EP0762529B1 - Iris-Polarisator für Antennenprimärstrahler - Google Patents

Iris-Polarisator für Antennenprimärstrahler Download PDF

Info

Publication number
EP0762529B1
EP0762529B1 EP19960401830 EP96401830A EP0762529B1 EP 0762529 B1 EP0762529 B1 EP 0762529B1 EP 19960401830 EP19960401830 EP 19960401830 EP 96401830 A EP96401830 A EP 96401830A EP 0762529 B1 EP0762529 B1 EP 0762529B1
Authority
EP
European Patent Office
Prior art keywords
waveguide section
polariser
screws
irises
frequency band
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
EP19960401830
Other languages
English (en)
French (fr)
Other versions
EP0762529A1 (de
Inventor
Jean-Yves Morineau
Serge Bazzani
Bernard Jamet
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 EP0762529A1 publication Critical patent/EP0762529A1/de
Application granted granted Critical
Publication of EP0762529B1 publication Critical patent/EP0762529B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/165—Auxiliary devices for rotating the plane of polarisation
    • H01P1/17—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
    • H01P1/173—Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation using a conductive element

Definitions

  • the present invention relates to an iris polarizer for primary antenna source.
  • the polarizer is of the iris type, that is to say that it has inside a waveguide section a succession of regularly reactive elements spaced. These reactive elements are often conductive strips symmetrically entering the waveguide section and located in transverse planes, that is to say perpendicular to the longitudinal axis.
  • An object of the invention is therefore a polarizer free of these disadvantages thanks to a simple possibility of adjustment and adaptation to a given frequency band.
  • an iris polarizer for source antenna primary of the type including a waveguide section longitudinal with a succession of regularly reactive elements spaced apart forming irises and acting as capacitive susceptances or inductive according to the direction of the linear polarization of the field electric inside said waveguide section, as defined in the revendications.
  • Figure 1 schematically represents a primary source known antenna such as those mentioned above.
  • This source 1 includes a transition 2 to a section of waveguide 3 of a polarizer.
  • the waveguide can be of section square, rectangular or circular.
  • the simplest solution that has been shown here is the circular section.
  • This waveguide section 3 comprises a succession of reactive elements 5 which are irises. We prefer often use irises although screw solutions or quartz blades by example can be used.
  • the iris solution is more efficient, better suited to large powers and above all requires fewer elements than the other reactive element solutions because an iris can have both capacitive and inductive susceptibility, hence a greater simplicity.
  • An iris may consist of two conductive flaps penetrating at inside the guide symmetrically to the longitudinal axis of the guide and arranged in a transverse plane perpendicular to this axis.
  • the waveguide section 3 can be rotated by a geared motor assembly 4 (hence the advantage of a circular guide) of so that it rotates 45 °.
  • Section 3 is followed by a transformer 6 then a phase shifter 7 connected to a horn 8.
  • Figures 2a and 2b show the equivalent diagram of an iris 5 for a square or circular guide depending on the polarization direction of the field electric.
  • the iris comprises two conducting flaps 51 and 52 in a plane transverse to guide 3 and entering the guide of a given height h.
  • susceptance B VS is capacitive.
  • the susceptance B L is inductive.
  • guide section 3 is rotated 45 ° by compared to the electric field having the direction of figure 2a or 2b, one can consider the incident wave as decomposable into two components orthogonal of the same amplitude, one of which is parallel to the edges of the iris and the other perpendicular to these same edges. If the polarizer requires these two components a 90 ° differential phase shift, we obtain at output a wave with circular polarization.
  • the dimensions of the guide (side d of a square guide for example) and sinking h of the irises are provided.
  • a sinking law for the different irises which can be a law in cosine or according to a distribution of Tchebychev and which allows to minimize the TOS in the operating band.
  • Figure 3 shows the variations in capacitive susceptances (BC curve) and inductive (BL curve) of all the irises as a function of the frequency.
  • the capacitive susceptance is inversely proportional to the wavelength in the guide.
  • This value is proportional to the wavelength in the guide.
  • the first term depends on the size of the guide and the depth of the iris; the second term depends on the size of the guide and the frequency.
  • FIG. 6 represents the diagram of a polarizer according to the invention.
  • This polarizer comprises a waveguide section (3), circular in the example described, of diameter d determined approximately.
  • irises 5 are placed whose sinking h n is determined from d : the sinking h n of the irises obeys a law which can be a Chebyshev distribution to obtain the best possible TOS in the band. The whole is adjusted to also obtain a differential phase shift substantially equal to 90 °.
  • the screws for example inside the guide are arranged towards one end of the guide 3, where the irises are the least depressed, so to guarantee the best power handling.
  • the screws have been arranged in the median plane P of the irises containing the axis 32, that is to say the plane of the figure for the longitudinal section.
  • the traces of plane P and the orthogonal plane P 'passing through the longitudinal axis 32 have been shown on the cross section passing through the screws 30 of FIG. 6.
  • FIGS. 10 to 12 illustrate the case where the section of the waveguide 3 and therefore the dimension d are too large.
  • the solid lines correspond to the results in the absence of screws.
  • We end up here with a shift towards the low frequencies.
  • curves BC and BL of FIG. 10 a dispersion towards the high frequencies of the capacitive and inductive suceptances due to the irises and a lower slope for the inductive susceptance.
  • the invention is in no way limited to the examples of realization described.

