EP0261634A1 - Abstimmbares Bandfilter - Google Patents
Abstimmbares Bandfilter Download PDFInfo
- Publication number
- EP0261634A1 EP0261634A1 EP87113817A EP87113817A EP0261634A1 EP 0261634 A1 EP0261634 A1 EP 0261634A1 EP 87113817 A EP87113817 A EP 87113817A EP 87113817 A EP87113817 A EP 87113817A EP 0261634 A1 EP0261634 A1 EP 0261634A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity
- substrate
- filter according
- filter
- face
- 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.)
- Withdrawn
Links
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
-
- 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
- H01P1/203—Strip line filters
Definitions
- the invention relates to an adjustable band filter used at high frequencies.
- - circular or rectangular cavity filters in guide
- - coaxial filters cylindrical or rectangular
- ⁇ being the wavelength of the guided wave
- coupled lines length ⁇ ⁇ ⁇ ⁇ / 4
- overtension coefficient less than or equal to 1000
- micro-strip filters on a dielectric support but with very low overvoltage coefficients less than 200 and significant insertion losses
- filters with dielectric resonators with intermediate overvoltage coefficients between 1000 and 3000.
- the object of the invention is to provide a device having the advantages of this type of filter, that is to say: - good reproducibility due to the implementation of a chemical photoengraving process; - low cost due to the simplicity of assembly; - lack of adjustment.
- the device of the invention makes it possible to work in a frequency range extending from 1 GHz to 100 GHz.
- an adjustable band filter comprising a conductive shielding body, formed of two parts joined to one another on either side of a separation plane, inside which is a cavity containing a half-wavelength resonant line formed of resonators in series coupled together by their ends and carried by a first face of a suspended substrate, coupled at the end, and embedded in notches made in the walls of one of the two parts, characterized in that the first face of the substrate divides the cavity into two non-symmetrical volumes so as to allow a modification of the bandwidth of said filter, and in that the substrate is located in the first part of the shielding body and has its first face located in the separation plane.
- the invention makes it possible to produce bandwidth filters of a few% to a few tens of% from 11 to 15 GHz while the principle of filters with end coupling remains vested in a few% of band.
- the invention proposes a filter in which the first face of the substrate is located in the separation plane, and in which the volume of the cavity, located inside the second part, is greater than the one inside the first part.
- the invention provides a filter in which the first part is offset with respect to the second part in a transverse direction located in the separation plane, so as to create a kings discontinuity of the cavity in this plane.
- the invention proposes a filter in which the two parts of the shielding body have their walls in contact in which transverse notches are machined.
- the second part of the shielding body forms a sheath in which the first part can slide so as to modify the position of the substrate in the cavity.
- FIG. 1 represents the filter according to the invention
- FIG. 2 represents a part of the filter illustrated in FIG. 1
- - Figures 3 and 4 are views in cross section and in longitudinal section of the filter according to the invention in which have been shown the different electrostatic capacities.
- - Figures 5 to 8 illustrate several variants of the filter according to the invention.
- the filter of the invention shown in Figure 1, comprises a shielding body (10, 11) of parallelepiped shape inside which is located a cavity 12 of the same shape.
- the shielding body is formed by a first part 10 and a second part 11 located on either side of a plane 13 called "separation".
- a substrate 14 carrying a resonant line 15 in half wavelength, on a first face 16 is embedded in two notches 17 made in said first part 10, so that its first face 16 is located in the separation plane 13 .
- this line is for example a line of microstrip type formed by a series resonator coupled by their ends (series capacitive coupling).
- the length of these resonators is less than or equal to ⁇ / 2 or almost equal to k , k being a constant and ⁇ the wavelength of the guided wave.
- the excitation of the line is done "at the end", and is a longitudinal excitation.
- an asymmetry (proportional to the height of the dielectric) of the upper part is introduced: ie H> H ⁇ .
- a resonator is defined by its impedance and its coupling to the other lines with the formula: with - ⁇ j: electrical length of the resonator - Bj, j + 1: susceptance of the capacitance Cc - yo: line impedance.
