EP0718912A1 - Antenne - Google Patents

Antenne Download PDF

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Publication number
EP0718912A1
EP0718912A1 EP95120274A EP95120274A EP0718912A1 EP 0718912 A1 EP0718912 A1 EP 0718912A1 EP 95120274 A EP95120274 A EP 95120274A EP 95120274 A EP95120274 A EP 95120274A EP 0718912 A1 EP0718912 A1 EP 0718912A1
Authority
EP
European Patent Office
Prior art keywords
antenna
individual
individual element
propagation
individual elements
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.)
Ceased
Application number
EP95120274A
Other languages
German (de)
English (en)
French (fr)
Inventor
Gerhard Dr. Greving
Harald Müller
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.)
Alcatel Lucent Deutschland AG
Original Assignee
Alcatel SEL AG
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 Alcatel SEL AG filed Critical Alcatel SEL AG
Publication of EP0718912A1 publication Critical patent/EP0718912A1/de
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole
    • 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
    • H01Q19/28—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 a secondary device in the form of two or more substantially straight conductive elements
    • H01Q19/30—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 a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna

Definitions

  • the invention relates to an antenna with at least three individual elements, which are parallel to one another and perpendicular to a predetermined direction of propagation, according to the preamble of claim 1.
  • Such antennas are generally known.
  • Antenna arrangements that illuminate a "radio hose" are required for railway radio along a railway line and for mobile radio on motorways or in urban canyons. Such antenna arrangements are intended to be bundled on the one hand and to radiate bidirectionally on the other hand.
  • Bundling can e.g. can be achieved by assembling an antenna from several parallel individual elements, all of which lie in the same plane and whose mutual phase positions result in the formation of wavefronts transverse to the intended direction of propagation.
  • Bidirectionality is generally achieved in the applications mentioned by using a separate antenna for each direction. These not only have to be installed separately; they must also be fed separately.
  • the invention provides a remedy by an antenna according to the teaching of claim 1.
  • the symmetrical design in principle and also in the preferred embodiment leads to a reduction in the overall dimensions and moreover has the advantage of simple feeding.
  • Figure 1 shows an embodiment of an antenna according to the invention in a bidirectional design.
  • FIG. 2 shows a detail for the symmetrical feeding of a broadband dipole implemented in planar technology.
  • the exemplary embodiment according to FIG. 1 is an antenna designed using stripline technology.
  • a radiator dipole S is located in the middle on a substrate Sub and a row of directors D11, D12 and D13 or D21, D22 and D23 is located on each side thereof.
  • the difference compared to known Yagi antennas lies in the fact that instead of the usual reflector there is a second row of directors. Otherwise, the dimensioning takes place as with known Yagi antennas with the measures familiar to the person skilled in the art.
  • the supply of the radiator dipole S is not shown in Figure 1.
  • radiator dipoles manufactured in stripline technology and thus the entire antenna, often have asymmetrical radiation due to the asymmetrical supply.
  • An embodiment of the radiator dipole, as shown in Figure 2 has a high degree of symmetry even in the vertical direction.
  • connection point A (here dashed), a coupling line K and a line section L.
  • the connection point A lies in the dipole axis just above the slot SL.
  • the coupling line K crosses the slot SL on the back in the dipole axis and thus couples into the slot.
  • the line section L extends in two halves transversely to the coupling line K and symmetrically to the latter, and closes it off in a manner adapted to the connection point A.
  • the dimensions are in the order of magnitude of the dipole length. The exact dimensions are easiest to determine experimentally.
  • Antennas for longer wavelengths are unsuitable for use in stripline technology on a common substrate. Any other technique is just as suitable.
  • radiator dipole need not be broadband (triangular shape).
  • the number and arrangement of the directors on both sides need not be symmetrical. Depending on the area to be illuminated, the two sides may also differ. The two directions can also be bent against each other.
  • a currently contemplated version differs from the example according to FIG. 1 in that there are a total of four rows of dipoles. Two of them lie on the same axis as in FIG. 1. The two axes are laterally offset from each other so that two dipoles are in a row. The axis of the common radiator dipole lies in the middle between the axes of the dipole rows.
  • the antenna will generally not be able to lie in the axis of the "radio hose" to be illuminated. Rather, it will be inconspicuously installed on the outside of a building at the edge of the "radio hose".
  • Metals such as aluminum or steel, which are often found on or in building walls, destroy any careful dimensioning of the antenna.
  • a particularly advantageous embodiment of the antenna therefore has a reflecting surface which is arranged parallel to the predefined direction of propagation and parallel to the individual elements, ie in the case of design using a planer technique, parallel to the substrate.
  • the size of this reflective surface is similar to that of the substrate in the case of the planar technique.
  • the distance is in the order of a quarter of the wavelength.
  • the entire antenna is placed in a housing.
  • the back of the housing is metallically conductive and forms the reflective surface. If a transmission amplifier is also integrated in the antenna and the housing is shaped into cooling fins on the back, there is automatically a sufficient distance between the reflecting surface and the housing wall.
EP95120274A 1994-12-23 1995-12-21 Antenne Ceased EP0718912A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4446128 1994-12-23
DE19944446128 DE4446128A1 (de) 1994-12-23 1994-12-23 Antenne

