EP1303005A1 - Inner conductor system - Google Patents
Inner conductor system Download PDFInfo
- Publication number
- EP1303005A1 EP1303005A1 EP01124083A EP01124083A EP1303005A1 EP 1303005 A1 EP1303005 A1 EP 1303005A1 EP 01124083 A EP01124083 A EP 01124083A EP 01124083 A EP01124083 A EP 01124083A EP 1303005 A1 EP1303005 A1 EP 1303005A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connector
- cable
- end portion
- inner conductor
- conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
- H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
- H01R9/0521—Connection to outer conductor by action of a nut
Definitions
- the present invention relates to connectors for coaxial cables of the kind set forth in the preamble of claim 1 and more particularly to the connection between the inner conductor of the coaxial cable and the centre terminal of the coaxial connector.
- EP 0 994 527 with the same applicant as the present application discloses a coaxial connector provided with threads on the contact surface between the inner conductor of the cable and the centre terminal as mentioned above.
- US 5,595,502 discloses a connector for a coaxial cable having hollow inner conductor, where the centre terminal of the connector during mounting of the cable on the connector is brought into the hollow inner conductor, and where the portion of the centre terminal inserted into the inner conductor is furthermore provided with threads engaging the inner surface of the hollow conductor.
- the object of the present invention to provide a connector for a coaxial cable which ensures a firm and reliable electrical and mechanical contact between the inner connector of the cable and the centre terminal of the connector without giving rise to the degradations of signal propagation at the interface between the inner conductor and the centre terminal as described initially.
- a connector for a coaxial cable essentially comprising an outer bushing for providing an axial displacement of parts in the connector, whereby these parts are brought into mechanical and electrical engagement with the coaxial cable, the axial displacement being provided by screwing a thread provided on said bushing onto a corresponding thread provided on the main body of the connector, the connector being furthermore provided with a centre terminal attached to the main body of the connector via a tubular member and comprising an end portion for connection to the inner conductor of the cable, said end portion being provided with engagement means for engagement with corresponding engagement means provided on a tubular body coaxially and displaceably mounted in the connector, and where said end portion is a tubular body longitudinally provided with a number of slits facilitating the axial compression of the end portion around the inner conductor of the cable, and where the connector is furthermore characterised in that said end portion on the inner circumferential surface hereof is provided with an annular contact surface longitudinally extending over a predefined distance and protruding radially in
- a connector for a coaxial cable essentially comprising a tubular main body 1 upon which a tubular outer bushing 2 can be screwed by means of appropriate threads provided on the outer surface of a portion of the main body and a corresponding inner surface of the outer bushing thus providing the possibility to displace the main body and the outer bushing relative to each other as mentioned in the description of prior art.
- One effect of providing said displacement between the main body (1) and the outer bushing (2) is that the axially displaceable part 5 surrounding the inner conductor 10 of the cable will be displaced in the direction towards the centre terminal 3 as indicated by the arrow A in the Figure. Due to the engagement between the conical face 11 of the displaceable part 5 and a corresponding conical face 12 on the end portion 3' of the centre terminal 3, the end portion 3' will be pressed radially inwards towards the inner conductor 10, the end portion 3' being axially retained by engagement with a tubular member 6 by means of which member the centre terminal 3 of the connector is furthermore attached to the main body 1.
- the end portion 3' of the centre terminal 3 is formed as a tubular member of an inner diameter that over the major longitudinal length of the end portion 3' is somewhat larger than the diameter of the inner connector 10 of the coaxial cable.
- the inner conductor 10 is inserted into this tubular member approximately as shown in Figure 1.
- the tubular member is provided with a plurality of longitudinally extending slits 15, typically 4 slits, although other numbers could also be used. The presence of these slits 15 facilitates the inwardly directed compression of the end portion 3' around the inner conductor 10.
- the tubular member is on the inner circumferential surface hereof provided with an annular protruding contact area 14 encircling the inner conductor 10.
