EP2044648A1 - Hochfrequenzfilter in koaxialer bauweise - Google Patents
Hochfrequenzfilter in koaxialer bauweiseInfo
- Publication number
- EP2044648A1 EP2044648A1 EP07725541A EP07725541A EP2044648A1 EP 2044648 A1 EP2044648 A1 EP 2044648A1 EP 07725541 A EP07725541 A EP 07725541A EP 07725541 A EP07725541 A EP 07725541A EP 2044648 A1 EP2044648 A1 EP 2044648A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- frequency filter
- filter according
- tuning element
- threaded receptacle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims description 62
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003801 milling Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
Definitions
- the invention relates to a high frequency filter in coaxial design, in particular in the manner of a high frequency crossover (such as duplexer) or a bandpass filter or band rejection filter 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 which, on the one hand, the transmission signals from the transmitter to the antenna and, on the other hand, the received signals are transmitted from the antenna to the receiver. the.
- inter alia high-frequency filters in coaxial design are used today.
- a pair of high frequency filters may be used, both of which pass a particular 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, one of which passes frequencies below a frequency between transmit and receive bands and blocks frequencies above that frequency (low pass filter), and the other filter locks frequencies below a frequency between transmit and receive bands and overlying Passing 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.
- This filter comprises a resonator with a cylindrical inner conductor and a cylindrical outer conductor, wherein between a free end of the inner conductor and a cover attached to the outer conductor, a capacitance is formed, which has an influence on the resonance frequency.
- the resonator comprises a tuning element made of dielectric material with which the resonance frequency of the filter can be adjusted. is adjustable.
- the tuning element is movable in the inner conductor of the resonator, whereby the capacitance between the free end of the inner conductor and the lid of the resonator is changed, thereby varying the resonant frequency.
- a generic high-frequency filter has become known, for example, from US Pat. No. 6,734,766 B2.
- a screw or threaded element is provided which passes through a threaded hole in the lid of the resonator and protrudes with his, in the interior of the resonator protruding end into an axial recess in the inner conductor. By turning the setting screw can thus be made a vote of the resonator.
- a dielectric between the inner and outer conductor air is usually used.
- the mechanical length of the resonator corresponds to about 1/4 of the electrical wavelength.
- the resonance of the high-frequency filter thus formed is in a known manner by the length of the inner conductor, by the size of the cavity of the resonator, by the size of the distance between the inner conductor and the opposite lid and especially by the length of the inside of the cavity of the Resonator protruding setting screw determined. The longer the inner conductor is, - A -
- the coupling of the resonators is the weaker the farther the inner conductors of two resonators are away from each other and the smaller the opening of the diaphragm between the inner conductors.
- Such resonators are produced for example by means of milling or casting.
- Corresponding filters can be constructed from several coaxial TEM resonators.
- TEM stands as an abbreviation for transversal-electro-magnetic table.
- the mentioned bandpass filter also consist of coupling diaphragms electrically interconnected resonators, which in turn may also be constructed in milling or casting, which are thus characterized by a relatively simple production with high achievable electrical quality and relatively high temperature stability.
- the inner conductor is preferably provided with a continuous bore, so that from the outside from the underside of the housing a corresponding tool (for example a screwdriver) can be inserted into the inner conductor introduced through bore and can be rotated via a slot engagement, the thread-shaped storage element to change its axial position relative to the inner conductor.
- a corresponding tool for example a screwdriver
- a thread member is used whose external thread has a thread which differs from the thread of the internal thread and the threaded hole, which is penetrated by the thread member.
- the difference of the thread should preferably be at least 0.5% or 1%, especially at least 1.5%. A maximum value of 5% is usually sufficient. accordingly.
- the threads should differ, for example, by 2 to 4%, preferably by 2.5% to 3.5%, in particular by 3%, at least in a section of the internal thread of the threaded bore and / or of the external thread of the thread element.
- the slope or the pitch angle of the outer and thus cooperating internal thread by, for example, 0.5 to 5%, preferably by 1.5% to 5%, in particular 2 to 4%, in particular 2.5 to 3 , 5% or, as mentioned, differ by about 3%.
