-sectional shape of the center conductor 210 or the connecting lead; when the center conductor 210 or the connecting lead has a circular cross-section, the top of the bottom support portion 621 can adopt an arc-shaped support surface or a narrow ridge support surface; when the center conductor 210 or the connecting lead has a flat side or needs to be guided for correction, the top of the bottom support portion 621 can adopt a sloping support surface. The height of the first lateral limiting portion 622 and the second lateral limiting portion 622 can be higher than the support surface of the bottom support portion 621, or they can cooperate with the support surface of the bottom support portion 621, as long as they can limit the position of the center conductor 210 or the connecting lead in the width direction.

[0045] Before soldering, after the center conductor 210 or connecting lead enters the pre-positioned support area, its lower side is supported by multiple bottom support portions 621, and its width direction position is defined by a first lateral limiting portion 622 and a second lateral limiting portion 622. When using a reference limiting portion and an avoidance limiting portion, the center conductor 210 or connecting lead preferentially relies on the reference limiting portion to determine the lateral reference, while the avoidance limiting portion provides avoidance space for assembly deviations. During soldering, solder can enter the gap area between the center conductor 210 or connecting lead and the main soldering table 610, and can flow through the spaced venting solder channels 630 between adjacent bottom support portions 621, avoiding the closure of the soldering space on the lower side due to the continuous contact of the bottom support portions 621.

[0046] In this embodiment, based on the pre-positioning welding transition structure of Embodiment 1, a first lateral limiting part 622 and a second lateral limiting part 622 respectively located on both sides of the width direction of multiple bottom support parts 621 are further adopted. The multiple bottom support parts 621, the first lateral limiting part 622, and the second lateral limiting part 622 together form a technical means of supporting and laterally limiting the center conductor 210 or connecting lead. Therefore, after the center conductor 210 or connecting lead enters the main welding table 610, it can obtain a clearer pre-positioning reference in the height and width directions, effectively solving the problem of lateral offset or inconsistent overlap positions that easily occur when simply relying on the overlap of the conductor end 6 plane. Furthermore, since the first lateral limiting part 622 is set as... The reference limiting part and the second lateral limiting part 622 are set as avoidance limiting parts, and an avoidance margin is formed on one side of the avoidance limiting part. Therefore, while maintaining the positioning reference on one side, the risk of bending, off-center loading or forced deformation of the center conductor 210 or connecting lead caused by rigid clamping on both sides can be reduced. Furthermore, since the top of the bottom support part 621 adopts an arc support surface, a slope support surface or a narrow ridge support surface, the large-area contact between the bottom support part 621 and the center conductor 210 or connecting lead can be reduced, making it easier for the spaced venting solder channel 630 in Embodiment 1 to maintain communication with the welding area. This facilitates solder entry and gas discharge, and improves the stability of the welding connection position and welding structure between the conductor end 6 and the center conductor 210 or connecting lead.

[0047] Example 3:

[0048] Based on the cavity 1 coupler described in Example 2, this example further defines the tin-thinning region 640 and the current-guiding structure. Please refer to... Figures 2 to 5In this embodiment, the tin-reducing region 640 includes a first tin-reducing region 640 and a second tin-reducing region 640, which are located on both sides of the main soldering platform 610 in the width direction. Both the first and second tin-reducing regions 640 are formed at the conductor end 6 and are both lower than the main soldering platform 610, thus forming low-position tin-reducing regions on both sides of the main soldering platform 610.

[0049] The first solder-thinning area 640 and the second solder-thinning area 640 are symmetrically arranged about the extended center line of the center conductor 210 or the connecting lead. This extended center line can be understood as the predetermined extension direction center line of the center conductor 210 or the connecting lead on the main soldering platform 610, or it can correspond to the support center line defined by the multiple bottom support portions 621. Because the first solder-thinning area 640 and the second solder-thinning area 640 are symmetrically arranged, when solder flows from the main soldering platform 610 to both sides, both sides of the main soldering platform 610 have corresponding solder-thinning spaces, thereby enabling the solder to form a relatively balanced distribution on both sides of the center conductor 210 or the connecting lead.

