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GB2396969A - Structures with magnetic properties - Google Patents

Structures with magnetic properties Download PDF

Info

Publication number
GB2396969A
GB2396969A GB0406558A GB0406558A GB2396969A GB 2396969 A GB2396969 A GB 2396969A GB 0406558 A GB0406558 A GB 0406558A GB 0406558 A GB0406558 A GB 0406558A GB 2396969 A GB2396969 A GB 2396969A
Authority
GB
United Kingdom
Prior art keywords
roll
width
wound
sleeve
overhang
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Withdrawn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
GB0406558A
Other versions
GB0406558D0 (en
Inventor
Michael Charles Keog Wiltshire
Timothy Charles Steele
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.)
Marconi UK Intellectual Property Ltd
Original Assignee
Marconi UK Intellectual Property 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 Marconi UK Intellectual Property Ltd filed Critical Marconi UK Intellectual Property Ltd
Publication of GB0406558D0 publication Critical patent/GB0406558D0/en
Publication of GB2396969A publication Critical patent/GB2396969A/en
Withdrawn legal-status Critical Current

Links

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
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

A microstructured material consists of an array of Swiss roll resonant elements having capacitance and inductance such that the structure exhibits a predetermined magnetic permeability at r.f. frequencies, wherein at least one of the elongate means consisting for example of a roll of conducting material (3) wound interspersed with insulating material on a mandrel (4) is tuned to a desired frequency by applying a sleeve wound into roll, to an end of the Swiss roll at a given overhang (x), and of an appropriate width, which can be determined for example from reference measurements showing the width necessary to make a desired adjustment. The adjustment could also be made by selecting a suitable overhang for a given width of sleeve.

Description

GB 2396969 A continuation (74) Agent and/or Address for Service: Marconi
UK Intellectual Property Ad PO Box 53, New Century Park, Coventry, CV3 1HJ, United Kingdom
GB0406558A 2001-10-08 2002-09-27 Structures with magnetic properties Withdrawn GB2396969A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0124088A GB2380860A (en) 2001-10-08 2001-10-08 Structures with magnetic properties
PCT/GB2002/004376 WO2003032438A1 (en) 2001-10-08 2002-09-27 Structures with magnetic properties

Publications (2)

Publication Number Publication Date
GB0406558D0 GB0406558D0 (en) 2004-04-28
GB2396969A true GB2396969A (en) 2004-07-07

Family

ID=9923393

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0124088A Withdrawn GB2380860A (en) 2001-10-08 2001-10-08 Structures with magnetic properties
GB0406558A Withdrawn GB2396969A (en) 2001-10-08 2002-09-27 Structures with magnetic properties

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0124088A Withdrawn GB2380860A (en) 2001-10-08 2001-10-08 Structures with magnetic properties

Country Status (2)

Country Link
GB (2) GB2380860A (en)
WO (1) WO2003032438A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439337A2 (en) * 1990-01-25 1991-07-31 Yoshiyuki Naito Broad-band wave absorber
US5812080A (en) * 1995-12-27 1998-09-22 Takahashi; Michiharu Broad-band radio wave absorber
WO2000041270A1 (en) * 1999-01-04 2000-07-13 Marconi Caswell Limited Structure with magnetic properties

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2360138A (en) * 2000-03-06 2001-09-12 Marconi Caswell Ltd Screens for RF magnetic flux

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439337A2 (en) * 1990-01-25 1991-07-31 Yoshiyuki Naito Broad-band wave absorber
US5812080A (en) * 1995-12-27 1998-09-22 Takahashi; Michiharu Broad-band radio wave absorber
WO2000041270A1 (en) * 1999-01-04 2000-07-13 Marconi Caswell Limited Structure with magnetic properties

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CRYOGENICS, vol. 35, no.5, 1 May 1995 (GUILFORD), T Sasaki, "Generation of homogenous high magnetic fields...", pages 339 - 343 *

Also Published As

Publication number Publication date
GB0124088D0 (en) 2001-11-28
GB0406558D0 (en) 2004-04-28
GB2380860A (en) 2003-04-16
WO2003032438A1 (en) 2003-04-17

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)