EP0117804B1 - Procédé de fabrication d'une cavité hyperfréquence, et cavité obtenue par ce procédé - Google Patents
Procédé de fabrication d'une cavité hyperfréquence, et cavité obtenue par ce procédé Download PDFInfo
- Publication number
- EP0117804B1 EP0117804B1 EP84400297A EP84400297A EP0117804B1 EP 0117804 B1 EP0117804 B1 EP 0117804B1 EP 84400297 A EP84400297 A EP 84400297A EP 84400297 A EP84400297 A EP 84400297A EP 0117804 B1 EP0117804 B1 EP 0117804B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity
- components
- metal
- process according
- microwave
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/008—Manufacturing resonators
-
- 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 present invention relates to a method of manufacturing a microwave cavity and a cavity obtained by this method.
- a microwave cavity is constituted by a dielectric medium, generally air or vacuum, surrounded by a metallic envelope forming an enclosure and the dimensions of which are determined to cause inside the enclosure the resonance of an electromagnetic wave.
- the cavities are obtained either by mechanical assembly of parts machined from an iron-nickel alloy material, or by mechanical assembly of parts made of composite synthetic fibers / resin, metallic. These two solutions make it possible to obtain both a low coefficient of expansion and good mechanical rigidity.
- Iron-nickel alloy cavities are heavy, which is a disadvantageous factor for their use in satellites. To reduce their weight, we seek to reduce the thickness of the envelope but below a certain thickness, it is no longer possible to machine the cavity without causing deformations.
- the cavities made of synthetic materials for example carbon fiber
- the object of the invention is to overcome the aforementioned drawbacks.
- the subject of the invention is a method of manufacturing a microwave cavity according to which the various elements of the cavity are preformed before their assembly, the preformed elements then being covered by at least one metallic layer which is good conductor of electricity. , these various elements then being positioned to form the cavity, then all of these elements being fixed to one another by melting then cooling of the deposited metal covering said elements of the cavity, the melting of the deposited metal taking place in a single operation in a furnace brought to the melting temperature, characterized in that the adjacent elements constituting the cavity being of small thickness are kept in position before and during the melting operation by welding of metallic objects, of small dimension compared to the elements of the cavity, brought into contact with adjacent elements.
- the main advantage of this process is that, thanks to the fusion of the deposited metal, on the one hand, the mechanical connection of the elementary parts to each other and, on the other hand, ensures perfect electrical continuity between the internal walls of the cavities, obtained since, the metallic deposits covering each elementary part merge to form a homogeneous crystal structure.
- each of the parts 1, 2 and 3 is covered by successive deposits 5, 6, 7 of materials which are good conductors of electricity, constituted for example, in the case where the parts are made of iron-nickel, by a first layer of copper and a second layer of silver, the whole having an approximately equal thickness at 5 microns or higher, depending on the frequency of the electromagnetic wave which must resonate inside the cavity.
- the copper layer serves as an adhesion layer to fix the silver layer.
- the parts 1, 2 and 3 forming the elements of the cavity are positioned relatively with respect to each other according to the method of assembly shown in FIG. 1, to form the cavity.
- Steel balls 8 to 11 are each welded between two adjacent elements to ensure a rigid mechanical connection of all the elements together before the next brazing operation.
- the faces of the bottom 2 and of the cover 3, in contact with the ends of the section 1, have surfaces different from those of the end sections respectively in contact with the section 1, to allow each ball to be able to abut, in the angle formed by the adjacent parts which it connects.
- the welding of the balls between each adjacent part is carried out, in a preferred embodiment of the invention, by a spot welding process consisting in carrying out an electrical discharge between each of the balls and the corresponding adjacent parts or elements to be connected.
- the ball will, for example, first be held at the end of an electric current supply electrode by means of a vacuum gripper of known type, but not shown, then will be applied in contact with adjacent parts to be connected.
- the electric power involved is determined for each type of cavity depending in particular on the thickness of the metal deposit covering each part or element e must be sufficient to allow the ball to pass through the deposit and weld on the underlying metal parts , without damaging them.
- the fourth step of the method consists in carrying out the final assembly by brazing together preassembled parts in the third step, in an oven brought to high temperature, or any other equivalent means, to achieve the melting of the metal deposit covering metal parts 1 , 2 and 3 in one or more operations.
