WO2005060042A1 - Einkopplung - Google Patents
Einkopplung Download PDFInfo
- Publication number
- WO2005060042A1 WO2005060042A1 PCT/EP2004/053461 EP2004053461W WO2005060042A1 WO 2005060042 A1 WO2005060042 A1 WO 2005060042A1 EP 2004053461 W EP2004053461 W EP 2004053461W WO 2005060042 A1 WO2005060042 A1 WO 2005060042A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- waveguide
- coaxial cable
- arrangement
- inner conductor
- rear wall
- Prior art date
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 22
- 238000010168 coupling process Methods 0.000 title claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 22
- 239000004020 conductor Substances 0.000 claims abstract description 19
- 239000003989 dielectric material Substances 0.000 claims description 6
- 229920005548 perfluoropolymer Polymers 0.000 claims description 3
- 230000005284 excitation Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
- H01P5/103—Hollow-waveguide/coaxial-line transitions
Definitions
- the invention relates to a coupling, in particular a transition from a coaxial line into a waveguide filled with air or with a dielectric.
- Couplings of this type are known and are used, for example, in devices in which a high-frequency electromagnetic signal generated in a corresponding electronic circuit is passed from the electronic circuit to a waveguide or waveguide via a coaxial cable.
- a plug connection is often provided in or on the waveguide.
- An inner conductor of the coaxial cable is continued in the interior of the waveguide as an excitation pin.
- the TEM mode existing in the coaxial cable is converted into the basic mode TE 11 of the waveguide.
- Couplings or arrangements of this type for coupling electromagnetic signals from a coaxial line into a waveguide are used in devices for the propagation and reception of electromagnetic signals, such as in radio technology systems, in distance measuring devices that work according to the transit time method, and in particular in level measuring devices according to the transit time principle for industrial measurement technology.
- the waveguide is coupled from the side, the inner conductor of the coaxial line serving as a pin-shaped or mushroom-shaped excitation pin to excite the TE mode in the waveguide.
- the lateral coupling requires an external plug connection and therefore a large amount of space. It is also unfavorable in terms of assembly.
- the lateral coupling is also unsuitable for direct coupling without an HF cable.
- the invention is therefore based on the object of specifying an arrangement for coupling which avoids the disadvantages described above, which is particularly space-saving, simple and robust to manufacture and which allows simple RF adaptation and which is suitable for broadband applications.
- This object is achieved according to the invention by an arrangement for coupling electromagnetic signals from a coaxial line into a waveguide, an inner conductor of the coaxial cable opening into a rear wall of the waveguide, the inner conductor being continued as excitation in the waveguide, and one of the Back wall of the waveguide tip of the excitation pin is electrically conductively connected to a side wall of the waveguide.
- the waveguide has a cylindrical bore.
- a waveguide with a conical bore is provided.
- the inner conductor of the coaxial cable opens eccentrically into the rear wall of the waveguide.
- the bore of the waveguide is filled with a dielectric material, preferably a perfluoroplastic.
- Fig. 2 shows an embodiment of an arrangement for
- FIG. 3 shows the arrangement according to FIG. 2 in a perspective view Representation of a cut waveguide in
- FIG. 4 shows the arrangement according to FIG. 3 in a perspective
- FIG. 1 is used to provide a general explanation of the arrangement 10 and the processes involved in coupling high-frequency electromagnetic signals from a coaxial cable 12 into a waveguide 14, for example a circular waveguide.
- An inner conductor 16 of the coaxial cable 12 opens into a rear wall 18 of the waveguide 14.
- the inner conductor 16 is continued as Errege ⁇ in 20 in the waveguide 14, and a tip 22 of the Errege ⁇ ins 20 facing away from the rear wall 18 of the waveguide is electrically conductive with a side wall 24 of the waveguide 14 connected. As is known, it is about converting the TEM wave existing in the coaxial cable 12 into a TE wave.
- the waveguide 14 must be dimensioned in such a way that no higher modes can be propagated apart from TEM and TE, since they represent the lowest existing solutions of the MAXWELL equation.
- the disturbed rotational symmetry of the field distribution of the TEM waves leads to an asymmetrical field distribution of TE waves. Reflections at defects have to be destructively interfered with.
