WO1988010521A1 - Antenne receptrice repliable - Google Patents

Antenne receptrice repliable Download PDF

Info

Publication number
WO1988010521A1
WO1988010521A1 PCT/GB1988/000465 GB8800465W WO8810521A1 WO 1988010521 A1 WO1988010521 A1 WO 1988010521A1 GB 8800465 W GB8800465 W GB 8800465W WO 8810521 A1 WO8810521 A1 WO 8810521A1
Authority
WO
WIPO (PCT)
Prior art keywords
receiving
antenna
signals
cylindrical member
zone plate
Prior art date
Application number
PCT/GB1988/000465
Other languages
English (en)
Inventor
Thomas Michael Benyon Wright
Original Assignee
Thomas Michael Benyon Wright
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 Thomas Michael Benyon Wright filed Critical Thomas Michael Benyon Wright
Publication of WO1988010521A1 publication Critical patent/WO1988010521A1/fr

Links

Classifications

    • 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
    • H01Q1/085—Flexible aerials; Whip aerials with a resilient base
    • H01Q1/087—Extensible roll- up aerials
    • 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
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • 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
    • H01Q19/06—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 refracting or diffracting devices, e.g. lens
    • H01Q19/062—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 refracting or diffracting devices, e.g. lens for focusing
    • H01Q19/065—Zone plate type antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials

Definitions

  • This invention relates to antenna for microwave signal reception, and in particular to flat antennas for receiving direct television or digital data transmissions from broadcast satellites or local broadcasting antenna such as may be employed in community television stations.
  • Satellite transmissions for example, are currently most commonly received by parabolic reflectors in association with a waveguide horn feed. It is essential that the axis of the assembly is pointed at the satellite, requiring accurate mechanical positioning specific to the geographical location of the receiving site, with the main aperture of the assembly being inclined to the local vertical. It is usually a consequence of the size and complexity of such antennas that they must be installed externally to the building in which the received data will be used, and cannot readily be re-aligned to different satellites.
  • the mounting has to be sufficiently rigid to ensu e that correct alignment of the axis of the line-of- ⁇ ight to the transmitting satellite is maintained under all conditions, and both the initial installation, which is expensive, and subsequent re-alignment to other satellites are specialised tasks.
  • Fresnel zone plates may also be used as antennas for focussing signals.
  • a zone plate consists of a thin sheet of any material transparent to the incident radiation, which carries a set of concentric circular zones, opaque to «the radiation, such that the dark and light zones alternate, their diameters being determined by a very simple mathematical relationship. Provided that the plane of the zone plate is at
  • the position of the horn may be altered to allow reception of signals from different satellites.
  • the provision of a permanent reception facility may be both unnecessary and undesirable.
  • an antenna for receiving microwave signals comprises receiving or focussing means adapted to receive said signals, means for arranging the receiving means into a storage position and into a receiving position, the antenna being substantially flat when in the said receiving position.
  • the receiving or focussing means is a flexible Fresnel zone plate arranged to focus the signals on a horn feed and the means for arranging the receiving means comprises a cylindrical member around which the receiving means is wound when in said storage position, the cylindrical member being rotatable to allow the receiving means to be unwound to the said receiving position.
  • the invention is applicable to a variety of different types of flat antenna.
  • the receiving or focussing means may be a printed dipole array. It will also be appreciated that the use of the term “receiving” is deemed to include the term “focussing”.
  • Figure 1 depicts an antenna in accordance with the present invention
  • Figure 2 depicts a Fresnel zone plate suitable for use as the receiving means in the present invention.
  • the plastic sheet 1 comprises a Fresnel zone plate region 2 which acts as the receiving means for incident signals, focusing the signals onto a waveguide horn feed 10.
  • the plastic sheet 1 may be wound around cylindrical member 3 for storage but is actually depicted fully unwound in front of a window 4. Signals 5 incident upon the window are transmitted through to the zone plate region 2 and consequently focused on waveguide horn feed 10.
  • the cylindrical member 3 i ⁇ rotatably mounted at each end on fixture means 6 which are themselves attached to the window frame 7.
  • the cylindrical member 3 may further comprise a conventional roller blind mechamism facilitating the raising and lowering of the plastic sheet 1 from the storage position to the receiving position.
  • the waveguide horn feed 10 may conveniently be mounted on a table 11 and connected to a modem 12 supplying the input signal to a computer 13 or television (not shown) .
  • a Fresnel zone plate consi ⁇ ting of a circular system of zones will focus radiation on a point on the perpendicular axis intersecting the plane of the zone plate, provided that the plane is at 90° to the line of sight of the radiation source. Since this requirement would not be met, by for instance, direct broadcasting satellites radiating onto vertical receivers, modification of the circular system of zones is required. The modification is such that the zone plate pattern becomes a set of ellipses, the ellipses not having a common centre but instead being displaced along their common major axes. Such a zone plate is depicted in Figure 2.
  • the radii of the transparent zones 22 and reflecting or absorbing zones 21 are such that the distance from the zone edges to the focal point (i.e. the waveguide horn feed 10) increases by half a wavelength of the incident radiation between adjacent zones, the distance of the focal point to the centre of the first, i.e. central, zone being approximately 1.5 time the width of the largest zone.
  • the plastic sheet 1 may be approximately 50 microns thick and have deposited on it successive zones of an absorbing or reflecting coating such as silver, nickel, aluminium or graphite ink or paint as are commonly used for silk screen printing of electrical circuits, protective coating against electronic interference, or decorative purposes.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Des antennes plates constituées par exemple de panneaux à zone de Fresnel peuvent être utilisées pour recevoir des signaux de micro-ondes. De telles antennes sont montées sur des fenêtres (4) et focalisent les signaux sur un cornet d'alimentation (10). La présente invention se rapporte à un panneau à zone de Fresnel flexible (1) destiné à être enroulé sur un élément cylindrique (3) similaire aux éléments cylindriques utilisés dans un store roulant. L'antenne peut ainsi être rapidement montée contre une fenêtre (4) et le panneau à zone de Fresnel déroulé pour recevoir les signaux.
PCT/GB1988/000465 1987-06-16 1988-06-15 Antenne receptrice repliable WO1988010521A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8713957 1987-06-16
GB878713957A GB8713957D0 (en) 1987-06-16 1987-06-16 Antenna systems

