WO2002031919A1 - Reseau d"antennes - Google Patents

Reseau d"antennes Download PDF

Info

Publication number
WO2002031919A1
WO2002031919A1 PCT/FI2001/000874 FI0100874W WO0231919A1 WO 2002031919 A1 WO2002031919 A1 WO 2002031919A1 FI 0100874 W FI0100874 W FI 0100874W WO 0231919 A1 WO0231919 A1 WO 0231919A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
antenna array
antenna element
elements
directed
Prior art date
Application number
PCT/FI2001/000874
Other languages
English (en)
Inventor
Jaakko Talvitie
Pekka Jakkula
Ari Hulkkonen
Pekka Moilanen
Original Assignee
Pj Microwave Oy
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 Pj Microwave Oy filed Critical Pj Microwave Oy
Priority to AU2001295637A priority Critical patent/AU2001295637A1/en
Publication of WO2002031919A1 publication Critical patent/WO2002031919A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • 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
    • 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
    • H01Q3/26—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture

Definitions

  • the invention relates to a phased antenna array by means of which the transmitting and/or receiving direction can be changed.
  • Figure 4 shows vertical directioning of an antenna array
  • Figure 7B shows a slot antenna array
  • a solution according to the invention can be used particularly in the creation of point-to-point connections in the microwave area without, however, confining the invention thereto.
  • a typical phased antenna array is planar, such as shown in Figure 1.
  • the antenna array comprises antenna elements 100 and a support structure 102 of the antenna elements.
  • the antenna elements can be made of a printed board by etching.
  • the antenna array is directed by changing the phasing of each antenna element in a known manner by means of phase shifters and control logic. This aspect is explained in more detail in Antenna Engineering Handbook by Johnson, R., C, pp. 20-1 ... 20-67, McGraw Hill Inc., 1993, which is incorporated as reference herein.
  • the printed board of which the antenna elements 100 are made are attached to a support structure, which is an aluminium sheet, for example.
  • the antenna array comprises two antenna element groups 200 and 202, both comprising at least one antenna element 203.
  • angle ⁇ which is measured from the backside of the antenna element arrays 200 and 202 (the front side of the antenna arrays 200 and 202 is the side at which the antenna beam or antenna beams are directed), is smaller than 180°.
  • the angle is preferably 90°.
  • the angle ⁇ between the antenna arrays enables the transmission and/or reception over a large sector of even 180°.
  • the antenna beam can be directed by phasing antenna elements in a desired direction in said sector of 180°. Further, the antenna beam can be directed towards a large sector in vertical direction. For example, in vertical and horizontal direction, a conventional narrow-sector directioning can be carried out.
  • FIG. 3 shows a block diagram of an antenna array.
  • the antenna array module comprises at least two independent antenna arrays 200 and 202. Both antenna arrays comprise antenna elements, phase shifters and control logic (not shown in Figure 3).
  • the antenna array is connected to an RF block 304, from which a signal of RF frequency is supplied to the antennas during the transmission and which, during the reception, converts the received RF frequency signal into a baseband signal.
  • the antenna module is controlled by a baseband block 306 to which the received signals arrive and from which the signals to be transmitted are fed to the RF block 304.
  • the antenna arrays 200 and 202 are preferably planar, their surface normals being not, however, parallel but there being an angle ⁇ between the antenna arrays.
  • Figure 5 shows a case where horizontal directioning of the antenna is needed.
  • the antenna arrays are attached to the buildings in such a way that the angle between the antenna element arrays opens in horizontal direction.
  • Electromagnetic radiation from the transmitting antenna array 500 proceeds through several reflections via two paths to the receiving antenna array 502.
  • the radiation can proceed via more than two paths as well, but Figure 5 shows, for the sake of clarity, only two paths. Since the radiation arrives in the receiving antenna array 502 in the direction of the walls of buildings, the wide-angle reception according to the present solution enables both reception directions to be utilized effectively.
  • Figure 7A shows a solution in which an antenna array 700 is positioned in at least one corner of the apparatus 702. In this way, the apparatus can communicate at the angle of 360° with a narrow or wide beam.
  • the antenna of the apparatus casing is generally a monopole antenna upon the apparatus, prone to breaking or bending.
  • a slot antenna according to the disclosed solution utilizes the apparatus housing, so that there are no protrusive parts. In addition to the practicability, the visual appearance is also good.
  • Figure 7C shows a slot antenna, the slot antenna elements 730 and 732 of which are not separated from each other with material at the angle of the housing, but one physical slot continues from the side of the first wall over to the second wall. Still, the slot antenna elements 730 and 732 on different walls function independently. In such a case, the width of the slot is preferably one wavelength instead of half a wavelength.
  • Figures 8A and 8B show the relevant parts as regards the operation of the slot antenna element.
  • Figure 8A shows a top view of a slot antenna element.
  • the slot antenna element comprises a slot 800 in an electricity-conducting material 802 and a strip line 804 isolated from the electricity-conducting material 802, connected to the transmitter of receiver via a connector 806.
  • the slot antenna element radiates to the surroundings the electromagnetic radiation fed via the strip line 804 and arranged in the slot 800 and receives via the slot 800 electromagnetic radiation to the strip line 804 in a manner known as such.

Abstract

Réseau d"antennes comportant des éléments (203) d"antenne et une structure de support (204) à laquelle les éléments (203) d"antenne sont attachés. En outre, ledit réseau d"antennes comporte au moins deux groupes (200, 202) d"éléments d"antenne dont chacun comprend au moins un élément (203) d"antenne, les groupes (200, 202) d"éléments d"antenne étant physiquement orientés dans des directions différentes.
PCT/FI2001/000874 2000-10-13 2001-10-09 Reseau d"antennes WO2002031919A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001295637A AU2001295637A1 (en) 2000-10-13 2001-10-09 Antenna array

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20002273 2000-10-13
FI20002273A FI20002273A0 (fi) 2000-10-13 2000-10-13 Antenniryhmä

Publications (1)

Publication Number Publication Date
WO2002031919A1 true WO2002031919A1 (fr) 2002-04-18

Family

ID=8559299

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2001/000874 WO2002031919A1 (fr) 2000-10-13 2001-10-09 Reseau d"antennes

Country Status (3)

Country Link
AU (1) AU2001295637A1 (fr)
FI (1) FI20002273A0 (fr)
WO (1) WO2002031919A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004084347A1 (fr) * 2003-03-18 2004-09-30 Cisco Technology, Inc. Point d'acces multivoie a antennes isolees co-implantees

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686926A (en) * 1992-12-01 1997-11-11 Ntt Mobile Communications Network Inc. Multibeam antenna devices
US5872548A (en) * 1997-02-04 1999-02-16 Gec-Marconi Hazeltine Corporation Electronic Systems Division Space/angle diversity configurations for cellular antennas
US5943015A (en) * 1995-04-13 1999-08-24 Northern Telecom Limited Layered antenna
DE19845868A1 (de) * 1998-10-05 2000-04-06 Pates Tech Patentverwertung Doppelfokusplanarantenne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686926A (en) * 1992-12-01 1997-11-11 Ntt Mobile Communications Network Inc. Multibeam antenna devices
US5943015A (en) * 1995-04-13 1999-08-24 Northern Telecom Limited Layered antenna
US5872548A (en) * 1997-02-04 1999-02-16 Gec-Marconi Hazeltine Corporation Electronic Systems Division Space/angle diversity configurations for cellular antennas
DE19845868A1 (de) * 1998-10-05 2000-04-06 Pates Tech Patentverwertung Doppelfokusplanarantenne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004084347A1 (fr) * 2003-03-18 2004-09-30 Cisco Technology, Inc. Point d'acces multivoie a antennes isolees co-implantees
US6933909B2 (en) 2003-03-18 2005-08-23 Cisco Technology, Inc. Multichannel access point with collocated isolated antennas

Also Published As

Publication number Publication date
AU2001295637A1 (en) 2002-04-22
FI20002273A0 (fi) 2000-10-13

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