[0050] Solder-stop edges 641 are respectively provided on the outer sides of the first solder-thinning area 640 and the second solder-thinning area 640. The solder-stop edges 641 are formed on the side of the solder-thinning area 640 away from the main soldering table 610, and are used to limit the outward expansion range of the solder in the width direction of the conductor end 6. The solder-stop edges 641 can be edges, flanges, steps, or guard structures that are higher than the solder-thinning area 640. By providing the solder-stop edges 641, the solder entering the solder-thinning area 640 is less likely to continue to spread disorderly outwards to the conductor end 6, thereby confining the solder within the range defined by the main soldering table 610 and the solder-thinning areas 640 on both sides.

[0051] A flow channel 670 is formed at the conductor end 6, which connects the spaced venting and solder-containing channel 630 and the solder-thinning area 640. The flow channel 670 can be formed between the main soldering platform 610 and the solder-thinning area 640, or it can be formed on the side of the spaced venting and solder-containing channel 630 between adjacent bottom support portions 621. One end of the flow channel 670 is connected to the spaced venting and solder-containing channel 630, and the other end is connected to the first solder-thinning area 640 or the second solder-thinning area 640, so that the solder or gas in the spaced venting and solder-containing channel 630 can enter the solder-thinning area 640 along the width direction of the main soldering platform 610.

[0052] During the soldering process, the center conductor 210 or connecting lead is supported by the bottom support portion 621 in Embodiment 2 and limited by the lateral limiting portion 622. After the solder enters the area between the center conductor 210 or connecting lead and the main soldering table 610, it can flow through the spaced venting and solder-containing channels 630 between adjacent bottom support portions 621. When the amount of solder is large, some solder can flow from the spaced venting and solder-containing channels 630 into the first solder-containing thinning area 640 or the second solder-containing thinning area 640 through the guide groove 670, thereby reducing the possibility of solder continuously accumulating above the center conductor 210 or connecting lead. At the same time, the gas in the spaced venting and solder-containing channels 630 can also be discharged to the side of the solder-containing thinning area 640 through the guide groove 670, making it difficult for local closed spaces to form in the soldering area.

[0053] The first and second solder thinning zones 640 are lower than the main soldering platform 610, thus serving as low-level accommodating spaces on both sides of the main soldering platform 610. After the solder forms the main solder joint on the main soldering platform 610, excess solder can flow to the low-level solder thinning zones 640 on both sides, instead of continuing to accumulate above the center conductor 210 or the connecting leads. Because the first and second solder thinning zones 640 are symmetrically arranged, the solder flow path to both sides is more balanced, which helps to reduce the situation of excessive solder on one side and insufficient solder on the other side.

[0054] In this embodiment, the flow channel 670 can be integrally formed with the conductor end 6, or it can be formed simultaneously with the main welding platform 610, the bottom support portion 621, and the solder thinning area 640. The bottom of the flow channel 670 can be lower than the main welding platform 610, or it can be flush with or gradually transition to the bottom surface of the solder thinning area 640. The extension direction of the flow channel 670 can be arranged along the width direction of the main welding platform 610, or it can be arranged at an angle relative to the width direction of the main welding platform 610, as long as it can achieve the connection between the spaced exhaust solder channel 630 and the solder thinning area 640.

[0055] In this embodiment, the solder-thinning area 640, the solder-stopping edge 641, and the flow channel 670 are not isolated structures, but rather cooperate with the bottom support 621, the lateral limiting part 622, and the spaced venting solder-thinning channel 630 in Embodiment 2. The bottom support 621 in Embodiment 2 creates a lower space between the center conductor 210 or connecting lead and the main soldering platform 610, allowing for solder entry and venting. In this embodiment, the flow channel 670 further connects this lower space to the two sides of the solder-thinning area 640. The two sides of the solder-thinning area 640 are used to accommodate solder flowing out from the spaced venting solder-thinning channel 630; the solder-stopping edge 641 is used to restrict the solder from continuing to diffuse outward. Thus, the solder flow path is jointly defined by the area around the center conductor 210 or connecting lead, the spaced venting solder-thinning channel 630, the flow channel 670, and the solder-thinning area 640.

[0056] In this embodiment, based on the prepositioned support and spaced venting solder-containing channel 630 formed in Embodiment 2, a first solder-containing thinning area 640 and a second solder-containing thinning area 640 located on both sides of the width direction of the main soldering table 610 and lower than the main soldering table 610 are further adopted. A solder-stopping edge 641 is provided on the outside of the first solder-containing thinning area 640 and the second solder-containing thinning area 640. At the same time, the spaced venting solder-containing channel 630 and the solder-containing thinning area 640 are connected by a guide groove 670. Therefore, after the solder enters the area below the center conductor 210 or the connecting lead, it can flow further to the low-position solder-containing area on both sides of the main soldering table 610. This effectively solves the problems of excessive accumulation, disordered lateral diffusion or local stagnation of solder at the main soldering table 610. As a result, the solder flow path is more controllable, the morphology of the soldering area is more stable, and the stability of the soldering connection between the conductor end 6 and the center conductor 210 or the connecting lead is further improved.

[0057] Example 4:

[0058] Based on the cavity 1 coupler described in Embodiment 3, this embodiment further defines the conductive transition portion 650. Please refer to... Figures 2 to 3 In this embodiment, the conductive transition portion 650 is a stepped conductive transition portion 650, which is disposed between the main welding platform 610 and the conductor body region of the welding conductor. The main welding platform 610 is used to receive the welding connection area of ​​the center conductor 210 or connecting leads, and the conductor body region is used to form the main conductive path of the welding conductor. The stepped conductive transition portion 650 is located between the two, which is used to form a progressively transitioning conductive connection structure between the welding area where the main welding platform 610 is located and the conductor body region.

[0059] The stepped conductive transition section 650 includes at least two steps 651 arranged sequentially along the direction from the main welding platform 610 toward the conductor body region of the welded conductor. The step 651 closer to the main welding platform 610 is connected to the main welding platform 610, and the step 651 closer to the conductor body region is connected to the conductor body region. Each step 651 is arranged along the extension direction of the center conductor 210 or the connecting lead, so that after the center conductor 210 or the connecting lead is connected to the main welding platform 610 via solder, it can gradually transition to the conductor body region of the welded conductor through the stepped conductive transition section 650.

[0060] The width of the step 651 near the conductor body region is greater than the width of the step 651 near the main welding platform 610. In other words, the stepped conductive transition section 650 can gradually transition from a relatively narrow step 651 near the main welding platform 610 to a relatively wide step 651 near the conductor body region. Through the aforementioned progressively wider step 651 configuration, the relatively concentrated welding connection area at the main welding platform 610 can gradually expand to the conductor body region, avoiding abrupt transitions from the welding area to a wider conductor body region. This gradual change in width can be configured based on the overall width of the conductor end 6, the overlap position of the center conductor 210 or connecting lead, and the width of the conductor body region.

[0061] Adjacent stage 651 are connected by a sloped transition section or a circular arc transition section. The sloped transition section can be an inclined connecting surface, and the circular arc transition section can be an arc-shaped connecting surface. Connecting adjacent stage 651 through sloped or circular arc transition sections ensures that the connection between adjacent stage 651 is not an abrupt right-angle transition, but rather forms a relatively smooth geometric transition. Thus, the stepped conductive transition section 650 not only has a structure with gradually changing width, but also a gradual connection relationship between adjacent stage 651, forming a continuous conductive transition path between the main welding platform 610, the stepped conductive transition section 650, and the conductor body region.

[0062] In Embodiment 3, the center conductor 210 or connecting lead is prepositioned via the bottom support portion 621 and the lateral limiting portion 622, and the solder forms a relatively controlled flow and containment path via the spaced venting and solder-containing channel 630, the guide groove 670, and the solder-containing thinning region 640. Building upon this, this embodiment further defines the structural morphology of the transition from the soldering area to the conductor body area through a stepped conductive transition portion 650. In other words, Embodiment 3 mainly defines the soldering positioning, venting, and solder-containing structure around the center conductor 210 or connecting lead, while this embodiment further defines the conductive connection transition area behind the soldering area, ensuring a continuous fit between the prepositioning of the conductor end 6, the solder distribution, and the conductive transition.