- an asymmetry is introduced by shifting (19) the first part 10 relative to the second part 11 in a transverse direction situated in the separation plane 13, but in this case we can have: H ⁇ H ⁇ .
- a dielectric tongue 21 which is superimposed on the line can be inserted (22), as shown in FIG. 6, into a small notch 20 placed in the second part 11 of the shielding body. 15 so as to favor the couplings, in particular at the ends thereof.
- a vertical metallic or dielectric screw could be used, placed in an opening above the circuit 15 which, by adjusting the height of its end, would make it possible to promote said couplings.
- these guides are produced by transverse notches 23 machined in the walls in contact with the two parts 10 and 11 of the shielding body. If these notches are closed, they form rejection stop bands; if they are partially filled with an absorbent material, they form absorption stop bands.
- These notches 23 can be spaced regularly or not.
- stop-band filtering makes it possible to carry out particular rejection, in particular to weaken certain harmonics.
- FIG. 8 represents a housing for an adjustable band filter in which the second part 11 comprises a sheath 24 which envelops the first part 10 which allows a modification 25 of the dimensions of the cavity 12 and of the dimension H relative to the dimension H ⁇ as shown in Figure 1.
- a filter has been produced, as shown in FIG. 1, having the following dimensions, considering the body arranged vertically: - width of the cavity: 5.6 cm - height of the cavity (H + H ⁇ ): 2.85 cm - thickness of the dielectric: 0.254 c, - metallization thickness: 17 ⁇ m - length of the notches (17): 0.5 cm.
- a filter centered on 15 GHz is thus obtained with a passband of 2.7 GHz.
- the shielding body has a very low roughness state.
- the body could have a shape other than a parallelepiped.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8613405 | 1986-09-25 | ||
FR8613405A FR2605146B1 (fr) | 1986-09-25 | 1986-09-25 | Filtre a bande ajustable |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0261634A1 true EP0261634A1 (de) | 1988-03-30 |
Family
ID=9339265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87113817A Withdrawn EP0261634A1 (de) | 1986-09-25 | 1987-09-22 | Abstimmbares Bandfilter |
Country Status (4)
Country | Link |
---|---|
US (1) | US4849722A (de) |
EP (1) | EP0261634A1 (de) |
JP (1) | JPS6387801A (de) |
FR (1) | FR2605146B1 (de) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI88227C (fi) * | 1991-05-09 | 1993-04-13 | Telenokia Oy | Dielektrisk resonator |
US5157364A (en) * | 1991-05-22 | 1992-10-20 | Hughes Aircraft Company | Airline transmission structures in low temperature co-fired ceramic |
US5319329A (en) * | 1992-08-21 | 1994-06-07 | Trw Inc. | Miniature, high performance MMIC compatible filter |
FI97087C (fi) * | 1994-10-05 | 1996-10-10 | Nokia Telecommunications Oy | Dielektrinen resonaattori |
FI97089C (fi) * | 1994-10-05 | 1996-10-10 | Nokia Telecommunications Oy | Dielektrinen resonaattori |
FI97088C (fi) * | 1994-10-05 | 1996-10-10 | Nokia Telecommunications Oy | Dielektrinen resonaattori |
FR2738395B1 (fr) * | 1995-08-31 | 1997-10-10 | Commissariat Energie Atomique | Dispositif autoporte pour la propagation d'ondes hyperfrequences et procedes de realisation d'un tel dispositif |
DE19621335A1 (de) * | 1996-05-28 | 1997-12-04 | Bosch Gmbh Robert | Verfahren zur Abstimmung von planaren supraleitenden Filtern |
US6215644B1 (en) | 1999-09-09 | 2001-04-10 | Jds Uniphase Inc. | High frequency tunable capacitors |
