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ITRM940117A1 - MULTI-BAND ANTENNA ABLE TO RECEIVE / TRANSMIT SIGNALS AT THE SAME FREQUENCY, FROM / TOWARDS MULTIPLE DIRECTIONS, SIMULTANEOUSLY - Google Patents

MULTI-BAND ANTENNA ABLE TO RECEIVE / TRANSMIT SIGNALS AT THE SAME FREQUENCY, FROM / TOWARDS MULTIPLE DIRECTIONS, SIMULTANEOUSLY Download PDF

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Publication number
ITRM940117A1
ITRM940117A1 IT000117A ITRM940117A ITRM940117A1 IT RM940117 A1 ITRM940117 A1 IT RM940117A1 IT 000117 A IT000117 A IT 000117A IT RM940117 A ITRM940117 A IT RM940117A IT RM940117 A1 ITRM940117 A1 IT RM940117A1
Authority
IT
Italy
Prior art keywords
same frequency
antenna
receive
transmit signals
multiple directions
Prior art date
Application number
IT000117A
Other languages
Italian (it)
Inventor
Maurizio Lori
Pasquale Russo
Original Assignee
Space Engineering S R L Ora Space Engineering S P
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 Space Engineering S R L Ora Space Engineering S P filed Critical Space Engineering S R L Ora Space Engineering S P
Priority to ITRM940117A priority Critical patent/IT1271871B/en
Publication of ITRM940117A0 publication Critical patent/ITRM940117A0/en
Priority to DE69506928T priority patent/DE69506928T2/en
Priority to ES95830068T priority patent/ES2128026T3/en
Priority to EP95830068A priority patent/EP0670609B1/en
Publication of ITRM940117A1 publication Critical patent/ITRM940117A1/en
Application granted granted Critical
Publication of IT1271871B publication Critical patent/IT1271871B/en

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10Combinations 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
    • H01Q19/12Combinations 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
    • H01Q19/17Combinations 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

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)

Description

DESCRIZIONE DESCRIPTION

a corredo di una domanda di brevetto per invenzione industriale dal titolo ANTENNA MULTIFASCIO IN GRADO DI RICEVERE/TRASMETTERE SEGNALI ALLA STESSA FREQUENZA, DA/VERSO PIÙ DIREZIONI COPLANARI, SIMULTANEAMENTE. accompanying a patent application for industrial invention entitled MULTI-BEAM ANTENNA ABLE TO RECEIVE / TRANSMIT SIGNALS AT THE SAME FREQUENCY, FROM / TO MULTIPLE COPLANAR DIRECTIONS, SIMULTANEOUSLY.

L'invenzione riguarda un'antenna multifascio in grado di ricevere/trasmettere segnali alla stessa frequenza, da/verso una o più direzioni coplanari, simultaneamente. The invention relates to a multibeam antenna capable of receiving / transmitting signals at the same frequency, from / towards one or more coplanar directions, simultaneously.

L'invenzione è composta da uno o più elementi radianti e da un riflettore parabolico avente apertura quadrata. Particolarità essenziale per il raggiungimento delle prestazioni ottimali è che uno dei quattro spigoli del quadrato, che delimita il riflettore , deve essere posto nei pressi del vertice del paraboloide. Nel seguito si entrerà nel merito dettagliatamente. The invention is composed of one or more radiating elements and a parabolic reflector having a square opening. An essential feature for achieving optimal performance is that one of the four corners of the square, which delimits the reflector, must be placed near the vertex of the paraboloid. In the following we will enter into the merits in detail.

Con la presente invenzione, dunque, gli Inventori si propongono di rispondere alle esigenze di ottenere un'antenna capace di ricevere/trasmettere segnali simultaneamente alla stessa frequenza, da/verso più direzioni coplanari, garantendo, nel contempo, un sufficiente grado di isolamento tra di essi (segnali), nel caso in cui le direzioni precedenti siano allineate tra di loro e vicine. With the present invention, therefore, the inventors propose to respond to the needs of obtaining an antenna capable of receiving / transmitting signals simultaneously at the same frequency, from / towards multiple coplanar directions, while ensuring, at the same time, a sufficient degree of isolation between they (signals), in case the previous directions are aligned with each other and close together.

Si è giunti con successo ai risultati, che la Società Titolare dell'invenzione intende coprire con brevetto, nel tentativo di rispondere alle future esigenze di ricezione di segnali televisivi via satellite. A causa del crescente affollamento dell'orbita geostazionaria, ci si troverà presto a dover ricevere segnali da un satellite cercando, nel contempo, di attenuare il più possibile i segnali provenienti dai satelliti adiacenti. L'attenuazione di questi ultimi segnali è necessaria poiché, dato ohe essi occupano la stessa banda di frequenza di quelli che si vogliono ricevere, rappresentano dei disturbi. The results have been successfully obtained, which the Company that owns the invention intends to cover with a patent, in an attempt to meet the future needs of receiving television signals via satellite. Due to the increasing crowding of the geostationary orbit, one will soon have to receive signals from a satellite while trying to attenuate as much as possible the signals from adjacent satellites. Attenuation of these latter signals is necessary since, given that they occupy the same frequency band as those to be received, they represent disturbances.