[0063] Furthermore, a stepped conductive transition portion 650 can be provided at the conductor end 6 of the coupling conductor 5. The conductor end 6 of the coupling conductor 5 can have a bending transition region 510, and the stepped conductive transition portion 650 is located between the main welding platform 610 and the bending transition region 510. At this time, the main welding platform 610 is close to the welding position of the center conductor 210 or the connecting lead, the bending transition region 510 is close to the main extension path of the coupling conductor 5, and the stepped conductive transition portion 650 is located between the two, so that the welding connection area of ​​the center conductor 210 or the connecting lead can gradually transition to the bending transition region 510 of the coupling conductor 5 via the stepped conductive transition portion 650.

[0064] In one alternative embodiment, the stepped conductive transition portion 650 may include a plurality of progressively wider stepped stages 651, each stepped stage 651 being integrally formed with the conductor end 6. Adjacent stepped stages 651 may be connected by a beveled transition portion, or they may be connected by a rounded transition portion. Alternatively, depending on the spatial position of the conductor end 6, some adjacent stepped stages 651 may be connected by a beveled transition portion, while others may be connected by a rounded transition portion. The stepped conductive transition portion 650 may be formed on the conductor end 6 by machining, stamping, die casting, or other methods suitable for forming metal conductors.

[0065] In another alternative embodiment, the stepped conductive transition portion 650 can also be provided at the conductor end 6 of the main body 4, or simultaneously at the conductor end 6 of both the main body 4 and the coupling conductor 5. For structures where the conductor end 6 has a bent transition region 510, a width variation region, or a significant geometric change between the welding region and the conductor body region, the stepped conductive transition portion 650 is preferred. For structures where the conductor end 6 is relatively straight and the transition between the welding region and the conductor body region is relatively simple, a relatively simplified conductive transition portion 650 can also be used. The above different embodiments can be selected according to the specific arrangement of the conductors inside the coupler of the cavity 1.

[0066] After the actual welding connection, the center conductor 210 or connecting lead forms a conductive connection with the main welding platform 610 through solder. The solder forms a relatively stable distribution with the cooperation of the tin-thinning area 640, the flow channel 670, and the spaced exhaust tin-containing channel 630 in Embodiment 3. The main welding platform 610 is then connected to the conductor body area through the stepped conductive transition section 650. Thus, a continuous structural fit is formed between the welding connection position, the solder receiving position, and the conductor body area, reducing the unstable transition caused by structural abruptness between the welding area and the conductor body area.

[0067] In this embodiment, based on the pre-positioned support, spaced venting and solder-containing channel 630, solder-containing thinning area 640 and guide groove 670 formed in embodiment 3, a stepped conductive transition section 650 connecting the main welding platform 610 and the conductor body area is further adopted. The stepped conductive transition section 650 includes stepped stages 651 arranged sequentially along the direction from the main welding platform 610 toward the conductor body area with progressively increasing width. At the same time, adjacent stepped stages 651 are connected by inclined transition sections or arc transition sections. Therefore, while the welding area obtains positioning, venting and solder-containing structural support, it can also form a progressive conductive transition to the conductor body area through the stepped conductive transition section 650. This effectively solves the problem that the conductive transition structure between the welding area and the conductor body area is easily inconsistent due to geometric changes or unstable solder morphology. Thus, it achieves the technical effect of improving the stability of the welding connection structure of the conductor end 6 and the consistency of the conductive transition morphology.

[0068] Example 5:

[0069] Based on the cavity 1 coupler described in Embodiment 4, this embodiment further defines the guide structure of the conductor end 6. Please refer to... Figures 2 to 3 In this embodiment, the main welding platform 610 has a tapered guide inlet 660 at one end along the extension direction of the center conductor 210 or the connecting lead. The tapered guide inlet 660 is formed on the side of the conductor end 6 facing the entry direction of the center conductor 210 or the connecting lead, and is connected to the inlet end of the prepositioning support structure 620, so that the center conductor 210 or the connecting lead can first enter the tapered guide inlet 660, and then enter the prepositioning support area formed by the bottom support portion 621 and the lateral limiting portion 622.

[0070] The tapered guide inlet 660 has opposing guide inner walls, forming a guide space for the center conductor 210 or connecting lead to enter. This guide space is wider at the end furthest from the pre-positioning support structure 620 and narrower at the end closest to it, with the lateral spacing between the guide inner walls gradually decreasing towards the pre-positioning support structure 620. Therefore, when the center conductor 210 or connecting lead has a slight lateral deviation from the preset center position of the main welding table 610 during assembly, the center conductor 210 or connecting lead can first contact the guide inner wall and, guided by the guide inner wall, gradually approach the support centerline of the pre-positioning support structure 620.

