EP1117146A1 - Résonateur, notamment pour filtre hyperfréquence, et filtre le comportant - Google Patents
Résonateur, notamment pour filtre hyperfréquence, et filtre le comportant Download PDFInfo
- Publication number
- EP1117146A1 EP1117146A1 EP01400061A EP01400061A EP1117146A1 EP 1117146 A1 EP1117146 A1 EP 1117146A1 EP 01400061 A EP01400061 A EP 01400061A EP 01400061 A EP01400061 A EP 01400061A EP 1117146 A1 EP1117146 A1 EP 1117146A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- resonator
- cavity
- microwave
- filter
- elements
- 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
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 239000003989 dielectric material Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
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
- H01P1/207—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
- H01P1/2086—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators multimode
-
- 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
Definitions
- the invention relates to a cavity type microwave resonator. resonant, provided with a conductive wall, in which a resonator element dielectric material is positioned. It also relates to a microwave filter comprising more particularly this resonator.
- such microwave resonators have for characteristic of being able to be excited only in a narrow frequency band extending around a resonant frequency. They are conventionally implemented to make microwave filters organized around one or more of these resonators connected in series. As reported, this patent 2734084, the resonators and microwave filters made previously had a design that made it tricky to produce. Furthermore, the heat exchanges between the elements resonators and the cavities, in which these elements were placed, appeared insufficient, this being in particular due to the presence of organs made of material thermally insulating, to keep the resonator elements in position.
- resonator elements have therefore been proposed in the patent mentioned more above, to solve the problems mentioned above.
- One of the variants presented provides for the implementation of a thin and planar resonator element which is positioned in a resonant cavity with a conductive wall.
- This element is made of material dielectric in at least an approximate form of parallelogram it is dimensioned and mounted in such a way that the vertices of the parallelogram are short-circuited together by the conductive wall, either conductively or only for microwave waves.
- the resonator obtained according to this variant has the disadvantage of not allowing sufficient recovery of the energy which provided and to be relatively difficult to resolve.
- the present invention therefore proposes a microwave resonator, especially for a filter, comprising a cavity, resonant and with a conductive wall, in which are positioned a planar resonator element, tuning means frequency and intermodal coupling means, the planar resonator element being made of dielectric material in at least an approximate form of parallelogram and being arranged transversely in the cavity so that the vertices of the parallelogram that it forms, are at least hyper-frequency short-circuited between them by the conductive wall.
- said resonator comprises at least another planar resonator element, made of dielectric material in a form less approximate parallelogram, the resonator elements being arranged close, parallel to each other and transversely to a central axis of the cavity, thus that frequency tuning means and intermode coupling means positioned between the parallel resonator elements.
- This leads to the resonator has an enlarged useful band.
- the invention also provides a microwave filter, which is characterized in that that it comprises at least one microwave resonator, as mentioned above, which are associated with microwave energy injection means at the input of filter, for excitation of the resonator (s), and energy extraction means resonance filter output, as well as coupling means between resonators in series, when the filter includes more than one resonator.
- Figure 1 shows a diagram of a microwave resonator, according to the invention.
- FIG. 2 shows a sectional view of the resonator according to FIG. 1.
- Figure 3 shows a sectional diagram of a microwave filter comprising resonators according to the invention.
- FIG. 4 presents a diagram illustrating the response in transmission and the reflection losses of an example filter according to the invention.
- the microwave resonator shown in Figure 1, has a cavity resonant 1, the wall 2 of which is electrically conductive.
- this cavity may have a quadrangular section; in the preferred form of embodiment shown, this cavity is of circular cross section and it extends internally along the length of a cylindrical tube element of revolution 3 of which the ends are closed.
- the tube element is for example made of a metal good driver.
- Flat resonator elements such as 4 and 4 ', are mounted in the area central cavity where they are arranged in parallel, transverse to the axis longitudinal central YY 'of this cavity and close to one another.
- These elements resonators are made of a dielectric material which preferably has a high dielectric constant E, high overvoltage factor Q and low coefficient variation in resonant frequency as a function of temperature.
