WO2014063829A1 - Abstimmbares hochfrequenzfilter - Google Patents
Abstimmbares hochfrequenzfilter Download PDFInfo
- Publication number
- WO2014063829A1 WO2014063829A1 PCT/EP2013/003226 EP2013003226W WO2014063829A1 WO 2014063829 A1 WO2014063829 A1 WO 2014063829A1 EP 2013003226 W EP2013003226 W EP 2013003226W WO 2014063829 A1 WO2014063829 A1 WO 2014063829A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inner conductor
- housing
- frequency filter
- housing cover
- tuning element
- Prior art date
Links
Classifications
-
- 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
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. 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
-
- 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 frequently used for transmit and receive signals.
- the transmit and 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 reception signals are forwarded from the antenna to the receiver.
- high-frequency filters are used in coaxial design. Two interconnected high-frequency filters form a so-called duplex switch, which allows a largely decoupled interconnection of transmitters and receivers to a common antenna.
- a pair of high-frequency filters can be used, both of which allow a certain frequency band (bandpass filter).
- a pair of high frequency filters may be used, both of which block a particular frequency band (bandstop filter).
- a pair of high frequency filters may be used, of which one filter passes frequencies below a frequency between transmit and receive bands and blocks frequencies above that frequency (low pass filter), and the other filter blocks frequencies below a frequency between transmit and receive bands and pass through higher frequencies (high-pass filter).
- Other combinations of the just mentioned filter types are conceivable.
- High-frequency filters are often constructed from coaxial resonators, since they consist of milling or casting parts, whereby they are easy to produce. In addition, these resonators ensure a high electrical quality and a relatively high temperature stability.
- a generic temperature-compensated coaxial resonator has become known from WO 2006/058965 AI. It comprises according to an embodiment in addition to a coaxial housing with a corresponding inner conductor, which ends at a distance below a lid, an embodiment for adjusting the resonant frequency. As usual, a screw is used which can be turned in and out in different ways in the lid.
- the actuator is axially aligned with the inner conductor and has its inner conductor facing the front end, a dielectric compensation element, which is configured disk-shaped, on. An arrangement comparable to this extent has also become known from JP 62123801 A.
- EP 2 044 648 Bl describes an example of a coaxial high-frequency filter.
- This filter comprises a resonator with an inner conductor and an outer conductor, wherein a tuning element is provided in a housing cover of the resonator, which has an external thread.
- a threaded receptacle is provided with a thread.
- the thread pitch of the external thread of the tuning element differs from the thread pitch of the internal thread of the threaded receptacle in at least a portion of the internal thread and the external thread, whereby an automatic self-locking of the Abstimmelements is realized.
- the high frequency filter disclosed in this document comprises a coaxial resonator consisting of an electrically conductive outer conductor and an electrically conductive inner conductor.
- the outer conductor and the inner conductor are connected to one another via an electrically conductive base plate.
- the coaxial resonator is terminated by an electrically conductive cover.
- the frequency tuning is done by a grub screw whose immersion depth in the inner conductor is frequency-determining. If the frequency has been set precisely, the balancing threaded pin is fixed with a counter nut.
- a disadvantage of this type of coaxial resonator is the critical contact transition from the threaded pin to the lid. Due to metal abrasion and undefined contact points between the threaded pin and the threaded hole, intermodulation products may form.
- the high-frequency filters described above have the common feature that the tuning elements, which are held in the housing cover variable in position, made of metal.
- the position change of the tuning elements is achieved in that the tuning elements have an external thread, which is screwed into an internal thread of the housing cover. Consequently, the threads are located in the high-frequency-critical resonator interior, which inevitably causes intermodulation problems.
- aluminum resonator housing for receiving the corresponding tuning element press-fit thread since aluminum is too soft for fine threads, so that the thread of the adjustment can seize.
- the tuning elements in the coaxial high-frequency filters described above are arranged at high-frequency critical points, so that currents also flow over the contact region of the external thread of the tuning element and the internal thread of the resonator housing.
- this problem is addressed by strained threads.
- a corresponding coaxial RF filter is expensive to manufacture and therefore expensive.
- high-frequency filters known from the prior art have insufficient frequency stabilization with a temperature change.
- temperature fluctuations occur, there is a change in the mechanical length of the inner conductor tube. Since the mechanical length is inversely proportional to the frequency, the resonant frequency of the filter decreases as the mechanical length increases with increasing temperature. For example, this effect can cause a change in the resonant frequency of 5.7 MHz for a filter with a resonant frequency of 2.4 GHz at a temperature difference of 120 ° C.