Nella tecnica precedente, lo stesso problema veniva risolto utilizzando riflettori sovradimensionati. Con questo sistema, spesso, si rispondeva solo parzialmente alle esigenze suddette, in quanto si garantiva non simultaneamente la ricezione dei suddetti segnali, tramite un meccanismo di ripuntamento. Ciò comportava inconvenienti di ordine tecnico oltre, naturalmente, a costi maggiori. In the prior art, the same problem was solved by using oversized reflectors. With this system, the above requirements were often only partially met, as the reception of the aforementioned signals was not simultaneously guaranteed, by means of a re-targeting mechanism. This involved technical drawbacks as well as, of course, higher costs.

L'invenzione si colloca nel campo tecnico scientifico dell'elettronica delle antenne spaziali e non. Essa trova convenienti applicazioni soprattutto nel campo delle antenne spaziali, da utilizzare specialmente per segnali TV. L'invenzione, oggetto della presente domanda di brevetto, si riferisce ad un'antenna studiata per applicazioni di tipo "DBS". L'acronìmo, nello specifico linguaggio, significa "Direct Broadcasting System", ed indica un sistema di ricezione diretta di segnali televisivi via satellite, The invention is located in the scientific technical field of the electronics of space and non-space antennas. It finds convenient applications especially in the field of space antennas, to be used especially for TV signals. The invention, object of the present patent application, refers to an antenna designed for "DBS" type applications. The acronyms, in the specific language, means "Direct Broadcasting System", and indicates a system of direct reception of television signals via satellite,

Il trovato presentato garantisce, nel caso si adotti la configurazione "singolo riflettore", il raggiungimento di prestazioni ottimali nei termini di: The presented invention guarantees, if the "single reflector" configuration is adopted, the achievement of optimal performance in terms of:

massimo isolamento tra le direzioni di funzionamento a parità di guadagno d'antenna; maximum isolation between the operating directions with the same antenna gain;

minimo ingombro della superficie riflettente, infatti, la configurazione quadrata consente di ridurre i problemi di confezionamento ("packaging") e quindi di trasporto dell'insieme antenna. minimum encumbrance of the reflecting surface, in fact, the square configuration allows to reduce the problems of packaging ("packaging") and therefore of transport of the antenna assembly.

L'invenzione viene ora descritta a scopo illustrativo e non limitativo, secondo una versione attualmente preferita dagli inventori ed in riferimento alle figure allegate: The invention is now described for illustrative and non-limiting purposes, according to a version currently preferred by the inventors and with reference to the attached figures:

Fig. 1 - Illustrazione schematica della vista in pianta del riflettore d'antenna. Fig. 2 - Illustrazione schematica della vista di fianco del riflettore d'antenna. Fig. 3 - Insieme della vista in pianta a), della vista di fianco b) e della vista frontale c). Fig. 1 - Schematic illustration of the plan view of the antenna reflector. Fig. 2 - Schematic illustration of the side view of the antenna reflector. Fig. 3 - Set of plan view a), side view b) and front view c).

Fig. 4 - Illustrazione schematica dei tre diagrammi di radiazione dell'antenna. Relativamente alla Fig. 4 si può notare come, in corrispondenza del picco di ciascuno dei tre fasci, la direttività degli altri due è molto bassa. Fig. 4 - Schematic illustration of the three radiation patterns of the antenna. With regard to Fig. 4 it can be seen that, in correspondence with the peak of each of the three beams, the directivity of the other two is very low.

Nella Fig. 1 è riportata una delle sagome di apertura, del riflettore 1, che possono essere assegnate allantenna in questione, in cui 3 indica il bordo (noto con l'espressione "RIM" nel linguaggio tecnico specifico); con 4 è indicato uno dei quattro vertici nei pressi di cui passa l'asse focale 5. L'asse focale è visibile in Fig. 2, nella Fig. 1 coincide con il punto 2. Gli elementi radianti 2 e le direzioni ottimali di funzionamento (rappresentate dalle diagonali 6 del riflettore) sono poste su due piani ortogonali. Fig. 1 shows one of the opening shapes, of the reflector 1, which can be assigned to the antenna in question, in which 3 indicates the edge (known with the expression "RIM" in the specific technical language); 4 indicates one of the four vertices near which the focal axis 5 passes. The focal axis is visible in Fig. 2, in Fig. 1 coincides with point 2. The radiating elements 2 and the optimal directions of operation (represented by the diagonals 6 of the reflector) are placed on two orthogonal planes.

