EP0542447A1 - Antenne à plaque plane - Google Patents

Antenne à plaque plane Download PDF

Info

Publication number
EP0542447A1
EP0542447A1 EP92309808A EP92309808A EP0542447A1 EP 0542447 A1 EP0542447 A1 EP 0542447A1 EP 92309808 A EP92309808 A EP 92309808A EP 92309808 A EP92309808 A EP 92309808A EP 0542447 A1 EP0542447 A1 EP 0542447A1
Authority
EP
European Patent Office
Prior art keywords
ground plane
probes
flat plate
plate antenna
feed network
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.)
Granted
Application number
EP92309808A
Other languages
German (de)
English (en)
Other versions
EP0542447B1 (fr
Inventor
Martin Stevens Dr. Smith
Dean Dr. Kitchener
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of EP0542447A1 publication Critical patent/EP0542447A1/fr
Application granted granted Critical
Publication of EP0542447B1 publication Critical patent/EP0542447B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01Q21/064—Two dimensional planar arrays using horn or slot aerials
    • 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
    • H01Q19/005—Patch antenna using one or more coplanar parasitic elements

Definitions

  • This invention relates to flat plate antennas having either directional or omnidirectional field patterns in azimuth with limited elevation radiation patterns.
  • an antenna can be either a single radiating element (e.g. one dipole) or an array of like radiating elements.
  • a flat plate antenna having at least one radiating element comprising a dipole and a distribution network therefor formed as a single printed conductive pattern layer and means for preventing radiation from the distribution network.
  • a flat plate antenna having at least one radiating element comprising a ground plane having a pair of identical rectangular apertures in alignment, a pair of colinear probes each projecting in opposite direction into a respective aperture to form a dipole, a feed network conductor pattern connected to and arranged to feed the probes in antiphase whereby each probe radiates through its respective aperture, wherein the dimensions of the apertures in relation to the overall dimensions of the ground plane are such that the portions of the ground plane parallel to the probes act as parasitic radiating elements, the probes are continuations of the feed network conductor pattern, the feed network conductor pattern and the probes are formed on an insulating substrate adjacent to and parallel with the ground plane and the feed network conductor pattern is positioned so as to be in alignment with unapertured portions of the ground plane in a microstrip configuration.
  • a plurality of like radiating elements are formed in alignment in a common ground plane with a common feed network conductor pattern arranged to feed all the probes having one orientation in phase and all the probes having an opposing orientation in antiphase.
  • the antenna includes a second ground plane having the same arrangement of apertures as the first ground plane, the feed network and probes and the two ground planes together forming a triplate structure.
  • the antenna may further include a reflector plane spaced from the rear of the antenna.
  • the flat plate antenna element shown in Figs. 1 and 2 comprises a fibre glass substrate 10 to one side of which is positioned a metallic ground plane 12 having two identical rectangular apertures 14, 16. On the opposite side of the substrate there is positioned a metallic conductor pattern which consists of two probes 18, 20 and a common feed network 22a, 22b. A feed point 24 is provided for connection to an external feed (not shown).
  • the feed network 22a, 22b is positioned so as to form a microstrip transmission line with portions of the ground plane defining the rectangular apertures. The position of the feed point 24 is chosen so that when an r.f.
  • the relative lengths of the two portions 22a and 22b of the network are such as to cause the two probes 18 and 20 to be fed in antiphase, thereby creating a dipole antenna structure.
  • the dimensions of the rectangular apertures and the bounding portions of the ground plane are chosen so that the bounding portions 26, 28 parallel with the probes act as parasitic antenna radiating elements, shaping the pattern of the antenna.
  • Fig. 3 shows a triplate version of the antenna of Figs 1 and 2 in which a second ground plane 30 identical with ground plane 12 is placed on the other side of the substrate 10.
  • the second ground plane is spaced from the plane of the feed network by dielectric spacing means (not shown) so that the feed network is equally spaced from both ground planes.
  • the feed network can be formed by conventional printed circuit techniques on a fibre glass board and the ground planes can be stamped out of aluminium sheets. Spacing between the network and the ground planes can be foamed dielectric sheets or by dielectric studs interposed between the various layers.
  • a metallic back reflector 32 can be attached to the antenna as shown in Fig. 4.
  • FIG. 1 An experimental single element antenna was constructed as shown in Figs. 1 and 2 using a fibre glass substrate board 10 of 1.6mm thickness on which the feed network 22a, 22b and probes 18,20 were formed as printed circuitry.
  • the overall antenna width was 80mm and length was 115mm.
  • Each aperture was 40mm by 60mm.
  • Each probe was 26.5mm long.
  • the feed network was in general 5mm wide but parts of it were only 3mm wide to achieve suitable impedance matching.
  • Fig. 5a shows the measured azimuth radiation pattern for this antenna at a frequency of 1795MHz. It will be noted that a beamwidth of approximately 120° is obtained with a peak gain of 6dBi.
  • a second single element triplate antenna was constructed as shown in Fig. 4 but with a modified feed network.
  • the wide portions of the feed network were 3.5mm and the narrow portions were 2mm wide.
  • the overall dimensions were still 80mm by 115mm and the dimensions of the apertures were again 40mm by 60mm.
  • the azimuth radiation pattern at 1795 MHz is shown in Fig. 5b.
  • a modified feed network having a central feed point 40 incorporated additional lengths of printed circuit track 42 to provide the necessary phase adjustments for the individual probe feeds. All the probes having one orientation are fed in phase by the network down one side of the array and all the probes having opposite orientation are fed in antiphase by the network on the other side of the array.
  • the element spacing was 115mm (0.69 at 1795MHz) and a back reflector was attached as before.
  • the array has a 3dB azimuth beamwidth of approximately 120°, a good front-to-back ratio and a low cross-polar level.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
  • Waveguide Aerials (AREA)
EP19920309808 1991-11-15 1992-10-27 Antenne à plaque plane Expired - Lifetime EP0542447B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9124291 1991-11-15
GB9124291A GB2261554B (en) 1991-11-15 1991-11-15 Flat plate antenna

Publications (2)

Publication Number Publication Date
EP0542447A1 true EP0542447A1 (fr) 1993-05-19
EP0542447B1 EP0542447B1 (fr) 1996-01-24

Family

ID=10704680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920309808 Expired - Lifetime EP0542447B1 (fr) 1991-11-15 1992-10-27 Antenne à plaque plane

Country Status (4)

Country Link
EP (1) EP0542447B1 (fr)
JP (1) JPH0645820A (fr)
DE (1) DE69207865T2 (fr)
GB (1) GB2261554B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0667649A1 (fr) * 1994-02-10 1995-08-16 Nortel Networks Corporation Antenne
EP0777294A1 (fr) * 1995-12-05 1997-06-04 Nortel Networks Corporation Dispositif de protection contre le rayonnement
EP0805515A2 (fr) * 1996-05-02 1997-11-05 Nortel Networks Corporation Dispositif d'antenne à suppression de polarisation croisée
WO1997049536A1 (fr) * 1996-06-25 1997-12-31 Northern Telecom Limited Dielectrique d'antenne
WO1998026642A2 (fr) * 1997-03-25 1998-06-25 Pates Technology Patentverwertungsgesellschaft Für Satelliten- Und Moderne Informationstechnologien Mbh Radiateur plan a large bande
WO1999066593A1 (fr) * 1998-06-17 1999-12-23 Royal Melbourne Institute Of Technology Dispositif d'antenne

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9410994D0 (en) * 1994-06-01 1994-07-20 Alan Dick & Company Limited Antennae
GB2300760A (en) 1995-04-13 1996-11-13 Northern Telecom Ltd A layered antenna
GB2299898B (en) * 1995-04-13 1999-05-19 Northern Telecom Ltd A layered antenna
US6539608B2 (en) 1996-06-25 2003-04-01 Nortel Networks Limited Antenna dielectric

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012637A1 (fr) * 1990-02-06 1991-08-22 British Telecommunications Public Limited Company Antenne
EP0445453A1 (fr) * 1990-03-07 1991-09-11 Stc Plc Antenne
EP0463649A1 (fr) * 1990-06-26 1992-01-02 Matsushita Electric Works, Ltd. Antenne plane pour ondes polarisées linéairement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1364941A (en) * 1972-01-05 1974-08-29 Secr Defence Aerials
FR2487588A1 (fr) * 1980-07-23 1982-01-29 France Etat Doublets replies en plaques pour tres haute frequence et reseaux de tels doublets
US5061943A (en) * 1988-08-03 1991-10-29 Agence Spatiale Europenne Planar array antenna, comprising coplanar waveguide printed feed lines cooperating with apertures in a ground plane

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012637A1 (fr) * 1990-02-06 1991-08-22 British Telecommunications Public Limited Company Antenne
EP0445453A1 (fr) * 1990-03-07 1991-09-11 Stc Plc Antenne
EP0463649A1 (fr) * 1990-06-26 1992-01-02 Matsushita Electric Works, Ltd. Antenne plane pour ondes polarisées linéairement

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0667649A1 (fr) * 1994-02-10 1995-08-16 Nortel Networks Corporation Antenne
EP0777294A1 (fr) * 1995-12-05 1997-06-04 Nortel Networks Corporation Dispositif de protection contre le rayonnement
US6239766B1 (en) 1995-12-05 2001-05-29 Nortel Networks Limited Radiation shielding device
EP0805515A2 (fr) * 1996-05-02 1997-11-05 Nortel Networks Corporation Dispositif d'antenne à suppression de polarisation croisée
EP0805515A3 (fr) * 1996-05-02 1999-04-21 Nortel Networks Corporation Dispositif d'antenne à suppression de polarisation croisée
WO1997049536A1 (fr) * 1996-06-25 1997-12-31 Northern Telecom Limited Dielectrique d'antenne
WO1998026642A2 (fr) * 1997-03-25 1998-06-25 Pates Technology Patentverwertungsgesellschaft Für Satelliten- Und Moderne Informationstechnologien Mbh Radiateur plan a large bande
WO1998026642A3 (fr) * 1997-03-25 1998-09-17 Pates Tech Patentverwertung Radiateur plan a large bande
US6456241B1 (en) 1997-03-25 2002-09-24 Pates Technology Wide band planar radiator
WO1999066593A1 (fr) * 1998-06-17 1999-12-23 Royal Melbourne Institute Of Technology Dispositif d'antenne

Also Published As

Publication number Publication date
DE69207865D1 (de) 1996-03-07
GB9124291D0 (en) 1992-01-08
GB2261554A (en) 1993-05-19
EP0542447B1 (fr) 1996-01-24
DE69207865T2 (de) 1996-10-02
GB2261554B (en) 1995-05-24
JPH0645820A (ja) 1994-02-18

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