EP0685901A2 - Structure de source pour utilisation dans un système de communication sans fil - Google Patents

Structure de source pour utilisation dans un système de communication sans fil Download PDF

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Publication number
EP0685901A2
EP0685901A2 EP95303494A EP95303494A EP0685901A2 EP 0685901 A2 EP0685901 A2 EP 0685901A2 EP 95303494 A EP95303494 A EP 95303494A EP 95303494 A EP95303494 A EP 95303494A EP 0685901 A2 EP0685901 A2 EP 0685901A2
Authority
EP
European Patent Office
Prior art keywords
lens
feed structure
slot
substrate
edge
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Withdrawn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
EP95303494A
Other languages
German (de)
English (en)
Inventor
Noach Amitay
Michael J. Gans
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.)
AT&T Corp
Original Assignee
AT&T Corp
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Filing date
Publication date
Application filed by AT&T Corp filed Critical AT&T Corp
Publication of EP0685901A2 publication Critical patent/EP0685901A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H01Q13/085—Slot-line radiating ends
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path

Definitions

  • the present invention relates to feed structures for wireless communication systems.
  • the present invention is more particularly directed to a specific feed structure arrangement for generating a plurality of narrow scannable beams.
  • WHSICS wireless high speed indoor communications systems
  • Beams having a beamwidth of approximately 15° or less have been found to be most effective for this purpose.
  • the basic architecture of such WHSICS consists of a community of wireless subscribers communicating between themselves and/or others on a general network through a central base station.
  • One way of obtaining a narrow scannable beam is by employing phased array antennas either at the base station, at the subscribers' terminals or, most preferably, at both the base station and the subscriber terminals.
  • phased array antennas significantly adds to the cost of such WHSICS.
  • An alternative to phased array antennas is to form a multitude of narrow beams (each with a beamwidth of approximately 15° or less) and to switch between the narrow beams to determine a suitable transmission and reception path.
  • Multiple beams may be generated using multiple horn feeds (i.e. one beam per horn feed) and, when used in WHSICS wherein a hemispherical scan region is required, the beams are arranged to span a hemisphere through the use of a spherical lens.
  • the use of multiple horn feeds --which are bulky and expensive -- arranged about a spherical lens not only adds to the size of the overall WHSICS but, in addition, significantly increases the cost of the system. Accordingly, it would be desirable to have a compact and readily manufacturable feed structure capable of generating a plurality of narrow beamwidth beams for use in WHSICS.
  • the present invention is accordingly directed to an advantageously configured feed structure for use in a wireless communication system.
  • the feed structure comprises a dielectric substrate having an upper surface, a lower surface and an edge, a conductive layer disposed on the lower surface, and a plurality of slot radiators formed within the conductive layer. Each slot radiator has a wide end positioned at the edge of the substrate and a narrow end.
  • the feed structure also includes means disposed on the upper surface of the substrate and responsive to a control signal for selectively directing a main signal to the narrow end of a selected one of the slot radiators so that, when the control signal is applied, a beam of radiant energy is caused to propagate from the wide end of the selected slot radiator.
  • a plurality of the inventive feed structures are provided in conjunction with a constant dielectric spherical lens for operative use in determining a most desired or suitable transmission and receiving path for a data signal.
  • the feed structures so employed have an edge conformed to fit the curvature of the lens.
  • the feed structure 10 includes a substrate 12 constructed from a dielectric material such as a synthetic polymer resin, e.g. polytetraflouroethelyne (PTFE), and having an upper face or surface 14, a lower face or surface 16 and an edge 18 defined between the upper and lower surfaces and configured in a predetermined shape or contour as more fully discussed below.
  • the lower surface 16 of the substrate 12 has a thin layer of conductive material, such as copper, disposed thereon and in which six separate slot radiators 20a - 20f are etched in a manner well known to those of ordinary skill in the art.
  • each slot radiator 20 has a wide end 22 coterminous with the edge 18, and a narrow end 24.
  • the width of each slot radiator 20 is designed to operatively emit a beam having a predetermined narrow beamwidth.
  • the upper surface 14 of the feed structure 10 contains a directing means comprised of a plurality of diodes 32a - 32f, the cathode of each being connected to an input bus 36 and the anode of each being connected to a respective designated conducting line 33a - 33f.
