EP3249741A1 - Vorrichtung zur verbindung zwischen einer streifenleitung und einem koaxialkabel - Google Patents

Vorrichtung zur verbindung zwischen einer streifenleitung und einem koaxialkabel Download PDF

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Publication number
EP3249741A1
EP3249741A1 EP16305603.9A EP16305603A EP3249741A1 EP 3249741 A1 EP3249741 A1 EP 3249741A1 EP 16305603 A EP16305603 A EP 16305603A EP 3249741 A1 EP3249741 A1 EP 3249741A1
Authority
EP
European Patent Office
Prior art keywords
circuit board
printed circuit
strip line
coaxial cable
cover
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
Application number
EP16305603.9A
Other languages
English (en)
French (fr)
Other versions
EP3249741B1 (de
Inventor
Aurélien Hilary
Patrick Lecam
Jean-Pierre Harel
Zied Charaabi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Shanghai Bell Co Ltd
Original Assignee
Alcatel Lucent Shanghai Bell Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alcatel Lucent Shanghai Bell Co Ltd filed Critical Alcatel Lucent Shanghai Bell Co Ltd
Priority to EP16305603.9A priority Critical patent/EP3249741B1/de
Publication of EP3249741A1 publication Critical patent/EP3249741A1/de
Application granted granted Critical
Publication of EP3249741B1 publication Critical patent/EP3249741B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/085—Coaxial-line/strip-line transitions

Definitions

  • the present subject matter relates to a device for the connection between a strip line and a coaxial cable.
  • the strip line is realized on a printed circuit board.
  • This device allows the transition between a coaxial cable and a suspended stripline and is also known as junction.
  • Base station antennas are built with arrays of several radiating elements, connected to distribution networks (power dividers, phase shifters) with transmission lines.
  • strip line which is a fully shielded transmission line and preferably air strip line, as air is the minimum loss and cheapest dielectric available.
  • the problem solved by the preset subject matter, is to design an efficient junction between the strip line distribution network sub-assemblies and the coaxial cables driving the signals to the radiating elements of the antenna array.
  • Various embodiments propose device for the connection between a strip line and a coaxial cable that can solve the previously described problems.
  • a device for the connection between a strip line and a coaxial cable is described.
  • the strip line is realized on a first part of a printed circuit board
  • the coaxial cable includes an inner conductor and an outer conductor.
  • the device comprises a cover top and a cover bottom respectively located over and under the printed circuit board.
  • a second part of the printed circuit board is inductively coupled with the cover top and the cover bottom and the inner conductor is electrically connected to the strip line and the outer conductor is inductively or electrically connected to the second part of the printed circuit board.
  • an antenna comprising a device for the connection between a strip line and a coaxial cable is described.
  • the junction of coaxial cables to strip lines is realized by using metal plates on which the cable braid can be soldered directly for example be brass, copper.
  • metal plates on which the cable braid can be soldered directly for example be brass, copper.
  • the PIM performances are good, but the main problem regarding this solution is material cost. Huge brass or copper plates are necessary, and these materials are expensive (three times aluminum cost, and the trend is regular increase of these copper alloys cost).
  • junction of coaxial cables to strip lines is realized by using metal plates on which the cable cannot be soldered, for example aluminum.
  • metal plates on which the cable cannot be soldered for example aluminum.
  • Figure 1 presents an embodiment of a device for the connection between a strip line 101, realized on a first part of a printed circuit board 102, and a coaxial cable 103.
  • the coaxial cable 103 includes an inner conductor 104 and an outer conductor 105.
  • the device comprises a cover top 106 and a cover bottom 107 respectively located over and under the printed circuit board.
  • a second part of the printed circuit board 102 is inductively coupled with the cover top 106 and the cover bottom 107.
  • the inner conductor 104 is electrically connected to the strip line 101 and the outer conductor 105 is inductively or electrically connected to the second part of the printed circuit board.
  • the best results are achieved by using a inductive connection.
  • the device of this embodiment allows cheap material for the strip line ground plates with no solder on these plates. This embodiment also avoids adding extra parts to reduce cost and PIM performances. This embodiment reduces assembly time to improve production line capacity.
  • At least one of the insulating layers is constituted of a insulating varnish.
  • the second part is located around the strip line.
  • a coaxial cable is connected to a strip line as.
  • the whole assembly comprises the coaxial cable, the strip line conductor, the top and bottom covers.
  • the strip line conductor is printed on a thin PCB board.
  • the top and bottom covers are made with bended plates of low cost material, for example aluminum.
  • the top cover is capacitively coupled trough the PCB top varnish layer to the PCB metal coupling area (top side).
  • This PCB metal coupling area is connected to the PCB bottom coupling area by PCB metalized via.
  • This PCB bottom coupling area is also capacitively coupled through a PCB varnish layer to the bottom cover.
  • the link to the coaxial cable is made by soldering the braid on the PCB top metal coupling area.
  • the inner conductor of the cable is soldered on the strip line conductor.
  • a window is shaped in the top cover in front of the cable to avoid random contact.
  • top and bottom covers and the printed circuit board are be maintained together by very low cost plastic rivets (not represented on the figures).
  • the contact pressure required is much less critical than direct contact for good PIM performances.
  • Another embodiment of the present subject matter is an antenna comprising one of the connection devices previously described.
  • At least one connection device is used to connect radiating elements and/or feeding networks and/or splitters and/or phase shifters and/or filters and/or active boards and/or any other RF devices implemented within the antenna.
  • connection device of the present subject matter can also be used for any kind of device requiring a coaxial cable to stripline connection, for example filters, amplifiers, etc..

