EP0594502A1 - Abstimmbarer Mikrowellenbandpassfilter mit Zweimodenresonatoren - Google Patents
Abstimmbarer Mikrowellenbandpassfilter mit Zweimodenresonatoren Download PDFInfo
- Publication number
- EP0594502A1 EP0594502A1 EP93402574A EP93402574A EP0594502A1 EP 0594502 A1 EP0594502 A1 EP 0594502A1 EP 93402574 A EP93402574 A EP 93402574A EP 93402574 A EP93402574 A EP 93402574A EP 0594502 A1 EP0594502 A1 EP 0594502A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavities
- filter
- cavity
- coupling
- mode
- 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- Withdrawn
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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
- H01P1/2082—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with multimode resonators
Definitions
- the present invention relates to a microwave bandpass filter, this filter being an agile filter and comprising dual-mode cavities with parallel coupling, that is to say by iris etvis, as opposed to filters with in-line structures.
- Figures 1 and 2 attached are respectively a perspective view and a schematic cross section of an agile 4-pole filter with two dual-mode cavities, of the known art, of the TE11 n type.
- This filter therefore comprises two cylindrical resonant cavities 1, 2 which are identical and with parallel axes.
- the internal volume of these cavities is adjustable thanks to movable pistons 3, 4 which make it possible to adjust the resonant frequency of each cavity, and therefore to move the tuning frequency of the filter, i.e. to allow frequency agility desired for the latter.
- the input cavity 1 of the filter is supplied by a rectangular waveguide 5 which is coupled to this cavity 1 by a coupling iris 6.
- the cavity 1 then resonates in TE11 mode for example, and provides the orientation of the electric field vector E1.
- a coupling screw 7 at 45 degrees makes it possible to generate, by disturbing this cavity 1, another mode of the same frequency but of electric field vector E2 orthogonal to the first.
- a tuning screw 8 makes it possible to precisely adjust the volume of the cavity 1, so as to compensate in particular for the small disturbance due to the coupling screw 7 and the input iris 6.
- the cavity 1 resonates well in the two TE11n modes, hence its name of "dual-mode cavity".
- the cavity 1 is coupled to the other cavity 2 by a coupling iris 19.
- the latter allows, by coupling of the magnetic field, to resonate this cavity 2 on substantially the same frequency as that of the cavity 1, and according to a mode T11 n electric field E3.
- a 45-degree coupling screw 9 makes it possible to generate, in this cavity 2, a second electric field mode E4 orthogonal to the electric field E3, the latter mode E4 being, by magnetic coupling, coupled to the waveguide of outlet 10 by a coupling iris 11.
- a matching screw 18 is provided as above.
- the invention aims to remedy these drawbacks.
- it relates to an agile microwave filter with several cylindrical dual-mode cavities with parallel coupling, these cavities therefore being bi-mode cylindrical cavities of adjustable volume whose axes are parallel and one of which is coupled to the next. by an iris, and this filter being characterized in that the input coupling and the output coupling of the filter are carried out, respectively on the input cavity and the output cavity, using a formed antenna by the core of a coaxial cable, respectively of input and output of the filter, which is connected to this cavity by a coaxial plug.
- the antennas are placed along an axis perpendicular to the directions of extension of the cavities, while in a second embodiment, the antennas are coaxial with the longitudinal axes of the cavities.
- the agile filter with two dual-mode cavities 1 and 2 differs from that of Figures 1 and 2 in that, on the one hand, the microwave wave is brought by a coaxial cable 12 which is connected to the cavity 1 by a coaxial plug 13 and the core of which extends into this cavity 1 to form a coupling antenna 14, and that on the other hand, and in a completely symmetrical manner, the outgoing wave is obtained by coupling due to an antenna 15 which likewise constitutes the extension in the cavity 2 of the core of the coaxial output cable 16 of the filter, this cable 16 being connected to the cavity 2 by a coaxial plug 17.
- the electric field generated in the cavity 1 is the field E5
- the orthogonal field which is coupled to it by the screw 7 is the field E6
- the field coupled by the iris 19 is the field E7
- the orthogonal field which is coupled to it by the screw 9 is the field E8.
- the output antenna 15 couples to the field E8.
- the antennas 14 and 15 are preferably placed along an axis perpendicular to the directions of extension of the cavities 1 and 2. They are advantageously at the level of the iris 19.
- these input and output couplings are made on the bottom plate 20 of the filter.
- the antennas 14 and 15 are coaxial with the longitudinal axes of the cavities 1 and 2.
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9212649 | 1992-10-22 | ||
FR9212649A FR2697372B1 (fr) | 1992-10-22 | 1992-10-22 | Filtre agile passe-bande hyperfréquences à cavités bi-modes. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0594502A1 true EP0594502A1 (de) | 1994-04-27 |
Family
ID=9434783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93402574A Withdrawn EP0594502A1 (de) | 1992-10-22 | 1993-10-20 | Abstimmbarer Mikrowellenbandpassfilter mit Zweimodenresonatoren |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0594502A1 (de) |
AU (1) | AU4916793A (de) |
CA (1) | CA2108995A1 (de) |
FR (1) | FR2697372B1 (de) |
IL (1) | IL107338A0 (de) |
TW (2) | TW238437B (de) |
ZA (1) | ZA937815B (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1187248A2 (de) * | 2000-08-29 | 2002-03-13 | Com Dev Ltd. | Seitengekoppeltes Mikrowellenfilter mit am Umfang beabstandeten Blenden |
TWI648904B (zh) * | 2017-07-31 | 2019-01-21 | 啓碁科技股份有限公司 | 帶通濾波裝置、信號傳送方法,以及室外單元 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113036364A (zh) * | 2019-12-25 | 2021-06-25 | 深圳市大富科技股份有限公司 | 一种滤波器及通信设备 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3936775A (en) * | 1974-09-30 | 1976-02-03 | Harvard Industries, Inc. | Multicavity dual mode filter |
EP0104735A2 (de) * | 1982-09-27 | 1984-04-04 | Space Systems / Loral, Inc. | Elektromagnetisches Filter mit mehreren Hohlraumresonatoren |
JPS6178202A (ja) * | 1984-09-25 | 1986-04-21 | Nippon Dengiyou Kosaku Kk | ノツチフイルタ |
WO1988010013A2 (en) * | 1987-06-08 | 1988-12-15 | Hughes Aircraft Company | Microwave multiplexer with multimode filter |
-
1992
- 1992-10-22 FR FR9212649A patent/FR2697372B1/fr not_active Expired - Fee Related
-
1993
- 1993-10-20 IL IL10733893A patent/IL107338A0/xx unknown
- 1993-10-20 EP EP93402574A patent/EP0594502A1/de not_active Withdrawn
- 1993-10-21 AU AU49167/93A patent/AU4916793A/en not_active Abandoned
- 1993-10-21 ZA ZA937815A patent/ZA937815B/xx unknown
- 1993-10-21 TW TW082108833A patent/TW238437B/zh active
- 1993-10-22 CA CA002108995A patent/CA2108995A1/fr not_active Abandoned
- 1993-10-23 TW TW082108838A patent/TW262442B/zh active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3936775A (en) * | 1974-09-30 | 1976-02-03 | Harvard Industries, Inc. | Multicavity dual mode filter |
EP0104735A2 (de) * | 1982-09-27 | 1984-04-04 | Space Systems / Loral, Inc. | Elektromagnetisches Filter mit mehreren Hohlraumresonatoren |
JPS6178202A (ja) * | 1984-09-25 | 1986-04-21 | Nippon Dengiyou Kosaku Kk | ノツチフイルタ |
WO1988010013A2 (en) * | 1987-06-08 | 1988-12-15 | Hughes Aircraft Company | Microwave multiplexer with multimode filter |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 10, no. 248 (E - 431)<2304> 26 August 1986 (1986-08-26) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1187248A2 (de) * | 2000-08-29 | 2002-03-13 | Com Dev Ltd. | Seitengekoppeltes Mikrowellenfilter mit am Umfang beabstandeten Blenden |
EP1187248A3 (de) * | 2000-08-29 | 2003-07-02 | Com Dev Ltd. | Seitengekoppeltes Mikrowellenfilter mit am Umfang beabstandeten Blenden |
TWI648904B (zh) * | 2017-07-31 | 2019-01-21 | 啓碁科技股份有限公司 | 帶通濾波裝置、信號傳送方法,以及室外單元 |
Also Published As
Publication number | Publication date |
---|---|
TW238437B (de) | 1995-01-11 |
TW262442B (de) | 1995-11-11 |
FR2697372A1 (fr) | 1994-04-29 |
ZA937815B (de) | 1994-05-19 |
AU4916793A (en) | 1994-05-05 |
IL107338A0 (en) | 1994-07-31 |
FR2697372B1 (fr) | 1994-12-09 |
CA2108995A1 (fr) | 1994-04-23 |
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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 ES FR GB GR IT NL SE |
|
17P | Request for examination filed |
Effective date: 19940823 |
|
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: 19960501 |