  • Each conducting line 33 is disposed in conducting relation with the narrow end 24 of a respective slot radiator 20 via microstrip or stripline connections as for example described in Knorr, Slot-Line Transitions, IEEE Transactions on Microwave Theory And Techniques, pp. 548-54 (May, 1974) and Mariani, et. al., Slot Line Characteristics, IEEE Transactions on Microwave Theory And Techniques, pp. 1091-96 (December, 1969).
  • a slot radiator address unit 40 is provided to address a desired slot radiator 20 via respective bias lines 42a - 42f so that a main signal S, which may be a data signal or a test signal, will be provided to a selected one of the slot radiators 20 in a manner more fully described below.
  • a feed structure address unit 38 is provided for addressably accessing a particular feed structure 10 for supplying the main signal S thereto.
  • the system uses the multiple narrow beams generated therefrom to scan the environment for determining the most efficient receiving and transmitting path for a data signal.
  • the feed structure address unit 38 addresses a desired feed structure 10 and provides thereto a signal S, comprising a test signal, through an input bus 36.
  • the test signal is converted to a narrow beam via transmission through a selected one of the slot radiators 20 by addressing the particular slot radiator through address unit 40.
  • a beam is transmitted individually from each of the slot radiators 20 from one feed structure 10 to the next until the most desired transmitting and receiving path is determined, i.e. that the path which yields the minimum amount of multipath rays.
  • scanning is conducted at both the transmitter and receiver.
  • data is communicated via the main signal S to the input bus 36, and transmitted through the selected slot radiator of the transmitter and received by the selected slot radiator of the receiver.
  • hemispherical scanning arrangements are used to maximize the scanning capabilities.
  • Such hemispherical scanning may for example be implemented through the use of a spherical lens. While a Luneburg lens is particularly suitable for this purpose, such lenses are difficult and costly to manufacture.
  • a constant dielectric spherical lens may be employed in conjunction with a plurality of the inventive feed structures 10 as depicted in FIG. 2. As there shown, therein, half of a spherical lens 50 having a constant dielectric is surrounded by a plurality of feed structures 10 each capable of emitting a plurality of beams having narrow beamwidths through slot radiators 20a - 20f.
  • the edge 18 of the feed structures 10 is conformingly shaped to match the curvature of the lens.
  • the individual feed structures 10a - 10x are arranged on or along a hemisphere, i.e. half of the lens 50, so that the beams generated therefrom cover the surface area of the opposite (i.e the scanning) hemisphere.
  • FIG. 3 illustrates 1/3 of the scanning hemisphere of the spherical lens 50.
  • the plurality of individual beamwidths 52 of the beams generated from the plural slot radiators 20 in the plural feed structures 10 substantially blanket the scanning hemisphere of the lens 50.
  • feed structures 10 arranged on 90° great circle arcs positioned on meridian lines of the spherical lens 50 and configured as follows: three feed structures 10 with six beam feeds (i.e. six slot radiators), nine feed structures 10 with five beam feeds, and twelve feed structures 10 with three beam feeds, yielding a total of 99 beams. It is, of course, within the intended scope and contemplation of the invention that additional arrangements of feed structures 10 may alternatively be employed for different hemispherical coverage, as is generally known in the art.
  • the inventive construction and arrangement notably increases the scanning capabilities of a WHSICS employing such feed structures and, by virtue of the relatively low cost and ease of manufacture of the inventive feed structures through known etching techniques, results in a significant reduction in the cost of such WHSICS.
  • the feed structure 10 may also be used in conjunction with lenses other than spherical lenses.
  • the edge 18 may be configured accordingly, i.e. to substantially conform to the surface shape of the particular lens.
  • additional or fewer slot radiators 20 may be employed in each feed structure 10. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
  • Transceivers (AREA)
EP95303494A 1994-06-01 1995-05-24 Structure de source pour utilisation dans un système de communication sans fil Withdrawn EP0685901A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25246294A 1994-06-01 1994-06-01
US252462 1994-06-01

Publications (1)

Publication Number Publication Date
EP0685901A2 true EP0685901A2 (fr) 1995-12-06

Family

ID=22956103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95303494A Withdrawn EP0685901A2 (fr) 1994-06-01 1995-05-24 Structure de source pour utilisation dans un système de communication sans fil

Country Status (3)