US6522217B1 (en) | 1999-12-01 | 2003-02-18 | E. I. Du Pont De Nemours And Company | Tunable high temperature superconducting filter |
US6496351B2 (en) | 1999-12-15 | 2002-12-17 | Jds Uniphase Inc. | MEMS device members having portions that contact a substrate and associated methods of operating |
US6229684B1 (en) | 1999-12-15 | 2001-05-08 | Jds Uniphase Inc. | Variable capacitor and associated fabrication method |
US6670865B2 (en) * | 2001-06-06 | 2003-12-30 | Noel A. Lopez | Method and apparatus for low loss high frequency transmission |
US20040048420A1 (en) * | 2002-06-25 | 2004-03-11 | Miller Ronald Brooks | Method for embedding an air dielectric transmission line in a printed wiring board(PCB) |
DE10345314A1 (de) * | 2003-09-30 | 2005-04-14 | Robert Bosch Gmbh | Vorrichtung sowie Verfahren zum Abstrahlen und/oder zum Empfangen von elektromagnetischer Strahlung |
JP2007214655A (ja) * | 2006-02-07 | 2007-08-23 | Sharp Corp | 衛星放送受信装置 |
JP5410800B2 (ja) * | 2009-03-24 | 2014-02-05 | 日本無線株式会社 | 片側コルゲート形フィルタ |
US9431691B2 (en) * | 2011-05-20 | 2016-08-30 | M-Tron Industries, Inc. | Voltage tunable filters |
US9467116B2 (en) * | 2011-12-19 | 2016-10-11 | Intel Corporation | Broad band diplexer using suspended strip-line capacitor technology |
JP6070484B2 (ja) * | 2013-08-30 | 2017-02-01 | 日立金属株式会社 | アンテナ装置 |
CN108023148B (zh) * | 2016-10-31 | 2022-02-18 | 康普公司意大利有限责任公司 | 悬浮微带滤波装置和微带滤波装置 |
JP2021052345A (ja) * | 2019-09-26 | 2021-04-01 | 日本アンテナ株式会社 | 帯域通過フィルタ |
CN112467323B (zh) * | 2020-11-27 | 2022-02-01 | 南宁国人射频通信有限公司 | 一种空气悬置线双模滤波器 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2820201A (en) * | 1951-02-28 | 1958-01-14 | Sperry Rand Corp | Selective transfer device for microwave energy |
US2968012A (en) * | 1959-09-15 | 1961-01-10 | Alstadter David | Air dielectric strip-line tunable bandpass filter |
US3117379A (en) * | 1960-11-17 | 1964-01-14 | Sanders Associates Inc | Adjustable impedance strip transmission line |
US3754198A (en) * | 1972-03-20 | 1973-08-21 | Itt | Microstrip filter |
US3882396A (en) * | 1973-08-10 | 1975-05-06 | Bell Telephone Labor Inc | Impedance-matched waveguide frequency converter integrally mounted on stripline |
FR2311418A1 (fr) * | 1975-05-14 | 1976-12-10 | Secr Defence Brit | Circuits integres pour hyperfrequences |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4028650A (en) * | 1972-05-23 | 1977-06-07 | Nippon Hoso Kyokai | Microwave circuits constructed inside a waveguide |
US3863181A (en) * | 1973-12-03 | 1975-01-28 | Bell Telephone Labor Inc | Mode suppressor for strip transmission lines |
US4276655A (en) * | 1979-10-29 | 1981-06-30 | Sperry Corporation | Integrated circuit planar high frequency mixer |
US4365195A (en) * | 1979-12-27 | 1982-12-21 | Communications Satellite Corporation | Coplanar waveguide mounting structure and test fixture for microwave integrated circuits |
US4443314A (en) * | 1983-03-16 | 1984-04-17 | Great Lakes Carbon Corporation | Anode assembly for molten salt electrolysis |
-
1986
- 1986-09-25 FR FR8613405A patent/FR2605146B1/fr not_active Expired
-
1987
- 1987-09-22 EP EP87113817A patent/EP0261634A1/de not_active Withdrawn
- 1987-09-24 JP JP62239893A patent/JPS6387801A/ja active Pending
- 1987-09-25 US US07/101,033 patent/US4849722A/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2820201A (en) * | 1951-02-28 | 1958-01-14 | Sperry Rand Corp | Selective transfer device for microwave energy |
US2968012A (en) * | 1959-09-15 | 1961-01-10 | Alstadter David | Air dielectric strip-line tunable bandpass filter |
US3117379A (en) * | 1960-11-17 | 1964-01-14 | Sanders Associates Inc | Adjustable impedance strip transmission line |
US3754198A (en) * | 1972-03-20 | 1973-08-21 | Itt | Microstrip filter |
US3882396A (en) * | 1973-08-10 | 1975-05-06 | Bell Telephone Labor Inc | Impedance-matched waveguide frequency converter integrally mounted on stripline |
FR2311418A1 (fr) * | 1975-05-14 | 1976-12-10 | Secr Defence Brit | Circuits integres pour hyperfrequences |
Non-Patent Citations (1)
Title |
---|
IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, Dallas, 15-17 juin 1982, pages 389-391; IEEE, Piscataway, US; C.L. REN: "Mode suppressor for dielectric resonator filters" * |
Also Published As
Publication number | Publication date |
---|---|
US4849722A (en) | 1989-07-18 |
JPS6387801A (ja) | 1988-04-19 |
FR2605146B1 (fr) | 1988-12-02 |
FR2605146A1 (fr) | 1988-04-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0261634A1 (de) | Abstimmbares Bandfilter | |
EP0035922B1 (de) | Abstimmungsvorrichtung mit veränderbarer Kapazität und abstimmbares Mikrowellenfilter mit wenigstens einer solchen Vorrichtung | |
EP0114140B1 (de) | Abstimmbarer Mikrowellenfilter mit dielektrischen Resonatoren im TM010 Modus | |
FR2489605A1 (fr) | Filtre hyperfrequence a resonateur dielectrique, accordable dans une grande largeur de bande, et circuit comportant un tel filtre | |
CA2014514C (fr) | Filtre a resonateur dielectrique | |
EP0193162A1 (de) | Mikrowellenbandpassfilter | |
EP0108003B1 (de) | Doppelstreifen-Resonator und nach dieser Art gestaltetes Filter | |
FR2583597A1 (fr) | Filtre passe-bande hyperfrequences en mode evanescent | |
FR2627329A1 (fr) | Filtre a resonateur dielectrique | |
EP0075498B1 (de) | Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren | |
EP1925056B1 (de) | Wellenleiterfilter für mikrowellen mit nicht parallelen wänden | |
WO1998020576A1 (fr) | Dispositif de filtrage a cavite metallique a inserts dielectriques | |
EP0346806B1 (de) | Bandpassfilter mit dielektrischen Resonatoren | |
EP0128798B1 (de) | Abstimmbare selektive Einrichtung mit magnetostatischen Volumenwellen | |
EP1117146B1 (de) | Resonator, insbesondere für ein Mikrowellenfilter und damit versehenes Filter | |
FR2626716A1 (fr) | Filtre a resonateurs plans | |
EP0625823A1 (de) | Hyperfrequenz-Halbleiteranordnung mit Stabilisierungsmitteln | |
EP0022401A1 (de) | Breitbandpolarisator mit niedrigem Elliptizitätsgrad und Mikrowellengerät mit einem solchen Polarisator | |
EP1067617B1 (de) | Bandpassfilter | |
CA2182614A1 (fr) | Dispositif de couplage magnetique entre un conducteur principal d'une ligne tem et un guide d'ondes formant resonateur en lambdag/2" | |
EP0045242A1 (de) | In Hohlleitertechnik ausgeführtes Bandpassfilter für Mikrowellen | |
EP0064458A1 (de) | Bandpassfilter, ausgeführt in Rechteckhohlleitertechnik, mit hoher Selektivität | |
EP0423667A1 (de) | Mikrowellen-Bandfilter in Kammleitungsform | |
EP0738022A1 (de) | Bandpasshohlraumfilter mit Kammleitungsstruktur und Radiohöhenmesser mit einem derartigen Eingangsfilter | |
EP0164050A1 (de) | Filter mit einem Haupthohlleiter der durch mehrere Nebenhohlleiter belastet ist |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT NL SE |
|
17P | Request for examination filed |
Effective date: 19880929 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ALCATEL TRANSMISSION PAR FAISCEAUX HERTZIENS A.T.F |
|
17Q | First examination report despatched |
Effective date: 19910411 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ALCATEL TELSPACE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19920204 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHUBERT, JEAN-DENIS Inventor name: CRUCHON, JEAN-CLAUDE |