- the resonator is excited in mode fundamental TE 101, this makes it possible to obtain frequencies of use relatively the lowest possible for given dimensions of the resonator.
- the resonator elements are essentially planar, even if they are likely to have iris-like openings for coupling purposes and localized variations in thickness, such as in particular excess thicknesses in thermal bonding areas. As already proposed in French patent 2734084, they are preferably and at least approximately in the form of parallelograms. In the exemplary embodiment presented, the resonator elements are square in shape. The vertices of the parallelograms, or squares, are softened to match the shape of the interior wall of the cavity where they are positioned and with which they provide most of the heat exchange, for the element resonator of which they are a part, when the latter is excited.
- the vertices of the squares which constitute the resonator elements 4, 4 ′ are therefore rounded in addition to the internal wall 2 of the cylinder of revolution delimiting the cavity 1.
- the connection between these vertices and the wall 2 takes place either by direct conduction, if the resonator elements are directly fixed in abutment this wall, as shown in FIG. 2. It takes place hyper-frequency, if each vertex is pressed against the wall by a thin intermediate element of fixing, in a known manner not developed here.
- This element is for example from elastic nature, to hold each resonator element in position, while compensating for dimensional variations due to temperature variations.
- Such mounting can be designed in a known manner to allow coupling microwave between the resonator elements and the internal wall of a cavity resonant to the operating frequency.
- the resonator elements housed inside a cavity are preferably positioned close to each other in the middle zone of the cavity and means frequency tuning, as well as coupling means, are provided in a space provided for their positioning between the parallel resonators, thus as seen in Figure 1.
- first screw tuning setting 5 in a first mode.
- This first screw is arranged perpendicular to the axis YY 'of the cavity whose wall it crosses, so that more or less protrude into the cavity.
- a second adjusting screw 6 on a second mode is mounted, coplanar and similarly, along an axis perpendicular to that of screw 5.
- a third tuning screw 7 allows to vary the energy coupling between the excitation modes of the resonator, it is mounted in the plane of the other two screws, at 45 ° angle to the axis of each of these.
- the parallelization of resonator elements makes it possible to widen the useful band of the microwave resonator, which includes them, by allowing a better excitation of the modes.
- a gain of around 3.4 is per example obtained with a microwave resonator with a cylindrical cavity of revolution containing two planar and square resonator elements whose vertices are short-circuited by the internal wall of the cavity.
- FIG. 3 shows a section of a microwave filter 8 comprising a plurality of microwave resonators, such as 1A and 1N, according to the invention. These resonators are aligned along the same axis which constitutes the longitudinal and central axis of the filter. Transverse walls, such as 9A and 9N, are placed in the element tubular that constitutes the series of microwave resonators and separates the cavities of these resonators taken by two. These partitions are arranged so as to allow coupling between the cavities of the resonators that they separate. This coupling is likely to be obtained by any suitable means and for example by an opening, such as 10A or 10N, of the slit or iris type, here assumed to be made in the middle of partition. The partitions, as well as the tubular element, are made in the materials usually used in this field.
- the microwave filter 8 has an input cavity which is here constituted by the resonant cavity of a resonator according to the invention, such here the cavity 1A.
- These coupling means are located upstream of the resonator elements 4A, 4A 'that contains the cavity and they are for example constituted in the form of a probe 11.
- the input cavity is excited according to a TE mode, such as TE 101, which makes it possible to obtain a resonant frequency relatively low for given dimensions, as well as a useful width band improved compared to the resonator equivalent to a single resonator element, as already indicated above.
- One or more microwave resonators may be fitted in series following the input resonator, either in the same tubular element, as shown, either possibly in aligned tubular elements and joined.
- Each resonator according to the invention comprises two resonator elements in a cavity, such as 4A and 4A 'for the resonator whose cavity is 1A, and means agreement and coupling, such as those referenced 5A, 6A, 7A or 5N, 6N, 7N for resonators whose cavities are 1A and 1N.
