EP0557176A1 - Vorrichtung zur Speisung für eine Plattenantenne mit zwei gekreuzten Polarisationen und Gruppenantenne mit einer solchen Vorrichtung - Google Patents

Vorrichtung zur Speisung für eine Plattenantenne mit zwei gekreuzten Polarisationen und Gruppenantenne mit einer solchen Vorrichtung Download PDF

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Publication number
EP0557176A1
EP0557176A1 EP93400375A EP93400375A EP0557176A1 EP 0557176 A1 EP0557176 A1 EP 0557176A1 EP 93400375 A EP93400375 A EP 93400375A EP 93400375 A EP93400375 A EP 93400375A EP 0557176 A1 EP0557176 A1 EP 0557176A1
Authority
EP
European Patent Office
Prior art keywords
line
printed circuit
ground plane
metallization
track
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
EP93400375A
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English (en)
French (fr)
Other versions
EP0557176B1 (de
Inventor
Gérard THOMSON-CSF Dubost
Roger Thomson-Csf Frin
Guy Thomson-Csf Bastard
Maurice Thomson-Csf Loiseau
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.)
Thomcast
Original Assignee
LGT Laboratoire General des Telecommunications
Thomson LGT Laboratoire General des Telecommunications
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.)
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Publication date
Application filed by LGT Laboratoire General des Telecommunications, Thomson LGT Laboratoire General des Telecommunications filed Critical LGT Laboratoire General des Telecommunications
Publication of EP0557176A1 publication Critical patent/EP0557176A1/de
Application granted granted Critical
Publication of EP0557176B1 publication Critical patent/EP0557176B1/de
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
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0075—Stripline fed arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
    • H01Q9/0457—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means electromagnetically coupled to the feed line

