EP2634936B1 - 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
EP2634936B1
EP2634936B1 EP13000877.4A EP13000877A EP2634936B1 EP 2634936 B1 EP2634936 B1 EP 2634936B1 EP 13000877 A EP13000877 A EP 13000877A EP 2634936 B1 EP2634936 B1 EP 2634936B1
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EP
European Patent Office
Prior art keywords
signal
feed system
bandpass filter
satellite
intermediate frequency
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EP13000877.4A
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German (de)
English (en)
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EP2634936A1 (fr
Inventor
Peter Prassmayer
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Kathrein SE
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Kathrein Werke KG
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    • 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 present invention relates to a feed system, in particular for the reception of television and / or radio programs broadcast via satellite according to the preamble of claim 1.
  • Feeders are commonly used to receive television and radio programs broadcast over geostationary satellites. In this case, analog or digitally broadcast programs can be received in such feed systems.
  • a corresponding feed system is usually arranged in the focal point or in the region of the focal point of a parabolic antenna and comprises a waveguide, in the at least one coupling pin for receiving radiated in a plane of polarization electromagnetic waves protrudes.
  • the electromagnetic wave can be coupled out and a downstream converter (LNB) are supplied, in which a corresponding processing for frequency conversion of the satellite received signals.
  • LNB downstream converter
  • the amplified, filtered and frequency converted signal is output in known from the prior art feed systems via a coaxial output, which is provided in the converter housing.
  • the satellite signal is distributed to one or more terminals (for example, a television with an antenna connection).
  • feeding systems are known from the prior art, which comprise an orthomode transducer, which is also referred to as Orthormenkoppler or as polarization diverter.
  • An orthomode transducer has a horn at the receiver end, for example a groove horn, which merges into a waveguide.
  • Two mutually offset coupling pins protrude into the waveguide, a first coupling pin being provided for receiving electromagnetic waves emitted in a first polarization plane, and a second coupling pin being provided for receiving electromagnetic waves emitted in a second polarization plane perpendicular to the first polarization plane.
  • the respective satellite received signals are processed separately by a downstream converter and by means of Two separate coaxial outputs are output, so that two separate television and / or radio programs can be distributed over two coaxial cables to terminals.
  • Some broadcast satellites broadcast broadband television and / or broadcast signals in a frequency range of 10.7 GHz to 12.75 GHz, so that the satellite signal consequently has a bandwidth of 2.05 GHz.
  • Modern feed systems can process these broadband satellite signals, but in the converter the signals must be converted into a so-called low band (low frequency band) in the frequency range of 10.7 GHz to 11.7 GHz and a high band (high frequency band) in the frequency range of 11.7 GHz to 12.75 GHz, so that the processed signals can be distributed via coaxial outputs and coaxial cable to terminals. Because the transmissible via a coaxial cable maximum frequency of a signal can only be significantly less than 3 GHz.
  • a feed system with orthomode transducers and split into lowband and highband four separate television and / or radio programs can be distributed over four data signal output interfaces in the form of four coaxial outputs (horizontally polarized lowband, vertically polarized lowband, horizontally polarized highband, vertically polarized highband).
  • a corresponding feed system has for this purpose two high frequency amplifiers, two splitters, four input bandpasses, four mixers, two local oscillators, four output bandpasses and four intermediate frequency amplifiers. These electrical components each take electrical energy and consequently each have a heat development.
  • the DE 43 35 616 A1 discloses a well-known feed system.
  • the received frequency band is frequency-selectively split into two frequency branches in at least one converter branch, wherein a local oscillator in the one frequency band has a local oscillator frequency which is below the frequency band converted into the intermediate frequency level in this frequency branch, and wherein the total oscillator frequency in the second frequency branch is above the lowest frequency of the frequency band converted into the intermediate frequency plane in this frequency branch.
  • the US 2002/0154055 A1 describes a satellite receiving system having one or more low-noise block converters (LNB) whose outputs are connected to a local area network (LAN), where an interface between a LNB and LAN with a receiver detects the RF output signals of the LNBs converts digital baseband information.
  • LNB low-noise block converters
  • LAN local area network
  • This baseband information is filtered, compressed and encrypted in the interface before being sent as a multiplexed signal to the LAN and further to the connected terminals.