- the inner diameter of this protruding contact area 14 is chosen such that it is possible during mounting of the connector on the cable to pass the inner conductor 10 longitudinally through this contact area 14 and further into the tubular member to a final position as for instance indicated in Figure 1.
- the insertion of the inner conductor 10 of the cable into the end portion 3' is furthermore facilitated by the presence of the inclined end face 17 on the end portion 3'.
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Communication Cables (AREA)
- Waveguides (AREA)
Abstract
Description
- The present invention relates to connectors for coaxial cables of the kind set forth in the preamble of claim 1 and more particularly to the connection between the inner conductor of the coaxial cable and the centre terminal of the coaxial connector.
- In connectors of the above kind it is known to obtain mechanically and electrically stable connections between the inner- and outer conductor of the coaxial cable and the corresponding inner- (or centre-) terminal and main body of the connector. These stable connections are typically brought about by appropriate axial displacements of the various parts of the connector relative to each other such that these displacements are transformed into corresponding inwardly directed radial displacements of contact surfaces of the connector exerting a sufficiently strong pressure against the corresponding inner- and outer conductors of the cable. In order to obtain reliable electrical and mechanical connections, these contact surfaces are furthermore often provided with appropriate threads or protrusions, which may penetrate the surface of the inner conductor, thereby contributing to increased reliability of the connections.
- A number of such connectors are known within the art. Specifically EP 0 994 527 with the same applicant as the present application discloses a coaxial connector provided with threads on the contact surface between the inner conductor of the cable and the centre terminal as mentioned above.
- Furthermore, US 5,595,502 discloses a connector for a coaxial cable having hollow inner conductor, where the centre terminal of the connector during mounting of the cable on the connector is brought into the hollow inner conductor, and where the portion of the centre terminal inserted into the inner conductor is furthermore provided with threads engaging the inner surface of the hollow conductor.
- In US 6,120,314 there is disclosed a plug connector for the electrically conductive connection of conductor tracks on a board to at least one coaxial cable where the connector is provided with an insertion duct comprising two tubular sections being able to accommodate the inner- and outer conductor of a coaxial cable, respectively. These sections are both provided with inwardly directed protrusions which during mounting of the cable in the connector are brought to penetrate the insulation material around the inner- and outer conductors, respectively, and exert a strong pressure against the surface of the corresponding conductor.
- While the arrangement of protrusions of threads as exemplified by the above disclosures undoubtedly leads to a more stable mechanical attachment of the respective conductor of the cable to the corresponding conductor in the connector, such arrangements may nevertheless be undesirable as they may lead to a deterioration of the transmission of high frequency signals at the contact surfaces between the cable and the connector, especially at the interface between the inner conductor of the cable and the corresponding centre terminal of the connector. This is due to the fact that the inner conductor of many known coaxial cables is formed by for instance an aluminium core which is provided with a very thin cladding of another conductive material such as copper. At high frequencies the signal current practically takes place only through the very thin cladding due to the skin effect; and local destructions of this cladding caused by the penetration of said threads or protrusions lead to local impedance discontinuities, which tend to degrade signal transmission. It is hence desirable to provide attachment means, especially between the inner conductor of the cable and the centre terminal of the conductor that attains said high stability and reliability of connection without introducing the degradation of the electrical signal as described above.
- Based on the problems described above it is the object of the present invention to provide a connector for a coaxial cable which ensures a firm and reliable electrical and mechanical contact between the inner connector of the cable and the centre terminal of the connector without giving rise to the degradations of signal propagation at the interface between the inner conductor and the centre terminal as described initially.
- This object is attained with a coaxial connector according to the characterising clause of claim 1.
