EP2025039A1 - Filtre a croix - Google Patents
Filtre a croixInfo
- Publication number
- EP2025039A1 EP2025039A1 EP07729806A EP07729806A EP2025039A1 EP 2025039 A1 EP2025039 A1 EP 2025039A1 EP 07729806 A EP07729806 A EP 07729806A EP 07729806 A EP07729806 A EP 07729806A EP 2025039 A1 EP2025039 A1 EP 2025039A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stub
- filter
- microwave
- axis
- stubs
- 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
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
- H01P1/209—Hollow waveguide filters comprising one or more branching arms or cavities wholly outside the main waveguide
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/12—Hollow waveguides
- H01P3/123—Hollow waveguides with a complex or stepped cross-section, e.g. ridged or grooved waveguides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49016—Antenna or wave energy "plumbing" making
Definitions
- the invention relates to a microwave waveguide and its method of production, as well as its application to a microwave filter and in particular a very high power microwave filter. It is more particularly applicable to filters comprising short-circuit transmission lines and adjustable lengths known as stubs in the art and used to produce impedances.
- the invention also relates to a microwave transmission / reception station using the microwave filter applicable in particular in the space domain.
- microwave filters are needed. This is the case, for example in the space domain where the transmission power must be particularly high and where the filters used must be effective at high power to have a maximum transmission power. This is the case, for example, in direct satellite transmission systems. The satellite must then be able to transmit at maximum power. But the invention is applicable in any other field where one must operate at high power.
- This multipactor effec is caused by a concentration of the electromagnetic field that pulls electrons on the walls of the guide. The electrons are then accelerated towards the opposite wall of the guide. The impact of these electrons on this wall in turn causes tearing of electrons and so on. There is thus an electron avalanche phenomenon which degrades the electrical performance of the guide and which can lead to a destruction of the guide.
- Multipactor power handling is the maximum power at which a component can be used without triggering the Multipactor effect.
- V mult i The multipactor threshold voltage (V mult i) is dependent on the type of hardware used for waveguide fabrication, but this voltage is always proportional to the product frequency - critical distance between plates (fxd).
- VMF Voltage Magnification Factor
- the object of the invention is to solve these problems and to provide a hyperfrequency guide and microwave filters in which the multipactor power handling has been significantly increased.
- the invention therefore relates to a method for producing a microwave waveguide comprising the following steps: a step of determining the critical zone (s) of the waveguide where a concentration of the electric field occurs, a step of producing a waveguide; at least one widening of the waveguide in the zone or zones thus determined.
- This method is applicable to the realization of a hypex frequency filter comprising short-circuit transmission lines and adjustable lengths, such as stubs.
- This method comprises: a step of determining, in the stubs, critical zones where electric field concentrations occur,
- each enlargement is located at a distance of ⁇ g / 4 from the short circuit zone of the stub, ⁇ g being a guided wavelength belonging to the range of operating wavelengths of the filter.
- the invention also relates to a hyperfrequency filter produced by this method.
- Each stub is in the form of a Latin cross in which the horizontal arms perpendicular to the axis of the stub correspond to said enlargements.
- the horizontal arms are of unequal lengths.
- at least one horizontal arm comprises sections of different dimensions. The section closest to the stub axis is larger than the section or sections farther from the axis of the sf ub.
- at least one horizontal arm has sections of different dimensions, the section closest to the axis of the stub is smaller than the more distant sections or the axis of the stub.
- each horizontal stackras is inclined relative to the axis of the stub.
- each horizontal arm has a curved shape.
- the invention is also applicable to a microwave transmission / reception station using the microwave filter thus described.
- This station then comprises:
- a first diplexer for horizontal polarization signals and comprising a first reception filter and a first transmission filter as described above,
- FIG. 1 A second diplexer for signals of vertical polarization and comprising a second reception filter and a second transmission filter as described above, a separator / combiner of polarization modes comprising a first access for the connected horizontal polarization signals; to the first diplexer, a second port for the vertical bias signals connected to the second diplexer, and a third port connected to a transmit / receive horn.
- FIGS. 1a a representation of a guide for explaining the object of the invent ion
- Figure Ib an embodiment of a guide according 1'inven tion
- Figure 2 an embodiment of a filter according to the invention
- Figure 3 a microwave filter with stubs with a low multipactor power carrying capacity and presenting a risk of triggering the multi-factor effect
- FIGS. 4a and 4b exemplary embodiments of a microwave filter comprising stubs according to the invention
- FIGS. 5a to 5e different embodiments of the stubs of a microwave filter
- FIGS. 6a to 6c and 7a to 7c alternative embodiments of stubs according to the invention
- DETAILED DESCRIPTION Figure la represents a waveguide g 1 allowing the propagation of a wave type rfr equence.
- changes in electromagnetic energy levels are detectable in the guide.
- FIG. 1a these variations of energy levels are illustrated. Concentrations of energy appear.
- a maximum cl can be at the origin of a multipactor effect as described above. We can then have a deterioration of the zone zi of the guide.
- the invention therefore provides for the identification and localization of zones, such as zl, in which there can be energy concentrations and to achieve enlargements of the guide in these zones.
- FIG. 1b thus represents an example of a guide according to the invention in which the walls of the guide g1 comprise a widening ell. This enlargement is carried out in such a way that the concentration of energy in zone z1 can not give rise to a multipactor effect.
- FIG. 2 shows a portion of a filter having impedance matching elements coupled in shunt on the main guide and terminating in short circuits. Such elements are referred to as stubs in the art and will therefore be referred to by this term in the following description. It is found that the stubs of the filters are the seat of concentrations of electromagnetic energy. To avoid the creation of multipactor effects in the stubs, expansion is therefore expected in the energy concentration zones.
- a stub such as st1, in FIG. 2, for a given wavelength ⁇ g, the maximum of concentrate; energy is produced at a distance ⁇ g / 4 from the short circuit side cc1 of the stub.
- the invention therefore provides enlargements el2 and el3 on the two guide walls of the stub.
- the stub is then in the form of a Latin cross whose horizontal arms are perpendicular to the X axis of the stub stl and which form the extensions el2 el3.
- FIG. 3 represents a filter of known type g3 having six stubs st2 to st7. A maximum of energy capable of creating a multipactor effect is found, in zone z3, in the stubs st4 and st5.
- the invention avoids this multipactor effect.
- the st4 and st5 tubs have enlargements e4 and e5 at the zone z3.
- the location of these enlargements has been made as previously described.
- the distance between stubs may not allow to predict these enlargements in a filter of the type of that of Figure 3. It is then expected to distribute the stubs on either side of the main axis of the filter .
- a configuration as shown in FIG. 4b is then obtained.
- this configuration provides for enlargements f2 to f7 on all the st'2 st '7 stubs.
- FIGS. 5b and 5c show sul stubs comprising enlargements eul and eu2 as described above.
- the eu2 enlargement is deeper than the eul enlargement and is provided for an initial energy concentration in the stub of Figure 5c greater than that of the stub of Figure 5b.
- the stub of Figure 5d has enlargements with different sections.
- a first enlargement eu3 is of relatively large size and this enlargement has a second enlargement eu '3 of smaller dimension.
- the enlargements are symmetrical with respect to the X axis of the stubs.
- Figure 6a shows a stub which has an enlargement which itself has an enlargement of larger size.
- the enlargements are symmetrical with respect to the X axis of the stub and the enlargement eu '5 is symmetrical with respect to the Y axis of the eu5 enlargement.
- FIG. 6b represents a stub of the same type as that of FIG. 6a but in which the enlargement eu '6 is not symmetrical with respect to the Y axis of eu6 enlargement.
- FIG. 6c shows a stub which has an enlargement on one side of the X axis of the stub and which has, on the other side of the X axis, an enlargement which itself has an enlargement 7 of larger size.
- the walls of the enlargements have curved surfaces as shown in FIG. 7b.
- the faces of the ends fall of the enlargements eu11 may be of curved shapes.
- the stubs as described in the invention have a volume greater than that without enlargement shown in Figure 5a. This increase in volume results in a significant reduction of ohmic losses.
- This invention can therefore be used to reduce the ohmic losses of a waveguide and especially in a filter.
- FIG. 8 will now be described an example of application of such a filter in a transmitting / receiving equipment embedded in a satellite. Such equipment must be able to transmit and receive signals at different energy levels. It must emit at a maximum energy level and receives relatively weak signals.
- the equipment of FIG. 8 comprises a single CO cone common to transmission and reception.
- DXH and DXV diplexer filters for the horizontal and vertical polarizations respectively are connected to the ports e1 and e2 of a separator eur / OMT polarization mode combiner which is connected via its access e3 to the CO transmit / receive horn.
- the reception filters FIRxH and FIRxV can be of relatively low operating powers.
- the emission filters FITxH and FITxV must be able to operate at high powers.
- the emission filters FITxH and FITxV are designed according to the invention to allow high powers. It is then possible to produce an equipment as shown in FIG. 8 with a single CO horn for transmission and reception.
- the invention therefore makes it possible to obtain in a guide and more particularly in a filter: a strong increase in power handling avoiding the effects of muitipactor, - a reduction in ohmic losses, a structure fully compatible with the manufacturing methods currently used for stub filters which guarantee Passive Intermodulation Products values.
- Tx transmit
- Rx Receive
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
- Waveguides (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0652011A FR2901918B1 (fr) | 2006-06-02 | 2006-06-02 | Filtre a croix |
| PCT/EP2007/055410 WO2007141213A1 (fr) | 2006-06-02 | 2007-06-01 | Filtre a croix |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2025039A1 true EP2025039A1 (fr) | 2009-02-18 |
| EP2025039B1 EP2025039B1 (fr) | 2010-09-01 |
Family
ID=37715195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07729806A Not-in-force EP2025039B1 (fr) | 2006-06-02 | 2007-06-01 | Filtre avec stubs à croix |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US8022788B2 (fr) |
| EP (1) | EP2025039B1 (fr) |
| JP (1) | JP5076223B2 (fr) |
| CN (1) | CN101485041B (fr) |
| AT (1) | ATE480019T1 (fr) |
| CA (1) | CA2654044C (fr) |
| DE (1) | DE602007008886D1 (fr) |
| ES (1) | ES2349165T3 (fr) |
| FR (1) | FR2901918B1 (fr) |
| WO (1) | WO2007141213A1 (fr) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5371384B2 (ja) * | 2008-11-11 | 2013-12-18 | 古野電気株式会社 | 導波管回路素子及び導波管構造 |
| ES2362761B1 (es) * | 2009-04-28 | 2012-05-23 | Ferox Comunications, S.L. | Multiplexor de polarización cruzada. |
| CN103311622B (zh) * | 2012-03-15 | 2015-04-22 | 成都赛纳赛德科技有限公司 | 吸收式谐波抑制滤波器 |
| KR101480862B1 (ko) | 2012-05-09 | 2015-01-13 | 국방과학연구소 | 병렬 공진기 |
| JP6262437B2 (ja) * | 2013-03-01 | 2018-01-17 | Necプラットフォームズ株式会社 | 有極型帯域通過フィルタ |
| ITMI20130710A1 (it) * | 2013-04-30 | 2014-10-31 | Consiglio Nazionale Ricerche | Filtro elettronico in guida d'onda con cavita' risonanti ad elevato accoppiamento. |
| WO2015185150A1 (fr) * | 2014-06-06 | 2015-12-10 | Telefonaktiebolaget L M Ericsson (Publ) | Combinaison de deux liaisons radio à deux porteuses |
| CN104548621B (zh) * | 2015-01-07 | 2016-09-07 | 青岛荣天国际贸易有限公司 | 一种旋转拆装式十字架 |
| US10326189B2 (en) * | 2017-04-25 | 2019-06-18 | Google Llc | Ortho-mode transducer and diplexer |
| US10811752B2 (en) | 2019-03-15 | 2020-10-20 | Thinkom Solutions, Inc. | Offset block waveguide coupler |
| EP4258466A4 (fr) * | 2020-12-02 | 2024-10-30 | Inter-University Research Institute Corporation National Institutes of Natural Sciences | Filtre d'absorption |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2531447A (en) * | 1947-12-05 | 1950-11-28 | Bell Telephone Labor Inc | Hybrid channel-branching microwave filter |
| US2633492A (en) * | 1948-12-30 | 1953-03-31 | Bell Telephone Labor Inc | Guided wave frequency range, frequency selective and equalizing structure |
| NL213139A (fr) * | 1956-01-30 | |||
| US3058072A (en) * | 1956-11-15 | 1962-10-09 | Raytheon Co | Microwave filters |
| DE1766579A1 (de) * | 1968-06-14 | 1971-08-05 | Philips Patentverwaltung | Hohlleiter-Leitungstransformatorenanordnung |
| JPS6310802A (ja) * | 1986-07-01 | 1988-01-18 | Mitsubishi Electric Corp | 分岐導波管形帯域阻止ろ波器 |
| US4862186A (en) * | 1986-11-12 | 1989-08-29 | Hughes Aircraft Company | Microwave antenna array waveguide assembly |
| US5051713A (en) * | 1988-12-30 | 1991-09-24 | Transco Products, Inc. | Waveguide filter with coupled resonators switchably coupled thereto |
| CA2066887C (fr) * | 1991-05-06 | 1996-04-09 | Harry Wong | Repartiteur de puissance rf a cavite a plat |
| JP2555925B2 (ja) * | 1993-04-19 | 1996-11-20 | 日本電気株式会社 | 回転型導波管結合器およびアンテナ給電装置 |
| JP4201742B2 (ja) * | 2004-06-21 | 2008-12-24 | シャープ株式会社 | マイクロ波受信用コンバータ |
| JP4179271B2 (ja) * | 2004-12-01 | 2008-11-12 | 三菱電機株式会社 | スタブ付きフィルタ及び、ダイプレクサ |
-
2006
- 2006-06-02 FR FR0652011A patent/FR2901918B1/fr not_active Expired - Fee Related
-
2007
- 2007-06-01 AT AT07729806T patent/ATE480019T1/de not_active IP Right Cessation
- 2007-06-01 JP JP2009512615A patent/JP5076223B2/ja not_active Expired - Fee Related
- 2007-06-01 EP EP07729806A patent/EP2025039B1/fr not_active Not-in-force
- 2007-06-01 US US12/303,049 patent/US8022788B2/en not_active Expired - Fee Related
- 2007-06-01 WO PCT/EP2007/055410 patent/WO2007141213A1/fr not_active Ceased
- 2007-06-01 CN CN2007800251671A patent/CN101485041B/zh not_active Expired - Fee Related
- 2007-06-01 DE DE602007008886T patent/DE602007008886D1/de active Active
- 2007-06-01 CA CA2654044A patent/CA2654044C/fr not_active Expired - Fee Related
- 2007-06-01 ES ES07729806T patent/ES2349165T3/es active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007141213A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007141213A1 (fr) | 2007-12-13 |
| JP2009539291A (ja) | 2009-11-12 |
| US8022788B2 (en) | 2011-09-20 |
| CA2654044C (fr) | 2014-12-09 |
| FR2901918B1 (fr) | 2008-12-05 |
| ES2349165T3 (es) | 2010-12-28 |
| CN101485041B (zh) | 2012-08-08 |
| JP5076223B2 (ja) | 2012-11-21 |
| US20090237184A1 (en) | 2009-09-24 |
| DE602007008886D1 (de) | 2010-10-14 |
| CN101485041A (zh) | 2009-07-15 |
| ATE480019T1 (de) | 2010-09-15 |
| EP2025039B1 (fr) | 2010-09-01 |
| CA2654044A1 (fr) | 2007-12-13 |
| FR2901918A1 (fr) | 2007-12-07 |
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