[0071] The tapered guide inlet 660 can be integrally formed with the main welding table 610. Specifically, the tapered guide inlet 660 can be obtained by forming an inwardly tapering opening structure on the inlet side of the conductor end 6, the bottom surface of which can be flush with the main welding table 610 or form a smooth transition relative to the main welding table 610. The guide inner wall of the tapered guide inlet 660 can be a slope, an arc surface, or a composite guide surface formed by a combination of slopes and arc surfaces. When a slope is used, the center conductor 210 or connecting lead can gradually move towards the pre-positioning support structure 620 along the sloped guide surface; when an arc surface is used, the contact transition when the center conductor 210 or connecting lead enters is smoother, which helps to reduce hard collisions or local scratches.

[0072] The tapered guide inlet 660 and the pre-positioning support structure 620 can transition continuously. That is, the narrow end of the tapered guide inlet 660 is adjacent to the area where the bottom support portion 621 is located, and the width of the narrow end of the tapered guide inlet 660 can be adapted to the width of the pre-positioning support structure 620 that allows the center conductor 210 or connecting lead to enter. After the center conductor 210 or connecting lead is introduced through the tapered guide inlet 660, its lower side can be further supported by the bottom support portion 621, and its width position can be further limited by the lateral limiting portion 622. Thus, the tapered guide inlet 660 serves as the initial guiding function before entry, and the pre-positioning support structure 620 serves as the supporting and limiting function after entry.

[0073] During assembly, the center conductor 210 of connector 2 or the connecting lead of load resistor 3 moves toward the corresponding conductor end 6. If there is a slight lateral deviation between the center conductor 210 or the connecting lead and the main soldering table 610, the center conductor 210 or the connecting lead can first enter the wider end of the tapered guide inlet 660 and gradually be constrained by the guide inner wall as it moves relative to the main soldering table 610. As the spacing between the guide inner walls gradually decreases in the direction close to the prepositioning support structure 620, the center conductor 210 or the connecting lead is gradually guided to the entrance area of ​​the prepositioning support structure 620, and then supported by the bottom support part 621 and limited in the width direction by the lateral limiting part 622.

[0074] In this embodiment, the tapered guide inlet 660 and the stepped conductive transition portion 650 in Embodiment 4 can be located on different sides of the main welding platform 610. The tapered guide inlet 660 is located at the end where the center conductor 210 or connecting lead enters the main welding platform 610, and the stepped conductive transition portion 650 is located at the end of the main welding platform 610 facing the conductor body region of the welding conductor. Thus, the conductor end 6 forms a structural relationship in which the tapered guide inlet 660, the pre-positioning support structure 620, the main welding platform 610, and the conductive transition portion 650 are sequentially connected along the extension direction of the center conductor 210 or connecting lead. The center conductor 210 or connecting lead is first guided by the tapered guide inlet 660, then supported and limited by the pre-positioning support structure 620, and then the welding connection is completed at the main welding platform 610, and then transitions to the conductor body region through the conductive transition portion 650.

[0075] In this embodiment, the tapered guide inlet 660 can be located at the conductor end 6 for connecting the center conductor 210, or at the conductor end 6 for connecting the load resistor 3 connecting lead. For situations where the center conductor 210 or connecting lead is thin, the assembly space is small, or there is a cumulative assembly deviation between the connector 2, the load resistor 3, and the conductor end 6, the tapered guide inlet 660 can provide a larger initial entry space for the center conductor 210 or connecting lead. The opening width, contraction length, and guide inner wall inclination of the tapered guide inlet 660 can be adapted to the cross-sectional dimensions of the center conductor 210 or connecting lead and the width of the conductor end 6.