Definitions

  • the present invention relates to plate antennas, and more particularly relates to a supply device, or "distributor", intended for a network of plate antennas with double cross polarization, advantageously produced in printed circuits.
  • the double feed device according to the invention is specially designed to be integrated into a network which may include several hundred plate antennas.
  • one solution consisted in providing that one of the distributors, in a tree, could be on the printed circuit carrying the radiating sources and the other on another printed circuit with as many passages as radiating sources. (or group of radiating sources constituting for example resonant subnets).
  • This solution in triplate embodiment for the two distributors and tested in the Ku band, is difficult to implement when several hundred sources are envisaged.
  • it uses four juxtaposed printed circuits. Such a configuration is described in the article by G. DUBOST: “Dual Polarized Microstrip Arrays in S, C, X and Ku Bands", PIERS 1991, July 1.5, Cambridge, Massachussets (USA).
  • the invention aims to overcome the shortcomings of the known art.
  • a supply device comprising two completely independent transmission lines: a first transmission line of the triplate type and a second transmission line of the microstrip type.
  • the subject of the invention is therefore a device for feeding at least one plate antenna with double crossed polarization, characterized in that it comprises, for each source, a first line of triplate type comprising a first ground plane, a second ground plane and an elongate track parallel to a first direction and disposed between the first and second ground plan; a second microstrip type line comprising the first ground plane and an elongated track of direction perpendicular to the first direction, and in that the tracks, the first and second ground planes are arranged in four distinct planes which are parallel to each other .
  • the subject of the invention is also a network of double polarized plate antennas fitted with such a device.
  • FIG. 1 illustrates a supply device for plate antennas with double crossed polarization according to the invention.
  • Figure 1 illustrates the antenna and its feeder seen from above, by convention.
  • the top of the figure illustrates these same elements in section CC ′, that is to say in a direction parallel to one of the supply lines R which will be described later.
  • the source used S is a plate antenna, with double crossed polarization.
  • This source in a preferred embodiment of the invention, is in accordance with the main lessons of the European patent application published under the number EP-A- 0 243 289, on October 28, 1987. Reference may be made, as a non-limiting example, to the alternative embodiment shown in Figures 1 and 2 of this application. It will however be seen that the antenna is powered according to the invention only more by two triplate lines, contrary to the arrangements made in the aforementioned European patent application.
  • the source S consists of two doublets plates, folded and interlaced, metallized on the same face of a printed circuit. To allow its use in a very large number of copies in a network, it is decoupled from the metallic plane M common to all the sources using four non-conductive windows F1 to F4.
  • the main characteristic of the invention consists in supplying such a dual-polarization source using two completely independent transmission lines.
  • Three juxtaposed printed circuits CI1, CI2 and CI3 are necessary. These printed circuits can naturally consist of successive layers of a multilayer printed circuit.
  • One of the transmission lines has a T track and two ground planes M and CP.
  • the other, of the microstrip type comprises a track R and again the ground plane M.
  • the length of the two lines open at their ends is close to the quarter-wave. These lengths are noted l1 and l2 in FIG. 1.
  • the thickness of the metal plane M is large compared to the thickness of the skin (for example a thickness of printed circuit of 17.5 ⁇ m), the coupling between the two transmission lines is very weak.
  • the windows F1 to F4 are produced, for example, by removing the metallization. They are in the form of a portion of crowns, the common center O being at the point of intersection of the tracks R and T, center of the source S, when we look at the source in projection.
  • Track widths R and T are noted, respectively, w1 and w2.
  • the thicknesses of the printed circuits CI1 to CI3 have been noted in FIG. 1: H1, H2 and H3. All these parameters depend on the application envisaged or on technological choices.
  • the input impedances have been adapted using quarter-wave transformers. These were carried out either in a three-ply line for the three-ply transmission line, or in a microstrip line for the microstrip transmission line. They will be illustrated later with reference to Figures 2 and 3.
  • Table I placed at the end of this description, shows four solutions, denoted A, B, C and D, for metallizing the elements R, M, T and CP.
  • the choice is made according to data functions essentially of a technological nature, in particular the tolerances for metallization of the printed circuits and the precision necessary to ensure a good mechanical position for the coincidence of the three juxtaposed printed circuits.
  • this table it is indicated on which printed circuit and on which face of this circuit is made such a metallization element.
  • the faces denoted “face 1" are the upper faces (FIG. 1) and "face 2", the lower faces.
  • the metallization of R is carried out on the "face 1" of the printed circuit CI1, the metallization T on the "face 2" of CI2, the metallization of M on the "face 2" of CI1 and the metallization of CP on the "face 2" of CI3.
  • the circuit CI2 is simply constituted by a dielectric sheet.
  • the metallization CP, on the printed circuit CI3 can be replaced by a metal plate if one wishes a rigidity of the assembly more important.
  • the printed circuit CI3 can be replaced by a simple metal sheet and a dielectric sheet between this metal sheet and the printed circuit CI2.
  • FIGS. 2 and 3 show two resonant sub-networks of ten radiating sources each. More particularly, these subnetworks were produced according to variant denoted B in Table I.
  • FIG. 2 corresponds to the supply by triplate lines of each resonant sub-network whose directivity is maximum in the "plane E” or electrical polarization.
  • FIG. 3 corresponds, for its part, to the supply by microstrip lines of each resonant sub-network whose directivity is maximum in the "H plane” or magnetic polarization.
  • the sub-network shown is supplied by two primary lines notably comprising the tracks T10 and T20. These lines supply in turn, in a central area, two secondary lines T100 and T200 which also branch into individual supply lines from the sources.
  • the primary supply lines T10 and T20 as well as the secondary lines T100 and T200 extend parallel to the axis ⁇ between two source bands.
  • Individual lines, such as the line T204, are first of all perpendicular to ⁇ , between two contiguous sources then again parallel to ⁇ to cross the ribbon lines ( Figure 3).
  • the line T204 constitutes an example for the source S204.
  • FIG. 2 also shows adaptation transformers between the primary and secondary lines: transformers Tr10 and Tr20; and between the secondary lines and the individual supply lines, for example the transformer Tr204. They are produced in the same way as the lines themselves, that is to say in triplate technology for the part of the sub-network of FIG. 2. The role of these transformers has been specified previously in relation to the description of figure 1.
  • This configuration of tree distributors makes it possible to supply all the sources in phase, on the one hand, and on the other hand, makes it possible to obtain a balanced network due to the symmetry in the supply of the sources of the same subnet.
  • the lines T10, T20, T100, T200 and the individual supply lines such as the line T204 are produced by metallization of the "face 2" of the printed circuit CI2 ( Figure 1).
  • the ground plane M is produced by metallization of the "face 1" of this printed circuit and the ground plane CP, known as a metal counterweight, is produced by metallization of the "face 2" of the circuit CI3.
  • Figure 3 corresponds to the supply by microstrip lines.
  • the same resonant subnetwork has been represented comprising two bands of ten sources S100 to S209 distributed regularly parallel to the axis ⁇ .
  • the configuration of the microstrip lines is similar to that shown in Figure 2 for the triplate lines.
  • each source such as the source S204
  • An example is given by the line R204 (source S204).
  • FIG. 3 shows adaptation transformers T'r10, T'r20 and T'r204. They are naturally produced in microstrip type line technology.
  • This configuration of tree distributors therefore also ensures for this polarization of the sub-network a phase supply of all the sources and makes it possible to obtain a balanced network due to the symmetry of the supply.
  • the lines R10, R20, R100, R200 and the particular supply lines from sources such as the line R204 are produced by metallization of the "face 1" of the printed circuit CI1 (FIG. 1), the ground plane M being produced on the "face 1" of the printed circuit CI2 as previously indicated.
  • an array of plate antennas generally has more resonant subarrays shown in Figures 2 and 3.
  • a complete array (not shown) will typically have hundreds of plate antennas. It is obtained simply by increasing the number of sub-networks
  • the set will have the configuration of a regular matrix of n sub-networks each comprising p source.
  • a second advantage of the supply devices according to the invention is that the number of tracks of the supply lines located between two adjacent sub-networks is reduced to two. This is important to avoid unwanted couplings between lines, since the radiating source has a diameter close to 0.65 ⁇ 0 ( ⁇ 0 being the wavelength of the vacuum at the central frequency) and where the distance between adjacent sub-arrays must remain less than ⁇ 0 to avoid the lobes of the arrays.
  • the invention is not limited to the supply device described precisely.
  • sources of the type described in relation to FIG. 1, although specially adapted, can be replaced by other sources of known art insofar as they can be supplied in accordance with the teachings of the invention.
  • the invention applies more particularly to dual polarization satellite reception antennas, in particular for the reception of the DBS satellite, and more generally to the reception of television broadcasts.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
EP93400375A 1992-02-21 1993-02-16 Vorrichtung zur Speisung für eine Plattenantenne mit zwei gekreuzten Polarisationen und Gruppenantenne mit einer solchen Vorrichtung Expired - Lifetime EP0557176B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9202001 1992-02-21
FR9202001A FR2687850B1 (fr) 1992-02-21 1992-02-21 Dispositif d'alimentation pour antenne plaque a double polarisation croisee et reseau equipe d'un tel dispositif.

