EP1655802B1 - Regelbares temperaturkompensiertes System für Mikrowellenresonatoren - Google Patents

Regelbares temperaturkompensiertes System für Mikrowellenresonatoren Download PDF

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Publication number
EP1655802B1
EP1655802B1 EP05110380A EP05110380A EP1655802B1 EP 1655802 B1 EP1655802 B1 EP 1655802B1 EP 05110380 A EP05110380 A EP 05110380A EP 05110380 A EP05110380 A EP 05110380A EP 1655802 B1 EP1655802 B1 EP 1655802B1
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EP
European Patent Office
Prior art keywords
cavity
temperature compensation
resonator
screw
cap
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EP05110380A
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English (en)
French (fr)
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EP1655802A1 (de
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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
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators

Definitions

  • the invention relates to microwave resonators that are generally used in the field of terrestrial or space communications.
  • 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 the bandwidth of the filter.
  • the changes in size of a resonant cavity may be due to expansion or contraction of the walls of the cavity caused by changes in temperature, all the more important as the material has a high rate of thermal expansion.
  • a first material with a very low thermal expansion rate such as Invar (registered mark) is used.
  • the second material used is generally aluminum, a material that has a higher thermal expansion rate than the Invar but which in addition has, in addition to its low density and therefore its lightness, a high heat dissipation power, making it particularly suitable for space applications.
  • each temperature compensation device must have dimensions adapted to the length of the resonant cavity with which it is associated or of which it forms part. Temperature compensation devices must be made with dimensions adapted to each cavity of different length.
  • the present invention solves this problem by proposing a system adapted equally well to cavities of the same length as to cavities of different lengths.
  • the proposed invention also makes it possible to propose a temperature compensation system that confers on the resonator a high temperature stability obtained by the adjustment device of said system.
  • the present invention relates to a device comprising a microwave resonator provided with at least one cavity having a predefined resonance frequency, the device also comprising a temperature compensation system made of a material with a very low thermal expansion rate. relative to that of the material in which the cavity is made, mainly characterized in that the temperature compensation system comprises a structure making it possible to counteract the effects induced on the resonator by temperature variations so that the resonance frequency of the cavity remains within a predetermined range, this device being also characterized and in that it comprises a device for adjusting the temperature compensation suitable for modify the volume of the cavity to set the value of the resonant frequency to its predefined value.
  • the adjustment system makes it possible to make a correction of the volume of the cavity by increasing or decreasing it when the compensation is not sufficient in order to obtain a cavity whose resonant frequency corresponds to the predefined resonant frequency.
  • the temperature compensation system and the temperature compensation adjustment device are coupled to each other and coupled to the resonator so as to exert forces on the cavity cover, along an axis corresponding to the axis.
  • longitudinal of the cavity the latter comprising a cylindrical wall having a longitudinal axis and two opposite ends, one of which is closed by the deformable cover.
  • the cover comprises a base closing one end of the cavity and a rod adjoining the base and extending out of the cavity along the longitudinal axis of the latter, so that the device adjustment of the compensation is arranged around this rod, this device being constituted by a constituent element of the temperature compensation system, said element being made of a very low thermal expansion rate material.
  • the device for adjusting the compensation is produced by means of a hollow-axis screw inside which the cap rod passes, the screw comprising a thread on its outer wall.
  • the temperature compensation system comprises two bars made of a material having a very low thermal expansion rate, these bars are arranged diametrically opposite around the cavity and the cavity has two fins on each of which is fixed one of the bars.
  • the bars are located on either side of the base of the cover and are coupled to each other above this base by means of a stirrup provided with a threaded passage for the hollow-axis screw and the stem of the cover passing through the screw.
  • the compensation adjustment device comprises a counter nut screwed above the stirrup around the screw.
  • the wall forming the cavity of the resonator and its fins is made of aluminum and the compensation adjustment screw is made in invar.
  • the device 1 illustrated on the figure 1 comprises at least one microwave resonator 10, a temperature compensation system 20 for this resonator and a compensation adjustment device 40.
  • the temperature compensation system comprises the compensation adjustment device. 40.