- This can be a catchy or multi-start thread.
- the thread depth or flank angle of the thread can also be selected differently within wide ranges.
- the adjustment time is significantly reduced. Significantly fewer operations are necessary to adjust and match a single resonator or more resonators of a filter assembly accordingly.
- the balancing elements according to the invention are also inexpensive to manufacture and usable. The rejects are also reduced due to the simple design of the tuning elements.
- FIG. 1 shows a schematic cross-sectional view of a coaxial TEM resonator according to the invention, transverse to the axial extension;
- FIG. 2 is an axial sectional view with respect to the embodiment of Figure 1;
- FIG. 3 shows an enlarged detail illustration for clarification of a tuning element according to the invention;
- Figure 4 is an enlarged detail view A in Figure 3;
- Figure 5 is an enlarged detail B of Figure 3;
- Figure 6 is a schematic cross-sectional view through a four-circuit microwave filter
- FIG. 7 shows an axial section through the embodiment according to FIG. 6;
- FIG. 8 shows a further schematic exemplary embodiment in an axial cross-sectional view comparable to the representation according to FIG. 7;
- FIG. 9 is a fragmentary enlarged axial sectional view according to detail A in FIG. 8.
- Figure 1 is a schematic cross section and in Figure 2 in axial longitudinal section of an inventive single high-frequency filter and shown in Figure 2 in cross section along the line II-II.
- the resonator according to the invention or the high-frequency filter according to the invention is constructed in a coaxial construction and extends along an axis A.
- the resonator comprises an electrically conductive, generally cylindrical or pipe-shaped inner conductor 1, whose lower end Ib sits on a lower end wall 3, which forms a bottom 3 1 of the resonator.
- the inner conductor 1 is housed in a housing 4, which comprises an outer conductor 5, which is connected to the lower end wall 3, ie the bottom, 3 '.
- a further end wall 7 is provided, which according to the embodiment shown forms the bottom 3 'opposite cover 7'.
- All the above-mentioned parts, ie the inner conductor 1, the bottom 3 ', the outer conductor 5 and the cover 7, 7 1 are electrically conductive or coated with an electrically conductive layer, wherein the lower end Ib opposite upper end Ia of the inner conductor 1 at a distance below the lid 7 'forming upper end wall 7 ends.
- the inner conductor is usually mechanically fastened or formed on the end wall forming the base 3 'and is electrically-galvanically connected to this end wall 3.
- the inner conductor 1 it would also be possible for the inner conductor 1 to be connected to the opposite end wall 7, ie, in the embodiment shown, with the end wall 7 forming the cover 7 1 , or formed or fastened thereto and thus connected electrically-galvanically that the free end Ia of the inner conductor 1 would then end at a distance from the bottom wall 3 1 forming end wall 3.
- the diameter of the inner conductor 1 is in the illustrated embodiment cylinder or tubular, but may differ from this form.
- the tubular outer conductor 5, that is, the outer wall of the thus formed housing 4 may have a different cross section, for example, annular, more rectangular or square, be designed generally n-polygonal. Individual outer wall wall sections may have curved cross-sectional shapes.
- the diameter may vary over its axial length of the inner conductor 1, for example, have portions where a larger or smaller diameter is provided. The diameter can change continuously in the axial direction or in a partial length or form steps there, for example, in that the inner conductor passes from a larger diameter section into a smaller diameter section and vice versa.
- rotationally symmetric sections may be provided, for example dish-shaped, which have a larger outer diameter than the outer diameter of the inner conductor seated therebelow. Equally, however, a section with a tapered outer diameter may also be provided here for the inner conductor.
- a section with a tapered outer diameter may also be provided here for the inner conductor.
- the resonance of the RF filter is preferably in the range of 1/4 of the electrical length of the inner conductor. 1
- a bore 9 which is provided with an internal thread 11 at least in an axial partial length, is formed in the end wall 7 seated at a distance above the free end 1a of the inner conductor 1 (ie in the illustrated embodiment in the cover 7 ') as in the detail view according to FIG. 3 and in the enlarged detail view according to FIGS 4 and 5 can be seen.
- a Absti ⁇ unelement 13 can be screwed, which consists of a threaded member 13 'and is therefore provided at least in an axial length with an external thread 15.
- a threaded bushing 8 is provided in the exemplary embodiment shown, which is inserted and anchored in a corresponding recess 109 in the end wall 7, ie in the lid 7 1 .
- this threaded bushing 8 has a flange 109 'located on the inside in the resonator housing, which engages in a corresponding annular recess 7 "in the end wall 7 or in the cover 7 1 , so that the threaded bushing with its inwardly facing surface with the inner surface of the end wall 7, 7 1.
- the mentioned internal thread 11 is then internally formed in this threaded sleeve, into which the shut-off element 13 in the form of the threaded member 13 'with its external thread 15 can be screwed.
- the external thread 15 extends over the tuning element 13 only over a partial length and a thread-free section 15 'is provided.
- This unthreaded portion 15 ' is closer to the end face 13a of the tuning element 13 (which faces the interior 4' of the resonator housing 4) than the outer end face 13b of the tuning element 13.
- the bore 9 (which may in principle in the end wall or the cover 7, 7 'may be introduced, in the illustrated embodiment, however, preferably in the threaded bushing 8, which is incorporated in the lid 7 1 ) designed so that in the bore.
- this distance annular space 17 only very low field strengths are provided.
- the axial height of this distance space may for example be 0.5 mm to several millimeters, for example 0.5 mm to 3 mm, preferably 1 mm.
- the mentioned distance annulus 17 is limited to the inside 4a of the housing with a circumferential annular shoulder 19 which abuts with its inner boundary surface 19 'in a region of the unthreaded portion 15' of the tuning element 13, ie the threaded member 13 'or immediately adjacent thereto ends.
- a ring seal 21 is also provided, for which purpose an annular recess 13b is provided in the tuning element 13 in the embodiment shown, in the embodiment shown immediately adjacent to the transition region from the unthreaded section 15 'to the provided external thread 15.
- the ring seal used therein is supported 21 in the annular recess 23b and lies with its opposite outer periphery of the threaded bushing 8 (in principle the ring seal could also be incorporated in a corresponding annular recess in the threaded bush, so that the ring seal then bears against the tuning element 13 with its inwardly directed outer section).
- the internal thread 11 is not incorporated in the end wall 7 in the form of the lid 7 1 , but in a machined in the end wall 7 threaded bushing 8, the greater axial height has as the thickness of the end wall 7, ie the lid 7 '.
- this difference in the thread that is, these differences in the thread pitch or the pitch angle is usually not more than 5%, so that a preferred range between 2% and 4%, in particular between 2.5% and 3.5%, above all by 3%.
- the threaded sleeve 8 could also be part of the housing, ie in particular the end wall 7 or in particular of the lid 7 '.
- a threaded receptacle 8 ' which is part of the housing and / or may be formed in the form of a separate threaded sleeve 8, at the appropriate place with the housing (in the illustrated embodiment with the end wall 7 and the cover 7 1 ) mechanically fixed and electrically connected.
- the tuning element on the outwardly facing side still has an engagement section 113, which may be configured as slot-shaped, for example.
- an engagement section 113 which may be configured as slot-shaped, for example.
- a tool for example in the form of a screwdriver to twist the thread-shaped tuning element.
- This engaging portion 113 thus faces outward, so it is accessible from the outside.
- the internal thread in the receptacle 8 ' ie in the Threaded sleeve 8 for example, in the central region
- the threaded member 13 'could be designed thread-free, for example, in the central region, since the desired self-locking biasing forces not in the central region, but especially between the axially furthest lying threads of the tuning element and the internal thread 11 of the threaded receptacle 8 1 act.
- FIG. 6 a four-circular microwave filter constructed from coaxial TEM resonators is shown in a schematic axial view in schematic plan view and with reference to FIG.
- the resonance frequency is determined by the length of the individual inner conductor 1, wherein a fine adjustment by further turning on or turning off the tuning or balancing elements 13 in the form of the mentioned thread members 13 'takes place.
- a filter shown in FIGS. 6 and 7 or a corresponding switch in the form of coaxial TEM resonators coupled by coupling diaphragms would comprise at least two external connection sockets for a transmitter and a receiver, between which the filter path is formed.
- the structure corresponds to the structure explained with reference to the other exemplary embodiments, the example being explained here on a two-circuit microfilter using two coaxial TEM resonators.
- the resonator on the right in FIG. 8 is likewise tunable.
- the corresponding tuning element 13 does not rotate differently in the housing 5 and in particular not in the end wall 7, ie in particular not in the cover 7 1 , but at the upper free end Ia of the inner conductor 1.
- the inner conductor 1 is provided with a continuous inner bore 103, so that from the outside, namely from the bottom of the housing forth Tool, for example in the form of a screwdriver, can be introduced into the inner bore 103 to then rotate the sitting at the upper free end 101 tuning element 13.
- the tuning element 13 is further axially rotated out of the inner conductor, so that it projects beyond the upper free end 10 of the inner conductor further into the free interior of the housing, ie the inner boundary wall of the upper lid or the upper end wall 7, 7 first is closer, or it can be rotated further opposite, so that it dips deeper into the inner conductor hole 103.
- the tuning element 13 in the embodiment of Figures 7 and 8 has an outwardly facing engagement portion 103, so that made from the outside without opening the housing 5 via a corresponding tool by immersion in the engagement portion 113, a rotation of the tuning element 13 can be, as this is basically possible from the outside in the embodiment according to Figures 3 to 7.
- the thread-shaped tuning element 13 could interact directly via its external thread 15 with an internal thread on the inner side of the inner conductor bore 103, which would then form the threaded receptacle 8 ', comparable to the threaded receptacle 8 1 in the exemplary embodiment according to FIG. 3
- a threaded bushing 8 which is constructed comparable to the threaded bushing 8 in the exemplary embodiment according to FIGS. 3 to 5 and is seated in the upper section of the inner conductor bore 103, is preferably used for the threaded receptacle 8 '.
- This threaded bush 8 is in turn provided with the illustrated internal thread 11, in which the correspondingly formed external thread 15 of the Tuning element 13 engages.
- the thread design is shown according to the illustrated embodiment with reference to Figures 3 and 5, so that here the same technical effect is realized.
- the threaded bushing 8 for the exemplary embodiment according to FIGS. 3 to 5 is arranged reversely in the inner conductor bore 103, so that the peripheral annular shoulder 19 and the inner limiting surface 19 'explained with reference to FIG. 3 are adjacent to the above lying annular surface 101 'come to rest, which limits the inner conductor 1 and / or the here held threaded bushing 8 at the upper free end 101.
- the illustrated with reference to Figures 3 to 5 ring seal 21 is also provided again, and indeed at the same point as in the embodiment according to Figures 3 to 5.
- the tuning element explained with reference to FIGS. 3 to 5 and also the threaded bush explained with reference to these figures can also be inserted and used at the upper end of the inner conductor 1 with the same design and function or similar design.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006033704A DE102006033704B3 (de) | 2006-07-20 | 2006-07-20 | Hochfrequenzfilter in koaxialer Bauweise, insbesondere nach Art einer Hochfrequenzweiche (z.B. einer Duplex-Weiche) oder eines Bandpassfilters oder Bandsperrfilters |
PCT/EP2007/004645 WO2008009326A1 (de) | 2006-07-20 | 2007-05-24 | Hochfrequenzfilter in koaxialer bauweise |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2044648A1 true EP2044648A1 (de) | 2009-04-08 |
EP2044648B1 EP2044648B1 (de) | 2009-10-21 |
Family
ID=38335572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07725541A Not-in-force EP2044648B1 (de) | 2006-07-20 | 2007-05-24 | Hochfrequenzfilter in koaxialer bauweise |
Country Status (7)
Country | Link |
---|---|
US (1) | US7728700B2 (de) |
EP (1) | EP2044648B1 (de) |
CN (1) | CN101490899B (de) |
AT (1) | ATE446594T1 (de) |
DE (2) | DE102006033704B3 (de) |
HK (1) | HK1131841A1 (de) |
WO (1) | WO2008009326A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8947179B2 (en) | 2010-12-23 | 2015-02-03 | Kathrein-Werke Kg | Tunable high-frequency filter |
US9748622B2 (en) | 2012-10-25 | 2017-08-29 | Kathrein-Werke Kg | Tunable high frequency filter |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009025408B4 (de) * | 2009-06-18 | 2011-09-01 | Kathrein-Austria Ges.M.B.H. | Hohlraumfilter |
CN201944075U (zh) * | 2011-03-11 | 2011-08-24 | 杨志清 | 自紧式防松螺母 |
FI124178B (fi) * | 2011-06-08 | 2014-04-15 | Powerwave Finland Oy | Säädettävä resonaattori |
CN102881965B (zh) * | 2011-07-15 | 2015-02-25 | 凯镭思通讯设备(上海)有限公司 | 用于滤波器的接头与喷塑腔体配合面的密封结构 |
US9236846B2 (en) * | 2011-12-06 | 2016-01-12 | Futurewei Technologies, Inc. | Tunable bandpass filter device and method |
DE102011056710A1 (de) * | 2011-12-20 | 2013-06-20 | Telegärtner Karl Gärtner GmbH | Koaxiales elektrisches Übertragungselement |
CN103311636B (zh) * | 2012-03-15 | 2015-03-11 | 成都赛纳赛德科技有限公司 | 一种谐振腔调谐结构 |
TWI505541B (zh) * | 2013-03-29 | 2015-10-21 | Hon Hai Prec Ind Co Ltd | 空腔濾波器 |
US9112251B2 (en) * | 2013-08-14 | 2015-08-18 | Microelectronics Technology, Inc. | Microwave resonant cavity |
DE102013020428A1 (de) | 2013-12-05 | 2015-06-11 | Kathrein-Werke Kg | Hochfrequenzfilter in koaxialer Bauweise |
CN107112615B (zh) * | 2014-12-31 | 2019-11-26 | 深圳市大富科技股份有限公司 | 腔体滤波器、双工器、信号收发装置、射频拉远设备和塔顶放大器 |
CN107615573A (zh) * | 2015-12-30 | 2018-01-19 | 深圳市大富科技股份有限公司 | 腔体滤波器 |
WO2017113166A1 (zh) * | 2015-12-30 | 2017-07-06 | 深圳市大富科技股份有限公司 | 腔体滤波器、盖板及其压铆螺牙套 |
CN205376695U (zh) * | 2015-12-31 | 2016-07-06 | 东莞鸿爱斯通信科技有限公司 | 调频组件及腔体滤波器 |
DE102016000093A1 (de) * | 2016-01-07 | 2017-07-13 | Kathrein-Werke Kg | Verfahren zum Abstimmen von Hochfrequenzfiltern und ein derartig abgestimmtes Hochfrequenzfilter |
CN108253209A (zh) * | 2016-12-29 | 2018-07-06 | 诠丰精密工具股份有限公司 | 螺纹螺合构造 |
CN107676591A (zh) * | 2017-11-23 | 2018-02-09 | 镇江华京通讯科技有限公司 | 一种焊接射频同轴连接器的固定架 |
CN108825635A (zh) * | 2018-09-14 | 2018-11-16 | 苏州迈特科技有限公司 | 一种防松自锁结构件 |
RU2740684C1 (ru) * | 2020-03-10 | 2021-01-19 | Михаил Борисович Гойхман | Перестраиваемый полосно-запирающий (режекторный) волноводный фильтр |
CN112073022B (zh) * | 2020-08-18 | 2023-10-13 | 安徽蓝麦通信股份有限公司 | 一种带通滤波器 |
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GB569581A (en) | 1943-11-26 | 1945-05-30 | Leo Caspar Steinle | Improvements in or relating to screw-threaded elements |
US3227199A (en) * | 1962-08-13 | 1966-01-04 | United Shoe Machinery Corp | Self-locking threaded fasteners having uninterrupted threads with a pitch deviation therein |
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US3876153A (en) * | 1972-11-29 | 1975-04-08 | Vernon D Roosa | Fuel injector and method for making same |
US3929023A (en) * | 1974-09-27 | 1975-12-30 | Motorola Inc | Tuning screw lock and torque control |
JPS6025213B2 (ja) * | 1979-07-31 | 1985-06-17 | ドネプロペトロフスキイ ゴルニイ インスチテユ−ト イメニ アルテマ | ねじ山の形の内側に閉じられた螺旋空洞を有する弾性ねじの製造方法と工具 |
US4364136A (en) * | 1980-12-02 | 1982-12-21 | William P. Green | Formation of threaded elements having a self-locking action |
DE3429473A1 (de) * | 1984-08-10 | 1986-02-20 | Fichtel & Sachs Ag, 8720 Schweinfurt | Verschraubungssicherung fuer schwingungsdaempfer und federbeine |
DE3601389A1 (de) * | 1986-01-18 | 1987-07-23 | Kellermann Fa Rudolf | Verbindungselement nach art einer schrauben/muttern-verbindung |
US4846614A (en) * | 1986-12-08 | 1989-07-11 | Rolf Steinbock | Differential thread for transfer of screw thread forces |
FR2614151A1 (fr) * | 1987-04-15 | 1988-10-21 | Alcatel Thomson Faisceaux | Oscillateur hyperfrequence a resonateur dielectrique, notamment dans la gamme des 22 ghz |
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US6734766B2 (en) * | 2002-04-16 | 2004-05-11 | Com Dev Ltd. | Microwave filter having a temperature compensating element |
DE10320620B3 (de) * | 2003-05-08 | 2004-11-04 | Kathrein-Werke Kg | Hochfrequenzweiche |
DE10325595B3 (de) * | 2003-06-05 | 2004-12-09 | Kathrein-Werke Kg | Hochfrequenzfilter, insbesondere nach Art einer Duplexweiche |
DE102004010683B3 (de) | 2004-03-04 | 2005-09-08 | Kathrein-Werke Kg | Hochfrequenzfilter |
DE102004055707B3 (de) | 2004-11-18 | 2006-04-27 | Kathrein-Werke Kg | Hochfrequenzfilter und Verfahren zur Abstimmung der Hochfrequenzeigenschaften eines Hochfrequenzfilters |
-
2006
- 2006-07-20 DE DE102006033704A patent/DE102006033704B3/de not_active Expired - Fee Related
-
2007
- 2007-05-24 AT AT07725541T patent/ATE446594T1/de active
- 2007-05-24 EP EP07725541A patent/EP2044648B1/de not_active Not-in-force
- 2007-05-24 WO PCT/EP2007/004645 patent/WO2008009326A1/de active Application Filing
- 2007-05-24 CN CN200780025989XA patent/CN101490899B/zh not_active Expired - Fee Related
- 2007-05-24 DE DE502007001816T patent/DE502007001816D1/de active Active
- 2007-07-19 US US11/826,898 patent/US7728700B2/en not_active Expired - Fee Related
-
2009
- 2009-10-21 HK HK09109719.2A patent/HK1131841A1/xx not_active IP Right Cessation
Non-Patent Citations (1)
Title |
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See references of WO2008009326A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8947179B2 (en) | 2010-12-23 | 2015-02-03 | Kathrein-Werke Kg | Tunable high-frequency filter |
US9748622B2 (en) | 2012-10-25 | 2017-08-29 | Kathrein-Werke Kg | Tunable high frequency filter |
Also Published As
Publication number | Publication date |
---|---|
DE502007001816D1 (de) | 2009-12-03 |
DE102006033704B3 (de) | 2008-01-03 |
HK1131841A1 (en) | 2010-02-05 |
CN101490899A (zh) | 2009-07-22 |
US20080024248A1 (en) | 2008-01-31 |
ATE446594T1 (de) | 2009-11-15 |
CN101490899B (zh) | 2012-11-28 |
EP2044648B1 (de) | 2009-10-21 |
US7728700B2 (en) | 2010-06-01 |
WO2008009326A1 (de) | 2008-01-24 |
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