EP2015391A1 - Koaxialdämpfer - Google Patents

Koaxialdämpfer Download PDF

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Publication number
EP2015391A1
EP2015391A1 EP08159657A EP08159657A EP2015391A1 EP 2015391 A1 EP2015391 A1 EP 2015391A1 EP 08159657 A EP08159657 A EP 08159657A EP 08159657 A EP08159657 A EP 08159657A EP 2015391 A1 EP2015391 A1 EP 2015391A1
Authority
EP
European Patent Office
Prior art keywords
cartridge
electrically conductive
side wall
electrical component
electrical
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
EP08159657A
Other languages
English (en)
French (fr)
Other versions
EP2015391B1 (de
Inventor
Thierry Le Nadan
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.)
Radiall SA
Original Assignee
Radiall SA
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 Radiall SA filed Critical Radiall SA
Publication of EP2015391A1 publication Critical patent/EP2015391A1/de
Application granted granted Critical
Publication of EP2015391B1 publication Critical patent/EP2015391B1/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
    • H01P1/00—Auxiliary devices
    • H01P1/22—Attenuating devices
    • H01P1/225—Coaxial attenuators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49016—Antenna or wave energy "plumbing" making

Definitions

  • the invention relates to a coaxial device, in particular intended for the assembly of components operating with microwave waves, and in particular attenuators, and to a method of manufacturing such a device.
  • an attenuator in coaxial technology conventionally comprises a cartridge 1 in which is maintained an electrical component 2, for example in the form of a printed circuit or "strip".
  • the cartridge 1 generally has a substantially cylindrical shape of circular base, but may also have other shapes, for example a rectangular or oblong section.
  • the electrical component 2 has an axial center pin 3 and is in electrical contact with the cartridge 1 in order to establish a ground contact, the cartridge conventionally constituting the ground of the coaxial line.
  • the electrical component 2 comprises a substrate 4 in the form of a rectangular plate whose two opposite edges are housed in diametrically opposite grooves formed on the inner surface of the cartridge. Along these edges, the electrical component comprises two ground contact strips 5a and 5b.
  • an electrically conductive corrugated piece 6 is thus interposed between the faces of the grooves and the edges of the substrate 4 which are inserted therein. This piece is shaped so as to be compressed, thus ensuring, by a spring effect, an electrical connection between the ground contact strips 5a and 5b and the cartridge.
  • the corrugated piece 6 is replaced by a solder 7.
  • the electrical contact between the cartridge 1 and the ground contact strip 5a or 5b is of very good quality.
  • the electrical component has a distributed topology, it is however difficult to ensure a uniform solder throughout the length of the cartridge.
  • An object of the invention is to satisfy this need.
  • said side wall is traversed by a through hole providing direct access to the electrical connection.
  • An orifice is considered to provide direct access” to the electrical connection when it allows “straight-line” access to that connection from the surface outer side of the cartridge.
  • An orifice "crosses" the side wall as it extends over the entire thickness of this wall.
  • one or more access orifices according to the invention at appropriate locations in the lateral wall of the cartridge makes it possible to facilitate access to the zone of the electrical connection, in particular to establish or control said electrical connection, thereby which is particularly advantageous when a high quality contact has to be guaranteed between the electrical component and the cartridge.
  • the electrically conductive member of the electrical component is housed, at least in part, in said through hole. More preferably, this conductive element protrudes towards the outside of the cartridge, out of said through orifice. Still preferably, the through hole is formed in the electrically conductive region of the sidewall of the cartridge, the electrically conductive region defining, at least in part, the outer surface of the sidewall of the cartridge.
  • the conductive element can then be soldered to the electrically conductive region from outside the cartridge.
  • the coaxial device according to the invention comprises a solder providing said electrical connection between the conductive region of the side wall of the cartridge and the conductive element of the electrical component.
  • the shape of the through hole is substantially complementary to the portion of the conductive element of the electrical component introduced therein.
  • this conductive element is in physical contact with more than 90%, or even substantially 100%, of the length of the outer edge of the through orifice and / or the lateral surface of this orifice.
  • the cartridge has a groove formed on the inner surface of the cartridge and traversing, over at least a portion of its length, the thickness of the side wall of the cartridge so as to define said orifice crossing. More preferably, the groove is substantially longitudinal and, preferably still, extends substantially over the entire length of the cartridge.
  • the groove is shaped to allow introduction of the electrical component into the cartridge by sliding in the groove.
  • the groove is shaped to guide the electrical component during said introduction.
  • the conductive member passes through said through hole and has an electrically conductive contact strip extending at least in part from the outer side of the side wall of the cartridge.
  • the electrical conductor protrudes from the outer surface of said side wall by more than 0.08 mm, preferably more than 0.1 mm.
  • the contact strip can thus be connected easily, and in particular welded on the electrically conductive region.