- the geometry of the arrangement 10 must be optimized so that the two reflected TEM waves (see diagram in the upper part of FIG. 1) interfere destructively, i.e. with a phase shift of ⁇ , and the transmitted TE waves interfere constructively, i.e. with a phase shift of 2 ⁇ .
- the invention solves this problem by making the transition of the Errege ⁇ ins 20 to the side wall 24 softer than shown in Fig. 1. 2 shows an arrangement 10 designed in this way according to the invention, the illustration of the coaxial cable (see FIG. 1) being dispensed with.
- the inner conductor 16 of the coaxial cable is expediently guided in a glass bushing 28 in the rear wall 18 of the waveguide.
- the waveguide 14, for example a round waveguide is preferably filled with a dielectric material, preferably with a material made of perfluoroplastic, for example a polytetrafluoroethylene or perfluoroakoxy copolymer.
- the Errege ⁇ in 20 is designed as a straight pin and extends in the interior of the waveguide at an angle inclined to the side wall 24.
- the waveguide 14 fills it Cylinder 26 made of dielectric material milled a corresponding groove, so that the cylinder 26 can be inserted into the waveguide 14 with pre-assembled Errege ⁇ in 20. It makes sense to pay a lot of attention to contacting the Errege ⁇ ins 20, since it must be carried out very carefully. Both at the contacting of the Errege ⁇ ins 20 on the conductor 16 of the glass bushing 28 and on the side wall 24 of the waveguide 14, a strong line current flows on the surface.
- FIG. 3 and 4 show the arrangement 10 according to the invention according to FIG. 2 in perspective representations.
- the waveguide 14, its rear wall 18, the Errege ⁇ in 20 and the glass bushing 28 can be clearly seen.
- a sectional illustration was chosen for FIG. 3, the cylinder 26 (see FIG. 2) made of dielectric material not being shown here.
- Fig. 4 shows the arrangement 10 in a view from the front, quasi into the waveguide 14.
- FIGS. 2, 3 and 4 clearly show that the glass bushing 28 for the inner conductor 16 of the coaxial cable is arranged eccentrically in the rear wall 18 of the waveguide 14. Accordingly, the Errege ⁇ in 20 in the interior of the waveguide 14 is applied eccentrically to the rear wall 18.
- waveguides with a conical bore can also be used.
Landscapes
- Waveguide Aerials (AREA)
- Waveguides (AREA)
- Communication Cables (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/583,507 US20080003872A1 (en) | 2003-12-18 | 2004-12-14 | Coupling |
EP04804819A EP1695412A1 (de) | 2003-12-18 | 2004-12-14 | Einkopplung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10359867A DE10359867A1 (de) | 2003-12-18 | 2003-12-18 | Einkopplung |
DE10359867.7 | 2003-12-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005060042A1 true WO2005060042A1 (de) | 2005-06-30 |
Family
ID=34672941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/053461 WO2005060042A1 (de) | 2003-12-18 | 2004-12-14 | Einkopplung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080003872A1 (de) |
EP (1) | EP1695412A1 (de) |
CN (1) | CN1902780A (de) |
DE (1) | DE10359867A1 (de) |
WO (1) | WO2005060042A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7283086B2 (en) * | 2004-05-13 | 2007-10-16 | Endress + Hauser Gmbh + Co. K.G. | Fill level measuring device working with microwaves |
WO2008101530A1 (de) * | 2007-02-24 | 2008-08-28 | Festo Ag & Co. Kg | Aktor mit positionsmessvorrichtung |
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US7668522B2 (en) * | 2006-06-29 | 2010-02-23 | Itt Manufacturing Enterprises, Inc. | Ultra wide band, differential input/output, high frequency active combiner in an integrated circuit |
DE102006062223A1 (de) * | 2006-12-22 | 2008-06-26 | Endress + Hauser Gmbh + Co. Kg | Füllstandsmessgerät zur Ermittlung und Überwachung eines Füllstandes eines im Prozessraum eines Behälters befindlichen Mediums |
TR201911076T4 (tr) | 2011-01-05 | 2019-08-21 | Prenatal Int Gmbh | Klorür içeriği azaltılmış fosfolipit içeren veya içermeyen hipotonik sulu bileşim. |
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Also Published As
Publication number | Publication date |
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DE10359867A1 (de) | 2005-07-14 |
EP1695412A1 (de) | 2006-08-30 |
US20080003872A1 (en) | 2008-01-03 |
CN1902780A (zh) | 2007-01-24 |
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