WO1986000760A1 - Antenne multidirectionnelle pouvant fournir differentes positions de faisceaux en fonction du secteur angulaire considere - Google Patents

Antenne multidirectionnelle pouvant fournir differentes positions de faisceaux en fonction du secteur angulaire considere Download PDF

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Publication number
WO1986000760A1
WO1986000760A1 PCT/IT1985/000015 IT8500015W WO8600760A1 WO 1986000760 A1 WO1986000760 A1 WO 1986000760A1 IT 8500015 W IT8500015 W IT 8500015W WO 8600760 A1 WO8600760 A1 WO 8600760A1
Authority
WO
WIPO (PCT)
Prior art keywords
multibeam antenna
sub
provide different
antenna
different beam
Prior art date
Application number
PCT/IT1985/000015
Other languages
English (en)
Inventor
Rosario Scarpetta
Pasquale Russo
Original Assignee
Selenia, Industrie Elettroniche Associate
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, Industrie Elettroniche Associate filed Critical Selenia, Industrie Elettroniche Associate
Publication of WO1986000760A1 publication Critical patent/WO1986000760A1/fr

Links

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
    • H01Q3/24—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 orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • 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

Definitions

  • This invention concerns a multibeam antenna which has a high switching capability with high RF power levels.
  • the invention may find, application in the field of electronic defence systems fay tackling single or multiple threats arriving from different directions.
  • the antenna can provide pseudo adaptability to the radar cross section, as it is made up of three sub arrays, each of which includes eight elementary equispaced radiators which assure angular coverage of the azimuth emispace from 0° to 180°, fed by a single beamshaping network which provides the correct field amplitude and phase distribution.
  • the emispace is therefore divided into-three angular sectors, each of which a sub array is associated. Switching between these angular sectors and within each sector is electronic.
  • Each sub array shapes three beams which take different angular positions on the azimuth plane through the same feed network. The selection of these beams is electronic upon designation by the system which assesses relevant direction of arrival.
  • One of the previous solutions was to utilize arrays fed by Rothman lenses or by Butler matrixes.
  • An other solution was provided by a series of directional antennas, one for each beam to shape, fed by a n way switch (as many ways as the number of beams) or by transmitters.
  • the antenna which is the subject of this invention, consists of three sub arrays (5), (6), (7) which suitably spaced, can assure angular coverage in the 0° : 180° azimuth emispace. ( In a specular manner, three more sub arrays, fed by a separate transmitter, can assure angle coverage in the other 180° : 360° azimuth emispace).
  • the three sub arrays are fed by a single beamforming network which provides for the correct field amplitude & phase distribution to each subarray.
  • the emispace is thus divided into three angle sectors, to each one of which a sub array is associated. Switching between these angular sectors is performed electronically and within each sector; the relevant sub array forms three beams which take different angle directions on the azimuth plane through the same feed network.
  • the beam switching and farming network consists of solid state components to obtain the high switching speeds (100-150 nsec) which are required to satisfy the tasks set on the system.
  • the gain of each beam, required to established the necessary effective radiated power is achieved by providing the array with a directivity also in the vertical plane. This can be achieved by using as an element of the array a sectorial horn radiator, over the aperture of which a phase correcting dielectric lens is placed, which enhances radiation efficiency.
  • a most interesting characteristic of this indicating system is that of directing the beam to the desired direction in negligible times. This is achieved through:
  • the transmitting antenna is made up of two specular subassemblies each covering a 180° sector. It may be installed, in its preferred configuration, on board a ship ( Figure 1).
  • Figure 1 Schematic representation of the system fitted on board a ship.
  • Figure 5 Delay line phase shifter, indicated as a whole with numbers (2) (3) (4) in Figure 3.
  • Figure 6 Piirt circuit, where d stands for the desired direction, 3a, 3c and 4 are the signals which enable each relevant block 3a, 3c and 4. (Figure 2) to deliver RF power in the desired directi ⁇ n.
  • Figure 7 Detail of one of the sub arrays where X, Y, Z are the reference system;
  • (5a) is the radiating element
  • (9) is the dielectric lens for field phase correction over the varying element
  • the antenna systems operation will be described: the input RF signal (1) is split by the power divider (2) into eight parts, which are sent to the delay line phase shifter (3).
  • the delay live phase shifter (3) provides the correct phase illumination to sub array (5) or (6) or (7) to radiate the RF signal in the desired direction.
  • Such phase shifter consists of delay lines (36) either coaxial or triplate to assure stability in the radiation direction over the whole range of frequencies of operation.
  • the switching network (selector) (4) which follows the phase shifter (3) switches the predetermined distribution onto one of the three sub arrays (5), (6), (7) which are geometrically set to achieve the coverage required (0° : 180°).
  • the commands to the delay line phase shifter (3) and to the switching network (sub array selector) (4) are provided in parallel to the pilot circuit (8) as a function of the desired position of the beam.
  • This pilot circuit can select the output signals, corresponding to the input signal, required to drive the beam selectors 3a & 3c and the sub array selector (4) and then to deliver RF power in the desired direction.
  • the insertion loss of the phase shifting splitting & switching network is ⁇ dB so that the antenna gain, inclusive of losses, is 18 dB.
  • the centre subarray ( Figure 3) covers the angular sector from 67.5° to 112.5°, while the two sub arrays (5), (7), cover each0°:67.5° and 112.5°: 180°. This gain distribution may be exploited to make the antenna system pseudoadaptive to ship R.C.S. for a more effective electronic defence (ECM) of the same.
  • ECM electronic defence
  • This adaptation provides the antenna system also with a pseudoadapting capability to the ship radar cross section, as in the angular sector where this is larger, there is a larger array gain and therefore higher effective radiated power, known in leterature as ERP.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

