EP2920839B1 - Filtre haute fréquence avec stabilisation de fréquence - Google Patents

Filtre haute fréquence avec stabilisation de fréquence Download PDF

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Publication number
EP2920839B1
EP2920839B1 EP13792595.4A EP13792595A EP2920839B1 EP 2920839 B1 EP2920839 B1 EP 2920839B1 EP 13792595 A EP13792595 A EP 13792595A EP 2920839 B1 EP2920839 B1 EP 2920839B1
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EP
European Patent Office
Prior art keywords
housing
housing cover
frequency filter
radio
internal conductor
Prior art date
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EP13792595.4A
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German (de)
English (en)
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EP2920839A1 (fr
Inventor
Bernd SCHÖNINGER
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Telefonaktiebolaget LM Ericsson AB
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Kathrein Austria GmbH
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Publication of EP2920839A1 publication Critical patent/EP2920839A1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/202—Coaxial filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/04—Coaxial resonators

Definitions

  • the invention relates to a high-frequency filter in coaxial design according to the preamble of claim 1.
  • a common antenna is often used for transmit and receive signals.
  • the transmit or receive signals each use different frequency ranges, and the antenna must be suitable for transmitting and receiving in both frequency ranges.
  • a suitable frequency filtering is required, with the one hand, the transmission signals from the transmitter to the antenna and on the other hand, the received signals are forwarded from the antenna to the receiver.
  • high-frequency filters are used in coaxial design.
  • Coaxial-type high-frequency filters include coaxial resonators in which resonator cavities are formed in an outer conductor housing, in which inner conductors are arranged in the form of inner conductor tubes or cylinders.
  • the inner conductor tubes each have a free end which lies adjacent to a lid which is arranged on the upper side of the housing.
  • This high-frequency coaxial resonator comprises an outer conductor housing with a axially arranged inner conductor tube.
  • the inner conductor tube ends at a distance below a lid closing the outer conductor housing.
  • the inner conductor tube is provided with a longitudinal bore passing through the inner conductor tube into which a screw can be screwed from below.
  • the screw can be screwed into a counterpart, which has a circumferential edge at a distance from the free end of the inner conductor tube, so that a bellows-shaped element can be inserted between this peripheral edge of the counterpart and the free end edge of the inner conductor tube.
  • the screw has a coefficient of thermal expansion which is less than the thermal expansion coefficient of the existing example of aluminum inner conductor tube.
  • the bellows-shaped compensation element further consists of a different material compared to the material of the screw and the inner conductor tube.
  • this embodiment also has various disadvantages, since additional elements are necessary, the bellows-shaped element has to be welded to the circumferential end wall of the inner conductor tube, etc. Intermodulation problems may also be caused thereby.
  • a Topfnik or a loaded cavity resonator with a temperature compensation is also the DE 41 13 302 C2 known. It is also a high frequency filter in coaxial design with an outer conductor and an inner conductor. Adjacent to the free end of the inner conductor, a housing cover is arranged. Above the lid, a strip-shaped bracket is arranged, which is screwed to the upper peripheral edge of the cylindrical housing of the resonator. Between the lid facing the bottom of this bracket and the top cover a block is inserted. The bracket is dimensioned in its length and in this case has a coefficient of thermal expansion, that with an increase in temperature, the longitudinal extension of the bracket is greater or greater than the extension of the underlying cover. As a result, the lid, which is curved convexly inward into the interior of the resonator, is no longer deflected so much. This reduction in deflection reduces the capacitance between the inner conductor and the lid, causing compensation.
  • a deviating compensation principle is from the US 2003/0193379 A1 to be known as known. It is also again a microwave filter in a coaxial design with a screwed in the cover screw, which can engage differently far in an axial inner recess of the inner conductor. As usual, this screw element serves to adjust the resonator frequency.
  • this prior publication describes different compensation devices that basically consist of a plate-shaped compensation disc, which is arranged for example on the inside of the lid. This disc is provided with a passage opening through which this helical adjusting element protrudes. This connected to the cover disc has a different coefficient of expansion, such that ultimately caused by a bimetallic effect caused by the lid to a deflection, whereby the distance between the end face of the inner conductor and the inside of the cover or there provided disc-shaped compensation element in the sense a temperature compensation changed.
  • a compensation device is basically also from the US 5,867,077 known. There is, however, a cavity filter without an inner resonator, so not a cavity filter in coaxial design with an inner conductor.
  • the object of the invention is in contrast to provide a high-frequency filter in a coaxial design, which is easier to manufacture and cheaper to produce than known from the prior art filter.
  • the compensation device does not consist of additional attachable, mountable or otherwise provided parts to the desired compensation effect at a temperature change to effect.
