Radio frequency connector

Abstract

The invention relates to a radio frequency connector. The radio frequency connector comprises a shell, a connecting part and a positioning part, the shell is provided with a mounting chamber, an annular positioning bulge is arranged on the inner wall of the mounting chamber, and a plurality of convex ribs are arranged on the inner edge of the annular positioning bulge; the connecting part is arranged in the mounting chamber and sequentially comprises a cylindrical central conductor, an insulator and a cylindrical outer conductor from inside to outside; the outer conductor is in interference fit with the annular positioning bulge through the convex rib; the outer wall of the outer conductor is provided with a solid clamping protrusion. The fixing part comprises a tubular wire clamp and a lock catch; the tubular wire clamp is sleeved outside the outer conductor, the side wall of the tubular wire clamp is provided with a clamping groove, and the clamping groove is correspondingly clamped with the solid clamping bulge; the lock catch comprises an extending end used for fixing the tubular wire clamp and the shell; the rear end of the tubular wire clamp is provided with an outward flange, and the flange is fixedly clamped between the extension end and the annular positioning projection. The radio frequency connector can reduce radio frequency signal transmission characteristic impedance and improve radio frequency signal transmission quality.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a radio frequency connector. Background Art

[0002] The vehicle-mounted RF connector is an important component for RF signal transmission and is widely used in automotive communication systems. The vehicle-mounted RF connector consists of an outer conductor, a center conductor, an insulator and other parts. The outer conductor, the center conductor and the insulator are combined and fixedly installed in a plastic housing. The outer conductor and the center conductor are usually made of materials such as brass, phosphor bronze, beryllium copper, etc., and the plating includes tin, nickel, etc. The center conductor is used for RF signal transmission, and the outer conductor serves as a reference layer for RF signal transmission. The consistency of the structure of the outer conductor and the center conductor can affect the characteristic impedance of the connector. The larger the characteristic impedance, the worse the signal transmission quality of the RF connector. The insulator is used to isolate the outer conductor from the center conductor, and the insulator materials include PE, PBT, PA, PP, LCP, etc.

[0003] The outer conductor of the existing product is provided with two or more annular convex structures at intervals, and the inner wall of the shell is provided with annular grooves corresponding to the annular convex structures for inserting the annular convex structures, so as to rely on the annular convex structures to assemble and position the plastic shell and stop retreat. However, this annular convex structure is usually produced by a stamping process, which requires high precision of the stamping die, resulting in the annular convex bulge being prone to deformation, cracking, and dimensional instability, and production abnormalities, and low production efficiency. At the same time, the assembly and fixation of the existing products are mostly through multiple sets of extrusion, and the connection stability is poor. In addition, the various convex structures on the outer conductor will cause a sudden change in the characteristic impedance of the product, generate more signal reflections, affect the performance of RF signal transmission, and fail to meet better signal integrity requirements. Summary of the invention

[0004] The embodiment of the present invention provides a radio frequency connector to solve the problems of poor installation stability of the radio frequency connector, more signal reflections caused by sudden changes in signal transmission characteristic impedance, and poor signal transmission quality.

[0005] The embodiment of the present disclosure provides a radio frequency connector, comprising: a housing, defining a front-to-back connected installation chamber, wherein the inner wall of the installation chamber protrudes inward to form an annular positioning protrusion, dividing the installation chamber into a front installation chamber and a rear installation chamber; a plurality of convex ribs are provided on the inner edge of the annular positioning protrusion; a connecting portion, arranged in the installation chamber and passing through the front installation chamber and the rear installation chamber, the connecting portion sequentially comprising a cylindrical central conductor, an insulator and a cylindrical outer conductor from the inside to the outside; the outer conductor and the annular positioning protrusion form an interference fit through the convex ribs; a physical clamping protrusion is provided on the outer wall of the outer conductor located in the front installation chamber; a fixing portion, comprising a tubular wire clamp and a locking buckle; the tubular wire clamp sleeve is arranged on the outside of the outer conductor, and a clamping groove is provided on the side wall of the tubular wire clamp, and the clamping groove is correspondingly engaged with the physical clamping protrusion; the locking buckle is fixedly installed on the housing, the locking buckle comprises an extended end, and the extended end passes through the housing and is embedded in the front installation chamber; an outward flange is provided at the rear end of the tubular wire clamp, and the flange is fixedly clamped between the extended end and the annular positioning protrusion.

[0006] In one embodiment, the length of the rib in the front-to-back direction is greater than 10 mm.

[0007] In one of the embodiments, the convex ribs are evenly distributed along the circumferential direction on the inner edge of the annular positioning protrusion, and the convex ribs are arc-shaped along the circumferential direction.