Antenne multidirectionnelle possédant une grande capacité de commutation avec des niveaux de puissance HF élevés, se composant de trois sous-rangées (5, 6, 7) lesquelles, espacées de manière appropriée, assurent une couverture angulaire dans l'hémiespace azimutal entre 0o et 180o. Un réseau formant un faisceau unique (2, 3) confère à chaque sous-rangée l'amplitude de champ et la distribution de phase correctes. La commutation est effectuée électroniquement.
PCT/IT1985/000015 1984-07-09 1985-07-03 Antenne multidirectionnelle pouvant fournir differentes positions de faisceaux en fonction du secteur angulaire considere WO1986000760A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT48534A/84 1984-07-09
IT48534/84A IT1179394B (it) 1984-07-09 1984-07-09 Antenna multifascio in grado di realizzare posizioni di fascio diverse in funzione del settore angolare di interesse

Publications (1)

Publication Number Publication Date
WO1986000760A1 true WO1986000760A1 (fr) 1986-01-30

Family

ID=11267149

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1985/000015 WO1986000760A1 (fr) 1984-07-09 1985-07-03 Antenne multidirectionnelle pouvant fournir differentes positions de faisceaux en fonction du secteur angulaire considere

Country Status (3)

Country Link
EP (1) EP0191031A1 (fr)
IT (1) IT1179394B (fr)
WO (1) WO1986000760A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988006808A2 (fr) * 1987-02-27 1988-09-07 Hughes Aircraft Company Lentille de traversee tridimensionnelle a couverture hemispherique
FR2621397A1 (fr) * 1987-09-21 1989-04-07 Nec Corp Equipement de guidage pour systeme d'atterrissage en hyperfrequences
FR2646563A1 (fr) * 1989-04-24 1990-11-02 Mitsubishi Electric Corp Dispositif d'antennes de reseau de type a balayage electronique
WO1991001620A2 (fr) * 1989-06-02 1991-02-21 Scientific Atlanta, Inc. Systeme d'antenne a elements multiples et procede de traitement de signaux en reseau
WO1991009433A1 (fr) * 1989-12-18 1991-06-27 Allied-Signal Inc. Reseau d'antennes en phase circulaire a large bande
EP0698972A1 (fr) * 1994-08-23 1996-02-28 Loral Qualcomm Satellite Services, Inc. Antenne pour liaisons de communication multivoies par satellite
GB2314687A (en) * 1986-08-05 1998-01-07 Thomson Csf Radant Microwave antenna with synthesized radiation diagram
EP1098455A2 (fr) * 1999-11-03 2001-05-09 CALY Corporation Routeur avec de la communation spatiale pour des paquets de données transmis sans fil
GB2356096A (en) * 1991-03-12 2001-05-09 Siemens Plessey Electronic Radar antenna system
DE102014106060A1 (de) * 2014-04-30 2015-11-19 Karlsruher Institut für Technologie Antennenanordnung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816830A (en) * 1970-11-27 1974-06-11 Hazeltine Corp Cylindrical array antenna
US4124852A (en) * 1977-01-24 1978-11-07 Raytheon Company Phased power switching system for scanning antenna array
GB1553916A (en) * 1975-06-09 1979-10-10 Commw Scient Ind Res Org Modulation of scanning radio beams

