CN106159504B - Compact radio frequency coaxial connector - Google Patents
Compact radio frequency coaxial connector Download PDFInfo
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- CN106159504B CN106159504B CN201510185166.XA CN201510185166A CN106159504B CN 106159504 B CN106159504 B CN 106159504B CN 201510185166 A CN201510185166 A CN 201510185166A CN 106159504 B CN106159504 B CN 106159504B
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- inner conductor
- coaxial connector
- radio frequency
- frequency coaxial
- insulating support
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- 239000004020 conductor Substances 0.000 claims abstract description 127
- 239000012212 insulator Substances 0.000 claims abstract description 21
- 238000013461 design Methods 0.000 abstract description 10
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
The invention provides a compact radio frequency coaxial connector, which comprises a main connecting part and a central needle which are matched with each other; the main connecting part comprises an insulating support, a first inner conductor is fixed in the middle of the insulating support, one end of the first inner conductor is connected with a second inner conductor, an insulator is fixed at one end, far away from the first inner conductor, of the second inner conductor, a guide hole is formed in the insulator, and one end, with the insulator, of the second inner conductor can rotate relative to the first inner conductor; the central needle can be fixedly connected to the connecting plate, the central needle can penetrate through the guide hole to be connected with the second inner conductor, and the diameter of the guide hole is gradually increased along the direction far away from the second inner conductor. The compact radio frequency coaxial connector abandons the traditional three-body board-to-board connection mode, adopts the movable connection of the central needle to provide radial and axial tolerance, reduces the product quantity, reduces the product cost and realizes compact design.
Description
Technical Field
The invention relates to a compact radio frequency coaxial connector.
Background
The current base station designs tend to be increasingly miniaturized, and RRUs also tend to be more compact, easier to install, and less costly in communication equipment manufacturers. Therefore, for the board-to-board connector, it is necessary to achieve a more compact connection for the purpose of transmitting power and signals, while providing a larger axial and radial offset, and a blind-mate function.
In the design of the connection of the board to the filter, due to manufacturing and assembling errors, a certain horizontal position tolerance and a certain vertical position tolerance exist between the board to the filter and a part of the radio frequency coaxial connector which needs to be inserted into the board to the filter, and the problem reflected on the radio frequency coaxial connector is the radial tolerance and the axial tolerance, namely the radial tolerance and the axial tolerance allowed when the radio frequency coaxial connector is connected with the board to the filter. However, the existing rf coaxial connection technology mostly adopts a three-body design of socket-adapter-socket, so the number of rf coaxial connections of the board to the filter cannot be too large, and thus the development of the board to filter connection technology and modularization is greatly influenced.
The existing board-to-board connection mainly adopts SMP-MAX product series (such as MMBX) in the special CN 101330181A, and the design of the product uses a socket-adaptor-socket three-body structure, so that the larger offset can be allowed. However, due to the three-body structure, each connector uses a housing, which is not only costly, but also cannot be integrated into the cavity of the filter, which is not conducive to the miniaturization design of the RRU.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a compact rf coaxial connector, which is used to solve the problems of the prior art that the coaxial connector of the three-body design is bulky, high in cost, and unable to be integrated into the cavity of the filter.
To achieve the above and other related objects, the present invention provides a compact rf coaxial connector, which includes a main connecting portion and a center pin that are engaged with each other; the main connecting part comprises an insulating support, a first inner conductor is fixed in the middle of the insulating support, one end of the first inner conductor is connected with a second inner conductor, an insulator is fixed at one end, far away from the first inner conductor, of the second inner conductor, a guide hole is formed in the insulator, and one end, with the insulator, of the second inner conductor can rotate relative to the first inner conductor; the central needle can be fixedly connected to the connecting plate, the central needle can penetrate through the guide hole to be connected with the second inner conductor, and the diameter of the guide hole is gradually increased along the direction far away from the second inner conductor.
Preferably, one end of the first inner conductor, which is matched with the second inner conductor, is provided with a connecting notch which is inwards recessed along the axial direction, and one end of the second inner conductor, which is matched with the first inner conductor, is provided with a connecting socket which can be inserted into the connecting notch.
