EP0504552A1 - Netzwerk zur Strahlformung für eine Mehrmoden-Mehrstrahl-Reflektorantenne - Google Patents

Netzwerk zur Strahlformung für eine Mehrmoden-Mehrstrahl-Reflektorantenne Download PDF

Info

Publication number
EP0504552A1
EP0504552A1 EP92101034A EP92101034A EP0504552A1 EP 0504552 A1 EP0504552 A1 EP 0504552A1 EP 92101034 A EP92101034 A EP 92101034A EP 92101034 A EP92101034 A EP 92101034A EP 0504552 A1 EP0504552 A1 EP 0504552A1
Authority
EP
European Patent Office
Prior art keywords
beam forming
antenna system
network
forming networks
coefficients
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
EP92101034A
Other languages
English (en)
French (fr)
Other versions
EP0504552B1 (de
Inventor
Pasquale Capece
Stefano Badessi
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.)
Laben SpA
Original Assignee
Selenia Spazio SpA
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 Selenia Spazio SpA filed Critical Selenia Spazio SpA
Publication of EP0504552A1 publication Critical patent/EP0504552A1/de
Application granted granted Critical
Publication of EP0504552B1 publication Critical patent/EP0504552B1/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
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/40—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with phasing matrix
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/007—Antennas or antenna systems providing at least two radiating patterns using two or more primary active elements in the focal region of a focusing device

Definitions

  • the present invention relates to an antenna system having reflector and feeds fed by one or more multi-mode networks for application to multi-coverage feeds.
  • Multi beam antenna till now were based on the optimisation of the reflector (feed) beam-forming network combination which had a prefixed beamforming network - as a result of such optimisation, all system parameters, including the feed network, were defined.
  • the original network configuration separates the radiating optimisation from that of feed network design.
  • the invention is best applied to multi-beam antennae which have partially overlapping beams.
  • the overlapping sources are fed by a double cascade-type of network.
  • the invention pertains to electronic antennae for space-borne applications.
  • the problem which we propose to solve with this invention is that of the generation of overlapping beams which have a given number of common sources using the greatest number of degrees of freedom available.
  • the implemenation of multi-mode networks starting from the excitation coefficients required has taken regard for two input networks and a maximum of four outputs. This set a limit to the number of degrees of freedom availably to optimise the source excitation coefficients of the antenna system when the number of sources common to the two beams was greater than four, this limiting the achievable antenna performances.
  • the invention regards the definition of a peculiar configuration and implementation of a beam forming network which feeds N sources different than M (M less than N) from the network.
  • the network generates M orthogonal sets on n output parts previously calculated by optimising the far-field of the antenna on the required coverage, with the only constraint of orthogonality among the calculated feed excitation coefficients.
  • FIG. 1 shows a schematic diagram of the antenna system. It shows the following items:
  • Figure 2 more significant than the others, is a schematic diagram of the multi-mode network, where:
  • Figure 3 is a schematic of possible uses of the proposed antenna system.
  • This solution generates two partially overlapped coverages 8 and a global coverage 9.
  • the optical system is optimised, concluding the multi-feed reflector, together with the excitation coefficients of the latter with the only orthogonality constraint.
  • the three multi-mode networks 10 are implemented.
  • the network is synthesised in a recursive manner by generating the first mode required coefficients with the first row of couplers and phase shifters, the second with the second row and so on for the other sets of coefficients required.
  • Figure 4 is the outline schematic of another possible application of the invention. Here we can see output ports U1 - U9 and two input ports I1, I2, but these can vary in number according to the required configuration.
  • Figure 2 which shows the beam forming network, highlights outputs U from the network where M sets of N coefficients each are formed; input ports in-1, in-2 ...; the series of double cascaded couplers a1', a2', ..., a1'', a2'' ..., and phase shifters s1', s2' ....
  • the first set of N coefficients is taken into examination; a ladderrung network is implemented as shown in figure 2, i.e. the first excuiftion in amplitude and phase is effected by the first coupler 1' and phase shifter 1'.
  • the remaining power is sent to the second coupler 2' through phase shifter 2', and so on till the nth excitation coefficient of the first set is implemented.
  • the remaining M-1 sets of N coefficients are converted into M-1 sets of N-1 coefficients at the ports of the already implemented N-1 couplers, where all four parts of the couplers are utilized.
  • the first set of coefficients is implemented by grouping them two by two through the first coupler as shown in figure 4 so as to reduce the order of the multi mode network to be implemented. The process is repeated till an input for each of the M sets of coefficients required is achieved.
  • the number of sets physically possible is less or equal to the number of excitation coefficients which are characteristic of each set.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP92101034A 1991-01-23 1992-01-23 Netzwerk zur Strahlformung für eine Mehrmoden-Mehrstrahl-Reflektorantenne Expired - Lifetime EP0504552B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM910050A IT1244907B (it) 1991-01-23 1991-01-23 Configurazione e tecnica di reti multimodali formatrici di fasci per antenne multifascio a riflettore.
ITRM910050 1991-01-23