  • the invention proposes that only the existing parts of the coaxial cavity filter, that is, the housing wall surrounding the cavity (at least in part) and / or the lid (lid body) delimiting the resonator interior at least partially consists of a corresponding material in order to a temperature change and thereby caused change in length of the material used without additional equipment to realize the desired temperature compensation.
  • this is realized by a correspondingly adapted wall section which, for example, represents a part of the housing wall of the resonator or a part of the lid of the resonator, ie those parts which delimit the resonator interior space. It is therefore not additional additional externally attached to the resonator or provided there additional measures to effect a compensation, as for example the DE 41 13 302 C2 suggests.
  • corresponding wall sections that extend in the axial direction of the resonator or at least with an axial component in the direction of the resonator and not perpendicular thereto, as by using an additional plate according to the US 2003/0193379 A1 is proposed.
  • the high-frequency filter according to the invention comprises a compensation device, which in turn comprises at least one wall section extending in the axial direction, which is connected to a housing wall of the outer conductor housing and / or integrated in a housing cover.
  • the housing wall of the outer conductor housing consists of a first material having a first thermal expansion coefficient
  • the compensation device is made of a second material or comprises a second material having a second thermal expansion coefficient greater than the first thermal expansion coefficient of the first material.
  • the compensation device comprises an axially extending wall section of the second material
  • the distance of the at least one section of the housing cover changes more than a temperature change if the compensation device would not comprise a wall section of the second material extending in the axial direction. Therefore, the inner conductor, for example, made of the same material as the outer conductor housing and in particular the housing wall, so that the inner conductor in its axial length due to the increase in temperature less length than extending in the axial direction wall portion of the compensation device.
  • the outer conductor housing can in particular be formed integrally with the inner conductor, so that the production costs are reduced. Also, no expensive materials have to be used for the inner conductor, which have a low coefficient of thermal expansion. Due to the possible integral nature of the outer conductor housing and the inner conductor, intermodulation problems at any contact points of the inner conductor with the housing bottom are also eliminated.
  • the high-frequency filter according to the invention thus achieves with relatively simple means an increase in the distance between the inner conductor tube and the cover at a temperature increase, so that the falling resonance frequency of the filter due to the mechanical elongation is compensated with increasing temperature, since the distance of the free end of the inner conductor to the at least a portion of the housing cover increases disproportionately.
  • the compensation device comprises a compensation element, which comprises the extending in the axial direction wall portion and is disposed between the housing wall and the housing cover.
  • a corresponding compensation device can be realized very simply as part of the housing wall and can be arranged in any area of the housing wall.
  • a correspondingly constructed high-frequency filter is therefore particularly simple and therefore particularly cost-effective.
  • the compensation element is mechanically connected to the housing wall in the region of its free end and to the housing cover.
  • the compensation element between the free end of the housing wall and the housing cover is arranged.
  • a corresponding compensation element can be produced particularly easily and is therefore particularly cost-effective.
  • the compensation element can be arranged, for example, in the form of an intermediate layer or in the form of an intermediate ring between the housing cover and the housing wall.
  • the inner conductor is designed as an inner conductor tube with a longitudinal recess.
  • the housing cover preferably has a housing cover opening
  • the compensation device comprises a compensation ring, which comprises the wall section extending in the axial direction.
  • the compensation ring is connected to a side facing away from the inner conductor outside of the housing cover with this and forms with the housing cover opening a common passage.
  • the resonator further comprises a pin which is held by means of the compensation ring, wherein the pin protrudes through the common passage of the housing cover and the compensation ring in the longitudinal recess of the inner conductor tube.
  • a corresponding embodiment of the high-frequency filter is particularly simple and inexpensive to produce, since the compensation element simply consists of a compensation ring.
  • the pin is designed as a tuning element, which is held variable in position in its axial position by the compensation ring, so that an immersion depth of the tuning element in the longitudinal recess of the inner conductor tube is variable.
  • the compensation ring consists of metal or a metallically coated plastic.
  • the compensation device comprises a protuberance directed away from the inner conductor in the housing cover, wherein the protuberance comprises the wall section extending in the axial direction.
  • the compensation device is formed as an integral part of the housing cover and therefore particularly simple and inexpensive to manufacture.
  • the length of the wall section extending in the axial direction increases with a temperature increase, whereas the length of the wall section extending in the axial direction decreases with a decrease in temperature.
  • the distance of the free end of the inner conductor tube increases to at least a portion of the housing cover at a temperature increase, whereas the distance of the free end of the inner conductor to at least a portion of the housing cover decreases with a temperature decrease.