[0008] In one embodiment, the outer conductor includes a fixed section, a mating section and a contact section which are connected in sequence; the outer diameter of the fixed section is larger than the outer diameter of the mating section, and the outer diameter of the mating section is larger than the outer diameter of the contact section; the fixed section is used to achieve an interference fit with the annular positioning protrusion; the physical clamping protrusion is provided on the mating section, and the tubular wire clamp is interference fit with the mating section; the contact section is inserted into the tubular wire clamp for contacting and connecting with the outer conductor of the connected cable.

[0009] In one of the embodiments, the tubular wire clamp includes a first clamping section and a second clamping section connected in sequence; the flange is arranged at the end of the first clamping section, the first clamping section is sleeved outside the mating section and has an interference fit with the mating section; the second clamping section and the contact section clamp the outer conductor of the cable.

[0010] In one embodiment, the contour of the lower end surface of the extended end is in conformity with the contour of the outer wall of the first clamping section.

[0011] In one of the embodiments, the central conductor is provided with a riveting section corresponding to the mating section, which is used for riveting connection with the inner core conductor of the connected cable.

[0012] In one embodiment, the insulator is provided with a conductor pipe, and the rear end of the center conductor is inserted into the conductor pipe and tightly fits with the conductor pipe; a first limiting rod is protruded from the outer wall of the center conductor corresponding to the end face of the conductor pipe, and the first limiting rod is in contact with the end face of the conductor pipe.

[0013] In one embodiment, the central conductor corresponding to the fixed section is an elastic plug-in section for inserting and clamping the connected conductor.

[0014] In one of the embodiments, the shell is provided with a lock mounting chamber corresponding to the mating section, the lock mounting chamber is provided with a socket connected to the front mounting chamber, and the protruding end extends through the socket to the front side of the flange.

[0015] In one embodiment, the shell further includes a second limiting rod, which extends from the hole wall into the socket; a limiting groove is provided at the extending end, and the second limiting rod is embedded in the limiting groove to limit the relative position of the lock buckle and the shell.

[0016] The above RF connector has at least the following beneficial effects: An annular positioning protrusion is arranged inside the shell, and the outer conductor is inserted into the shell to match the size of the annular positioning protrusion. A plurality of convex ribs are arranged on the inner edge of the annular positioning protrusion. The setting of the convex ribs reduces the inner diameter of the annular positioning protrusion, so that the annular positioning protrusion and the outer conductor form an interference fit connection, so as to increase the installation stability of the outer conductor. At the same time, the annular positioning protrusion divides the shell into a front installation chamber and a rear installation chamber, which can accurately separate the installation positions of the devices connected to the two ends of the connector, thereby increasing the installation accuracy. A tubular wire clamp sleeve is arranged outside the outer conductor, and the tubular wire clamp is fixedly connected to the shell by a lock buckle, thereby improving the structural consistency of the outer conductor and the center conductor, and reducing the influence of the characteristic impedance. By using a physical card convex and a card slot to clamp, a flange is arranged to abut against the end face of the annular positioning protrusion, and a detachable lock buckle is added for matching and limiting, which can greatly improve the installation stability and facilitate disassembly and assembly, while reducing the structure of the outer conductor generated by the positioning needs, so as to improve the structural consistency of the outer conductor and the center conductor, and reduce the influence of the characteristic impedance on the transmission of the radio frequency signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic cross-sectional structural diagram of a radio frequency connector according to an embodiment; Figure 2 This is a schematic structural diagram of a radio frequency connector according to an embodiment; Figure 3 for Figure 2 Schematic diagram of the middle A direction; Figure 4 A schematic structural diagram of a housing according to an embodiment; Figure 5 It is a structural schematic diagram of a tubular wire clamp according to an embodiment; Figure 6 is a schematic structural diagram of a lock buckle according to an embodiment; Figure 7 is a schematic structural diagram of an outer conductor of an embodiment; Figure 8 is a schematic structural diagram of a central conductor of an embodiment; Fig. 9 is a schematic structural diagram of an insulator according to an embodiment; Fig.10 is a schematic cross-sectional structural diagram of an insulator according to an embodiment; Fig.11 A schematic structural diagram of a housing according to an embodiment; Fig.12 For along Figure 1 Schematic diagram of the cross-sectional structure in the AA direction; Fig.13 A schematic diagram of a radio frequency connector simulation interface according to an embodiment; Fig.14 For application Fig.13 Perform simulation on the interface shown to obtain a simulation data; Fig.15 For application Fig.13 The interface shown is used to perform simulation to obtain another simulation data; Fig.16 For application Fig.13 The interface shown is simulated to obtain another simulation data.