- the resonator whose cavity is here referenced 1N and which is located last in the filter resonator suite 8, includes means for extracting of the filter the resonant microwave energy which it has allowed to filter. These extraction means here consist of a probe 12.
- a diagram is presented by way of nonlimiting example in FIG. 4, it shows the effectiveness of a filter according to the invention.
- the units chosen for the ordinates on this diagram are respectively 10 dB per box for the curve transmission, 5 dB per box for the loss curve, as well as 200 MHz per box for the abscissa.
- This filter has four poles of 47 MHz of useful band and it is assumed to be centered on a frequency of 1655 MHz.
- the transmission curve T of filter as a function of frequency shows that its transmission window is around of 47 MHz for the maximum transmission window and of the order of 94 MHz at-25dB.
- the curve R shows in correspondence, the shape of the losses of reflection in frequency function.
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- Filters And Equalizers (AREA)
Abstract
Description
Claims (4)
- Résonateur hyperfréquence, notamment pour filtre, comportant une cavité résonante (1) dont la paroi (2) est conductrice, dans laquelle sont positionnés un élément résonateur plan (4), des moyens d'accord fréquentiel (5) et des moyens de couplage intermode (6, 7), l'élément résonateur plan, réalisé en matériau diélectrique sous une forme au moins approximative de parallélogramme, étant disposé transversalement dans la cavité de telle manière que les sommets du parallélogramme soient au moins hyperfréquentiellement court-circuités entre eux par la paroi, ledit résonateur étant caractérisé en ce qu'il comporte au moins un autre élément résonateur plan (4'), réalisé en matériau diélectrique sous une forme au moins approximative de parallélogramme, les éléments résonateurs étant disposés proches, parallèles entre eux et transversalement à un axe central (YY') de la cavité et en ce que les moyens d'accord fréquentiel et les moyens de couplage intermode sont positionnés entre les éléments résonateurs parallèles.
- Résonateur hyperfréquence, selon la revendication 1, comportant au moins deux résonateurs plans et parallèles ayant des épaisseurs différentes.
- Résonateur hyperfréquence, selon l'une des revendications 1, 2, dans lequel la cavité a une forme cylindrique de révolution et contient des éléments résonateurs, minces et plans, réalisés chacun en un matériau diélectrique et sous une forme au moins approximativement carrée.
- Filtre hyperfréquence, comportant au moins un résonateur hyperfréquence selon l'une des revendications précédentes auquel sont associés des moyens d'injection d'énergie hyperfréquence (11) placés en amont du ou des résonateurs et des moyens d'extraction de l'énergie de résonance (12) placés en aval, ainsi que des moyens de couplage (10A, 10N) entre résonateurs en série, lorsque le filtre comporte plus d'un résonateur.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0000312 | 2000-01-12 | ||
| FR0000312A FR2803693B1 (fr) | 2000-01-12 | 2000-01-12 | Resonateur, notamment pour fil trehyperfrequence, et filtre le comportant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1117146A1 true EP1117146A1 (fr) | 2001-07-18 |
| EP1117146B1 EP1117146B1 (fr) | 2008-04-09 |
Family
ID=8845802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01400061A Expired - Lifetime EP1117146B1 (fr) | 2000-01-12 | 2001-01-11 | Résonateur, notamment pour filtre hyperfréquence, et filtre le comportant |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6462634B2 (fr) |
| EP (1) | EP1117146B1 (fr) |
| JP (1) | JP4527293B2 (fr) |