Publications (2)

Publication Number Publication Date
EP0504552A1 true EP0504552A1 (de) 1992-09-23
EP0504552B1 EP0504552B1 (de) 2001-10-24

Family

ID=11399778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101034A Expired - Lifetime EP0504552B1 (de) 1991-01-23 1992-01-23 Netzwerk zur Strahlformung für eine Mehrmoden-Mehrstrahl-Reflektorantenne

Country Status (4)

Country Link
EP (1) EP0504552B1 (de)
AT (1) ATE207657T1 (de)
DE (1) DE69232146T2 (de)
IT (1) IT1244907B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0734093A1 (de) * 1995-03-20 1996-09-25 Agence Spatiale Europeenne Vorrichtung zur Speisung einer Mehrstrahl-Gruppenantenne
EP0834955A2 (de) * 1996-10-02 1998-04-08 Hazeltine Corporation Speisenetzwerke für Antennen
EP1398849A1 (de) * 2002-09-11 2004-03-17 Metawave Communications Corporation Verfahren zur Erzeugung eines passiven Netzwerk zur Strahlformung
US6922116B1 (en) 2001-09-12 2005-07-26 Kathrein-Werke Kg Generating arbitrary passive beam forming networks

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231040A (en) * 1978-12-11 1980-10-28 Motorola, Inc. Simultaneous multiple beam antenna array matrix and method thereof
US4633259A (en) * 1984-07-10 1986-12-30 Westinghouse Electric Corp. Lossless orthogonal beam forming network
US4638317A (en) * 1984-06-19 1987-01-20 Westinghouse Electric Corp. Orthogonal beam forming network
US4710776A (en) * 1984-01-05 1987-12-01 Agence Spatiale Europeenne Power divider for multibeam antennas with shared feed elements
EP0261983A2 (de) * 1986-09-26 1988-03-30 Com Dev Ltd. Verstellbares Strahlformungsnetzwerk zur Ausstrahlung einer Gleichphasigen Leistung nach jedem Gebiet
EP0313057A2 (de) * 1987-10-23 1989-04-26 Hughes Aircraft Company Phasengesteuertes Antennensystem für zwei Moden

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231040A (en) * 1978-12-11 1980-10-28 Motorola, Inc. Simultaneous multiple beam antenna array matrix and method thereof
US4710776A (en) * 1984-01-05 1987-12-01 Agence Spatiale Europeenne Power divider for multibeam antennas with shared feed elements
US4638317A (en) * 1984-06-19 1987-01-20 Westinghouse Electric Corp. Orthogonal beam forming network
US4633259A (en) * 1984-07-10 1986-12-30 Westinghouse Electric Corp. Lossless orthogonal beam forming network
EP0261983A2 (de) * 1986-09-26 1988-03-30 Com Dev Ltd. Verstellbares Strahlformungsnetzwerk zur Ausstrahlung einer Gleichphasigen Leistung nach jedem Gebiet
EP0313057A2 (de) * 1987-10-23 1989-04-26 Hughes Aircraft Company Phasengesteuertes Antennensystem für zwei Moden

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0734093A1 (de) * 1995-03-20 1996-09-25 Agence Spatiale Europeenne Vorrichtung zur Speisung einer Mehrstrahl-Gruppenantenne
EP0834955A2 (de) * 1996-10-02 1998-04-08 Hazeltine Corporation Speisenetzwerke für Antennen
EP0834955A3 (de) * 1996-10-02 2000-04-19 Hazeltine Corporation Speisenetzwerke für Antennen
US6922116B1 (en) 2001-09-12 2005-07-26 Kathrein-Werke Kg Generating arbitrary passive beam forming networks
EP1398849A1 (de) * 2002-09-11 2004-03-17 Metawave Communications Corporation Verfahren zur Erzeugung eines passiven Netzwerk zur Strahlformung