[0019] Reference numerals: 10. RF connector; 11. housing; 111. front mounting chamber; 112. rear mounting chamber; 113. annular positioning protrusion; 1131. convex rib; 114. lock mounting compartment; 1141. jack; 115. second limiting rod; 116. block; 12. connecting part; 121. center conductor; 1211. riveted section; 1212. first limiting rod; 1213. elastic plug section; 122. insulator; 1221. conductor pipe; 122 2. Fastening protrusion; 123. Outer conductor; 1231. Solid clamping protrusion; 1232. Fixing section; 1233. Fitting section; 1234. Contact section; 13. Fixing portion; 131. Tubular wire clamp; 1311. Clamping groove; 1312. Flanging; 1313. First clamping section; 1314. Second clamping section; 132. Locking buckle; 1321. Extending end; 1322. Limiting groove; 1323. Clamping hole; 1324. Top surface; 1325. Side surface. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there can be a central element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there can be a central element at the same time. The terms "vertical", "horizontal", "left", " "right" and similar expressions are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0022] refer to Figures 1 to 16As shown, the present invention discloses a radio frequency connector 10, including a housing 11, a connecting portion 12 and a fixing portion 13. The housing 11 defines an installation chamber that is connected front to back, the inner contour of the installation chamber is cylindrical and connected front to back, and the inner wall of the installation chamber is provided with a fixing structure for fixing and connecting the connected parts. The inner wall of the installation chamber protrudes inward to form an annular positioning protrusion 113, and the annular positioning protrusion 113 is arranged in the middle position of the front-to-back direction of the installation chamber, dividing the installation chamber into a front installation chamber 111 and a rear installation chamber 112, so that the front installation chamber 111 and the rear installation chamber 112 are both of sufficient length to fix and install the connected parts. A plurality of convex ribs 1131 are provided on the inner edge of the annular positioning protrusion 113, and the convex rib 1131 is connected with the annular positioning protrusion 113 in the front-to-back direction of the installation chamber. When the outer conductor 123 is inserted into the annular positioning protrusion 113, the inclined surface of the convex rib 1131 plays a transition guide role, which is convenient for installation. The connection part 12 is arranged in the installation room and passes through the front installation room 111 and the rear installation room 112. The connection part 12 includes a cylindrical center conductor 121, an insulator 122 and a cylindrical outer conductor 123 from the inside to the outside. The outer conductor 123 is sleeved outside the insulator 122, and the insulator 122 is sleeved outside the center conductor 121. The insulator 122 is fixed with the inner wall of the outer conductor 123 by interference fit. A cylindrical plug hole is arranged in the insulator 122. The center conductor 121 is inserted into the plug hole of the insulator 122 and is tightly fitted with the inner wall of the plug hole of the insulator 122. The front aperture of the plug hole of the insulator 122 is larger than the rear aperture, and the center conductor 121 is inserted into the insulator 122 from the front to the back. The outer conductor 123 and the annular positioning protrusion 113 form an interference fit through the convex rib 1131, and the convex rib 1131 clamps the outer conductor 123. The fixing part 13 includes a tubular wire clamp 131 and a lock buckle 132; the tubular wire clamp 131 is sleeved on the outside of the outer conductor 123, and a slot 1311 is provided on the side wall of the tubular wire clamp 131. The outer wall of the outer conductor 123 located in the front installation chamber 111 is provided with a physical locking protrusion 1231, and the physical locking protrusion 1231 is inserted into the slot 1311 to achieve a snap-on fixation. The lock buckle 132 is fixedly installed on the housing 11, and the lock buckle 132 is fixedly connected to the outer wall of the housing 11. The lock buckle 132 includes an extended end 1321, and the extended end 1321 passes through the housing 11 and is embedded in the front installation chamber 111; the rear end of the tubular wire clamp 131 is provided with an outward flange 1312, and the flange 1312 is fixedly inserted between the extended end 1321 and the annular positioning protrusion 113. The protruding end 1321 and the annular positioning protrusion 113 clamp the flange 1312 to fix the tubular clamp 131. Since the tubular clamp 131 is connected to the outer conductor 123 by clamping, the outer conductor 123 is further fixed. At the same time, the rear end of the tubular clamp 131 is sleeved outside the outer conductor 123 to achieve a tight fit with the outer conductor 123. The outer conductor 123 is double fixed by the tubular clamp 131 and the annular positioning protrusion 113 to achieve position locking.

[0023] Exemplarily, the installation of the RF connector 10 includes the following steps: Insert the insulator 122 into the outer conductor 123. The fastening protrusion 1222 on the outside of the insulator 122 has a tapered profile, and the insulator 122 is inserted into the outer conductor 123 from back to front, and the small end of the tapered profile of the fastening protrusion 1222 first enters the outer conductor 123, and as the large end of the tapered profile of the fastening protrusion 1222 enters the outer conductor 123, the insulator 122 and the outer conductor 123 gradually achieve a tight fit.

[0024] The core conductor of the coaxial cable is connected to one end of the center conductor 121 by riveting, and the other end of the center conductor 121 is inserted from front to back into the insulator 122. At the same time, the contact section 1234 of the outer conductor 123 is inserted between the outer conductor of the coaxial cable and the insulating layer of the coaxial cable. The first limiting rod 1212 of the center conductor 121 is located between the riveted section 1211 and the elastic plug section 1213. When the elastic plug section 1213 is fully inserted into the insulator 122, the first limiting rod 1212 abuts against the front end surface of the conductor pipe 1221. At this time, the riveted section 1211 corresponds to the matching section 1233 of the outer conductor 123.

[0025] Insert the outer conductor 123 into the installation chamber until the fixed section 1232 of the outer conductor 123 corresponds to the annular positioning protrusion 113, wherein the joint between the matching section 1233 and the fixed section 1232 corresponds to the front end of the annular positioning protrusion 113. The outer conductor 123 can be inserted from front to back. Or from back to front. In the case where the outer conductor 123 is inserted from back to front, the installation sequence needs to be adjusted to first insert the outer conductor 123 into the housing 11 from back to front, and then insert the assembly of the insulator 122 and the center conductor 121 into the outer conductor 123 from front to back.

[0026] Insert the tubular wire clamp 131 into the front installation chamber 111 from front to back until the flange 1312 abuts against the front end surface of the annular positioning protrusion 113, and the physical clamping protrusion 1231 is clamped into the clamping groove 1311. Make the first clamping section 1313 of the tubular wire clamp 131 correspond to the matching section 1233.

[0027] The lock buckle 132 is installed on the housing 11 so that the protruding end 1321 abuts against the front side of the flange 1312. The lock buckle 132 is first buckled on the lock buckle installation compartment 114 of the housing 11, and the protruding end 1321 abuts against the flange 1312 of the tubular wire clamp 131. At the same time, the second limiting rod 115 is plugged into the limiting groove 1322, and the end of the protruding end 1321 is engaged with the outer wall of the tubular wire clamp 131 through the clamping hole 1323 and the clamping block 116.

[0028] In one embodiment, the length of the rib 1131 in the front-to-back direction is greater than 10 mm. The outer conductor 123 is inserted into the annular positioning protrusion 113, and the annular positioning protrusion 113 clamps the outer conductor 123 through the rib 1131. At the same time, the contact length between the rib 1131 and the outer conductor 123 in the front-to-back installation direction is greater than 10 mm, which can limit the outer conductor 123 from rotating in the front-to-back direction while limiting the front-to-back movement and circumferential movement of the outer conductor 123.

[0029] refer to Figures 1 to 3 As shown, the ribs 1131 are evenly spaced along the circumferential direction on the inner edge of the annular positioning protrusion 113, and the ribs 1131 are arc-shaped along the circumferential direction and convex in the middle, so that the outer conductor 123 is in linear contact with each rib 1131 to reduce the resistance of the outer conductor 123 inserted into the annular positioning protrusion 113.

[0030] refer to Figures 1 to 7 As shown, the outer conductor 123 includes a fixed section 1232, a matching section 1233 and a contact section 1234 which are connected in sequence. The outer diameter of the fixed section 1232 is larger than the outer diameter of the matching section 1233, and the outer diameter of the matching section 1233 is larger than the outer diameter of the contact section 1234. The fixed section 1232 is used to achieve interference fit with the annular positioning protrusion 113. The connection between the fixed section 1232 and the matching section 1233 corresponds to the front end surface of the annular positioning protrusion 113. The physical clamping protrusion 1231 is convexly arranged on the matching section 1233, and the tubular wire clamp 131 is sleeved outside the outer conductor 123. A gap is provided on the side wall of the tubular wire clamp 131. When the tubular wire clamp 131 is sleeved on the outer conductor 123, the tubular wire clamp 131 is stretched open to achieve interference fit with the matching section 1233. The flange 1312 of the tubular wire clamp 131 abuts against the front end surface of the annular positioning protrusion 113. The contact section 1234 is inserted into the tubular clamp 131 and is in contact with the outer conductor of the connected cable.