  • the contact strip may be fixed on a substrate, for example flat, held in position in a groove formed on the inner surface of the cartridge and defining a said through orifice, the substrate passing through said through orifice so as to expose to outside at least a portion of the contact strip.
  • the width of the groove is substantially identical to the local thickness of the electrical substrate introduced therein.
  • the difference between the width of the groove and the local thickness of the substrate is at least 0.01 mm, preferably at least 0.02 mm.
  • the solder applied to the outside of the cartridge can thus penetrate inside the cartridge through this opening.
  • Said difference is preferably less than 0.05 mm to ensure proper centering of the electrical component in the cartridge.
  • a difference of 0.025 mm is considered optimal.
  • the conductive element of the electrical component may also comprise a plurality of contact strips, in particular ground contact strips, extending over one or both major faces of the substrate.
  • the cartridge may have a plurality of grooves of the type described above, preferably two grooves, and the electrical component be shaped to be inserted into said grooves.
  • the multiplication of the grooves advantageously allows effective maintenance of the electrical component in the cartridge.
  • the grooves are distributed symmetrically with respect to a longitudinal plane (that is to say, including the axis of the cartridge), which advantageously makes it possible to preserve symmetry of the electromagnetic fields.
  • the number of contact strips preferably all of the same type, can be increased to multiply the electrical connections with the cartridge.
  • the contact strips extend along the outer edge of one or more through orifices, preferably formed by the grooves of the type of that described above.
  • all the grooves are substantially identical and all the contact strips are substantially identical and cooperate similarly with the corresponding grooves.
  • the cartridge may comprise first and second grooves, these grooves having one or more of the characteristics of the groove described above.
  • the first and second grooves are longitudinal and belong to the same radial plane, that is to say passing through the axis of the cartridge.
  • the electrical component may comprise a substrate, in particular substantially planar, for example substantially rectangular, of which first and second longitudinal edges are accommodated in the first and second grooves, respectively, at least first and second contact strips extending on the substrate along the first and second longitudinal edges, respectively, projecting outwardly through holes through the bottom of said first and second grooves, respectively.
  • the substrate may in particular carry a printed circuit, on one of its faces or on both sides, possibly with a metallization on its edge.
  • the electrical component may be capable of performing any type of function.
  • it may include attenuation means capable of reducing the amplitude of a periodic electrical signal over at least one frequency range of said signal.
  • these attenuation means may be capable of attenuating a signal with a frequency less than 65 GHz, possibly continuous, and in particular a signal with a frequency of between 20 GHz and 65 GHz, in particular greater than 30 GHz. GHz, or even higher than 40 GHz, with attenuation preferably greater than 10 dB.
  • the electrical component may also perform a different function of the attenuation, for example overvoltage clipping.
  • the coaxial device according to the invention can then advantageously be shaped to allow the assembly of components, including components operating at high frequencies, in coaxial technology.
  • the electrical component comprises an axial connection pin.
  • the conductive element may in particular be intended to establish a mass contact, this contact can be established via the cartridge.
  • the cartridge is preferably an electrically conductive material or coated with a layer of such material. It may have any shape, in particular cylindrical or oblong.
  • the cartridge may in particular have a hollow shape whose side wall has a variable thickness along the length, in particular in line with the groove or grooves. It is thus advantageously possible to adapt the depth of the groove or grooves to provide through holes while ensuring adequate rigidity for the cartridge.
  • the cartridge has the general shape of a sleeve, for example cylindrical, provided with at least one, preferably at its two ends, at least one wing, preferably substantially transverse, at least one groove , preferably longitudinal, being formed on the inner surface of said sleeve, said groove having a depth adapted to pass through the side wall of said sleeve, preferably over the entire length of the sleeve, except at the level of the wing or wings.
  • a sleeve for example cylindrical, provided with at least one, preferably at its two ends, at least one wing, preferably substantially transverse, at least one groove , preferably longitudinal, being formed on the inner surface of said sleeve, said groove having a depth adapted to pass through the side wall of said sleeve, preferably over the entire length of the sleeve, except at the level of the wing or wings.
  • the cartridge can be monobloc.
  • the groove can lead to one of the bases of the cartridge, the other end of the groove being closed by a wall that can serve as a stop to the electrical component.
  • the groove opens on the two bases of the cartridge.
  • the wing (or the wings) may be disposed elsewhere than at the ends of the sleeve. It may extend all around the sleeve, forming for example an annular bead, or only on a part of the periphery of the sleeve.
  • At least one wing preferably at least two wings, establish a material bridge between the two sides of the groove.
