EP2256854B1 - Dispositif de paroi flexible multi-membranes pour filtres et multiplexeurs de technologie thermo-compensée - Google Patents

Dispositif de paroi flexible multi-membranes pour filtres et multiplexeurs de technologie thermo-compensée Download PDF

Info

Publication number: EP2256854B1
Authority: EP; European Patent Office
Prior art keywords: flexible; membranes; flexible wall; wall device; constituted
Prior art date: 2009-05-15
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.): Active

Application number

EP10159840A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP2256854A1 (fr

Inventor

Joël Lagorsse

Michel Blanquet

Emmanuel Hayard

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.)

Thales SA

Original Assignee

Thales 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.)

2009-05-15

Filing date

2010-04-14

Publication date

2012-12-05

2010-04-14 Application filed by Thales SA filed Critical Thales SA

2010-12-01 Publication of EP2256854A1 publication Critical patent/EP2256854A1/fr

2012-12-05 Application granted granted Critical

2012-12-05 Publication of EP2256854B1 publication Critical patent/EP2256854B1/fr

Status Active legal-status Critical Current

2030-04-14 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
- H01P1/30—Auxiliary devices for compensation of, or protection against, temperature or moisture effects ; for improving power handling capability

Definitions

the present invention relates to microwave resonators generally used in the field of terrestrial or space telecommunications.
It relates to a flexible wall device for resonant cavity microwave filters equipped with a mechanical temperature compensation device.
This invention proposes a solution to the problem of the thermomechanical stresses encountered in the flexible parts subjected to temperature distortion of the filters and the multiplexers, of the known type called OMUX (for Output Multiplexer), with resonant cavity of thermo-compensated technology and strong power.
OMUX Output Multiplexer
thermo-compensated technology refers to any technology aimed at deforming a resonant cavity in temperature so as to compensate for the variation in volume of said resonant cavity, said volume variation being induced. by temperature changes, so as to maintain the resonant frequency of the cavity at the desired value.
This value is usually preset at room temperature conditions around 20 ° C.
a microwave resonator is an electromagnetic circuit tuned to pass energy at a specific resonant frequency.
Microwave resonators can be used to make filters to reject the frequencies of a signal outside the filter bandwidth.
a resonator is in the form of a structure forming a cavity called resonant cavity whose dimensions are defined to obtain the desired resonance frequency.
any change in the dimensions of the cavity introducing a change in volume of the latter causes an offset of its resonant frequency and therefore a change in its electrical properties.
the changes in size of a resonant cavity may arise from dilations or contractions of the walls of the cavity caused by changes in temperature, all the more important that the material has a high rate of thermal expansion, and / or that the temperature variation is high.
thermo-compensation techniques are known.
thermoelastic differential Coupled with a flexible wall, they cause deformation in the direction of a reduction of volume when the temperature increases, or an increase of volume when the temperature decreases.
a first material with a very low thermal expansion rate such as Invar TM is used .
the second material used is generally aluminum, a material that has a higher thermal expansion rate than Invar and which has, in addition to low density, a high thermal conductivity, making it particularly suitable for space applications.
compensated technologies may have limitations of use
Flexibility can be achieved in the case of a circular hood by increasing the distance between the rigid circular portion in the center and the outer rigid circular portion, or by decreasing the thickness of the membrane.
High gradients can be particularly disadvantageous, for example with the use of structurally hardened aluminum alloys, such as aluminum 6061, whose mechanical properties can decrease very rapidly depending on the temperature and the duration of exposure. at this same temperature. It is therefore appropriate to limit the temperature, and therefore the thermal resistance.