Country Link
EP (1) EP0685901A2 (fr)
JP (1) JPH07336134A (fr)
CA (1) CA2147399A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2763428A1 (fr) * 1997-05-19 1998-11-20 Trw Inc Dispositif pour emettre ou recevoir des ondes electromagnetiques millimetriques capable de creer une image bidimensionnelle
FR2785476A1 (fr) * 1998-11-04 2000-05-05 Thomson Multimedia Sa Dispositif de reception de signaux multi-faisceaux
EP1267446A1 (fr) * 2001-06-15 2002-12-18 Thomson Licensing S.A. Dispositif d' émission/réception de signaux électromagnétiques à diversité de rayonnement
WO2002075840A3 (fr) * 2001-03-16 2003-02-20 Marconi Corp Plc Communication avec des objets empilables grâce à un réseau d'antennes
FR2829298A1 (fr) * 2001-09-04 2003-03-07 Thomson Licensing Sa Dispositif de commutation pour des appareils de reception et/ou d'emission d'ondes electromagnetiques
FR2829301A1 (fr) * 2001-08-29 2003-03-07 Thomson Licensing Sa Antenne planaire, compacte, a deux acces et terminal la comportant
FR2831734A1 (fr) * 2001-10-29 2003-05-02 Thomson Licensing Sa Dispositif pour la reception et/ou l'emission de signaux electromagnetiques a diversite de rayonnement
FR2831733A1 (fr) * 2001-10-29 2003-05-02 Thomson Licensing Sa Dispositif pour la reception et/ou l'emission de signaux electromagnetiques a diversite de rayonnement
FR2853996A1 (fr) * 2003-04-15 2004-10-22 Thomson Licensing Sa Systeme d'antennes
US6878314B2 (en) 1997-09-24 2005-04-12 Novartis Ag Method for automatic manufacture of and printing on astigmatic contact lenses and apparatus therefor
EP1617513A1 (fr) * 2004-07-13 2006-01-18 Thomson Licensing Dispositif rayonnant omni-directionnel à large bande
US7123204B2 (en) 2002-04-24 2006-10-17 Forster Ian J Energy source communication employing slot antenna
US7271776B2 (en) 2000-12-05 2007-09-18 Thomson Licensing Device for the reception and/or the transmission of multibeam signals
CN100344120C (zh) * 2003-01-15 2007-10-17 华为技术有限公司 一种无线局域网中接入点发送下行数据的方法
CN100349428C (zh) * 2003-01-15 2007-11-14 华为技术有限公司 一种无线局域网中接入点发送广播消息的方法
FR2904481A1 (fr) * 2006-07-31 2008-02-01 Thomson Licensing Sas Antenne de type fente a amplificateurs integres
FR2925772A1 (fr) * 2007-12-21 2009-06-26 Thomson Licensing Sas Dispositif rayonnant multi secteurs presentant un mode omnidirectionnel

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236245B1 (fr) * 1999-11-18 2008-05-28 Automotive Systems Laboratory Inc. Antenne multifaisceau
KR100872489B1 (ko) * 2001-06-15 2008-12-05 톰슨 라이센싱 방사 다이버시티를 갖는 전자기 신호의 수신 및/또는 송신용 디바이스
FR2857165A1 (fr) * 2003-07-02 2005-01-07 Thomson Licensing Sa Antenne bi-bande avec double acces
TWI239681B (en) * 2004-12-22 2005-09-11 Tatung Co Ltd Circularly polarized array antenna

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KNORR: "Slot-Line Transitions", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, May 1974 (1974-05-01), pages 548 - 554, XP002199674, DOI: doi:10.1109/TMTT.1974.1128278
MARIANI ET AL.: "Slot Line Characteristics", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, December 1969 (1969-12-01), pages 1091 - 1096