  • the extending in the axial direction wall portion of the protuberance extends in plan view of the resonator at a distance from the housing wall and the inner conductor.
  • the compensation device changes in a temperature change, the distance of the free end of the inner conductor to at least a portion of the housing cover both in the axial direction and in the radial direction.
  • the wall section extending in the axial direction extends at least partially around the inner conductor in the direction of the housing bottom and in plan view of the resonator.
  • the radial portion of the free end of the inner conductor changes to the at least a portion of the housing cover. Since the compensation device extends only inwardly toward the interior of the high-frequency filter, the filter may have a flat upper surface and moreover have a smaller size in the axial direction.
  • the length of the axially extending wall portion is preferably between 2% and 50%, more preferably between 5% and 35%, more preferably between 10% and 25% of the axially extending length of the housing wall.
  • FIG. 1 shows a known from the prior art high-frequency filter.
  • the high-frequency filter comprises at least one resonator 1, wherein the high-frequency filter can also comprise a plurality of resonators 1 coupled to one another.
  • Each resonator 1 comprises an inner conductor 10 and an outer conductor housing.
  • the outer conductor housing in this case comprises a housing bottom 20, a housing cover 20 spaced from the housing cover 22 and a housing wall between the housing 20 and the housing cover 22 circumferential housing wall 24.
  • Aus FIG. 1 It can be seen that the inner lining 10 is formed integrally with the housing bottom 20 and the housing wall 24.
  • the housing cover 22 rests on the free ends of the housing wall 24 and is mechanically connected by means of screws 40 with the end faces of the housing wall 24.
  • a free end 11 of the inner conductor 10, which is the end face of the inner conductor 10, has a predetermined distance to the inside of the housing cover 22.
  • the housing wall 24 is integrally formed with the housing bottom 20 and with the inner conductor 10, the housing wall 24 and the inner conductor 10 made of the same material with the same coefficient of thermal expansion. When the temperature increases, the housing wall 24 expands in proportion to its axial length. The same applies to the inner conductor 10, which also expands in proportion to its axial length. Since the axial length of the housing wall 24 is greater than the axial length of the inner conductor 10, increases with a temperature increase, the distance of the free end 11 of the inner conductor 10 to the inner wall of the housing cover 22, so that the so-called head capacity decreases, which an increase in the resonant frequency leads. As the axial length of the inner conductor 10 increases, but at the same time the resonant frequency of the filter decreases, since the mechanical length of the inner conductor 10 is inversely proportional to the frequency.
  • the corresponding lowering of the resonance frequency due to the lengthening of the axial length of the inner conductor 10 is greater than the increase in the resonance frequency associated with the temperature increase due to the decrease in the head capacitance, so that at a temperature increase or a temperature decrease, the resonance frequency of the corresponding resonator shifts.
  • corresponding resonators are complex, since the resonators must be connected to the outer conductor housing and result in intermodulation problems at the corresponding connection points.
  • FIG. 2 shows a first embodiment of the high-frequency filter according to the invention in a schematic side sectional view.
  • a compensation element 30 is arranged between the housing wall 24 and the housing cover 22.
  • the compensation element 30 is mechanically connected to the housing wall 24 in the region of the free ends thereof and to the housing cover 22 via screws 40.
  • the compensation element 30 consists of a material or comprises a material which has a higher coefficient of thermal expansion than the material from which the housing wall 24 and as the inner conductor 10.
  • the compensation element 30 can be realized, for example, in the form of an intermediate plate or a support plate, that is, in the form of an intermediate layer or an uppermost layer. Since the compensation element 30 extends in the axial direction, this comprises an axially extending wall portion 31. With a temperature increase, the compensation element 30 expands in proportion to its axial length more than the housing wall 24 and the inner conductor 10, so that the distance between the free end 11, ie the front end 11a of the inner conductor 10 to the inside of the housing cover 22 disproportionately increased.
  • the compensation element 30 in its axial thickness and by a suitable choice of material, the associated change in the resonance frequency can be formed in such a way that this change in the resonance frequency of the change in the resonance frequency due to the change in length of the inner conductor precludes and thus compensates for this change in resonance frequency ,
  • the thus constructed high-frequency filter thus has a temperature compensation and frequency stabilization.
  • the compensation device does not consist of a separate part attached somewhere or includes this, but that the compensation device according to the invention consists of a housing interior, that is, the resonator interior 50 delimiting wall portion.
  • the resonator interior 50 delimiting wall portion may also be formed at any other location, for example, the bottom 20 closer lying in any central region of the housing wall 24 or even in an immediately adjacent to the housing bottom 20 area.
  • a temperature increase causes the axial height of the coaxial resonator increases, whereby the corresponding distance between the lid inner side and the end face 11a of the inner conductor increases to effect the temperature compensation.