- the cavity thus assembled is cooled slowly to obtain a simultaneous connection of all the parts which have been heated.
- the method according to the invention makes it possible to obtain simultaneous brazing of pieces of about 4/10 0 mm in iron-nickel preassembled of a cavity, covered with a thickness of a deposit of copper and d money of 5 u. by melting the deposit at a temperature of up to 850 ° C.
- the electrical surface conductivity of the internal walls of the cavity needs to be improved.
- the process which has just been described can advantageously be supplemented by an electrolytic deposit of additional silver.
- the filter of Figure 2 consists of two cavities placed end to end.
- a first cavity comprises the same elements as the cavity in FIG. 1, identified by the same references 1 to 4 and the second cavity is constituted by a section 12 of which one end is placed in contact with the cover 3 of the first cavity and whose the other end is closed by a cover 13 pierced in its center by an iris 14.
- the elements of the filter are produced in isolation and then assembled by ball welds such as balls 8 to 11 and 16 to 18 shown in Figure 2.
- the method of pre-assembly which has just been described eliminates the use of complicated tools that could be used to pre-assemble the elementary parts before the brazing operation, it is necessary understand that this method of pre-assembly does not exclude the use of other tools.
- other objects of any shape may be used instead of balls, which can advantageously replace the balls, to hold the elementary parts together during the brazing operation and, in certain cases, proceed in certain cases. to a direct spot weld of the adjacent joined elements without using intermediate steel objects.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8303126A FR2541826B1 (fr) | 1983-02-25 | 1983-02-25 | Procede de fabrication d'une cavite hyperfrequence et cavite obtenue par ce procede |
FR8303126 | 1983-02-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0117804A1 EP0117804A1 (fr) | 1984-09-05 |
EP0117804B1 true EP0117804B1 (fr) | 1989-03-22 |
Family
ID=9286271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84400297A Expired EP0117804B1 (fr) | 1983-02-25 | 1984-02-14 | Procédé de fabrication d'une cavité hyperfréquence, et cavité obtenue par ce procédé |
Country Status (6)
Country | Link |
---|---|
US (1) | US4578658A (ja) |
EP (1) | EP0117804B1 (ja) |
JP (1) | JPS59163901A (ja) |
CA (1) | CA1216332A (ja) |
DE (1) | DE3477449D1 (ja) |
FR (1) | FR2541826B1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5044546A (en) * | 1986-11-10 | 1991-09-03 | Hazeltine Corporation | Process for bonding aluminum sheets with cadmium and product thereof |
US5151332A (en) * | 1986-11-10 | 1992-09-29 | Hazeltine Corporation | Aluminum sheets bonded with cadmium |
JPH0412570U (ja) * | 1990-05-18 | 1992-01-31 | ||
DE19642673A1 (de) * | 1996-10-16 | 1998-04-23 | Widia Gmbh | Mikrowellenofen und Bauteile hierfür |
EP0924791B1 (de) * | 1997-12-16 | 2004-03-03 | Spinner GmbH Elektrotechnische Fabrik | Bandpassfilter |
US6727787B2 (en) * | 2000-12-21 | 2004-04-27 | The Charles Stark Draper Laboratory, Inc. | Method and device for achieving a high-Q microwave resonant cavity |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2981908A (en) * | 1958-12-15 | 1961-04-25 | Jr Moody C Thompson | Cavity resonator |
US3157847A (en) * | 1961-07-11 | 1964-11-17 | Robert M Williams | Multilayered waveguide circuitry formed by stacking plates having surface grooves |
DE1590530B1 (de) * | 1963-10-26 | 1971-10-07 | Kuhn Hans Dipl Phys | Verfahren zur herstellung von mikrowellenbauteilen |
US3529267A (en) * | 1967-10-20 | 1970-09-15 | Corning Glass Works | Microwave cavity resonator using coated fused silica or glass ceramic |
JPS509784A (ja) * | 1973-06-01 | 1975-01-31 | ||
HU172698B (hu) * | 1976-09-30 | 1978-11-28 | Finommech Vallalat | Sposob dlja prisoedinenija tokoprovodjahhikh ehlementov sbornoj chasti i pri pomohhi ehtogo dlja izgotovlenija sbornoj chasti |
US4260967A (en) * | 1979-03-26 | 1981-04-07 | Communications Satellite Corporation | High power waveguide filter |