  • the external dimensions of a feed system including the converter housing should be as low as possible so that the weight of the feed system and the wind load through the feed system are kept as low as possible. Furthermore, a compact converter housing is desirable for design reasons. Due to the necessary compactness of the feed system and the converter housing, the heat generated by the electrical components can be derived only with difficulty. Additional electrical components within the converter housing are thus difficult to realize.
  • LAN interface for example in the form of an Ethernet connection or an antenna for receiving WLAN signals.
  • corresponding flat panel displays have a coaxial antenna port for receiving television signals.
  • IP Internet Protocol
  • Ethernet In many households, there is already an Ethernet with a central router, because, for example, more than one computer to DSL (Digital Subscriber Line) to be connected, or because, for example, a central printer for a variety of computers is available.
  • DSL Digital Subscriber Line
  • Both the coaxial network for distributing the television and / or radio programs as well as the Ethernet are usually realized as so-called star networks, so that these are virtually one above the other and exist parallel to each other.
  • An internet-enabled flat screen is thus connected to the coaxial network for displaying television programs via the antenna connection and to the Ethernet for the reproduction of Internet content via the Ethernet connection.
  • a generic distribution system for satellite broadcasting is for example from the WO 2004/054 143 A1 known.
  • a system is shown with a reflector and a receiving device arranged in the focal point or in the region of the focal point.
  • the receiving unit is connected by means of a bus system with different participants.
  • the receiving unit further comprises a modem converter, a preamplifier, a receiver and a bus interface, via which the receiving unit is coupled to the bus system.
  • the receivers are those units which demodulate the signals and, if necessary, decode them.
  • the known system comprises at least one LNB, possibly necessary frequency converter and at least one receiving receiver together with a bus interface, so that only demodulated and / or - if desired or necessary - decoded signals can be distributed by means of the bus system to the participants.
  • the signals can be transmitted via the bus system optionally re-encoded according to the bus system standard.
  • a structure can be used, which is also used for data transmission in PC networks. Therefore, it is possible to provide only a single network infrastructure, which handles all possible communication tasks in a housing.
  • the explanatory components are all housed in a single housing, which is also used for example for the LNBs. Therefore, according to this prior publication, the entire unit in the LNB housing with the mentioned additional components is mounted on the antenna.
  • a digital television transmission signal receiving system and an external arrangement used in this system can be taken as known.
  • This outer assembly includes, for example, a housing and a tuner over which an RF signal can be received.
  • the tuner is coupled to a demodulator, which in turn can transmit MPEG signals to a wireless interface (LAN 1394), which in turn is transmitted via an antenna to an indoor arrangement.
  • LAN 1394 wireless interface
  • the outer arrangement should be arranged in the vicinity of the antenna, for example on an outer wall.
  • a distribution system for satellite broadcasting which comprises a satellite receiving antenna for receiving the satellite signals, receivers for demodulating the signals received by the antenna and a line system for distributing the signals to a plurality of subscribers, the receivers being spatially close to the satellite receiving antenna are and redistribute exclusively demodulated or decoded signals by means of the line system to the participants.
  • the receiver comprises a waveguide and a housing, wherein in the housing are arranged: a decoupling device, a high frequency amplifier, an intermediate frequency amplifier and a tuner.
  • the invention is based on the object to provide an improved feed system having a reduced power consumption and reduced heat generation and a reduced number of data signal output interfaces.
  • an input bandpass and an output bandpass of the inventive feed system have passband widths equal to or greater than the satellite signal bandwidth having at least 2.05 GHz.
  • the feed system according to the invention further comprises a arranged in the housing of the feed system and connected via a signal line to an intermediate frequency amplifier broadband tuner, which converts the output of the intermediate frequency amplifier intermediate frequency signal of a transponder into a baseband signal and generates I and Q signals, each half the bandwidth as the pass bandwidth have the input and output bandpass.
  • the feed system according to the invention further comprises a demodulator arranged in the housing of the feed system and connected via the signal line to the wideband tuner, which is designed to demodulate the baseband signal and to generate a data signal.
  • the feed system according to the invention comprises an Ethernet interface, which is arranged in the housing and connected via the signal line to the demodulator. The data signals can be output via the Ethernet interface and the supply of the feed system with electrical energy via the Ethernet interface.
  • a broadband satellite signal for example, having a bandwidth of 2.05 GHz
  • the signal processing by the converter always has a wideband signal. Due to the conversion of the wideband intermediate frequency signal into a baseband signal by the wideband tuner and subsequent demodulation of the baseband signal into a data signal by the demodulator, the data signal thus generated can be output via the single Ethernet interface.