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816830A (en) * 1970-11-27 1974-06-11 Hazeltine Corp Cylindrical array antenna
GB1553916A (en) * 1975-06-09 1979-10-10 Commw Scient Ind Res Org Modulation of scanning radio beams
US4124852A (en) * 1977-01-24 1978-11-07 Raytheon Company Phased power switching system for scanning antenna array

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Conference on Aerospace Antennas, 8-10 June 1971, IEEE, London R.H.J. CARY: "An Airborne Electronically Scanned X Band Narrow Beam Circular Antenna Array", pages 19-24; see figure 1; paragraph 2 *
Conference Proceedings; 12th european Microwave Conference; 13-17 September 1982, Helsinki, Finland G. SEEHAUSEN: "Feed System for Spherical Antenna Arrays with Amplitude Control", pages 661-666, see the whole document *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314687A (en) * 1986-08-05 1998-01-07 Thomson Csf Radant Microwave antenna with synthesized radiation diagram
GB2314687B (en) * 1986-08-05 1998-05-13 Thomson Csf Radant Microwave antenna with synthesized radiation pattern
WO1988006808A3 (fr) * 1987-02-27 1988-09-22 Hughes Aircraft Co Lentille de traversee tridimensionnelle a couverture hemispherique
WO1988006808A2 (fr) * 1987-02-27 1988-09-07 Hughes Aircraft Company Lentille de traversee tridimensionnelle a couverture hemispherique
FR2621397A1 (fr) * 1987-09-21 1989-04-07 Nec Corp Equipement de guidage pour systeme d'atterrissage en hyperfrequences
FR2646563A1 (fr) * 1989-04-24 1990-11-02 Mitsubishi Electric Corp Dispositif d'antennes de reseau de type a balayage electronique
WO1991001620A2 (fr) * 1989-06-02 1991-02-21 Scientific Atlanta, Inc. Systeme d'antenne a elements multiples et procede de traitement de signaux en reseau
WO1991001620A3 (fr) * 1989-06-02 1991-05-16 Scientific Atlanta Systeme d'antenne a elements multiples et procede de traitement de signaux en reseau
WO1991009433A1 (fr) * 1989-12-18 1991-06-27 Allied-Signal Inc. Reseau d'antennes en phase circulaire a large bande
GB2356096A (en) * 1991-03-12 2001-05-09 Siemens Plessey Electronic Radar antenna system
US6531980B1 (en) 1991-03-12 2003-03-11 Airsys Atm Limited Radar antenna system
GB2356096B (en) * 1991-03-12 2001-08-15 Siemens Plessey Electronic Method of operating a radar antenna system
US5552798A (en) * 1994-08-23 1996-09-03 Globalstar L.P. Antenna for multipath satellite communication links
AU688901B2 (en) * 1994-08-23 1998-03-19 Loral Qualcomm Satellite Services, Inc. Antenna for multipath satellite communication links
EP0698972A1 (fr) * 1994-08-23 1996-02-28 Loral Qualcomm Satellite Services, Inc. Antenne pour liaisons de communication multivoies par satellite
EP1098455A2 (fr) * 1999-11-03 2001-05-09 CALY Corporation Routeur avec de la communation spatiale pour des paquets de données transmis sans fil
EP1098455A3 (fr) * 1999-11-03 2003-08-06 Radiant Networks Plc Routeur avec de la communation spatiale pour des paquets de données transmis sans fil
DE102014106060A1 (de) * 2014-04-30 2015-11-19 Karlsruher Institut für Technologie Antennenanordnung

Also Published As

Publication number Publication date
IT1179394B (it) 1987-09-16
IT8448534A0 (it) 1984-07-09
EP0191031A1 (fr) 1986-08-20

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