EP2348571A1 - Kompakter thermoelastischer Aktuator für Wellenleiter, phasenstabiler Wellenleiter und Multiplexvorrichtung mit einem solchen Aktuator - Google Patents

Kompakter thermoelastischer Aktuator für Wellenleiter, phasenstabiler Wellenleiter und Multiplexvorrichtung mit einem solchen Aktuator Download PDF

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Publication number
EP2348571A1
EP2348571A1 EP10189709A EP10189709A EP2348571A1 EP 2348571 A1 EP2348571 A1 EP 2348571A1 EP 10189709 A EP10189709 A EP 10189709A EP 10189709 A EP10189709 A EP 10189709A EP 2348571 A1 EP2348571 A1 EP 2348571A1
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EP
European Patent Office
Prior art keywords
waveguide
actuator
force
fingers
sides
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Granted
Application number
EP10189709A
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English (en)
French (fr)
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EP2348571B1 (de
Inventor
Joël Lagorsse
Fabien Montastier
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Thales SA
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Thales SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/30—Auxiliary devices for compensation of, or protection against, temperature or moisture effects ; for improving power handling capability

Definitions

  • the present invention relates to a compact thermoelastic actuator for a waveguide, a phase stability waveguide and a multiplexing device comprising such an actuator. It applies in particular to the compensation of the volume changes of a waveguide subjected to temperature variations and more particularly to the waveguides of the multiplexers integrated into satellite space equipment.
  • OMUX In English: Output Multiplexer
  • These OMUX generally comprise several channels interconnected by at least one waveguide, also called manifold, whose dimensional variations due to temperature variations induce an offset of the geometric distance between the channel connection ports of OMUX and phase shifts in the guided waves. These phase shifts cause a malfunction of the equipment and can for example cause mismatches of the OMUX channels.
  • the waveguide in a material with a low thermal expansion rate CTE (in English: Coefficient of Thermal Expansion) such as titanium or an alloy of iron and nickel, for example the invar (registered trademark).
  • CTE coefficient of Thermal Expansion
  • space equipment is generally made of low density materials such as aluminum which has a high coefficient of thermal expansion, assemblies with low CTE waveguides cause mechanical stress during temperature variations. between structures that can cause malfunctions.
  • the document US 5,428,323 discloses a method of compensating the thermal expansion of a rectangular section waveguide by applying a deformation on its two side walls of smaller width so as to provide phase stability.
  • the deformation is applied by small-side orthogonal spacers fixed between the short sides of the waveguide and a low CTE holding structure disposed around the waveguide.
  • the spacer pieces lengthen or shrink and pull or support orthogonally on the short sides, which forces the short sides of the waveguide to deform along an axis orthogonal to these small sides.
  • this technology requires the use of a holding structure arranged around the waveguide.
  • phase stability waveguide assembly in which lever mechanisms are rotated about pivots under the action of temperature variations and compensate for larger variations in waveguide size by temperature function by pulling or pressing orthogonally on the short sides of the waveguide.
  • this assembly is complex, cumbersome and can hinder the positioning of the adjacent channels and the mechanical interfaces of the OMUX near the waveguide, particularly in the context of a compact configuration in which the channels are arranged in staggered rows. on both sides of the waveguide.
  • the document CA 2,432,876 discloses another phase stability waveguide assembly in which the short sides of the waveguide have a curved initial length and are constrained in a lateral direction of the waveguide by a plurality of low CTE plates placed sideways side by side along the waveguide laterally on either side of each small curved side.
  • the expansion or contraction of the short sides is restricted by the side plates while the long sides are free to expand or contract.
  • This assembly has the disadvantage of requiring pre-bending the short side of the waveguide while laterally and symmetrically ribbing the upper and lower portions of the waveguide, thus reducing the positioning latitude of the channels relative to the guide of the waveguide. Waveform as well as the mechanical interfaces of the OMUX near the waveguide.