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2763428A1 (fr) * 1997-05-19 1998-11-20 Trw Inc Dispositif pour emettre ou recevoir des ondes electromagnetiques millimetriques capable de creer une image bidimensionnelle
US6878314B2 (en) 1997-09-24 2005-04-12 Novartis Ag Method for automatic manufacture of and printing on astigmatic contact lenses and apparatus therefor
FR2785476A1 (fr) * 1998-11-04 2000-05-05 Thomson Multimedia Sa Dispositif de reception de signaux multi-faisceaux
US7271776B2 (en) 2000-12-05 2007-09-18 Thomson Licensing Device for the reception and/or the transmission of multibeam signals
WO2002075840A3 (fr) * 2001-03-16 2003-02-20 Marconi Corp Plc Communication avec des objets empilables grâce à un réseau d'antennes
US6657600B2 (en) 2001-06-15 2003-12-02 Thomson Licensing S.A. Device for the reception and/or the transmission of electromagnetic signals with radiation diversity
CN1307808C (zh) * 2001-06-15 2007-03-28 汤姆森许可贸易公司 采用辐射分集的电磁信号的接收和/或发射装置
FR2826209A1 (fr) * 2001-06-15 2002-12-20 Thomson Licensing Sa Dispositif pour la reception et/ou l'emission de signaux electromagnetiques a diversite de rayonnement
EP1267446A1 (fr) * 2001-06-15 2002-12-18 Thomson Licensing S.A. Dispositif d' émission/réception de signaux électromagnétiques à diversité de rayonnement
FR2829301A1 (fr) * 2001-08-29 2003-03-07 Thomson Licensing Sa Antenne planaire, compacte, a deux acces et terminal la comportant
EP1291971A1 (fr) * 2001-08-29 2003-03-12 Thomson Licensing S.A. Antenne planaire commutée
CN100411249C (zh) * 2001-08-29 2008-08-13 汤姆森许可贸易公司 带有两个端口的小型平面天线和终端
US6753824B2 (en) 2001-08-29 2004-06-22 Thomson Licensing, S.A. Compact, planar antenna with two ports and terminal comprising same
EP1291969A1 (fr) * 2001-09-04 2003-03-12 Thomson Licensing S.A. Antenna à fente communtée
FR2829298A1 (fr) * 2001-09-04 2003-03-07 Thomson Licensing Sa Dispositif de commutation pour des appareils de reception et/ou d'emission d'ondes electromagnetiques
CN1298112C (zh) * 2001-09-04 2007-01-31 汤姆森许可贸易公司 接收和/或发射电磁波设备的开关装置
US6847332B2 (en) 2001-09-04 2005-01-25 Thomson Licensing S.A. Switching device for apparatuses for receiving and/or transmitting electromagnetic waves
US6917342B2 (en) 2001-10-29 2005-07-12 Thomson Licensing S.A. Antenna system for the transmission of electromagnetic signals
FR2831734A1 (fr) * 2001-10-29 2003-05-02 Thomson Licensing Sa Dispositif pour la reception et/ou l'emission de signaux electromagnetiques a diversite de rayonnement
EP1309035A1 (fr) * 2001-10-29 2003-05-07 Thomson Licensing S.A. Antenne commutée
FR2831733A1 (fr) * 2001-10-29 2003-05-02 Thomson Licensing Sa Dispositif pour la reception et/ou l'emission de signaux electromagnetiques a diversite de rayonnement
US7755556B2 (en) 2002-04-24 2010-07-13 Forster Ian J Energy source communication employing slot antenna
US7414589B2 (en) 2002-04-24 2008-08-19 Mineral Lassen Llc Energy source communication employing slot antenna
US7123204B2 (en) 2002-04-24 2006-10-17 Forster Ian J Energy source communication employing slot antenna
US7372418B2 (en) 2002-04-24 2008-05-13 Mineral Lassen Llc Energy source communication employing slot antenna
CN100349428C (zh) * 2003-01-15 2007-11-14 华为技术有限公司 一种无线局域网中接入点发送广播消息的方法
CN100344120C (zh) * 2003-01-15 2007-10-17 华为技术有限公司 一种无线局域网中接入点发送下行数据的方法
FR2853996A1 (fr) * 2003-04-15 2004-10-22 Thomson Licensing Sa Systeme d'antennes
WO2004093250A1 (fr) * 2003-04-15 2004-10-28 Thomson Licensing Systeme d’antennes a fente rayonnante
US7408518B2 (en) 2003-04-15 2008-08-05 Thomson Licensing Radiating slit antenna system
US7167136B2 (en) 2004-07-13 2007-01-23 Thomson Licensing Wideband omnidirectional radiating device
FR2873236A1 (fr) * 2004-07-13 2006-01-20 Thomson Licensing Sa Dispositif rayonnant omnidirectionnel large bande
EP1617513A1 (fr) * 2004-07-13 2006-01-18 Thomson Licensing Dispositif rayonnant omni-directionnel à large bande
CN1722519B (zh) * 2004-07-13 2011-06-22 汤姆森特许公司 宽带全向辐射设备
FR2904481A1 (fr) * 2006-07-31 2008-02-01 Thomson Licensing Sas Antenne de type fente a amplificateurs integres
EP1887655A1 (fr) * 2006-07-31 2008-02-13 THOMSON Licensing Antenne de type fente dotée d'amplificateurs intégrés
US7642980B2 (en) 2006-07-31 2010-01-05 Thomson Licensing Slot type antenna with integrated amplifiers
FR2925772A1 (fr) * 2007-12-21 2009-06-26 Thomson Licensing Sas Dispositif rayonnant multi secteurs presentant un mode omnidirectionnel
US8593361B2 (en) 2007-12-21 2013-11-26 Thomson Licensing Multi-sector radiating device with an omni-directional mode

Also Published As

Publication number Publication date
JPH07336134A (ja) 1995-12-22
CA2147399A1 (fr) 1995-12-02

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