EP0290969A3 - Unfoldable antenna with two reflecting surfaces - Google Patents

Unfoldable antenna with two reflecting surfaces Download PDF

Info

Publication number
EP0290969A3
EP0290969A3 EP88107264A EP88107264A EP0290969A3 EP 0290969 A3 EP0290969 A3 EP 0290969A3 EP 88107264 A EP88107264 A EP 88107264A EP 88107264 A EP88107264 A EP 88107264A EP 0290969 A3 EP0290969 A3 EP 0290969A3
Authority
EP
European Patent Office
Prior art keywords
antenna
reflecting surfaces
reflector
sub
applications
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.)
Withdrawn
Application number
EP88107264A
Other languages
German (de)
French (fr)
Other versions
EP0290969A2 (en
Inventor
Giovanni Manoni
Enrico Nisi
Giorgio Perrotta
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.)
Alenia Spazio 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 EP0290969A2 publication Critical patent/EP0290969A2/en
Publication of EP0290969A3 publication Critical patent/EP0290969A3/en
Withdrawn legal-status Critical Current

Links

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
    • H01Q19/18—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 having two or more spaced reflecting surfaces
    • H01Q19/19—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 having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
    • 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
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
    • H01Q15/161—Collapsible reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Antenna consisting of a main reflecting surface (1), a sub reflector (2) and an unfolding device of the secondary surface, made up of the following primary parts: a motor (3); a supporting structure (4) for the sub-reflector and a telescopic positioning rod (5).
The antenna, so configured, minimizes space occupancy problems during the launch phase of satellites for space applications and during transportation, for ground applications, yet assuring that correct positioning of the reflecting surfaces takes place during operation.
EP88107264A 1987-05-15 1988-05-06 Unfoldable antenna with two reflecting surfaces Withdrawn EP0290969A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4794687 1987-05-15
IT47946/87A IT1205964B (en) 1987-05-15 1987-05-15 ANTENNA WITH TWO REFLECTIVE SURFACES AND SUB-REFLECTOR AVAILABLE

Publications (2)

Publication Number Publication Date
EP0290969A2 EP0290969A2 (en) 1988-11-17
EP0290969A3 true EP0290969A3 (en) 1990-03-28

Family

ID=11263532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107264A Withdrawn EP0290969A3 (en) 1987-05-15 1988-05-06 Unfoldable antenna with two reflecting surfaces

Country Status (2)

Country Link
EP (1) EP0290969A3 (en)
IT (1) IT1205964B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646564A (en) * 1969-03-03 1972-02-29 Raytheon Co Antenna slew system
FR2517626A1 (en) * 1981-12-04 1983-06-10 Europ Agence Spatiale ORBITAL SPACE ENGINE, IN PARTICULAR SATELLITE, WITH MULTIPLE MISSIONS
EP0152221A2 (en) * 1984-02-09 1985-08-21 THE GENERAL ELECTRIC COMPANY, p.l.c. An earth terminal for satellite communication systems
EP0181221A2 (en) * 1984-11-07 1986-05-14 THE GENERAL ELECTRIC COMPANY, p.l.c. Reflector Arrangement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051004A (en) * 1983-08-30 1985-03-22 Nec Corp Parabolic antenna for loading on artificial satellite

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646564A (en) * 1969-03-03 1972-02-29 Raytheon Co Antenna slew system
FR2517626A1 (en) * 1981-12-04 1983-06-10 Europ Agence Spatiale ORBITAL SPACE ENGINE, IN PARTICULAR SATELLITE, WITH MULTIPLE MISSIONS
EP0152221A2 (en) * 1984-02-09 1985-08-21 THE GENERAL ELECTRIC COMPANY, p.l.c. An earth terminal for satellite communication systems
EP0181221A2 (en) * 1984-11-07 1986-05-14 THE GENERAL ELECTRIC COMPANY, p.l.c. Reflector Arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 178 (E-330)[1901], 23rd July 1985; & JP-A-60 051 004 (NIPPON DENKI K.K.) 22-03-1985 *

Also Published As

Publication number Publication date
EP0290969A2 (en) 1988-11-17
IT8747946A0 (en) 1987-05-15
IT1205964B (en) 1989-04-05

Similar Documents

Publication Publication Date Title
CA2160801A1 (en) Msat mast antenna with reduced frequency scanning
AU3394489A (en) Monopole/l-shaped parasitic elements for circularly/ eliptically polarized wave transceiving
JPS57198200A (en) Device for mounting member for spaceship
AU4306000A (en) Antenna with continuous reflector for multiple reception of satellite beams
EP0930669A3 (en) Antenna for communicating with low earth orbit satellite
JP2001060812A (en) Expansion of two-reflector system
EP0290969A3 (en) Unfoldable antenna with two reflecting surfaces
IE45314L (en) Satellite communication transmission systems
EP0921590A3 (en) Antenna for communicating with low earth orbit satellite
JPH0145762B2 (en)
ATE515814T1 (en) ANTENNA ARRANGEMENT FOR RECEIVING SIGNALS EMITTED BY GEOSTATIONARY SATELLITES
US4761655A (en) Transportable antenna for an earth station
EP0838877A3 (en) Deployable reflectors
JP2607610B2 (en) Portable antenna device
JPS6022599A (en) Double spin satellite
BR9000693A (en) ANTENNA SYSTEM FOR RECEIVING DIRECT DIFFUSION SATELLITE
DE59001755D1 (en) ANTENNA WITH PARABOLIC REFLECTOR.
AU6111094A (en) Device for the restitution of the orbit of celestial bodies, particularly artificial satellites, by deviatiometry
JPS59105703A (en) Antenna
AU7265091A (en) Reflecting mirror-equipped gps receiving antenna apparatus
JPH08113199A (en) Artificial satellite
DE59006398D1 (en) Antenna with parabolic reflector.
Gonzalez et al. A New Satellite Communication Antenna for Aegis Class Destroyers
Wimmer Eureca re-flights- Opportunities for very-low-cost and cost-efficient space missions
Katow et al. Potential surface improvements by bump removal for 64-m antenna

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: A2

Designated state(s): AT BE CH DE ES FR GB LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB LI NL SE

17P Request for examination filed

Effective date: 19900926

17Q First examination report despatched

Effective date: 19921002

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930213