  • the object of the invention is to provide a thermoelastic waveguide actuator for ensuring the phase stability of the waveguide and not having the disadvantages of existing devices.
  • the invention relates to a thermoelastic actuator for simple waveguide to be implemented, of small size, optimized to minimize the volume occupied near the waveguide and the channels, and particularly adapted to a technology of 'OMUX with vertical structure.
  • the invention relates to a compact thermoelastic waveguide actuator comprising at least two identical stress parts made of a first material having a first coefficient of thermal expansion and a holding part made of a second different material. of the first material and having a second coefficient of thermal expansion less than the first coefficient of thermal expansion, characterized in that the force pieces have a length which extends in a longitudinal direction Y between two outer and inner ends, are mounted head -beach one beside the other parallel to the Y direction and are linearly offset relative to each other, along the longitudinal axis Y, and in that the holding piece has two ends upper and lower and a middle zone located in a central region of the holding part between the two upper ends the lower and upper ends, the upper and lower ends of the holding part being respectively connected to the outer ends of each piece of force and the inner ends of each piece of force being positioned under the median zone of the holding piece.
  • the linear shift of the workpieces relative to each other, along the longitudinal axis Y is equal to half their length.
  • the force parts are filiform and may be, for example, longitudinal bars.
  • the force parts are axially symmetrical. They may for example have an inner fork-shaped end having at least two fingers.
  • the actuator comprises at least four pieces of effort mounted head to tail two by two and the fingers of the forks consecutive pieces of effort mounted in the same direction are intersecting one above the other .
  • each finger has a point of attachment and the attachment points of two interlocking fingers belonging to two consecutive pieces of effort mounted in the same direction are connected together.
  • the invention also relates to a phase stability waveguide having a rectangular cross-section having two long sides and two small opposite sides and having at least two external longitudinal ribs, respectively upper and lower, located symmetrically in the extension of the long sides. respectively on the two small opposite sides of the waveguide, the two ribs being off-axis with respect to a median axis of the short sides, the waveguide comprising at least one compact thermoelastic actuator, the actuator having its axis longitudinally positioned parallel to a large side of the rectangular waveguide and the inner ends of the actuator force parts located below the median zone being respectively fixed to the outer longitudinal ribs of the waveguide.
  • the invention finally relates to a multiplexing device comprising at least one phase stability waveguide.
  • the first example of an actuator represented on the Figures 1 and 2 and the second example of actuator shown on the Figures 3a and 3b are of elongate shape along a longitudinal axis Y and comprise an even number of identical force pieces 10a, 10b, 10c, 10d, 30a, 30b made of a first material having a first coefficient of thermal expansion CTE1 and a holding piece 11 , 31 made in a second material different from the first material and having a second coefficient of thermal expansion CTE2 lower than the first coefficient of thermal expansion CTE1.
  • the first material is a thermal conductive material with a high coefficient of thermal expansion such as aluminum and the second material is a material with a low coefficient of thermal expansion. thermal expansion such as titanium or an alloy of iron and nickel such as Invar.
  • the stresses 10a to 10d, 30a, 30b and the retaining piece 11, 31 are of elongated shape along a longitudinal axis Y and may have, as on the Figures 1 and 2 , Axial symmetry with respect to the longitudinal axis Y.
  • the stresses are filamentary and may for example be substantially straight bars, of small width and thin as on the Figures 3a and 3b or have a forked end with two fingers as on the Figures 1 and 2 or have any other shape with axial symmetry with respect to the Y axis, elongate in the Y direction and preferably narrow in the X and Z directions orthogonal to the Y direction.