[0076] In this embodiment, based on the prepositioning support, spaced venting tin, tin thinning, current guiding, and stepped conductive transition structure formed in Embodiment 4, a tapered guide entrance 660 is further adopted, which is located at one end of the main welding table 610 and whose guide inner wall spacing gradually decreases along the direction close to the prepositioning support structure 620. Therefore, the center conductor 210 or connecting lead can be introduced and preliminarily guided before entering the prepositioning support area formed by the bottom support portion 621 and the lateral limiting portion 622. This effectively solves the problem that the center conductor 210 or connecting lead is difficult to enter the prepositioning support structure 620 smoothly due to initial assembly deviation, and is prone to collision or oblique entry. This achieves the technical effects of improving the smoothness of the center conductor 210 or connecting lead entering the prepositioning support area, reducing the impact of assembly deviation on the welding overlap position, and further improving the welding connection stability between the conductor end 6 and the center conductor 210 or connecting lead.

[0077] Example 6:

[0078] Based on the cavity 1 coupler described in Embodiment 5, this embodiment further defines the mounting structure of the connector 2 and the load resistor 3. In this embodiment, at least one of the connector 2 and the load resistor 3 is mounted to the cavity 1 via an adjustable mounting structure 7. The adjustable mounting structure 7 is used to allow the connector 2 or the load resistor 3 to be positioned relative to the cavity 1 before being fixed to the cavity 1, so that the center conductor 210 of the connector 2 or the connecting lead of the load resistor 3 can better correspond to the pre-positioned welding transition structure on the conductor end 6.

[0079] The adjustable mounting structure 7 includes an elongated hole, an enlarged diameter hole, a groove, or a fine-tuning groove (not shown in the figure). The elongated hole can be a non-circular mounting hole extending in a predetermined direction. After the fastener passes through the elongated hole, the connector 2 or load resistor 3 can be slightly adjusted in the direction of the elongated hole's extension. The enlarged diameter hole can be a mounting hole with a diameter larger than the outer diameter of the fastener, allowing the fastener a certain positional adjustment margin within the enlarged diameter hole. The groove can be a groove-like structure formed on the cavity 1 or the mounting base of the connector 2 or load resistor 3, allowing the connector 2 or load resistor 3 to move along the groove direction. The fine-tuning groove can be a slot structure suitable for small-range position correction, used to meet the precise alignment requirements of the center conductor 210 or connecting lead relative to the conductor end 6.

[0080] Connector 2 or load resistor 3 is mounted to cavity 1 via fasteners that pass through adjustable mounting structure 7. The fasteners can be screws, bolts, or other connectors that allow for detachable fixing. During assembly, the fasteners can first pass through adjustable mounting structure 7 but not fully tighten, keeping connector 2 or load resistor 3 adjustable relative to cavity 1. Subsequently, the position of connector 2 or load resistor 3 is adjusted according to the correspondence between the center conductor 210 or connecting lead and the main welding platform 610, the tapered guide inlet 660, and the pre-positioning support structure 620 on the conductor end 6. When the center conductor 210 or connecting lead can smoothly enter the tapered guide inlet 660 and correspond to the pre-positioning support structure 620, the fasteners are then tightened to fix connector 2 or load resistor 3 to cavity 1.

[0081] In one embodiment, an adjustable mounting structure 7 is disposed between the connector 2 and the cavity 1. The connector 2 is mounted on the side wall, end wall, or other mounting position of the cavity 1, with the center conductor 210 of the connector 2 extending into the cavity 1 and facing the corresponding conductor end 6. By adjusting the position of the connector 2 through the adjustable mounting structure 7, the lateral or axial position of the center conductor 210 relative to the conductor end 6 can be changed, making it easier for the center conductor 210 to enter the tapered guide inlet 660 on the conductor end 6, and further into the pre-positioned support area formed by the bottom support portion 621 and the lateral limiting portion 622.

[0082] In another embodiment, an adjustable mounting structure 7 is disposed between the load resistor 3 and the cavity 1. The load resistor 3 is mounted in a predetermined area of ​​the cavity 1, with its connecting leads facing the corresponding conductor end 6 of the coupling conductor 5 or the main conductor 4. By adjusting the position of the load resistor 3 using the adjustable mounting structure 7, the connecting leads can be positioned in a more suitable overlap relative to the main soldering platform 610, the pre-positioning support structure 620, and the solder thinning area 640 on the conductor end 6, thereby reducing the possibility that the connecting leads may deviate from the pre-positioning support structure 620 due to initial installation deviations.

