EP0286716A2 - Antennensystem für exoatmosphärische Flugkörper - Google Patents

Antennensystem für exoatmosphärische Flugkörper Download PDF

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Publication number
EP0286716A2
EP0286716A2 EP87113224A EP87113224A EP0286716A2 EP 0286716 A2 EP0286716 A2 EP 0286716A2 EP 87113224 A EP87113224 A EP 87113224A EP 87113224 A EP87113224 A EP 87113224A EP 0286716 A2 EP0286716 A2 EP 0286716A2
Authority
EP
European Patent Office
Prior art keywords
antenna system
antenna
base member
shield
feeder
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Withdrawn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
EP87113224A
Other languages
English (en)
French (fr)
Other versions
EP0286716A3 (de
Inventor
Quiniro Rioli
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.)
Contraves Italiana SpA
Original Assignee
Contraves Italiana 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 Contraves Italiana SpA filed Critical Contraves Italiana SpA
Publication of EP0286716A2 publication Critical patent/EP0286716A2/de
Publication of EP0286716A3 publication Critical patent/EP0286716A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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 [2D], e.g. paraboloidal
    • H01Q15/161—Collapsible reflectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
    • H01Q1/281—Nose antennas

Definitions

  • This invention relates to an antenna system for exo­atmospheric seekers, for use in exoatmospheric missiles.
  • the seeker is provided with an antenna for re­ceiving and possibly transmitting electromagnetic waves. Since a high tracking accuracy and a high angular dis­crimination are required, the antenna should be as large as possible, since the accuracy increases with the an­tenna surface.
  • the physical size, and more par­ticularly the diameter, of the missile body has placed a limit on the effective size, or diameter,of the antenna, and therefore on its performance (beam width, side lobes, gain, etc.), because, as well known, the antenna specifi­cations depend to a large extent on such parameter (for instance, the beam width, for a given tapering and ope­rating frequency, is inversely proportional to the an­tenna diameter).
  • a main object of the invention is to provide an antenna system for seekers for exoatmospheric missi­les which overcomes the problem of size limitation and has an improved performance over prior antennas install­ed on missiles.
  • an antenna system for see­kers for exoatmospheric missiles comprising:
  • a substantially cylindrical seeker mis­sile 10 is propelled by a rocket engine 12.
  • seeker 10 is provided with a ring-­shaped base member 14, rotatably mounted on a fixed mem­ber 16 that is rigidly attached at the forward tip of the missile body.
  • Base member 14 is provided with a set of peripherally distributed nozzles 18, inclined with re­spect to the radial direction, and adapted to be supplied with compressed air by means not shown, when it is de­sired to activate the antenna to its operative condition, as explained below.
  • an antenna feeder extends axially and forwardly to the missile, and comprises a waveguide 20 terminating in a conventional in­verted horn 22 for radiating electromagnetic waves gene­rally in the direction of the arrows in Fig. 2.
  • the wave­guide is connected to radio receiving and or transmitting means (not shown) located within the missile body.
  • the reflector is folded down, or packed to a furled, unoperative condition around the axial feeder 20, 22.
  • a rigid shield preferably comprising two sections or cheeks 26, 28 extends around and encloses the furled re­flector and is adapted to be released and discarded when the missile has exited the atmosphere and is flying in exoatmospheric space.
  • the reflector can spread to a dia­meter several times as large as the diameter of the mis­ sile body, without any adverse effect either on the be­haviour of the missile or on the integrity of the an­tenna system.
  • Fig. 4 shows an alternative embodiment of an extendable antenna system according to the invention.
  • the reflector is a conical metal sheet 30 that is normally coiled up in a furled, unoperative condition, as shown in full lines on the Figure. When the reflector is required to become operative, metal sheet 30 is released to spread out to its extended condition, as shown in dotted lines.
  • the feeder in this case is a slotted waveguide 32.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)
  • Support Of Aerials (AREA)
EP87113224A 1987-04-16 1987-09-10 Antennensystem für exoatmosphärische Flugkörper Withdrawn EP0286716A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT20147/87A IT1203912B (it) 1987-04-16 1987-04-16 Impianto d'antenna per missili exoatmosferici
IT2014787 1987-04-16

Publications (2)

Publication Number Publication Date
EP0286716A2 true EP0286716A2 (de) 1988-10-19
EP0286716A3 EP0286716A3 (de) 1988-11-30

Family

ID=11164185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113224A Withdrawn EP0286716A3 (de) 1987-04-16 1987-09-10 Antennensystem für exoatmosphärische Flugkörper

Country Status (3)

Country Link
EP (1) EP0286716A3 (de)
CA (1) CA1285649C (de)
IT (1) IT1203912B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2867616A1 (fr) * 2004-03-11 2005-09-16 Commissariat Energie Atomique Systeme d'illumination radioelectrique a reflecteur d'ondes
US10353064B2 (en) 2016-05-26 2019-07-16 Decisive Analytics Corporation Method and apparatus for detecting airborne objects
CN112086726A (zh) * 2020-08-26 2020-12-15 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) 一种采用蜗轮蜗杆传动展开的天线结构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750321A (en) * 1951-09-04 1956-06-12 Raymond De Icer And Engineerin Antennas and material for fabrication thereof
US3176303A (en) * 1962-02-21 1965-03-30 Whittaker Corp Collapsible antenna with plurality of flexible reflector petals releasably retained
US3286259A (en) * 1964-04-30 1966-11-15 Goodyear Aerospace Corp Unfurlable reflector
DE2460807C3 (de) * 1974-12-21 1981-04-02 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Flächenhaftes Leichtbauteil aus faserverstärktem Kunststoff

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2867616A1 (fr) * 2004-03-11 2005-09-16 Commissariat Energie Atomique Systeme d'illumination radioelectrique a reflecteur d'ondes
US10353064B2 (en) 2016-05-26 2019-07-16 Decisive Analytics Corporation Method and apparatus for detecting airborne objects
CN112086726A (zh) * 2020-08-26 2020-12-15 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) 一种采用蜗轮蜗杆传动展开的天线结构

Also Published As

Publication number Publication date
CA1285649C (en) 1991-07-02
EP0286716A3 (de) 1988-11-30
IT8720147A0 (it) 1987-04-16
IT1203912B (it) 1989-02-23

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Inventor name: RIOLI, QUINIRO