CN108155499B

CN108155499B - Board-to-board radio frequency plug, socket and connector assembly thereof

Info

Publication number: CN108155499B
Application number: CN201711263342.2A
Authority: CN
Inventors: 计亚斌; 陈小硕; 陆苏; 邓红波
Original assignee: JUST CONNECTOR KUNSHAN CO Ltd; Shenzhen Everwin Precision Technology Co Ltd
Current assignee: Kunshan Kta Communication Technology Co ltd; Shenzhen Everwin Precision Technology Co Ltd
Priority date: 2017-12-04
Filing date: 2017-12-04
Publication date: 2020-06-12
Anticipated expiration: 2037-12-04
Also published as: CN108155499A

Abstract

The utility model provides a board to board type radio frequency plug, includes the plug body, arrange in a plurality of plug terminals in the plug body, enclose and locate the plug mounting, the coaxial line of plug body periphery and be used for connecting the plug circuit board of plug terminal and coaxial line, the plug body include the body base, certainly the body outer wall that the body base periphery upwards integrative extension formed, certainly in the middle of the body base upwards integrative extension formed island portion and formed at the body outer wall with the space of planting between the island portion, the periphery of body base outwards extends and is formed with platform portion, the plug mounting is including enclosing and locating the fixed frame of body outer wall periphery and certainly the parallel diapire that the perpendicular extension of fixed frame bottom formed, the parallel diapire laminating in on the platform portion. The application also provides a radio frequency socket and a connector assembly thereof.

Description

Board-to-board radio frequency plug, socket and connector assembly thereof

Technical Field

The present application relates to the field of rf connectors, and more particularly, to a board-to-board rf plug, socket and connector assembly thereof.

Background

A PCB of an existing mobile phone generally has a radio frequency connector connected to a coaxial cable to transmit radio frequency signals, such as antenna signals and high frequency signals between different boards;

the 5G communication technology is coming, the frequency is further improved, the existing technical scheme of adopting a coaxial line to transmit radio frequency signals cannot meet the capacity requirement, the requirement of the frequency improvement on high-frequency interference is stricter, and meanwhile, the crosstalk among a plurality of radio frequency signals also needs a solution.

Disclosure of Invention

In view of the above, it is desirable to provide a board-to-board rf plug, a socket and a connector assembly thereof with stable buckling and good shielding performance.

In order to solve the above technical problems, the present application provides a plate-to-plate type radio frequency plug, which comprises a plug body, a plurality of plug terminals disposed in the plug body, a plug fixing member disposed around the periphery of the plug body, a coaxial line and a plug circuit board for connecting the plug terminals and the coaxial line, the plug body comprises a body base, a body outer wall integrally extending upwards from the periphery of the body base, an island part integrally extending upwards from the middle of the body base and an inserting space formed between the body outer wall and the island part, the periphery of body base outwards extends and is formed with platform portion, the plug mounting is including enclosing to be located the fixed frame of body outer wall periphery and certainly the parallel diapire that fixed frame bottom extends perpendicularly and forms, parallel diapire paste cover in on the platform portion.

Preferably, the parallel bottom wall of the plug fixing member is cut at a position where the plug terminal extends out to form a notch to avoid the plug terminal, and the bottom surface of the parallel bottom wall is provided with a plurality of welding parts to be welded on the plug circuit board.

Preferably, the four corners of the fixed outer frame are provided with first buckling parts.

Preferably, the plug terminal includes a first leg extending from a lower side of the cutout to the plug body and a first U-shaped contact portion formed by bending one end of the first leg, the first U-shaped contact portion is buckled outside the island portion, and the first U-shaped contact portion includes two contact portions located on an outer surface of a vertical portion of the island portion.

Preferably, plug circuit board includes the first plate body, locates a plurality of plug signal lines on the first plate body and locate a plurality of plug earth connection between two adjacent plug signal lines, the plug signal line include with first section portion, second section portion and the connection that the central conductor of coaxial line is connected first section portion with the linkage segment portion of second section portion, the width of linkage segment portion certainly first section portion diminishes towards second section portion direction gradually, the plug terminal respectively with the plug earth connection with the second section portion of plug signal line is connected.