L'antenna, oggetto dell'invenzione presentata, dunque, è stata studiata, come si è accennato prima, per applicazioni di tipo "DBS" ed in particolare essa risponde a requisiti i cui parametri vengono riportati di seguito a titolo illustrativo e non limitativo: The antenna, object of the invention presented, therefore, has been studied, as mentioned above, for "DBS" type applications and in particular it meets the requirements whose parameters are given below for illustrative and non-limiting purposes:

- Distanza angolare tra i fasci generati = 3,3 gradi. - Angular distance between the generated beams = 3.3 degrees.

Claims (3)

RIVENDICAZIONI 1. Antenna multifascio, caratterizzata dal fatto di avere sagoma dell' apertura di forma quadrata e superficie parabolica, di essere in grado di ricevere/trasmettere segnali alla stessa frequenza, in una o più direzioni, simultaneamente. CLAIMS 1. Multibeam antenna, characterized by having a square opening shape and parabolic surface, being able to receive / transmit signals at the same frequency, in one or more directions, simultaneously. 2. Antenna, secondo la Riv. 1, caratterizzata dal fatto che gli elementi radianti (2), (per ottenere le migliori prestazioni), sono posti sul piano focale ed allineati fra di loro, secondo la direzione definita dal piano di simmetria del riflettore (1) 2. Antenna, according to the Rev. 1, characterized by the fact that the radiating elements (2), (to obtain the best performance), are placed on the focal plane and aligned with each other, according to the direction defined by the plane of symmetry of the reflector (1) 3. Antenna, secondo le Riv. 1 e 2, caratterizzata dal fatto che gli elementi radianti (2) devono essere giacenti sul piano focale ed allineati fra di loro, secondo una direzione perpendicolare al piano di simmetria del riflettore. 3. Antenna, according to Riv. 1 and 2, characterized in that the radiating elements (2) must lie on the focal plane and aligned with each other, according to a direction perpendicular to the plane of symmetry of the reflector.
ITRM940117A 1994-03-03 1994-03-03 MULTI-BAND ANTENNA ABLE TO RECEIVE / TRANSMIT SIGNALS AT THE SAME FREQUENCY, FROM / TOWARDS MULTIPLE DIRECTIONS, SIMULTANEOUSLY. IT1271871B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ITRM940117A IT1271871B (en) 1994-03-03 1994-03-03 MULTI-BAND ANTENNA ABLE TO RECEIVE / TRANSMIT SIGNALS AT THE SAME FREQUENCY, FROM / TOWARDS MULTIPLE DIRECTIONS, SIMULTANEOUSLY.
DE69506928T DE69506928T2 (en) 1994-03-03 1995-03-01 Multi-beam antenna for the simultaneous reception / transmission of the same frequency signals from / in one or more coplanar directions
ES95830068T ES2128026T3 (en) 1994-03-03 1995-03-01 MULTIPLE BEAM ANTENNA ABLE TO RECEIVE / TRANSMIT SIGNALS OF THE SAME FREQUENCY, FROM / TO ONE OR MORE COPLANARY DIRECTIONS, SIMULTANEOUSLY.
EP95830068A EP0670609B1 (en) 1994-03-03 1995-03-01 Multibeam antenna capable of receiving/transmitting same frequency signals, from/to one or more coplanar directions, simultaneously

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITRM940117A IT1271871B (en) 1994-03-03 1994-03-03 MULTI-BAND ANTENNA ABLE TO RECEIVE / TRANSMIT SIGNALS AT THE SAME FREQUENCY, FROM / TOWARDS MULTIPLE DIRECTIONS, SIMULTANEOUSLY.

Publications (3)

Publication Number Publication Date
ITRM940117A0 ITRM940117A0 (en) 1994-03-03
ITRM940117A1 true ITRM940117A1 (en) 1995-09-03
IT1271871B IT1271871B (en) 1997-06-09

Family

ID=11402316

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM940117A IT1271871B (en) 1994-03-03 1994-03-03 MULTI-BAND ANTENNA ABLE TO RECEIVE / TRANSMIT SIGNALS AT THE SAME FREQUENCY, FROM / TOWARDS MULTIPLE DIRECTIONS, SIMULTANEOUSLY.

Country Status (4)

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

Families Citing this family (1)

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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605195A1 (en) * 1986-02-19 1987-08-20 Licentia Gmbh Antenna having a parabolic reflector
DE3885308D1 (en) * 1987-01-12 1993-12-09 Nec Corp Multi-beam antenna.
GB9022688D0 (en) * 1990-10-18 1990-11-28 D Mac Improvements in or relating to satellite antennae
FR2674377B1 (en) * 1991-03-22 1993-06-04 Alcatel Espace RADIOELECTRIC ANTENNA WITH MULTIFOCAL REFLECTOR.

Also Published As

Publication number Publication date
DE69506928T2 (en) 1999-08-12
IT1271871B (en) 1997-06-09
ITRM940117A0 (en) 1994-03-03
EP0670609B1 (en) 1998-12-30
DE69506928D1 (en) 1999-02-11
ES2128026T3 (en) 1999-05-01
EP0670609A1 (en) 1995-09-06

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