a first solution could be to use more thermally conductive materials, but they are generally incompatible in terms of their mechanical properties, or in terms of their thermoelastic properties in combination with the structure of the aluminum resonant cavity.
the most obvious solution is to increase the wall thickness of the OMUX filters, in order to promote the thermal flow to the thermal control system of the satellite payload.
the present invention makes it possible to solve these difficulties by proposing a compatible system of different compensation solutions, and making it possible to reduce by a significant factor the thermal gradient of a flexible cover, and having an impact of only a few grams on the mass of the together.
the present invention therefore complements the current technologies of thermo-compensation for filters and OMUX with resonant cavities. It concerns more precisely the flexible covers of OMUX thermo-compensated. The idea is to optimize the ratio between the thermal resistance and the deformability of said covers.
the invention provides a multi-diaphragm flexible wall device.
This device may also make it possible to reduce the mechanical stresses for a given deformation, while maintaining an equivalent thermal resistance, or to increase the deformation for a level of equivalent mechanical stresses and thermal resistance, and thus to maintain equivalent thermal gradients. for a given dissipated power.
the subject of the invention is a flexible wall device for thermo-compensated technology filter or output multiplexer component, said wall comprising at least two distinct flexible membranes stacked, and said flexible membranes each having a central zone. , an intermediate zone and a peripheral zone in vis-à-vis, in which said flexible membranes are thermally coupled and mechanically on the central zone and on the peripheral zone, and not coupled on the intermediate zone.
said flexible membranes are adapted to deform simultaneously.
said flexible membranes are made of a flexible material, metallic or non-metallic.
the flexible membranes may be made of materials that are distinct from each other.
said flexible membranes are made of aluminum.
each membrane consists of a combination of distinct materials.
each membrane may consist of a bimetallic material.
the various membranes of the flexible wall according to the invention are assembled according to at least one of the following methods: screwing; hooping; brazing; thermal bonding; electric welding.
a temperature deformation of said flexible wall can be obtained by means of an external device.
a temperature deformation of said flexible wall can be obtained by means of a deformation of at least one of said flexible membranes.
At least one of said flexible membranes comprises a bimetallic material, said bimetal material participating in said temperature deformation of the flexible wall.
Said flexible wall may comprise exactly two membranes.
said flexible wall comprises exactly three membranes.
each of said flexible membranes has a thickness of between two and four tenths of a millimeter.
thermo-compensated technology filter comprising at least one resonant cavity closed by a flexible cover device, said flexible cover consisting of a flexible wall according to the invention.
thermo-compensated technology filter may comprise a piston cooperating with said membranes, so as to allow an optimization of the control of the volume of said resonant cavity.
thermo-compensated output multiplexer having at least two channels each comprising a resonant cavity closed by a flexible cover device, said flexible cover consisting of a flexible wall according to the invention.
the figure 1 presents a partial diagram of an example of an OMUX channel.
This channel consists of a cavity 2a, closed by a flexible cover 1a which is associated with a piston 3.
a certain power P is dissipated in the channel; some of this power P is dissipated on the surface of the piston.
This dissipated power P causes a rise in the temperature within the channel.
the flexible cover 1a has a thermal resistance Rth between the center and the edge of said cover 1a.
a warmer zone tends to form in the center of the hood 1a.
the thermal gradient is low if the thermal resistance is low. Therefore, it appears desirable to have the lowest possible heat resistance Rth in order to avoid excessive temperature rise at the center of the flexible cover 1a.
the thermal resistance of the cover 1a is related to the nature of the material constituting the cover 1a, typically aluminum, which has a certain thermal conductivity, and the thickness of the flexible cover. The thicker the hood, the lower the thermal resistance. However, it is essential that the flexible cover 1a retains its mechanical characteristics, particularly in terms of deformability, which prohibits excessive thickness.
the challenge of the present invention is to provide a solution for reconciling a low thermal resistance and mechanical characteristics that allow a high ability to deform the flexible cover of a channel within an OMUX.
Figures 2a , 3a , 4a , 5a multi-diaphragm hoods while the figures 2b , 3b , 4b , 5b relate to multiple diaphragm caps screwed.
the multiple membranes of the flexible walls according to the invention can be fixed to one another by other technological processes, in particular soldering, thermal bonding or electrical welding.
Said membranes are preferably made of aluminum but other suitable materials can be used, such as for example copper.
the use of different materials for the membranes of the same multi-membrane flexible wall can also be envisaged.
the figure 2a presents the principle of the invention applied by way of example to a cover that can close a resonant cavity of an OMUX channel.
the flexible cover 1b here consists of several membranes 10, 11, associated with a piston 14.
the membranes 10, 11 are fretted; on the figure 2b , the principle is exactly the same, apart from the fact that the membranes 10, 11 are screwed with the help of the fixing means 100.
a multi-diaphragm flexible cover 1b provides a widely extended margin of maneuver in the context of the optimization of the thermal resistance and mechanical stresses existing within a thermo-compensated cavity technology .
flexible membranes 10, 11 of limited thickness typically between 0.2 millimeters and 0.4 millimeters, for a three-membrane cap with a cumulative thickness of the order of 1.2 millimeters, so as to retain for example the same characteristics in terms of mechanical stresses as the flexible cover of the figure 1 , while decreasing the total thermal resistance of said hood 1b.
the invention provides for coupling thermally and mechanically between them membranes 10, 11, but only on a portion of their surface, as clearly shown by the figures 3a and 3b .
the figures 3a and 3b correspond to cross sections of a multi-membrane flexible cover 1b, according to the invention.
the covers 1b shown on the figures 3a , 3b comprise a stack of three membranes 10, 11, 12, which causes both an increase in the thermal section of the cover 1b and a maintenance of the level of mechanical stresses exerted on said covers 1b.
the three membranes 10, 11, 12 of the flexible cover 1b are interconnected, by hooping on the figure 3a and by screwing on the figure 3b on central zone C and on a peripheral zone P, these central zones C and peripheral P enabling the mechanical and thermal coupling of the membranes. Outside these areas, the membranes are separated, so that the multi-membrane hood 1b acquires significant flexibility.
the thermal and mechanical coupling on the central C and peripheral P zones makes it possible to maximize the mechanical stresses and to minimize the thermal resistance of the cover 1b, while the decoupling of the membranes on the intermediate zone I confers on the cover 1b its flexibility , its flexibility.
FIGS. 4a and 4b allow to visualize a cover 1b with three membranes 10, 11, 12 shrunk, respectively screwed, according to the present invention.
FIG. 5a thus has a flexible cover 1b 'with two membranes 10', 11 'hooped while the figure 5b has a flexible cover 1b 'with two membranes 10', 11 'screwed.
Figures 2a , 2b , 3a , 3b , 4a , 4b , 5a , 5b the different layers 10, 11, 12, respectively 10 ', 11', are moreover stacked around a handle 13 which allows them to be held in position.
the figure 6 represents an example of a complete channel according to the invention, comprising a cover consisting of a flexible multi-membrane wall, the external compensation system not being shown.
a multi-diaphragm flexible wall can cooperate with a piston in order to optimize the volume control of a resonant cavity, in the context of a suitable thermo-compensation technology. to filters or OMUX.

