EP2018722A1 - Dispositif pour envoyer et recevoir des données et procédé pour faire fonctionner ce dispositif - Google Patents

Dispositif pour envoyer et recevoir des données et procédé pour faire fonctionner ce dispositif

Info

Publication number
EP2018722A1
EP2018722A1 EP06742905A EP06742905A EP2018722A1 EP 2018722 A1 EP2018722 A1 EP 2018722A1 EP 06742905 A EP06742905 A EP 06742905A EP 06742905 A EP06742905 A EP 06742905A EP 2018722 A1 EP2018722 A1 EP 2018722A1
Authority
EP
European Patent Office
Prior art keywords
optical
electrical
converter unit
antenna
unit
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.)
Withdrawn
Application number
EP06742905A
Other languages
German (de)
English (en)
Inventor
Harald Rohde
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.)
Sagemcom Broadband SAS
Original Assignee
Gigaset Communications GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gigaset Communications GmbH filed Critical Gigaset Communications GmbH
Publication of EP2018722A1 publication Critical patent/EP2018722A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25752—Optical arrangements for wireless networks
    • H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
    • H04B10/25759—Details of the reception of RF signal or the optical conversion before the optical fibre

Definitions

  • the invention relates to a device for transmitting and receiving data
  • This device is, for example, a so-called antenna head for "optical radio” applications, which are explained in more detail below.
  • the optical / electrical conversion unit converts optical signals into electrical signals.
  • the frequency of an optical carrier radiation is, for example, in the frequency range from 187 terahertz to 1 petahertz or has a wavelength in the
  • a radio signal is modulated onto the optical radiation.
  • the radio signal has, for example, one or more carrier frequencies in the range from 3 megahertz to 100 gigahertz or higher, in particular in the range from 1 gigahertz to 60 gigahertz.
  • the radio signal is a mobile radio signal or a wireless local area network (WLAN) signal.
  • WLAN wireless local area network
  • the electric / optical converter unit converts an electrical signal in the aforementioned frequency range into an optical signal of said optical frequency range.
  • the antenna unit is tuned to the carrier frequency of the radio frequency in their design.
  • the device would then be expensive to manufacture, for example, if both converter units are realized in a single component, in particular in one Semiconductor device of monocrystalline inorganic material.
  • the device should operate independently of a supply voltage or with a small supply voltage, in particular less than 5 volts or less than 1 volt.
  • the invention is based on the consideration that the device can then be easily manufactured if both converter units are spatially and functionally separated from each other. In particular, it is then possible to use, for each converter unit, independently of the other converter unit, such converter units which have a high degree of efficiency for the respective conversion direction.
  • the invention is based on the consideration that, in particular, a passive operation or a operation with a small supply voltage enables a simply constructed device, because no additional power supply has to be provided, i. In particular, no power supplies, no batteries or rechargeable batteries or similar power supplies.
  • the device contains no external supply voltage. Consequently, the energy for operation is obtained only from the incoming light or from the incoming electromagnetic radiation. Circuit complexity for generating a supply voltage is therefore not required. Also eliminates maintenance for servicing power supplies. Therefore, in a development of the device for the electrical / optical converter unit, a polymer erodulator is used. Polymer modulators allow only the conversion of electrical signals into optical signals. Polymers are macromolecules having molecular weights of example Ie. Greater than 10 4 gmol '1. In particular, organic polymers or other polymers are used. For example, uses a polymer modulator, the e lectric field-oriented or so-called poled polymers.
  • Polymer modulators can be compared to single-crystal semiconductor devices in a much simpler way and thus produce more cost-effective.
  • polymer modulators allow passive operation. This results in an antenna head or a device for transmitting and receiving data, which can be produced simply and inexpensively.
  • new application areas are economically feasible, for example, the construction of a plurality of so-called picocells, i. of radio cells with a receiver or transmitter diameter of less than 35 meters.
  • the electrical / optical converter unit is a modulator which works with interferences, in particular a Mach-Zehender modulator.
  • the interferences are caused by differences in transit time in two optical transmission links. Laser light is particularly suitable for generating pronounced interference.
  • the electrical / optical converter unit (14, 14a) is an electroabsorption modulator.
  • the electroabsorption modulator is based on the Franz Keldysh effect or its reversal.
  • a diode as an optical / electrical converter unit in addition to an electrical / optical electroabsorption modulator offers the possibility of constructing a passive antenna head, which has numerous advantages, for example with regard to the efficiency of the optical / electrical conversion or with regard to avoiding mutual influence of the two types of conversion.
  • the electric / optical converter unit contains further elements, e.g. Filter.
  • the optical / electrical conversion unit may also contain other units, e.g. Filter.
  • the optical / electrical converter unit is an optical diode, in particular a photodiode.
  • optical diodes which use semiconductors with direct band transitions between conduction band and valence band, i. for example, silicon diodes.
  • semiconductor diodes which use semiconductors with direct band transitions between conduction band and valence band, i. for example, silicon diodes.
  • diodes with p / n junctions and diodes with pin junctions p-doped, intrinsic-doped, n-doped