Landscapes

  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
  • Polarising Elements (AREA)
  • Waveguide Aerials (AREA)

Claims (7)

  1. Iris-Polarisator für Antennenprimärstrahler des Typs, der einen longitudinalen Wellenleiterabschnitt (3) umfaßt, der eine Folge von regelmäßig beabstandeten Blindleistungselementen (5) enthält, die Irisblenden bilden und je nach Richtung der linearen Polarisation des elektrischen Feldes in dem Wellenleiterabschnitt als kapazitive oder induktive Suszeptanzen wirken, dadurch gekennzeichnet, daß vorgesehen ist, in dem Wellenleiterabschnitt ergänzend zu den Irisblenden einstellbare Elemente (30, 31) anzuordnen, die eine Suszeptanz aufweisen, die im wesentlichen von einem gegebenen Typ, kapazitiv oder induktiv, ist, so daß das Betriebsfrequenzband des Polarisators unter Aufrechterhaltung der differentiellen Phasenverschiebung des Polarisators auf im wesentlichen 90° im Frequenzband rezentriert wird, so daß der Elliptizitätsanteil der Welle am Ausgang des Polarisators minimal ist.
  2. Polarisator nach Anspruch 1, dadurch gekennzeichnet, daß die einstellbaren Elemente durch Schrauben oder Stäbe gebildet sind, deren Eindringtiefe in den Leiterabschnitt (3) einstellbar ist.
  3. Polarisator nach Anspruch 2, in dem die Blindleistungselemente (5) jeweils aus zwei leitenden Klappen gebildet sind, die in einer zum longitudinalen Leiterabschnitt transversalen Ebene mit einer gegebenen Höhe (hn) symmetrisch in den Leiterabschnitt (3) eindringen, dadurch gekennzeichnet, daß die einstellbaren Elemente durch wenigstens zwei Paare von Schrauben (30, 31) gebildet sind, deren Höhe einstellbar ist, wobei die Schrauben jedes Paars in bezug auf die longitudinale Symmetrieachse (32) des Wellenleiterabschnitts (3) symmetrisch angeordnet sind und der Abstand zwischen den beiden Paaren längs der Achse im wesentlichen gleich einem ungeradzahligen Vielfachen eines Viertels der Wellenlänge im Leiterabschnitt bei der Mittenfrequenz des Betriebsfrequenzbandes ist.
  4. Polarisator nach Anspruch 3, dadurch gekennzeichnet, daß der Schraubenkopf (30, 31) innerhalb des Leiterabschnitts eine sphärische Form hat.
  5. Polarisator nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, daß die Schrauben (30, 31) dann, wenn die transversale Abmessung (d) des Wellenleiterabschnitts (3) in der die Symmetrieachse (32) enthaltenden Mittelebene (P) der Irisblenden kleiner als die optimale Abmessung für das gewünschte Betriebsfrequenzband ist, bei der die an den beiden Enden des Frequenzbandes erhaltenen Elliptizitätsanteile gleich sind, in dieser Mittelebene angeordnet sind.
  6. Polarisator nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, daß die Schrauben (30, 31) dann, wenn die transversale Abmessung (d) des Wellenleiterabschnitts (3) in der die Symmetrieachse enthaltenden Mittelebene der Irisblenden größer als die optimale Abmessung für das gewünschte Betriebsband ist, bei der die an den beiden Enden erhaltenen Elliptizitätsanteile gleich sind, in der Ebene (P') angeordnet sind, die die Symmetrieachse enthält und zur Mittelebene (P) senkrecht ist.
  7. Polarisator nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die einstellbaren Elemente (30, 31) in der Nähe eines der Enden des Wellenleiterabschnitts (3) angeordnet sind.
EP19960401830 1995-09-01 1996-08-27 Iris-Polarisator für Antennenprimärstrahler Expired - Lifetime EP0762529B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9510299 1995-09-01
FR9510299A FR2738400B1 (fr) 1995-09-01 1995-09-01 Polariseur a iris pour source primaire d'antenne

Publications (2)

Publication Number Publication Date
EP0762529A1 EP0762529A1 (de) 1997-03-12
EP0762529B1 true EP0762529B1 (de) 2001-03-14

Family

ID=9482209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960401830 Expired - Lifetime EP0762529B1 (de) 1995-09-01 1996-08-27 Iris-Polarisator für Antennenprimärstrahler

Country Status (3)