Preferably, the overall width of the plug signal line and the plug ground line in the first section area is greater than the overall width of the plug signal line and the plug ground line in the second section area, a plug ground line is arranged on each of two sides of each plug signal line, and the plug ground lines extend along the shape of the plug signal lines.

Preferably, the plugging direction of the board-to-board radio frequency plug is perpendicular to the plane of the plug circuit board, and the central conductor of the coaxial line is soldered on the plug signal line of the plug circuit board in parallel.

For solving above-mentioned technical problem, this application still provides a board to board type radio frequency socket, include socket circuit board, socket ontology, arrange in socket ontology is last and weld in socket fixing spare and socket terminal on the socket circuit board, socket ontology includes the body bottom plate, certainly the body bottom plate upwards integrative rail that extends formation, set up in butt joint chamber in the rail reaches certainly the body bottom plate outwards extends the bottom plate extension that forms, socket fixing spare integrated into one piece in on the bottom plate extension, the socket fixing spare include frame construction and certainly the welding part that frame construction's bottom extended the formation, socket ontology's rail with be formed with the holding clearance between the frame construction.

Preferably, the socket body further includes a terminal groove penetrating through the body bottom plate and communicating to the docking cavity, and the socket terminal is inserted into the terminal groove from the bottom of the body bottom plate.

Preferably, the frame structure is cut off at a position corresponding to the socket terminal and extending out of the socket body to form a notch, and the positions of four corners of the frame structure are provided with second buckling parts.

Preferably, the socket terminal includes a second solder leg, a second U-shaped contact portion formed by bending one end of the second solder leg multiple times, and an end portion formed by bending the end of the second U-shaped contact portion in the opposite direction, and the second U-shaped contact portion includes two contact portions located on two opposite inner side wall surfaces of the mating cavity.

Preferably, a gap is formed between the second U-shaped contact portion and the socket body to make the second U-shaped contact portion elastic.

Preferably, the socket circuit board includes a base, and a plurality of socket signal lines and socket ground lines formed on the base for welding the socket terminal, and both sides of each socket signal line are provided with the socket ground line, the socket signal line includes a welding region welded with the socket terminal and an extension region extending from the welding region, and a width of the extension region gradually increases toward a direction away from the welding region.

Preferably, the plugging direction of the board-to-board radio frequency socket and the docking plug is perpendicular to the socket circuit board.

In order to solve the technical problem, the application further provides a board-to-board radio frequency connector assembly, which comprises a socket, a plug butted with the socket and a coaxial line connected to the plug, wherein the socket comprises a socket circuit board, a socket body, a socket fixing piece and a socket terminal, the socket fixing piece and the socket terminal are arranged on the socket body and welded on the socket circuit board, the socket body comprises a body bottom plate, a fence formed by upwards and integrally extending from the body bottom plate, a butt joint cavity formed in the fence and a bottom plate extending portion formed by outwards extending from the body bottom plate, the socket fixing piece is integrally formed on the bottom plate extending portion and comprises a frame structure and a welding portion formed by extending from the bottom of the frame structure, and an accommodating gap is formed between the fence of the socket body and the frame structure; the plug comprises a plug body, a plurality of plug terminals arranged in the plug body, a plug fixing piece arranged around the periphery of the plug body, a coaxial line and a plug circuit board used for connecting the plug terminals and the coaxial line, wherein the plug body comprises a body base, a body outer wall integrally extending upwards from the periphery of the body base, an island part integrally extending upwards from the middle of the body base and an inserting space formed between the body outer wall and the island part, the periphery of the body base outwards extends to form a platform part, the plug fixing piece comprises a fixed outer frame arranged around the periphery of the body outer wall and a parallel bottom wall vertically extending from the bottom of the fixed outer frame, the parallel bottom wall is attached to the platform part, when the plug is inserted on the socket, the island part of the plug is contained in the butt joint cavity of the socket, the fence of the socket is contained in the inserting space on the periphery of the island, the outer wall of the body of the plug and the fixed outer frame are inserted in the containing gap, and the plug fixing piece and the socket fixing piece are mutually electrically conducted to form a shielding passage.