-
1983
- 1983-02-25 FR FR8303126A patent/FR2541826B1/fr not_active Expired
-
1984
- 1984-02-14 EP EP84400297A patent/EP0117804B1/fr not_active Expired
- 1984-02-14 DE DE8484400297T patent/DE3477449D1/de not_active Expired
- 1984-02-21 US US06/582,230 patent/US4578658A/en not_active Expired - Lifetime
- 1984-02-21 CA CA000447941A patent/CA1216332A/en not_active Expired
- 1984-02-24 JP JP59032740A patent/JPS59163901A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS59163901A (ja) | 1984-09-17 |
FR2541826A1 (fr) | 1984-08-31 |
EP0117804A1 (fr) | 1984-09-05 |
JPH0223082B2 (ja) | 1990-05-22 |
FR2541826B1 (fr) | 1985-07-05 |
DE3477449D1 (en) | 1989-04-27 |
CA1216332A (en) | 1987-01-06 |
US4578658A (en) | 1986-03-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2549296A1 (fr) | Procede de fabrication d'une pile solaire | |
EP0007873B1 (fr) | Système de soudure d'un composant semiconducteur émetteur de lumière sur un socle métallique | |
FR2831714A1 (fr) | Assemblage de cellules photovoltaiques | |
EP0803949B1 (fr) | Dispositif laser à diodes | |
FR2723633A1 (fr) | Panneau sandwich a nid d'abeilles contenant des tubes de chaleur integres | |
FR2641646A1 (fr) | Cellule solaire et son procede de fabrication | |
EP0117804B1 (fr) | Procédé de fabrication d'une cavité hyperfréquence, et cavité obtenue par ce procédé | |
WO2004075246A2 (fr) | Module photovoltaique comportant des bornes de connexion avec l’exterieur | |
EP2919939B1 (fr) | Soudage heterogene aluminium/cuivre | |
EP2122728A1 (fr) | Plaque bipolaire pour pile a combustible a membrane polymere | |
WO2017157794A1 (fr) | Procede de soudage entre un element conducteur et un pole de batterie | |
FR2834122A1 (fr) | Procede de fabrication d'electrodes et tube electronique a vide utilisant ce procede | |
FR2508233A1 (fr) | Procede de realisation d'un composant unitaire comportant une diode oscillatrice et une diode a capacite variable et emetteur accordable en frequence comprenant un tel composant unitaire | |
WO2002078088A1 (fr) | Assemblage de composants d'epaisseurs diverses | |
EP1889342A2 (fr) | Dispositif laser forme par un empilement de diodes laser | |
FR2460035A1 (fr) | Canon electronique pour tubes a rayons cathodiques et son procede de fabrication | |
FR2499282A1 (fr) | Tete magnetique comportant des lamelles soudees par points en al-fe-si | |
FR2724495A1 (fr) | Pile de barrettes de diodes laser, et son procede d'assemblage | |
FR3056856B1 (fr) | Element, module et generateur thermoelectriques pour vehicule a moteur thermique et procede de fabrication du module | |
FR2474239A1 (fr) | Lentilles electroniques pour canons a electrons, notamment pour tubes images de television | |
FR2867608A1 (fr) | Refroidisseur pour composant electronique de puissance | |
FR3139742A1 (fr) | Procédé de soudage par point | |
FR3139662A1 (fr) | Fusible | |
EP0237801A1 (fr) | Laser comportant au moins un joint d'étanchéité | |
FR2751472A1 (fr) | Canal dephaseur pour lentille de depointage d'antenne hyperfrequence, et procede d'assemblage d'un tel canal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): DE GB IT |
|
17P | Request for examination filed |
Effective date: 19850226 |
|
17Q | First examination report despatched |
Effective date: 19861202 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ALCATEL ESPACE SOCIETE ANONYME DITE |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE GB IT |
|
REF | Corresponds to: |
Ref document number: 3477449 Country of ref document: DE Date of ref document: 19890427 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
ITF | It: translation for a ep patent filed |
Owner name: JACOBACCI & PERANI S.P.A. |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
ITTA | It: last paid annual fee | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19980112 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19980123 Year of fee payment: 15 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19990214 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19990214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19991201 |