EP1502371A1 - Verfahren sowie vorrichtung zur erzeugung zumindest eines transponders in der satelliten-zwischenfrequenz-ebene - Google Patents
Verfahren sowie vorrichtung zur erzeugung zumindest eines transponders in der satelliten-zwischenfrequenz-ebeneInfo
- Publication number
- EP1502371A1 EP1502371A1 EP03729960A EP03729960A EP1502371A1 EP 1502371 A1 EP1502371 A1 EP 1502371A1 EP 03729960 A EP03729960 A EP 03729960A EP 03729960 A EP03729960 A EP 03729960A EP 1502371 A1 EP1502371 A1 EP 1502371A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- satellite
- frequency band
- transponder
- frequency
- mhz
- 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
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims description 20
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000010287 polarization Effects 0.000 description 12
- 230000001681 protective effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving
Definitions
- the invention relates to a method and a device for generating at least one transponder in the satellite intermediate frequency level according to the preamble of claims 1 and 7, respectively.
- the converter can be controlled on the subscriber side in such a way that both the vertical and the horizontal polarizations can be received.
- the polarization is conventionally switched over by switching a supply voltage from 14 V (for the reception of the vertical polarizations) to 18 V (for the reception of the horizontal polarizations).
- a frequency tone of 22 kHz can also be used to switch from a lower to an upper frequency band, via which even more satellite programs can be received.
- twin converters twin LNBs
- the input-receiving circuit arrangement comprising the converter circuit basically comprises two leads to the connected subscriber or receiver, in order then to receive a program, for example, on the connected television and via a video device (VCR) connected to the twin receiver. to be able to record another program fed in via the second antenna line.
- VCR video device
- So-called satellite frequency converters are used, so-called sat. IFL converters in which individual frequency ranges, for example transponders with a bandwidth of approximately 40 MHz, are selected and newly combined and transmitted on the single cable. Due to the available bandwidth of 950-2150 MHz and the required distances between the transponders, the number of transponders transmitted is limited. In contrast, the number of receivers that can be connected to the cable network is free.
- the transponders are selected by the receivers, i.e. that each receiver controls a set of Sat.-ZFl / Sat.-ZFl converter and the upstream matrix
- the program selection is again unrestricted, although the number of receivers that can be connected is equal to the number of Sat. -ZFl / Sat. -ZFl converter is.
- the combination of an implemented satellite is. -ZFl / Sat. IFL band for the receiver and a selected transponder for the second receiver an advantageous solution.
- the satellite. -ZFl / Sat. -ZFl-converter for the selection of a transponder based on the known techniques very complex and expensive.
- the Ku band (10700 MHz to 12750 MHz) is mixed into a satellite by mixing with a first local oscillator of 9750 MHz.
- IFL frequency range from 950 to 1950 MHz and with a second local oscillator from 10600 MHz at for example in a satellite.
- IFL frequency range from 1100 MHz to 2150 MHz implemented. This already has the one disadvantage that the selected local oscillator frequencies generate undesired mixed products that fall into the intermediate frequency level used.
- a matrix In order to select individual transponders from these frequency bands, a matrix must be used for the selection of the frequency bands. Furthermore, a conversion to the intermediate frequency level with an IF frequency of 480 MHz must be carried out with a mixer and a tunable local oscillator with a tuning frequency of, for example, 1400 MHz to 2700 MHz. Because of the additional need for image rejection, a tunable bandpass filter must also be used before the mixer. The desired transponder is then selected using a downstream SAW filter of 480 MHz. In order to compensate for the attenuation of the SAW filter, an amplification must also be carried out. Finally, another mixer with another local oscillator has to be converted back into Sat. -ZFl level. As mentioned, the need to use two local oscillators and the necessary shielding and also the selection to avoid undesired mixed products is very disadvantageous.
- a specific program is implemented in a transponder area. This transponder can then be used with a satellite. -ZFl band can be combined, with the second participant receiving the programs received via this satellite. -ZFl band received received.
- a first implementation of the lower satellite intermediate frequency band with a local oscillator of preferably exactly 9550 MHz and a first Implementation of the upper satellite frequency band with a local oscillator of preferably exactly 1625 MHz is proposed.
- the mixed products of the two local oscillators are then at 1075 and 2150 MHz exactly at the lower and upper limits of the satellite intermediate frequency bands, here at 1150 to 2150 MHz for the lower and 1075 to 2125 MHz for the upper band and interfere because of the protective distances the band limits no signal.
- such a transponder is combined with a freely selectable satellite intermediate frequency band, preferably via a crossover network.
