EP0550320B1 - Wellenleiter mit geraden strahlenden Schlitzen, angeregt durch metallische Einsätze - Google Patents

Wellenleiter mit geraden strahlenden Schlitzen, angeregt durch metallische Einsätze Download PDF

Info

Publication number
EP0550320B1
EP0550320B1 EP92403491A EP92403491A EP0550320B1 EP 0550320 B1 EP0550320 B1 EP 0550320B1 EP 92403491 A EP92403491 A EP 92403491A EP 92403491 A EP92403491 A EP 92403491A EP 0550320 B1 EP0550320 B1 EP 0550320B1
Authority
EP
European Patent Office
Prior art keywords
waveguide
slots
flaps
guide
slot
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
EP92403491A
Other languages
English (en)
French (fr)
Other versions
EP0550320A1 (de
Inventor
Daniel Thomson-Csf Caer
Jean Thomson-Csf Le Foll
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0550320A1 publication Critical patent/EP0550320A1/de
Application granted granted Critical
Publication of EP0550320B1 publication Critical patent/EP0550320B1/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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0037—Particular feeding systems linear waveguide fed arrays
    • H01Q21/0043—Slotted waveguides

Definitions

  • the present invention relates to a guide with non-inclined radiating slots of the type comprising slots perpendicular to the axis of the guide, cut on a small side of the guide with a spacing substantially but not exactly equal to a half wavelength of operation in the guide, and means for exciting each of these slots.
  • Slotted guides are frequently used as linear arrays of radiating sources in array antennas, for example in radar. Their advantages are low cost and low losses. To obtain a radiation close to normal to the guide and a good adaptation, it is necessary on the one hand a distance between successive slits close to ⁇ g / 2, where ⁇ g is the wavelength in the guide, and on the other hand an additional phase shift of ⁇ between two consecutive slots.
  • slots arranged on the long side of a rectangular section guide or on the short side have several drawbacks and in particular a large pitch between successive guides, which limits the scanning angle of the beam in a plane perpendicular to the guides. We therefore prefer to use slots on the short side of the guides.
  • a first solution therefore consists in tilting the slots alternately on one side and on the other to obtain the necessary conditions specified above.
  • this solution has the drawback, due to the inclination of the slits, of radiating a cross-polarized component which can reach levels incompatible with proper functioning of the antenna using these guides.
  • Another known solution then consists in using non-inclined slots (perpendicular to the axis of the guide) and in exciting them by means of an obstacle placed in the guide (iris, stems).
  • US Patent 4,435,715 (Hughes Aircraft) describes a guide with non-inclined slits in which the excitation of a slit is obtained by placing conductive rods on either side of the slit. Each rod is arranged between an edge of the slot and one of the long sides of the guide.
  • a solution has the drawback of being costly to produce. Indeed, it is necessary to individually fix the rods inside the guide, for example by welding in a bath.
  • the use of rods has significant drawbacks from the microwave point of view. Indeed, this solution has a certain frequency selectivity, hence a limited bandwidth and a relatively unsatisfactory standing wave rate (TOS).
  • TOS standing wave rate
  • the coupling by rods involves the use of relatively wide slots, hence a residual level of cross-polarization which can be troublesome for certain applications.
  • the invention relates to a slotted guide overcomes these drawbacks through the use of metal shutters to excite each slot.
  • a guide with non-inclined radiating slots of the type comprising slots perpendicular to the axis of the guide, cut on a small side of the guide with a spacing substantially but not exactly equal to half a length d operating wave in the guide, and means for excitation of each of these slots, characterized in that said excitation means consist of at least one metal flap inserted in the guide along a long side of the guide and of said short side carrying the slots, in a position adjacent to the associated slot and extending in a plane parallel to that of the slot.
  • Figures 1 and 2 show a waveguide 1 comprising, cut on the short side, radiating slots 2, 3 not inclined, that is to say perpendicular to the longitudinal axis of the guide. As already mentioned, such slots are normally not coupled to the energy propagating in the guide 1 and therefore do not radiate.
  • flaps 21, 22, 31, 32 are here of triangular shape. They are arranged and welded into mounting slots cut in the guide and of adequate depth, perpendicular to the walls of the guide.
  • the flaps are associated with the slots 2, 3 in pairs, respectively 21-22, 31-32 and arranged adjacent to the associated slots and on either side thereof.
  • Each flap is located in the guide against the short side carrying the slots and one of the long sides of the guide.
  • the radiating slits are spaced apart by a pitch substantially equal to ⁇ g / 2, where ⁇ g is the wavelength of operation in the guide.
  • ⁇ g is the wavelength of operation in the guide.
  • the metal shutters are all cut to form similar right triangles whatever their size and therefore have the same angle ⁇ .
  • This has been symbolized in FIG. 1 by showing in dotted lines a larger flap 21 ′ with the same angle ⁇ .
  • the advantage of such a characteristic is that, during manufacture, all of the shutter mounting slots can be obtained by orienting the guide by rotation about its axis by a given fixed angle relative to the machine tool. .
  • the angle ⁇ is chosen to obtain an optimum adaptation in the guide and can, for example, be of the order of 30 °.
  • the metal shutters constitute obstacles in the guide and necessarily produce reflections of part of the energy which propagates there. It is clear that, when the spacing between homologous components is equal to ⁇ g / 2, the reflected energies are added and there is a sharp degradation of the TOS. When it is desired to operate in a given frequency band, it is therefore necessary to provide the guide with a spacing of the radiating slots such that, either this spacing is less than ⁇ g / 2 for all the frequencies of the band, or else it is greater than ⁇ g / 2 for all band frequencies. In practice, the first solution is preferred, because when the spacing is greater than ⁇ g / 2, there is a risk of seeing annoying lobes of the network appear.
  • the coupling of a radiating slit is adjustable by the size of the flaps and by their spacing at the slit.
  • One of the great advantages of metal shutters is that they can be placed right at the edge of the radiating slots (unlike the rods) and that it is in this position that the widest bandwidth is obtained.
  • the metal shutters are less selective than, for example, rods or irises. We therefore obtain a wider bandwidth and a better TOS.
  • a major advantage is that, in addition, it has been found that, with metal shutters as excitation devices, the radiating slots used could be much narrower, up to 50% narrower. However, this is essential for the performance of a rectilinearly polarized antenna using such slot guides since this results in a significant reduction in cross polarization.

Landscapes

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

Claims (6)

  1. Wellenleiter mit nicht geneigten Schlitzstrahlern des Typs, der versehen ist mit zur Achse des Wellenleiters senkrechten Schlitzen, die in einer kurzen Seite des Wellenleiters mit einem Abstand ausgeschnitten sind, der im wesentlichen, jedoch nicht genau gleich einer halben Betriebswellenlänge im Wellenleiter ist, sowie mit Mitteln zum Erregen jedes dieser Schlitze, dadurch gekennzeichnet, daß die Erregungsmittel durch wenigstens eine Metallplatte (21, 22, 31, 32) gebildet sind, die in den Wellenleiter längs einer langen Seite des Wellenleiters und der die Schlitze tragenden kurzen Seite an einer Position eingeschoben sind, die an den zugeordneten Schlitz angrenzt, und sich in einer zu den Wänden des Wellenleiters senkrechten Ebene erstreckt.
  2. Schlitz-Wellenleiter nach Anspruch 1, dadurch gekennzeichnet, daß die Erregungsmittel für jeden Schlitz zwei Metallplatten (21, 22; 31, 32) enthalten, die in bezug auf die Mittelachse(P) des zugeordneten Schlitzes symmetrisch sind, wobei ihre relative Positionierung von einem Schlitz zum nächsten umgekehrt ist.
  3. Schlitz-Wellenleiter nach einem der Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß die Platten eine dreieckige Form besitzen.
  4. Schlitz-Wellenleiter nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Größe der Platten innerhalb des Wellenleiters durch die Kopplung bestimmt ist, die zwischen der im Wellenleiter sich ausbreitenden Welle und dem zugeordneten Schlitz herzustellen ist, und daß alle Platten die Form ähnlicher Dreiecke besitzen.
  5. Schlitz-Wellenleiter nach Anspruch 4, dadurch gekennzeichnet, daß der Wellenleiter Anbringungsschlitze enthält, deren Ebene zu den Wänden des Wellenleiters senkrecht ist und die im gleichen Bearbeitungswinkel ausgeschnitten sind, um das Einschieben der Platten in den Wellenleiter zu ermöglichen.
  6. Schlitz-Wellenleiter nach irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Abstand zwischen der Ebene einer Platte und dem zugeordneten Schlitz und die Größe der Platte in Abhängigkeit von der Kopplung bestimmt sind, die zwischen der im Wellenleiter sich ausbreitenden Welle und dem zugeordneten Schlitz herzustellen ist.
EP92403491A 1991-12-31 1992-12-21 Wellenleiter mit geraden strahlenden Schlitzen, angeregt durch metallische Einsätze Expired - Lifetime EP0550320B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9116384 1991-12-31
FR9116384A FR2685820B1 (fr) 1991-12-31 1991-12-31 Guide a fentes rayonnantes non inclinees excitees par des volets metalliques.

Publications (2)

Publication Number Publication Date
EP0550320A1 EP0550320A1 (de) 1993-07-07
EP0550320B1 true EP0550320B1 (de) 1996-11-13

Family

ID=9420705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92403491A Expired - Lifetime EP0550320B1 (de) 1991-12-31 1992-12-21 Wellenleiter mit geraden strahlenden Schlitzen, angeregt durch metallische Einsätze

Country Status (5)

