EP0140199A2 - Dispositif pour compenser les composantes de polarisation croisée dans une antenne à réflecteur courbe et source primaire décentrée - Google Patents

Dispositif pour compenser les composantes de polarisation croisée dans une antenne à réflecteur courbe et source primaire décentrée Download PDF

Info

Publication number
EP0140199A2
EP0140199A2 EP84111834A EP84111834A EP0140199A2 EP 0140199 A2 EP0140199 A2 EP 0140199A2 EP 84111834 A EP84111834 A EP 84111834A EP 84111834 A EP84111834 A EP 84111834A EP 0140199 A2 EP0140199 A2 EP 0140199A2
Authority
EP
European Patent Office
Prior art keywords
correction signal
wave
coupler
waveguide
waveguide feed
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
EP84111834A
Other languages
German (de)
English (en)
Other versions
EP0140199A3 (en
EP0140199B1 (fr
Inventor
Uwe Dipl.-Ing. Leupelt
Anton Dipl.-Ing. Giefing
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT84111834T priority Critical patent/ATE55848T1/de
Publication of EP0140199A2 publication Critical patent/EP0140199A2/fr
Publication of EP0140199A3 publication Critical patent/EP0140199A3/de
Application granted granted Critical
Publication of EP0140199B1 publication Critical patent/EP0140199B1/fr
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
    • 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
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • 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
    • H01Q19/10—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 using reflecting surfaces
    • H01Q19/12—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 using reflecting surfaces wherein the surfaces are concave
    • H01Q19/13—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 using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
    • H01Q19/132—Horn reflector antennas; Off-set feeding

Definitions

  • the invention relates to a device for compensating for disturbing cross polarization components caused by the deflection on a curved reflector in an antenna provided for linear polarization, on the curved reflector of which is radiated laterally by a primary radiator designed as a horn or waveguide radiator, in whose waveguide feed waves of one are excited in comparison to the fundamental wave of a higher wave type, which have the same amplitudes in opposite phases as the waves of the wave type which would cause the same disturbing cross-polarization components as the curved reflector actually causes.
  • a combination of a curved reflector and a side-mounted (off-set) horn is often used.
  • a reflector is usually a section of a surface of revolution that is generated by a conic curve.
  • a focal point of the reflector usually coincides with the phase center of the horn.
  • Such arrangements are used either as separate antennas for directional radio, for example in the form of horn parabolic antennas and shell antennas, or also for feeding large reflector antennas in satellite radio, for example as horn parabolic or with a beam waveguide 1 .
  • Typical of the radiation behavior of these side-fed reflectors in linear polarization is a relatively high proportion of cross polarization in the diagram plane of the far field diagram that is assigned to the transverse plane perpendicular to the symmetry plane of the reflector.
  • Illuminated rotationally symmetrical parabolic reflector with a linearly polarized primary radiator which: generates a cross-polarization-free and rotationally symmetrical field (Huygens source)
  • the aperture field created after the reflection at the reflector is polarized in parallel and has no cross-polarized components. If the emitter axis is inclined against the reflector axis when feeding from the side, the aperture field is distorted in such a way that cross-polarized field components now occur.
  • the far field distribution belonging to such an aperture field shows a cross-polarized diagram with a zero in the axial direction or in the plane of symmetry and with relatively high maxima of the cross-polarization (typically about -18 dB) in the orthogonal plane.
  • the configuration of the undesired cross-polarized components in the cross-sectional plane of the free field after the reflector can also be described by a spectrum of higher wave types, which are excited by the reflector in addition to the existing basic wave type (analogy to the excitation of higher wave types in waveguides due to impurities). If such a distorted field, which arose from a wave that was originally free of cross polarization by deflection at the reflector, onto the aperture of one at the location of the Focal point arranged waveguide hits, so higher wave types can be excited in the waveguide. They can spread out in the waveguide until the cross section becomes too small. From then on, these wave types are reflected. However, the cross section cannot often be made so small, since modes with limit frequencies similar to those of the interference modes are used, for example, for direction finding purposes.
  • the principle of compensating the frequency and polarization-dependent cross-polarization components in a laterally fed reflector antenna is known and consists in the excitation of a corresponding antiphase wave type of the same amplitude by means of measures in the feed waveguide or in the primary radiator itself.
  • the field generated by the primary radiator becomes that of the Deflection reflector optimally adapted in the sense of compensation.
  • the prerequisite here is that the primary radiator used already delivers correspondingly low cross-polarization contributions.
  • the object of the invention is to achieve broadband compensation of the frequency and polarization-dependent cross-polarization components in a laterally fed reflector antenna with relatively simple means.
  • this object is achieved in that in the waveguide feed of the primary radiator, a mode coupler constructed in the manner of a DF shaft coupler is installed, which has an external signal input to which a correction signal is applied, which excites the compensating wave of the higher wave type in the waveguide feed that the correction signal applied to the external signal input of the mode coupler is taken from the output of an external correction signal path, in the course of which a broadband effect, ie Frequency-matched passive phase and amplitude adjusters are arranged, which are dimensioned such that the necessary correction signal characteristic is set over the desired frequency band, and that the correction signal path is connected on its input side via a coupler to the part of the waveguide supply that only guides the fundamental wave in such a way that a Part of the fundamental wave signal is coupled into the correction signal path.
  • a mode coupler constructed in the manner of a DF shaft coupler is installed, which has an external signal input to which a correction signal is applied, which excites the compensating wave of the higher wave type in the waveguide feed that the
  • a special mode coupler which has an external signal input is thus used to excite the compensating higher wave in the feed waveguide.
  • this allows the construction of an external correction tursignalweg, in the course of which broadband effective, ie frequency-matched passive phase and amplitude setting elements are installed.
  • broadband effective, ie frequency-matched passive phase and amplitude setting elements are installed.
  • a predetermined phase and amplitude characteristic is simulated over a wide frequency range, it only having to be set or adjusted once.
  • This signal path is coupled to the fundamental wave signal via the coupler.
  • the method can be used in the round as well as in the rectangular / square waveguide cross-section, with a separate compensation circuit having to be set up for each polarization direction.
  • the correction signal is set by means of the correction network in such a way that, in addition to the cross-polarization component generated by the reflector in each case, dispersions of the phase positions in the waveguide feed and in the free space and also the. Properties of the mode coupler are taken into account.
  • the antenna consists of a curved reflector 9 onto which a horn radiator 8 arranged with its feed center in the reflector focal point radiates laterally.
  • the horn 8 is fed via a feed waveguide 7.
  • a signal coupler 3 is used to convert part 1, which only carries the fundamental wave a certain proportion of the incoming fundamental wave signal is derived from the feed waveguide and fed to a correction network 4 via a line 2.
  • the circuit contained in the network 4 consists of various damping circuits 11 and phase elements 10 which serve to adjust the amplitude and are dimensioned such that they set the necessary signal characteristic over the desired frequency band.
  • the correction signal taken from the network 4 is then input to an external input 5 of a mode coupler 6 and is coupled there again as a higher wave type into the feed waveguide 7 and emitted together with the fundamental wave from the horn antenna 8 to the reflector 9.
  • the additional signal supplied to the outer input 5 of the mode coupler 6 is of such a type that it compensates for the cross polarization component generated by the reflector 9, ie the correction network 4 must also, for example, dispersions of the phases in the waveguide 7, in free space (near field) and properties of the mode coupler 6 consider. Examples of corresponding combinations of waveguide shaft types that can be generated in different emitters for compensation are listed in the following table.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Waveguide Aerials (AREA)
EP84111834A 1983-10-06 1984-10-03 Dispositif pour compenser les composantes de polarisation croisée dans une antenne à réflecteur courbe et source primaire décentrée Expired - Lifetime EP0140199B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111834T ATE55848T1 (de) 1983-10-06 1984-10-03 Einrichtung zur kompensation von kreuzpolarisationskomponenten bei einer antenne mit einem gekruemmten reflektor und einem seitlich einstrahlenden primaerstrahler.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833336418 DE3336418A1 (de) 1983-10-06 1983-10-06 Einrichtung zur kompensation von kreuzpolarisationskomponenten bei einer antenne mit einem gekruemmten reflektor und einem seitlich einstrahlenden primaerstrahler
DE3336418 1983-10-06

