EP1570542A1 - Tunable high-frequency filter arrangement and method for the production thereof - Google Patents
Tunable high-frequency filter arrangement and method for the production thereofInfo
- Publication number
- EP1570542A1 EP1570542A1 EP03812541A EP03812541A EP1570542A1 EP 1570542 A1 EP1570542 A1 EP 1570542A1 EP 03812541 A EP03812541 A EP 03812541A EP 03812541 A EP03812541 A EP 03812541A EP 1570542 A1 EP1570542 A1 EP 1570542A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter arrangement
- frequency filter
- arrangement according
- dielectric resonator
- dielectric
- 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
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
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- 229910052709 silver Inorganic materials 0.000 claims description 4
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
-
- 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
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
Definitions
- the present invention relates to the field of radio frequency technology. It relates to a tunable high-frequency filter arrangement according to the preamble of claim 1 and a method for its production.
- Such a high-frequency filter arrangement is known, for example, from US-A-6,147,577.
- a single tunable dielectric resonator in which the movable dielectric body can be moved linearly in a recess of the dielectric resonator element in the vertical or horizontal direction, is known, for example, from EP-A1-0 601 369. STATE OF THE ART
- Transportable directional radio links have proven their worth in the frequency range of several GHz (e.g. 4.4 to 5 GHz; or 14.62) for the fast and flexible establishment of wireless communication networks, especially in rough terrain without the appropriate infrastructure up to 15.23 GHz) work.
- Corresponding filters in particular bandpass filters, are required for signal processing in the context of the transmitters and receivers of such directional radio connections. These filters are not only designed for individual frequencies, but can also be tuned automatically and are characterized by consistently high quality levels over the tuning range.
- filters of this type must also be inexpensive to produce, robust in construction, safe to use, and designed to save space and weight.
- Space (volume) and weight in particular are essential factors for the mobility of the entire communication system.
- solutions of this type have been increasingly proposed in the past, which have as a tunable basic element a dielectric resonator element arranged in a cavity that can be changed in its resonance configuration in order to tune the filter.
- a dielectric resonator element arranged in a cavity that can be changed in its resonance configuration in order to tune the filter.
- a first round dielectric disk (“ceramic puck”) is arranged in a stationary manner in each of the cavities of the filter as a resonator.
- a similar second round dielectric disk lies parallel above the first and can be moved relative to the first by means of an electronically controlled motor drive the first disc is raised vertically and then lowered again.
- the linear movement required for this is generated by a digital stepper motor, whose rotary movement is converted into a linear movement by an elaborate threaded rod mechanism.
- This known filter arrangement has various disadvantages: on the one hand, it is comparatively difficult to achieve the comparatively high accuracy and reproducibility of the disc position which is necessary for the filter to be able to be tuned well, with a linear movement of the displaceable disc. On the other hand, the adjustment mechanism required for the linear displacement requires a lot of space. As can be easily seen from Fig.
- the motorized adjustment mechanism arranged above the cavities takes up about 2/3 of the total construction volume of the filter.
- the cavity must be designed to be comparatively high from the outset.
- EP-A1-0 601 369 which was also mentioned at the beginning, a single tunable dielectric resonator is proposed, in which an eccentric (eccentric) recess is provided in the dielectric disk, which is arranged in a fixed manner in a cavity, into which a recess the recess of suitably shaped dielectric bodies can more or less immerse.
- the resonator is tuned by adjusting the immersion depth.
- the dielectric body can be moved linearly via a rod-shaped holder in the vertical (FIG. 1 of EP-A1-0 601 369) or horizontal (FIG. 2 of EP-A1-0 601 369).
- No further details are given about the voting behavior that can be achieved with this solution.
- no mechanically designed adjustment mechanism is specified, so that this proposal is more of the paper state of the art and its feasibility is more than questionable.
- the same disadvantages due to the linear displacement can also be expected in this proposed solution, as have already been discussed above.
- the object is achieved by the entirety of the features of claims 1 and 27.
- the essence of the invention is to provide as a tunable filter module a cavity with a fixedly arranged dielectric resonator element, which has an eccentric recess in which a dielectric body is rotatably arranged. Due to the rotatable arrangement of the body in the recess, the dielectric resonator element can be made extremely compact. The rotary movement can be carried out with high precision, so that a high degree of accuracy and reproducibility can be achieved during the coordination.
