EP0802576B1 - Kupplung für zwei elektromagnetische Hohlleiter mit unterschiedlichen Querschnittsformen - Google Patents
Kupplung für zwei elektromagnetische Hohlleiter mit unterschiedlichen Querschnittsformen Download PDFInfo
- Publication number
- EP0802576B1 EP0802576B1 EP97400752A EP97400752A EP0802576B1 EP 0802576 B1 EP0802576 B1 EP 0802576B1 EP 97400752 A EP97400752 A EP 97400752A EP 97400752 A EP97400752 A EP 97400752A EP 0802576 B1 EP0802576 B1 EP 0802576B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coupling
- wave
- steps
- wave types
- types
- 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.)
- Expired - Lifetime
Links
- 230000008878 coupling Effects 0.000 title claims description 40
- 238000010168 coupling process Methods 0.000 title claims description 40
- 238000005859 coupling reaction Methods 0.000 title claims description 40
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000004323 axial length Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 238000003892 spreading Methods 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/082—Transitions between hollow waveguides of different shape, e.g. between a rectangular and a circular waveguide
Definitions
- the invention relates to a clutch for two electromagnetic waveguide with different Cross-sectional shapes one behind the other in the axial direction arranged steps with a substantially rectangular Cross section and rounded corners as well as different has clear width in which a low reflection Transmission of the wave types intended for signal routing takes place (EP 0 145 292 A2).
- Such a clutch also known as a "transition”
- has the Task the signal-carrying wave type (mode) of a Waveguide reflection-free in the intended for signal routing
- mode the signal-carrying wave type
- the Cross sections of the two waveguides are fundamental any. For example, you can use elliptical, rectangular, be square or round.
- a graduated clutch according to the one mentioned EP 0 145 292 A2 is shorter.
- the use of this well-known Coupling with sudden change in cross-sectional geometry is expressly limited to frequency ranges in which both in the two waveguides to be connected and in the clutch itself only the corresponding fundamental wave may be spreadable.
- the cross sections of each Levels of the clutch are chosen so that others Wave types are not capable of spreading.
- This well-known Coupling is therefore limited to single-mode operation. She serves exclusively for the transmission of the respective Basic modes of the waveguide to be connected. It will also provided that the individual stages are from one end the coupling to the other widen or narrow in the same direction, so that the cut-off frequency of the basic mode within the Clutch changes monotonously.
- the clutch is only for the connection of a rectangular with an elliptical Waveguide provided.
- the invention is based on the object at the outset further described device so that it at simple setup with no restrictions on the connection any waveguide and for any signal-carrying Wave types can be used.
- “Expandable” in the sense of the invention means that due to the dimensioning of the coupling basically all possible wave types could or may spread. There are in contrast to the known clutch described above no measures were taken to expand it to prevent any wave types.
- the coupling used in this device is simple constructed and easy to manufacture. It can be made from one part are manufactured in which the individual stages, for example be milled. The diameter of the milling cutter appropriately and consciously chosen so that the radii of the rounded corners when dimensioning the steps with are taken into account.
- the coupling is suitable with waveguides very different cross sections with minimal Connect loss of performance with each other. It is not one certain cross-sectional shape of the waveguide to be connected limited.
- the wave types provided for signal routing in the waveguides to be connected can both from Be basic wave type as well as a higher wave type correspond. There is also the possibility that in one Waveguide of the basic wave type and in the other waveguide a higher wave type is used for signal routing.
- the Coupling ensures the transformation of the shaft types in two directions of transmission.
- the coupling can also be used in particular for waveguides in which several modes are spreadable. So can the coupling is advantageous for connecting waveguides are used in so-called overmoded and thus very low-loss frequency ranges are used.
- the Coupling also allows the connection of a single-mode Frequency range operated and therefore comparatively small waveguide with an overmoded waveguide, at which several modes are capable of spreading and therefore one has a comparatively large cross-section.
- the coupling can also be used to selectively excite several Wave types are used to overlay them for example to feed antennas that are special Directional characteristics should have.
- Fig. 1 in a schematic representation of a connection point between two waveguides with a coupling after Invention.
- Fig. 2 shows a cross section through the clutch in enlarged Presentation.
- Fig. 6 is a diagram for the reflection factor over the Frequency.
- Two electromagnetic waveguides 1 and 2 are through one Coupling 3 connected to each other with little reflection.
- the waveguide 1 and 2 have very different dimensions.
- the Waveguide 1 has, for example, a rectangular one Cross section, while the waveguide 2 for example is elliptical, with a much larger clearance Cross-sectional area as the waveguide 1.
- the coupling 3 has three stages in its clear cross section S1, S2 and S3 on.
- the clear dimensions of levels S1 to S3 can according to FIG. 3 from one end of the clutch 3 to change their other end in the same direction so that at one end the smaller waveguide 1 and at the other end the larger one Waveguide 2 can be connected with low reflection.
- the Steps S1 to S3 can also overlap each other according to FIG. 4.
- the sudden change given by levels S1 to S3 the cutoff frequency of the signal routing Wave types can then fall from one end of the coupling and rise again or vice versa. Whether there is such Overlap depends on the operating frequency range and the respective cross-sectional shape and size of the to be connected Waveguide and is used in the respective application decided.
- connection is closed connecting waveguide clearly and must not be interchanged because the coupling is asymmetrical in the axial direction.
- the axes of the individual stages S1 to S3 can be shown in FIG. 5 also be offset from one another by a distance V, namely in both the horizontal and vertical directions.
- the clutch 3 is made in one piece. It is over flanges 4 and 5 can be connected to the waveguides 1 and 2.
- Levels S1 to S3 can be produced using a milling cutter, for example become. Each of the levels S1 to S3 then has an i. w. rectangular clear cross section with rounded corners. The The radius of the corners depends on the diameter of the milling cutter used certainly. It is only limited by the height and width of the individual stages.
- the establishment of basic mechanical properties of the Coupling 3 can be transmitted Frequency range and the required adjustment of the signal-carrying shaft types based on empirical values become. This relates i. w. on the number of required levels of clutch 3, the choice of each Fillets and the possibility of individual overlaps Steps of clutch 3 or the outer steps of clutch 3 with the connected waveguides 1 and 2.
- the number of required stages of clutch 3 depends mainly according to the cross sections of the to be connected Waveguide, according to the required frequency bandwidth and the electromagnetic requirements within the selected Frequency range. This relates, for example, to the Reflection and transmission factor of the signal-carrying Wave types.
- a coupling was produced between a rectangular waveguide with a cross section of 10.67 mm x 4.32 mm and an elliptical waveguide, the main axes of which were dimensioned at 25.0 mm and 15.3 mm.
- the cross-sectional area of the rectangular waveguide is 6.5 times smaller than that of the elliptical waveguide.
- the clutch has three stages, which are arranged axially symmetrical to each other.
- the task of the coupling is the low-reflection adaptation of the basic modes H 10 of the rectangular waveguide and H cell of the elliptical waveguide in the frequency range 17.7 GHz to 19.7 GHz.
- 4 shows the measured (solid line) and the calculated (dashed line) reflection factor in the frequency range from 17.0 to 20.0 GHz.
- the reflection factor is ⁇ -34dB.
Landscapes
- Waveguides (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
- daß die Abmessungen aller Stufen gezielt so bemessen sind, daß jeweils neben dem Grundwellentyp auch andere Wellentypen an sich ausbreitungsfähig sind und
- daß aufgrund dieser Abmessungen der Kupplung sich nur die zur Signalführung bestimmten Wellentypen in den angeschlossenen Hohlleitern ausbreiten, während die nicht zur Signalführung vorgesehenen Wellentypen sich durch Überlagerung im wesentlichen auslöschen.
Claims (7)
- Kupplung für zwei elektromagnetische Hohlleiter mit unterschiedlichen Querschnittsformen, die in axialer Richtung hintereinander angeordnete Stufen mit im wesentlichen rechteckigem Querschnitt und abgerundeten Ecken sowie unterschiedlicher lichter Weite aufweist, in welcher eine reflexionsarme Transmission der zur Signalführung bestimmten Wellentypen erfolgt, dadurch gekennzeichnet,daß die Abmessungen aller Stufen (S1-S3) gezielt so bemessen sind, daß jeweils neben dem Grundwellentyp auch andere Wellentypen an sich ausbreitungsfähig sind unddaß aufgrund dieser Abmessungen der Kupplung (3) sich nur die zur Signalführung bestimmten Wellentypen in den angeschlossenen Hohlleitern ausbreiten, während die nicht zur Signalführung vorgesehenen Wellentypen sich durch Überlagerung im wesentlichen auslöschen.
- Kupplung nach Anspruch 1, dadurch gekennzeichnet, daß die einzelnen Stufen (S1-S3) einander überlappen.
- Verfahren zur Herstellung einer Kupplung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß alle Stufen (S1-S3) in Abhängigkeit vom zu übertragenden Frequenzband und von dem jeweils gewünschten Wellentyp mit der Höhe (H) und der Breite (B) des lichten Querschnitts sowie der axialen Länge (L) und dem Radius (R) der abgerundeten Ecken sowie dem möglichen Versatz (V) ihrer Achsen gegeneinander als Parameter bemessen werden.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die unterschiedlichen Stufen (S1-S3) der Kupplung (3) durch Einsatz eines Fräsers erzeugt werden.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Kupplung (3) in Gußtechnik hergestellt wird.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Kupplung (3) durch galvanische Abscheidung hergestellt wird.
- Verfahren nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß durch die Bemessung der Stufen (S1-S3) der Kupplung (3) die zur Signalführung vorgesehenen Wellentypen einander im gewünschten Sinne in Phasenlage und Amplitude überlagern.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19615854A DE19615854C1 (de) | 1996-04-20 | 1996-04-20 | Verfahren zur Herstellung einer Kupplung für das Verbinden zweier elektromagnetischer Hohlleiter |
DE19615854 | 1996-04-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0802576A1 EP0802576A1 (de) | 1997-10-22 |
EP0802576B1 true EP0802576B1 (de) | 2001-08-01 |
Family
ID=7791991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97400752A Expired - Lifetime EP0802576B1 (de) | 1996-04-20 | 1997-04-01 | Kupplung für zwei elektromagnetische Hohlleiter mit unterschiedlichen Querschnittsformen |
Country Status (5)
Country | Link |
---|---|
US (1) | US5886588A (de) |
EP (1) | EP0802576B1 (de) |
AU (1) | AU708582B2 (de) |
BR (1) | BR9701847A (de) |
DE (2) | DE19615854C1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1233469A3 (de) * | 2001-01-26 | 2003-07-30 | Spinner GmbH Elektrotechnische Fabrik | Hohlleiterarmatur |
US6583693B2 (en) | 2001-08-07 | 2003-06-24 | Andrew Corporation | Method of and apparatus for connecting waveguides |
US7068121B2 (en) * | 2003-06-30 | 2006-06-27 | Tyco Technology Resources | Apparatus for signal transitioning from a device to a waveguide |
US7893789B2 (en) * | 2006-12-12 | 2011-02-22 | Andrew Llc | Waveguide transitions and method of forming components |
DE102009026433A1 (de) | 2009-05-25 | 2010-12-09 | Endress + Hauser Gmbh + Co. Kg | Anordnung zur Füllstandsmessung mit einem mit Mikrowellen arbeitenden Füllstandsmessgerät |
US8816791B2 (en) | 2010-09-28 | 2014-08-26 | Aviat U.S., Inc. | Systems and methods of a rectangular-to-circular waveguide transition |
JP6526509B2 (ja) * | 2015-07-23 | 2019-06-05 | 株式会社東芝 | 導波管ベンドおよび無線機器 |
CN115441141B (zh) * | 2022-10-17 | 2023-04-25 | 北京星英联微波科技有限责任公司 | 阶梯扭波导 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB591667A (en) * | 1942-03-31 | 1947-08-25 | Sperry Gyroscope Co Inc | Improvements in or relating to impedance transformers for wave guides |
BE552817A (de) * | 1956-01-26 | |||
GB850992A (en) * | 1958-09-11 | 1960-10-12 | Standard Telephones Cables Ltd | Electrical h.f. waveguide junction between cylindrical guides of unlike diameters |
US3019399A (en) * | 1959-03-06 | 1962-01-30 | Microwave Ass | Circular waveguide diameter transformer |
GB842344A (en) * | 1959-03-12 | 1960-07-27 | Standard Telephones Cables Ltd | Electrical waveguide junction arrangement |
US3336543A (en) * | 1965-06-07 | 1967-08-15 | Andrew Corp | Elliptical waveguide connector |
DE1948157C3 (de) * | 1969-09-23 | 1978-03-09 | Spinner-Gmbh Elektrotechnische Fabrik, 8000 Muenchen | Übergangstransformationsteil für Hohlleiter |
US3818383A (en) * | 1973-02-27 | 1974-06-18 | Andrew Corp | Elliptical-to-rectangular waveguide transition |
JPS55101380A (en) * | 1979-01-20 | 1980-08-02 | Matsushita Electric Ind Co Ltd | Driver for automatically clamping screw |
US4540959A (en) * | 1983-11-22 | 1985-09-10 | Andrew Corporation | Rectangular to elliptical waveguide connection |
US4642585A (en) * | 1985-01-30 | 1987-02-10 | Andrew Corporation | Superelliptical waveguide connection |
US4906951A (en) * | 1989-02-15 | 1990-03-06 | United States Department Of Energy | Birefringent corrugated waveguide |
-
1996
- 1996-04-20 DE DE19615854A patent/DE19615854C1/de not_active Expired - Fee Related
-
1997
- 1997-04-01 EP EP97400752A patent/EP0802576B1/de not_active Expired - Lifetime
- 1997-04-01 DE DE59704165T patent/DE59704165D1/de not_active Expired - Lifetime
- 1997-04-17 US US08/840,888 patent/US5886588A/en not_active Expired - Lifetime
- 1997-04-18 AU AU18961/97A patent/AU708582B2/en not_active Ceased
- 1997-04-18 BR BR9701847A patent/BR9701847A/pt active Search and Examination
Also Published As
Publication number | Publication date |
---|---|
DE19615854C1 (de) | 1997-11-20 |
EP0802576A1 (de) | 1997-10-22 |
BR9701847A (pt) | 1998-09-08 |
AU1896197A (en) | 1997-10-30 |
AU708582B2 (en) | 1999-08-05 |
DE59704165D1 (de) | 2001-09-06 |
US5886588A (en) | 1999-03-23 |
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