Country Link
EP (1) EP0762529B1 (de)
DE (1) DE69612052T2 (de)
FR (1) FR2738400B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1319925B1 (it) * 2000-02-29 2003-11-12 Cselt Centro Studi Lab Telecom Polarizzazione in guida d'onda.
MX2019002522A (es) * 2016-09-06 2019-07-04 Parker Hannifin Corp Montaje de polarizador.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58114502A (ja) * 1981-12-28 1983-07-07 Nippon Hoso Kyokai <Nhk> 偏波だ円制御装置
US4672334A (en) * 1984-09-27 1987-06-09 Andrew Corporation Dual-band circular polarizer
SU1596407A1 (ru) * 1988-04-25 1990-09-30 Предприятие П/Я А-3141 Волноводный пол ризатор

Also Published As

Publication number Publication date
DE69612052D1 (de) 2001-04-19
DE69612052T2 (de) 2001-09-20
EP0762529A1 (de) 1997-03-12
FR2738400A1 (fr) 1997-03-07
FR2738400B1 (fr) 1997-10-03

Similar Documents

Publication Publication Date Title
EP0047203B1 (de) Über eine grosse Bandbreite abstimmbares Mikrowellenfilter mit einem dielektrischen Resonator
EP0114140B1 (de) Abstimmbarer Mikrowellenfilter mit dielektrischen Resonatoren im TM010 Modus
EP0014115B1 (de) Abstimmbarer mit magnetostatischen Wellen arbeitender Hochfrequenzoszillator
FR2669776A1 (fr) Antenne hyperfrequence a fente a structure de faible epaisseur.
EP2195877B1 (de) Omt-breitband- und multiband-/sende- und empfangs-/kopplungs- und trennvorrichtung für hochfrequenz-telekommunikationsantennen
EP0315141A1 (de) Anregungsvorrichtung einer zirkularpolarisierten Welle mit einer Flachantenne in einem Hohlleiter
FR2704358A1 (fr) Duplexeur de polarissation à guide d&#39;ondes.
FR2604305A1 (fr) Filtre composite a large bande de type plan e
FR2994028A1 (fr) Filtre passe bande accordable en frequence pour onde hyperfrequence
EP0467818B1 (de) Übergangsstück zwischen elektromagnetischen Hohlleitern, insbesondere zwischen einem Rundhohlleiter und einem Koaxialhohlleiter
EP0762529B1 (de) Iris-Polarisator für Antennenprimärstrahler
FR2582449A1 (fr) Dispositif diplexeur de polarisations a large bande et antenne associee a un radar ou a un dispositif de contre-mesure comportant un tel dispositif
EP0060174B1 (de) Bandpassfilter mit dielektrischen Resonatoren
CA1074878A (fr) Transition hyperfrequence
EP0018261B1 (de) Breitbandwellenleiter mit zwei Polarisationsrichtungen
EP0550320B1 (de) Wellenleiter mit geraden strahlenden Schlitzen, angeregt durch metallische Einsätze
FR2519475A1 (fr) Dispositif selectif accordable a ondes magnetostatiques de volume
EP0022401A1 (de) Breitbandpolarisator mit niedrigem Elliptizitätsgrad und Mikrowellengerät mit einem solchen Polarisator
EP0093058B1 (de) Mikrowellen-Speisevorrichtung für rotationssymmetrischen Doppelbanderreger mit Rillen
FR2470457A1 (fr) Antenne a reseau a fentes avec distribution d&#39;amplitude dans une petite ouverture circulaire
EP0045242A1 (de) In Hohlleitertechnik ausgeführtes Bandpassfilter für Mikrowellen
FR2655199A1 (fr) Filtre eliminateur de bande pour guide d&#39;ondes hyperfrequences.
FR2546672A1 (fr) Dispositif selectif accordable a ondes magnetostatiques de volume
EP0623970A1 (de) Antenne mit zirkularem oder elliptischem Profil, feststehend oder rotierend, für einen oder mehrere multipolarisierte Wellen abgebende Mikrowellengeneratoren
EP0757403A1 (de) Eine gamma/g/2-Resonator-bildende magnetische Kopplungsvorrichtung zwischen einem Hauptleiter, einer TEM-Leitung und einem Wellenleiter

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: 19970909

17Q First examination report despatched

Effective date: 19991129

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

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

REF Corresponds to:

Ref document number: 69612052

Country of ref document: DE

Date of ref document: 20010419

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

Effective date: 20010410

ITF It: translation for a ep patent filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: THALES

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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: CD

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

Ref country code: FR

Payment date: 20040810

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: 20040825

Year of fee payment: 9

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

Ref country code: DE

Payment date: 20040902

Year of fee payment: 9

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: 20050827

Ref country code: GB

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

Effective date: 20050827

REG Reference to a national code

Ref country code: FR

Ref legal event code: CL

Ref country code: FR

Ref legal event code: AU

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: 20060301

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

Effective date: 20050827

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: 20060428

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060428