Preferably, the plug terminal comprises a first leg and a first U-shaped contact portion bent from one end of the first leg, the first U-shaped contact portion is buckled outside the island, and the first U-shaped contact portion comprises two contact portions located on the outer surface of the vertical portion of the island; the socket terminal comprises a second welding leg, a second U-shaped contact part formed by bending one end of the second welding leg for multiple times and an end part formed by reversely bending the tail end of the second U-shaped contact part, and the second U-shaped contact part comprises two contact parts positioned on two opposite inner side wall surfaces of the butt joint cavity; the second U-shaped contact part is in buckling contact with the first U-shaped contact part.

This application is through installation or shaping plug mounting and socket mounting are in order strengthening on plug body and the socket ontology the intensity of plug and socket and the lock intensity between plug and the socket, simultaneously, make the plug mounting with the mutual electric contact of socket mounting forms the shielding route and in order to shield the radio frequency signal in plug and the socket better, avoids disturbing.

This application pioneering ground adopts the board to optimize the board structure with the RF radio frequency connector in order to adapt to the requirement that 5G radio frequency signal needs many transmission paths, simultaneously, carries out structure optimization design to the radio frequency signal transmission line on plug, the socket circuit board, adopts the improvement of width gradual change structure, has reduced impedance, has reduced radio frequency signal's reflection, can obtain very outstanding high frequency transmission performance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a perspective assembly view of the RF connector of the present application;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a perspective view of a plug of the present application;

FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 3;

FIG. 5 is an exploded perspective view of the plug of the present application;

FIG. 6 is a perspective view of the plug of the present application with the plug housing removed;

FIG. 7 is an exploded perspective view of the plug of the present application with the plug housing removed;

FIG. 8 is a top view of the printed circuit board and cable of the plug of the present application;

fig. 9 is a perspective view of a plug body and plug terminals of the plug of the present application;

fig. 10 is a perspective view of a plug holder of the plug of the present application;

figure 11 is a perspective view of the plug housing of the plug of the present application;

figure 12 is a top plan view of the plug housing of the plug of the present application;

FIG. 13 is a cross-sectional view taken along the line C-C shown in FIG. 12;

FIG. 14 is a cross-sectional view taken along the line D-D of FIG. 12;

FIG. 15 is a perspective assembly view of the socket of the present application;

FIG. 16 is an exploded perspective view of the socket of the present application;

FIG. 17 is a top view of the socket of the present application;

fig. 18 is a sectional view taken along the broken line E-E shown in fig. 17.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, a radio frequency connector assembly of the present application includes a socket B, a plug a mated with the socket B, and a coaxial line C connected to the plug a.

Referring to fig. 2 to 10, the plug a includes a plug body 20, a plurality of plug terminals 40 inserted or molded in the plug body 20, a plug fixing member 30 surrounding the plug body 20, a plug circuit board 50 for welding the plug terminals 40 and the plug fixing member 30, and a shielding shell 10.

As shown in fig. 9, the plug body 20 includes a body base 21, a body outer wall 22 integrally extending upward from the periphery of the body base 21, an island 23 integrally extending upward from the middle of the body base 21, and an insertion space 25 formed between the body outer wall 22 and the island 23. The outer periphery of the body base 21 is extended outward to form a terrace portion 211, and a covering portion 24 is extended from one side of the body base 21 where the plug terminal 40 is extended.

The plug terminal 40 includes a first solder leg 41 and a first U-shaped contact portion 43 bent from one end of the first solder leg 41. The first U-shaped contact 43 is snapped out of the island 23, the first U-shaped contact 43 comprising two

contacts

42,44 located on the outer surface of the vertical portion of the island 23. The first solder leg 41 extends from the lower portion of the covering portion 24 on the side of the body base 21 to the outside of the socket body 20.

Referring to fig. 7 and 10, the plug fixing member 30 includes a fixing frame 31, a through hole 32 surrounded by the fixing frame 31, and a parallel bottom wall 33 vertically extending from the bottom of the fixing frame 31. The parallel bottom wall 33 is attached to the top of the platform 211 of the plug body 20. The parallel bottom wall 33 and a part of the fixing frame 31 are cut to form a cut 34 corresponding to the covering part 24 of the plug body 20 to avoid the first solder leg 41 of the plug terminal 40. The bottom surface of the parallel bottom wall 33 is provided with a plurality of soldering portions 35 for soldering to the plug circuit board 50. The four corners of the fixed outer frame 31 are provided with first buckling parts 36.