- According to the present invention there is thus provided a connector for a coaxial cable essentially comprising an outer bushing for providing an axial displacement of parts in the connector, whereby these parts are brought into mechanical and electrical engagement with the coaxial cable, the axial displacement being provided by screwing a thread provided on said bushing onto a corresponding thread provided on the main body of the connector, the connector being furthermore provided with a centre terminal attached to the main body of the connector via a tubular member and comprising an end portion for connection to the inner conductor of the cable, said end portion being provided with engagement means for engagement with corresponding engagement means provided on a tubular body coaxially and displaceably mounted in the connector, and where said end portion is a tubular body longitudinally provided with a number of slits facilitating the axial compression of the end portion around the inner conductor of the cable, and where the connector is furthermore characterised in that said end portion on the inner circumferential surface hereof is provided with an annular contact surface longitudinally extending over a predefined distance and protruding radially inwardly from said inner circumferential surface to establishment of a firm and reliable electrical and mechanical contact between the centre terminal and the inner conductor of the coaxial cable.
- The invention will now be described in more detail with reference to the accompanying drawings, in which:
- Figure 1 is a longitudinal cross-sectional view through a connector according to the invention;
- Figure 2 is a detailed view showing a part of the interface between the centre terminal of the connector and the inner conductor of the cable; and
- Figure 3 is a perspective view of a detail of the centre terminal shown in Figures 1 and 2.
-
- In the following, a detailed description of an embodiment of the invention is given.
- With reference to Figure 1a there is shown a connector for a coaxial cable essentially comprising a tubular main body 1 upon which a tubular
outer bushing 2 can be screwed by means of appropriate threads provided on the outer surface of a portion of the main body and a corresponding inner surface of the outer bushing thus providing the possibility to displace the main body and the outer bushing relative to each other as mentioned in the description of prior art. - One effect of providing said displacement between the main body (1) and the outer bushing (2) is that the axially
displaceable part 5 surrounding theinner conductor 10 of the cable will be displaced in the direction towards thecentre terminal 3 as indicated by the arrow A in the Figure. Due to the engagement between theconical face 11 of thedisplaceable part 5 and a correspondingconical face 12 on the end portion 3' of thecentre terminal 3, the end portion 3' will be pressed radially inwards towards theinner conductor 10, the end portion 3' being axially retained by engagement with atubular member 6 by means of which member thecentre terminal 3 of the connector is furthermore attached to the main body 1. - With reference to Figures 2 and 3, the end portion 3' of the
centre terminal 3 according to this embodiment of the invention will be described in detail in the following. The end portion 3' is formed as a tubular member of an inner diameter that over the major longitudinal length of the end portion 3' is somewhat larger than the diameter of theinner connector 10 of the coaxial cable. During mounting of the connector on the cable, theinner conductor 10 is inserted into this tubular member approximately as shown in Figure 1. The tubular member is provided with a plurality of longitudinally extendingslits 15, typically 4 slits, although other numbers could also be used. The presence of theseslits 15 facilitates the inwardly directed compression of the end portion 3' around theinner conductor 10. At that end of said end portion 3' facing the coaxial cable, i.e. to the right in Figures 1 and 2, the tubular member is on the inner circumferential surface hereof provided with an annularprotruding contact area 14 encircling theinner conductor 10. The inner diameter of this protrudingcontact area 14 is chosen such that it is possible during mounting of the connector on the cable to pass theinner conductor 10 longitudinally through thiscontact area 14 and further into the tubular member to a final position as for instance indicated in Figure 1. The insertion of theinner conductor 10 of the cable into the end portion 3' is furthermore facilitated by the presence of theinclined end face 17 on the end portion 3'. - When the connector is mounted on the cable, the above described longitudinal displacement of the axially
displaceable part 5 over the end of the end portion 3' will result in thecontact surface 14 being pressed against theinner conductor 10 of the cable, thereby depressing the surface of theinner conductor 10, however, without thecontact surface 14 penetrating a coating present on the outer circumferential surface of theinner conductor 10. Thus, a firm and reliable electrical and mechanical contact between thecentre terminal 3 and theinner conductor 10 can be established without the risk of interfering with the high frequency signal propagation from theinner conductor 10 to thecentre terminal 3 as described initially. Furthermore, the presence of theback face 16 of thecontact area 14 provides a firm grip on the inner conductor, if it is for instance attempted to pull the connector off the cable. - Although one embodiment of the present invention has been shown and described in the preceding parts of the detailed description, it is understood that a person skilled in the art may conceive other embodiments of the invention without departing from the scope of the invention as defined by the following claims.
