[go: up one dir, main page]

EP0477102B1 - Richtnetzwerk mit benachbarten Strahlerelementen für Funkübertragungssystem und Einheit mit einem derartigen Richtnetzwerk - Google Patents

Richtnetzwerk mit benachbarten Strahlerelementen für Funkübertragungssystem und Einheit mit einem derartigen Richtnetzwerk Download PDF

Info

Publication number
EP0477102B1
EP0477102B1 EP91402498A EP91402498A EP0477102B1 EP 0477102 B1 EP0477102 B1 EP 0477102B1 EP 91402498 A EP91402498 A EP 91402498A EP 91402498 A EP91402498 A EP 91402498A EP 0477102 B1 EP0477102 B1 EP 0477102B1
Authority
EP
European Patent Office
Prior art keywords
directional
line
radiating
radiating element
main
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.)
Expired - Lifetime
Application number
EP91402498A
Other languages
English (en)
French (fr)
Other versions
EP0477102A1 (de
Inventor
Mostafa Jelloul
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.)
TECHNIQUE D'APPLICATION ET DE RECHERCHE ELECTRONIQUE Ste
Original Assignee
TECHNIQUE D'APPLICATION ET DE RECHERCHE ELECTRONIQUE Ste
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 TECHNIQUE D'APPLICATION ET DE RECHERCHE ELECTRONIQUE Ste filed Critical TECHNIQUE D'APPLICATION ET DE RECHERCHE ELECTRONIQUE Ste
Publication of EP0477102A1 publication Critical patent/EP0477102A1/de
Application granted granted Critical
Publication of EP0477102B1 publication Critical patent/EP0477102B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H01Q13/085—Slot-line radiating ends
    • 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
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path