As shown in fig. 6 and 8, the coaxial cable C includes a central conductor C1, a first insulating layer C2 covering the central conductor C1, a shielding braid C3 covering the first insulating layer C2, and a second insulating layer C4 covering the shielding braid C3.

The plug circuit board 50 includes a first board 51, a plurality of plug signal lines 53 disposed on the first board 51 and used for welding the central conductor C1 of the coaxial line C, a plurality of plug ground lines 52 spaced from the plug signal lines 53, and a plurality of solder joints 54 used for welding the solder joints 35 of the plug fixing member 30.

Each of the plug ground wire 52 and the plug signal wire 53 includes a first step 531 formed to extend in a longitudinal direction of the center conductor C1, a second step 534 corresponding to the first fillet 41, and a connection step 532 connecting the first step 531 and the second step 534. The distance between the two outermost first sections 531 is greater than the distance between the two outermost second sections 534, and the remaining connection sections 532, except for the connection section 532 of the innermost plug ground wire 52, extend obliquely to connect the first sections 531 with the corresponding second sections 534. The width of the connection segment 532 at the side of the first segment 531 is greater than the width at the side of the second segment 534, and the width of the connection segment 532 at the side of the first segment 531 is greater than the width of the first segment 531 to form a step 533. The connection step 532 is gradually narrowed from the first step 531 toward the second step 534, and a good high-frequency effect can be obtained by this structure: through testing, if the connection section 532 does not adopt a width gradually-changing structure, a high-frequency signal is easy to generate discontinuity and generate emission at the connection position of the central conductor C1 of the coaxial line C and the first section 531 of the plug circuit board 50, the high-frequency signal is not good, and in a through state, when the frequency is 1GHz, the standing wave ratio (VSWR) is 1.4; when the connection segment 532 has a width-gradient structure, the standing wave ratio (VSWR) is maintained at 1.17 in the through state at a frequency of 6 GHz. Therefore, the adoption of the width gradual change structure of the connecting section part 532 can effectively improve impedance, reduce reflection and improve high-frequency performance.

In one embodiment, the connection segment 532 of the plug ground line 52 does not need to have a width gradually changing structure, but only needs to clamp the plug signal line 53 between two plug ground lines 52, and the shape of the plug ground line 52 changes along with the shape of the plug signal line.

The plug ground lines 52 are disposed on both sides of the signal terminal 53 for transmitting high-frequency signals, so that the problem of crosstalk between adjacent high frequencies can be effectively reduced, and high-frequency crosstalk can be isolated. The Isolation (Isolation) using this structure was experimentally verified to be: when the frequency is from D.C to 3GHz, the isolation is 20dB min; when the frequency is from 3GHz to 6GHz, the isolation is 15dB min; the isolation is 10dB min when the frequency is from 6GHz to 11 GHz.

Referring to fig. 2 and fig. 11 to fig. 14, the shielding shell 10 is used for shielding the high-frequency signal transmitted by the plug terminal 40 of the plug a and the plug signal line 53 on the plug circuit board 50. The shielding shell 10 includes a base plate 11, a first covering wall 12 formed by bending and extending from one side of the base plate 11 in a reverse direction, a cover plate 13 formed by bending and extending from the first covering wall 12 in a vertical direction, a second covering part 14 formed by bending and extending from two sides of the base plate 11 adjacent to the first covering part 12 in a vertical direction, an opening 15 opened on the cover plate 13 for exposing the plug body 20 and the plug terminal 40 of the plug a to the outside, and a clip 16 formed by punching on the outer sides of the base plate 11 and the cover plate 13. The clips 16 are staggered on the base plate 11 and the cover plate 13. The clamp 16 is used for clamping the coaxial line C.

The cover plate 13 further includes a first cover plate portion 131 bent and extended from the first covering portion 12, a bent portion 133 bent and extended upward from the first cover plate portion 131, and an edge portion 132 formed outside the first cover plate portion 131 and the second cover plate portion 134. The opening 15 is opened in the first cover plate 131.

The second covering portion 14 includes a covering wall 141 and a press-connecting portion 142 formed by bending and extending inward from the covering wall 141, and the edge portion 132 of the cover plate 13 is pressed under the press-connecting portion 142. The edge 132 on the outer side of the second cover 134 is bent downward from the outer side of the second cover 134, and the edge 132 on both sides of the second cover 134 is on the same horizontal plane as the edge 132 on both sides of the first cover 131. The base plate 11, the cover plate 13 and the first and

second cover parts

12,14 enclose an accommodation space 17 for accommodating the plug body 20 and the plug fastener 30.