[0083] In another embodiment, both connector 2 and load resistor 3 can be mounted on cavity 1 via adjustable mounting structure 7. In this case, different connectors 2 or load resistors 3 can be positioned using corresponding elongated holes, expanded diameter holes, sliding grooves, or fine-tuning grooves. The adjustment direction of each adjustable mounting structure 7 can be the same, or it can be set according to the relative positional relationship between the center conductor 210 or connecting lead and the corresponding conductor end 6. For example, for positions where there is mainly lateral deviation, the adjustment direction of the adjustable mounting structure 7 can be set along the width direction of the main welding platform 610; for positions where there is mainly axial overlap length deviation, the adjustment direction of the adjustable mounting structure 7 can be set along the extension direction of the center conductor 210 or connecting lead.

[0084] In Embodiment 5, the conductor end 6 has already guided the center conductor 210 or connecting lead before entry via the tapered guide inlet 660, and supported and limited by the pre-positioning support structure 620. The adjustable mounting structure 7 in this embodiment is adjusted from the mounting position side of the connector 2 or load resistor 3. That is, the tapered guide inlet 660 and the pre-positioning support structure 620 are mainly used to receive and position the center conductor 210 or connecting lead on the conductor end 6 side, while the adjustable mounting structure 7 is mainly used to adjust the initial position of the center conductor 210 or connecting lead on the connector 2 or load resistor 3 side. When combined, these two structures can jointly reduce the impact of assembly reference deviations on the welding overlap position on both the mounting side and the conductor end 6 side.

[0085] In the actual assembly process, the main body 4 and the coupling conductor 5 can be placed in the cavity 1 first, so that the conductor end 6 of the welding conductor is in the predetermined installation position; then the connector 2 or the load resistor 3 is pre-installed in the cavity 1 through the adjustable mounting structure 7, so that the center conductor 210 or the connecting lead faces the corresponding conductor end 6; then the position of the connector 2 or the load resistor 3 is adjusted so that the center conductor 210 or the connecting lead corresponds to the tapered guide inlet 660, the bottom support part 621 and the lateral limiting part 622; after the position is confirmed, the fasteners are tightened to fix the connector 2 or the load resistor 3; finally, the welding connection between the conductor end 6 and the center conductor 210 or the connecting lead is performed. During welding, the center conductor 210 or the connecting lead can be stably placed in the area defined by the predetermined positioning support structure 620, and the solder can further form a relatively controlled flow and containment through the spaced exhaust solder channel 630, the guide groove 670 and the solder thinning area 640.

[0086] In this embodiment, the adjustable mounting structure 7 can be formed in the cavity 1, or on the mounting flange of the connector 2, the mounting base of the load resistor 3, or a fixing member connected to the load resistor 3. The adjustable mounting structure 7 can be set independently or used in conjunction with a positioning boss, positioning groove, gasket, or clamping member. After the fastener is tightened, the position of the connector 2 or the load resistor 3 relative to the cavity 1 is fixed, thereby maintaining a relatively stable positional relationship of the center conductor 210 or the connecting lead during welding and subsequent use.

[0087] In this embodiment, based on the tapered guide inlet 660, pre-positioning support structure 620, spaced exhaust tin-containing channel 630, tin-containing thinning area 640, and conductive transition portion 650 formed in embodiment 5, at least one of the connector 2 and load resistor 3 is further installed in the cavity 1 through an adjustable mounting structure 7 such as an elongated hole, an enlarged diameter hole, a slide groove, or a fine-tuning groove, and fixed by fasteners. Therefore, before the central conductor 210 of the connector 2 or the connecting lead of the load resistor 3 enters the pre-positioning welding transition structure at the conductor end 6, the initial deviation can be reduced by adjusting the installation position. This effectively solves the problem that the central conductor 210 or the connecting lead is difficult to accurately correspond to the pre-positioning support structure 620 due to the deviation between the installation reference of the connector 2 or the load resistor 3 and the position reference of the conductor end 6. This achieves the technical effects of calibrating the installation side position of the central conductor 210 or the connecting lead, smoother introduction and positioning at the conductor end 6, and further improved stability of the welding connection position.

