EP0249303A1 - Dipolfeld - Google Patents

Dipolfeld Download PDF

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Publication number
EP0249303A1
EP0249303A1 EP87301428A EP87301428A EP0249303A1 EP 0249303 A1 EP0249303 A1 EP 0249303A1 EP 87301428 A EP87301428 A EP 87301428A EP 87301428 A EP87301428 A EP 87301428A EP 0249303 A1 EP0249303 A1 EP 0249303A1
Authority
EP
European Patent Office
Prior art keywords
dipoles
adjacent
antenna
arms
dipole
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Withdrawn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
EP87301428A
Other languages
English (en)
French (fr)
Inventor
Edmund Wergiliusz Woloszczuk
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Publication of EP0249303A1 publication Critical patent/EP0249303A1/de
Withdrawn legal-status Critical Current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
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
    • 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
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials
    • 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
    • H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions

Definitions

  • This invention relates to an antenna comprising an array of dipoles.
  • a well known undesirable characteristic of such antennas is that strong coupling exists between adjacent dipoles. It is difficult to predict the nature of the coupling in any particular design and therefore it is also difficult to select the correct phase and amplitude values to be applied to each dipole in order to achieve a required beamshape. This problem is set out in a paper entitled "Mutual Coupling in Two-Dimensional Arrays" by J. Blass and S.J. Rabinowitz published by the Institute of Radio Engineers Western Convention Record Vol. l Part l pages l34-l50.
  • This invention provides an antenna comprising an array of dipoles each comprising two arms arranged at an angle to each other so that adjacent arms of adjacent dipoles are not parallel.
  • each dipole arm will normally make, with a plane passing through all the dipoles in the array, the same angle as does each other dipole arm.
  • this is not a necessary feature of the invention and it would be possible, perhaps for some specialist purpose, for one arm of each dipole to be, for example, parallel to that plane.
  • the dipoles may be formed in a particularly simple manner by shaped extensions of ground planes of a triplate structure which feeds energy to the dipoles.
  • adjacent arms of adjacent dipoles are at 90 degrees to each other. This arrangement has been found to maximise the reduction in mutual coupling. Of course, adjacent arms of adjacent dipoles may be at other angles to each other, but the resulting reduction in mutual coupling will probably be less.
  • Each dipole may have a second crossed dipole associated with it, each such pair of crossed dipoles being connected to a feed system designed to impose a relative phase shift between them.
  • the antenna can radiate or receive circularly or eliptically polarised radiation.
  • a transmitter l which feeds a signal of microwave frequency to a beam forming network 2.
  • the latter which is of conventional design, applies the signal, with different phase and amplitude adjustments, designed to produce a beam having a specified shape in azimuth, to co-axial lines 3.
  • the adjustments made at 3 change periodically to scan the beam in azimuth.
  • the co-axial lines 3 lead to corresponding triplates 4 each of which has two outer conductors and an inner conductor having a number of branches leading to respective vertically spaced dipoles.
  • This inner conductor is designed to split the available energy and to impose appropriate phase shifts in such a way as to achieve a desired vertical beam shape in a manner known per se.
  • the front edges of the outer conductors of each triplate are machined to form a pair of projections 5 each having arms 6 separated by a slot 7. These projections extend through holes 8 in a reflector 9.
  • a conductive rod l0 connects together the projections of each pair on one side of slot 7.
  • a second conductive rod ll connects the projections on the other side of the slot back together and to the end l2 of a branch of the inner conductor.
  • each pair of projections define a dipole, and, as will be seen from the drawing, these arms are arranged at an angle, in this case 45 degrees to a plane in which the dipoles lie, this being parallel to the plane of the reflector 9.
  • the arms of each dipole also define an angle relative to each other, this angle being 90 degrees in the illustrated embodiment.
  • angles of the arms of the dipoles are of significance because adjacent arms of adjacent dipoles are, unlike similar known arrays, not parallel. On the contrary they are at right-angles to each other. This has been found to reduced mutual coupling between them to a significant extent.
  • FIG. 2 With reference to the alternative construction of Figure 2 there is shown a ground plane l3 and four angular elements l4A, l4B and l5A, l5B, each having an upright attached to the ground plate and a dipole arm which defines an angle of 45 degrees with the ground plane and an angle of 90 degrees with an adjacent arm of an adjacent dipole (not shown).
  • Arms of elements l4A and l4B define a dipole which is fed by a co-axial cable l6 passing through a hole l7 in the reflector.
  • the outer conductor of the cable l6 is soldered at l8 to one arm and the inner conductor l6A is soldered at l9 to the other arm.
  • Arms of elements l5A, l5B define a second dipole arranged in a plane at right angles to the plane of the first dipole. It is fed by a similar co-axial cable 20 passing through a hole 2l and having similarly connected inner and outer conductors. Signals applied to the cables l6 and 20 are subjected to relative phase shifts so that the structure illustrated will radiate or receive radiation polarised in a desired manner, for example circularly polarised.
  • the embodiments specifically described comprise an array of elements arranged in vertical columns and horizontal rows
  • the elements may be arranged to form a triangular grid in which there is vertical alignment between respective elements in alternate horizontal rows, but no vertical alignment between respective elements in adjacent horizontal rows ( Figure 3).
  • Figure 3 When the elements are so arranged, it is found that, as well as there being a reduction in mutual coupling in the E plane, there is also a reduction in mutual coupling in the H-plane. This is of particular significance where the beam is scanned in the H-plane as is the case in Figure l.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP87301428A 1986-05-28 1987-02-19 Dipolfeld Withdrawn EP0249303A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08612906A GB2191043A (en) 1986-05-28 1986-05-28 Dipole array
GB8612906 1986-05-28

Publications (1)

Publication Number Publication Date
EP0249303A1 true EP0249303A1 (de) 1987-12-16

Family

ID=10598532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87301428A Withdrawn EP0249303A1 (de) 1986-05-28 1987-02-19 Dipolfeld

Country Status (2)

Country Link
EP (1) EP0249303A1 (de)
GB (1) GB2191043A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2808128A1 (fr) * 2000-04-20 2001-10-26 Cit Alcatel Antenne monolithique a polarisation croisee
EP1367672A1 (de) * 2002-05-31 2003-12-03 Radio Frequency Systems, Inc. Eine geformte Dipolantenne für eine oder zwei Polarisationen mit integrierter Speisung
DE19829714B4 (de) * 1997-07-03 2006-04-20 Alcatel Antenne mit dualer Polarisation
CN101546869B (zh) * 2009-04-23 2012-08-29 上海交通大学 用于td-scdma基站的偶极子阵列天线

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218544A1 (de) * 1992-06-05 1993-12-16 Abb Patent Gmbh Kurzwellen-Sendeantenne
US6072439A (en) * 1998-01-15 2000-06-06 Andrew Corporation Base station antenna for dual polarization

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1441608A1 (de) * 1962-07-10 1970-01-08 Thomson Houston Comp Francaise Antenne fuer Dezimeterwellen
DE2036589B2 (de) * 1970-07-23 1976-08-05 Rohde & Schwarz, 8000 München Dipol-doppelgruppe
US4131896A (en) * 1976-02-10 1978-12-26 Westinghouse Electric Corp. Dipole phased array with capacitance plate elements to compensate for impedance variations over the scan angle
US4513292A (en) * 1982-09-30 1985-04-23 Rca Corporation Dipole radiating element
US4514734A (en) * 1980-05-12 1985-04-30 Grumman Aerospace Corporation Array antenna system with low coupling elements
EP0186455A2 (de) * 1984-12-20 1986-07-02 The Marconi Company Limited Mehrdipolenantenne

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB657757A (en) * 1945-08-30 1951-09-26 Us Commerce Improvements in or relating to antenna
US3348228A (en) * 1965-08-02 1967-10-17 Raytheon Co Circular dipole antenna array
GB1318064A (en) * 1969-11-18 1973-05-23 Licentia Gmbh Short wave radio direction finders
US3718935A (en) * 1971-02-03 1973-02-27 Itt Dual circularly polarized phased array antenna
GB1337100A (en) * 1971-10-27 1973-11-14 Antenna

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1441608A1 (de) * 1962-07-10 1970-01-08 Thomson Houston Comp Francaise Antenne fuer Dezimeterwellen
DE2036589B2 (de) * 1970-07-23 1976-08-05 Rohde & Schwarz, 8000 München Dipol-doppelgruppe
US4131896A (en) * 1976-02-10 1978-12-26 Westinghouse Electric Corp. Dipole phased array with capacitance plate elements to compensate for impedance variations over the scan angle
US4514734A (en) * 1980-05-12 1985-04-30 Grumman Aerospace Corporation Array antenna system with low coupling elements
US4513292A (en) * 1982-09-30 1985-04-23 Rca Corporation Dipole radiating element
EP0186455A2 (de) * 1984-12-20 1986-07-02 The Marconi Company Limited Mehrdipolenantenne

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19829714B4 (de) * 1997-07-03 2006-04-20 Alcatel Antenne mit dualer Polarisation
FR2808128A1 (fr) * 2000-04-20 2001-10-26 Cit Alcatel Antenne monolithique a polarisation croisee
EP1152487A1 (de) * 2000-04-20 2001-11-07 Alcatel Monolitische Antenne mit orthogonaler Polarisation
EP1367672A1 (de) * 2002-05-31 2003-12-03 Radio Frequency Systems, Inc. Eine geformte Dipolantenne für eine oder zwei Polarisationen mit integrierter Speisung
US6747606B2 (en) 2002-05-31 2004-06-08 Radio Frequency Systems Inc. Single or dual polarized molded dipole antenna having integrated feed structure
AU2003204333B2 (en) * 2002-05-31 2008-09-04 Radio Frequency Systems. Inc. A single or dual polarized molded dipole antenna having integrated feed structure
CN1462089B (zh) * 2002-05-31 2010-05-12 无线电射频系统公司 带有集成馈电结构的单或双偏振模塑偶极天线
CN101546869B (zh) * 2009-04-23 2012-08-29 上海交通大学 用于td-scdma基站的偶极子阵列天线

Also Published As

Publication number Publication date
GB8612906D0 (en) 1986-07-02
GB2191043A (en) 1987-12-02

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Inventor name: WOLOSZCZUK, EDMUND WERGILIUSZ