The plug fixing member 30 is sleeved outside the plug body 20, and the plug body 20 is fixed on the plug circuit board 50 by welding through the plug terminal 40 and the plug fixing member 30. The plug body 20, the plug terminal 40 thereon and the plug fixing member 30 are placed between the substrate 11 and the cover plate 13, the cover plate 13 is pressed, and finally the top end of the second covering part 14 is bent toward the edge part 132 to buckle the cover plate 13.

The plug body 20, the plug terminal 40 and the plug fixing member 30 are exposed out of the opening 15 of the cover plate 13, the first section 531 of the plug ground line 52 and the plug signal line 53 of the plug circuit board 50 is located at a position corresponding to the second cover plate 134, and the lower part of the second cover plate 134 is isolated from the plug ground line 52 and the plug signal line 53 by an insulating gasket 55 and presses the plug circuit board 50 and the central conductor C1 of the coaxial line C. The parallel bottom wall 33 of the plug holder 30 is held by the first cover plate 131 and the edge 132 of the outer periphery of the first cover plate 131, so that the plug body 20 is stably fixed in the housing space 17 of the shield case 10.

Coaxial line C's extending direction perpendicular to plug A and socket B's plug direction welds on plug circuit board 50 through plug A's socket ontology 20 and socket terminal 40 and plug mounting 30 promptly, will again coaxial line C welds on plug circuit board 50, does not increase the ultra-thin design of this application board to the thickness of plate radio frequency plug in order to accord with the smart mobile phone, makes simultaneously plug A makes things convenient for the equipment of connector with socket B plug in the vertical direction. Compared with the LVDS connector which is limited by the operation space in the horizontal installation mode, the plate has better installation convenience for the plate-to-plate radio frequency plug.

Except the interface of the plug A and the socket B, the plug A is completely covered in the shielding shell 10, so that high-frequency signals are completely shielded in the shielding shell 10, and electronic devices in the intelligent mobile phone cannot be influenced.

Referring to fig. 1, 2 and 15 to 18, the socket B includes a socket circuit board 90, a socket body 60 mounted on the socket circuit board 90, a socket fixing member 80 integrally formed on the socket body 60 and soldered to the socket circuit board 90, and socket terminals 70 mounted in the socket body 60 and soldered to the socket circuit board 90.

Referring to fig. 16, the socket body 60 includes a body bottom plate 61, a rail 62 integrally extending upward from the body bottom plate 61, a docking cavity 64 opened in the rail 62, a terminal slot 63 penetrating the body bottom plate 61 and communicating with the docking cavity 64, and a bottom plate extension 65 extending outward from the body bottom plate 61.

The socket terminal 70 is inserted into the terminal groove 63 from below the socket base plate 61, the socket terminal 70 includes a second solder leg 71, a second U-shaped contact portion 73 formed by bending one end of the second solder leg 71 multiple times, and an end portion 74 formed by bending the end of the second U-shaped contact portion 73 in the opposite direction, the second U-shaped contact portion 73 is in snap-fit contact with the first U-shaped contact portion 43 of the plug terminal 40, and the second U-shaped contact portion 73 includes two

other contact portions

75,76 electrically contacting with the two

contact portions

42,44 of the first U-shaped contact portion 43. The second U-shaped contact portion 73 has a gap from the socket body 60 to make the second U-shaped contact portion 73 elastic. The two

contact portions

75,76 of the second U-shaped contact portion 73 are located on the opposite wall surfaces of the mating cavity 64, and the island portion 23 of the plug body 20 is inserted into the mating cavity 64, so that the

contact portions

42,44 of the first U-shaped contact portion 43 located on the outer surface of the island portion 64 are electrically contacted with the

contact portions

75,76 of the second U-shaped contact portion 73 located on the inner surface of the mating cavity 64.

The socket fixing member 80 is integrally formed on the base plate extension 65. The socket fixing member 80 includes a frame structure 81, a welding portion 83 formed by extending from the bottom of the frame structure 81, and second fastening portions 84 provided at four corners of the frame structure 81. The second locking portion 84 is locked to the first locking portion 84 at four corners of the fixing outer frame 31 of the plug fixing member 30. The frame structure 81 is cut to form a notch 82 corresponding to the second solder tail 71, so that the second solder tail 71 can extend out of the socket body 60. An accommodating gap 66 is formed between the rail 62 of the socket body 60 and the frame structure 81, the outer body wall 22 of the plug body 20 and the fixing outer frame 31 of the plug fixing member 30 are inserted into the accommodating gap 66, and the fixing outer frame 31 and the frame structure 81 are electrically contacted to be grounded to form a closed shielding space.

The socket circuit board 90 includes a base 91, a plurality of socket signal wires 91 and socket ground wires 92 formed on the base 91 for soldering the socket terminals 70, and a plurality of solder joints 93 for soldering the soldering portions 83 of the socket fixing members 80.

The socket signal lines 91 and the socket ground lines 92 are disposed at intervals, that is, the socket ground lines 92 are disposed on both sides of each socket signal line 91. The socket signal line 91 includes a soldering region 913 soldered to the second solder leg 71 of the socket terminal 70 and an extending region 912 extending from the soldering region 913, and the width of the extending region 912 gradually increases toward a direction away from the soldering region 913, so that a good high frequency transmission effect can be obtained, which is the same as the transmission effect of the plug circuit board 50, and will not be described herein again.

Since the width of the extension region 912 of the receptacle signal line 91 is gradually widened, the entire width of the extension region 912 is greater than the entire width of the soldering region 913, thereby resulting in an inclined extension structure of the extension region 912. The socket ground wire 92 is arranged outside the socket signal wire 91, and the shape thereof changes with the change of the socket signal wire 91.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A board-to-board radio frequency plug is characterized by comprising a plug body, a plurality of plug terminals arranged in the plug body, a plug fixing piece, a coaxial line and a plug circuit board, wherein the plug fixing piece is arranged on the periphery of the plug body in a surrounding manner, the plug circuit board is used for connecting the plug terminals with the coaxial line, the plug body comprises a body base, a body outer wall integrally extending upwards from the periphery of the body base, an island part integrally extending upwards from the middle of the body base and an inserting space formed between the body outer wall and the island part, a platform part is formed by outwards extending the periphery of the body base, the plug fixing piece comprises a fixing outer frame arranged on the periphery of the body outer wall in a surrounding manner and a parallel bottom wall vertically extending from the bottom of the fixing outer frame, and the parallel bottom wall is attached to the platform part; the parallel diapire of plug mounting corresponds the position department that the plug terminal extended out cuts off and forms the incision in order to dodge the plug terminal, the bottom surface of parallel diapire is equipped with a plurality of welding parts in order to weld in on the plug circuit board.

2. The board-to-board radio frequency plug of claim 1, wherein the fixing frame is provided with first locking portions at four corners.

3. The board-to-board radio frequency plug of claim 1, wherein the plug terminal comprises a first solder leg extending from below the cutout and a first U-shaped contact portion bent from an end of the first solder leg, the first U-shaped contact portion being fastened to the outside of the island portion, the first U-shaped contact portion comprising two contact portions located on an outer surface of the vertical portion of the island portion.

4. The board-to-board radio frequency plug according to any one of claims 1 to 3, wherein the plug circuit board includes a first board body, a plurality of plug signal lines disposed on the first board body, and a plurality of plug ground lines disposed between two adjacent plug signal lines, the plug signal lines include a first segment portion connected to a central conductor of the coaxial line, a second segment portion, and a connecting segment portion connecting the first segment portion and the second segment portion, a width of the connecting segment portion gradually decreases from the first segment portion toward the second segment portion, and the plug terminals are respectively connected to the plug ground lines and the second segment portion of the plug signal lines.

5. The board-to-board radio frequency plug of claim 4, wherein the overall width of the plug signal lines and the plug ground lines in the first section region is greater than the overall width of the plug signal lines and the plug ground lines in the second section region, and each plug signal line has a plug ground line on both sides thereof, the plug ground lines extending along the shape of the plug signal lines.

6. The board-to-board radio frequency plug according to any one of claims 1 to 3, wherein the plugging direction of the board-to-board radio frequency plug is perpendicular to the plane of the plug circuit board, and the central conductor of the coaxial line is soldered on the plug signal line of the plug circuit board in parallel.