  • FIG. 3 shows in a schematic side sectional view of a high-frequency filter according to a second embodiment of the present invention.
  • the housing cover 22 has a protuberance 32 in this high-frequency filter or in this resonator 1.
  • the protuberance 32 is connected to the rest of the housing cover 22 via wall sections 31 extending in the axial direction.
  • the housing cover 22 is mechanically connected in a fastening area outside the protuberance 32 via screws 40 with free ends of the housing wall 24.
  • the housing cover 22 together with the protuberance 32 and the wall portions 31 are made of a material having a higher coefficient of thermal expansion than the material from which the housing wall 24 and as the inner conductor 10.
  • the length of the wall section 31 extending in the axial direction changes disproportionately to a change in length of the inner conductor 10.
  • the axial distance between the free end 11 of the inner conductor 10 to the inner wall of the protuberance 32 of the housing cover 22 increases. so that a decrease in the resonance frequency due to the extension of the axial length of the inner conductor can be compensated by a disproportionate decrease in the head capacitance of the resonator.
  • FIG. 3 It can be seen that an inner wall 33 of the protuberance 32nd flush with a housing inner wall 24 'of the housing wall 24 extends.
  • FIG. 4 shows a schematic side sectional view of a third embodiment of the high-frequency filter according to the invention.
  • the third embodiment is a combination of the first and second embodiments described above.
  • the high-frequency filter comprises a compensation element 30, which has a wall section 31 extending in the axial direction.
  • the housing cover 22 has a protuberance 32, which likewise comprises a wall section 31 extending in the axial direction.
  • Both the compensation element 30 and the housing cover 22 together with protuberance 32 and wall sections 31 are formed of materials or of a material that / has a higher coefficient of thermal expansion than the material from which the housing wall 24 and the inner conductor 10 are formed.
  • the remaining mode of operation is identical to the operation of the above-described high-frequency filters according to the first and second embodiments.
  • FIG. 5 shows in a schematic side sectional view of a high-frequency filter according to a fourth embodiment of the present invention.
  • the housing cover 22 includes a protuberance 32, which is connected by means of a wall extending in the axial direction wall portion 31 with the rest of the housing cover 22.
  • the protuberance 32 is, for example, integrally formed with the housing cover 22, that is, in one piece.
  • wall portion 31 of the protuberance 32 extends at a distance Consequently, not only only the distance extending in the axial direction between the free end 11 of the inner conductor 10 and the inner side of the protuberance 32 changes with a temperature change, but also the radial distance of the Inner conductor 10 and the free end 11 of the inner conductor 10 to the axially extending wall portion 31 of the protuberance 32.
  • This distance change in the radial direction has a change in temperature also affects the head capacity and can compensate for the displacement of the resonant frequency due to a Change in the axial length of the inner conductor 10 can be used.
  • the other structure of the high-frequency filter according to the fourth embodiment is identical to the structure of the high-frequency filter according to the second embodiment.
  • FIG. 6 shows a fifth embodiment of a high-frequency filter according to the invention in a schematic side sectional view.
  • the housing cover 22 comprises an axially extending wall portion 31, which extends in the direction of the housing bottom 20.
  • the wall section 31 is formed in a plan view of the resonator 1 at least partially circumferentially around the inner conductor 10. With a change in temperature, the radial distance of the free end 11 of the inner conductor 10 changes to extending in the axial direction wall portions 31.
  • the housing cover 22 expands in the radial direction, so that the radial distance of the wall sections 31st to the free end 11 of the inner conductor 10 increases, whereby the head capacitance of the resonator 1 decreases, which an increase in the resonant frequency of the resonator 1 result.
  • the radial distance of the wall sections 31 to the inner conductor 10 and the free end 11 of the inner conductor 10 decreases, so that the head capacitance increases, resulting in a reduction of the resonance frequency.
  • FIG. 7 shows a schematic side sectional view of a sixth embodiment of the high-frequency filter according to the invention.
  • This in FIG. 7 shown high-frequency filter is a modification of the in FIG. 2 shown high-frequency filter according to the first embodiment, in which the compensation element 30 has a greater horizontal extent, so that the compensation element 30 is connected to the housing wall 24 via corresponding screws 40, whereas the housing cover 22 is connected via further screws 41 with the compensation element 30.
  • the rest of the construction is identical to the one in FIG. 2 shown construction.
  • FIG. 8 shows in a schematic side sectional view of a high-frequency filter according to a seventh embodiment of the present invention.
  • This in FIG. 8 shown high-frequency filter is a modification of the in FIG. 3 shown high-frequency filter according to the second embodiment.