Country Link
US (1) US5422652A (de)
EP (1) EP0550320B1 (de)
CA (1) CA2085453A1 (de)
DE (1) DE69215202T2 (de)
FR (1) FR2685820B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3336733B2 (ja) * 1994-04-07 2002-10-21 株式会社村田製作所 移動手段用通信モジュール
CN103326125B (zh) * 2013-06-29 2015-02-25 中国人民解放军国防科学技术大学 一维可扫波导窄边缝隙天线
JP6752394B2 (ja) * 2018-05-02 2020-09-09 三菱電機株式会社 導波管スロットアレーアンテナ
CN118435455A (zh) 2021-12-23 2024-08-02 灏讯有限公司 天线装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574433A (en) * 1943-10-01 1951-11-06 Roger E Clapp System for directional interchange of energy between wave guides and free space
US2818565A (en) * 1956-09-05 1957-12-31 James S Ajioka Slab excited continuous slot antenna
US3004259A (en) * 1958-07-21 1961-10-10 Hughes Aircraft Co Electrically variable waveguide slot with longitudinal polarization
US4435715A (en) * 1980-09-29 1984-03-06 Hughes Aircraft Company Rod-excited waveguide slot antenna
FR2654555B1 (fr) * 1989-11-14 1992-06-19 Thomson Csf Guide a fentes rayonnantes non inclinees a excitation par motif rayonnant.
US5030965A (en) * 1989-11-15 1991-07-09 Hughes Aircraft Company Slot antenna having controllable polarization

Also Published As

Publication number Publication date
DE69215202T2 (de) 1997-03-27
DE69215202D1 (de) 1996-12-19
US5422652A (en) 1995-06-06
FR2685820B1 (fr) 1994-03-18
CA2085453A1 (fr) 1993-06-22
EP0550320A1 (de) 1993-07-07
FR2685820A1 (fr) 1993-07-02

Similar Documents

Publication Publication Date Title
EP3547450B1 (de) Strahlungselement mit kreispolarisierung, bei dem eine resonanz in einem fabry-perot-interferometer angewandt wird
EP0205212B1 (de) Modulare Mikrowellenantenneneinheiten und Antenne mit solchen Einheiten
EP0013222B1 (de) Diodenphasenschieber für Mikrowellen und elektronisch abtastende Antenne mit einem solchen Schieber
FR2556510A1 (fr) Antenne periodique plane
FR2552938A1 (fr) Dispositif rayonnant a structure microruban perfectionnee et application a une antenne adaptative
EP0082751B1 (de) Mikrowellenstrahler und seine Verwendung für eine Antenne mit elektronischer Abtastung
EP0074311A1 (de) Rechteckhohlleiterschlitzantenne für breiten Frequenzbereich
EP3113286B1 (de) Quasioptischer strahlformer mit linse, und flachantenne, die einen solchen strahlformer umfasst
EP3664214B1 (de) Mehrfachzugriff strahlelemente
FR2572592A1 (fr) Antenne en nappe pour micro-ondes
EP3435480A1 (de) Antenne mit integrierten verzögerungslinsen im innern eines verteilers auf der basis von wellenleiterteilern mit parallelen platten
EP0117803B1 (de) Breitbandiger primärer Mikrowellenhornstrahler und Antenne mit einem solchen primären Strahler
EP0550320B1 (de) Wellenleiter mit geraden strahlenden Schlitzen, angeregt durch metallische Einsätze
FR2704358A1 (fr) Duplexeur de polarissation à guide d'ondes.
EP0439970B1 (de) Geschlitzter Hohlleiterstrahler mit quer verlaufenden Schlitzen, die von gedruckten, leitenden Mustern erregt werden
CA2814281C (fr) Cornet d'antenne a grille corruguee
EP0149400B1 (de) Strahler mit einer Zirkularmoduserregungsvorrichtung
EP0467818B1 (de) Übergangsstück zwischen elektromagnetischen Hohlleitern, insbesondere zwischen einem Rundhohlleiter und einem Koaxialhohlleiter
EP0110479B1 (de) Dünne Doppelstrahlerrichtantenne für Mikrowellen
EP0605338A1 (de) Streifenleitungsantenne mit zwei Polarisationen und entsprechende Vorrichtung zum Senden/Empfangen
EP0337841A1 (de) Unsymmetrisch gespeiste breitbandige Sendeantennenschleife und Antennenfeld aus einer Vielzahl dieser Schleifen
FR2470457A1 (fr) Antenne a reseau a fentes avec distribution d'amplitude dans une petite ouverture circulaire
FR2638288A1 (fr) Antenne a fentes
EP0093058B1 (de) Mikrowellen-Speisevorrichtung für rotationssymmetrischen Doppelbanderreger mit Rillen
EP3306746B1 (de) Strahlungselement in einem hohlraum, und strahlungsnetz, das mindestens zwei strahlungselemente umfasst

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 IT

17P Request for examination filed

Effective date: 19931220

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: THOMSON-CSF

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19960202

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

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 IT

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 69215202

Country of ref document: DE

Date of ref document: 19961219

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

Effective date: 19970123

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

Ref country code: DE

Payment date: 20001122

Year of fee payment: 9

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

Ref country code: GB

Payment date: 20001124

Year of fee payment: 9

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

Ref country code: FR

Payment date: 20001221

Year of fee payment: 9

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: 20011221

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: 20020702

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

Effective date: 20011221

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: 20020830

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051221