- a preferred embodiment of the inventive filter arrangement is characterized in that the dielectric resonator element has the shape of a flat, circular disk, that the dielectric body is rotatable about an axis of rotation that is perpendicular to the disk plane of the dielectric resonator element, that the dielectric resonator element is a predetermined one Has thickness, and that the dielectric body in the direction of the axis of rotation has a height which is substantially equal to the thickness of the dielectric resonator element.
- the recess in the dielectric resonator element is a circular-cylindrical through hole concentric with the axis of rotation
- the outer dimensions of the dielectric body are fitted into the recess in the dielectric resonator element in such a way that both are only are separated from one another by narrow air gaps
- the dielectric body is delimited in a first direction perpendicular to the axis of rotation by two parallel, flat surfaces and in a second direction perpendicular to the axis of rotation and to the first direction by two cylindrical jacket surfaces concentric to the axis of rotation.
- Unwanted interference fields in the dielectric resonator element and in the metallic cavity are preferably suppressed in that the dielectric resonator element has a central through hole.
- the dielectric resonator element and the dielectric body each consist of the same material.
- the at least one filter is accommodated in a, preferably rectangular, filter housing
- the filter housing is constructed from a floor plate and wall plates for the side walls that are perpendicular to the floor plate the top is covered by a motor support plate lying parallel to the floor plate
- the cavities of the filter are formed by separating plates drawn into the filter housing and standing vertically on the floor plate
- mounting slots are provided in the floor plate, in the wall plates and in the separating plates, by means of which the Sheets are inserted into one another and connected to one another, in particular soldered.
- the electromagnetic interaction of the cavities is achieved in a particularly simple manner in that coupling openings, in particular coupling slots, are provided in individual partition plates at predetermined locations.
- a, preferably circular, opening is provided in the motor support plate above each of the cavities, through which the respective dielectric resonator element and the respective dielectric body are held in the cavity, that the dielectric resonator element and the dielectric bodies are part of a tuning unit assigned to the cavity, which is fastened on the motor support plate, and that the tuning unit in each case has a fixed holder for the dielectric resonator element which extends through the opening in the motor mounting plate, and one through the opening in the motor mounting plate.
- the arrangement is particularly space-saving if, according to a preferred development, the gear unit is accommodated in a housing, the housing is fastened to the motor support plate, the motor is flanged to the housing, and the holder of the dielectric resonator element is fastened to the housing.
- the gear unit comprises an axis-shaped rotary element which is mounted in a preloaded precision bearing and which is firmly connected to the holder for the dielectric body, that the rotary element within the gear unit is driven by a drive shaft via a gear wheel which is firmly seated on the rotary element is driven, which is connected to the motor and is in engagement with the gear via a worm, and that the rotary element is biased in the direction of rotation to eliminate play, preferably by a spiral spring.
- gear wheel as a segment of a circle rather than a full wheel.
- segment-shaped configuration with a segment angle of approximately 100 ° is completely sufficient to exhaust the entire sensible adjustment range of approximately 90 ° of the dielectric body in the recess of the dielectric resonator element.
- a particularly reliable coordination with high reproducibility is achieved in that a control is provided for controlling the rotation of the dielectric bodies in the eccentric recesses of the dielectric resonator bodies, which comprises a control block, a memory and an input unit that for determining the initial position of the dielectric body in the high-frequency filter arrangement position transmitter, in particular in the form of Light barriers are provided, which are connected to the control block, and that value tables are stored in the memory, which few selected frequencies of the high-frequency filter arrangement assign a corresponding angular position of the dielectric body.
- a preferred embodiment of the method according to the invention is characterized in that the sheet metal parts are silver-plated and are soldered to one another by means of a silver solder, that the sheet metal parts have assembly aids, in particular in the form of coordinated intersection slots, assembly slots and mounting lugs, that the sheet metal parts by means of the assembly aids or the intersection slots, mounting slots and mounting tabs are initially loosely plugged together to form the filter housing and the plugged filter housing is mechanically stabilized by caulking the mounting tabs in the mounting slots, that silver solder, preferably in paste form, is applied to the connection points between the plugged sheet metal parts, and that the plugged together Sheet metal parts, preferably in an oven, are heated to such an extent that the silver solder melts and flows into the connection points.