Also Published As

Publication number Publication date
EP0504552B1 (de) 2001-10-24
ATE207657T1 (de) 2001-11-15
ITRM910050A0 (it) 1991-01-23
DE69232146D1 (de) 2001-11-29
ITRM910050A1 (it) 1992-07-24
IT1244907B (it) 1994-09-13
DE69232146T2 (de) 2002-07-11

Similar Documents

Publication Publication Date Title
US5151706A (en) Apparatus for electronically controlling the radiation pattern of an antenna having one or more beams of variable width and/or direction
EP2923412B1 (de) Strahlformungsnetzwerk für eine gruppenantenne und gruppenantenne damit
US4045800A (en) Phase steered subarray antenna
US4566013A (en) Coupled amplifier module feed networks for phased array antennas
US5959578A (en) Antenna architecture for dynamic beam-forming and beam reconfigurability with space feed
US4638317A (en) Orthogonal beam forming network
US4318104A (en) Directional arrays
AU613458B2 (en) An electronically scanned antenna
US4507662A (en) Optically coupled, array antenna
US5734349A (en) High capacity multibeam antenna with electronic scanning in transmission
US5598173A (en) Shaped-beam or scanned beams reflector or lens antenna
JPH03207104A (ja) 多重ビームアンテナ給電装置
EP0307445A1 (de) Strahlformungsnetzwerk mit mehreren stufen.
US6480154B1 (en) Method and system for digital beam forming
US6411255B2 (en) Reflector antenna comprising a plurality of panels
US5548295A (en) Multishaped beam direct radiating array antenna
EP0504552A1 (de) Netzwerk zur Strahlformung für eine Mehrmoden-Mehrstrahl-Reflektorantenne
US3839720A (en) Corporate feed system for cylindrical antenna array
JP2000174537A (ja) フェーズドアレーアンテナ
Mailloux Subarray technology for large scanning arrays
Menargues et al. Meandered waveguides for active antennas
Biosca et al. Side-lobe reduction with overlapped beam-forming network for Ku-band hybrid antenna array
EP0446610A1 (de) Vergrösserte phasengesteuerte Gruppenantenne mit digitalem Strahlformungsnetzwerk
JPH0446002B2 (de)
GB2023940A (en) Directional arrays

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): AT DE FR GB NL SE

DX Miscellaneous (deleted)
17P Request for examination filed

Effective date: 19930320

17Q First examination report despatched

Effective date: 19941205

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

Owner name: FINMECCANICA S.P.A.

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

Owner name: ALENIA SPAZIO S.P.A.

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

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): AT DE FR GB NL SE

REF Corresponds to:

Ref document number: 207657

Country of ref document: AT

Date of ref document: 20011115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69232146

Country of ref document: DE

Date of ref document: 20011129

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

ET Fr: translation filed
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: GB

Ref legal event code: 732E

NLS Nl: assignments of ep-patents

Owner name: LABEN S.P.A.

Effective date: 20050712

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: ALENIA SPAZIO S.P.A.

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

Ref country code: FR

Ref legal event code: CA

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

NLS Nl: assignments of ep-patents

Owner name: FINMECCANICA S.P.A.

Effective date: 20050920

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: AT

Payment date: 20070208

Year of fee payment: 16

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

Ref country code: GB

Payment date: 20070214

Year of fee payment: 16

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

Ref country code: NL

Payment date: 20070216

Year of fee payment: 16

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

Ref country code: SE

Payment date: 20070219

Year of fee payment: 16

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

Ref country code: DE

Payment date: 20070226

Year of fee payment: 16

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

Ref country code: FR

Payment date: 20070212

Year of fee payment: 16

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20080123

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20080801

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

Ref country code: NL

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

Effective date: 20080801

Ref country code: DE

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

Effective date: 20080801

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

Ref country code: AT

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

Effective date: 20080123

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081029

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: 20080123

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

Ref country code: SE

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

Effective date: 20080124

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: 20080131