  • the wall portion 31 is not formed perpendicular, but extends obliquely away from the front ends of the housing walls 24 toward the one in the direction of the inner conductor 10 and on the other side away from the housing bottom 20.
  • the wall section 31 therefore also has a component extending in the axial direction.
  • FIG. 9 shows in a schematic side sectional view of a high-frequency filter according to an eighth embodiment of the present invention.
  • the high-frequency filter according to the eighth embodiment of the present invention is a modification of the high-frequency filters according to the second and seventh embodiments.
  • the housing cover 22 of the high-frequency filter according to the eighth embodiment has a convexly bent shape, so that the axially extending wall portion 31 extends over the entire housing cover 22.
  • the remaining functionality is identical to the high-frequency filters according to the second and seventh embodiments.
  • the housing cover 22 when explained, is formed of a material having a higher coefficient of thermal expansion (that is to say having a higher coefficient of thermal expansion than the predominant material of the housing wall 24), this also being a stronger outwardly convex bulge the cover contributes in total due to its radial length extension in the event of a temperature increase, which ultimately leads to an increase in distance between the inside of the housing cover 22 and the end face 11a of the inner conductor 11 and contributes with.
  • FIG. 10 shows in a schematic side sectional view of a high-frequency filter according to a ninth embodiment of the present invention.
  • the inner conductor 10 is configured as an inner conductor tube 10 with a longitudinal recess 12.
  • the housing cover 22 has a housing cover opening 23, and the compensation device comprises a compensation ring 34 which includes the axially extending wall portion 31.
  • the compensation ring 34 may in particular be formed from a plastic whose outside is metallized. Alternatively, the compensation ring 34 may be formed of a metallic material having a desired coefficient of expansion.
  • the compensation ring 34 is connected to the outside of the housing cover 22 with this.
  • the passage opening of the compensation ring 34 together with the housing opening 23 forms a common passage.
  • the resonator 1 comprises a pin 25 which is held by means of the compensation ring 34 in that the pin 25 rests with a support ring on the front end of the compensation ring.
  • the pin 25 projects through the common passage of the housing cover 22 and the compensation ring 34 in the longitudinal recess 12 of the inner conductor tube 10 into it. With a change in temperature, the immersion depth of the pin 25 changes in the longitudinal recess 12 of the réelleleiterohres 10th
  • FIG. 11 shows a schematic side sectional view of a high-frequency filter according to a tenth embodiment of the present invention.
  • the high-frequency filter according to the tenth embodiment differs from the high-frequency filter of the ninth embodiment in that the pin 25 is formed as a tuning element 25, which is held in its axial position variable position in the compensation ring 34, so that the immersion depth of the tuning element 25 in the longitudinal recess 12 of the inner conductor tube 10 is variable.
  • the head area of the tuning element 25 have an external thread
  • the compensation ring 34 has an internal thread, so that by turning the tuning element 25, the immersion depth of the tuning element 25 can be changed into the longitudinal recess 12.
  • the compensation ring 34 may for example be formed of a plastic, the outside of which is metallized.
  • the compensation ring 34 may be formed of a metallic material having a desired coefficient of expansion.
  • FIG. 12 shows in a schematic side sectional view of a high-frequency filter according to an eleventh embodiment of the present invention.
  • the high frequency filter according to the eleventh embodiment is a modification of the high frequency filter according to the fourth embodiment.
  • the housing cover 22 has a circumferential around the inner conductor 10 groove, which compensates for mechanical deformation of the housing cover due to temperature changes.
  • the outside of the housing cover thus has a circumferential groove.
  • FIG. 13 shows a schematic side sectional view of a high-frequency filter according to a twelfth embodiment of the present invention.
  • the high frequency filter shown is characterized in that the inner conductor 10 is formed as an inner conductor tube 10 with a longitudinal recess 12.
  • the housing cover 22 includes a pin 25 connected thereto, which projects into the longitudinal recess 12 of the inner conductor tube. Furthermore, the housing cover 22 has the wall section 31 extending in the axial direction, such that upon a change in temperature, the penetration depth of the wall Pin 25 is variable in the longitudinal recess 12 of the inner conductor tube 10.
  • the outer conductor housing may be formed of, for example, aluminum, brass, invar steel, cast aluminum or metallized plastic.
  • the housing cover 22 may be formed, for example, of aluminum or of metallised acrylonitrile-butadiene-styrene (ABS plastic).
  • the inner conductor may be formed of the same materials as the outer conductor housing and may also be formed of iron, steel or brass.