[0031] refer to Figures 1 to 5 As shown, the tubular wire clamp 131 includes a first clamping section 1313 and a second clamping section 1314 connected in sequence. The flange 1312 and the slot 1311 are both provided at the end of the first clamping section 1313. The first clamping section 1313 is sleeved outside the mating section 1233 and has an interference fit with the mating section 1233. The physical clamping protrusion 1231 of the mating section 1233 is inserted into the slot 1311. The second clamping section 1314 is sleeved outside the contact section 1234 and clamps the outer conductor of the cable together with the contact section 1234.

[0032] refer to Figure 1 , Figure 6 and Fig.12As shown, the lower end surface profile of the extension end 1321 fits the outer wall profile of the first clamping section 1313. The extension end 1321 extends into the housing 11 from the lock mounting chamber 114 on one side of the housing 11, the end of the extension end 1321 is arc-shaped, the outer wall of the tubular wire clamp 131 is arc-shaped, the extension end 1321 is inserted into the installation chamber, and the arc-shaped end of the extension end 1321 is adapted to the outer wall of the tubular wire clamp 131 to limit the movement of the tubular wire clamp 131.

[0033] like Fig.12 As shown, there are at least two protruding ends 1321 , which are arranged at intervals. The second limiting rod 115 is inserted into the gap between two adjacent protruding ends 1321 along the front-to-back direction to limit the movement of the lock buckle 132 .

[0034] refer to Figures 1 to 8 As shown, the central conductor 121 is provided with a riveted section 1211 corresponding to the matching section 1233, which is used for riveting and connecting with the inner core conductor of the connected cable. A first limiting rod 1212 is provided between the riveted section 1211 and the elastic plug-in section 1213. The riveted section 1211 is riveted with the inner core conductor of the connected cable. The elastic plug-in section 1213 drives the riveted section 1211 with the inner core conductor of the cable to be inserted into the insulator 122. When the riveted section 1211 moves to match the matching section 1233, the first limiting rod 1212 abuts against the front end surface of the conductor pipe 1221 to prevent the riveted section 1211 from continuing to move backward. The elastic plug-in section 1213 is tightly matched with the conductor pipe 1221. The elastic plug-in section 1213 is hollow inside and is used for plugging in other connected parts to connect the connected cable with other connected parts.

[0035] refer to Figures 1 to 10 As shown, the insulator 122 is provided with a conductor pipe 1221, and the rear end of the center conductor 121 is inserted into the conductor pipe 1221 and tightly fits with the conductor pipe 1221; a first limiting rod 1212 is protruded from the outer wall of the center conductor 121 corresponding to the end face of the conductor pipe 1221, and the first limiting rod 1212 is in contact with the end face of the conductor pipe 1221.

[0036] In some embodiments, Figures 1 to 10As shown, the outer wall of the insulator 122 is provided with a fastening protrusion 1222, and the front end of the fastening protrusion 1222 is connected with the outer wall of the insulator 122 through an inclined surface. During the installation process, the insulator 122 is inserted into the outer conductor 123 from back to front, and the inclined surface first enters the outer conductor 123, and the fastening protrusion 1222 then enters the outer conductor 123. The outer end of the fastening protrusion 1222 contacts the inner wall of the outer conductor 123. The outer diameter of the fastening protrusion 1222 is larger than the inner diameter of the outer conductor 123, so that the fastening protrusion 1222 and the outer conductor 123 form a tight fit, and the relative position between the insulator 122 and the outer conductor 123 is fixed. The material of the insulator 122 has a certain elasticity, including rubber or plastic, so as to reduce the difficulty of inserting the insulator 122 into the outer conductor 123. At the same time, when the rubber or plastic is matched with the outer conductor 123, it can have a greater friction force than the rigid material, and can better fix the relative position between the insulator 122 and the outer conductor 123.

[0037] refer to Figures 1 to 8 As shown, the fixed section 1232 corresponding to the center conductor 121 also includes an elastic plug-in section 1213 for inserting and clamping the connected conductor. The elastic plug-in section 1213 is hollow in the middle, and the side wall is provided with an opening so that when the connected conductor is inserted in the middle, the connected conductor will stretch the elastic plug-in section 1213, and the connected conductor will be clamped under the self-restoring force of the elastic plug-in section 1213. Among them, the length of the elastic plug-in section 1213 corresponds to the length of the conductor pipe 1221, and a trumpet-shaped limiting plate is provided at the rear end of the elastic plug-in section 1213. After the center conductor 121 is inserted into the insulator 122, the first limiting guide rod abuts against the front end of the conductor pipe 1221 to limit the center conductor 121 from moving backward relative to the insulator 122; the trumpet-shaped limiting plate at the rear end of the elastic conductor abuts against the rear end of the insulator 122 to limit the center conductor 121 from moving forward, thereby fixing the relative position of the center conductor 121 and the insulator 122.