  • the compensation system 20 makes it possible to compensate for the volume variations of the cavity of the resonator induced by an increase in temperature by modifying the volume of this cavity so that the resonant frequency of the cavity remains within a predetermined range.
  • the adjustment system makes it possible to make a correction of the volume of the cavity by increasing or decreasing it when the compensation is not sufficient in order to obtain a cavity whose resonance frequency corresponds to the predefined resonant frequency, i.e. the resonant frequency of the cavity when operating under normal temperature conditions.
  • the temperature compensation and adjustment system proposed according to the invention thus makes it possible to maintain the resonant frequency of a resonator despite the temperature variations to which it can be subjected and this, even if the cavities of the resonators have lengths slightly different (of the order of mm or a few mm).
  • this system gives the resonator a high temperature stability thanks to the adjustment device.
  • the resonator 10 illustrated on the figure 1 is in the form of a cylindrical cavity 11 provided with a bottom 111 that can be coupled to another cavity (represented on the figure 2 ) and a hood 112.
  • the cover 112 has a cylindrical base 113 fixed to the cavity, extending by a rod 114 of smaller diameter, this rod being located in the longitudinal axis of the cavity 11.
  • the cavity 11 has on its outer wall two diametrically opposed fins 115 and 116, extending substantially over three quarters of its height taken in its upper part that is to say in the direction of the hood.
  • bars 21 and 22 made of a material with a very low rate of thermal expansion.
  • the bars extend on either side of the base of the cover 113 parallel to its longitudinal axis, that is to say to its rod 114.
  • the two bars are fixed at their upper end to a stirrup 30 having a portion 32, fitting the end of the bars 21 and 22 and a transverse portion 33 extending between the bars and having a passage 34 for the rod 114 of the hood, thus encircling the latter through the clamping element 40 of the constituent rod of the temperature compensation system.
  • This element 40 is made of a material with a very low rate of thermal expansion. All of these elements make it possible to obtain temperature compensation.
  • the bars are positioned on either side of the plane of the hood base 113, which is taken as a reference plane with respect to the deformations that the hood may undergo under the effect of the temperature compensation system and the system. setting this compensation.
  • the device for adjusting the temperature compensation comprises the clamping element 40.
  • This element 40 is formed for this purpose in the form of a screw 40 having a hollow shaft of diameter adapted to the diameter of the rod 114 so as to be placed around the stem.
  • the screw enters the threaded passage 34 of the stirrup 30.
  • the screw 40 is threaded on its outer wall, its inner wall is smooth.
  • the rod 114 is smooth, the mounting between the rod 114 and the screw 40 is slippery, the connection between the two elements is by pinching (adhesion) of the screw 40 on the rod 114 with the screws 62 and 63 housed in the head 41 of the screw.
  • the screw 40 can thus be mounted or lowered around the rod 114.
  • a counter nut 50 is placed above the passage formed in the stirrup 30 to fix the position of the screw when the latter is adjusted.
  • the head 41 of the screw 40 is split and forms several parts with elasticity which when tightened cause a pinch of the rod 114.
  • the head 41 of the screw comprises two recesses diametrically opposite to the axis of the rod 114 for the passage of the two screws 62 and 63 disposed in opposition to ensure the tightening of the parts of this head around the rod 114.
  • the bars 21, 22 and the screw 40 are in a very low thermal expansion material material such as Invar®.
  • the resonator 10, namely the cavity 11, its fins 115, 116 and the cover 112 are made of a material having a high thermal dissipation capacity, such as aluminum, but with a thermal expansion rate greater than that of the bars 21 and 22 and the screw 40.
  • the temperature compensation system comprises the two bars connected to the cavity and also to the hood via the stirrup and the screw.
  • the position of the screw 40 is adjusted after resonance frequency measurements made under the actual operating conditions of the resonator, that is to say after having subjected the resonator to the temperatures in which it will be made to operate.
  • the resonant frequency remains within a predetermined range of values.
  • the compensation is then adjusted by screwing or unscrewing the screw 40 so as to bring the resonance frequency to the predefined value.
  • the adjustment device 40 provides a latitude of about +/- 10% over the nominal compensation exerted by the bars and the screw, this latitude is obtained by adjusting the position of the screw.
  • the figure 2 illustrates an overview of a device according to the invention.
  • the resonator comprises two resonant cavities which are coupled and carry respectively the references 10 and 90.
  • Each resonant cavity is equipped with a temperature compensation system 20 and a compensation adjustment device 40 in accordance with the present invention. invention.
  • the entrance of signal is visible on the cavity 90 and bears the reference 91.
  • the clamping screws 62, 63 of the rod 114 are visible in this figure and on the figure 3 .
  • the figure 3 allows to illustrate the conformation of the head 41 of the screw 40 compensation adjustment.