-
- 1. Main body of connector
- 2. Outer bushing of connector
- 3. Centre terminal of connector
- 3' End portion of centre terminal
- 4. Ferrule
- 5. Axially displaceable part
- 6. Tubular member
- 7. Jacket of cable
- 8. Outer conductor of cable
- 9. Dielectric of cable
- 10. Inner conductor of cable
- 11. First conical face
- 12. Second conical face
- 13. Inner circumferential surface of end portion
- 14. Contact area
- 15. Longitudinal slit
- 16. Back face of contact area
- 17. Inclined end face of contact area
-
Claims (4)
- Connector for a coaxial cable comprising a bushing (2) for providing an axial displacement of parts in the connector, whereby these parts are brought into mechanical and electrical engagement with the coaxial cable, the axial displacement being provided by screwing a thread provided on the bushing (2) onto a corresponding thread provided on the main body (1) of the connector, the connector being furthermore provided with a centre terminal (3) attached to a tubular member (6) and comprising an end portion (3') for connection to the inner conductor (10) of the cable, said end portion (3') being provided with engagement means (12) for engagement with corresponding engagement means (11) provided on a tubular body (5) coaxially and displaceably mounted in the connector, and where said end portion (3') is a tubular body longitudinally provided by a number of slits (15), characterised in that said end portion (3') on the inner circumferential surface (13) hereof being provided with an annular contact surface (14) longitudinally extending over a predefined distance (d) and protruding radially inwardly from said inner circumferential surface (13).
- Connector according to claim 1, characterised in that said annular contact surface (14) is substantially cylindrical.
- Connector according to claim 1, characterised in that said annular contact surface (14) on one longitudinal end hereof is provided with an inclined end face (17).
- Connector according to claim 1, characterised in that said annular contact surface (14) on one longitudinal end hereof is provided with a radially inwardly extending back face (16).
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT01124083T ATE290724T1 (en) | 2001-10-10 | 2001-10-10 | INNER CONDUCTOR ARRANGEMENT |
ES01124083T ES2239087T3 (en) | 2001-10-10 | 2001-10-10 | SYSTEM FOR INTERNAL DRIVER. |
DK01124083T DK1303005T3 (en) | 2001-10-10 | 2001-10-10 | Inner Conductor System |
EP01124083A EP1303005B1 (en) | 2001-10-10 | 2001-10-10 | Inner conductor system |
DE60109294T DE60109294T2 (en) | 2001-10-10 | 2001-10-10 | Internal conductor arrangement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01124083A EP1303005B1 (en) | 2001-10-10 | 2001-10-10 | Inner conductor system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1303005A1 true EP1303005A1 (en) | 2003-04-16 |
EP1303005B1 EP1303005B1 (en) | 2005-03-09 |
Family
ID=8178904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01124083A Expired - Lifetime EP1303005B1 (en) | 2001-10-10 | 2001-10-10 | Inner conductor system |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1303005B1 (en) |
AT (1) | ATE290724T1 (en) |
DE (1) | DE60109294T2 (en) |
DK (1) | DK1303005T3 (en) |
ES (1) | ES2239087T3 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005027273A1 (en) * | 2003-09-09 | 2005-03-24 | Commscope, Inc. Of North Carolina | Coaxial connector with enhanced insulator member and associated methods |