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  • Details Of Aerials (AREA)
EP16305603.9A 2016-05-24 2016-05-24 Vorrichtung zur verbindung zwischen einer streifenleitung und einem koaxialkabel Active EP3249741B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16305603.9A EP3249741B1 (de) 2016-05-24 2016-05-24 Vorrichtung zur verbindung zwischen einer streifenleitung und einem koaxialkabel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16305603.9A EP3249741B1 (de) 2016-05-24 2016-05-24 Vorrichtung zur verbindung zwischen einer streifenleitung und einem koaxialkabel

Publications (2)

Publication Number Publication Date
EP3249741A1 true EP3249741A1 (de) 2017-11-29
EP3249741B1 EP3249741B1 (de) 2020-02-26

Family

ID=56108591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16305603.9A Active EP3249741B1 (de) 2016-05-24 2016-05-24 Vorrichtung zur verbindung zwischen einer streifenleitung und einem koaxialkabel

Country Status (1)

Country Link
EP (1) EP3249741B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108987867A (zh) * 2018-08-03 2018-12-11 中天宽带技术有限公司 一种超宽带同轴线-等效带状线平面过渡结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3587004A (en) * 1969-09-23 1971-06-22 Sylvania Electric Prod Contradirectional couplers
US20030218515A1 (en) * 2000-05-09 2003-11-27 Nec Corporation Radio frequency circuit module on multi-layer substrate
US20120244727A1 (en) * 2009-02-25 2012-09-27 Jean-Pierre Harel Mechanical and electric connection device for a coaxial cable conveying a high-frequency signal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8362856B2 (en) * 2009-11-17 2013-01-29 Raytheon Company RF transition with 3-dimensional molded RF structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3587004A (en) * 1969-09-23 1971-06-22 Sylvania Electric Prod Contradirectional couplers
US20030218515A1 (en) * 2000-05-09 2003-11-27 Nec Corporation Radio frequency circuit module on multi-layer substrate
US20120244727A1 (en) * 2009-02-25 2012-09-27 Jean-Pierre Harel Mechanical and electric connection device for a coaxial cable conveying a high-frequency signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108987867A (zh) * 2018-08-03 2018-12-11 中天宽带技术有限公司 一种超宽带同轴线-等效带状线平面过渡结构

Also Published As

Publication number Publication date
EP3249741B1 (de) 2020-02-26

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