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  • Control Of Motors That Do Not Use Commutators (AREA)

Claims (8)

  1. Vorrichtung mit einem Mikrowellenresonator, der mit mindestens einem Hohlraum (10) mit einer vordefinierten Resonanzfrequenz ausgestattet ist, wobei die Vorrichtung ebenfalls ein Temperaturkompensationssystem (20) enthält, das aus einem Material mit sehr geringer thermischer Expansionsrate bezüglich derjenigen des Materials hergestellt ist, aus dem der Hohlraum hergestellt ist, wobei das Temperaturkompensationssystem (20) einen Aufbau aufweist, der es ermöglicht, gegen die im Resonator durch Temperaturschwankungen induzierten Wirkungen zu reagieren, damit die Resonanzfrequenz des Hohlraums in einem vorbestimmten Bereich bleibt, wobei der Hohlraum (10) eine zylindrische Wand enthält, die eine Längsachse (A) und zwei gegenüberliegende Enden hat, von denen eines von einer verformbaren Haube (113) verschlossen wird, und das Temperaturkompensationssystem so mit dem Resonator gekoppelt ist, dass es auf die Haube des Hohlraums gemäß einer Achse entsprechend der Längsachse (A) des Hohlraums Kräfte ausübt, dadurch gekennzeichnet, dass das Temperaturkompensationssystem (20) zwei Stäbe (21, 22) enthält, die aus einem Material bestehen, das eine sehr geringe thermische Expansionsrate hat, wobei diese Stäbe um den Hohlraum herum einander diametral gegenüber und zu beiden Seiten der Basis der Haube (112) angeordnet und miteinander oberhalb dieser Basis mittels eines Bügels (30) gekoppelt sind, wobei der Hohlraum zwei Flügel (115, 116) hat, an jedem von denen einer der Stäbe befestigt ist.
  2. Vorrichtung mit einem mit mindestens einem Hohlraum ausgestatteten Mikrowellenresonator nach Anspruch 1, dadurch gekennzeichnet, dass sie außerdem eine Vorrichtung zum Einstellen der Temperaturkompensation (40) aufweist, die das Volumen des Hohlraums korrigieren kann, um den Wert der Frequenzresonanz auf ihren vordefinierten Wert einzustellen, wenn die Kompensation nicht ausreichend ist, wobei das Temperaturkompensationssystem und die Vorrichtung zum Einstellen der Temperaturkompensation miteinander und mit dem Resonator so gekoppelt sind, dass sie auf die Haube des Hohlraums Kräfte gemäß einer Achse ausüben, die der Längsachse (A) des Hohlraums entspricht.
  3. Vorrichtung mit einem mit mindestens einem Hohlraum ausgestatteten Mikrowellenresonator nach Anspruch 2, dadurch gekennzeichnet, dass die Haube eine Basis (112), die ein Ende des Hohlraums verschließt, und eine Stange (114) enthält, die an die Basis anschließt und sich aus dem Hohlraum gemäß der Längsachse dieses letzteren erstreckt, wobei die Vorrichtung zum Einstellen der Kompensation um diese Stange herum angeordnet ist und aus einem Bestandteil (40) des Temperaturkompensationssystems (20) besteht.
  4. Vorrichtung mit einem mit mindestens einem Hohlraum ausgestatteten Mikrowellenresonator nach Anspruch 3, dadurch gekennzeichnet, dass die Vorrichtung zum Einstellen der Kompensation (40) mittels einer Schraube mit Hohlachse hergestellt wird, durch deren Inneres die Stange (114) der Haube geht, wobei die Schraube aus einem Material mit sehr geringer Expansionsrate hergestellt ist und ein Gewinde (60) auf ihrer Außenwand aufweist.
  5. Vorrichtung mit einem mit mindestens einem Hohlraum ausgestatteten Mikrowellenresonator nach Anspruch 4, dadurch gekennzeichnet, dass der Bügel (30) mit einem Gewindedurchgang (34) für die Schraube mit Hohlachse (40) und die die Schraube durchquerende Stange (114) der Haube versehen ist.
  6. Vorrichtung mit einem mit mindestens einem Hohlraum ausgestatteten Mikrowellenresonator nach Anspruch 5, dadurch gekennzeichnet, dass die Vorrichtung zum Einstellen der Kompensation (40) eine Gegenmutter (50) aufweist, die oberhalb des Bügels (30) um die Schraube (40) herum geschraubt wird.
  7. Vorrichtung mit einem mit mindestens einem Hohlraum ausgestatteten Mikrowellenresonator nach Anspruch 6, dadurch gekennzeichnet, dass die den Hohlraum des Resonators und seine Flügel bildende Wand aus Aluminium hergestellt wird.
  8. Vorrichtung mit einem mit mindestens einem Hohlraum ausgestatteten Mikrowellenresonator nach Anspruch 4, dadurch gekennzeichnet, dass die Schraube zum Einstellen der Kompensation aus Invar hergestellt ist.
EP05110380A 2004-11-09 2005-11-04 Regelbares temperaturkompensiertes System für Mikrowellenresonatoren Active EP1655802B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0452568A FR2877773B1 (fr) 2004-11-09 2004-11-09 Systeme de compensation en temperature reglable pour resonateur micro-ondes