- a frequency range of, for example, less than 1000 MHz for the converted frequency band, specifically with the desired transponder with the highest possible frequency without distortion by the lower frequency filter of the crossover.
- a terrestrial frequency range can also preferably be switched on with a crossover. This even results in a bandpass filter characteristic for the desired transponder.
- the described converter and the crossover can also be installed directly in a converter (LNB). This means that with each cable connected to the converter (LNB) two receivers or one twin receiver can be connected for a complete, independent program selection.
- a converter with the two local oscillators is also spatially separated from a matrix with converters and a combination of the selected transponder with a selected satellite.
- -ZFl band can be positioned.
- the crossover and the filters used are of particular quality, e.g. also to combine two or three selected transponders with the unconverted satellite IF band.
- even several transponder bands can be combined without a combination with a satellite IF band.
- Figure 1 a representation of an improved LNB with improved selected local oscillator frequencies for the first and second
- Figure la a representation of an inventive
- Figure 2 a universal twin LNB according to the invention with additionally generated transponder, which with a freely selectable satellite. IFL band is combined via a crossover network and fed into a single-cable derivation;
- FIG. 2a schematic representation of a transponder with a transponder width of 40 MHz and a center frequency of 950 MHz;
- Figure 3 is a schematic representation of the combination of the transponder with a satellite IFL band
- FIG. 4 a representation corresponding to FIG. 3 if a terrestrial frequency range is also connected;
- Figure 5 shows a single-cable twin LNB
- Figure 6 shows a single-cable Quattro solution
- FIG. 7a a switching matrix according to the prior art
- FIG. 7b shows a switching matrix which has been expanded in accordance with the invention
- Figure 8 shows an example of a one-cable triple converter solution
- FIG. 9 shows a representation of the combination of two transponder areas with a satellite IFL band, as is obtained when a circuit according to FIG. 8 is implemented;
- Figure 10 An example of a single-cable quad LNB
- Figure 11 a presen- tation regarding four combined transponders accordingly Circuit arrangement according to FIG. 10.
- FIG. 1 shows a schematic arrangement of the basic structure of a satellite receiving system according to the invention with a so-called universal twin converter (LNB) 1.
- LNB universal twin converter
- an amplifier arrangement 3 and a downstream bandpass filter 5 are provided, for example.
- a mixer 7 is then arranged in each of the two branches. Furthermore, two local oscillators 9 and 11 are provided, via which the respective received satellite frequency is converted into a satellite intermediate frequency in the mixers 7.
- the downlink frequencies of the satellites in the Ku band in Europe are 10700 MHz to 12750 MHz.
- the lower frequency band (low band) ranges from 10700 MHz to about 11700 MHz.
- the upper frequency band (high band) extends from 11700 MHz to 12750 MHz.
- the upper frequency band range for example the vertically or horizontally polarized received signals in the first or in the second branch 1 ', 1 "
- the second local oscillator 11 with the high local oscillator frequency of 10625 MHz chosen according to the invention there is an inverse conversion of the received upper satellite frequency band from 11700 MHz to 12750 MHz into a satellite IF range from 1075 MHz to 2125 MHz.
- the upper and upper limits of the satellite intermediate frequency bands are 1150 to 2150 MHz for the lower and 1075 to 2125 MHz for the upper band and therefore do not interfere with any signal due to the protective distances at the band limits. This is made possible, among other things, by selecting the higher local oscillator frequency so that it lies higher than the lower end of the upper frequency band, i.e. at 13850 MHz it is higher than the lower end of the upper frequency band at 12750 MHz.
- the local oscillators 7 can again one or more stage amplifier arrangements 8 may be connected downstream.
- a universal twin LNB improved according to the invention is now shown with reference to FIG.
- the basic principle of this is similar to that of FIG.
- the only difference in this exemplary embodiment is that the first local oscillator frequency LO 1 is 9600 MHz and the second local oscillator frequency LO 2 is 13850 MHz.
- the lower satellite frequency band from 10700 to 11700 MHz is converted into a satellite IF from 1100 MHz to 2100 MHz.
- the upper satellite frequency band is also converted into a satellite intermediate frequency from 1100 MHz to 2150 MHz.
- the implementation takes place in such a way that the lower limit frequency for the lower frequency band is the same as for the received upper frequency band and in the exemplary embodiment shown is significantly higher than the lower frequency limit of the low band for a standard universal LNB.
- the corresponding conversion of the upper satellite frequency band into the satellite IF level takes place using a local oscillator frequency that lies above the upper satellite frequency band.
- a 2-x-2 matrix 19 is connected downstream, at whose two outputs 21a and 21b, as is known, one subscriber could be connected, the lower or upper one of the vertical or horizontal could receive polarizations.
- a further mixer 23 is now connected to the one output, in the exemplary embodiment shown at output 21b, which is connected via a tunable oscillator 25 from, for example, 2025 to 3100 MHz with a subsequent selection, for example by means of a bandpass filter 26 at, for example, 950 MHz center frequency and a bandwidth of 40 MHz generates a freely selectable transponder, as shown with reference to Figure 2a.
- the transponder branch 29b provided with the mixer 23 and a bandpass filter 26 can now be connected to the branch 29a connected to the other output 21a via a downstream crossover 27.
- the output 27a of the crossover 47 is thus connected to a single antenna cable 31, usually a coax cable.
- This single-cable solution then enables twin reception.
- the transponder 33 generated is combined with a freely selectable satellite IF band 35, as is shown schematically in FIG. 3.
- FIG. 4 shows that, for example, a terrestrial area 37 can also be connected via a further crossover, which connects below 862 MHz. This even results in a bandpass filter characteristic for the desired transponder 33.
- a converter structure is used here, which ultimately feeds a 4 ⁇ 4 matrix 19 via four branches 1 a to 1 d, so that at the output of this matrix the lower frequency band received via the vertical polarization and the one received via the vertical polarization in a known manner
- Upper frequency band, the lower frequency band received via the horizontal polarization and, for example, the upper frequency band received via the horizontal polarization are each present separately and simultaneously.
- FIG. 7a shows a conventional converter, at the four outputs of which in the IF plane the upper and lower frequency bands of the signals received vertically and horizontally are applied. It is indicated in FIG. 7a that the two local oscillators 9 and 11 can operate with a local oscillator frequency of 9600 MHz or 13850 MHz, as shown with reference to FIG. La, or, as was explained with reference to FIG. 1, with one Local oscillator frequency of 9550 MHz and 10625 MHz. The implementation in the satellite intermediate frequency level then takes place accordingly, as was explained with reference to the exemplary embodiments according to FIG. 1 or FIG.
- a changeover matrix 37 can then be connected downstream of the converter shown in FIG. 7a.
- Several of the switching matrix arrangements can also be connected in series. In this case, as in the previous examples, two outputs, namely a first branch 29a and a transponder branch 29b, are again connected together at the outputs shown at the bottom in FIG. 7b, again via a crossover 27.
- the output 27a of the relevant crossover 27 is connected to the input of a further crossover, with a terrestrial one at the second input of the downstream crossover 39 Signal is fed. Twin operation can then again be carried out at the output 41 of these downstream crossovers 39, for which purpose an antenna cable 31 is usually connected in each case.
- transponder band area can be combined with a satellite IF band area, but also a so-called one-cable triple converter solution is also possible in which, for example, two are offset horizontal transponder frequency ranges can be combined with a satellite IF band range.
- three outputs 21a, 21b, 21c on the one hand and 21d, 21e, 21f on the other hand are interconnected via three parallel lines of a downstream crossover network 27, with a branch 29a in each case between the matrix and the Crossover is switched through, in a second branch 29b again a mixer controlled by a local oscillator, preferably with a downstream bandpass filter for generating a first transponder 33, for example with a transponder center frequency of 950 MHz, and finally a mixer in the third branch line 29c is provided with a further local oscillator, the local oscillator frequency being selected such that a second transponder 33a with a transponder center frequency of, for example, 1020 MHz is generated via the mixer.
- a local oscillator preferably with a downstream bandpass filter for generating a first transponder 33, for example with a transponder center frequency of 950 MHz
- a mixer in the third branch line 29c is provided with a further local oscillator, the local oscillator frequency
- both transponder ranges are also at a distance below the lower limit of 1100 MHz of the satellite intermediate frequency band range which then adjoins upwards.
- the principle described could also be expanded in accordance with FIGS. 10 and 11 in such a way that a plurality of transponders spaced apart from one another are generated, and these transponder branches 29 are then combined via a crossover network. This allows multiple transponders to be fed onto a single common antenna line.