7. The utility model provides a board is to board type radio frequency socket, its characterized in that includes socket circuit board, socket ontology, arranges in socket ontology is last and weld in socket fixing spare and socket terminal on the socket circuit board, socket ontology includes the body bottom plate, certainly the body bottom plate upwards integrative rail that extends formation, set up in butt joint chamber in the rail and certainly the body bottom plate outwards extends the bottom plate extension that forms, socket fixing spare integrated into one piece in on the bottom plate extension, socket fixing spare include frame construction and certainly the welding part that forms is extended to frame construction's bottom, socket ontology's rail with be formed with the holding clearance between the frame construction.

8. The board-to-board radio frequency receptacle of claim 7, wherein the receptacle body further comprises a terminal slot extending through the body base plate and communicating with the docking cavity, the receptacle terminal being inserted into the terminal slot from the bottom of the body base plate.

9. The board-to-board rf socket according to claim 7, wherein the frame structure is cut to form a notch corresponding to the position where the socket terminal extends out of the socket body, and the frame structure is provided with second locking portions at four corners.

10. The board-to-board rf socket according to claim 7, wherein the socket terminal comprises a second solder leg, a second U-shaped contact portion formed by bending one end of the second solder leg a plurality of times, and an end portion formed by bending the end of the second U-shaped contact portion in the opposite direction, and the second U-shaped contact portion comprises two contact portions located on two opposite inner side wall surfaces of the mating cavity.

11. The board-to-board rf socket according to claim 10, wherein the second U-shaped contact portion has a gap with the socket body to make the second U-shaped contact portion elastic.

12. The board-to-board rf socket according to any one of claims 7 to 11, wherein the socket circuit board includes a base and a plurality of socket signal lines and socket ground lines formed on the base for soldering the socket terminals, each socket signal line is provided with the socket ground line on both sides thereof, the socket signal line includes a soldering region for soldering with the socket terminal and an extension region extending from the soldering region, and the width of the extension region gradually increases toward a direction away from the soldering region.

13. The board-to-board rf socket according to any one of claims 7 to 11, wherein the plugging direction of the board-to-board rf socket and the docking plug is perpendicular to the socket circuit board.

14. A board-to-board radio frequency connector assembly is characterized by comprising a socket, a plug butted with the socket and a coaxial line connected to the plug, wherein the socket comprises a socket circuit board, a socket body, a socket fixing piece and a socket terminal, the socket fixing piece and the socket terminal are arranged on the socket body and welded on the socket circuit board; the plug comprises a plug body, a plurality of plug terminals arranged in the plug body, a plug fixing piece arranged around the periphery of the plug body, a coaxial line and a plug circuit board used for connecting the plug terminals and the coaxial line, wherein the plug body comprises a body base, a body outer wall integrally extending upwards from the periphery of the body base, an island part integrally extending upwards from the middle of the body base and an inserting space formed between the body outer wall and the island part, the periphery of the body base outwards extends to form a platform part, the plug fixing piece comprises a fixed outer frame arranged around the periphery of the body outer wall and a parallel bottom wall vertically extending from the bottom of the fixed outer frame, the parallel bottom wall is attached to the platform part, when the plug is inserted on the socket, the island part of the plug is contained in the butt joint cavity of the socket, the fence of the socket is contained in the inserting space on the periphery of the island, the outer wall of the body of the plug and the fixed outer frame are inserted in the containing gap, and the plug fixing piece and the socket fixing piece are mutually electrically conducted to form a shielding passage.

15. The board-to-board rf connector assembly of claim 14, wherein the plug terminal comprises a first solder leg and a first U-shaped contact portion bent from one end of the first solder leg, the first U-shaped contact portion being fastened to the outside of the island portion, the first U-shaped contact portion comprising two contact portions located on the outer surface of the vertical portion of the island portion; the socket terminal comprises a second welding leg, a second U-shaped contact part formed by bending one end of the second welding leg for multiple times and an end part formed by reversely bending the tail end of the second U-shaped contact part, and the second U-shaped contact part comprises two contact parts positioned on two opposite inner side wall surfaces of the butt joint cavity; the second U-shaped contact part is in buckling contact with the first U-shaped contact part.