  • the length and the thickness of the effort pieces may have values vary widely depending on the application. By way of non-limiting example, the workpieces may be a few millimeters thick and several centimeters in length, or different values of a factor of ten and even beyond.
  • the stresses 10a, 10b or 10c, 10d or 30a, 30b are mounted head to tail next to each other in the same plane XY and so that two pieces of force mounted vis-à-vis are linearly offset from one another along the longitudinal axis Y by a distance of approximately half their length.
  • Each piece of force has an inner end 12, 13, 32 disposed in a central zone 14, 34 of the actuator 15, 35 and an outer end 16, 36, the inner ends 12, 13, 32 and outer 16, 36 being provided with fixing points.
  • the holding piece 11, 31 has two opposite ends, respectively upper 20, 37 and lower 21, 38 and a median zone situated between the two upper and lower ends, the median zone of the holding piece 11, 31 corresponding to the central zone 14, 34 of the actuator 15, 35.
  • the holding piece is mounted on an upper face of the force pieces so that the median zone 14, 34 of the retaining piece 11, 31 covers at least partially the inner ends 12, 13, 32 of the force parts and that its two opposite ends 20, 21, 37, 38 are fixed to the attachment points of the outer ends 16, 36 pieces of effort.
  • the holding piece 11, 31 has a small thickness relative to its length, the length and the thickness of the holding piece being of the same order of magnitude as those of the force pieces, and may for example have an asymmetrical shape substantially planar which comprises a median zone 14, 34 of width equal to or greater than the width of the workpieces provided with lateral recesses 39, 40 arranged in the thickness of the holding piece, facing the attachment points of the ends 12, 13, 32 of the stresses, as shown on the Figures 3a and 3b .
  • the retaining piece may have a symmetrical shape that includes a central zone comprising a central recess 22 so as to allow access to the fastening points of the actuator located at the ends of the fingers of the force parts as shown on the Figures 1 and 2 .
  • the holding piece 11, 31 may have any other shape, elongate in the longitudinal direction Y, having a central zone at least partially covering the inner ends of the force parts and two opposite ends fixed to the attachment points of the outer ends of the parts. effort.
  • the figure 4 represents a cross-sectional view of an assembly of the compact thermoelastic actuator of the figure 2 on a waveguide 41 rectangular section at room temperature.
  • the rectangular waveguide 41 has in cross section, two small sides 43a, 43b and two long sides 44 opposite two by two.
  • the waveguide also comprises two external longitudinal ribs 42a, 42b arranged symmetrically respectively on each of the short sides 43a, 43b, in the extension of the long sides 44.
  • the two external ribs 42a, 42b are parallel to each other, extend over approximately half the width of the short sides 43a, 43b and are off-axis with respect to the median axis of the short sides.
  • the ribs 42a, 42b are preferably cut in the mass, and therefore integral with the waveguide 41.
  • the sides 43a, 43b of the waveguide 41 have a wall finer than the long sides 44 so that it is more flexible and can be deformed under the action of tensile or compressive forces.
  • the median zone 14 of the actuator 15 is fixed on one of the long sides 44 of the rectangular waveguide 41 and simultaneously with the two longitudinal ribs 42a, 42b situated respectively on the two opposite small sides 43a, 43b of the guide of FIG. 41.
  • the fixing can be achieved for example by means of fixing screws 45 mounted in threaded holes arranged, at the attachment points, in the inner ends 12, 13 of the effort pieces 10a to 10d and passing through one or the other longitudinal ribs 42a, 42b.
  • the lower faces of the inner ends 12, 13 of the force parts 10a to 10d are in contact with the long side 44 and the ribs 42a, 42b of the waveguide 41, the upper faces of the inner ends 12, 13 of the parts of FIG. 10a to 10d are arranged under the median zone of the holding part 11.
  • the geometry of the actuator 15 being axially symmetrical and the workpieces 10a to 10d being mounted head to tail, the fingers 17, 18 of the parts 10a and 10c effort oriented in the same direction are connected to the same rib 42b, the fingers 17, 18 of 10b and 10d force parts oriented in an opposite direction are symmetrically connected to the opposite rib 42a.
  • the Figures 5a and 5b represent two views, respectively in section and in perspective, of the assembly of the figure 4 when the temperature rises.
  • the waveguide and the ribs made in The same high-CTE material such as for example aluminum, expands or contracts which results in a phase shift of the electric waves propagating in the waveguide.
  • the stress parts made of a material with a high CTE, preferably an electrical conductor, which may be identical to or different from the material used for the waveguide, are connected to the ribs of the waveguide by means of the connecting screws. and are therefore subject to the same temperature variations as the waveguide. These pieces of effort will therefore also expand or contract.
  • the holding piece made of a low CTE material such as invar, for example will expand much more weakly than the workpieces, keep a length very close to its initial length and maintain an almost constant distance between the parts. outer ends 16 of the stress pieces.
  • the large difference between the coefficients of thermal expansion CTE1 and CTE2 thus makes it possible to generate a relative movement between the parts of force fixed on the upper rib and the parts of force fixed on the lower rib.
  • the expansions or contractions of the effort pieces will thus result in cross-displacements of the fingers 17, 18 of the forks located at the inner ends of the workpieces 10a to 10b.
  • the fingers will move symmetrically relative to each other, arching and apply compression or traction forces on the ribs of the waveguide through the connecting screws.
  • the traction or compression forces on the ribs will result in a rotation of the ribs on themselves and cause deformation of the short sides of the waveguide.
  • the geometry of the actuator 15 being axially symmetrical, the fingers 17, 18 being symmetrically intercrossed relative to each other and respectively connected in three different attachment points to the two opposite ribs 42a, 42b, the forces are applied simultaneously and symmetrically on the two ribs 42a, 42b.
  • the displacement of the force parts is proportional to both the temperature, the length of the parts of effort between the two outer ends in the longitudinal direction, and the coefficient of expansion of the workpieces.
  • the outer ends 16 of the force parts and the ends 20, 21 of the holding part are connected only to each other and to no other part.
  • FIGS. 6a , 6b and 6c represent perspective views of a rectangular waveguide equipped with several compact thermoelastic actuators according to the invention.
  • the waveguide comprises two upper and lower outer longitudinal ribs 42a and 42b respectively fixed or cut in the mass, on its upper and lower walls corresponding, in cross section, to the two small opposite sides 43a, 43b of the rectangular section of the waveguide.
  • the two upper and lower ribs are off-axis with respect to the median axis of the upper and lower walls and extend symmetrically in the extension of a sidewall of the corresponding waveguide, in cross section, to a long side 44 of the rectangular section.
  • the actuators are distributed at regular intervals along the rectangular waveguide, against the same sidewall, and comprise parts of force 10a to 10d fixed, by their median zone, parallel to a sidewall of the waveguide on both upper and lower veins.
  • the waveguide comprises several upper and lower ribs arranged in staggered rows and inlet ports 60 on its two sides and the actuators 15 are arranged in staggered rows on both sides of the waveguide on either side of each of the input ports 60.
  • the Figures 7 and 8 represent respectively, in perspective and in cross section, two examples of multiplexers, also called OMUX, comprising microwave filters 62 each having an output connected to an access 60 of a common rectangular waveguide 41.
  • the accesses 60 of the rectangular waveguide are arranged at regular intervals on its two sides of larger size corresponding to the long sides 44 of the rectangular section.
  • the filters 62 are arranged parallel to each other and are fixed vertically on a common support 63.
  • the waveguide is disposed horizontally between two rows of filters connected to the accesses on its two sides.
  • the thermoelastic actuators 15 are visible on the cross section of the figure 8 . This figure shows that when the microwave filters 62 are arranged vertically, the space available between the filters for the thermoelastic actuators 15 is very limited.
  • the actuator of the invention extends essentially in a longitudinal direction Y and is very compact in the other directions, which makes it possible to easily insert it between two consecutive filters, its longitudinal axis Y being placed parallel to the vertical

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  • Non-Reversible Transmitting Devices (AREA)
  • Waveguides (AREA)
EP10189709.8A 2009-12-23 2010-11-02 Kompakter thermoelastischer Aktuator für Wellenleiter, phasenstabiler Wellenleiter und Multiplexvorrichtung mit einem solchen Aktuator Active EP2348571B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0906278A FR2954597B1 (fr) 2009-12-23 2009-12-23 Actionneur thermo-elastique compact pour guide d'ondes, guide d'ondes a stabilite de phase et dispositif de multiplexage comportant un tel actionneur.

Publications (2)

Publication Number Publication Date
EP2348571A1 true EP2348571A1 (de) 2011-07-27
EP2348571B1 EP2348571B1 (de) 2014-06-25

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EP10189709.8A Active EP2348571B1 (de) 2009-12-23 2010-11-02 Kompakter thermoelastischer Aktuator für Wellenleiter, phasenstabiler Wellenleiter und Multiplexvorrichtung mit einem solchen Aktuator

Country Status (8)

Country Link
US (1) US8604894B2 (de)
EP (1) EP2348571B1 (de)
JP (1) JP5716246B2 (de)
CN (1) CN102185171B (de)
CA (1) CA2725016C (de)
ES (1) ES2493716T3 (de)
FR (1) FR2954597B1 (de)
RU (1) RU2576589C2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8899038B2 (en) 2011-09-01 2014-12-02 The Johns Hopkins University Release actuator employing components with different coefficients of thermal expansion

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057772A (en) * 1976-10-18 1977-11-08 Hughes Aircraft Company Thermally compensated microwave resonator
DE4319886C1 (de) * 1993-06-16 1994-07-28 Ant Nachrichtentech Anordnung zum Kompensieren temperaturabhängiger Volumenänderungen eines Hohlleiters
CA2432876A1 (en) 2002-06-20 2003-12-20 R. Glenn Thomson Phase stable waveguide assembly
DE10349533A1 (de) * 2003-10-22 2005-06-09 Tesat-Spacecom Gmbh & Co.Kg Hohlleiter mit Temperaturkompensation
EP1909355A2 (de) 2006-10-05 2008-04-09 Com Dev International Limited Anordnungen zur Wärmeausdehnungskompensation
EP2006951A1 (de) * 2007-06-22 2008-12-24 Thales Mechanische Vorrichtung zur Temperaturkompensation für Wellenleiter mit Phasenstabilität

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1406671A1 (ru) * 1986-07-09 1988-06-30 Харьковский Институт Радиоэлектроники Им.Акад.М.К.Янгеля Переменный волноводный аттенюатор
RU1766200C (ru) * 1990-04-09 1995-10-20 Якуб Светлана Михайловна Эластичный поглощающий материал
US6455340B1 (en) * 2001-12-21 2002-09-24 Xerox Corporation Method of fabricating GaN semiconductor structures using laser-assisted epitaxial liftoff
FR2854279B1 (fr) * 2003-04-25 2005-07-08 Cit Alcatel Dispositif a cavite resonnante a conversion de variation dimensionnelle transversale, induite par une variation de temperature, en variation dimensionnelle longitudinale

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057772A (en) * 1976-10-18 1977-11-08 Hughes Aircraft Company Thermally compensated microwave resonator
DE4319886C1 (de) * 1993-06-16 1994-07-28 Ant Nachrichtentech Anordnung zum Kompensieren temperaturabhängiger Volumenänderungen eines Hohlleiters
US5428323A (en) 1993-06-16 1995-06-27 Ant Nachrichtentechnik Gmbh Device for compensating for temperature-dependent volume changes in a waveguide
CA2432876A1 (en) 2002-06-20 2003-12-20 R. Glenn Thomson Phase stable waveguide assembly
DE10349533A1 (de) * 2003-10-22 2005-06-09 Tesat-Spacecom Gmbh & Co.Kg Hohlleiter mit Temperaturkompensation
EP1909355A2 (de) 2006-10-05 2008-04-09 Com Dev International Limited Anordnungen zur Wärmeausdehnungskompensation
EP2006951A1 (de) * 2007-06-22 2008-12-24 Thales Mechanische Vorrichtung zur Temperaturkompensation für Wellenleiter mit Phasenstabilität

Also Published As

Publication number Publication date
CA2725016A1 (fr) 2011-06-23
FR2954597B1 (fr) 2015-01-02
US20110148551A1 (en) 2011-06-23
CN102185171B (zh) 2014-12-03
US8604894B2 (en) 2013-12-10
JP2011135578A (ja) 2011-07-07
ES2493716T3 (es) 2014-09-12
RU2010152695A (ru) 2012-06-27
FR2954597A1 (fr) 2011-06-24
EP2348571B1 (de) 2014-06-25
CN102185171A (zh) 2011-09-14
JP5716246B2 (ja) 2015-05-13
RU2576589C2 (ru) 2016-03-10
CA2725016C (fr) 2017-02-28

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