EP0594502A1 - Filtre agile passe-bande hyperfréquences à cavités bi-modes - Google Patents

Filtre agile passe-bande hyperfréquences à cavités bi-modes Download PDF

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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Withdrawn
Application number
EP93402574A
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German (de)
English (en)
French (fr)
Inventor
Patrick Baclaine
Jean-Louis Lambert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel CIT SA
Original Assignee
Alcatel Telspace SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alcatel Telspace SA filed Critical Alcatel Telspace SA
Publication of EP0594502A1 publication Critical patent/EP0594502A1/fr
Withdrawn legal-status Critical Current

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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.

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EP93402574A 1992-10-22 1993-10-20 Filtre agile passe-bande hyperfréquences à cavités bi-modes Withdrawn EP0594502A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9212649A FR2697372B1 (fr) 1992-10-22 1992-10-22 Filtre agile passe-bande hyperfréquences à cavités bi-modes.
FR9212649 1992-10-22

Publications (1)

Publication Number Publication Date
EP0594502A1 true EP0594502A1 (fr) 1994-04-27

Family

ID=9434783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93402574A Withdrawn EP0594502A1 (fr) 1992-10-22 1993-10-20 Filtre agile passe-bande hyperfréquences à cavités bi-modes

Country Status (7)

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EP (1) EP0594502A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU4916793A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA2108995A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2697372B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IL (1) IL107338A0 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
TW (2) TW238437B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ZA (1) ZA937815B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1187248A3 (en) * 2000-08-29 2003-07-02 Com Dev Ltd. A side-coupled microwave filter with circumferentially-spaced irises
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936775A (en) * 1974-09-30 1976-02-03 Harvard Industries, Inc. Multicavity dual mode filter
EP0104735A2 (en) * 1982-09-27 1984-04-04 Space Systems / Loral, Inc. Electromagnetic filter with multiple resonant cavities
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936775A (en) * 1974-09-30 1976-02-03 Harvard Industries, Inc. Multicavity dual mode filter
EP0104735A2 (en) * 1982-09-27 1984-04-04 Space Systems / Loral, Inc. Electromagnetic filter with multiple resonant cavities
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)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 248 (E - 431)<2304> 26 August 1986 (1986-08-26) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1187248A3 (en) * 2000-08-29 2003-07-02 Com Dev Ltd. A side-coupled microwave filter with circumferentially-spaced irises
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 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1995-01-11
ZA937815B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1994-05-19
FR2697372B1 (fr) 1994-12-09
FR2697372A1 (fr) 1994-04-29
IL107338A0 (en) 1994-07-31
AU4916793A (en) 1994-05-05
TW262442B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1995-11-11
CA2108995A1 (fr) 1994-04-23

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