IT1278530B1 - Antenna a riflettore specialmente per un satellite per comunicazioni - Google Patents
Antenna a riflettore specialmente per un satellite per comunicazioniInfo
- Publication number
- IT1278530B1 IT1278530B1 IT95MI002597A ITMI952597A IT1278530B1 IT 1278530 B1 IT1278530 B1 IT 1278530B1 IT 95MI002597 A IT95MI002597 A IT 95MI002597A IT MI952597 A ITMI952597 A IT MI952597A IT 1278530 B1 IT1278530 B1 IT 1278530B1
- Authority
- IT
- Italy
- Prior art keywords
- satellite
- communications
- reflector antenna
- antenna especially
- reflector
- Prior art date
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
- H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
- H01Q3/16—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device
- H01Q3/20—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device wherein the primary active element is fixed and the reflecting device is movable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
-
- 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
- H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
- H01Q3/16—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device
- H01Q3/18—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device wherein the primary active element is movable and the reflecting device is fixed
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4444724 | 1994-12-15 | ||
DE4444725 | 1994-12-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI952597A0 ITMI952597A0 (it) | 1995-12-12 |
ITMI952597A1 ITMI952597A1 (it) | 1997-06-12 |
IT1278530B1 true IT1278530B1 (it) | 1997-11-24 |
Family
ID=25942883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT95MI002597A IT1278530B1 (it) | 1994-12-15 | 1995-12-12 | Antenna a riflettore specialmente per un satellite per comunicazioni |
Country Status (3)
Country | Link |
---|---|
US (1) | US5684494A (it) |
DE (1) | DE19544500C2 (it) |
IT (1) | IT1278530B1 (it) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6078298A (en) * | 1998-10-26 | 2000-06-20 | Terk Technologies Corporation | Di-pole wide bandwidth antenna |
DE19945062A1 (de) * | 1999-09-20 | 2001-04-12 | Daimler Chrysler Ag | Reflektor mit geformter Oberfläche und räumlich getrennten Foki zur Ausleuchtung identischer Gebiete, Antennensystem und Verfahren zur Oberflächenermittlung |
US6243048B1 (en) * | 2000-02-04 | 2001-06-05 | Space Systems/Loral, Inc. | Gregorian reflector antenna system having a subreflector optimized for an elliptical antenna aperture |
US9736209B2 (en) | 2000-03-17 | 2017-08-15 | Facebook, Inc. | State change alerts mechanism |
US7624172B1 (en) | 2000-03-17 | 2009-11-24 | Aol Llc | State change alerts mechanism |
DE60120909T2 (de) * | 2001-03-22 | 2007-02-08 | Alcatel | Doppeltreflektor-Antenne mit Ablenker |
US6492955B1 (en) | 2001-10-02 | 2002-12-10 | Ems Technologies Canada, Ltd. | Steerable antenna system with fixed feed source |
US6677911B2 (en) | 2002-01-30 | 2004-01-13 | Prodelin Corporation | Antenna feed assembly capable of configuring communication ports of an antenna at selected polarizations |
US6747604B2 (en) | 2002-10-08 | 2004-06-08 | Ems Technologies Canada, Inc. | Steerable offset antenna with fixed feed source |
US8122137B2 (en) | 2002-11-18 | 2012-02-21 | Aol Inc. | Dynamic location of a subordinate user |
US7640306B2 (en) | 2002-11-18 | 2009-12-29 | Aol Llc | Reconfiguring an electronic message to effect an enhanced notification |
US7899862B2 (en) | 2002-11-18 | 2011-03-01 | Aol Inc. | Dynamic identification of other users to an online user |
EP1565830A4 (en) | 2002-11-18 | 2008-03-12 | America Online Inc | LISTS OF PEOPLE |
US8005919B2 (en) | 2002-11-18 | 2011-08-23 | Aol Inc. | Host-based intelligent results related to a character stream |
US7428580B2 (en) | 2003-11-26 | 2008-09-23 | Aol Llc | Electronic message forwarding |
US8701014B1 (en) | 2002-11-18 | 2014-04-15 | Facebook, Inc. | Account linking |
US8965964B1 (en) | 2002-11-18 | 2015-02-24 | Facebook, Inc. | Managing forwarded electronic messages |
US7590696B1 (en) | 2002-11-18 | 2009-09-15 | Aol Llc | Enhanced buddy list using mobile device identifiers |
US20040205127A1 (en) | 2003-03-26 | 2004-10-14 | Roy Ben-Yoseph | Identifying and using identities deemed to be known to a user |
US7653693B2 (en) | 2003-09-05 | 2010-01-26 | Aol Llc | Method and system for capturing instant messages |
US7236681B2 (en) * | 2003-09-25 | 2007-06-26 | Prodelin Corporation | Feed assembly for multi-beam antenna with non-circular reflector, and such an assembly that is field-switchable between linear and circular polarization modes |
ITRM20060418A1 (it) * | 2006-08-03 | 2008-02-04 | Tes Teleinformatica E Sistemi Srl | Antenna a doppio riflettore a basso profilo a puntamento meccanico |
US9281561B2 (en) * | 2009-09-21 | 2016-03-08 | Kvh Industries, Inc. | Multi-band antenna system for satellite communications |
US9634399B1 (en) * | 2013-11-12 | 2017-04-25 | L-3 Communications Corp. | Antenna for transmitting partial orbital angular momentum beams |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3277490A (en) * | 1962-12-20 | 1966-10-04 | Radiation Inc | Broadband conical scan feed for parabolic antennas |
US3939480A (en) * | 1974-09-17 | 1976-02-17 | The United States Of America As Represented By The Secretary Of The Navy | Level and cross-level stabilization technique for search radar antennas |
GB1603657A (en) * | 1977-09-13 | 1981-11-25 | Marconi Co Ltd | Systems for the transmission and/or reception of electromagnetic waves |
FR2412961A1 (fr) * | 1977-12-22 | 1979-07-20 | Thomson Csf | Systeme d'antenne a balayage conique pour radar de poursuite |
FR2445040A1 (fr) * | 1978-12-22 | 1980-07-18 | Thomson Csf | Antenne a balayage conique pour radar, notamment radar de poursuite |
FR2472853A1 (fr) * | 1979-12-27 | 1981-07-03 | Thomson Csf | Antenne a faisceau orientable et satellite comportant une telle antenne |
US4274098A (en) * | 1980-03-07 | 1981-06-16 | The United States Of America As Represented By The Secretary Of The Air Force | Loss-free scanning antenna |
US4574287A (en) * | 1983-03-04 | 1986-03-04 | The United States Of America As Represented By The Secretary Of The Navy | Fixed aperture, rotating feed, beam scanning antenna system |
US4668955A (en) * | 1983-11-14 | 1987-05-26 | Ford Aerospace & Communications Corporation | Plural reflector antenna with relatively moveable reflectors |
NL8400008A (nl) * | 1984-01-03 | 1985-08-01 | Hollandse Signaalapparaten Bv | Opstelling voor een rondzoekapparaat. |
FR2593646B1 (fr) * | 1986-01-28 | 1988-07-29 | Thomson Csf | Antenne radar a faible encombrement. |
US4939526A (en) * | 1988-12-22 | 1990-07-03 | Hughes Aircraft Company | Antenna system having azimuth rotating directive beam with selectable polarization |
DE3939318A1 (de) * | 1989-11-28 | 1991-05-29 | Siemens Ag | Satellitenfunk-bodenstationsantenne |
US5198827A (en) * | 1991-05-23 | 1993-03-30 | Hughes Aircraft Company | Dual reflector scanning antenna system |
-
1995
- 1995-11-29 DE DE19544500A patent/DE19544500C2/de not_active Expired - Fee Related
- 1995-12-12 IT IT95MI002597A patent/IT1278530B1/it active IP Right Grant
- 1995-12-15 US US08/574,444 patent/US5684494A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ITMI952597A1 (it) | 1997-06-12 |
ITMI952597A0 (it) | 1995-12-12 |
DE19544500A1 (de) | 1996-07-04 |
US5684494A (en) | 1997-11-04 |
DE19544500C2 (de) | 1999-07-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted |