AU2001237575A1 - Novel grating - Google Patents

Novel grating

Info

Publication number
AU2001237575A1
AU2001237575A1 AU2001237575A AU3757501A AU2001237575A1 AU 2001237575 A1 AU2001237575 A1 AU 2001237575A1 AU 2001237575 A AU2001237575 A AU 2001237575A AU 3757501 A AU3757501 A AU 3757501A AU 2001237575 A1 AU2001237575 A1 AU 2001237575A1
Authority
AU
Australia
Prior art keywords
gap
grating
members
novel grating
16lambdag
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.)
Abandoned
Application number
AU2001237575A
Inventor
Christopher Robert Lawrence
John Roy Sambles
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.)
Qinetiq Ltd
Original Assignee
Qinetiq Ltd
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 Qinetiq Ltd filed Critical Qinetiq Ltd
Publication of AU2001237575A1 publication Critical patent/AU2001237575A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • 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
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
    • H01Q15/002—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices being reconfigurable or tunable, e.g. using switches or diodes
    • 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
    • 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
    • H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Liquid Crystal (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Electroluminescent Light Sources (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Glass Compositions (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

A grating comprising a plurality of substantially parallel members having a conducting surface of depth L, separated by a dielectric layer gap, and having of pitch lambdag and where L>16lambdag. The members are preferably metallic or comprise metallic foil covered plastic. The gap may be filled wholly or partially with dielectric material including liquid crystal whose refractive index can be controlled by suitable application of voltage across the gap.
AU2001237575A 2000-03-11 2001-03-07 Novel grating Abandoned AU2001237575A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0005788 2000-03-11
GBGB0005788.5A GB0005788D0 (en) 2000-03-11 2000-03-11 Novel grating
PCT/GB2001/000976 WO2001069718A1 (en) 2000-03-11 2001-03-07 Novel grating

Publications (1)

Publication Number Publication Date
AU2001237575A1 true AU2001237575A1 (en) 2001-09-24

Family

ID=9887360

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001237575A Abandoned AU2001237575A1 (en) 2000-03-11 2001-03-07 Novel grating

Country Status (8)

Country Link
US (1) US6703979B2 (en)
EP (1) EP1264364B1 (en)
AT (1) ATE254808T1 (en)
AU (1) AU2001237575A1 (en)
CA (1) CA2401509C (en)
DE (1) DE60101263T2 (en)
GB (1) GB0005788D0 (en)
WO (1) WO2001069718A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3221897A1 (en) * 2014-09-08 2017-09-27 The Research Foundation Of State University Of New York Metallic gratings and measurement methods thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607009A (en) 1948-10-08 1952-08-12 Philco Corp Electromagnetic wave transmissive structure
US4323901A (en) * 1980-02-19 1982-04-06 Rockwell International Corporation Monolithic, voltage controlled, phased array
US4588994A (en) * 1982-10-18 1986-05-13 Hughes Aircraft Company Continuous ferrite aperture for electronic scanning antennas
US4551692A (en) * 1984-03-28 1985-11-05 United Technologies Corporation Monolithic polarizer grating
JP3308558B2 (en) 1991-05-02 2002-07-29 富士通株式会社 Antenna module
US5450092A (en) * 1993-04-26 1995-09-12 Das; Satyendranath Ferroelectric scanning RF antenna
US5729239A (en) 1995-08-31 1998-03-17 The United States Of America As Represented By The Secretary Of The Navy Voltage controlled ferroelectric lens phased array

Also Published As

Publication number Publication date
WO2001069718A8 (en) 2002-01-03
CA2401509A1 (en) 2001-09-20
DE60101263D1 (en) 2003-12-24
EP1264364A2 (en) 2002-12-11
DE60101263T2 (en) 2004-08-26
ATE254808T1 (en) 2003-12-15
US6703979B2 (en) 2004-03-09
CA2401509C (en) 2010-05-18
US20030058188A1 (en) 2003-03-27
EP1264364B1 (en) 2003-11-19
GB0005788D0 (en) 2000-05-03
WO2001069718A1 (en) 2001-09-20

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