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Radio Relay Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10219847 | 2002-05-03 | ||
| DE10219847A DE10219847A1 (de) | 2002-05-03 | 2002-05-03 | Verfahren sowie Vorrichtung zur Erzeugung zumindest eines Transponders in der Satelliten-Zwischenfrequenz-Ebene |
| PCT/EP2003/004583 WO2003094397A1 (de) | 2002-05-03 | 2003-05-01 | Verfahren sowie vorrichtung zur erzeugung zumindest eines transponders in der satelliten-zwischenfrequenz-ebene |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1502371A1 true EP1502371A1 (de) | 2005-02-02 |
| EP1502371B1 EP1502371B1 (de) | 2006-05-31 |
| EP1502371B8 EP1502371B8 (de) | 2006-09-13 |
Family
ID=29285081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03729960A Expired - Lifetime EP1502371B8 (de) | 2002-05-03 | 2003-05-01 | Verfahren sowie vorrichtung zur erzeugung zumindest einer transponderfrequenz in der satelliten-zwischenfrequenz-ebene |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1502371B8 (de) |
| AT (1) | ATE328412T1 (de) |
| AU (1) | AU2003240585A1 (de) |
| DE (2) | DE10219847A1 (de) |
| WO (1) | WO2003094397A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005040012A1 (de) * | 2005-08-23 | 2007-03-01 | Christian Schwaiger Gmbh | Verfahren und Vorrichtung zur Konfiguration von n unabhängigen Teilnehmern einer Satelliten-Empfangsanlage |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005008125A1 (de) * | 2005-02-21 | 2006-09-07 | FTA Communications Technologies S.à.r.l. | LNB-Empfangseinrichtung |
| EP1819061A3 (de) | 2006-02-14 | 2011-08-31 | Alps Electric Co., Ltd. | Frequenzumwandler zum Empfang von Satellitenübertragungen |
| JP2007282094A (ja) * | 2006-04-11 | 2007-10-25 | Sharp Corp | 無線受信装置 |
| DE202008015500U1 (de) | 2008-11-21 | 2009-02-12 | Christian Schwaiger Gmbh | Satelliten-Empfangs- und Verteilanlage als Kopfstelle mit programmierbarer Transponderumsetzung von Transponderblöcken |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3929824A1 (de) * | 1989-09-07 | 1991-03-14 | Kathrein Werke Kg | Zwei-band-konverteranordnung |
| DE4126774A1 (de) * | 1991-08-13 | 1993-02-18 | Kathrein Werke Kg | Konverteranordnung zum empfang von satelliten-empfangssignalen |
| DE4128947C2 (de) * | 1991-08-30 | 1996-01-25 | Wolf & Co Kg Kurt | Gerät für Satellitenempfangsanlagen |
| DE9306499U1 (de) * | 1993-03-19 | 1993-07-08 | Richard Hirschmann GmbH & Co, 7300 Esslingen | Schaltungsanordnung und Vorrichtung zum Betreiben einer Antennenempfangsvorrichtung |
| DE4335616C2 (de) * | 1993-10-19 | 1996-02-22 | Kathrein Werke Kg | Satellitenempfangsanlage |
| US5959592A (en) * | 1996-03-18 | 1999-09-28 | Echostar Engineering Corporation | "IF" bandstacked low noise block converter combined with diplexer |
| DE19713124C2 (de) * | 1997-03-27 | 2001-11-29 | Kathrein Werke Kg | Satelliten-Empfangsanlage |
| DE29716786U1 (de) * | 1997-09-18 | 1997-11-27 | Yen, Kerl, Chung Li, Taoyuan | Satellitenfrequenzdemultiplexer mit Signalteilung am Welleneingang |
| DE29914050U1 (de) * | 1999-08-12 | 1999-11-11 | Kathrein-Werke Kg, 83022 Rosenheim | Twin-Konverter |
-
2002
- 2002-05-03 DE DE10219847A patent/DE10219847A1/de not_active Withdrawn
-
2003
- 2003-05-01 DE DE50303588T patent/DE50303588D1/de not_active Expired - Lifetime
- 2003-05-01 AU AU2003240585A patent/AU2003240585A1/en not_active Abandoned
- 2003-05-01 AT AT03729960T patent/ATE328412T1/de active
- 2003-05-01 EP EP03729960A patent/EP1502371B8/de not_active Expired - Lifetime
- 2003-05-01 WO PCT/EP2003/004583 patent/WO2003094397A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03094397A1 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005040012A1 (de) * | 2005-08-23 | 2007-03-01 | Christian Schwaiger Gmbh | Verfahren und Vorrichtung zur Konfiguration von n unabhängigen Teilnehmern einer Satelliten-Empfangsanlage |
| EP1760917A1 (de) | 2005-08-23 | 2007-03-07 | Christian Schwaiger GmbH | Verfahren und Vorrichtung zur Konfiguration von n unabhängigen Teilnehmern einer Satelliten-Empfangsanlage |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10219847A1 (de) | 2003-11-27 |
| WO2003094397A1 (de) | 2003-11-13 |
| EP1502371B8 (de) | 2006-09-13 |
| ATE328412T1 (de) | 2006-06-15 |
| EP1502371B1 (de) | 2006-05-31 |
| DE50303588D1 (de) | 2006-07-06 |
| AU2003240585A1 (en) | 2003-11-17 |
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