EP0777918B1 - Commutateur pour signaux hyperfrequences - Google Patents
Commutateur pour signaux hyperfrequences Download PDFInfo
- Publication number
- EP0777918B1 EP0777918B1 EP96910994A EP96910994A EP0777918B1 EP 0777918 B1 EP0777918 B1 EP 0777918B1 EP 96910994 A EP96910994 A EP 96910994A EP 96910994 A EP96910994 A EP 96910994A EP 0777918 B1 EP0777918 B1 EP 0777918B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrically conductive
- contact
- pads
- conductive part
- lines
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/10—Auxiliary devices for switching or interrupting
- H01P1/12—Auxiliary devices for switching or interrupting by mechanical chopper
Definitions
- the present invention relates to a switch for signals. microwave.
- switches which include, inside a metal cavity, two pads electrically conductors, each comprising a contact face, and a part electrically conductive movable between a closed position in which it rests on the contact faces of the pads and connects these electrically and an open position in which it is set back from said contact faces.
- the microwave signal is transmitted, at least by capacitive coupling, between the contact faces of the pads and the part electrically conductive.
- switches are often used to convey not only microwave signals, but also currents direct, for example bias currents, or currents medium or low frequency AC, for example currents feed.
- the switch operates satisfactory, whatever its conditions of use, for which is microwave signals but faults in operation may appear with regard to the currents of medium or low frequency, or direct currents.
- Friction wear would be even faster if the tops of the ripples had a sharp edge.
- the present invention aims to provide a switch for microwave signals, also usable for low frequency signals and continuous signals which solves the problems mentioned above and in particular has a very high reliability, whatever are the operating conditions to which it is subject.
- the subject of the present invention is a switch for microwave and continuous signals including inside a box metallic, an electrically conductive part and two studs electrically conductive, each having a contact face with a surface facing said piece, said piece electrically conductive being movable between a closed position in which it rests on the contact faces of the two studs and connects them electrically and an open position in which it is set back from said contact faces, characterized by the fact that at least one of the contact faces and / or the surface of said electrically conductive part are provided with protrusions comprising, according to at least one section plane perpendicular to the face contact, a sharp-edged section with an angle at the top less than 110 ° and a radius of curvature less than 0.05 mm.
- the device according to the invention allows, by reducing the bearing surface between the electrically conductive part and the faces contact pads, increase contact pressure.
- the grooves which separate two adjacent protrusions of the contact face of the pads allow to evacuate the impurities broken by the tops of the protuberances.
- protrusions are all contact zones between the studs and the electrically conductive part, which limits the risks false contacts.
- the protrusions extend along parallel section lines constant.
- these lines are rectilinear.
- these lines are circular and concentric.
- these lines are in a spiral.
- the face of contact of the studs may include a peripheral crown on which extend the circular or spiral lines while a recess is formed in the central part delimited by said crown of the contact face of the stud.
- the invention applies equally well to switches in which the contact face of the pads is provided with protuberances, while the surface of the electrically conductive part facing contact faces of the pads is smooth or provided with protrusions having the geometric characteristics defined above, that switches in which the contact face of the pads is smooth while the surface of the electrically conductive part facing contact faces of the pads is provided with said protrusions.
- the switch of Figure 1 has, inside a box 1 electrically conductive and earthed, two pads 2 electrically conductive, each connected to a terminal of a circuit electric, and an electrically conductive elongated part 3, is here in the form of a metal blade carried by a piston 4, axially movable as indicated by the double arrow.
- the metal blade 3 Due to the movements of the piston 4, the metal blade 3 is likely to assume a closed position, shown on the drawing, in which it rests on the end faces 5 pads 2, called contact faces in the sense of the invention, and a open position in which it is set back from the studs 2, preferably bearing against the wall of the housing 1 of so as not to be able to play the role of an antenna which would transmit electrical signals from one pad to another by radiation.
- the pads 2 of the switch of Figure 1 are circular and have protuberances 6 on their upper face 5 as visible in Figure 2.
- protrusions 6 are distributed over a crown peripheral 7 of the contact face 5 of the stud, a recess 8 being formed inside this crown 7 in the central part of the contact face of the stud.
- the protrusions 6 extend along lines of constant section, these lines being circular and concentric.
- the protrusions 6 have, according to an axial section plane of the stud, an acute section clearly visible in Figure 4.
- the radius has been transferred curvature (r) and the opening angle ⁇ at the top of each protuberance.
- the radius of curvature r is equal to 0.01 mm and the angle at the top is 75 °.
- the protuberances result from a crossing of circular and concentric projecting lines and radial broken lines.
- the protuberances result from a crossing of protruding straight lines extending in two constant directions perpendicular to each other.
- the protrusions 6, which have have been described on the contact face 5 of each stud, can also be provided on the surface 9 of the part electrically conductor 3 opposite the contact faces 5 of the pads, as shown in Figure 10 where we see that the end of the part contact 3 is triangular in shape.