Definitions

  • the present invention relates to a directional network for radiocommunications, consisting of a plurality of N adjacent radiating elements, connected in series by a main line and spaced apart by a wavelength in said main line. It also relates to a set of such directive networks.
  • the invention finds a particularly advantageous application in the field of radiocommunications antennas in the UHF band and even in the X band, when high directivity in the network plane and low directivity in the perpendicular plane are sought.
  • the plane of strong directivity will be the site plan
  • the perpendicular plane of weak directivity will be the azimuth plane.
  • a directive network for radiocommunications is known from the state of the art in accordance with the preamble, in which the adjacent radiating elements are four collinear half-wave dipoles supplied in series by a main line of impedance Zc.
  • ZT is the impedance seen at the input of the secondary lines connecting the main line to the dipoles
  • the main line can only be two-wire, because of the series supply. However, these lines have more power losses and above all radiate a large parasitic field. This is one of the drawbacks of this known directional network, another being linked to the difficulty of making the junction or transition between the high impedance two-wire main line and the low impedance coaxial secondary lines.
  • the dipoles can be supplied directly two by two by dividers by two, or one by one by a single divider by four.
  • This conventional solution has the advantage of simplicity in terms of design and can give satisfactory radio performance.
  • it has a high manufacturing cost (suitable and symmetrical dipoles with interface for attachment to a reflective mast for example) and supply of components (numerous cables and connectors, power dividers).
  • the technical problem to be solved by the object of the present invention is to propose a directive network for radiocommunications in accordance with the preamble which would make it possible to obtain, in a simple and inexpensive manner, good radioelectric characteristics, free in particular of power losses. and stray radiation.
  • said directional network is constituted by an insulating substrate on a first face of which are arranged, along a first direction, the radiating elements which are produced in thin metallic layers , each radiating element comprising a radiating slit which, starting from a short-circuited secondary line with slit of axis perpendicular to said first direction and parallel to a second direction, called main direction of propagation, widens linearly from side and on the other of said axis, in that each radiating element is isolated from an adjacent element by a line with a short-cut quarter-wave slit for decoupling, and in that said main line is a coaxial cable substantially perpendicular to each line secondary slot and provided with a central core and an outer conductive sheath, the sheath of said coaxial cable being stripped at the level of each secondary line over a length substantially equal to the width of said secondary line and connected to two points of attack on said secondary line for the first N-1 radiating
  • each radiating element comprises a capacitor constituted by a thin metallic layer deposited on a second face of the substrate, opposite to said first face.
  • This arrangement makes it possible to group the ZT impedance of a radiating element around the value 50 / N.
  • two adaptation lines are arranged on either side of said radiating slot.
  • the radiating elements are spaced apart by a wavelength in the main line, the radiating elements emit, or receive, in phase.
  • the main direction of propagation is then perpendicular to the first direction defined by the alignment of the elements along the network. It is nevertheless possible, using the directional network according to the invention, to transmit, or receive, a signal in any direction in the site map.
  • a phase shift is applied to each radiating element so as to define in the plane of said first and second directions a secondary direction of propagation different from said main direction.
  • a set of directional networks characterized in that said directional networks are arranged in a parallel and equidistant manner. of the others, and in that a phase shift is applied to each main line so as to define a direction of propagation in the plane perpendicular to said assembly.
  • Figure 1 is a side view of a directional network with adjacent radiating elements, according to the invention.
  • FIG. 2 is a side view of a current radiating element constituting the directional network of FIG. 1.
  • FIG. 3a is a front view of the radiating element of FIG. 2.
  • Figure 3b is a front view of the last radiating element.
  • FIG. 4 is an equivalent electrical diagram of the directive network of FIG. 1.
  • Figures 5 and 6 show diagrams taken in the horizontal plane, at the central frequency of the band, corresponding respectively to the main and cross polarizations.
  • Figures 7 and 8 show diagrams taken in the vertical plane, at the central frequency of the band, corresponding respectively to the main and cross polarizations.
  • FIG. 9 is a perspective view of a set of directive networks according to the invention.
  • FIG. 1 shows, in side view, a directive network 10 for radiocommunications, fixed for example to a cylindrical or square mast 100 serving as support and possibly reflector for the network so as to conform the directivity in the horizontal plane to the intended application.
  • the radiating elements 200 i are spaced by a wavelength ⁇ g in the main line 300, also called guided wavelength.