[0038] refer to Figures 1 to 12 As shown, the housing 11 is provided with a lock mounting chamber 114 corresponding to the matching section 1233, and the lock mounting chamber 114 is provided with a plug hole 1141 connected to the front mounting chamber 111, and the extended end 1321 extends through the plug hole 1141 to the front side of the flange 1312. Figure 4 As shown, the lock installation chamber 114 includes a groove formed on the front side wall of the housing 11, the groove is connected to the front installation chamber 111 through the plug hole 1141, and the side walls of the housing 11 corresponding to both sides of the groove are provided with a card block 116. Figure 6As shown, the lock buckle 132 includes a top surface 1324 and side surfaces 1325 adjacent to the top surface 1324 and located on both sides of the top surface 1324. The side surfaces 1325 on both sides are provided with clamping holes 1323 corresponding to the clamping block 116. The lock buckle 132 is buckled on the groove of the housing 11 to close the insertion hole 1141. The clamping holes 1323 on both sides of the lock buckle 132 are clamped and fixed with the corresponding clamping block 116. The front end of the lock buckle 132 is provided with an extension end 1321, which is perpendicular to the top surface 1324 of the lock buckle 132. When the lock buckle 132 is buckled on the groove, the extension end 1321 passes through the insertion hole 1141 and is inserted into the front installation chamber 111 to fit with the outer wall of the tubular wire clamp 131.

[0039] refer to Figures 1 to 12 As shown, the housing 11 further includes a second limiting rod 115, and the second limiting rod 115 extends from the wall of the insertion hole 1141 into the insertion hole 1141. Fig.11 As shown, the second limiting rod 115 extends from the front to the back, and is tilted from the top to the bottom (i.e., tilted radially toward the installation room). The extending end 1321 corresponds to the second limiting rod 115 and is provided with a limiting groove 1322. The second limiting rod 115 is embedded in the limiting groove 1322 to limit the relative position of the lock buckle 132 and the housing 11. The two side walls of the limiting groove 1322 are in contact with the side walls of the second limiting rod 115. The second limiting rod 115 is inserted into the limiting groove 1322 from the top to the bottom. After the lock buckle 132 is snap-fitted and installed with the housing 11, the upper surface of the second limiting rod 115 abuts against the bottom of the limiting groove 1322 to limit the extending end 1321 of the lock buckle 132 to fit with the outer wall of the tubular wire clamp 131, so that when the RF connector 10 is used in a vibration situation, the positions of the various components are stable and will not move.

[0040] In the embodiment of the present disclosure, a simulation test is performed on the radio frequency signal transmission performance of the radio frequency connector 10, and the specific testing means are: (1) Set the simulation parameters of the simulation software.

[0041] (2) Import the RF connector 10 model into the simulation software.

[0042] (3) Adjust the test signal frequency to 0 to 6 GHz.

[0043] (4) Record the voltage standing wave ratio, insertion loss and return loss respectively.

[0044] The various parameter standards defined in the fifth edition of the USCAR17 automotive RF connector system performance specification are shown in Table 1 below: Table 1 According to Table 1, the fifth edition of the USCAR17 standard defines the performance specifications of automotive RF connector systems. When the frequency is 3 to 6 GHz, the voltage standing wave ratio is 1.6, the return loss is 12.74 dB, and the insertion loss is 0.45 dB. Among them, the voltage standing wave ratio refers to the ratio of the standing wave antinode voltage to the node voltage amplitude, also known as the standing wave coefficient or standing wave ratio. When the standing wave ratio is equal to 1, it means that the impedance of the feeder and the antenna is completely matched. At this time, all the high-frequency energy is radiated by the antenna, and there is no energy reflection loss. When the standing wave ratio is infinite, it means total reflection, and no energy is radiated at all. Therefore, the ideal value of the voltage standing wave ratio is 1. The closer it is to 1, the better the signal transmission performance. Return loss, also known as reflection loss, indicates that part of the incident power is reflected back to the signal source. Return loss is the ratio of the reflected wave power to the incident wave power at the transmission line port, expressed as an absolute value in logarithmic form, and the unit is dB. For example, if 1mW (0dBm) of power is injected, 10% of it is reflected (bounced) back. From a mathematical point of view, the return loss is -10 lg [(reflected power) / (incident power)], with an absolute value of 10, and the return loss is 10dB. Return loss is the reflection caused by impedance mismatch in the cable link, which is the reflection of a pair of wires themselves. The mismatch mainly occurs at the connector, but it can also occur at places where the characteristic impedance changes in the cable. Return loss will introduce signal fluctuations, and the returned signal will be mistaken for the received signal by the duplex Gigabit network, causing confusion. In high-frequency applications, it reflects the proportion of the traveling wave reflected at the "transition point" of the protection device. Under this parameter, the degree of matching between the protection device and the surge impedance of the system can be directly measured. Generally speaking, the larger the return loss value, the less signal energy is reflected back, and the better the transmission performance. Insertion loss represents the ratio of transmission power to input power. Under ideal matching conditions, insertion loss is minimum.