Publications (1)

Publication Number Publication Date
WO1988010521A1 true WO1988010521A1 (fr) 1988-12-29

Family

ID=10618933

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1988/000465 WO1988010521A1 (fr) 1987-06-16 1988-06-15 Antenne receptrice repliable

Country Status (2)

Country Link
GB (1) GB8713957D0 (fr)
WO (1) WO1988010521A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014696A1 (fr) * 1989-05-19 1990-11-29 Stefan Johansson Appareil d'antenne muni d'un reflecteur ou d'une lentille comprenant un reseau balaye en frequence
GB2234117A (en) * 1989-07-19 1991-01-23 David Scott Satellite reception window
GB2236019A (en) * 1989-09-14 1991-03-20 Pilkington Plc Microwave focussing device
ES2104496A1 (es) * 1994-07-12 1997-10-01 Campos Irujo Antonio Reflector para microondas electromagneticas.
EP1085599A2 (fr) * 1999-09-14 2001-03-21 Navsys Corporation Réseau d'antennes à commande de phase
US6473049B2 (en) 2000-12-07 2002-10-29 Asahi Glass Company, Limited Antenna device
US7136227B2 (en) 2004-08-06 2006-11-14 Matsushita Electric Industrial Co., Ltd. Fresnel zone plate based on elastic materials
US8384614B2 (en) 2010-09-30 2013-02-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Deployable wireless Fresnel lens
JP2015138999A (ja) * 2014-01-20 2015-07-30 株式会社国際電気通信基礎技術研究所 レンズアンテナ装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR795689A (fr) * 1935-09-10 1936-03-19 Henri Rault & Cie Application des stores ou rideaux de vitrage ou de tenture comportant un réseau de fils métalliques à la constitution d'antennes réceptrices pour postes radiophoniques
FR1253442A (fr) * 1960-02-25 1961-02-10 Antenne de télévision ou de t. s. f.
US3059322A (en) * 1961-03-17 1962-10-23 Grady L Teague Method of making a collapsible antenna of wire mesh
US3524190A (en) * 1967-11-20 1970-08-11 Ryan Aeronautical Co Extendable radio frequency transmission line and antenna structure
US4445121A (en) * 1981-12-18 1984-04-24 General Dynamics Corporation/Convair Div. Single membrane lens for space radar using microstrip antenna radiating elements

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR795689A (fr) * 1935-09-10 1936-03-19 Henri Rault & Cie Application des stores ou rideaux de vitrage ou de tenture comportant un réseau de fils métalliques à la constitution d'antennes réceptrices pour postes radiophoniques
FR1253442A (fr) * 1960-02-25 1961-02-10 Antenne de télévision ou de t. s. f.
US3059322A (en) * 1961-03-17 1962-10-23 Grady L Teague Method of making a collapsible antenna of wire mesh
US3524190A (en) * 1967-11-20 1970-08-11 Ryan Aeronautical Co Extendable radio frequency transmission line and antenna structure
US4445121A (en) * 1981-12-18 1984-04-24 General Dynamics Corporation/Convair Div. Single membrane lens for space radar using microstrip antenna radiating elements

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE Northeast Electronics Research and Engineering Meeting, NEREM Record 1966, (Boston, US), R.M. Dickinson et al.: "A survey of unfurlable spacecraft antennas", pages 222-223 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014696A1 (fr) * 1989-05-19 1990-11-29 Stefan Johansson Appareil d'antenne muni d'un reflecteur ou d'une lentille comprenant un reseau balaye en frequence
GB2234117A (en) * 1989-07-19 1991-01-23 David Scott Satellite reception window
GB2236019A (en) * 1989-09-14 1991-03-20 Pilkington Plc Microwave focussing device
GB2236019B (en) * 1989-09-14 1994-05-11 Pilkington Plc Microwave focussing device
ES2104496A1 (es) * 1994-07-12 1997-10-01 Campos Irujo Antonio Reflector para microondas electromagneticas.
EP1085599A2 (fr) * 1999-09-14 2001-03-21 Navsys Corporation Réseau d'antennes à commande de phase
EP1085599A3 (fr) * 1999-09-14 2003-04-16 Navsys Corporation Réseau d'antennes à commande de phase
US6473049B2 (en) 2000-12-07 2002-10-29 Asahi Glass Company, Limited Antenna device
US7136227B2 (en) 2004-08-06 2006-11-14 Matsushita Electric Industrial Co., Ltd. Fresnel zone plate based on elastic materials
US8384614B2 (en) 2010-09-30 2013-02-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Deployable wireless Fresnel lens
JP2015138999A (ja) * 2014-01-20 2015-07-30 株式会社国際電気通信基礎技術研究所 レンズアンテナ装置

Also Published As

Publication number Publication date
GB8713957D0 (en) 1987-07-22

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