Publications (1)

Publication Number Publication Date
EP0718912A1 true EP0718912A1 (de) 1996-06-26

Family

ID=6536799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120274A Ceased EP0718912A1 (de) 1994-12-23 1995-12-21 Antenne

Country Status (3)

Country Link
EP (1) EP0718912A1 (sv)
DE (1) DE4446128A1 (sv)
FI (1) FI956250A (sv)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000059067A2 (en) * 1999-03-29 2000-10-05 Intermec Ip Corp. Antenna structure for wireless communications device, such as rfid tag
WO2005038983A1 (en) * 2003-09-12 2005-04-28 Symbol Technologies, Inc. Directional antenna array
US7423606B2 (en) 2004-09-30 2008-09-09 Symbol Technologies, Inc. Multi-frequency RFID apparatus and methods of reading RFID tags
US7579955B2 (en) 2006-08-11 2009-08-25 Intermec Ip Corp. Device and method for selective backscattering of wireless communications signals
US7893813B2 (en) 2005-07-28 2011-02-22 Intermec Ip Corp. Automatic data collection device, method and article
US8002173B2 (en) 2006-07-11 2011-08-23 Intermec Ip Corp. Automatic data collection device, method and article
US8120461B2 (en) 2006-04-03 2012-02-21 Intermec Ip Corp. Automatic data collection device, method and article
US8199689B2 (en) 2005-09-21 2012-06-12 Intermec Ip Corp. Stochastic communication protocol method and system for radio frequency identification (RFID) tags based on coalition formation, such as for tag-to-tag communication

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10105981A1 (de) * 2001-02-09 2002-09-12 Siemens Ag Kommunikationsgerät und Verfahren zum Betrieb eines Anlagefunksystems