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EP10159840A 2009-05-15 2010-04-14 Dispositif de paroi flexible multi-membranes pour filtres et multiplexeurs de technologie thermo-compensée Active EP2256854B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR0902369A FR2945673B1 (fr)	2009-05-15	2009-05-15	Dispositif de paroi flexible multi-membranes pour filtres et multiplexeurs de technologie thermo-compensee

Publications (2)

Publication Number	Publication Date
EP2256854A1 EP2256854A1 (fr)	2010-12-01
EP2256854B1 true EP2256854B1 (fr)	2012-12-05

Family

ID=41650434

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP10159840A Active EP2256854B1 (fr)	2009-05-15	2010-04-14	Dispositif de paroi flexible multi-membranes pour filtres et multiplexeurs de technologie thermo-compensée

Country Status (8)

Country	Link
US (1)	US8432238B2 (zh)
EP (1)	EP2256854B1 (zh)
JP (1)	JP5581535B2 (zh)
CN (1)	CN101888007B (zh)
CA (1)	CA2702571C (zh)
ES (1)	ES2398513T3 (zh)
FR (1)	FR2945673B1 (zh)
RU (1)	RU2519536C2 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP6404721B2 (ja) *	2015-01-16	2018-10-17	国立大学法人東京大学	光学素子

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JPS605081B2 (ja) *	1980-05-26	1985-02-08	住友電気工業株式会社	空胴共振器
CA1152169A (en) *	1982-08-25	1983-08-16	Adrian V. Collins	Temperature compensated resonant cavity
US4677403A (en) *	1985-12-16	1987-06-30	Hughes Aircraft Company	Temperature compensated microwave resonator
FI89644C (fi) *	1991-10-31	1993-10-25	Lk Products Oy	Temperaturkompenserad resonator
JPH05335818A (ja) *	1992-06-01	1993-12-17	Murata Mfg Co Ltd	共振周波数調整機構を有する空胴または誘電体共振器
US5374911A (en) *	1993-04-21	1994-12-20	Hughes Aircraft Company	Tandem cavity thermal compensation
DE4319886C1 (de) *	1993-06-16	1994-07-28	Ant Nachrichtentech	Anordnung zum Kompensieren temperaturabhängiger Volumenänderungen eines Hohlleiters
CA2187829C (en) *	1996-10-15	1998-10-06	Steven Barton Lundquist	Temperature compensated microwave filter
US6002310A (en) *	1998-02-27	1999-12-14	Hughes Electronics Corporation	Resonator cavity end wall assembly
SE519554C2 (sv) *	1999-04-14	2003-03-11	Ericsson Telefon Ab L M	Skruvanordning samt trimanordning innefattande en sådan skruvanordning för trimning av ett kavitetsfilters frekvensförhållande eller kopplingsgrad
EP1227876A1 (de) *	2000-02-17	2002-08-07	Gambro Dialysatoren GmbH & Co. KG	Filter mit membranen aus hohlfasern
ATE461537T1 (de) *	2000-06-15	2010-04-15	Panasonic Corp	Resonator und hochfrequenzfilter
JP3512178B2 (ja) *	2000-06-15	2004-03-29	松下電器産業株式会社	共振器及び高周波フィルタ
US6535087B1 (en)	2000-08-29	2003-03-18	Com Dev Limited	Microwave resonator having an external temperature compensator
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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
FR2877773B1 (fr)	2004-11-09	2007-05-04	Cit Alcatel	Systeme de compensation en temperature reglable pour resonateur micro-ondes
RU2329573C2 (ru) *	2006-06-23	2008-07-20	Федеральное государственное унитарное предприятие "Российский научно-исследовательский институт космического приборостроения"	Мембрана свч-фильтра
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FR2917904B1 (fr) *	2007-06-22	2009-09-18	Thales Sa	Dispositif mecanique de compensation en temperature pour guide d'onde a stabilite de phase

2009
- 2009-05-15 FR FR0902369A patent/FR2945673B1/fr active Active
2010
- 2010-04-14 ES ES10159840T patent/ES2398513T3/es active Active
- 2010-04-14 EP EP10159840A patent/EP2256854B1/fr active Active
- 2010-04-30 CA CA2702571A patent/CA2702571C/en active Active
- 2010-05-12 US US12/778,919 patent/US8432238B2/en active Active
- 2010-05-13 JP JP2010110963A patent/JP5581535B2/ja not_active Expired - Fee Related
- 2010-05-13 CN CN201010181041.7A patent/CN101888007B/zh not_active Expired - Fee Related
- 2010-05-14 RU RU2010119519/08A patent/RU2519536C2/ru not_active IP Right Cessation

Also Published As

Publication number	Publication date
JP2010268459A (ja)	2010-11-25
CN101888007B (zh)	2014-05-21
JP5581535B2 (ja)	2014-09-03
ES2398513T3 (es)	2013-03-19
RU2010119519A (ru)	2011-11-20
CA2702571A1 (en)	2010-11-15
US8432238B2 (en)	2013-04-30
RU2519536C2 (ru)	2014-06-10
EP2256854A1 (fr)	2010-12-01
US20100315180A1 (en)	2010-12-16
FR2945673A1 (fr)	2010-11-19
FR2945673B1 (fr)	2012-04-06
CN101888007A (zh)	2010-11-17
CA2702571C (en)	2017-11-14

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