  • the guided wavelength ⁇ g for a cable with a teflon dielectric is approximately 0.7 ⁇ or 224 mm.
  • FIGS 1, 2 and 3 show that said directional network is constituted by an insulating substrate 400, in epoxy glass for example, on a first face of which are arranged, along a first direction D1, the radiating elements 200 i produced in thin metal layers, using printed circuit technology.
  • Each radiating element 200 i comprises a radiating slot 210 i which, from a short-circuited secondary line 220 i with slot of axis d 2i perpendicular to the first direction D1 and parallel to a second direction D2, called main direction of propagation, flares linearly on both sides of said axis d 2i .
  • each element 200 i has at least one line 230 i with quarter-wave slot short-circuited for decoupling.
  • the thin film technology used as well as the configuration chosen for the radiant slit 210 i and the secondary line 220 i with short-circuited slit allow a relatively low slit impedance Zf to be obtained which makes it possible to use a semi coaxial cable.
  • -rigid classic as secondary line 300 said coaxial cable being provided with a central core 320 and an outer conductive sheath 310.
  • each radiating element 220 i comprises a capacitor 240 i constituted by a thin metallic layer disposed on a second face of the insulating substrate 400, opposite said first face, at the location of the attack points A, B of the secondary line 220 i .
  • This capacitor with a few picofarads of capacitance, has an impedance Z1, in parallel with the slit impedance Zf, as indicated by the equivalent diagram in FIG. 4.
  • stubs of adaptation 251 i and 252 i on either side of the radiant slot 210 i .
  • these two adaptation stubs have a length equal to or slightly greater than ⁇ / 4.
  • the adaptation lines 251 i and 252 i can be folded symmetrically so as to avoid the creation of a parasitic cross field.
  • the Z2 impedance produced by the adaptation stubs helps to adapt the ZT impedance seen at the input of the secondary lines.
  • a transformer 500 quarter wave of adequate ratio preferably low, is placed at the end of the main line 300.
  • the directional network according to the invention takes on the appearance of a metallized substrate plate of very small thickness, the height of which is of the order of N ⁇ g and the width of which is substantially greater than or equal to ⁇ g / 4.
  • the transition between the coaxial cable and the slotted secondary line 220 i is obtained, as shown in FIG. 3a, by stripping the sheath 310 of the cable at each secondary line over a length substantially equal to the width. of said secondary line and by welding, for example, said sheath in two points of attack A, B of said secondary line for the first N-1 radiating elements.
  • FIG. 3b shows that the sheath 310 and the central core 320 are respectively connected to the points of attack A and B so as to produce a short circuit at the end of the line and thus electrically close the circuit.
  • Figures 5 and 6 show the diagrams noted by the Applicant in the horizontal plane at the central frequency Fo of the band for respectively main and cross polarizations.
  • the directivity of the main patterns is low, the attenuation to ⁇ 90 ° of the main direction of radiation being only of the order of 5 dB, which is for example very favorable to the omnidirectionality of the horizontal diagrams in a circular network association of several (2, 4 or 8) directional networks according to the invention.
  • Figures 7 and 8 show, similarly, the diagrams recorded at the central frequency Fo in the vertical plane D1, D2 containing the network, for respectively main and cross polarizations. It should be noted that the cross polarization is expanded by 10 dB relative to the corresponding main polarization. Examination of these vertical diagrams shows that the 3 dB beam opening is close to 17 °, which corresponds to the well-known approximate formula: ⁇ 3db # 51 ⁇ L L being the total length of the directional network.
  • a deviation of the beam from the horizon is foreseeable due to the very principle of the series connection of the radiating elements.
  • Fo the depointing is zero because all the slits are in phase and the wavefront is vertical.
  • the network according to the invention is not a traveling wave but rather a standing wave and the inclination of the wave front is less, depending in fact on the individual impedances of the slots, the couplings between the slots and other diffraction phenomena.
  • the main direction of propagation D2 is perpendicular to the direction D1 of the network.
  • D1 the direction of propagation in the plane D1, D2 (vertical plane)
  • Figure 9 shows a set of P directional networks 10 j with j varying from 1 to P arranged in a parallel and equidistant from each other.
  • a phase shift is applied to each main line 300 j .
  • An azimuth scan is obtained by electronically varying this phase shift.
  • the isotropic gain of a directional array according to the invention was measured by comparison with a standard antenna.
  • the gain value is very close to 10 dBi. This is simply explained by the fact that four aligned radiating elements, each having approximately 2 dBi of gain, and forming a linear array arranged at a quarter wave distance in front of a reflective mast providing an additional gain close to 3dBi, provide a gain 11 dBi. If one takes into account technological losses and losses by reflection at the entry of the network and, on the other hand, that the reflective mast is not infinite, one justifies the measured value.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)