Publications (2)

Publication Number Publication Date
EP1655802A1 EP1655802A1 (de) 2006-05-10
EP1655802B1 true EP1655802B1 (de) 2009-10-14

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EP05110380A Active EP1655802B1 (de) 2004-11-09 2005-11-04 Regelbares temperaturkompensiertes System für Mikrowellenresonatoren

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US (1) US7453337B2 (de)
EP (1) EP1655802B1 (de)
CN (1) CN1812188B (de)
AT (1) ATE445920T1 (de)
CA (1) CA2523371C (de)
DE (1) DE602005017108D1 (de)
ES (1) ES2334038T3 (de)
FR (1) FR2877773B1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005001298A1 (de) * 2005-01-03 2006-07-13 Hydac Electronic Gmbh Vorrichtung zum Messen von Kräften, insbesondere Drucksensor, und zugehöriges Herstellverfahren
US7564327B2 (en) 2006-10-05 2009-07-21 Com Dev International Ltd. Thermal expansion compensation assemblies
FR2917904B1 (fr) * 2007-06-22 2009-09-18 Thales Sa Dispositif mecanique de compensation en temperature pour guide d'onde a stabilite de phase
FR2945673B1 (fr) 2009-05-15 2012-04-06 Thales Sa Dispositif de paroi flexible multi-membranes pour filtres et multiplexeurs de technologie thermo-compensee
FR2965668B1 (fr) * 2010-10-01 2013-05-10 Thales Sa Filtre hyperfrequence a resonateur dielectrique
FR3005209B1 (fr) 2013-04-26 2015-04-10 Thales Sa Filtre hyperfrequence avec element dielectrique
CN104347919B (zh) * 2013-08-08 2017-08-25 北京飞卡科技有限公司 一种用于微波滤波器的温度补偿装置及其温度补偿方法
CN106063028B (zh) * 2015-01-13 2018-11-23 日本电业工作株式会社 谐振器和滤波器
CN112164883B (zh) * 2020-08-21 2022-09-23 西安空间无线电技术研究所 一种温变环境下保持次层间压力的分层式馈电结构

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US2215582A (en) * 1938-02-02 1940-09-24 Rca Corp Resonant line and associated circuit
US2716222A (en) * 1951-07-17 1955-08-23 Louis D Smullin Temperature compensated cavity resonator
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CH541873A (de) * 1972-07-24 1973-09-15 Siemens Ag Albis Zylindrischer Hohlraumresonator
JPS5387149A (en) * 1977-01-11 1978-08-01 Mitsubishi Electric Corp Cylindrical cavity resonator
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IT1185323B (it) * 1985-07-29 1987-11-12 Gte Telecom Spa Cavita' metallica a microonde
US5374911A (en) * 1993-04-21 1994-12-20 Hughes Aircraft Company Tandem cavity thermal compensation
DE19859028A1 (de) * 1998-12-21 2000-06-29 Bosch Gmbh Robert Frequenzstabilisierte Hohlleiteranordnung
US6535087B1 (en) * 2000-08-29 2003-03-18 Com Dev Limited Microwave resonator having an external temperature compensator

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Publication number Publication date
CA2523371C (fr) 2011-01-25
CA2523371A1 (fr) 2006-05-09
DE602005017108D1 (de) 2009-11-26
CN1812188A (zh) 2006-08-02
EP1655802A1 (de) 2006-05-10
US20060097827A1 (en) 2006-05-11
US7453337B2 (en) 2008-11-18
CN1812188B (zh) 2013-04-03
FR2877773B1 (fr) 2007-05-04
FR2877773A1 (fr) 2006-05-12
ATE445920T1 (de) 2009-10-15
ES2334038T3 (es) 2010-03-04

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