- 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 lower than the coefficient of thermal expansion of the inner conductor tube, which is made of aluminum, for example.
- 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, since the bellows-shaped element must be welded to the circumferential end wall of the inner conductor tube, etc. Intermodulation problems can also be caused thereby.
- the tuning element comprises a dielectric material and / or is formed from a dielectric material.
- the housing bottom in the high-frequency filter according to the invention has no adjustment opening, which eliminates additional sealing measures such as sealing films, sealing adhesives or environmental cover in outdoor applications.
- the thermal expansion of the tuning element consisting of a dielectric material or such a comprehensive tuning element in the high-frequency filter has a temperature-compensating effect, ie temperature-induced frequency changes can be significantly minimized.
- a suitably designed tuning element is particularly inexpensive to produce, since due to the choice of material the Abstimmelernent can be made very inexpensively, for example by injection molding.
- the tuning element can have an external thread, and an internal thread can be arranged in the housing cover, so that a position change or a change in position of the tuning element can be effected simply by rotating the tuning element. Even with a corresponding embodiment, no intermodulation problems occur.
- the housing cover comprises a socket electrically connected thereto, which extends in the direction of the housing bottom. The tuning element is held variable in position in the bush in its axial position.
- the socket can be connected to the housing cover cohesively. This can be achieved, for example, by producing the housing cover from a cast part, wherein the socket is an integral part of the cast cover. Alternatively, however, the socket can also be a separate component which is connected to the housing cover. A corresponding connection can be realized, for example, by pressing the socket into the housing cover or by soldering or welding the socket to the housing cover.
- the bushing is formed as a threaded bushing with an internal thread
- the tuning element has an external thread, which is in engagement with the internal thread of the threaded bushing.
- the axial position change of the tuning element is particularly simple and very accurate.
- the inner conductor has a longitudinal recess, which extends from the housing cover opposite the front end of the inner conductor in the direction of the housing bottom, wherein the AbStimmelement is insertable into the longitudinal recess of the inner conductor.
- the bush ends at the level of the front end of the inner conductor or immersed in the longitudinal recess of the inner conductor, wherein the tuning element protrudes from the housing bottom opposite the front end of the socket.
- a corresponding embodiment of the high-frequency filter allows a particularly effective adjustment of the resonant frequency of the high-frequency filter.
- the tuning element has a central portion, by means of which the tuning element is held variable in position. On this central portion then preferably an external thread is applied.
- the tuning element preferably has a circumferential wall which is separated from the central section by a recess running around the central section, so that a clearance space is formed between the central section and the circumferential wall.
- the central section is connected to the peripheral wall via a tuning element floor.
- the tuning element is thus bell-shaped and is inversely T-shaped in cross section.
- the resonant frequency of the resonator is particularly effective adjustable.
- the correspondingly formed high-frequency filter has particularly good temperature compensation properties.
- a suitably designed high-frequency filter ensures an effective saraen surge arrester. Because the distance between the inner conductor tube in the region of the end face and the housing bottom facing the front end of the socket is particularly small, so that in this area the maximum electric field strength occurs at the so-called open end of the inner conductor. At this point there is an increased risk of overturning at higher transmission powers due to resonance effects.
- the peripheral wall of the tuning element is arranged between the inner conductor tube and the threaded bush, so that the balancing element or the tuning element reliably protects against flashovers due to its insulating effect.
- the tuning element further comprises a circumferential around the tuning collar, which is connected to the housing cover opposite the front end of the Umlaufwandung and extends radially directed away from the central portion.
- An appropriately designed high-frequency filter has a further increased flashover protection at the open end of the inner conductor, since the collar spans the frontal end of the inner conductor, so that a flashover between the inner conductor and the inner housing cover side is reliably prevented.
- the peripheral wall of the tuning element has a peripheral edge, so that the peripheral wall above the peripheral edge, i. directed towards the housing cover has a smaller wall thickness than below the peripheral edge, i. directed towards the case back.
- a correspondingly designed high-frequency filter has again improved
- the housing wall and the inner conductor of a first material having a first coefficient of thermal expansion or the housing wall consists of a first coefficient of thermal expansion exhibiting first material and the inner conductor consists of a second coefficient of thermal expansion having second material.
- the tuning element consists of a third material having a third coefficient of thermal expansion. The third thermal expansion coefficient of the third material is greater than the first thermal expansion coefficient of the first material and / or greater than the second thermal expansion coefficient of the second material.
- the tuning element expands more strongly in the axial direction of the tuning element than the inner conductor and the housing wall, so that a greater proportion of the circumferential wall is arranged above the peripheral edge between the inner conductor and the socket, whereby less dielectric material is interposed between the inner wall
- Inner conductor and the socket is located, which reduces the head capacity of the resonator.
- the tuning element contracts more in the axial direction than the inner conductor and the housing wall, so that a smaller portion of the peripheral wall is located above the peripheral edge between the inner conductor and the socket, resulting in more dielectric material between the inner conductor and the socket which increases the head capacitance of the resonator.
- the reduction of the head capacity with a temperature increase in the corresponding amplified so that due to the reduction of the head capacitance, the concomitant increase in the resonant frequency stronger, resulting in a stronger temperature compensation result, because with a temperature increase parallel decreases the resonant frequency due to mechanical extension of the inner conductor tube.
- the height of the sleeve provided on the housing cover with the internal thread in relation to the diameter of the socket to a degree which is greater than or equal to 1.5.
- FIG. 1 shows a schematic axial cross section through a high-frequency filter according to the invention in accordance with a first embodiment of the present invention
- FIG. 2 shows a schematic axial cross section through the high-frequency filter according to the invention according to a second embodiment of the present invention.
- FIG. 1 shows a high-frequency filter according to the invention which comprises a resonator 1.
- 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 which in turn comprises a housing bottom 20, a housing cover 22 spaced away from the housing bottom 20 and a housing wall 24 encircling the housing bottom 20 and the housing cover 22. From Figure 1 it can be seen that the inner conductor 10 with the housing bottom 20 and the housing wall 24 is integrally formed.
- the housing cover 22 rests on the free ends of the housing wall 24 and may be mechanically connected, for example, by means of screws, not shown, with the end faces of the housing wall. However, it is also possible that the housing cover 22 is integrally formed with the housing wall.
- 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. It can be seen from FIG. 1 that the inner conductor 10 has a longitudinal recess 12 which extends from the end face of the inner conductor 10 opposite the housing cover 22 in the direction of the housing bottom 20.
- the inner conductors 10 are formed as inner conductor tubes 10 and as inner conductor cylinders 10, respectively.
- the high-frequency filter further comprises a sleeve 40 which is formed in the illustrated embodiments as a threaded bushing 40 with an internal thread 41.
- the threaded bushing 40 is galvanically connected to the housing cover 22.
- the threaded bushing 40 may consequently consist of a metal or may consist of a dielectric material which is coated with a metal layer.
- the bush 40 may also be integrally formed with the housing cover 22, so that the bushing 40 is integrally connected to the housing cover 22.
- the threaded bushing 40 is connected to the Gephaseusede- disgust 22, for example by a press-fit.
- the threaded bushing 40 may be galvanically connected to the housing cover 22 via a soldering or welding.
- the threaded bushing 40 dips into the longitudinal recess 12 of the inner conductor 10.
- the threaded bush 40 ends at the level of the front end 11 of the inner conductor 10.
- the threaded bush 40 ends above the front end 11 of the inner conductor 10.
- the threaded bushing 40 shown in FIGS. 1 and 2 also extends outside the resonator interior, so that the housing wall of the threaded bushing 40 extends outward beyond the housing cover 22.
- the high frequency filter according to the invention further comprises a Abstimmelernent 30, which is held in its axial position variable in the socket 40.
- the tuning element 30 has an external thread 32 on a central portion 31.
- the external thread 32 is engaged with the internal thread 41 of the threaded bushing 40, so that its axial position can be changed by rotation of the tuning element 30.
- the tuning element 30 further comprises a circumferential wall 33, which is separated from the central section 31 by a recess 35 running around the central section 31. Thus, a distance space 35 is formed between the central portion 31 and the Umlaufwandung 33.
- the central portion 31 is connected to the Umlaufwandung 33 via a Abstimmelementboden 36.
- the housing bottom 20 opposite the front end of the threaded bushing 40 is in the distance space 35 between see the central portion 31 and the peripheral wall 33 of the Abstimmelements 30 added.
- the Umlaufwandung 33 between the sleeve 40 and the wall of the inner conductor tube 10 is arranged.
- the Abstimmerivent 30 preferably consists of a plastic so from a Dielek- trikum.
- the tuning element 30 is formed of a dielectric material or of a dielectric, such as for example a plastic, no intermodulation problems occur at the contact point of the external thread 32 with the internal thread 41. By turning the Abstimmelements 30 in the threaded bushing 40 no metal abrasion, which could lead to an intermodulation problem.
- the tuning element 30 may consist, for example, of a dielectric material such as plastic, that is, including the external thread 32, there can be no current transition to the socket which is made of an electrically conductive material with the associated internal thread 41.
- the tuning element 30 in itsußman- tel Scheme consists of a dielectric material, so that the entire threads are formed of a dielectric material, so that here no current transfer with the metal or a can take place with a metallic layer coated internal thread of the sleeve 40.
- the tuning element 30 may consist wholly or partly of a dielectric material so far, but also the threaded bushing.
- each made of dielectric material also leads to the fact that no current transitions can take place in the region of the threaded threaded engagement.
- the circumferential wall 33 which is arranged between the inner conductor 10 and the threaded bushing 40, is an overvoltage protection of the resonator 1.
- the maximum field strength occurs at the open end 11 of the inner conductor 10.
- the risk of overturning increases from the inner conductor 10 towards the threaded bushing 40. This risk of overturning is considerably reduced by the circumferential wall 33 of the tuning element 30.
- the circumferential wall 33 of the tuning element 30 has a so-called peripheral edge 34.
- the wall thickness of the peripheral wall 33 is smaller than the wall thickness of the peripheral wall below the peripheral edge 34 above the peripheral edge 34.
- the edge 34 faces the threaded bushing 40. However, it is also possible that this edge 34 is facing the inner wall of the inner conductor 10.
- FIG. 2 shows a high-frequency filter according to the second embodiment of the present invention.
- the structure of the high frequency filter shown in Figure 2 is identical to the high frequency filter shown in Figure 1, with the only difference that the tuning element 30 further comprises a circumferential collar 37, which with the housing cover 22 opposite front end of the Umlaufwandung 33 is connected and extends radially directed away from the central portion 31.
- This collar 37 has a further reduction of the risk of rollover result.
- the collar 37 is positioned above the free end 11 of the inner conductor 10, so that the collar 37 is arranged between the free end 11 and the inner wall of the housing cover 22.
- a flashover between the inner conductor 10 and the housing cover 22 is also reliably prevented.
- the housing bottom 20, the housing wall 24 and the inner conductor 10 are usually made of a metal, i. of a first material having a first thermal expansion coefficient. It is also possible that the housing wall 24 consists of a first material exhibiting a first thermal expansion coefficient and the inner conductor 10 consists of a second material exhibiting a second thermal expansion coefficient.
- the tuning element may be made of a plastic, i. consist of a third material having a third coefficient of thermal expansion. The third thermal expansion coefficient of the plastic is greater than the first thermal expansion coefficient of the first material and / or greater than the second thermal expansion coefficient of the second material.
- the tuning element contracts in the axial direction more than the inner conductor 10 and the housing wall 24, whereby a smaller proportion of the Umlaufwandung above the peripheral edge between the inner conductor 10 and the sleeve 40 is located, which in turn has the consequence that more dielectric material is located between the inner conductor 10 and the socket 40. This increases the head capacity of the resonator.
- the outer conductor housing may be formed of, for example, aluminum, brass, invar steel, cast aluminum or Arnite plastic with glass fiber. From selbigen materials and the housing cover 22 may be formed.
- the housing with the inner conductor, the housing bottom and the housing cover may be made of a dielectric material, which is coated with an electrically conductive layer.
- the electrically conductive layer is attached to the lid on the inside, so that at the junction between the housing cover and peripheral housing walls of the outer conductor housing a full-surface galvanic contact is ensured.
- This electrically conductive layer can also be provided in the region of the bushing 40 and thereby cover the internal thread 41 of the threaded bush 40, so that the internal thread is in turn electrically conductive on its surface.
- the tuning element can be formed, for example, from acrylonitrile-butadiene-styrene (ABS plastic).
- the inner conductor may be formed of the same materials as the outer conductor housing. In the exemplary embodiment shown, it is shown that the threaded bushing 40 may optionally be attached to the housing cover at different heights.
- the height H, ie the axial length H of the threaded bushing 40 in relation to the inner diameter D of the threaded bush 40 has a dimension which is 1.5, preferably 1.6, 1.7, 1 , 8, 1.9, 2.0 or even 2.25, 2.5, 2.75, 3.0 and / or more. In general, however, it is sufficient if these values are not greater than 2.0 or 2.5 or even 3.0. In all cases, it is ensured that the overall housing is optimally shielded to the outside and no electromagnetic radiation can escape or enter.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020157013873A KR101720261B1 (ko) | 2012-10-25 | 2013-10-24 | 튜닝 가능한 고주파 필터 |
EP13782980.0A EP2912714B1 (de) | 2012-10-25 | 2013-10-24 | Abstimmbares hochfrequenzfilter |
US14/438,725 US9748622B2 (en) | 2012-10-25 | 2013-10-24 | Tunable high frequency filter |
CA2886911A CA2886911A1 (en) | 2012-10-25 | 2013-10-24 | Tunable high-frequency filter |
CN201380062046.XA CN104838537B (zh) | 2012-10-25 | 2013-10-24 | 可调谐的高频滤波器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012020979.7 | 2012-10-25 | ||
DE102012020979.7A DE102012020979A1 (de) | 2012-10-25 | 2012-10-25 | Abstimmbares Hochfrequenzfilter |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014063829A1 true WO2014063829A1 (de) | 2014-05-01 |
Family
ID=49486445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2013/003226 WO2014063829A1 (de) | 2012-10-25 | 2013-10-24 | Abstimmbares hochfrequenzfilter |
Country Status (7)
Country | Link |
---|---|
US (1) | US9748622B2 (de) |
EP (1) | EP2912714B1 (de) |
KR (1) | KR101720261B1 (de) |
CN (1) | CN104838537B (de) |
CA (1) | CA2886911A1 (de) |
DE (1) | DE102012020979A1 (de) |
WO (1) | WO2014063829A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017005926A1 (de) | 2015-07-09 | 2017-01-12 | Kathrein-Werke Kg | Gewindelose abstimmelemente für koaxialresonatoren und verfahren zur abstimmung derselben |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9490766B2 (en) * | 2014-02-13 | 2016-11-08 | Ut-Battelle, Llc | Shielded multi-stage EMI noise filter |
KR101693214B1 (ko) * | 2014-10-28 | 2017-01-05 | 주식회사 케이엠더블유 | 캐비티 구조를 가진 무선 주파수 필터 |
US10050323B2 (en) * | 2015-11-13 | 2018-08-14 | Commscope Italy S.R.L. | Filter assemblies, tuning elements and method of tuning a filter |
TWI614545B (zh) * | 2016-04-12 | 2018-02-11 | 鏡元科技股份有限公司 | 大光圈太赫茲-吉赫茲鏡片系統 |
WO2019127496A1 (zh) * | 2017-12-29 | 2019-07-04 | 华为技术有限公司 | 一种腔体滤波器 |
US11139545B2 (en) * | 2019-07-31 | 2021-10-05 | Nokia Shanghai Bell Co., Ltd. | Dielectric tuning element |
CN111211395B (zh) * | 2020-01-20 | 2022-05-17 | 江苏宝利金材科技有限公司 | 一种高分子复合材料腔体滤波器的制备方法 |
CN113131117B (zh) * | 2021-04-16 | 2022-04-15 | 西安电子科技大学 | 一种应用于腔体滤波器的温度补偿螺钉 |
EP4239786A1 (de) * | 2022-03-03 | 2023-09-06 | Nokia Solutions and Networks Oy | Frequenzanpassbarer filter |
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EP0068919A1 (de) * | 1981-06-02 | 1983-01-05 | Thomson-Csf | Mikrowellenresonator vom Typ eines mit Dielektrikum versehenen veränderbaren Kondensators |
WO2000064001A1 (de) * | 1999-04-15 | 2000-10-26 | Kathrein-Werke Kg | Hochfrequenzfilter |
WO2006058965A1 (en) * | 2004-11-30 | 2006-06-08 | Filtronic Comtek Oy | Temperature-compensated resonator |
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FR2477783A1 (fr) | 1980-03-04 | 1981-09-11 | Thomson Csf | Dispositif d'accord a capacite variable et filtre hyperfrequences accordable comportant au moins un tel dispositif |
JPS62123801A (ja) * | 1985-11-25 | 1987-06-05 | Matsushita Electric Ind Co Ltd | 同軸型フイルタ |
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 |
US6407651B1 (en) | 1999-12-06 | 2002-06-18 | Kathrein, Inc., Scala Division | Temperature compensated tunable resonant cavity |
SE516862C2 (sv) | 2000-07-14 | 2002-03-12 | Allgon Ab | Avstämningsskruvanordning samt metod och resonator |
US7224248B2 (en) | 2004-06-25 | 2007-05-29 | D Ostilio James P | Ceramic loaded temperature compensating tunable cavity filter |
DE102006033704B3 (de) | 2006-07-20 | 2008-01-03 | Kathrein-Werke Kg | Hochfrequenzfilter in koaxialer Bauweise, insbesondere nach Art einer Hochfrequenzweiche (z.B. einer Duplex-Weiche) oder eines Bandpassfilters oder Bandsperrfilters |
KR100959073B1 (ko) * | 2008-01-22 | 2010-05-20 | 주식회사 이롬테크 | 고주파 필터 및 이의 튜닝 구조 |
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CN201985225U (zh) * | 2010-12-20 | 2011-09-21 | 深圳市国人射频通信有限公司 | 一种介质滤波器 |
CN102354780A (zh) | 2011-07-22 | 2012-02-15 | 深圳市大富科技股份有限公司 | 腔体滤波器及通信设备 |
CN202308228U (zh) * | 2011-10-31 | 2012-07-04 | 深圳市大富科技股份有限公司 | 一种锁紧螺母及调谐装置 |
-
2012
- 2012-10-25 DE DE102012020979.7A patent/DE102012020979A1/de not_active Withdrawn
-
2013
- 2013-10-24 CN CN201380062046.XA patent/CN104838537B/zh active Active
- 2013-10-24 WO PCT/EP2013/003226 patent/WO2014063829A1/de active Application Filing
- 2013-10-24 KR KR1020157013873A patent/KR101720261B1/ko active IP Right Grant
- 2013-10-24 CA CA2886911A patent/CA2886911A1/en not_active Abandoned
- 2013-10-24 EP EP13782980.0A patent/EP2912714B1/de active Active
- 2013-10-24 US US14/438,725 patent/US9748622B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE1265316B (de) * | 1963-07-31 | 1968-04-04 | Siemens Ag | Bandfilter fuer sehr kurze elektromagnetische Wellen |
EP0068919A1 (de) * | 1981-06-02 | 1983-01-05 | Thomson-Csf | Mikrowellenresonator vom Typ eines mit Dielektrikum versehenen veränderbaren Kondensators |
WO2000064001A1 (de) * | 1999-04-15 | 2000-10-26 | Kathrein-Werke Kg | Hochfrequenzfilter |
WO2006058965A1 (en) * | 2004-11-30 | 2006-06-08 | Filtronic Comtek Oy | Temperature-compensated resonator |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017005926A1 (de) | 2015-07-09 | 2017-01-12 | Kathrein-Werke Kg | Gewindelose abstimmelemente für koaxialresonatoren und verfahren zur abstimmung derselben |
DE102015008894A1 (de) | 2015-07-09 | 2017-01-12 | Kathrein-Werke Kg | Gewindelose Abstimmelemente für Koaxialresonatoren und Verfahren zur Abstimmung derselben |
CN107851877A (zh) * | 2015-07-09 | 2018-03-27 | 凯瑟雷恩工厂两合公司 | 用于同轴谐振器的无螺纹的调谐元件以及用于对调谐元件进行调谐的方法 |
US10651529B2 (en) | 2015-07-09 | 2020-05-12 | Kathrein-Werke Kg | Threadless tuning elements for coaxial resonators, and method for tuning same |
CN107851877B (zh) * | 2015-07-09 | 2020-05-19 | 凯瑟雷恩欧洲股份公司 | 用于同轴谐振器的无螺纹的调谐元件以及用于对调谐元件进行调谐的方法 |
Also Published As
Publication number | Publication date |
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KR101720261B1 (ko) | 2017-04-10 |
CN104838537B (zh) | 2017-09-26 |
KR20150079832A (ko) | 2015-07-08 |
CN104838537A (zh) | 2015-08-12 |
EP2912714B1 (de) | 2017-11-01 |
US20150288043A1 (en) | 2015-10-08 |
DE102012020979A1 (de) | 2014-04-30 |
US9748622B2 (en) | 2017-08-29 |
EP2912714A1 (de) | 2015-09-02 |
CA2886911A1 (en) | 2014-05-01 |
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