Claims (6)

  1. Richtnetzwerk (10) für Funkübertragungen, mit einer Mehrzahl von N benachbarten Strahlerelementen (200i), welche mittels einer Hauptleitung (300) seriell verbunden sind und auf dieser Hauptleitung mit einem Abstand von einer Wellenlänge (λg) angeordnet sind, dadurch gekennzeichnet, daß das Richtnetzwerk aus einem isolierenden Substrat (400) gebildet ist, bei dem auf einer ersten Seite längs einer ersten Richtung (D₁) die Strahlerelemente (200i) angeordnet sind, welche als dünne Metallschichten realisiert sind, wobei jedes Strahlerelement einen Strahlerschlitz (210i) aufweist, der ausgehend von einer Nebenleitung (220i), die zu dem Schlitz kurzgeschlossen ist, dessen Achse (d2i) senkrecht zu der ersten Richtung (D₁) und parallel zu einer zweiten Richtung (D₂), die Hauptausbreitungsrichtung genannt wird, verläuft, sich zu beiden Seiten der Achse (d2i) linear erweitert, daß jedes Strahlerelement (200i) von jedem benachbarten Element durch eine Viertelwellen-Schlitzleitung (230i) isoliert die welche zur Entkopplung kurzgeschlossen ist, daß die Hauptleitung (300) ein koaxiales Kabel ist, welches im wesentlichen senkrecht zu jeder Nebenleitung (220i) im Schlitz verläuft und eine zentrale Seele (320) sowie einen leitenden Außenmantel (310) aufweist, wobei der Mantel des koaxialen Kabels auf der Höhe jeder Nebenleitung über eine Länge entfernt ist, welche im wesentlichen gleich der Breite der Nebenleitung ist, und mit zwei Angriffspunkten (A, B) an dieser Nebenleitung (220i) für die N-1 ersten Strahlerelemente verbunden ist, wobei der Mantel (310) und die zentrale Seele (320) des koaxialen Kabels jeweils mit dem einen bzw. mit dem anderen Angriffspunkt für das N-te und das letzte Strahlerelement verbunden sind.
  2. Richtnetzwerk für Funkübertragungen nach Anspruch 1, dadurch gekennzeichnet, daß das koaxiale Kabel (300) bei den Angriffspunkten (A, B) an der Nebenleitung (220i) für das erste Strahlerelement von einem Viertelwellen-Transformator (500) abgeschlossen ist.
  3. Richtnetzwerk für Funkübertragungen nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß jedes Strahlerelement (200i) einen Kondensator (240i) aufweist, welcher von einer dünnen Metallschicht gebildet wird, die auf einer zweiten Seite des Substrats, der ersten Seite gegenüberliegend aufgebracht ist.
  4. Richtnetzwerk für Funkübertragungen nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zwei Anpassungsleitungen (251i, 252i) zu beiden Seiten des Strahlerschlitzes (210i) jedes Strahlerelementes angeordnet sind.
  5. Richtnetzwerk für Funkübertragungen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß an jedes Strahlerelement (200i) eine Phasenverschiebung angelegt wird, indem in der Ebene der ersten (D₁) und der zweiten (D₂) Richtungen eine Nebenausbreitungsrichtung definiert wird, welche sich von der Hauptrichtung (D₂) unterscheidet.
  6. Anordnung von P Richtnetzwerken nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Richtnetzwerke (10j) parallel und mit gleichem Abstand zueinander angeordnet sind und daß eine Phasenverschiebung an jede Hauptleitung (300j) angelegt wird, indem eine Ausbreitungsrichtung in einer zu dieser Anordnung senkrechten Ebene (P) definiert wird.
EP91402498A 1990-09-21 1991-09-19 Richtnetzwerk mit benachbarten Strahlerelementen für Funkübertragungssystem und Einheit mit einem derartigen Richtnetzwerk Expired - Lifetime EP0477102B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9011672A FR2667198B1 (fr) 1990-09-21 1990-09-21 Reseau directif pour radiocommunications, a elements rayonnants adjacents et ensemble de tels reseaux directifs.
FR9011672 1990-09-21

Publications (2)

Publication Number Publication Date
EP0477102A1 EP0477102A1 (de) 1992-03-25
EP0477102B1 true EP0477102B1 (de) 1995-03-15

Family

ID=9400522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402498A Expired - Lifetime EP0477102B1 (de) 1990-09-21 1991-09-19 Richtnetzwerk mit benachbarten Strahlerelementen für Funkübertragungssystem und Einheit mit einem derartigen Richtnetzwerk

Country Status (4)

Country Link
US (1) US5202698A (de)
EP (1) EP0477102B1 (de)
DE (1) DE69108155T2 (de)
FR (1) FR2667198B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5309165A (en) * 1992-05-09 1994-05-03 Westinghouse Electric Corp. Positioner with corner contacts for cross notch array and improved radiator elements
DE19732503A1 (de) * 1997-07-29 1999-02-04 Alsthom Cge Alcatel Anordnung zur Übertragung, zur Abstrahlung und zum Empfang von Hochfrequenz-Signalen
JP2009516975A (ja) * 2005-11-23 2009-04-23 セレックス センサーズ アンド エアボーン システムズ リミテッド アンテナ
US7719385B2 (en) * 2006-09-28 2010-05-18 Sunwoo Communication Co., Ltd Method and divider for dividing power for array antenna and antenna device using the divider
US9155531B2 (en) 2013-03-15 2015-10-13 Smith & Nephew, Inc. Miniaturized dual drive open architecture suture anchor
TWM568509U (zh) * 2018-07-12 2018-10-11 明泰科技股份有限公司 具有低姿勢與雙頻高隔離度之天線模組

