EP0670609A1 - Antenne multifaisceau pour réception/émission simultanée de signaux de même fréquence de/à une ou plusieurs directions coplanaires - Google Patents

Antenne multifaisceau pour réception/émission simultanée de signaux de même fréquence de/à une ou plusieurs directions coplanaires Download PDF

Info

Publication number: EP0670609A1
Authority: EP; European Patent Office
Prior art keywords: antenna; directions; same frequency; receiving; reflector
Prior art date: 1994-03-03
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

EP95830068A

Other languages

German (de)

English (en)

Other versions

EP0670609B1 (fr

Inventor

Maurizio Lori

Pasquale Russo

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.)

Airbus Italia SpA

Original Assignee

Space Engineering 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.)

1994-03-03

Filing date

1995-03-01

Publication date

1995-09-06

1995-03-01 Application filed by Space Engineering SpA filed Critical Space Engineering SpA

1995-09-06 Publication of EP0670609A1 publication Critical patent/EP0670609A1/fr

1998-12-30 Application granted granted Critical

1998-12-30 Publication of EP0670609B1 publication Critical patent/EP0670609B1/fr

2015-03-01 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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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
- H01Q19/10—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
- H01Q19/17—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 comprising two or more radiating elements

Definitions

This invention concerns a multibeam antenna capable of receiving/transmitting same frequency signals from/to one or more coplanar directions simultaneously.
the invention consists of one or more radiating elements and of a parabolic reflector with square aperture.
Essential detail for the achievement of optimal performance is that one of the four vertices of the square, which circumscribes the reflector, must be placed close to the vertex of the paraboloid. A more detailed explanation will be provided later on herein.
the Inventors intend to meet the need of obtaining an antenna capable of simultaneously receiving/transmitting signals at the same frequency, from/to several coplanar directions, while ensuring at the same time a sufficient degree of isolation between signals, in the case that these directions are aligned and in proximity one with the other.
This invention finds its application in the technical field of space and non-space antenna electronics. It may be conveniently applied especially in the field of space antennas, most of all for TV signals.
the invention subject of this application for patent refers to an antenna studied for Direct Broadcasting System (DBS) type applications, namely a direct TV signal reception system via satellite.
DBS Direct Broadcasting System
Fig. 1 shows one of the aperture shapes, of reflector (1), which can be assigned to the antenna in question, in which (3) indicates the rim, (4) indicates one of the four vertices close to which passes the focal axis (5).
the focal axis is visible in Fig. 2, while in Fig. 1 it coincides with point (2).
the radiating elements (2) and the optimal operating directions are coplanar and can be placed on two orthogonal planes.
the antenna subject of the invention submitted herein, has therefore been studied, as mentioned before, for DBS type applications and in particular it meets the requirements the parameters of which are illustratively indicated by, but not limited to, the following:
the antenna receives the TV signal coming from continguous satellites on the stationary orbit.
the angular distance, which today is expected for these satellites, is about 3.3°. The Inventors have taken this requisite into account in their invention.
the electro-magnetic energy coming from each satellite is reflected by the reflector's surface and directed towards the corresponding radiating element (2).

Landscapes

Aerials With Secondary Devices (AREA)
Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Burglar Alarm Systems (AREA)
Radar Systems Or Details Thereof (AREA)
Variable-Direction Aerials And Aerial Arrays (AREA)

EP95830068A 1994-03-03 1995-03-01 Antenne multifaisceau pour réception/émission simultanée de signaux de même fréquence de/à une ou plusieurs directions coplanaires Expired - Lifetime EP0670609B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
ITRM940117A IT1271871B (it)	1994-03-03	1994-03-03	Antenna multifascio in grado di ricevere/trasmettere segnali alla stessa frequenza, da/verso piu' direzioni coplanari, simultaneamente.
ITRM940117		1994-03-03

Publications (2)

Publication Number	Publication Date
EP0670609A1 true EP0670609A1 (fr)	1995-09-06
EP0670609B1 EP0670609B1 (fr)	1998-12-30

Family

ID=11402316

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP95830068A Expired - Lifetime EP0670609B1 (fr)	1994-03-03	1995-03-01	Antenne multifaisceau pour réception/émission simultanée de signaux de même fréquence de/à une ou plusieurs directions coplanaires

Country Status (4)

Country	Link
EP (1)	EP0670609B1 (fr)
DE (1)	DE69506928T2 (fr)
ES (1)	ES2128026T3 (fr)
IT (1)	IT1271871B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1289062A1 (fr) *	2001-08-02	2003-03-05	Alcatel	Antenne à multifaisceaux

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3605195A1 (de) *	1986-02-19	1987-08-20	Licentia Gmbh	Antenne mit parabolreflektor
EP0275062A2 (fr) *	1987-01-12	1988-07-20	Nec Corporation	Antenne à faisceaux multiples
WO1992007394A1 (fr) *	1990-10-18	1992-04-30	D-Mac International Limited	Antenne pour satellites
FR2674377A1 (fr) *	1991-03-22	1992-09-25	Alcatel Espace	Antenne radioelectrique a reflecteur multifocales.

1994
- 1994-03-03 IT ITRM940117A patent/IT1271871B/it active IP Right Grant
1995
- 1995-03-01 DE DE69506928T patent/DE69506928T2/de not_active Expired - Fee Related
- 1995-03-01 ES ES95830068T patent/ES2128026T3/es not_active Expired - Lifetime
- 1995-03-01 EP EP95830068A patent/EP0670609B1/fr not_active Expired - Lifetime

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3605195A1 (de) *	1986-02-19	1987-08-20	Licentia Gmbh	Antenne mit parabolreflektor
EP0275062A2 (fr) *	1987-01-12	1988-07-20	Nec Corporation	Antenne à faisceaux multiples
WO1992007394A1 (fr) *	1990-10-18	1992-04-30	D-Mac International Limited	Antenne pour satellites
FR2674377A1 (fr) *	1991-03-22	1992-09-25	Alcatel Espace	Antenne radioelectrique a reflecteur multifocales.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1289062A1 (fr) *	2001-08-02	2003-03-05	Alcatel	Antenne à multifaisceaux
US6741218B2 (en)	2001-08-02	2004-05-25	Alcatel	Multibeam antenna system

Also Published As

Publication number	Publication date
ITRM940117A0 (it)	1994-03-03
IT1271871B (it)	1997-06-09
EP0670609B1 (fr)	1998-12-30
DE69506928T2 (de)	1999-08-12
ITRM940117A1 (it)	1995-09-03
DE69506928D1 (de)	1999-02-11
ES2128026T3 (es)	1999-05-01

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1995-07-21	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
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1995-09-27	RIN1	Information on inventor provided before grant (corrected)	Inventor name: RUSSO, PASQUALE Inventor name: LORI, MAURIZIO
1996-02-28	17P	Request for examination filed	Effective date: 19951207
1997-03-26	17Q	First examination report despatched	Effective date: 19970210
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