- the geometry of the protrusions 6 must then present the same geometrical characteristics as those defined above for the protrusions provided on the contact face of the studs.
- the contact face of the pads can be smooth or also have protuberances.
Landscapes
- Contacts (AREA)
Abstract
Description
- la figure 1 est une vue en coupe d'un commutateur selon un mode de réalisation de l'invention,
- la figure 2 est une vue en perspective d'un plot du commutateur de la figure 1,
- la figure 3 est une vue en coupe selon III-III de la figure 2,
- la figure 4 est une vue rapprochée des protubérances du plot de la figure 3,
- la figure 5 est une vue de détail de la partie 5 de la figure 4,
- les figures 6 à 9 sont des vues de dessus de plots comportant des protubérances de différents types, et
- la figure 10 est une vue en perspective d'une pièce électriquement conductrice d'un commutateur selon la figure 1.
Claims (5)
- Commutateur pour signaux hyperfréquences et continus comprenant, à l'intérieur d'un boitier métallique, une pièce électriquement conductrice, et deux plots électriquement conducteurs, comportant chacun une face de contact avec une surface en regard de ladite pièce, ladite pièce électriquement conductrice étant mobile entre une position de fermeture dans laquelle elle prend appui sur les faces de contact des deux plots et les relie électriquement et une position d'ouverture dans laquelle elle se trouve en retrait desdites faces de contact, caractérisé par le fait que l'une au moins des faces de contact (5) et/ou la surface (9) de ladite pièce électriquement conductrice (3) sont munies de protubérances (6) comportant, selon au moins un plan de coupe perpendiculaire à la face de contact une section à arête vive, ayant un angle au sommet ( ) inférieur à 110° et un rayon de courbure (r) inférieur à 0,05 mm.
- Commutateur selon la revendication 1, caractérisé par le fait que les protubérances (6) s'étendent selon des lignes parallèles de section constante.
- Commutateur selon la revendication 2, caractérisé par le fait que les lignes sont rectilignes.
- Commutateur selon la revendication 2, caractérisé par le fait que les lignes sont circulaires et concentriques.
- Commutateur selon la revendication 2, caractérisé par le fait que les lignes sont en spirale.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9503613 | 1995-03-28 | ||
FR9503613A FR2732508B1 (fr) | 1995-03-28 | 1995-03-28 | Commutateur pour signaux hyperfrequences |
PCT/FR1996/000471 WO1996030961A1 (fr) | 1995-03-28 | 1996-03-28 | Commutateur pour signaux hyperfrequences |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0777918A1 EP0777918A1 (fr) | 1997-06-11 |
EP0777918B1 true EP0777918B1 (fr) | 2000-12-27 |
Family
ID=9477486
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96910994A Expired - Lifetime EP0777918B1 (fr) | 1995-03-28 | 1996-03-28 | Commutateur pour signaux hyperfrequences |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0777918B1 (fr) |
CA (1) | CA2191253A1 (fr) |
DE (1) | DE69611345T2 (fr) |
FR (1) | FR2732508B1 (fr) |
WO (1) | WO1996030961A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6856212B2 (en) * | 2002-12-16 | 2005-02-15 | Com Dev Ltd. | Incomplete mechanical contacts for microwave switches |
EP1840917B1 (fr) | 2006-03-27 | 2013-09-25 | Abb Ab | Contacteur électrique |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB579365A (en) * | 1941-06-06 | 1946-08-01 | Standard Telephones Cables Ltd | Improvements in or relating to electrical contact arrangements particularly for use with high frequencies |
FR1170621A (fr) * | 1957-04-04 | 1959-01-16 | Kienzle Uhrenfabriken Ag | Dispositif de contact électrique |
DE1539783A1 (de) * | 1966-06-21 | 1969-07-24 | Conradty Fa C | Anordnung zur Verbesserung der Kontaktgabe bei ruhenden oder bewegten elektrischen Kohle-,Graphit- und Metall-Kontakten |
JPH0575302A (ja) * | 1991-09-12 | 1993-03-26 | Nec Corp | 同軸切替器 |
-
1995
- 1995-03-28 FR FR9503613A patent/FR2732508B1/fr not_active Expired - Fee Related
-
1996
- 1996-03-28 WO PCT/FR1996/000471 patent/WO1996030961A1/fr active IP Right Grant
- 1996-03-28 DE DE69611345T patent/DE69611345T2/de not_active Expired - Lifetime
- 1996-03-28 EP EP96910994A patent/EP0777918B1/fr not_active Expired - Lifetime
- 1996-03-28 CA CA 2191253 patent/CA2191253A1/fr not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP0777918A1 (fr) | 1997-06-11 |
CA2191253A1 (fr) | 1996-10-03 |
WO1996030961A1 (fr) | 1996-10-03 |
FR2732508B1 (fr) | 1997-05-09 |
DE69611345D1 (de) | 2001-02-01 |
FR2732508A1 (fr) | 1996-10-04 |
DE69611345T2 (de) | 2001-07-19 |
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