WO2006001999A1 (en) * | 2004-06-15 | 2006-01-05 | Corning Gilbert Inc. | Coaxial connector with center conductor seizure |
US7077700B2 (en) | 2004-12-20 | 2006-07-18 | Corning Gilbert Inc. | Coaxial connector with back nut clamping ring |
US7189114B1 (en) | 2006-06-29 | 2007-03-13 | Corning Gilbert Inc. | Compression connector |
US7261581B2 (en) | 2003-12-01 | 2007-08-28 | Corning Gilbert Inc. | Coaxial connector and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1905182A1 (en) * | 1969-02-03 | 1970-09-17 | Kathrein Werke Anton Katrein | Quick connection for coaxial cable |
US3836946A (en) * | 1972-03-30 | 1974-09-17 | Siemens Ag | Coaxial connector |
EP1028498A1 (en) * | 1999-02-10 | 2000-08-16 | Spinner GmbH Elektrotechnische Fabrik | Connector for a coaxial cable with a smooth outer conductor |
EP1122835A1 (en) * | 2000-02-04 | 2001-08-08 | Cabel-Con A/S | One piece connector |
-
2001
- 2001-10-10 AT AT01124083T patent/ATE290724T1/en not_active IP Right Cessation
- 2001-10-10 DE DE60109294T patent/DE60109294T2/en not_active Expired - Lifetime
- 2001-10-10 DK DK01124083T patent/DK1303005T3/en active
- 2001-10-10 ES ES01124083T patent/ES2239087T3/en not_active Expired - Lifetime
- 2001-10-10 EP EP01124083A patent/EP1303005B1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1905182A1 (en) * | 1969-02-03 | 1970-09-17 | Kathrein Werke Anton Katrein | Quick connection for coaxial cable |
US3836946A (en) * | 1972-03-30 | 1974-09-17 | Siemens Ag | Coaxial connector |
EP1028498A1 (en) * | 1999-02-10 | 2000-08-16 | Spinner GmbH Elektrotechnische Fabrik | Connector for a coaxial cable with a smooth outer conductor |
EP1122835A1 (en) * | 2000-02-04 | 2001-08-08 | Cabel-Con A/S | One piece connector |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005027273A1 (en) * | 2003-09-09 | 2005-03-24 | Commscope, Inc. Of North Carolina | Coaxial connector with enhanced insulator member and associated methods |
US7011546B2 (en) | 2003-09-09 | 2006-03-14 | Commscope Properties, Llc | Coaxial connector with enhanced insulator member and associated methods |
AU2004273493B2 (en) * | 2003-09-09 | 2007-11-29 | Commscope, Inc. Of North Carolina | Coaxial connector with enhanced insulator member and associated methods |
KR100801357B1 (en) | 2003-09-09 | 2008-02-05 | 콤스코프 인코포레이티드 오브 노스 캐롤라이나 | Coaxial connector with enhanced insulator member and associated methods |
CN100409490C (en) * | 2003-09-09 | 2008-08-06 | 北卡罗来纳康姆斯科普公司 | Coaxial connector with enhanced insulator member and associated methods |
US7261581B2 (en) | 2003-12-01 | 2007-08-28 | Corning Gilbert Inc. | Coaxial connector and method |
WO2006001999A1 (en) * | 2004-06-15 | 2006-01-05 | Corning Gilbert Inc. | Coaxial connector with center conductor seizure |
US7104839B2 (en) | 2004-06-15 | 2006-09-12 | Corning Gilbert Inc. | Coaxial connector with center conductor seizure |
CN100442601C (en) * | 2004-06-15 | 2008-12-10 | 康宁吉伯股份有限公司 | Coaxial connector with center conductor seizure |
US7077700B2 (en) | 2004-12-20 | 2006-07-18 | Corning Gilbert Inc. | Coaxial connector with back nut clamping ring |
US7189114B1 (en) | 2006-06-29 | 2007-03-13 | Corning Gilbert Inc. | Compression connector |
Also Published As
Publication number | Publication date |
---|---|
ES2239087T3 (en) | 2005-09-16 |
DE60109294T2 (en) | 2006-05-18 |
DE60109294D1 (en) | 2005-04-14 |
ATE290724T1 (en) | 2005-03-15 |
EP1303005B1 (en) | 2005-03-09 |
DK1303005T3 (en) | 2005-05-02 |
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