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1565266A1 (de) * 1965-06-18 1970-02-05 Fried. Krupp Gmbh, 4300 Essen Querstrahler
FR2490026A1 (fr) * 1980-09-09 1982-03-12 Thomson Csf Antenne reseau non dispersive et son application a la realisation d'une antenne a balayage electronique
US4353072A (en) * 1980-11-24 1982-10-05 Raytheon Company Circularly polarized radio frequency antenna
GB2194681B (en) * 1986-08-29 1990-04-18 Decca Ltd Slotted waveguide antenna and array
US4843403A (en) * 1987-07-29 1989-06-27 Ball Corporation Broadband notch antenna
GB2220303A (en) * 1988-06-29 1990-01-04 Philips Electronic Associated Dual polarised phased array antenna
US5023623A (en) * 1989-12-21 1991-06-11 Hughes Aircraft Company Dual mode antenna apparatus having slotted waveguide and broadband arrays

Also Published As

Publication number Publication date
FR2667198A1 (fr) 1992-03-27
DE69108155T2 (de) 1995-09-21
DE69108155D1 (de) 1995-04-20
FR2667198B1 (fr) 1993-08-13
US5202698A (en) 1993-04-13
EP0477102A1 (de) 1992-03-25

Similar Documents

Publication Publication Date Title
EP0205212B1 (de) Modulare Mikrowellenantenneneinheiten und Antenne mit solchen Einheiten
EP0064313B1 (de) Mikrowellenstrahlerelement für Zirkularpolarisation und ebene Mikrowellenantenne mit einer Gruppe solcher Elemente
EP0108463B1 (de) Strahlelement für orthogonal polarisierte Signale und flache Antennengruppe mit solchen nebeneinandergestellten Elementen
EP0213646B1 (de) Modulare Mikrowellenantenneneinheiten und Antenne mit solchen Einheiten
EP0243289B1 (de) Plattenantenne mit zwei gekreuzten Polarisationen
EP0481417B1 (de) Vorrichtung zur Speisung eines Strahlungselementes für zwei orthogonale Polarisationen
EP0315141B1 (de) Anregungsvorrichtung einer zirkularpolarisierten Welle mit einer Flachantenne in einem Hohlleiter
EP0924797B1 (de) Multifrequenzstreifenleitungsantenne und Gerät mit einer derartigen Antenne
FR2669776A1 (fr) Antenne hyperfrequence a fente a structure de faible epaisseur.
EP0012055B1 (de) In Streifenleitertechnik ausgeführter Monopulsprimärstrahler und Antenne mit einem solchen Strahler
FR2583226A1 (fr) Antenne omnidirectionnelle cylindrique
EP0667984B1 (de) Monopolantenne mit platten- und stabstrahlern
FR2810163A1 (fr) Perfectionnement aux antennes-sources d'emission/reception d'ondes electromagnetiques
FR2751471A1 (fr) Dispositif rayonnant a large bande susceptible de plusieurs polarisations
FR2645353A1 (fr) Antenne plane
WO2016023919A1 (fr) Source multibande a cornet coaxial avec systemes de poursuite monopulse pour antenne a reflecteur
EP0430745A1 (de) Zirkular polarisierte Antenne, insbesondere für Gruppenantenne
EP0477102B1 (de) Richtnetzwerk mit benachbarten Strahlerelementen für Funkübertragungssystem und Einheit mit einem derartigen Richtnetzwerk
EP1305846B1 (de) Doppelpolarisierter aktiver mikrowellenreflektor, insbesondere für antenne mit elektronischer strahlschwenkung
EP0377155B1 (de) Doppelfrequenz strahlende Vorrichtung
EP0520908B1 (de) Lineare Gruppenantenne
EP2432072B1 (de) Breitband-Symmetrieüberträger auf mehrlagigem Schaltkreis für eine Netzantenne
FR2552273A1 (fr) Antenne hyperfrequence omnidirectionnelle
EP0585250B1 (de) Rundstrahlende, gedruckte Zylinderantenne und Seeradar-Antwortgerät mit derartigen Antennen
EP3900113B1 (de) Elementare mikrostreifenantenne und gruppenantenne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19920713

17Q First examination report despatched

Effective date: 19940517

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69108155

Country of ref document: DE

Date of ref document: 19950420

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950327

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000919

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000928

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20001014

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010919

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020501

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010919

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST