EP1998402A1 - Système d'alimentation en particulier destiné à la réception de programmes radio et/ou télévisés émis par satellite - Google Patents

Système d'alimentation en particulier destiné à la réception de programmes radio et/ou télévisés émis par satellite Download PDF

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Publication number
EP1998402A1
EP1998402A1 EP08008694A EP08008694A EP1998402A1 EP 1998402 A1 EP1998402 A1 EP 1998402A1 EP 08008694 A EP08008694 A EP 08008694A EP 08008694 A EP08008694 A EP 08008694A EP 1998402 A1 EP1998402 A1 EP 1998402A1
Authority
EP
European Patent Office
Prior art keywords
waveguide
housing
circuit board
printed circuit
auskoppelstifte
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
Application number
EP08008694A
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German (de)
English (en)
Other versions
EP1998402B1 (fr
Inventor
Peter Praßmaier
Wolfgang Mummert
Sebastian Orthofer
Wolfgang Anderl
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.)
Kathrein SE
Original Assignee
Kathrein Werke KG
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Publication date
Application filed by Kathrein Werke KG filed Critical Kathrein Werke KG
Publication of EP1998402A1 publication Critical patent/EP1998402A1/fr
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Publication of EP1998402B1 publication Critical patent/EP1998402B1/fr
Active legal-status Critical Current
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • H01P1/161—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer

Definitions

  • the invention relates to a feed system according to the preamble of claim 1.
  • Feed systems are commonly used to receive televisions and radio programs broadcast via geostationary-positioned satellites. In this case, analog or digitally broadcast programs can be received in such feed systems.
  • Such feed systems include a so-called OMT, so called a so-called orthomode transducer (called in German Orthormenkoppler or polarization switch), the receiving side a horn, for example, a so-called grooved horn, which is usually at least slightly conical and compared to its opening area in a round in cross-section or, for example, square waveguide passes.
  • OMT so-called a so-called orthomode transducer
  • horn for example, a so-called grooved horn, which is usually at least slightly conical and compared to its opening area in a round in cross-section or, for example, square waveguide passes.
  • Coupling pins are provided in the waveguide, namely a first coupling pin for receiving an electromagnetic wave radiated in a first plane of polarization and a further, offset thereto lying second coupling pin for receiving an electromagnetic wave which propagates in a plane perpendicular to the first plane of polarization second polarization plane.
  • the electromagnetic wave of the first and second polarization plane can be coupled and fed to a downstream converter (LNB), in which a corresponding processing for frequency conversion of the satellite received signals.
  • the LNB again comprises a separate housing, ie a housing which is separate from the feed system and which is mounted laterally or transversely to the waveguide of the OMT.
  • Corresponding constructions are for example from EP 0 611 488 or the EP 0 815 611 B1 known.
  • Vorveröttingungen coupling pins are arranged parallel to each other. Between you is a lying in the same plane of the coupling pins reflector pin provided. At the end of the short-circuited waveguide, a phase rotator is provided which rotates and reflects a plane of polarization left through 90 °, which is why the closer to the waveguide end coupling pin can be arranged lying in the same plane as the remote coupling pin for receiving the first polarization plane.
  • the board of the converter which is housed in a box-shaped housing, be laterally arranged on the waveguide of the OMT, so that the coupling pins perpendicular to the Porterplatinenebene project through the housing of the LNB and through corresponding openings in the waveguide protrude from the OMT. Therefore, the corresponding construction of the lateral attachment, so the eccentric attachment of the LNB's side to the median plane of the waveguide is due.
  • the waveguide attached laterally to the housing of the LNB is integrally formed with the corresponding housing plate of the LNB.
  • the unitary housing construction basically has the same construction, such that the waveguide of the OMT is offset laterally relative to the housing receptacle connected in one piece therewith.
  • twin horn which is constructed so that the distance between the central axes of the two waveguides are less than 55 mm to each other.
  • this requires special designs, especially a special tool, if such a twin horn is to be produced as a casting.
  • a multi antenna with several parallel arranged horn constructions and waveguides is also from the DE 20 2005 012 610 known.
  • this prior publication describes only a very specific arrangement with very specific lateral center distances between the individual OMT's, which are only suitable for a specific multifeed reception for certain satellites geo-stationary positioned orbit.
  • the predetermined axial distance is only optimal with respect to a particular position on the earth, at another point nearer or farther away from the equator, the construction given here due to the lack of adaptation of the side distance of the individual waveguide leads to a deterioration of the received signal.
  • a feed system with an associated horn, in particular grooved horn, and an OMT is proposed, which builds considerably narrower compared to conventional devices with very good reception performance.
  • the overall width of the device housing, including the horn and the housing of the LNB's may have a width, for example, is less than 45 mm. This makes this feed system suitable for multifeed, for example for receiving programs transmitted via the Astra satellite (19.2 ° East) and the Hotbird satellite (13 ° East), using a mirror diameter (parabolic antenna) of only 60 cm.
  • the housing of the converter including the housing of the horn and the waveguide as a common casting produced.
  • a structure can be realized, which allows a necessary demoulding. Only a separate housing cover is necessary to close the converter housing.
  • This housing cover can be made as a casting or as a separate sheet metal part or in another suitable manner.
  • two signal output pins can be designed as PCB pins. That is, in the waveguide tube of the waveguide only two openings are provided which form a connection to the housing interior of the LNB with the printed circuit board provided there, the at least two Signalauskoppelite, preferably in the form of two Porterplatinenzapfen project through this opening into the interior of the waveguide.
  • the two mutually parallel Auskoppel reconstructe are arranged transversely and in particular perpendicular to the printed circuit board, that can be guided laterally through corresponding openings in the waveguide.
  • the two Auskoppel reconstructe are aligned perpendicular to each other, while for example at least one of Auskoppelmase is designed as an angle pin, so that the actual, projecting into the waveguide Auskoppelabterrorism is perpendicular to the other leg of the angularly shaped coupling pin What this angle-shaped decoupling pin is then ultimately held on the circuit board.
  • corresponding recesses in the wall of the waveguide can be introduced so that the printed circuit board is positioned in a tight position for this purpose can be so that the housing of the waveguide and the converter are arranged as symmetrical and central to each other, so if possible with no or only slightest lateral offset to allow a total of narrow housing construction.
  • FIG. 1 is a first embodiment of the invention for a feed system 1 for receiving television and / or Radio programs broadcast over a geostationary satellite.
  • the feed system 1 has an overall housing 3, which consists at least predominantly of a cast part.
  • the feed system 1 comprises a horn 5, which merges via a funnel-shaped tapering section into a waveguide 7, which is closed at one end opposite the horn 5 with a waveguide wall 9.
  • This OMT Organic Metal-to-Metamiconductor
  • This OMT Organic Metal-to-Metamiconductor
  • the waveguide 7 will at least slightly taper from the cavity 5 to its waveguide end 9 in order to be able to perform demolding.
  • the horn 5 is formed in the embodiment shown as a so-called groove horn 5 ', i. it comprises in the illustrated embodiment, three concentric grooves 5 ", which are arranged to form annular grooves 11, in such a way that from the outside inwards extending each concentric inner groove is offset in the direction of the subsequent waveguide 7. Thus leave prevent unwanted wall currents to avoid cross-polarization couplings.
  • the housing tube of the waveguide 7 and the horn 5 are preferably part of the overall housing 9, which can be closed, for example, along a sectional plane 13 by means of a housing cover 3 '.
  • the cutting plane 13 is in shown embodiment, based on the width B of the housing arranged eccentrically.
  • FIG. 2 is a schematic front view and in FIG. 3 a schematic plan view of the embodiment according to FIG. 1 shown.
  • the maximum width BH of the horn in the illustrated embodiment corresponds approximately to the width B of the converter housing 12.
  • the central axis 7 'of the waveguide 7 and the horn 5 is arranged so that this central axis 7' is located in the median plane 15, which is central and parallel to the large opposite side walls 12a and 12b of the converter housing 12, wherein the converter housing 12th , as stated, is part of the overall housing 3 and in the process the one large side wall 12b is essentially formed by the cover 3 '.
  • a modification is shown insofar as the waveguide 7 quasi not positioned on the upper longitudinal or front side 12c and formed with the converter housing 12 as an integral overall housing, but quasi exits on the front side 12d of the converter housing 12 and in the forward projecting horn 5 passes.
  • the waveguide 7, as it were is no longer directly recognizable from its contour towards the outside in the overall box-shaped converter housing 12, which thus simultaneously represents the overall housing.
  • the arrangement is such that the central axis 7 'of the waveguide 7 and the horn 5 is located in the center plane 15, which is parallel and central to the side walls 12 a.
  • the central axis 7 'of the waveguide 7 and the horn 5 can be arranged to the center plane 15 through the converter housing 12 with a small lateral offset S.
  • this lateral offset S should be so small that, starting from a predetermined horn 5 and in particular groove horn 5 'optimized for the reception of electromagnetic waves, the overall width B of the overall housing 3 should not or substantially not increase, ie preferably 45 mm and less For example, below 40 mm, for example, by 39 mm or even less should have.
  • the central axis 7 'of the waveguide does not necessarily have to lie in the middle plane 15 parallel to the large side surfaces 12a of the converter housing.
  • these deviations are preferably less than 20%, in particular less than 10%, or even less than 5% of the maximum outer diameter of the horn 5.
  • FIG. 8 is now in schematic cross-sectional representation and in FIG. 9 in longitudinal section along the median plane 15, a first embodiment in a schematic detail view reproduced.
  • a printed circuit board 19 is disposed in the chamber 20, that is, in the chamber 20, which is formed by the converter housing 12.
  • the printed circuit board 19 preferably accommodates the entire circuit arrangement for the converter circuit (LNB).
  • FIG. 9 shows, in the axial longitudinal direction of the waveguide 7 between the two freely projecting Auskoppelstatten 22 and 23 in the same plane as the coupling pins 22, 23, a reflector 27 in the form of a reflector pin 27 'is arranged.
  • a phase rotator 31 is still provided, which reflects the second plane of polarization in the reflection at the waveguide end 9, ie on the waveguide wall 9, by 90 °, so that these perpendicular to the first plane of polarization electromagnetic wave on the waveguide end closer second coupling pin 23 can be coupled out.
  • the aforementioned reflector 27 serves to ensure that the first polarization decoupled from the first decoupling pin can not run beyond the reflector to the reflector end, but only the polarization plane perpendicular to the first coupling pin is allowed to pass therethrough.
  • the distance between the first decoupling pin 22 and the reflector 27 and between the reflector 27 and the second decoupling pin 23 is usually ⁇ / 4, where ⁇ represents the operating wavelength with respect to the frequency spectrum to be received, preferably the average operating wavelength.
  • the printed circuit board 19 arranged in immediately adjacent position below the housing cover 3 '.
  • the corresponding electrical components and components are located on the housing cover 3 'facing away from the interior 20 of the converter housing 12th
  • two mutually parallel coupling pins 22 and 23 are provided, which are aligned in this embodiment but now perpendicular to the plane of the printed circuit board 19.
  • the printed circuit board covers the waveguide 7, wherein in the next to the printed circuit board 19 lying and thus the circuit board next coming point in the wall material of the waveguide 7 two corresponding bores 24 and 25 are provided through which the two mentioned Auskoppelringe 22 and 23 in the interior of the waveguide 7 protrude.
  • the structure with the aforementioned reflector 27 and the phase rotator 31 at the end of the waveguide adjacent to the waveguide end 9 is similar to the previous embodiment.
  • the Arrangement such that the circular front horn in a circular cross-section square waveguide 7, whereby the waveguide outer dimensions in the circuit board can be further reduced.
  • This allows the printed circuit board 19 immediately adjacent to provide the parallel wall of the square or rectangular waveguide in cross section, so that the total width of the overall housing 3, ie the actual converter housing 12 and the maximum outer dimension of the horn 5 again in the desired ranges of preferably less than 50 mm or even 45 mm and less.
  • a total of compact overall housing 3 especially if, as mentioned, as a waveguide 9 is not a circular waveguide, but a square in cross section waveguide is used. Because the edge length of the approximately square in cross-section waveguide 7 is much smaller than the diameter of the top view in round groove horn 5 ', so that in this case in addition to the in this case preferably straight side wall 7' of the waveguide 7 and the adjacent housing cover 3 'of the overall housing 3 enough space for the accommodation of the printed circuit board 19 remains.
  • the arrangement for this embodiment is such that a coupling pin is perpendicular to the Porterplatinenebene and from a side 7 'of preferably in cross section square waveguide 7 is guided by a hole 24 provided there radially or vertically into the interior of the waveguide 7.
  • the decoupling pin 23 is angular overall and has a support portion 23 ', which is arranged perpendicular to the actual decoupling pin 23 and the decoupling pin 23 so holds on the circuit board 19 and it connects to it electrically.
  • the decoupling pin 23 is preferably positioned in the hollow conductor during insertion through the bore 24 in a central plane.
  • an angular slot 107 is incorporated or already provided during the casting process, which allows that during the position movement along the arrow 119 of the printed circuit board of standing perpendicular to the circuit board level further decoupling pin 22 through this slot in the
  • the printed circuit board 19 extends directly adjacent to the bottom wall 27 'of the waveguide, which is also flat in this embodiment, as a square in cross-section or Basically, however, this embodiment is also possible, as in the previous exemplary embodiment, when using a waveguide which is circular in cross-section.
  • the converter housing 12 may be formed slightly conically diverging in its side walls, so that a trouble-free removal is possible.
  • the waveguide 7 is also slightly tapered towards its waveguide end in order to allow a corresponding removal from the mold.
  • a one-piece cast housing of a feed arrangement with marginal OMT can be realized in a highly compact design.
  • the maximum outer diameter of the waveguide 7 or especially the maximum outer diameter of the horn 5 and in particular of the groove horn 5 'on a measure which preferably corresponds to the thickness of the converter housing 12 or thus the thickness of the overall housing 3 , ie when viewed perpendicular to the center plane 15, which runs parallel to the larger side surfaces or parallel to the orientation of the lid 3 '.
  • the dimensioning is preferably such that the diameter of the waveguide 7 and in particular the horn 5 is perpendicular to the center plane of the thickness of the housing 12 and the overall housing 3 or this Thickness of the overall housing less than 120% and in particular less than 115% or 110% of the corresponding thickness of the horn or the waveguide transverse to the center plane.
  • the grooved horn without surrounding housing have a diameter of, for example, 40 mm and less, for example 39 mm.
  • the grooved horn can have a diameter of almost 45 mm.
  • This width preferably corresponds to the width of the feed system housing. That is, the width of the feed system housing in this case corresponds to almost 150% of the Wellenhorn diameter.

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EP08008694.5A 2007-05-31 2008-05-09 Système d'alimentation en particulier destiné à la réception de programmes radio et/ou télévisés émis par satellite Active EP1998402B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007025226A DE102007025226A1 (de) 2007-05-31 2007-05-31 Speisesystem insbesondere zum Empfang von über Satellit ausgestrahlten Fernseh- und/oder Rundfunkprogrammen

Publications (2)

Publication Number Publication Date
EP1998402A1 true EP1998402A1 (fr) 2008-12-03
EP1998402B1 EP1998402B1 (fr) 2015-12-09

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EP08008694.5A Active EP1998402B1 (fr) 2007-05-31 2008-05-09 Système d'alimentation en particulier destiné à la réception de programmes radio et/ou télévisés émis par satellite

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EP (1) EP1998402B1 (fr)
DE (1) DE102007025226A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3767744A1 (fr) * 2019-07-19 2021-01-20 Eagle Technology, LLC Système de satellite doté d'un ensemble de radiofréquence comportant une broche de couplage de signal et procédés associés

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683440A (en) 1985-02-28 1987-07-28 Mitsubishi Denki Kabushiki Kaisha High-frequency amplifier device
WO1992022938A1 (fr) * 1991-06-18 1992-12-23 Cambridge Computer Limited Systeme de capteur a guide d'ondes a double polarisation
EP0552944A1 (fr) * 1992-01-21 1993-07-28 Sharp Kabushiki Kaisha Adapteur guide d'ondes-coaxiale et convertisseur d'antenne pour radiodiffusion par satéllites comprenant un tel guide d'ondes
EP0599108A1 (fr) * 1992-11-24 1994-06-01 Matsushita Electric Industrial Co., Ltd. Convertisseur de la réception de signaux de satéllite
EP0853348A2 (fr) * 1997-01-14 1998-07-15 Sharp Kabushiki Kaisha Appareil d'entrée de guide d'ondes pour deux ondes polarisées orthogonalement avec deux sondes connectées à une plaque commune
EP0815611B1 (fr) 1995-03-11 1999-05-19 Cambridge Industries Limited Systeme de sonde a guide d'ondes a double polarisation ameliore
EP0945911A1 (fr) 1998-03-26 1999-09-29 Alps Electric Co., Ltd. Convertisseur de réception pour télédiffusion par satellite
EP1128458A1 (fr) * 2000-02-14 2001-08-29 Sony Corporation Transducteur orthomode
US20030189517A1 (en) * 2002-04-09 2003-10-09 Takao Imai Multi-layer-substrate and satellite broadcast reception apparatus
DE202005012610U1 (de) 2005-08-02 2005-12-22 Technisat Digital Gmbh Multifeed-Satellitenempfangseinrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3619220A1 (de) * 1986-06-07 1988-02-18 Kolbe & Co Hans Konvertersystem
JPH0174613U (fr) * 1987-07-06 1989-05-19
US20040130406A1 (en) * 1999-05-17 2004-07-08 Channel Master Limited Waveguide polarization rotator
JP3769494B2 (ja) * 2001-05-17 2006-04-26 シャープ株式会社 偏波分離構造、電波受信用コンバータおよびアンテナ装置
JP2004297532A (ja) * 2003-03-27 2004-10-21 Alps Electric Co Ltd 一次放射器

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683440A (en) 1985-02-28 1987-07-28 Mitsubishi Denki Kabushiki Kaisha High-frequency amplifier device
WO1992022938A1 (fr) * 1991-06-18 1992-12-23 Cambridge Computer Limited Systeme de capteur a guide d'ondes a double polarisation
EP0611488A1 (fr) 1991-06-18 1994-08-24 Cambridge Industries Limited Systeme de capteur a guide d'ondes a double polarisation
EP0611488B1 (fr) 1991-06-18 1999-01-13 Cambridge Industries Limited Systeme de capteur a guide d'ondes a double polarisation
EP0552944A1 (fr) * 1992-01-21 1993-07-28 Sharp Kabushiki Kaisha Adapteur guide d'ondes-coaxiale et convertisseur d'antenne pour radiodiffusion par satéllites comprenant un tel guide d'ondes
EP0599108A1 (fr) * 1992-11-24 1994-06-01 Matsushita Electric Industrial Co., Ltd. Convertisseur de la réception de signaux de satéllite
EP0815611B1 (fr) 1995-03-11 1999-05-19 Cambridge Industries Limited Systeme de sonde a guide d'ondes a double polarisation ameliore
EP0853348A2 (fr) * 1997-01-14 1998-07-15 Sharp Kabushiki Kaisha Appareil d'entrée de guide d'ondes pour deux ondes polarisées orthogonalement avec deux sondes connectées à une plaque commune
EP0945911A1 (fr) 1998-03-26 1999-09-29 Alps Electric Co., Ltd. Convertisseur de réception pour télédiffusion par satellite
EP1128458A1 (fr) * 2000-02-14 2001-08-29 Sony Corporation Transducteur orthomode
US20030189517A1 (en) * 2002-04-09 2003-10-09 Takao Imai Multi-layer-substrate and satellite broadcast reception apparatus
DE202005012610U1 (de) 2005-08-02 2005-12-22 Technisat Digital Gmbh Multifeed-Satellitenempfangseinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3767744A1 (fr) * 2019-07-19 2021-01-20 Eagle Technology, LLC Système de satellite doté d'un ensemble de radiofréquence comportant une broche de couplage de signal et procédés associés

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Publication number Publication date
DE102007025226A1 (de) 2008-12-04
EP1998402B1 (fr) 2015-12-09

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