- Production is particularly simple and cost-effective if all sheet metal parts of a filter housing are cut out of a common, unsilvered sheet metal sheet by means of a cutting process, preferably by means of laser cutting, such that the sheet metal parts cut out are only connected to the remaining area of the sheet metal sheet by a few narrow webs, that the sheet metal with the cut-out sheet metal parts is then silvered, that the sheet metal parts are removed from the sheet metal sheet after silvering and then used to assemble the filter housing, with the webs in particular remaining mostly at the locations of the sheet metal parts that are outside the finished filter housing of the cavities.
- Fig. 1 in an overall perspective view of the filter housing (the
- Filter box of a high-frequency filter arrangement according to a preferred exemplary embodiment of the invention for a total of three filters arranged next to one another, each comprising four cavities arranged in a square and coupled to one another (the tuning units with the dielectric resonator elements and adjustable dielectric bodies are omitted for the sake of clarity);
- FIG. 2 shows the filter housing from FIG. 1 in a side view on the long side with the inputs and outputs of the three filters;
- FIG. 3 shows the filter housing from FIG. 1 in a side view on the transverse side
- Fig. 4 is a perspective view of a plate that is used as a wall plate for the transverse sides of the filter housing of Figure 1 and as a transverse partition between the three filters.
- Figure 5 is a perspective view of a sheet used in the filter housing of Figure 1 as a transverse divider with a coupling opening between the four cavities within each of the three filters.
- FIG. 6 is a perspective view of a plate which is in the filter housing according to FIG. 1 as a separating plate running in the longitudinal direction with a coupling. openings between the front and rear cavities of all three filters is used;
- Fig. 7 is a perspective view of the bottom plate of the filter housing according to Fig. 1 with a plurality of mounting slots in which the
- Partitions and wall plates according to Figures 2 to 5 can be inserted with their tabs and can be soldered;
- FIG. 8 shows the perspective view of a tuning unit with motor, gear unit, dielectric resonator element and rotatable dielectric body
- FIG. 9 shows the tuning unit from FIG. 8 in a view from below
- FIG. 10 shows a longitudinal section through the gear unit of the tuning unit from FIG. 8;
- FIG. 11 shows the perspective view of the gear segment-shaped gear from the gear unit according to FIG. 10;
- FIG. 12 shows the perspective view of the dielectric resonator element of the tuning unit according to FIG. 8;
- Fig. 13 is a perspective view of the rotatable dielectric body of the tuning unit shown in Fig. 8;
- Fig. 14 shows the basic arrangement of the cavities of a filter in one
- FIG. 15 shows an arrangement of the cavities of a filter in a row that is alternative to FIG. 14;
- FIG. 16 shows the basic circuit diagram of a control of the high-frequency filter arrangement according to the invention.
- FIG. 17 shows the arrangement and design of the sheet metal parts for a filter housing according to FIG. 1 on a common sheet metal plate;
- the tunable high-frequency filter arrangement described below comprises a filter housing (10 FIG. 1) in which a plurality of tuning units (40 in FIG. 8) are inserted and screwed to the motor support plate (13 in FIG. 1). Filter housings and tuning units are explained separately. On the illustration of a fully assembled filter arrangement has been omitted for reasons of simplification.
- the rectangular filter housing (filter box) 10 shown in FIG. 1 is composed of an (overhead) thicker motor support plate 13 and a plurality of sheet metal parts which form the bottom, side walls and (inner) partitions of the filter housing 10.
- the sheet metal parts include the base plate 11 shown individually in FIG. 7, the transverse wall plates 12 and 20 (see also FIG. 4), the longitudinal wall plates 14 and 32 (FIGS. 1, 2) shown in FIG. 4 and 5 individually shown transverse (inner) partition plates 15, .., 19, and the longitudinally lying (inner) partition plate 33 shown individually in FIG. 6.
- the sheet metal parts are made, for example, of a 1 mm thick, silver-plated steel sheet (material 1.4301).
- the motor support plate 13 is made of the same material and is also silver-plated, but has a thickness of, for example, 4 mm.