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3518673A (en) * 1967-06-08 1970-06-30 Sintef Antenna system for ils localizers
US4812855A (en) * 1985-09-30 1989-03-14 The Boeing Company Dipole antenna with parasitic elements
US5293172A (en) * 1992-09-28 1994-03-08 The Boeing Company Reconfiguration of passive elements in an array antenna for controlling antenna performance
JPH0669723A (ja) * 1991-03-28 1994-03-11 Taiyo Musen Kk 八木アンテナ
JPH111006A (ja) * 1997-06-12 1999-01-06 Canon Inc 記録装置及び記録方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB672034A (en) * 1950-01-21 1952-05-14 Nat Res Dev Aerial systems
GB939790A (en) * 1960-12-16 1963-10-16 Marconi Wireless Telegraph Co Improvements in or relating to aerial systems
GB982155A (en) * 1962-08-21 1965-02-03 Marconi Co Ltd Improvements in or relating to aerial systems
DE2138384C2 (de) * 1971-07-31 1982-10-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Yagi-Antenne in Streifenleitertechnik
DE8304525U1 (de) * 1983-02-18 1983-09-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mikrowellenantenne fuer linienverbindungen, insbesondere im millimeterwellenbereich
US4644363A (en) * 1985-05-14 1987-02-17 The United States Of America As Represented By The Secretary Of The Army Integrated dual beam line scanning antenna and negative resistance diode oscillator
US5008681A (en) * 1989-04-03 1991-04-16 Raytheon Company Microstrip antenna with parasitic elements
FR2667730B1 (fr) * 1990-10-03 1993-07-02 Bretagne Ctre Rgl Tra Antenne.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3518673A (en) * 1967-06-08 1970-06-30 Sintef Antenna system for ils localizers
US4812855A (en) * 1985-09-30 1989-03-14 The Boeing Company Dipole antenna with parasitic elements
JPH0669723A (ja) * 1991-03-28 1994-03-11 Taiyo Musen Kk 八木アンテナ
US5293172A (en) * 1992-09-28 1994-03-08 The Boeing Company Reconfiguration of passive elements in an array antenna for controlling antenna performance
JPH111006A (ja) * 1997-06-12 1999-01-06 Canon Inc 記録装置及び記録方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
NESIC ET AL.: "BROADBAND TWO-DIMENSIONAL PRINTED ANTENNA ARRAY", CONFERENCE PROCEEDINGS 20TH EUROPEAN MICROWAVE CONFERENCE 90, vol. 1, 10 September 1990 (1990-09-10) - 13 September 1990 (1990-09-13), BUDAPEST,HUNGARY, pages 252 - 256, XP000326962 *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 343 (E - 796) 2 August 1989 (1989-08-02) *
PATENT ABSTRACTS OF JAPAN vol. 18, no. 318 (E - 1562) 16 June 1994 (1994-06-16) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000059067A2 (en) * 1999-03-29 2000-10-05 Intermec Ip Corp. Antenna structure for wireless communications device, such as rfid tag
WO2000059067A3 (en) * 1999-03-29 2001-02-22 Intermec Ip Corp Antenna structure for wireless communications device, such as rfid tag
US6278413B1 (en) 1999-03-29 2001-08-21 Intermec Ip Corporation Antenna structure for wireless communications device, such as RFID tag
WO2005038983A1 (en) * 2003-09-12 2005-04-28 Symbol Technologies, Inc. Directional antenna array
US7205953B2 (en) 2003-09-12 2007-04-17 Symbol Technologies, Inc. Directional antenna array
US7423606B2 (en) 2004-09-30 2008-09-09 Symbol Technologies, Inc. Multi-frequency RFID apparatus and methods of reading RFID tags
US7893813B2 (en) 2005-07-28 2011-02-22 Intermec Ip Corp. Automatic data collection device, method and article
US8199689B2 (en) 2005-09-21 2012-06-12 Intermec Ip Corp. Stochastic communication protocol method and system for radio frequency identification (RFID) tags based on coalition formation, such as for tag-to-tag communication
US8488510B2 (en) 2005-09-21 2013-07-16 Intermec Ip Corp. Stochastic communication protocol method and system for radio frequency identification (RFID) tags based on coalition formation, such as for tag-to-tag communication
US8120461B2 (en) 2006-04-03 2012-02-21 Intermec Ip Corp. Automatic data collection device, method and article
US8002173B2 (en) 2006-07-11 2011-08-23 Intermec Ip Corp. Automatic data collection device, method and article
US7579955B2 (en) 2006-08-11 2009-08-25 Intermec Ip Corp. Device and method for selective backscattering of wireless communications signals

Also Published As

Publication number Publication date
FI956250A0 (sv) 1995-12-22
FI956250A (sv) 1996-06-24
DE4446128A1 (de) 1996-06-27

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