Further preferably, the connection socket is provided with a plurality of elastic pieces scattered outwards along the circumferential direction. Further preferably, the resilient piece is provided with a first flange extending in a circumferential direction facing an inner wall of the coupling recess, the first flange being in contact with the inner wall of the coupling recess when the coupling socket is inserted into the coupling recess. Still further preferably, the inner wall of the connection recess is further provided with a limit groove corresponding to the first flange, and when the connection socket is inserted into the connection recess, the first flange moves in the limit groove.
Preferably, the surface of the first inner conductor, which is in contact with the insulating support, is provided with a protruding positioning protrusion, the surface of the insulating support, which is in contact with the first inner conductor, is provided with a positioning notch matched with the positioning protrusion, and when the first inner conductor and the insulating support are relatively fixed, the positioning protrusion is clamped into the positioning notch.
Preferably, the end of the second inner conductor facing the center pin is provided with a center pin socket into which the center pin can be inserted through the guide hole. Further preferably, the inner wall of the central needle socket is provided with a second flange projecting inwardly, the second flange contacting the central needle when the central needle is inserted into the central needle socket.
Preferably, the main connecting portion is further provided with an outer conductor, the insulating support, the first inner conductor, the second inner conductor and the insulator are all located inside the outer conductor, and the insulating support and the outer conductor are fixed relatively. Preferably, the outer conductor is provided with an elastic connection protrusion on one surface facing the connection plate, and the elastic connection protrusion is in contact with the connection plate when the center pin is connected with the second inner conductor.
As described above, the compact rf coaxial connector of the present invention has the following advantages:
the compact radio frequency coaxial connector abandons the traditional three-body board-to-board connection mode, adopts the movable connection of the central needle to provide radial and axial tolerance, reduces the product quantity, reduces the product cost and realizes compact design.
Drawings
Fig. 1a is a schematic structural diagram of a first embodiment of the compact rf coaxial connector according to the present invention.
Fig. 1b shows an enlarged schematic view of the compact rf coaxial connector shown in fig. 1 a.
Fig. 1c shows an enlarged schematic view of the compact rf coaxial connector shown in fig. 1 a.
Fig. 2a is a schematic unplugged structure of a second embodiment of the compact rf coaxial connector of the present invention.
Fig. 2b is a schematic diagram of the compact rf coaxial connector shown in fig. 2a after being plugged.
Fig. 2c is an enlarged schematic view of the compact rf coaxial connector shown in fig. 2 a.
Fig. 3a is a schematic structural diagram of a third embodiment of the compact rf coaxial connector according to the present invention.
Fig. 3b is a schematic diagram of the compact rf coaxial connector shown in fig. 3a placed in a filter cavity.
Description of the element reference numerals
1 main connection part
11 insulating support
111 locating notch
112 snap-fit recess
12 first inner conductor
121 connection notch
122 positioning projection
123 limit groove
13 second inner conductor
131 connecting socket
132 spring piece
133 first flange
134 center pin socket
135 second flange
136 inner conductor step
14 insulator
141 pilot hole
142 insulator step
15 outer conductor
151 elastic connection protrusion
152 upper portion of the outer conductor
153 lower part of outer conductor
154 limiting surface
155 clamping bulge
2 center needle
3 connecting plate
4 filter cavity
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1a to fig. 3 b. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1a to 3b, the compact rf coaxial connector of the present invention comprises a main connecting portion 1 and a center pin 2 which are engaged with each other; the main connecting part 1 comprises an insulating support 11, a first inner conductor 12 is fixed in the middle of the insulating support 11, one end of the first inner conductor 12 is connected with a second inner conductor 13, an insulator 14 is fixed at one end, far away from the first inner conductor 12, of the second inner conductor 13, a guide hole 141 is formed in the insulator 14, and one end, with the insulator 14, of the second inner conductor 13 can rotate relative to the first inner conductor 12; the center pin 2 can be fixedly connected to the connecting plate 3, the center pin 2 can be connected to the second inner conductor 13 through the guide hole 141, and the diameter of the guide hole 141 is gradually increased in a direction away from the second inner conductor 13. The central needle 2 can be directly welded on the connecting plate 3, or an insertion hole can be arranged on the connecting plate 3, and the central needle 2 is pressed into the insertion hole to achieve the effect of fixedly connecting with the connecting plate 3.
The end of the first inner conductor 12 of the main connecting part 1 far away from the second inner conductor 13 is connected with a device to be connected, such as a filter, a circuit board and the like, and the end of the central needle 2 far away from the connecting plate 3 is connected with the second inner conductor 13, so that the device to be connected is connected with the connecting plate 3. Since the guide hole 141 is shaped like a bell mouth, even if the device to be connected has a slight error in the radial or axial direction from the connection plate 3, the center pin 2 can be inserted into the second inner conductor 13 through the guide hole 141; and the second inner conductor 13 can have certain activity with the connection end of first inner conductor 12 for first inner conductor 12, and when second inner conductor 13 is connected with centre needle 2 like this, second inner conductor 13 can incline certain angle, reaches the purpose that can also guarantee good radio frequency performance even have radial or axial skew between the equipment of treating the connection and connecting plate 3. The insulator 14 with the guiding hole 141 similar to the bell mouth can not only realize the blind-mate function, but also provide protection for the center pin 2 because the friction coefficient of the insulator 14 is lower than that of metal, so that the center pin 2 is not easily damaged in work.
The specific connection structure of the first inner conductor 12 and the second inner conductor 13 is shown in fig. 1b, wherein a connection recess 121 which is recessed inwards along the axial direction is arranged at one end where the first inner conductor 12 and the second inner conductor 13 are matched, and a connection socket 131 is arranged at one end where the second inner conductor 13 and the first inner conductor 12 are matched, and the connection socket 131 can be inserted into the connection recess 121.
The connection socket 131 may be further provided with a plurality of resilient pieces 132 scattered outward in a circumferential direction. To further ensure good contact, the resilient piece 132 is provided with a circumferentially extending first flange 133 facing the inner wall of the connection recess 121, the first flange 133 being in contact with the inner wall of the connection recess 121 when the connection socket 131 is inserted into the connection recess 121. The inner wall of the connection recess 121 may be further provided with a stopper groove 123 corresponding to the first flange 133, and the first flange 133 moves in the stopper groove 123 when the connection socket 131 is inserted into the connection recess 121. The stopper groove 123 restricts the movable range of the first flange 133, and ensures the connection of the second inner conductor 13 with the first inner conductor 12.
The fixing structure of the first inner conductor 12 and the insulating support 11 is shown in fig. 1 b. The surface of the first inner conductor 12 contacting the insulating support 11 is provided with a protruding positioning protrusion 122, the surface of the insulating support 11 contacting the first inner conductor 12 is provided with a positioning notch 111 matching with the positioning protrusion 122, and when the first inner conductor 12 is fixed relatively to the insulating support 11, the positioning protrusion 122 is snapped into the positioning notch 111.
As shown in fig. 1c, the end of the second inner conductor 13 facing the center pin 2 is provided with a center pin socket 134, and the center pin 2 can be inserted into the center pin socket 134 through the guide hole 141. For better contact of the central pin 2 with the second inner conductor 13, the inner wall of the central pin socket 134 is provided with a second flange 135 protruding inwardly, the second flange 135 being in contact with the central pin 2 when the central pin 2 is inserted into the central pin socket 134.
As shown in fig. 1c, the second inner conductor 13 is further provided with an inner conductor step 136, and the insulator 14 is provided with an insulator step 142, so as to provide compensation for a high impedance place and provide better radio frequency performance.
As shown in fig. 1a to 2c, the main connecting portion 1 further includes an outer conductor 15, the insulating support 11, the first inner conductor 12, the second inner conductor 13, and the insulator 14 are all located inside the outer conductor 15, and the insulating support 11 and the outer conductor 15 are fixed relatively.
Fig. 1a to fig. 1c show a first embodiment of the compact rf coaxial connector according to the present invention, wherein the outer conductor 15 is divided into two parts, namely an upper outer conductor part 152 and a lower outer conductor part 153, the insulating support 11 and the first inner conductor 12 are located inside the upper outer conductor part 152, a radial limiting surface 154 is provided inside the lower outer conductor part 153, the upper outer conductor part 152 together with the insulating support 11 and the first inner conductor 12 is inserted into the lower outer conductor part 153, the upper outer conductor part 152 and the lower outer conductor part 153 are fixed relatively, the lower surface of the insulating support 11 is located on the limiting surface 154 of the lower outer conductor part 153, and the upper surface and the outer circumferential surface of the insulating support 11 are matched with the upper outer conductor part 152, so that the insulating support 11 and the outer conductor 15 are fixed relatively.
Fig. 2a to 2c show a second embodiment of the compact rf coaxial connector of the present invention, wherein the outer conductor 15 is a whole, and the insulating support 11 and the outer conductor 15 are fixed relatively by the engaging recesses 112 and the engaging protrusions 155. As shown in fig. 2c, the surface of the insulating support 11, which is matched with the outer conductor 15, is provided with a clamping recess 112, the surface of the outer conductor 15, which is matched with the insulating support 11, is provided with a clamping protrusion 155, and the insulating support 11 and the outer conductor 15 are fixed by clamping the clamping protrusion 155 into the clamping recess 112.
In both embodiments, the outer conductor 15 has an elastic connection protrusion 151 on its surface facing the connection plate 3, and when the center pin 2 is connected to the second inner conductor 13, the elastic connection protrusion 151 contacts the connection plate 3. The elastic coupling protrusion 151 may ensure good contact between the outer conductor 15 and the connection plate 3.
As shown in fig. 3a to 3b, a third embodiment of the compact rf coaxial connector of the present invention is provided, and the rf coaxial connector does not need the outer conductor 15, and the rf coaxial connector is directly and integrally disposed in the filter cavity 4, so that the cost can be greatly reduced, and the compact design of the rf coaxial connector is facilitated.
The compact radio frequency coaxial connector can selectively use the outer conductor, can allow large axial (at least +/-0.7 mm) and radial (+/-4.8) deviation, has good radio frequency performance (VSWR <1.2 at DG-3 GHz), and can realize a blind plugging function.
In conclusion, the compact radio frequency coaxial connector provided by the invention abandons the traditional three-body board-to-board connection mode, adopts the movable connection of the central needle to provide radial and axial tolerance, reduces the product quantity, reduces the product cost and realizes compact design. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A compact radio frequency coaxial connector, characterized by: the needle comprises a main connecting part (1) and a central needle (2) which are matched with each other; the main connecting part (1) comprises an insulating support (11), the middle part of the insulating support (11) clamps the middle part of a first inner conductor (12), a connecting notch (121) at one end of the first inner conductor (12) is connected with a second inner conductor (13), one end of the second inner conductor is detachably clamped and embedded in the connecting notch, an insulator (14) is fixed at one end, far away from the first inner conductor (12), of the second inner conductor (13), a guide hole (141) is formed in the insulator (14), and one end, provided with the insulator (14), of the second inner conductor (13) can rotate relative to the first inner conductor (12); the central needle (2) can be fixedly connected to the connecting plate (3), the central needle (2) can penetrate through the guide hole (141) to be connected with the second inner conductor (13), and the diameter of the guide hole (141) is gradually increased along the direction far away from the second inner conductor (13).
2. The compact radio frequency coaxial connector of claim 1, wherein: the end, matched with the second inner conductor (13), of the first inner conductor (12) is provided with the connecting notch (121) which is inwards recessed along the axial direction, the end, matched with the first inner conductor (12), of the second inner conductor (13) is provided with a connecting socket (131), and the connecting socket (131) can be inserted into the connecting notch (121).
3. The compact radio frequency coaxial connector of claim 2, wherein: the connecting socket (131) is provided with a plurality of elastic sheets (132) which are scattered outwards along the circumferential direction.
4. The compact radio frequency coaxial connector of claim 3, wherein: the elastic sheet (132) is provided with a first flange (133) extending along the circumferential direction and facing the inner wall of the connecting notch (121), and when the connecting socket (131) is inserted into the connecting notch (121), the first flange (133) is contacted with the inner wall of the connecting notch (121).
5. The compact radio frequency coaxial connector of claim 4, wherein: the inner wall of the connecting notch (121) is also provided with a limiting groove (123) corresponding to the first flange (133), and when the connecting socket (131) is inserted into the connecting notch (121), the first flange (133) moves in the limiting groove (123).
6. The compact radio frequency coaxial connector of claim 1, wherein: the surface that first inner conductor (12) and insulating support (11) contact is equipped with convex location arch (122), the surface that insulating support (11) and first inner conductor (12) contact be equipped with location arch (122) matched with location notch (111), when first inner conductor (12) and insulating support (11) are fixed relatively, location arch (122) card is gone into in location notch (111).
7. The compact radio frequency coaxial connector of claim 1, wherein: one end of the second inner conductor (13) facing the center pin (2) is provided with a center pin socket (134), and the center pin (2) can be inserted into the center pin socket (134) through the guide hole (141).
8. The compact radio frequency coaxial connector of claim 7, wherein: the inner wall of the central needle socket (134) is provided with a second flange (135) protruding inwards, and when the central needle (2) is inserted into the central needle socket (134), the second flange (135) is in contact with the central needle (2).
9. The compact radio frequency coaxial connector according to any one of claims 1 to 8, wherein: the main connecting portion (1) is further provided with an outer conductor (15), the insulating support (11), the first inner conductor (12), the second inner conductor (13) and the insulator (14) are located inside the outer conductor (15), and the insulating support (11) and the outer conductor (15) are fixed relatively.
10. The compact radio frequency coaxial connector of claim 9, wherein: and one surface of the outer conductor (15) facing the connecting plate (3) is provided with an elastic connecting protrusion (151), and when the central needle (2) is connected with the second inner conductor (13), the elastic connecting protrusion (151) is in contact with the connecting plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510185166.XA CN106159504B (en) | 2015-04-17 | 2015-04-17 | Compact radio frequency coaxial connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510185166.XA CN106159504B (en) | 2015-04-17 | 2015-04-17 | Compact radio frequency coaxial connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106159504A CN106159504A (en) | 2016-11-23 |
| CN106159504B true CN106159504B (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510185166.XA Active CN106159504B (en) | 2015-04-17 | 2015-04-17 | Compact radio frequency coaxial connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106159504B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106887734B (en) * | 2017-02-14 | 2019-03-12 | 深圳市华领科技有限公司 | Blindmate type radio frequency (RF) coaxial connector |
| CN110119011B (en) * | 2018-02-07 | 2021-09-07 | 深圳市创鑫激光股份有限公司 | Laser lens, laser output head with laser lens and laser |
| CN109728458B (en) * | 2018-07-13 | 2023-09-26 | 上海雷迪埃电子有限公司 | Hybrid radio frequency connector |
| CN110854578B (en) * | 2018-07-24 | 2022-03-25 | 中兴通讯股份有限公司 | Connecting device |
| CN109616789B (en) * | 2018-11-12 | 2020-03-17 | 东莞市鼎通精密五金股份有限公司 | Connector for differential transmission |
| CN110323598B (en) * | 2019-07-11 | 2020-08-04 | 上海航天科工电器研究院有限公司 | Floating structure for connecting socket and PCB |
| CN111200213A (en) * | 2020-02-28 | 2020-05-26 | 苏州华旃航天电器有限公司 | Connector between radio frequency coaxial boards |
| CN114094390A (en) * | 2021-11-11 | 2022-02-25 | 深圳国人科技股份有限公司 | Large-tolerance blind-mate connector and cavity filter |
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|---|---|---|---|---|
| GB678392A (en) * | 1950-01-10 | 1952-09-03 | British Insulated Callenders | Improvements in or relating to detachable two-part electric cable couplings |
| US6497579B1 (en) * | 1999-03-02 | 2002-12-24 | Huber+Suhner Ag | Coaxial connection with a tiltable adapter for a printed circuit board |
| CN102946033A (en) * | 2012-11-15 | 2013-02-27 | 华为技术有限公司 | Radio frequency coaxial connector |
| CN103392266A (en) * | 2011-03-08 | 2013-11-13 | 胡贝尔和茹纳股份公司 | High frequency coaxial connector |
| CN104303377A (en) * | 2012-04-05 | 2015-01-21 | 胡贝尔舒纳公司 | Printed circuit board coaxial connector |
-
2015
- 2015-04-17 CN CN201510185166.XA patent/CN106159504B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB678392A (en) * | 1950-01-10 | 1952-09-03 | British Insulated Callenders | Improvements in or relating to detachable two-part electric cable couplings |
| US6497579B1 (en) * | 1999-03-02 | 2002-12-24 | Huber+Suhner Ag | Coaxial connection with a tiltable adapter for a printed circuit board |
| CN103392266A (en) * | 2011-03-08 | 2013-11-13 | 胡贝尔和茹纳股份公司 | High frequency coaxial connector |
| CN104303377A (en) * | 2012-04-05 | 2015-01-21 | 胡贝尔舒纳公司 | Printed circuit board coaxial connector |
| CN102946033A (en) * | 2012-11-15 | 2013-02-27 | 华为技术有限公司 | Radio frequency coaxial connector |
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| CN106159504A (en) | 2016-11-23 |
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