  • the feed system according to the invention is therefore no longer dependent on the bandwidth-limited signal output via one or more coaxial interfaces.
  • the tuner is also configured as a broadband tuner for processing the signals in the passband bandwidth.
  • the frequency conversion device provided in the context of the invention also proves to be advantageous using a local oscillator which generates a local oscillator signal with a local oscillator frequency in order to control a mixer arranged between the input bandpass and the output bandpass and connected thereto via the signal line is.
  • an input bandpass filter, a mixer, a local oscillator, an output bandpass filter and an intermediate frequency amplifier can be saved compared to a feed system known from the prior art. Consequently, the feed system according to the invention has a reduced energy consumption and reduced heat generation. Furthermore, the space available in the converter housing for the Breitbandtuner and the demodulator can be used. Due to the reduced energy consumption of the feed system according to the invention this can be supplied via the Ethernet interface with electrical energy.
  • a coaxial network is no longer necessary for transmitting satellite and / or broadcast programs broadcast via satellite.
  • the television and / or radio programs are transmitted over the Ethernet to the terminals.
  • a twisted pair cable, wireless for WLAN or a power supply line (power cable) can be used to transmit the television and / or radio programs.
  • a modern flat panel display can thus display television programs received via satellite as well as receive and display information received over the Internet without the flat screen must be connected to a coaxial network. Therefore, when using the feed system according to the invention, a redundant coaxial network can be completely saved. Furthermore, all the disadvantages of coaxial signal processing, such as attenuation, skew, nonlinear distortion and crosstalk between polarization and band planes are avoided.
  • terminals such as smartphones, laptops or tablets, which do not have a coaxial input for receiving television programs, can access television signals directly via the Ethernet by using the inventive feed system.
  • a second outcoupling device protruding into the waveguide is furthermore arranged in the housing, by means of which the electromagnetic waves of the satellite signal radiated in a second polarization plane can be received.
  • the second polarization plane is perpendicular to the first plane of polarization in which electromagnetic waves of the satellite signal are emitted, which can be received by means of the first outcoupling device.
  • a second high-frequency amplifier for amplifying the satellite signal is arranged, which is connected via a second signal line to the second coupling-out device.
  • a second input bandpass and a second output bandpass are further arranged, which are connected in series via the second signal line to the second high-frequency amplifier, wherein the second Input bandpass and the second output bandpass each have the passband bandwidth which is at least 70% of the satellite signal bandwidth.
  • a second mixer is disposed between the second input bandpass and the second output bandpass and connected thereto via the second signal line, the second mixer being further connected to and to the local oscillator. The second mixer mixes the satellite signal with the local oscillator signal to produce a second intermediate frequency signal.
  • a second intermediate frequency amplifier disposed in the housing is connected to the second output bandpass via the second signal line and configured to amplify the second intermediate frequency signal.
  • the broadband tuner is additionally connected via the second signal line to the second intermediate frequency amplifier and configured to convert the second intermediate frequency signal into a second baseband signal.
  • the demodulator is additionally connected to the broadband tuner via the second signal line and configured to demodulate the second baseband signal and to generate a second data signal.
  • the Ethernet interface is connected via the second signal line to the demodulator for exchanging the second data signals.
  • a corresponding feed system can process satellite signals having a 2.55 GHz satellite signal bandwidth and having vertically and horizontally polarized signal components.
  • corresponding satellite signals have known from the prior art feed systems, so-called quadruple or quatro LNB's, four coaxial outputs.
  • quadruple or quatro LNB's four coaxial outputs.
  • two input bandpasses, two splitters, two mixers, a local oscillator, two output bandpass filters and two intermediate frequency amplifiers can be saved compared to a feed system known from the prior art. Consequently, the feed system according to the invention has a reduced energy consumption and reduced heat generation.
  • a complete side of the converter may be used for other additional components such as e.g. for the broadband tuner and the demodulator. Due to the reduced energy consumption of the feed system according to the invention this can be supplied via the Ethernet interface with electrical energy.
  • the passband widths of the second input bandpass and the second output bandpass are equal to or greater than the satellite signal bandwidth.
  • the passband bandwidth of the second input bandpass and the second output bandpass is at least 2.05 GHz. This allows more information to be processed and distributed by the feed system.
  • the feed system comprises a backend processor located in and connected to the housing between the demodulator and the Ethernet interface, the backend processor thereto is designed to demultiplex the data signal and / or the second data signal in data transport streams.
