EP0997977A1 - Atténuateur de liaison radio pour adaptateur d'antenne de terminal integré - Google Patents

Atténuateur de liaison radio pour adaptateur d'antenne de terminal integré Download PDF

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Publication number
EP0997977A1
EP0997977A1 EP99308180A EP99308180A EP0997977A1 EP 0997977 A1 EP0997977 A1 EP 0997977A1 EP 99308180 A EP99308180 A EP 99308180A EP 99308180 A EP99308180 A EP 99308180A EP 0997977 A1 EP0997977 A1 EP 0997977A1
Authority
EP
European Patent Office
Prior art keywords
adapter terminal
attenuation device
panel
absorbent material
box
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Withdrawn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
EP99308180A
Other languages
German (de)
English (en)
Inventor
Manuel Perez
Eric Renier
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.)
TRT Lucent Technologies SA
Original Assignee
TRT Lucent Technologies SA
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
Priority claimed from EP98460047A external-priority patent/EP0997976A1/fr
Application filed by TRT Lucent Technologies SA filed Critical TRT Lucent Technologies SA
Priority to EP99308180A priority Critical patent/EP0997977A1/fr
Publication of EP0997977A1 publication Critical patent/EP0997977A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial

Definitions

  • the present invention concerns a radio link attenuator for an integrated antenna adapter terminal and can be applied in particular in the field of cordless communication networks functioning with the DECT standard.
  • a cordless network generally comprises a plurality of adapter terminals commonly known in technical language as CTAs (Cordless Adapter Terminal) provided to firstly communicate via a radio link with a base station in relation with the traditional telephone network, and secondly with subscriber terminals (digital or analog telephones, modems, ISDN interface, DECT handsets) via a radio or wire link.
  • CTAs Cordless Adapter Terminal
  • subscriber terminals digital or analog telephones, modems, ISDN interface, DECT handsets
  • the installer When putting into service a radio link between an adapter terminal and its base station, the installer needs to check, not only the proper functioning of the link, but also guarantee the customer with an operating margin of several decibels so as to be able to deal with any possible bad atmospheric conditions.
  • This operating margin is typically 8 decibels.
  • the installer when checking the link, the installer generally introduces an attenuator between the antenna and the transmitter/receiver of the adapter terminal. This operation is simple when the antenna of the adapter terminal is offset outside the latter.
  • the antenna when it is integrated in the adapter terminal, that is when it is placed inside the box of the adapter terminal or when it forms an integral part of this box, it may prove to be impossible to do this owing to lack of space.
  • the adapter terminals are increasingly compact.
  • the operation for mounting or disassembling the adapter terminal so as to place the attenuator inside the box of the terminal may prove to be a delicate one, as the adapter terminals are generally placed on pylon tops.
  • the aim of the invention is also to offer an attenuator having a simple design making it possible to verify the operating margin of a link using adapter terminals with an integrated antenna.
  • an attenuator is used placed outside the box of the adapter terminal between its antenna and the associated base station.
  • the invention also concerns an attenuation device to be used when putting into service a radio link between a base station and an integrated antenna adapter terminal so as to check the operating margin of said link, characterised in that it appears in the form of a panel made of an absorbent material to be disposed able to move outside the box of the adapter terminal between the antenna and the base station.
  • Said panel made of an absorbent material is composed of epoxy loaded with carbon or iron balls.
  • the panel made of an absorbent material is preferably housed in a frame fitted with hooking means.
  • Figure 1 represents a radio link between a radio base station RBS and an adapter terminal CTA.
  • the adapter terminal is mainly composed of an antenna ANT, a transmitter/receiver E/R and a subscriber interface INT, the entire unit being placed in a box.
  • the antenna is placed inside the box.
  • the device of the invention is also particularly advantageous when the antenna forms an integral part of the box.
  • the subscriber interface INT is connected to one or several subscriber terminals. In the example of figure 1, the subscriber interface is connected to a telephone station T.
  • the adapter terminal CTA When putting this link into service, the adapter terminal CTA is fitted with an attenuation device AT for attenuating the signals originating from or going to the base station so as to guarantee a functioning margin of the radio link.
  • this attenuation device is placed outside the adapter terminal CTA between its antenna and the radio base station RBS.
  • This attenuation device is mainly composed of a panel P made of an absorbent material, namely epoxy powder loaded with carbon or iron balls.
  • the panel P is preferably coated with a non-conducting plastic material so as to protect it from bad weather conditions.
  • the attenuation device of the invention preferably comprises a frame C used as a support for the panel made of an absorbent material and fitted with hooking means to hook the attenuation device AT to the box of the adapter terminal CTA.
  • the hooking means are composed of a latching block PE intended to be placed on the upper face of the box of the terminal CTA, one end being fixed to the frame C and the other having a curved section placed against the rear face of the box when the attenuator is in position.
  • FIG 3. A further embodiment of the hooking means is shown on figure 3. They appear in the form of elements forming slides G on the sides of the frame C of the attenuator. Additional means F (apertures fitted in the lateral faces of the box of the terminal) are provided on the adapter terminal CTA.
  • the attenuation device may further comprise a coupling element (not shown on the figures) for placing said device on the box of the CTA with the aid of a pole when said box is positioned on the top of a pylon.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Telephone Set Structure (AREA)
EP99308180A 1998-10-27 1999-10-18 Atténuateur de liaison radio pour adaptateur d'antenne de terminal integré Withdrawn EP0997977A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99308180A EP0997977A1 (fr) 1998-10-27 1999-10-18 Atténuateur de liaison radio pour adaptateur d'antenne de terminal integré