| AT (1) | ATE392021T1 (fr) |
| CA (1) | CA2332381C (fr) |
| DE (1) | DE60133500T2 (fr) |
| ES (1) | ES2304372T3 (fr) |
| FR (1) | FR2803693B1 (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6904666B2 (en) * | 2003-07-31 | 2005-06-14 | Andrew Corporation | Method of manufacturing microwave filter components and microwave filter components formed thereby |
| FR2860926B1 (fr) * | 2003-10-14 | 2006-01-27 | Cit Alcatel | Dispositif de filtrage de signaux en bande k, a resonateur dielectrique a materiau non compense en temperature |
| AU2008336271A1 (en) * | 2007-12-13 | 2009-06-18 | Triasx Pty Ltd | A microwave filter |
| FR3005209B1 (fr) * | 2013-04-26 | 2015-04-10 | Thales Sa | Filtre hyperfrequence avec element dielectrique |
| FR3015783B1 (fr) * | 2013-12-20 | 2016-01-15 | Thales Sa | Filtre hyperfrequence passe bande accordable par rotation relative d'une section d'insert et d'un element dielectrique |
| CN114614222B (zh) * | 2020-12-03 | 2026-04-28 | 中兴通讯股份有限公司 | 介质滤波单元及介质滤波器 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5083102A (en) * | 1988-05-26 | 1992-01-21 | University Of Maryland | Dual mode dielectric resonator filters without iris |
| EP0742603A1 (fr) * | 1995-05-12 | 1996-11-13 | Alcatel N.V. | Résonateur diélectrique pour un filtre hyperfréquence, et filtre incluant un tel résonateur |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07154115A (ja) * | 1993-11-30 | 1995-06-16 | Murata Mfg Co Ltd | 誘電体共振器及び誘電体共振器の共振周波数調整方法 |
| FR2755544B1 (fr) * | 1996-11-05 | 1999-01-22 | Centre Nat Etd Spatiales | Dispositif de filtrage a cavite metallique a inserts dielectriques |
-
2000
- 2000-01-12 FR FR0000312A patent/FR2803693B1/fr not_active Expired - Lifetime
-
2001
- 2001-01-05 US US09/754,342 patent/US6462634B2/en not_active Expired - Lifetime
- 2001-01-08 CA CA2332381A patent/CA2332381C/fr not_active Expired - Lifetime
- 2001-01-10 JP JP2001002058A patent/JP4527293B2/ja not_active Expired - Fee Related
- 2001-01-11 EP EP01400061A patent/EP1117146B1/fr not_active Expired - Lifetime
- 2001-01-11 ES ES01400061T patent/ES2304372T3/es not_active Expired - Lifetime
- 2001-01-11 AT AT01400061T patent/ATE392021T1/de not_active IP Right Cessation
- 2001-01-11 DE DE60133500T patent/DE60133500T2/de not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5083102A (en) * | 1988-05-26 | 1992-01-21 | University Of Maryland | Dual mode dielectric resonator filters without iris |
| EP0742603A1 (fr) * | 1995-05-12 | 1996-11-13 | Alcatel N.V. | Résonateur diélectrique pour un filtre hyperfréquence, et filtre incluant un tel résonateur |
Non-Patent Citations (2)
| Title |
|---|
| GENDRAUD S ET AL: "DESIGN AND REALIZATION OF A FOUR POLE ELLIPTIC MICROWAVE FILTER USING LOW DIELECTRIC LOADED CAVITIES", IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST,US,NEW YORK, NY: IEEE, 8 June 1997 (1997-06-08), pages 1091 - 1094, XP000767684, ISBN: 0-7803-3815-4 * |
| MADRANGEAS V ET AL: "A NEW FINITE ELEMENT METHOD FORMULATION APPLIED TO D.R. MICROWAVE FILTER DESIGN", MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST,US,NEW YORK, IEEE, vol. -, 8 May 1990 (1990-05-08), pages 415 - 418, XP000143919 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1117146B1 (fr) | 2008-04-09 |
| CA2332381A1 (fr) | 2001-07-12 |
| DE60133500T2 (de) | 2009-06-18 |
| JP2001244712A (ja) | 2001-09-07 |
| ES2304372T3 (es) | 2008-10-16 |
| FR2803693A1 (fr) | 2001-07-13 |
| FR2803693B1 (fr) | 2003-06-20 |
| ATE392021T1 (de) | 2008-04-15 |
| US6462634B2 (en) | 2002-10-08 |
| US20010007439A1 (en) | 2001-07-12 |
| CA2332381C (fr) | 2010-03-23 |
| DE60133500D1 (de) | 2008-05-21 |
| JP4527293B2 (ja) | 2010-08-18 |
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