- the sheet metal parts can be produced in a particularly simple and inexpensive manner by cutting out all sheet metal parts of a filter housing 10 from a common sheet metal plate 69 of a suitable size in the manner shown in FIG. 17.
- the metal plate 69 is initially unsilvered.
- the contours of the required sheet metal parts 11, 12, 14, .., 20, 32 and 33 are first cut out in the sheet metal plate 69, the cut sheet metal parts with the remaining rest of the sheet metal plate 69 at different points by narrow webs stay connected.
- the webs are predominantly arranged at locations on the sheet metal parts which, in later filter housings 10, lie outside the cavities 21,... 24. A missing silver layer at these points has no effect on the high-frequency properties of the cavities.
- the filter housing 10 is made of the individual sheet metal parts 11, 12, 14, .., 20; 32, 33 and the motor support plate 13 formed by soldering and pinning. The soldering is carried out using a suitable silver solder in an oven.
- the sheet metal parts 11, 12, 14, .., 20; For this purpose, 32, 33 are temporarily connected by inserting the mounting lugs and mounting slots provided for this purpose, and by caulking the mounting lugs in the mounting slots, the sheet metal housing formed is mechanically stabilized. Only the wall plates 14, 32 on the long side of the filter housing 10 are pinned at the upper edge to the end faces of the motor support plate 11. A suitable amount of solder is applied in the form of a solder paste to the connection points of the sheet metal parts and distributed in such a way that the gaps present at the connection points are securely closed when soldering. The housing prepared in this way is then heated in an oven to the temperature required for soldering and - after the solder has melted and run in the connection points - is cooled again.
- the base plate 11 and the wall plates 14, 32 arranged on the longitudinal sides of the housing are provided with a plurality of (partially intersecting) mounting slots 39.
- the wall plates 12, 14, 20, and 32 and the partition plates 15, .., 19 and 33 are equipped at their lower edges with matching mounting lugs L1, with which they can be inserted through the mounting slots 39 of the base plate 11 and soldered.
- the transverse wall plates 12 and 20 and separating plates 15,... 19 additionally have mounting lugs L2 on their side edges, with which they can be inserted and soldered through corresponding mounting slots in the longitudinal wall plates 14, 32.
- each of the filters F1, F2 and F3 has an associated input 26, 28, 30 and output 27, 29, 31.
- each of the filters FI, F2 and F3 are coupled to one another in terms of radio frequency. This is done by suitably arranged, elongated coupling slots 35 in the transverse partition plates 15, 17 and 19 (FIG. 5) and in the longitudinal partition plate 33 (FIG. 6).
- the coupling slots 35 are positioned in the present example so that they lie in the middle of the wall of the adjacent cavity or in the vertical center plane of the cavities to be coupled. The importance of this position for the coupling properties will be discussed in more detail.
- the transverse separating plates 16 and 18, which separate the filters F1, F2 and F3 from one another, are naturally not equipped with coupling openings.
- a circular, disc-shaped dielectric resonator element 44 (FIG. 12) is arranged in the center of each of the cavities 21,... 24 formed in the filter housing 10, which significantly determines the high-frequency and transmission properties of the individual cavity and the respective filter as a whole.
- the dielectric resonator element 44 is part of a compact tuning unit 40 belonging to each cavity (FIGS. 8-10).
- the tuning unit 40 is screwed onto the stable motor support plate 13 from above and projects with a fixed holder 46 (FIG. 10), at the end of which the dielectric resonator element 44 is fastened, through an (circular) opening 25 (FIG. 1) into the cavity below.
- the dielectric resonator element 44 has a central circular through bore 58 and an eccentrically arranged circular recess 59 (FIG. 12).
- a dielectric body 45 (FIG. 13) of the same thickness is rotatably mounted about an axis of rotation 60 which is perpendicular to the disk plane of the dielectric resonator element 44.
- the recess 59 is designed as a circular cylindrical through hole concentric with the axis of rotation 60.
- the dielectric dimensions of the dielectric body 45 are fitted into the recess 59 such that the two are separated from one another only by narrow air gaps.