  • FIG. 1 shows a block diagram of a known from the prior art feed system for receiving and processing of broadband satellite signals, which consist of emitted in two polarization planes electromagnetic waves.
  • the feed system comprises a feedhorn 1, which can be configured as a grooved horn, and which merges into a waveguide 1.
  • an orthomode transducer 2 is arranged, which can separate mutually perpendicular polarized electromagnetic waves of the satellite signal from each other.
  • the orthomode transducer 2 protrude a first decoupling device 10 and a second decoupling device 20, which are each realized as Auskoppelstatte.
  • the first outcoupling device 10 and the second outcoupling device 20 can be aligned parallel to one another.
  • two Auskoppeljane be provided, which protrude into a waveguide 1, wherein the first Auskoppel forest 10 would then have to be rotated to the second Auskoppelh 20 by 90 °.
  • the orthomode transducer 2 has two signal outputs, namely a first signal output in the form of a Signal line 11 for the satellite signal, which is received via horizontally polarized electromagnetic waves, and a second signal output in the form of a second signal line 21, are transported over the signals obtained from vertically polarized electromagnetic waves of the satellite signal.
  • the following describes the signal processing of the signals obtained from the electromagnetic waves having horizontal polarization of the satellite signal.
  • the processing of the signals obtained from the vertically polarized electromagnetic waves of the satellite signal is correspondingly identical.
  • the first decoupling pin 10 protrudes into the orthomode transducer 2 and is configured to receive electromagnetic waves of horizontal polarization.
  • a three-stage high-frequency amplifier 12 is connected via the signal line 11 to the first decoupling pin 10.
  • the radio frequency amplifier 12 is configured to amplify the satellite signal.
  • the output of the high-frequency amplifier 12 is connected to the input of a splitter SH, which splits the broadband emitted satellite signal, for example, has a bandwidth of 10.7 GHz to 12.75 GHz, in a so-called low band and a so-called high band.
  • the low band is a low frequency signal band of 10.7 to 11.7 GHz
  • the high band is a high frequency signal band of 11.7 to 12.75 GHz.
  • the splitter SH has two outputs, namely an output for the low band and an output for the highband.
  • the output for the low band is connected to a first low band input bandpass 13L.
  • the first low band input bandpass filter 13L has a passband in the frequency range of 10.7 to 11.7 GHz. Other frequencies are not allowed through.
  • the first low band input bandpass filter 13L is connected via the first signal line 11 to a first mixer 14, which in turn is connected to a low band local oscillator 30L.
  • the low band local oscillator 30L generates a low band local oscillator signal having a low band local oscillator frequency of 9.75 GHz.
  • This low-band local oscillator signal is mixed with the satellite signal frequency-filtered via the first low-band input bandpass filter 13L by the mixer 14.
  • the mixer 14 generates, inter alia, the difference signal resulting from the difference of the satellite signal and the low-band local oscillator signal.
  • This thus generated first intermediate frequency signal has signals with frequencies of 950 MHz to 1950 MHz, thus has a bandwidth of 1 GHz.
  • the first mixer 14 is connected to a first low band output bandpass 15L having a passband of 950 MHz to 1950 MHz. Other frequencies are not passed by the first low band output bandpass.
  • the first low band output bandpass 15L is connected via the first signal line 11 to a first low band intermediate frequency amplifier 16L which amplifies the intermediate frequency signal.
  • the first low-band intermediate frequency amplifier 16L is in turn connected to a first coaxial output 71 through which the amplified Intermediate frequency signals can be output.
  • a first highband input bandpass filter 13H is connected to the second output of the splitter SV via a signal line.
  • the pass band of the first high band band pass 13H is between 11.7 GHz and 12.75 GHz. Other frequency ranges are not passed by the first highband input bandpass 13H.
  • the first high band input band pass 13H is connected to another mixer 14 via a signal line.
  • the further mixer 14 is connected to a high band local oscillator 30H which generates a high band local oscillator signal with a high band local oscillator frequency of 10.6 GHz.
  • the further mixer 14 mixes the high band local oscillator frequency signal with the satellite signal filtered by the first high band input bandpass filter 13H.
  • the further mixer 14 also generates a difference signal between the high-frequency satellite signal and the high-band local oscillator signal. This difference signal represents another intermediate frequency signal having frequencies of 1100 MHz to 2150 MHz, thus having a bandwidth of 1.05 GHz.
  • This intermediate frequency signal is filtered again by a first highband output bandpass filter 15H to filter out possible image frequencies and other frequency ranges.
  • the pass band of the first high band output band pass 15H is between 1100 MHz and 2150 MHz. Other frequency ranges will not be transmitted.
  • With the first High band output band pass 15H is connected to a first high band intermediate frequency amplifier 16H, which in turn is connected to a third coaxial output 73. Via the third coaxial output 73, the thus frequency-processed and amplified signals can be output.
  • the signal processing of the signals obtained from the vertical vibration component electromagnetic waves is identical to the above-described signal processing of the signals obtained from the horizontal vibration component electromagnetic waves, so that a description of the frequency processing will not be given here.
  • This prior art feed system can thus process satellite signals broadband broadcast in a frequency range of 10.7 GHz to 12.75 GHz and having a horizontal and a vertical polarization component.
  • the frequency-processed television and / or radio programs are output via four coaxial outputs 71-74.
  • FIG. 2 shows a block diagram of a feed system according to the invention according to a first embodiment of the present invention.
  • the feed system according to the invention comprises a waveguide 1, which may be equipped on the input side, for example with a grooved horn.
  • the waveguide 1 projects as a decoupling pin 10 first decoupling means 10, by means of which a signal consisting of electro-magnetic waves and emitted by the satellite satellite signal can be received.
  • the first decoupling pin 10 is connected via the first signal line 11 to a first high-frequency amplifier 12.
  • the satellite signal received by the feed system has frequencies in the range of 10.7 GHz to 12.75 GHz.
  • This satellite signal is broadband amplified by the first high-frequency amplifier 12.
  • the first high-frequency amplifier 12 is connected to a first input bandpass 13 via the signal line 11.
  • the pass bandwidth of the first input passband is equal to or greater than the satellite signal bandwidth, so that the entire satellite signal transmitted from the satellite is transmitted through the first input passband 13.
  • the first input bandpass is connected via the first signal line 11 to a first mixer 14, which in turn is additionally connected via an electrical line to a local oscillator 30.
  • the local oscillator 30 generates a local oscillator signal having a local oscillator frequency.
  • the local oscillator frequency can be 10.2 GHz or even 10.5 GHz.
  • the mixer 14 mixes the local oscillator signal with the satellite signal and generates sum and difference frequencies.
  • the difference frequency of the satellite signal and the local oscillator signal are passed through by a first output bandpass filter 15 which is connected to the mixer 14 via the signal line 11.
  • the difference signal generated by the first mixer 14 is in the range of 500 MHz to 2550 MHz and is referred to as a (first) intermediate frequency signal.
  • the passband of the first output bandpass 15 is also located. Other frequencies are not passed by the first output bandpass 15.
  • the first output bandpass 15 is connected via the first signal line 11 to a first intermediate frequency amplifier 16, which amplifies the intermediate frequency signal. If the passband widths of the input passband 13 and the output passband 100% correspond to the satellite signal bandwidth, the amplified intermediate frequency signal has a bandwidth of 2.05 GHz and broadband is supplied via the signal line 11 to a broadband tuner 40.
  • the broadband tuner 40 which may be configured, for example, as a chip tuner 40, converts a transponder from the intermediate frequency position into a baseband signal. As a result, the broadband tuner 40 mixes the intermediate frequency signal down to the baseband signal, with the I and Q baseband signals extending over each half the transponder bandwidth.
  • the baseband signal is modulated and demodulated by a demodulator 50 connected to the broadband tuner 40 via the signal line 11. That from the demodulator
  • the output data signal is usually a so-called multi-program transport stream (MPTS), which includes several television programs.
  • MPTS multi-program transport stream
  • the data signal output by the demodulator 50 is supplied via the signal line 11 to an Ethernet interface 70, which may be designed, for example, as an Ethernet socket 70.
  • the signals thus converted are output from the feed system via the Ethernet interface 70 and can be received by a terminal via an Ethernet network. Consequently, a coaxial network is no longer necessary for the reception of television and / or radio programs.
  • the feed system according to the invention has only a single output interface 70.
  • FIG. 3 shows a block diagram of a feed system according to the invention according to a second embodiment.
  • the feed system comprises an orthomode transducer 2 whose operation has already been described above with reference to FIG FIG. 1 has been described.
  • the orthomode transducer 2 project two decoupling devices, namely a first decoupling pin 10 and a second decoupling pin 20.
  • first decoupling pin 10 electromagnetic waves of the satellite signal can be received, which are horizontally polarized.
  • the second decoupling pin 20 electromagnetic waves of the satellite signal can be received, which are vertically polarized.
  • the first decoupling pin 10 is connected to the first high-frequency amplifier 12 via the first signal line 11.
  • the second decoupling pin 20 is connected via a second signal line 21 to a second high-frequency amplifier 22.
  • the operations of the horizontal signal branch consisting of the first high frequency amplifier 12, the first input bandpass 13, the first mixer 14, the first output bandpass 15 and the first intermediate frequency amplifier 16, and the vertical signal branch comprising a second high frequency amplifier 22, a second input bandpass 23, a second mixer 24, a second output bandpass 25 and a second intermediate frequency amplifier 26 are identical. Both the signals from the horizontal signal branch and the signals from the vertical signal branch are respectively mixed by the first mixer 14 or the second mixer 24 with the local oscillator signal generated by the local oscillator 30.
  • the broadband tuner 40 Since there are two intermediate frequency signals which are transported via two signal lines 11, 21, the broadband tuner 40 additionally has a further input and a further output. Thus, the broadband tuner 40 is additionally connected to the second intermediate frequency amplifier 26 via the second signal line 21 and converts the second intermediate frequency signal into a second baseband signal.
  • the broadband tuner 40 may be realized in this case as a dual-chip tuner 40.
  • the two pair I and Q outputs of the broadband tuner 40 are connected to the two pairs of I, Q inputs of the demodulator.
  • the demodulator 50 is therefore also additional Connected to the broadband tuner 40 via a second pair of signal lines 21 and demodulates the second baseband signal to produce a second data signal.
  • the demodulator may be realized in this case as a so-called dual demodulator 50.
  • the dual demodulator 50 usually outputs an MPTS.
  • the demodulator 50 is connected to a back-end processor 60 via the first signal line 11 and the second signal line 21.
  • the back-end processor 60 converts or demultiplexes the multi-program transport stream into a so-called single-program transport stream (SPTS).
  • SPTS single-program transport stream
  • the data rate of the MPTS is usually about 50 Mbit / s, whereas the data rate of an SPTS is in the range of 6 to 16 Mbit / s depending on the transmitted TV program.
  • back-end processor 60 reduces the necessary data rate so that Ethernet resources or, more generally, network resources are optimally utilized.
  • the back-end processor 60 is in turn connected to the Ethernet interface 70 via a signal line.
  • FIG. 3 shown feed system can also be like that of the prior art and in FIG. 1 feed system processed satellite signals that broadband, for example, in a frequency range from 10.7 GHz to 12.75 GHz are emitted, and moreover, have both a horizontal signal component and a vertical signal component. however are for the corresponding signal processing by the invention and in FIG. 3 shown feed system much less electronic components necessary than in the known from the prior art feed system.
  • the feed system according to the invention two input bandpasses, two splitters, two mixers, a local oscillator, two output bandpass filters, two intermediate frequency amplifiers and three output interfaces can be saved in comparison to the known from the prior art feed system.
  • the feed system according to the invention consequently has a considerably reduced energy consumption.
  • a converter is arranged on a printed circuit board, wherein the in FIG. 1 shown feed system is occupied both sides of the housing with the circuit boards.
  • a corresponding feed system can not be extended due to the limited available space and due to the considerable heat generation by the plurality of electronic components.
  • the feed system according to the invention which in the FIGS. 2 and 3 is shown, has significantly fewer electronic components, so that one side of the housing is not occupied, so that on this page more electronic components, such as the broadband tuner 40, the demodulator 50 and the back-end processor 60 can be accommodated. Because of the broadband concept according to the invention, it is thus only possible to provide the functionality of television and / or radio programs in the converter housing itself to be converted accordingly, so that the signals can be output via an Ethernet interface 70.
  • the Ethernet interface 70 may comprise a so-called Ethernet PHY chip, which is adapted to adapt the data signals to the medium used for data exchange (eg twisted pair cable). Alternatively, however, a separate physical interface (PHY) may also be provided, which is arranged between the Ethernet interface 70 and the demodulator 50.
  • PHY physical interface

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  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
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  • Signal Processing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Claims (9)

  1. Système d'alimentation destiné à la réception de programmes radio et/ou télévisés émis par satellite et transmis à l'aide de signaux satellites qui sont constitués d'ondes électromagnétiques et émis par le satellite avec une largeur de bande de signal satellite, le système d'alimentation comprenant un guide d'onde (1) et un boîtier dans lequel sont agencés les composants suivants :
    - un dispositif de découplage (10) faisant saillie dans le guide d'onde (1) et permettant de recevoir un signal satellite émis par le satellite ;
    - un amplificateur de hautes fréquences (12) destiné à l'amplification du signal satellite et connecté au dispositif de découplage (10) par le biais d'une ligne de signaux (11) ;
    - un filtre passe-bande d'entrée (13) et un filtre passe-bande de sortie (15) qui sont connectés en série à l'amplificateur de hautes fréquences (12) par le biais de la ligne de signaux (11), le filtre passe-bande d'entrée (13) et le filtre passe-bande de sortie (15) présentant chacun une largeur de bande passante ;
    - il est en outre prévu un dispositif de conversion de fréquence, par le biais duquel les signaux satellites peuvent être convertis en signaux de fréquence intermédiaire ;
    - un amplificateur de fréquence intermédiaire (16) destiné à l'amplification du signal de fréquence intermédiaire et connecté au filtre passe-bande de sortie (15) par le biais de la ligne de signaux (11) ;
    - il est en outre prévu, dans le boîtier, un syntoniseur (40) connecté à l'amplificateur de fréquence intermédiaire (16) par le biais de la ligne de signaux (11), lequel convertit le signal de fréquence intermédiaire en un signal de bande de base ;
    - le boîtier contient également un démodulateur (50) qui est connecté au syntoniseur (40) par le biais de la ligne de signaux (11) et est destiné à démoduler le signal de bande de base et à produire un signal de données ; et
    - le boîtier contient également une interface Ethernet (70) qui est connectée au démodulateur (50) par le biais de la ligne de signaux (11) et est destinée à l'échange de signaux de données ;
    - les largeurs de bande passante du filtre passe-bande d'entrée (13) et du filtre passe-bande de sortie (15) sont de taille égale ou supérieure à la largeur de bande de signal satellite, celle-ci étant de 2,05 GHz ;
    - le syntoniseur est conçu en tant que syntoniseur à large bande (40) pour traiter les signaux dans la largeur de bande passante ;
    - le dispositif de conversion de fréquence comprend un oscillateur local (30) qui produit un signal d'oscillateur local avec une fréquence d'oscillateur local ;
    - le dispositif de conversion de fréquence comprend en outre un mélangeur (14) qui est disposé entre le filtre passe-bande d'entrée (13) et le filtre passe-bande de sortie (15) et est connecté à ceux-ci par le biais de la ligne de signaux (11), le mélangeur (14) étant en outre connecté à l'oscillateur local (30) afin de mélanger le signal satellite au signal d'oscillateur local et de produire un signal de fréquence intermédiaire ;
    - le système d'alimentation est alimenté électriquement par le biais de l'interface Ethernet (70).
  2. Système d'alimentation selon la revendication 1, caractérisé en ce que le syntoniseur à large bande (40) est conçu de manière à convertir en signal de base un signal de fréquence intermédiaire de transpondeur émis par l'amplificateur de fréquence intermédiaire (16) et à produire des signaux I et Q qui présentent de préférence chacun la moitié de la largeur de bande passante.
  3. Système d'alimentation selon la revendication 1 ou 2, caractérisé en ce que le boîtier contient en outre les composants suivants :
    - un deuxième dispositif de découplage (20) faisant saillie dans le guide d'onde (1), au moyen duquel peuvent être reçues des ondes électromagnétiques du signal satellite émises dans un deuxième plan de polarisation ;
    - un deuxième amplificateur de haute fréquence (22) destiné à amplifier le signal satellite et connecté au deuxième dispositif de découplage (20) par le biais d'une deuxième ligne de signaux (21) ;
    - un deuxième filtre passe-bande d'entrée (23) et un deuxième filtre passe-bande de sortie (25) qui sont connectés en série au deuxième amplificateur de haute fréquence (22) par le biais de la deuxième ligne de signaux (21), le deuxième filtre passe-bande d'entrée (23) et le deuxième filtre passe-bande de sortie (25) présentant chacun une largeur de bande passante faisant au moins 70 % de la largeur de bande de signal satellite ;
    - un deuxième mélangeur (24) qui est disposé entre le deuxième filtre passe-bande d'entrée (23) et le deuxième filtre passe-bande de sortie (25) et est connecté à ceux-ci par le biais de la deuxième ligne de signaux (21), le deuxième mélangeur (24) étant en outre connecté à l'oscillateur local (30) afin de mélanger le signal satellite au signal d'oscillateur local et de produire un deuxième signal de fréquence intermédiaire ; et
    - un deuxième amplificateur de fréquence intermédiaire (26) destiné à l'amplification du deuxième signal de fréquence intermédiaire et connecté au deuxième filtre passe-bande de sortie (25) par le biais de la deuxième ligne de signaux (21),
    le système d'alimentation présentant les caractéristiques suivantes :
    - le syntoniseur à large bande (40) est en outre connecté au deuxième amplificateur de fréquence intermédiaire (26) par le biais de la deuxième ligne de signaux (21) et le syntoniseur à large bande (40) convertit le deuxième signal de fréquence intermédiaire en un deuxième signal de bande de base ;
    - le démodulateur (50) est en outre connecté au syntoniseur à large bande (40) par le biais de la deuxième ligne de signaux (21) afin de démoduler le deuxième signal de bande de base et de produire un deuxième signal de données ; et
    - l'interface Ethernet (70) est en outre connectée au démodulateur (50) par le biais de la deuxième ligne de signaux (21) en vue de l'échange des deuxièmes signaux de données.
  4. Système d'alimentation selon la revendication 3, caractérisé en ce que les largeurs de bande passante du deuxième filtre passe-bande d'entrée (23) et du deuxième filtre passe-bande de sortie (25) sont de taille égale ou supérieure à la largeur de bande de signal satellite.
  5. Système d'alimentation selon l'une des revendications 3 et 4, caractérisé en ce que le système d'alimentation comprend en outre un transducteur orthomode (2) destiné à la décomposition du signal satellite en une composante à polarisation horizontale et une composante à polarisation verticale.
  6. Système d'alimentation selon la revendication 1 ou 2, caractérisé en ce que le système d'alimentation comprend en outre un processeur principal (60) qui est disposé entre le démodulateur (50) et l'interface Ethernet (70) et qui est connecté à ceux-ci, le processeur principal (60) étant conçu pour démultiplexer le signal de données en flux de transport de données.
  7. Système d'alimentation selon l'une des revendications 3 à 5, caractérisé en ce que le système d'alimentation comprend en outre un processeur principal (60) qui est disposé entre le démodulateur (50) et l'interface Ethernet (70) et qui est connecté à ceux-ci, le processeur principal (60) étant conçu pour démultiplexer le signal de données et le deuxième signal de données en flux de transport de données.
  8. Système d'alimentation selon l'une des revendications 1 à 7, caractérisé en ce que le système d'alimentation comprend en outre un commutateur qui est disposé entre le processeur principal (60) et l'interface Ethernet (70) et qui est connecté à ceux-ci, le commutateur étant conçu pour regrouper les flux de transport de données en un flux de transport de données global.
  9. Système d'alimentation selon l'une des revendications précédentes, caractérisé en ce que le système d'alimentation comprend en outre une interface physique qui est disposée entre le démodulateur (50) et l'interface Ethernet (70) et qui est connectée à ceux-ci, l'interface physique étant conçue pour adapter les signaux de données à un support de transmission servant à l'échange de données.
EP13000877.4A 2012-02-29 2013-02-21 Système d'alimentation, en particulier destiné à la réception de programmes radio et/ou télévisés émis par satellite Active EP2634936B1 (fr)

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CN109068076A (zh) * 2018-10-11 2018-12-21 珠海佳讯创新科技股份有限公司 通过同轴电缆传送和分发Ku波段卫星信号的高频调谐器

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EP1944864A2 (fr) * 2007-01-09 2008-07-16 Rohde & Schwarz GmbH & Co. KG Convertisseur de fréquence

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US20020154055A1 (en) * 2001-04-18 2002-10-24 Robert Davis LAN based satellite antenna/satellite multiswitch
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JP2006165652A (ja) * 2004-12-02 2006-06-22 Funai Electric Co Ltd デジタル放送受信システム及びそれに用いられる屋外装置
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DE10124691A1 (de) * 2001-05-18 2002-11-21 Bktel Comm Gmbh Fernstromversorgungs-und Kommunikationssystem
EP1944864A2 (fr) * 2007-01-09 2008-07-16 Rohde & Schwarz GmbH & Co. KG Convertisseur de fréquence

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