[0045] according to Figures 13 to 16 As shown, according to the above method, the RF connector 10 in this embodiment is simulated, as shown in FIG. As shown in Figure 13, a completely identical model is drawn based on the structure, and the model is imported into the RF signal simulation software. The parameters are set according to the actual application parameters. The frequency is selected from 0 to 6 GHz for simulation, and the voltage standing wave ratio, return loss and insertion loss are statistically obtained. Fig.14 It can be seen that as the frequency increases, the voltage standing wave ratio gradually increases and reaches 1.0283GHz at a frequency of 6GHz. Fig.14 It can be concluded that at a frequency of 6 GHz, the simulation results of the RF connector 10 in this embodiment show a voltage standing wave ratio of 1.0283, which is significantly improved compared to the 1.6 defined in the fifth edition of the USCAR17 system performance specification for automotive RF connectors 10. Fig.15It can be seen that at a frequency of 6 GHz, the simulation results of the RF connector 10 in this embodiment show that the return loss reaches -37.0971, and its absolute value 37.0971 far exceeds the 12.74 defined in the fifth edition of the USCAR17 system performance specification for automotive RF connectors 10, that is, the reflection loss is greatly improved, so the interference signal reflected back is greatly reduced, which significantly improves the transmission performance. Fig.16 It can be seen that at a frequency of 6 GHz, the simulation results of the RF connector 10 in this embodiment show an insertion loss of -0.2462, and the absolute value of 0.2462 is much smaller than 0.45 defined in the fifth edition of the USCAR17 system performance specification for automotive RF connectors 10.

[0046] In summary, it can be concluded that according to the RF connector 10 provided in the above embodiment, through structural improvement, an annular positioning protrusion 113 matching the outer wall of the outer conductor 123 is provided in the shell 11, and a convex rib 1131 is provided on the matching surface of the annular positioning protrusion 113 and the outer conductor 123, and the convex rib 1131 is used to realize the fastening connection between the shell 11 and the outer conductor 123, and the convex hull provided on the outer wall of the outer conductor 123 is eliminated to match with the shell 11, so as to improve the consistency of the outer wall profile of the outer conductor 123 and the central conductor 121, and at the same time, the tubular wire clamp 131 is used to indirectly fix the outer conductor 123 and the shell 11. The outer wall of the outer conductor 123 is used to set a physical protrusion 1231 to be inserted into the slot 1311 of the tubular wire clamp 131, and then a lock buckle 132 is added to indirectly connect the tubular wire clamp 131 and the outer shell 11. By setting the protruding end 1321 of the lock buckle 132 at a suitable position, the protruding end 1321 of the lock buckle 132 is matched with the end of the annular positioning protrusion 113 of the outer shell 11 to clamp the tubular wire clamp 131, which greatly increases the position stability of the tubular wire clamp 131. The connection stability of the outer conductor 123 and the outer shell 11 is greatly increased by the cooperation between the physical protrusion 1231 and the slot 1311. Since the lock buckle 132 and the housing 11 can be stably connected through the clamp hole 1323 and the clamp block 116, the housing 11 is provided with a second limiting rod 115, a limiting groove 1322 corresponding to the second limiting rod 115 is provided on the lock buckle 132, and an arc-shaped matching structure adapted to the tubular wire clamp 131 is provided on the end surface of the extended end 1321 of the lock buckle 132. The second limiting groove 1322 is adapted to the second limiting rod 115 to further improve the position accuracy of the lock buckle 132, and the second limiting rod 115 can abut against the second limiting groove 1322 at a determined position to control the installation position of the extended end 1321 and the tubular wire clamp 131. In addition, the central conductor 121 is provided to include a front riveted section 1211 and a rear elastic plug-in section 1213, and the riveted section 1211 is riveted to one of the connected cable conductors, and the riveted length corresponds to the adaptation length of the outer conductor 123 and the tubular wire clamp 131. The elastic plug-in section 1213 is used to plug and mate with the other connected part, wherein the elastic plug-in section 1213 corresponds to the fixed section 1232 of the outer conductor 123, and the contact section 1234 of the outer conductor 123 corresponds to the second clamping section 1314 of the tubular clamp 131, and the outer diameters of the various mating sections 1233 are different, so that the RF connector 10 has a high degree of structural consistency from the inside to the outside at all stages, and the various components are interlocked, interconnected, and controlled with each other, which greatly improves the structural stability of the RF connector 10, so that even when used in an environment with vibration, the various components can have good tightness and fit, so as to improve the transmission reliability of the RF signal and improve the signal transmission performance of the RF connector 10.

[0047] The technical features of the above-mentioned embodiments can be combined arbitrarily. All possible combinations of various technical features are described; however, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it is not exhaustive. Therefore, it can be understood as a limitation on the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the invention, which all belong to the protection scope of the invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A radio frequency connector, characterized in that: include: The housing defines a front-to-back connected installation chamber, wherein the inner wall of the installation chamber protrudes inward to form an annular positioning protrusion, dividing the installation chamber into a front installation chamber and a rear installation chamber; the inner edge of the annular positioning protrusion is provided with a plurality of convex ribs; A connecting part is arranged in the installation chamber and penetrates the front installation chamber and the rear installation chamber, wherein the connecting part comprises a cylindrical central conductor, an insulator and a cylindrical outer conductor in sequence from the inside to the outside; the outer conductor and the annular positioning protrusion form an interference fit through the convex rib; and a solid clamping protrusion is arranged on the outer wall of the outer conductor located in the front installation chamber; The fixing part comprises a tubular wire clamp and a lock buckle; the tubular wire clamp sleeve is arranged on the outside of the outer conductor, and the side wall of the tubular wire clamp is provided with a card slot, and the card slot is correspondingly engaged with the physical card protrusion; the lock buckle is fixedly installed on the shell, and the lock buckle comprises an extended end, and the extended end passes through the shell and is embedded in the front installation chamber; the rear end of the tubular wire clamp is provided with an outward flange, and the flange is fixedly inserted between the extended end and the annular positioning protrusion.

2. The radio frequency connector according to claim 1, characterized in that: The convex ribs are evenly distributed on the inner edge of the annular positioning protrusion at intervals along the circumferential direction, and the convex ribs are arc-shaped along the circumferential direction.

3. The radio frequency connector according to claim 1, characterized in that: The outer conductor includes a fixed section, a mating section and a contact section which are connected in sequence; the outer diameter of the fixed section is larger than the outer diameter of the mating section, and the outer diameter of the mating section is larger than the outer diameter of the contact section; the fixed section is used to achieve an interference fit with the annular positioning protrusion; the physical clamping protrusion is provided on the mating section, and the tubular wire clamp is interference fit with the mating section; the contact section is inserted into the tubular wire clamp, and is used to contact and connect with the outer conductor of the connected cable.

4. The radio frequency connector according to claim 3, characterized in that: The tubular wire clamp comprises a first clamping section and a second clamping section connected in sequence; the flange is arranged at the end of the first clamping section, the first clamping section is sleeved outside the mating section and has an interference fit with the mating section; the second clamping section and the contact section clamp the outer conductor of the cable.

5. The radio frequency connector according to claim 4, characterized in that: The contour of the lower end surface of the extended end is in conformity with the contour of the outer wall of the first clamping section.

6. The radio frequency connector according to any one of claims 1 to 5, characterized in that: The central conductor is provided with a riveting section corresponding to the matching section, which is used for riveting connection with the inner core conductor of the connected cable.

7. The radio frequency connector according to any one of claims 1 to 5, characterized in that: The insulator is provided with a conductor pipe, and the rear end of the central conductor is inserted into the conductor pipe and tightly matched with the conductor pipe; the outer wall of the central conductor is convexly provided with a first limiting rod corresponding to the end face of the conductor pipe, and the first limiting rod is in contact with the end face of the conductor pipe.

8. The radio frequency connector according to claim 7, characterized in that: The central conductor further includes an elastic plug-in section corresponding to the fixed section, which is used for inserting and clamping the connected conductor.

9. The radio frequency connector according to any one of claims 1 to 5, characterized in that: The shell is provided with a lock installation chamber corresponding to the matching section, and the lock installation chamber is provided with a plug hole connected to the front installation chamber, and the protruding end extends through the plug hole to the front side of the flange.

10. The radio frequency connector according to claim 9, characterized in that: The shell also includes a second limiting rod, which extends from the hole wall into the socket; the extending end is provided with a limiting groove, and the second limiting rod is embedded in the limiting groove to limit the relative position of the lock buckle and the shell.

Images