- the dielectric body 45 is in a first direction perpendicular to the axis of rotation 60 through two parallel, flat surfaces 61, 62 and in a second direction perpendicular to the axis of rotation 60 and the first direction by two concentric cylindrical surface surfaces 63, 64 limited (see Fig. 13; the body 45 inserted into the recess can be seen in Fig. 9).
- the dielectric body 45 is preferably made of the same dielectric material as the dielectric resonator element 44. It is attached to the end of a rotatably mounted holder 47 and can be rotated relative to the dielectric resonator element 44 about the axis of rotation 60 by means of the mechanism accommodated in the tuning unit 40. The resonance frequency of the resonator element and thus the center frequency of the filter can be changed by the rotation.
- the tuning unit 40 (FIGS. 8-10) essentially consists of a gear unit 42 and a motor 41 which is flanged to the side of the gear unit 42 and which drives the rotatable holder 47 via the gear unit 42.
- Motor 41 is preferably a stepper motor.
- the gear unit 42 comprises a housing 43, on the underside of which the holder 46 for the fixed dielectric resonator element 44 is fastened.
- An axis-shaped rotary element 49 is rotatably mounted in a through hole that passes vertically through the bottom of the housing 43 by means of a precision bearing 48. cash holder 47 is firmly connected.
- a precision bearing 48 for example, a special, preloaded bearing provided with two ball bearings is used, which is used in hard disk memories of PCs.
- Such bearings are available, for example, under the name "RO Bearing” (after the inventor Rikuro Obara) from the Japanese company Minebea Co, Ltd. Their principle is described, inter alia, in US Pat. No. 5,556,209.
- the precision bearing 48 contributes to this to achieve a positioning accuracy of the dielectric body 45 in the range of a few ⁇ m, which is necessary for an exact matching of the filters F1, F2 and F3.
- a circular sector-shaped gear 51 according to FIG. 11 is fastened on the rotating element 49. Since the full tuning range of the configuration of dielectric resonator element 44 and dielectric body 45 shown in FIG. 9 can be covered by rotating the body through 90 ° from the position shown in FIG. 9, a sector angle for gear 51 is 100 ° more as sufficient. By designing the gear 51 in the form of a circular sector, the gear unit 42 and thus the tuning unit 40 can be constructed to be extremely compact.
- the worm meshes with the gear 51 of a drive shaft 55 which is perpendicular to the axis of rotation 60 and which is connected directly to the motor 41. So that the engagement between the worm and the gear 51 takes place without play, the rotary element is biased in the direction of rotation by means of a spiral spring 50 mounted on the housing 43.
- Two light barriers 52 and 53 are provided in the gear unit 42 for controlling the drive unit 40.
- the first light barrier 52 scans a rod-shaped marking element (not shown in FIG. 10), which is located in a corresponding fastening hole 56, 5? of the gear 51 sits (Fig. 11) and marked the end points of the swivel range.
- the second light barrier 53 scans a position sensor disk 54 seated on the drive shaft 55 and provided with a radial slot.
- the interaction of the two light barriers allows the starting or zero position of the gear 51 and thus the starting position of the dielectric body 45 to be precisely determined.
- the four cavities 21, .., 24 with the dielectric resonator elements 44 and bodies 45 placed in the center are arranged in a square. This is shown again in FIG. 14 using the exemplary filter F3.
- the RF energy is coupled into the first cavity 21, spreads via the coupling slots 35 over the adjacent cavities 22, 23 and 24 and is coupled out again at the last cavity 24.
- the coupling slots 35 lie in the vertical central planes or in the middle of the partitions of the cavities 21,... 24.
- the dielectric resonator elements 44 are turned with their eccentric recesses 59 out of the vertical center plane of the coupling slot 35 closest to the recess by a predetermined angle, which in the example is approximately 57 °.
- This special configuration of the recess and the coupling slot results in a high-frequency behavior of the filter, in which the coupling factor decreases with increasing frequency when the dielectric body 45 is rotated toward the closest coupling slot.
- An additional degree of freedom results from the possibility of an additional coupling between the first cavity 21 and the last cavity 24, as is indicated in FIG. 14 by the S-shaped coupling element.
- FIG. 15 Another configuration of a filter F " , with which - apart from the cross coupling - the same effect can be achieved, is the linear row arrangement of the cavities 21,... 24 according to FIG. 15.
- the coupling slots 35 are arranged centrally and the dielectric resonator elements 44 with their recesses rotated by about 60 ° from the central plane.
- a controller is provided for tuning the filter arrangement by means of the tuning units 40, as is shown in FIG. 16 in a greatly simplified block diagram.
- the controller 65 comprises a control block 66 which, for example, comprises a suitable microprocessor and a number of power outputs corresponding to the number of motors 41.
- the control block 66 controls the stepper motors 41 via the power outputs. It is activated from the outside via an input unit 68.
- the control block 66 works with a storage rather (EPROM) 67 together, in which value tables are stored, which assigns a certain number of steps of the stepper motors 41 to some selected frequency values of the filter. Intermediate values are generated by interpolation.
- the control block 66 also receives signals from the two light barriers 52, 53 per tuning unit 40.
- the dielectric bodies 45 are moved back into their starting position. Reaching the starting position is signaled by corresponding signals from the two light barriers 52, 53. From the starting position, the stepper motors 41 are then switched forward by as many steps as correspond to the table value taken from the memory 67 or a value for the desired frequency determined by interpolation.
- the motors 41 of a filter can all be switched largely simultaneously or following a special algorithm.
- the housing (without the tuning units) has a base area of about 66 mm x 186 mm and a height of about 30 mm.
- Each of the cavities has a base area (A1, .., A4 in Fig. 7) of 28 mm x 28 mm and a height of 20 mm.
- the dielectric resonator element 44 has a thickness of approximately 6 mm, an outer diameter of approximately 15 mm and one. Inner diameter of approximately 6.5 mm.
- the diameter of the eccentric recess 59 is approximately 6 mm, the width of the dielectric body 45 between the parallel, vertical boundary surfaces is approximately 3 mm.
- the tuning unit 40 protrudes only about 24 mm beyond the surface of the motor support plate 13.
- the measured curves for several S parameters of the filter according to the exemplary embodiment are dependent on the frequency at a set value Reproduced center frequency of 4.7 GHz.
- the frequency range is ⁇ 15 MHz around the respective center frequency.
- the application is logarithmic.
- the scale in the vertical direction is 0.5 dB per division for S21 and 5 dB per division for S11.
- the invention results in a tunable high-frequency filter arrangement that can be set up easily and inexpensively, can be tuned very precisely and reproducibly over a wide frequency range, is extremely space-saving and is characterized by very good high-frequency properties.
- several filters of the same type can be accommodated in a common filter housing with little additional effort.
- Housing dielectric resonator element (stationary) dielectric body (movable)
- Gear wheel segment of a circle
- EPROM EPROM
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH211202 | 2002-12-11 | ||
CH02112/02A CH696098A5 (en) | 2002-12-11 | 2002-12-11 | Tunable high-frequency filter assembly as well as methods for their preparation. |
PCT/CH2003/000748 WO2004054033A1 (en) | 2002-12-11 | 2003-11-14 | Tunable high-frequency filter arrangement and method for the production thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1570542A1 true EP1570542A1 (en) | 2005-09-07 |
EP1570542B1 EP1570542B1 (en) | 2013-05-08 |
Family
ID=32477150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03812541.5A Expired - Lifetime EP1570542B1 (en) | 2002-12-11 | 2003-11-14 | Tunable high-frequency filter arrangement and method for the production thereof |
Country Status (13)
Country | Link |
---|---|
US (1) | US7843286B2 (en) |
EP (1) | EP1570542B1 (en) |
JP (1) | JP4067107B2 (en) |
KR (1) | KR101009902B1 (en) |
CN (1) | CN1319210C (en) |
AU (1) | AU2003277464B2 (en) |
CA (1) | CA2509398C (en) |
CH (1) | CH696098A5 (en) |
ES (1) | ES2428792T3 (en) |
IL (1) | IL169030A (en) |
PT (1) | PT1570542E (en) |
WO (1) | WO2004054033A1 (en) |
ZA (1) | ZA200505520B (en) |
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WO2008026493A1 (en) * | 2006-08-31 | 2008-03-06 | Panasonic Corporation | Filter device and method for manufacturing the same |
KR100810971B1 (en) * | 2007-03-12 | 2008-03-10 | 주식회사 에이스테크놀로지 | Method for manufacturing rf device and rf device manufactured by the method |
US20080272860A1 (en) * | 2007-05-01 | 2008-11-06 | M/A-Com, Inc. | Tunable Dielectric Resonator Circuit |
US8704617B2 (en) * | 2008-08-07 | 2014-04-22 | Ace Technologies Corp. | Tunable filter for expanding the tuning range |
KR200467912Y1 (en) | 2011-07-18 | 2013-07-10 | 주식회사 이롬테크 | Radio frequency filter with cavity structure |
EP2800201B1 (en) * | 2011-12-30 | 2018-11-14 | Huawei Technologies Co., Ltd. | High frequency filter |
KR101869757B1 (en) | 2012-02-27 | 2018-06-21 | 주식회사 케이엠더블유 | Radio frequency filter with cavity structure |
KR101386941B1 (en) * | 2012-10-10 | 2014-04-18 | 주식회사 이너트론 | Band rejection filter of assembly type |
KR101334955B1 (en) * | 2012-10-16 | 2013-11-29 | 주식회사 이너트론 | Diplex filter of assembly type |
KR101380343B1 (en) * | 2012-10-16 | 2014-04-02 | 주식회사 이너트론 | Duplexer of assembly type |
KR101386942B1 (en) | 2012-11-26 | 2014-04-18 | 주식회사 이너트론 | Multi band pass filter of assembly type |
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KR101728152B1 (en) * | 2016-09-21 | 2017-04-19 | (주)웨이브텍 | Cavity Type Wireless Frequency Filter And Method For Manufacturing The Same |
CN106992347B (en) * | 2017-04-24 | 2020-04-17 | 广东通宇通讯股份有限公司 | Cavity filter and coupling adjustable resonance rod thereof |
CN113036351A (en) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | Communication device and filter thereof |
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- 2002-12-11 CH CH02112/02A patent/CH696098A5/en not_active IP Right Cessation
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2003
- 2003-11-14 PT PT38125415T patent/PT1570542E/en unknown
- 2003-11-14 CA CA2509398A patent/CA2509398C/en not_active Expired - Lifetime
- 2003-11-14 EP EP03812541.5A patent/EP1570542B1/en not_active Expired - Lifetime
- 2003-11-14 AU AU2003277464A patent/AU2003277464B2/en not_active Expired
- 2003-11-14 KR KR1020057010725A patent/KR101009902B1/en active IP Right Grant
- 2003-11-14 ES ES03812541T patent/ES2428792T3/en not_active Expired - Lifetime
- 2003-11-14 JP JP2004557727A patent/JP4067107B2/en not_active Expired - Lifetime
- 2003-11-14 US US10/537,360 patent/US7843286B2/en active Active
- 2003-11-14 WO PCT/CH2003/000748 patent/WO2004054033A1/en active Application Filing
- 2003-11-14 CN CNB2003801095738A patent/CN1319210C/en not_active Expired - Lifetime
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2005
- 2005-06-06 IL IL169030A patent/IL169030A/en active IP Right Grant
- 2005-08-16 ZA ZA2005/05520A patent/ZA200505520B/en unknown
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Also Published As
Publication number | Publication date |
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IL169030A (en) | 2012-02-29 |
KR101009902B1 (en) | 2011-01-20 |
CN1319210C (en) | 2007-05-30 |
KR20050089042A (en) | 2005-09-07 |
WO2004054033A1 (en) | 2004-06-24 |
CA2509398C (en) | 2012-10-23 |
CA2509398A1 (en) | 2004-06-24 |
AU2003277464B2 (en) | 2009-07-16 |
EP1570542B1 (en) | 2013-05-08 |
US7843286B2 (en) | 2010-11-30 |
CN1745498A (en) | 2006-03-08 |
ES2428792T3 (en) | 2013-11-11 |
US20060103493A1 (en) | 2006-05-18 |
PT1570542E (en) | 2013-08-26 |
JP4067107B2 (en) | 2008-03-26 |
ZA200505520B (en) | 2006-12-27 |
JP2006510243A (en) | 2006-03-23 |
CH696098A5 (en) | 2006-12-15 |
AU2003277464A1 (en) | 2004-06-30 |
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