Publications (3)

Publication Number Publication Date
EP0140199A2 true EP0140199A2 (fr) 1985-05-08
EP0140199A3 EP0140199A3 (en) 1986-07-23
EP0140199B1 EP0140199B1 (fr) 1990-08-22

Family

ID=6211190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111834A Expired - Lifetime EP0140199B1 (fr) 1983-10-06 1984-10-03 Dispositif pour compenser les composantes de polarisation croisée dans une antenne à réflecteur courbe et source primaire décentrée

Country Status (3)

Country Link
EP (1) EP0140199B1 (fr)
AT (1) ATE55848T1 (fr)
DE (1) DE3336418A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1244176A1 (fr) * 2001-03-22 2002-09-25 Alcatel Antenne à reflecteur double avec deflecteur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1449265A (fr) * 1965-10-05 1966-08-12 Ass Elect Ind Perfectionnements aux dispositifs d'exploration de faisceaux hyperfréquence
DE1953083A1 (de) * 1968-10-28 1970-05-14 Hughes Aircraft Co Hornantenne
GB1525514A (en) * 1975-10-29 1978-09-20 Rudge A Primary feeds for offset parabolic reflector antennas
US4146893A (en) * 1976-11-18 1979-03-27 Kokusai Denshin Denwa Kabushiki Kaisha System for compensating for cross polarization coupling

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413642A (en) * 1966-05-05 1968-11-26 Bell Telephone Labor Inc Dual mode antenna
CA890032A (en) * 1970-08-10 1972-01-04 Wu Chuang-Jy Microwave horn-paraboloidal antenna

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1449265A (fr) * 1965-10-05 1966-08-12 Ass Elect Ind Perfectionnements aux dispositifs d'exploration de faisceaux hyperfréquence
DE1953083A1 (de) * 1968-10-28 1970-05-14 Hughes Aircraft Co Hornantenne
GB1525514A (en) * 1975-10-29 1978-09-20 Rudge A Primary feeds for offset parabolic reflector antennas
US4146893A (en) * 1976-11-18 1979-03-27 Kokusai Denshin Denwa Kabushiki Kaisha System for compensating for cross polarization coupling

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NTG-FACHBERICHTE, "ANTENNEN", Vortr{ge der NTG-Fachtagung, 8.-11. M{rz 1977, Bad Nauheim, DE, Band 57, Seiten 86-90, VDE-Verlag GmbH, Berlin, DE; G. M\RZ: "Ein neues Mehrmoden-Speisesystem zu elektrisch gesteuerten Strahlschwenkung bei parabolischen Reflektorantennen" *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1244176A1 (fr) * 2001-03-22 2002-09-25 Alcatel Antenne à reflecteur double avec deflecteur
US6759993B2 (en) 2001-03-22 2004-07-06 Alcatel Dual polarization antenna with low side lobes

Also Published As

Publication number Publication date
EP0140199A3 (en) 1986-07-23
DE3336418C2 (fr) 1987-09-24
EP0140199B1 (fr) 1990-08-22
DE3336418A1 (de) 1985-05-02
ATE55848T1 (de) 1990-09-15

Similar Documents

Publication Publication Date Title
EP0061576A1 (fr) Dispositif de transmission d'informations à micro-ondes avec réception combinée de diversité multimode
DE3129425A1 (de) Mikrowellenantenne fuer zirkularpolarisation
EP0041077A2 (fr) Dispositif d'alimentation d'antenne pour une antenne de poursuite
DE10195823B3 (de) Antennenelement, Transceiver und Verfahren zum Betreiben eines Transceivers
EP0140199B1 (fr) Dispositif pour compenser les composantes de polarisation croisée dans une antenne à réflecteur courbe et source primaire décentrée
DE2925063C2 (de) Radarantenne mit integrierter IFF-Antenne
DE3336452C2 (fr)
EP0284883B1 (fr) Antenne directive micro-ondes à deux réflecteurs
EP0422431B1 (fr) Dispositif à diversité angulaire
DE2722373A1 (de) Antennensystem
DE2752680A1 (de) Richtantenne fuer sehr kurze elektromagnetische wellen
DE2828807C2 (de) Radar-Cassegrain-Antenne mit einem Primärstrahler, der mit zwei senkrecht zueinander polarisierten elektromagnetischen Wellen betrieben wird
EP0510588A1 (fr) Dispositif pour compenser les composantes de polarisation croisée dans une antenne à réflecteur courbe et source primaire décentrée
DE2449106C3 (de) Breitband-Hornreflektors tränier
DE2607809A1 (de) Mikrowellenantenne geringer buendelung
DE2729110C2 (de) Strahlungsgespeiste phasengesteuerte Antennenanordnung
DE940238C (de) Antennenanordnung
DE1466295C3 (de) Hornparabolantenne
DE1027745B (de) Nicht reziproke Schaltelemente
DE3203901A1 (de) Antennenerreger mit mehreren wellentypen
DE2461283A1 (de) Otationssymmetrische cassegrainantenne
DE4244145C1 (de) Anordnung zum Ankoppeln zirkular polarisierter Wellen an einen Hohlleiter
AT261005B (de) Einrichtung zur Erzeugung und/oder Empfang von aufeinander rechtwinkelig polarisierten elektromagnetischen Richtstrahlungen
DE950862C (de) Aus an einen Wellenverstaerker angeschlossenen Sende- und Empfangsantennen bestehende Anordnung
DE2348156A1 (de) Antenne fuer sehr kurze elektromagnetische wellen, insbesondere satellitenantenne

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

Designated state(s): AT BE CH FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19870114

17Q First examination report despatched

Effective date: 19890126

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 55848

Country of ref document: AT

Date of ref document: 19900915

Kind code of ref document: T

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

Ref country code: GB

Payment date: 19900913

Year of fee payment: 7

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

Ref country code: AT

Payment date: 19900928

Year of fee payment: 7

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

Ref country code: LU

Payment date: 19901005

Year of fee payment: 7

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

Ref country code: BE

Payment date: 19901019

Year of fee payment: 7

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

Ref country code: FR

Payment date: 19901022

Year of fee payment: 7

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

Ref country code: SE

Payment date: 19901024

Year of fee payment: 7

ET Fr: translation filed
ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

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

Effective date: 19901031

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

Ref country code: NL

Payment date: 19901031

Year of fee payment: 7

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910124

Year of fee payment: 7

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

Ref country code: GB

Effective date: 19911003

Ref country code: AT

Effective date: 19911003

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

Ref country code: SE

Effective date: 19911004

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

Ref country code: LI

Effective date: 19911031

Ref country code: CH

Effective date: 19911031

Ref country code: BE

Effective date: 19911031

BERE Be: lapsed

Owner name: SIEMENS A.G.

Effective date: 19911031

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

Ref country code: NL

Effective date: 19920501

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920630

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 84111834.2

Effective date: 19920510