  • the wing protrudes from the outer surface of the sleeve, it then covers the groove without allowing it to open outwards by this surface.
  • the depth of the groove may be variable, the depth of the groove being less than the thickness of the side wall of the sleeve to establish a said material bridge.
  • the side wall of the cartridge of constant thickness or not along the groove, and can have a shape that allows it, along the groove, to open the latter outwardly in the form of one or several orifices, preferably with a closed contour, preferably in the form of a single orifice, preferably with a closed contour.
  • a closed contour corresponds to the presence of two material bridges at both ends of the orifice, which improves the mechanical cohesion of the cartridge.
  • the groove does not open towards the outside of the side wall over its entire length.
  • the device according to the invention advantageously makes it possible easily to provide a homogeneous solder over the entire length of the orifices passing through the cartridge. It is therefore particularly suitable when the cartridge has a length greater than 2 mm, or even greater than 4 mm. Generally, the length of the cartridge is less than 30 mm. The largest transverse dimension of the cartridge is conventionally less than a diameter of 5 mm.
  • solder may be used to provide the electrical connection, and in particular an electrically conductive adhesive, that is to say a glue containing conductive particles in a quantity and with a shape such that after polymerization, it provides electrical conduction with a low electrical resistance, typically less than 0.01 ohm.cm.
  • an electrically conductive adhesive that is to say a glue containing conductive particles in a quantity and with a shape such that after polymerization, it provides electrical conduction with a low electrical resistance, typically less than 0.01 ohm.cm.
  • the device according to the invention comprises only a cartridge, an electrical component and, optionally, an outer sleeve.
  • the sleeve may consist of two cylinders covering the first and second ends of the cartridge, respectively, one end of the first cylinder being screwed onto one end of the second cylinder.
  • These two ends of the cylinders may, for example, comprise an internal thread and an external thread corresponding, respectively, the end of the first cylinder being screwed onto the end of the second cylinder.
  • the device according to the invention does not include means for compressing the electrical component, in particular does not include compression means bearing on a conductive element of the electrical component.
  • the electrical connection between the cartridge and the conductive element of the electrical component extends over more than 90% of the length of the cartridge, or even substantially over the entire length of this cartridge, the connection preferably being uninterrupted. that is, continuous.
  • the invention also relates to a method of manufacturing a coaxial device comprising a cartridge delimited by a side wall and an electrical component fixed in said cartridge, preferably a device according to the invention.
  • This method is notable in that an electrically conductive member of the electrical component, preferably through said sidewall, is soldered to the outer surface of the cartridge in an electrically conductive region of said cartridge.
  • the term "attenuator” is a device for reducing the power of a signal.
  • the attenuator makes it possible to reduce the power up to a zero value.
  • the attenuator is then called "charge”.
  • electrical component is included not only a set of discrete elements interconnected by electrical connections, but also screen-printed layers, for example resistive layers.
  • a “solder” is a welding process consisting of interposing an alloy or a fusible metal between the parts to be welded.
  • the term “solder” also refers to this alloy or metal itself.
  • a “coaxial” device is a device comprising, at each of its ends, a single central pin extending substantially along the axis of the device.
  • a coaxial device conventionally comprises an outer envelope or “cartridge”, generally closed on itself.
  • references are assigned a "premium” sign when they relate to an organ or part of an organ located to the right of a figure and corresponding to an organ or part of an organ bearing the same reference but located on the left of the figure.
  • the letters "a” and "b" assigned to a reference serve to distinguish the object of this reference according to whether it corresponds to the first or the second groove, respectively.
  • FIG. 1 The Figures 1 and 2 described in the introduction, reference is now made to Figures 3, 4 and 7 .
  • the device shown comprises a cartridge 1 and an electrical component 2 represented in an assembled position.
  • the cartridge 1 has the general shape of a sleeve of revolution about an axis X, defining a substantially cylindrical interior space 12 of X axis delimited by an inner surface 14 of a side wall 16 of the cartridge and at the ends of the cartridge, by first and second base openings 18 and 18 '.
  • the cartridge is delimited by an outer surface 20 having a central cylindrical lateral surface 21 of prolonged X axis, at each end, by lateral annular lateral surfaces 22 and 22 ', themselves extended by cylindrical end end surfaces 23 and 23' of axis X, then transverse end surfaces 24 and 24 'forming bases of the cartridge 1.
  • the surfaces 22, 23 and 24 on the one hand, and 22 ', 23' and 24 'on the other hand thus define wings 25 and 25' transverse, respectively, forming annular extra thicknesses of the side wall 16 of the cartridge.
  • First and second grooves referenced 26a and 26b, respectively, diametrically opposite, are provided along the length of the cartridge from the inner surface 14 of the cartridge.
  • the grooves 26a and 26b, of width "e”, extend the full length "L” of the cartridge and open on the bases of the cartridge through groove base openings 28a and 28b, and 28a 'and 28b'. , respectively.
  • the grooves 26a and 26b are substantially identical.
  • the wings 25 and 25 ' have a height sufficient for the grooves 26a and 26b do not open laterally at these wings.
  • the wings 25 and 25 'thus ensure the physical integrity of the cartridge by securing the two parts of the cartridge extending on either side of these grooves.
  • the grooves 26a and 26b pass through the thickness of the side wall 16, over a length " l ", between the wings 25 and 25 '.
  • the grooves 26a and 26b thus form orifices 30a and 30b, respectively, through the side wall 16 and of substantially rectangular section.
  • the length "l” corresponds to the length of the central lateral surface 21, so that the orifices 30a and 30b extend to the wings 25 and 25 '.
  • the side wall 16 is "traversed" by a through orifice, which means that this orifice opens on the inner surface 14 on the one hand and on the lateral surface of the side wall 16 on the other hand, this lateral surface being formed by the central lateral surface 21, the transverse annular lateral surfaces 22 and 22 'and the end lateral surfaces 23 and 23', without including the transverse end surfaces 24 and 24 '.
  • said through orifice must pass through the entire thickness of the side wall 16.
  • the through orifice is oriented substantially radially.
  • the central lateral surface 21, at least near the orifices 30a and 30b, or even the entire outer surface 20 of the cartridge 1, constitutes a conductive region electrically.
  • the entire cartridge 1 is made of an electrically conductive material.
  • the electrical component 2 shown in more detail on the figure 5 , comprises a substrate 50 substantially rectangular plane.
  • This substrate carries a printed circuit 52 electrically connected to two x-axis coaxial pins 54 and 54 'for central axial connection with other electrical components, and an electrically conductive element for grounding.
  • This conductive element comprises two contact strips, 58a and 58b, of mass extending along the longitudinal edges 62a and 62b of the substrate 50, respectively.
  • the pins 54 and 54 'for the internal electrical contact are soldered to the printed circuit 52 by solderings 68 and 68', respectively.
  • the contact strips 58a and 58b are connected together and with constituents of the printed circuit 52 by a figure 5 ) or two ( figure 6 ), or more, transverse strips 66 likely to carry electronic components.
  • the electrical component 2 is shaped so as to be disposed inside the cartridge 1, the pins 54 and 54 'passing through the base openings 18 and 18', respectively.
  • the length of the longitudinal edges 62a and 62b of the substrate 50 is substantially equal to the length L of the cartridge 1.
  • the electrical component 2 can thus be arranged in the interior space 12, the transverse edges 64 and 64 'of the substrate flush with the bases of the cartridge.
  • the thickness of the substrate is substantially equal to the width "e" of the grooves. The maintenance of the electrical component 2 is then optimal.
  • the length l 50 of transverse edges 64 and 64 'of the substrate 50 is greater than the inside diameter d i of the cartridge, lower than the outside diameter D e of the cartridge at the flanges 25 and 25', and lower, preferably substantially equal to at the distance separating the bottoms of the grooves 26a and 26b at the wings 25 and 25 '.
  • the substrate 50 can thus be introduced into the cartridge 1 by guided sliding of the longitudinal edges 62a and 62b in the grooves 26a and 26b, respectively.
  • the length l 50 of the transverse edges 64 and 64 ' is greater than the outer diameter of the cartridge 1 at the central lateral portion 21.
  • the longitudinal edges 62a and 62b can thus project from the central lateral surface 21, exposing the outside at least a portion of the contact strips 58a and 58b.
  • solders 70a and 70b extend along the entire length of the longitudinal edges of the orifices 30a and 30b, but may also extend under the wings 25 and 25 '.
  • the assembly of the device represented on the Figures 3 and 4 is particularly simple.
  • the electrical component 2 is slid inside the cartridge 1 by sliding the longitudinal edges 62a and 62b in the grooves 26a and 26b until the transverse edges 64 and 64 'are flush with the bases of the cartridge.
  • the contact strips 58a and 58b then protrude, through the through orifices 30a and 30b, from the central lateral surface 21 of the outer surface 20 of the cartridge 1.
  • a solder is then produced from the outside of the cartridge 1 so electrically connecting the central conductive side surface and the contact strips of the electrical component 2 protruding therefrom.
  • solder may be supplemented by solders made from the groove base openings 28a, 28b, 28a 'and 28b', as in the prior art described in the introduction.
  • the solders make it possible to establish an electrical connection between the cartridge 1 and the contact strips 58a and 58b substantially over the entire length of the latter.
  • solders can be made, as shown in FIG. figure 4 on each side of the substrate 50.
  • the invention makes it possible to considerably simplify brazing operations and thus simplify the manufacture of the coaxial device.
  • it allows a continuous solder substantially over the entire length of the contact strips of the electrical component inserted in the cartridge.
  • the application of the solder to the outer surface of the cartridge allows a particularly easy visual control of its quality.
  • the shape of the cartridge and the electrical component could be different from that described.
  • the contact strips could also have various shapes.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
EP08159657A 2007-07-03 2008-07-03 Koaxialdämpfer Active EP2015391B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0756246A FR2918505B1 (fr) 2007-07-03 2007-07-03 Attenuateur coaxial

Publications (2)

Publication Number Publication Date
EP2015391A1 true EP2015391A1 (de) 2009-01-14
EP2015391B1 EP2015391B1 (de) 2012-11-14

Family

ID=39015845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08159657A Active EP2015391B1 (de) 2007-07-03 2008-07-03 Koaxialdämpfer

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US (1) US7839238B2 (de)
EP (1) EP2015391B1 (de)
FR (1) FR2918505B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008009225U1 (de) * 2008-07-09 2008-09-18 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Streifenleitung mit Durchkontaktierung
US11705611B2 (en) * 2021-05-20 2023-07-18 Ryan Letcher High-frequency coaxial attenuator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260971A (en) * 1964-12-03 1966-07-12 Weinschel Eng Co Inc Multi-layer card attenuator for microwave frequencies
US4011531A (en) * 1975-09-29 1977-03-08 Midwest Microwave, Inc. Microwave attenuator having compensating inductive element
US20040104787A1 (en) * 2002-12-03 2004-06-03 Steven Shafer CATV Filter assembly with improved electrical grounding
US20060097817A1 (en) * 2002-09-04 2006-05-11 Yann Blavette Attenuation or termination element having a coaxial structure for high-frequency electromagnetic waves
US20070013461A1 (en) * 2005-07-13 2007-01-18 Noah Montena Casing for CATV filter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7359878B2 (en) 2001-12-07 2008-04-15 Siemens Power Transmission & Distribution, Inc. Pricing apparatus for resolving energy imbalance requirements in real-time

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260971A (en) * 1964-12-03 1966-07-12 Weinschel Eng Co Inc Multi-layer card attenuator for microwave frequencies
US4011531A (en) * 1975-09-29 1977-03-08 Midwest Microwave, Inc. Microwave attenuator having compensating inductive element
US20060097817A1 (en) * 2002-09-04 2006-05-11 Yann Blavette Attenuation or termination element having a coaxial structure for high-frequency electromagnetic waves
US20040104787A1 (en) * 2002-12-03 2004-06-03 Steven Shafer CATV Filter assembly with improved electrical grounding
US20070013461A1 (en) * 2005-07-13 2007-01-18 Noah Montena Casing for CATV filter

Also Published As

Publication number Publication date
US20090009272A1 (en) 2009-01-08
EP2015391B1 (de) 2012-11-14
FR2918505A1 (fr) 2009-01-09
FR2918505B1 (fr) 2011-04-01
US7839238B2 (en) 2010-11-23

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