[0088] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cavity coupler, comprising: cavity; A connector is disposed in the cavity, the connector having a center conductor; A load resistor is disposed in the cavity, and the load resistor has connecting leads; Both the main body and the coupling conductor are disposed in the cavity. At least one of the main body and the coupling conductor is a welding conductor. The welding conductor includes a conductor body region and a conductor end connected to the conductor body region. The conductor end is welded to the center conductor or the connecting lead. Wherein, at least one end of the conductor is formed with a prepositioned welding transition structure, the prepositioned welding transition structure comprising: The main welding platform is formed on the side of the conductor end facing the center conductor or the connecting lead; A prepositioning support structure is provided on the main soldering table. The prepositioning support structure includes multiple bottom support portions and lateral limiting portions. The multiple bottom support portions are spaced apart along the extension direction of the center conductor or the connecting lead to form an interval venting and solder-containing channel between two adjacent bottom support portions. The lateral limiting portions are located to the side of the bottom support portions in the width direction. A tin-thinning zone is formed on at least one side of the main soldering platform in the width direction, and the tin-thinning zone is lower than the main soldering platform. At least a portion of the spaced venting tin-thinning channels are connected to the tin-thinning zone along the width direction of the main soldering platform. A conductive transition section connects the main welding platform and the conductor body region of the welding conductor.

2. The cavity coupler according to claim 1, characterized in that, The lateral limiting portion includes a first lateral limiting portion and a second lateral limiting portion. The first lateral limiting portion and the second lateral limiting portion are respectively located on both sides of the width direction of the plurality of bottom support portions. The relative inner surfaces of the first lateral limiting portion and the second lateral limiting portion constitute a lateral limiting surface for limiting the lateral displacement of the center conductor or the connecting lead.

3. The cavity coupler according to claim 2, characterized in that, The first lateral limiting part is a reference limiting part, and the second lateral limiting part is an avoidance limiting part; with the support center line defined by the plurality of bottom supporting parts as a reference, the distance between the lateral limiting surface of the avoidance limiting part and the support center line is greater than the distance between the lateral limiting surface of the reference limiting part and the support center line, thereby forming an avoidance space on the side of the avoidance limiting part to accommodate assembly deviation.

4. The cavity coupler according to any one of claims 1 to 3, characterized in that, The top of the bottom support portion is an arc-shaped support surface, a sloping support surface, or a narrow ridge support surface, so that the bottom support portion forms line contact or partial contact with the center conductor or the connecting lead.

5. The cavity coupler according to claim 1, characterized in that: The tin-thinning area includes a first tin-thinning area and a second tin-thinning area, which are located on both sides of the width direction of the main welding platform, respectively. The first tin-reducing region and the second tin-reducing region are symmetrically arranged about the extended center line of the central conductor or the connecting lead; The first tin-reducing area and the second tin-reducing area are respectively provided with tin-stopping edges on their outer sides.

6. The cavity coupler according to claim 5, characterized in that, A flow guide groove is formed at the end of the conductor, and the flow guide groove connects the spaced exhaust tin-containing channel and the tin-containing thinning area.

7. The cavity coupler according to claim 1, characterized in that: The conductive transition section is a stepped conductive transition section, which includes at least two steps arranged sequentially along the direction from the main welding platform toward the conductor body region of the welding conductor. The width of the stage near the conductor body region is greater than the width of the stage near the main welding platform; The adjacent two stage sections are connected by a sloped transition section or a circular arc transition section.

8. The cavity coupler according to claim 7, characterized in that, The stepped conductive transition portion is disposed at the conductor end of the coupling conductor; at least one conductor end of the coupling conductor has a bending transition region, and the stepped conductive transition portion is located between the main welding table and the bending transition region.

9. The cavity coupler according to claim 1, characterized in that: The main welding table surface is provided with a tapered guide inlet at one end along the extension direction of the central conductor or the connecting lead. The spacing between opposite sides of the inner wall of the tapering guide inlet gradually decreases along the direction closer to the prepositioning support structure.

10. The cavity coupler according to claim 1, characterized in that: At least one of the connector and the load resistor is mounted to the cavity via an adjustable mounting structure; The adjustable mounting structure includes an elongated hole, an enlarged diameter hole, a sliding groove, or a fine-tuning groove. The connector or the load resistor is mounted to the cavity via fasteners that pass through the adjustable mounting structure.

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