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Claims (17)

  1. Filtre haute fréquence de construction coaxiale, le filtre haute fréquence présentant les caractéristiques suivantes :
    - le filtre haute fréquence comprend au moins un résonateur (1) avec un conducteur interne (10) et un boîtier de conducteur externe ;
    - le boîtier de conducteur externe comprend un fond de boîtier (20), un couvercle de boîtier (22) espacé par rapport au fond de boîtier (20) et une paroi de boîtier (24) circonférentielle entre le fond de boîtier (20) et le couvercle de boîtier (22) qui est constituée d'un premier matériau, qui présente un premier coefficient de dilatation thermique ;
    - le conducteur interne (10) est relié de manière galvanique avec le fond de boitier (20) et s'étend en direction axiale du fond de boitier (20) en direction du couvercle de boitier (22) ;
    - le conducteur interne (10) se termine à distance avant le couvercle de boîtier (22) et/ou est séparé de manière galvanique du couvercle de boîtier (22) ;
    - le filtre haute fréquence comprend un dispositif de compensation (30, 31, 34) à base d'un deuxième matériau qui présente un deuxième coefficient de dilatation thermique,
    - le deuxième coefficient de dilatation thermique su deuxième matériau est supérieur au premier coefficient de dilatation thermique du premier matériau ; et
    - lors d'une augmentation de la température, une distance entre une extrémité libre (11) du conducteur interne (10) et au moins un segment du couvercle de boitier (22) s'agrandit, et lors d'une diminution de la température, la distance entre l'extrémité libre (11) du conducteur interne (10) et l'au moins un segment du couvercle de boitier (22) diminue ;
    - le dispositif de compensation (30, 31, 34) est conçu pour provoquer un étirement en longueur dépendant de la température à partir d'un segment de paroi délimitant l'espace intérieur de résonateur (50) et/ou à partir d'une partie du couvercle de boitier (22) délimitant l'espace intérieur de résonateur (50), à cette fin, la paroi de boitier entourant l'espace intérieur de résonateur est constituée au moins sur une hauteur partielle, et/ou le couvercle délimitant l'espace intérieur de résonateur au moins partiellement, du deuxième matériau avec le coefficient de dilatation thermique supérieur par rapport au premier matériau,
    - le dispositif de compensation (30, 31, 34) est constitué
    a) d'un segment de paroi (31) s'étendant dans la direction axiale et variant dans sa longueur dans cette direction lors d'une variation de la température, qui est une partie de la paroi de boitier (24) et qui est conçu d'après une espèce de couche intermédiaire ou une couche supérieure se situant au voisinage du couvercle de boitier (22)
    et/ou
    b) d'un segment de paroi (31) s'étendant en direction axiale ou dans une direction qui s'étend inclinée par rapport à celle-ci et variant dans sa longueur dans cette direction lors d'une variation de la température, qui est une partie intégrale du couvercle de boitier (22), ou est constitué d'un couvercle de boitier (22) avec une courbure convexe orientée vers l'extérieur, où le dispositif de compensation (30, 31, 34) comprend une excroissance (32) dans le couvercle de boitier (22) orientée s'éloignant du conducteur interne (10), où l'excroissance (32) comprend le segment de paroi (31) s'étendant en direction axiale,
    et/ou
    c) du couvercle de boitier (22) avec au moins un segment de paroi (31) conçu s'étendant au moins partiellement autour du conducteur interne (10) dans une vue plongeante sur le résonateur (1) et dépassant dans l'espace interne de résonateur (50), dont la distance radiale jusqu'à l'extrémité libre (11) du conducteur interne (10) se modifie en fonction d'une variation de température.
  2. Filtre haute fréquence selon la revendication 1, caractérisé en ce que le dispositif de compensation (30, 31, 34) comprend un élément de compensation (30) qui comprend le segment de paroi (31) s'étendant en direction axiale et est disposé entre la paroi de boitier (24) et le couvercle de boitier (22).
  3. Filtre haute fréquence selon la revendication 2, caractérisé en ce que l'élément de compensation (30) est relié mécaniquement avec la paroi de boitier (24) dans la région de l'extrémité libre de la paroi de boitier (24) et avec le couvercle de boitier (22).
  4. Filtre haute fréquence selon la revendication 2 ou la revendication 3, caractérisé en ce que l'élément de compensation (30) exerce une force sur le couvercle de boitier (22) lors d'une augmentation de température orientée essentiellement s'éloignant de l'extrémité libre du conducteur interne (10) et orientée essentiellement vers l'extrémité libre du conducteur interne (10) lors d'une diminution de la température.
  5. Filtre haute fréquence selon l'une des revendications précédentes, caractérisé en ce que le conducteur interne (10) est conçu sous forme d'un tube conducteur intérieur (10) avec une cavité longitudinale (12).
  6. Filtre haute fréquence selon la revendication 5, caractérisé par les caractéristiques suivantes :
    - le couvercle de boitier (22) présente un orifice de couvercle de boitier (23) ;
    - le dispositif de compensation (30, 31, 34) comprend un anneau de compensation (34) qui comprend le segment de paroi (31) s'étendant en direction axiale ;
    - l'anneau de compensation (34) est sur un côté extérieur du couvercle de boitier (22), relié avec celui-ci, à l'opposé du conducteur interne (10) et forme un passage commun avec l'orifice de couvercle de boitier (23) ;
    - le résonateur (1) comprend un stylet (25) qui est maintenu au moyen de l'anneau de compensation (34) ; et
    - le stylet dépasse du passage commun du couvercle de boitier (22) et de l'anneau de compensation (34) dans la cavité longitudinale (12) du tube de conducteur interne (10), ce par quoi la distance entre l'extrémité libre (11) du conducteur interne (10) et l'au moins un segment du couvercle de boitier (22) peut être modifiée en fonction de la température sous la forme du stylet (25) en saillie.
  7. Filtre haute fréquence selon la revendication 6, caractérisé en ce que le stylet (25) est conçu sous forme d'élément d'évaluation (25) qui est maintenu variable au niveau de l'emplacement dans sa position axiale par l'anneau de compensation (34), de sorte qu'une profondeur d'immersion de l'élément d'évaluation (25) dans la cavité longitudinale (12) du tube de conducteur interne (10) est variable.
  8. Filtre haute fréquence selon la revendication 7, caractérisé en ce que le couvercle de boitier (22) comprend un stylet (25) qui lui est relié, qui dépasse dans la cavité longitudinale (12) du tube de conducteur interne (10).
  9. Filtre haute fréquence selon l'une des revendications 1 à 8, caractérisé en ce que le dispositif de compensation (30, 31, 34) comprend une excroissance (32) dans le couvercle de boitier (22), où l'excroissance (32) comprend le segment de paroi (31) s'étendant en direction axiale s'éloignant du conducteur interne (10), et qu'une paroi intérieure (33) de l'excroissance (32) s'étend en affleurement avec une paroi interne de boitier (24').
  10. Filtre haute fréquence selon l'une des revendications 1 à 8, caractérisé en ce que le dispositif de compensation (30, 31, 34) comprend une excroissance (32) dans le couvercle de boitier (22) orientée s'éloignant du conducteur interne (10), où l'excroissance (32) comprend le segment de paroi (31) s'étendant en direction axiale, et que le segment de paroi (31) de l'excroissance (32) s'étendant en direction axiale s'étend, dans une vue plongeante sur le résonateur (1), à l'écart de la paroi de boitier (24) et du conducteur interne (10).
  11. Filtre haute fréquence selon l'une des revendications précédentes, caractérisé en ce que le segment de paroi (31) pénétrant dans l'espace intérieur de résonateur (50) s'étend en direction axiale, et que le segment de paroi (31) est prévu ou est formé sur le côté du couvercle de boitier (22) orienté vers l'espace intérieur de résonateur (50) et s'étend en direction du fond de boitier (20) au moins sur une hauteur partielle du conducteur interne (10) de telle manière que, dans une vue plongeante axiale sur le filtre de haute fréquence, le conducteur interne (10) se trouve à l'intérieur du segment de paroi (31) avec sa forme en section transversale.
  12. Filtre haute fréquence selon l'une des revendications précédentes, caractérisé en ce que le premier matériau comprend de l'aluminium, et/ou du laiton, et/ou de l'Invar, et/ou une matière plastique renforcée de fibres de verre, et le deuxième matériau comprend de l'aluminium, et/ou de l'acrylonitrile-butadiène-styrène.
  13. Filtre haute fréquence selon l'une des revendications précédentes, caractérisé en ce que le deuxième coefficient de dilatation thermique est supérieur d'au moins 50 %, de préférence, d'au moins 100 %, de manière particulièrement préférée d'au moins 150 % au premier coefficient de dilatation thermique.
  14. Filtre haute fréquence selon l'une des revendications précédentes, caractérisé en ce que le couvercle de boîtier (22) est en matière plastique qui est revêtue de métal au moins sur le côté orienté vers le fond de boitier (20).
  15. Filtre haute fréquence selon l'une des revendications précédentes, caractérisé en ce que le boitier de conducteur externe est conçu en faisant une seule pièce avec le tube de conducteur interne (2), notamment sous forme d'une pièce fraisée, ou moulée, ou d'une pièce plastique moulée par injection.
  16. Filtre haute fréquence selon l'une des revendications précédentes, caractérisé en ce que le filtre haute fréquence comprend au moins deux résonateurs qui sont conçus de telle manière et couplés qu'un filtre séparateur bipolaire est formé.
  17. Filtre haute fréquence selon l'une des revendications 1 à 15, caractérisé en ce que le filtre de haute fréquence comprend au moins deux résonateurs qui sont conçus de telle manière qu'un filtre passe-bande, ou un filtre coupe-bande, est formé.
EP13792595.4A 2012-11-15 2013-11-14 Filtre haute fréquence avec stabilisation de fréquence Active EP2920839B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012022411.7A DE102012022411A1 (de) 2012-11-15 2012-11-15 Hochfrequenzfilter mit Frequenzstabilisierung
PCT/EP2013/003434 WO2014075801A1 (fr) 2012-11-15 2013-11-14 Filtre haute fréquence à stabilisation en fréquence

Publications (2)

Publication Number Publication Date
EP2920839A1 EP2920839A1 (fr) 2015-09-23
EP2920839B1 true EP2920839B1 (fr) 2019-09-11

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EP13792595.4A Active EP2920839B1 (fr) 2012-11-15 2013-11-14 Filtre haute fréquence avec stabilisation de fréquence

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US (1) US9673497B2 (fr)
EP (1) EP2920839B1 (fr)
DE (1) DE102012022411A1 (fr)
WO (1) WO2014075801A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2928011B1 (fr) * 2014-04-02 2020-02-12 Andrew Wireless Systems GmbH Résonateur à cavité micro-ondes
WO2018129719A1 (fr) 2017-01-13 2018-07-19 华为技术有限公司 Résonateur à cavité, filtre et dispositif de télécommunication
CN113315481B (zh) * 2021-04-28 2024-08-09 珠海市康定电子股份有限公司 一种低抖动滤波器

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US2486129A (en) * 1949-10-25 Temperature compensating
US3955161A (en) * 1974-08-05 1976-05-04 General Dynamics Corporation Molded waveguide filter with integral tuning posts
FR2507018A1 (fr) * 1981-06-02 1982-12-03 Thomson Csf Resonateur hyperfrequence du type condensateur variable a dielectrique
GB2129228B (en) * 1982-10-01 1986-06-18 Murata Manufacturing Co Dielectric resonator
DE4113302C2 (de) * 1991-04-24 1999-10-14 Bosch Gmbh Robert Topfkreis oder belasteter Hohlraumresonator mit Temperaturkompensation
FI89644C (fi) * 1991-10-31 1993-10-25 Lk Products Oy Temperaturkompenserad resonator
US5329687A (en) * 1992-10-30 1994-07-19 Teledyne Industries, Inc. Method of forming a filter with integrally formed resonators
CA2187829C (fr) * 1996-10-15 1998-10-06 Steven Barton Lundquist Filtre hyperfrequence a correction des effets dus a la temperature
US5905419A (en) * 1997-06-18 1999-05-18 Adc Solitra, Inc. Temperature compensation structure for resonator cavity
US6407651B1 (en) 1999-12-06 2002-06-18 Kathrein, Inc., Scala Division Temperature compensated tunable resonant cavity
EP1312132A1 (fr) * 2000-08-22 2003-05-21 Paratek Microwave, Inc. Filtre en peigne a condensateurs dielectriques accordables
US6734766B2 (en) * 2002-04-16 2004-05-11 Com Dev Ltd. Microwave filter having a temperature compensating element
KR100810971B1 (ko) * 2007-03-12 2008-03-10 주식회사 에이스테크놀로지 알에프 장비 제조 방법 및 그 방법에 의해 제조된 알에프장비
US8633789B2 (en) * 2008-05-21 2014-01-21 Telefonaktiebolaget L M Ericsson (Publ) Force arrangement for radio frequency filters
CN201222530Y (zh) * 2008-06-30 2009-04-15 摩比天线技术（深圳）有限公司 同轴腔体谐振器及同轴腔体滤波器
IT1391340B1 (it) * 2008-10-03 2011-12-05 Torino Politecnico Risonatore cilindrico a microonde.
DE102009025408B4 (de) * 2009-06-18 2011-09-01 Kathrein-Austria Ges.M.B.H. Hohlraumfilter
EP2403053B1 (fr) * 2010-06-29 2014-11-12 Alcatel Lucent Mécanisme de couplage pour cavité résonante rentrante à micro-ondes montée sur carte à circuit imprimé
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Publication number Publication date
DE102012022411A1 (de) 2014-05-15
WO2014075801A1 (fr) 2014-05-22
US9673497B2 (en) 2017-06-06
EP2920839A1 (fr) 2015-09-23
US20150288044A1 (en) 2015-10-08

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