  • comparatively expensive components based on compound semiconductors or semiconductors with indirect transitions between bands need not be used. with a transition in which not only the energy of an electron or so-called "hole” but also its momentum changes.
  • the antenna is connected to a circulator unit or to a directional coupler unit.
  • a circulator unit or a directional coupler unit By using a circulator unit or a directional coupler unit, a single antenna per device can be used so that, depending on the antenna used, costs may be incurred can be saved. Undesired feedbacks are avoided in a simple way by using the circulator unit or directional coupler unit.
  • the circulator unit or the directional coupler unit also operates passively, i. it has no external supply voltage connections.
  • the overall device remains electrically passive.
  • the device includes a connector suitable for connecting an optical fiber over which data in both directions, i. be transmitted bidirectionally.
  • the device includes two connection devices for connecting two optical fibers.
  • the connection devices are in a next development part of a screw, i. they have an internal thread or an external thread.
  • the optical fibers can be easily and securely connected to the device.
  • the invention also relates to a method for operating the device according to the invention.
  • data is transmitted to the terminals of different networks of different network standards via the device in accordance with a multiplex method.
  • Suitable multiplexing methods are, in particular, time-division multiplexing, frequency division multiplexing, code division, etc.
  • data for terminals are transmitted to at least two, at least three or according to all of the following network standards: DECT (Digital Enhanced Cordless Telecommunication),
  • WLAN Wireless Local Area Network
  • WiFi Wireless Local Area Network
  • passive filters are used in the device, for example. Also suitable antennas are connected in parallel for the different standards.
  • an antenna head for passive "Optical Radio” applications is specified.
  • the generic term "optical radio” refers to technologies in which some or all of the signals to be transmitted, either in baseband or in the radio frequency band, are transmitted via an optical fiber, e.g. a glass fiber or a polymer fiber.
  • an optical fiber e.g. a glass fiber or a polymer fiber.
  • the radiated RF energy can come here directly from the light and the received RF signal can directly re-modulate the light, for example, on a different frequency, so that passive antenna heads are possible, which only a fiber optic or Plastic water are connected.
  • An application is, for example, the supply of radio picocells in a building by means of a wireless data transmission network.
  • the problems encountered in the realization of such antenna heads relate to future technologies, so that it is not easy to fall back on previously known solutions.
  • the antenna head for example, on a polymer wafer or polymer chip integrated.
  • the light of the "Downstream Optical Fiber" is split into two parts via a beam splitter; one part is converted into an electrical signal with a photodiode attached to the polymer chip, and the other part passes through a polymer modulator powered by the received radio signals sent by, for example, mobile devices.
  • a polymer modulator powered by the received radio signals sent by, for example, mobile devices.
  • an electrical circulator separates the RF upstream and the RF downstream.
  • FIG. 2 shows a passive antenna head with separate transmitting antenna and separate receiving antenna
  • FIG. 3 shows a passive antenna head with connection to a single glass fiber
  • FIG. 4 shows pico cells arranged in a building realized with passive antenna heads.
  • FIG. 1 shows a passive antenna head 10 which contains a polymer chip 12 with polymer converter 14.
  • the antenna head 10 includes a photodiode 16, a circulator 18 and a transmitting and receiving antenna 20, which are also integrated, for example, on the polymer chip 12 in hybrid construction.
  • An incoming optical fiber 22 is coupled via a connecting device 24, for example a screw connection, to an optical conductor 26 integrated on the polymer chip 12.
  • the optical conductor 26 leads from the connecting device 24 to a branch 28, for example to a beam splitter.
  • An optically conductive section 30 leads from the branch 28 to an inlet of the polymer transducer 14.
  • An optically conductive section 32 leads from the branch 28 to a light outlet 33.
  • the sections 30 and 32 are likewise located on the pole. lymerchip 12 integrated.
  • the light outlet 33 faces an active surface of the photodiode 16, so that the light emerging from the outlet 33 impinges on the photodiode 16 and generates there a voltage or a current.
  • An optical conductor 34 is also integrated on the polymer chip 12 and leads from an output of the polymer transducer 14 to a connector 36, e.g. to a screw connection. Connected to the connection device 36 is a path-leading optical fiber 38, which passes on the light emerging from the polymer modulator 14.
  • connection 40 leads from a terminal of the photodiode 16 to an input Zl of the circulator 18.
  • the connection 40 is an electrically conductive connection, a microwave line, a stripline, etc.
  • a connection 42 is located between a terminal Z2 of the circulator 18 and the transmitting and receiving antenna 20. The port Z2 of the circulator 18 is operated as an input and as an output.
  • a connection 44 is located between an output Z3 of the circulator 18 and a port 46. Between the port 46 and a control input of the polymer converter 14 is another connection 48.
  • the connections 42, 44 and 48 are constructed like the connection 40.
  • the circulator 18 contains, for example, a premagnetized ferrite, which causes high-frequency signals from the input Zl to the terminal Z2 and from there to the antenna 20 arrive. On the other hand, signals coming from the antenna 20 to the port Z2 are forwarded by the circulator 18 to the output Z3. Thus, no signals from the input Zl reach the output Z3. Instead of the circulator 18, it is also possible to use a directional coupler, in which no signals are forwarded from Z3 to Z1, as would be the case with a circulator.
  • FIG. 2 shows an antenna head 10a which, apart from the differences explained below, such as the antenna head 10, is built. Parts having the same structure are given the same reference numeral, but with the parts of the antenna head 10a being replaced by the lower case letter "a", see, for example, polymer transducer 14a compared to the polymer transducer 14.
  • the antenna head 10a has the antenna head 10a instead of the transmitting and receiving antenna 20 a separate transmitting antenna 60 which is connected via a connection 62 to a terminal of the photodiode 16a.
  • the antenna head 10a has a receiving antenna 64 which is connected via a connection 66 to a terminal 46a having the same function as the terminal 46. Thus, no circulator is present in the antenna head 10a.
  • FIG. 3 shows a passive antenna head 10b, which is constructed in the same way as the antenna head 10 or alternatively as the antenna head 10a, except for the differences explained below. Parts with the same structure and thus with the same function are given the same reference numerals, but the parts of the antenna head 10b are replaced by the lowercase letter "b", see, for example, polymer converter 14b in comparison to the polymer converter 14 or 14a.
  • the antenna head 10b differs from the antenna head 10 or 10a in that only one optical fiber 80 is connected to it, over the light bidirectionally, i. is transmitted in both transmission directions.
  • the optical fiber 80 is attached to a connector 84, e.g. a screw connection, coupled.
  • connection device 84 integrated into a polymer chip 12b, which corresponds to the polymer chip 12 or 12a, an optical conductor 82 leads to a branch 86. From the branch 86, a section 88 leads to a light outlet 33b, which leads to the light outlet 33 or 33a corresponds, ie leads to a photodiode, not shown in Figure 3.
  • a portion 90 lies between the branch 86 and an optical port of the polymer modulator 14b.
  • the polymer modulator 14b has only one optical connection. This can be achieved, for example, by mirroring a side surface of the polymer module. reach sector 14b. From a connection 46b, which corresponds to the connection 46 or 46a, a connection 48b leads to a control connection of the polymer modulator 14b.
  • the connection 48b is, for example, electrically conductive, a microwave line or a stripline, etc.
  • the polymer converter 14b has a somewhat more complicated structure.
  • All three antenna heads 10, 10a and 10b operate without supply voltage, i. passive.
  • An application example for the antenna heads 10, 10a and 10b will be explained in more detail below with reference to FIG.
  • MIMO antenna arrangements multiple input, multiple output.
  • the three antenna heads 10, 10a and 10b can each be completely integrated, for example by means of a hybrid technique.
  • the antenna or the antennas are not integrated with but manufactured as a separate component.
  • the polymer chips 12, 12a, 12b are produced separately from the other units of the antenna head 10, 10a or 10b and optionally encapsulated separately.
  • the antenna head 10, 10a and 10b as electrical / optical transducer unit 14, 14a and 14b, respectively, an electroabsorption modulator, which is basically also suitable as an optical / electrical converter, but compared to a diode 16, 16a a smaller efficiency at the conversion has.
  • the antenna head 10, 10a or 10b is in particular a passive antenna head 10, 10a or 10b.
  • FIG. 4 shows picocells arranged in a building 100, namely rooms 102, 104, 106 and 108, in each of which a passive antenna head 112, 114, 116 and 118 is arranged, which has a structure as the antenna head 10, 10a and 10b.
  • the antenna heads of the rooms of a floor are connected via optical transverse lines.
  • a cross-line 122 connects the antenna heads 112 and 114 of the first floor.
  • a transverse line 124 connects the antenna heads 116 and 118 of the second floor.
  • the transverse lines 122 and 124 are connected via a main line 120.
  • Main 120 and transverse lines 122 and 124 are optical fiber lines, e.g. Glass fibers or plastic fibers.
  • the main line 120 leads to a base unit 130 which, for example, performs the function of a WLAN station or the function of a mobile radio base station.
  • the base unit 130 performs both the function of a WLAN base unit and the function of a UMTS base station.
  • the data of the various standards are multiplexed over the optical lines 120 to 124.
  • a mobile device 132 can transmit and receive data in the space 108 via the antenna head 118, see data transmission path 136.
  • a portable computer 134 which receives data via a data transmission link 138, which are transmitted in a WLAN data transmission network .
  • data of various data transmission networks including the antenna heads 112 and 114 can be received or transmitted.
  • the antenna heads 112 to 118 are passive, a multiplicity of so-called picocells, ie transmission / reception ranges with maximum diameters of less than 35 m, can be constructed in a cost-effective manner.
  • picocells offers a multitude of advantages compared to central antenna stations, for example with regard to radiation exposure, with regard to the use of frequencies, etc.
  • the antenna heads 10, 10a, 10b are active, ie there is an additional operating voltage supply unit, eg with battery, with battery or with power supply.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un dispositif (10) comprenant une unité de conversion optique/électrique (16), une unité de conversion électrique/optique (14) et une antenne (20). Ce dispositif (10) comprend par ailleurs un modulateur polymère (14). Le dispositif selon l'invention se présente en particulier sous la forme d'un dispositif passif.
EP06742905A 2006-05-12 2006-05-12 Dispositif pour envoyer et recevoir des données et procédé pour faire fonctionner ce dispositif Withdrawn EP2018722A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/004497 WO2007131519A1 (fr) 2006-05-12 2006-05-12 Dispositif pour envoyer et recevoir des données et procédé pour faire fonctionner ce dispositif

Publications (1)

Publication Number Publication Date
EP2018722A1 true EP2018722A1 (fr) 2009-01-28

Family

ID=37622483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06742905A Withdrawn EP2018722A1 (fr) 2006-05-12 2006-05-12 Dispositif pour envoyer et recevoir des données et procédé pour faire fonctionner ce dispositif

Country Status (3)

Country Link
US (1) US20090116843A1 (fr)
EP (1) EP2018722A1 (fr)
WO (1) WO2007131519A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4020845A4 (fr) * 2019-09-27 2022-11-16 Comba Network Systems Company Limited Machine distante de communication rof et système rof

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EP2330757A1 (fr) 2009-12-07 2011-06-08 BRITISH TELECOMMUNICATIONS public limited company Connecteur sans fil
FR2958481A1 (fr) 2010-03-30 2011-10-07 France Telecom Procede de traitement d'une demande de transmission d'un signal radio dans un systeme rof

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NZ332463A (en) * 1996-07-19 2000-09-29 British Telecomm Telecommunications system simultaneously receiving and modulating an optical signal using electro-absorption modulator
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4020845A4 (fr) * 2019-09-27 2022-11-16 Comba Network Systems Company Limited Machine distante de communication rof et système rof
US11909443B2 (en) 2019-09-27 2024-02-20 Comba Network Systems Company Limited ROF communication remote machine and ROF system

Also Published As

Publication number Publication date
WO2007131519A1 (fr) 2007-11-22
US20090116843A1 (en) 2009-05-07

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