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP98460047A EP0997976A1 (fr) 1998-10-27 1998-10-27 Atténuateur de liaison radio pour terminal d'adaptation à antenne intégrée
EP98460047 1998-10-27
EP99308180A EP0997977A1 (fr) 1998-10-27 1999-10-18 Atténuateur de liaison radio pour adaptateur d'antenne de terminal integré

Publications (1)

Publication Number Publication Date
EP0997977A1 true EP0997977A1 (fr) 2000-05-03

Family

ID=26151807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99308180A Withdrawn EP0997977A1 (fr) 1998-10-27 1999-10-18 Atténuateur de liaison radio pour adaptateur d'antenne de terminal integré

Country Status (1)

Country Link
EP (1) EP0997977A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1130681A3 (fr) * 2000-03-03 2004-06-30 Alcatel Canada Inc. Système de radiocommunications utilisant des atténuateurs pour une antenne
JP2012205028A (ja) * 2011-03-25 2012-10-22 Casio Comput Co Ltd 感度調整装置及び無線通信機器
JP2012205027A (ja) * 2011-03-25 2012-10-22 Casio Comput Co Ltd 感度調整装置、無線通信機器及び腕時計
US20140287772A1 (en) * 2011-02-03 2014-09-25 Realcell Limited System and method for locating a cellular communication device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010569A1 (fr) * 1988-04-19 1989-11-02 Home Box Office Inc. Procede et appareil de determination des parametres d'une station terrestre, tels que la marge de pluie, a l'aide de tampons d'attenuation
EP0449107A2 (fr) * 1990-03-27 1991-10-02 Ferguson Limited Unité d'antenne À  micro-ondes
US5151222A (en) * 1991-08-26 1992-09-29 Mcdonnell Douglas Corporation Foam absorber
WO1994018817A1 (fr) * 1993-02-15 1994-08-18 Increa Oy Dispositif de radiocommunication
US5805667A (en) * 1997-01-02 1998-09-08 Lucent Technologies Inc. Apparatus for range-testing cordless communication devices and method of operation thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010569A1 (fr) * 1988-04-19 1989-11-02 Home Box Office Inc. Procede et appareil de determination des parametres d'une station terrestre, tels que la marge de pluie, a l'aide de tampons d'attenuation
EP0449107A2 (fr) * 1990-03-27 1991-10-02 Ferguson Limited Unité d'antenne À  micro-ondes
US5151222A (en) * 1991-08-26 1992-09-29 Mcdonnell Douglas Corporation Foam absorber
WO1994018817A1 (fr) * 1993-02-15 1994-08-18 Increa Oy Dispositif de radiocommunication
US5805667A (en) * 1997-01-02 1998-09-08 Lucent Technologies Inc. Apparatus for range-testing cordless communication devices and method of operation thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1130681A3 (fr) * 2000-03-03 2004-06-30 Alcatel Canada Inc. Système de radiocommunications utilisant des atténuateurs pour une antenne
US6816739B1 (en) 2000-03-03 2004-11-09 Alcatel Canada Inc. Radio system attenuator for an antenna
US20140287772A1 (en) * 2011-02-03 2014-09-25 Realcell Limited System and method for locating a cellular communication device
US9544722B2 (en) * 2011-02-03 2017-01-10 Realcell Limited System and method for locating a cellular communication device
JP2012205028A (ja) * 2011-03-25 2012-10-22 Casio Comput Co Ltd 感度調整装置及び無線通信機器
JP2012205027A (ja) * 2011-03-25 2012-10-22 Casio Comput Co Ltd 感度調整装置、無線通信機器及び腕時計

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