Publications (2)

Publication Number Publication Date
EP0557176A1 true EP0557176A1 (de) 1993-08-25
EP0557176B1 EP0557176B1 (de) 1996-10-09

Family

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Application Number Title Priority Date Filing Date
EP93400375A Expired - Lifetime EP0557176B1 (de) 1992-02-21 1993-02-16 Vorrichtung zur Speisung für eine Plattenantenne mit zwei gekreuzten Polarisationen und Gruppenantenne mit einer solchen Vorrichtung

Country Status (4)

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EP (1) EP0557176B1 (de)
AT (1) ATE144080T1 (de)
DE (1) DE69305196T2 (de)
FR (1) FR2687850B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685900A1 (de) * 1994-06-01 1995-12-06 ALAN DICK & COMPANY LIMITED Antenne
ES2122937A1 (es) * 1997-04-29 1998-12-16 Rymsa Antena de dos polarizaciones.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0243289A1 (de) * 1986-04-23 1987-10-28 ETAT FRANCAIS représenté par le Ministre des PTT (Centre National d'Etudes des Télécommunications) Plattenantenne mit zwei gekreuzten Polarisationen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239103A (ja) * 1984-05-14 1985-11-28 Japan Radio Co Ltd マイクロストリツプアレイアンテナ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0243289A1 (de) * 1986-04-23 1987-10-28 ETAT FRANCAIS représenté par le Ministre des PTT (Centre National d'Etudes des Télécommunications) Plattenantenne mit zwei gekreuzten Polarisationen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 099 (E-396)16 Avril 1986 & JP-A-60 239 103 ( NIHON MUSEN KK ) 28 Novembre 1985 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685900A1 (de) * 1994-06-01 1995-12-06 ALAN DICK & COMPANY LIMITED Antenne
US5691734A (en) * 1994-06-01 1997-11-25 Alan Dick & Company Limited Dual polarizating antennae
ES2122937A1 (es) * 1997-04-29 1998-12-16 Rymsa Antena de dos polarizaciones.

Also Published As

Publication number Publication date
DE69305196T2 (de) 1997-03-06
FR2687850A1 (fr) 1993-08-27
DE69305196D1 (de) 1996-11-14
FR2687850B1 (fr) 1994-04-15
ATE144080T1 (de) 1996-10-15
EP0557176B1 (de) 1996-10-09

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