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AU2001235867A1 - Structure with switchable magnetic properties - Google Patents

Structure with switchable magnetic properties

Info

Publication number
AU2001235867A1
AU2001235867A1 AU2001235867A AU3586701A AU2001235867A1 AU 2001235867 A1 AU2001235867 A1 AU 2001235867A1 AU 2001235867 A AU2001235867 A AU 2001235867A AU 3586701 A AU3586701 A AU 3586701A AU 2001235867 A1 AU2001235867 A1 AU 2001235867A1
Authority
AU
Australia
Prior art keywords
magnetic properties
switchable magnetic
switchable
properties
magnetic
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
AU2001235867A
Other languages
English (en)
Inventor
Michael Charles Keogh Wiltshire
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 Caswell Ltd
Original Assignee
Marconi Caswell 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 Caswell Ltd filed Critical Marconi Caswell Ltd
Publication of AU2001235867A1 publication Critical patent/AU2001235867A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • H01Q15/148—Reflecting surfaces; Equivalent structures with means for varying the reflecting properties

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Aerials With Secondary Devices (AREA)
AU2001235867A 2000-03-06 2001-03-06 Structure with switchable magnetic properties Abandoned AU2001235867A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0005356 2000-03-06
GB0005356A GB2360132B (en) 2000-03-06 2000-03-06 Structure with switchable magnetic properties
PCT/GB2001/000957 WO2001067549A2 (fr) 2000-03-06 2001-03-06 Structure a proprietes magnetiques commutables

Publications (1)

Publication Number Publication Date
AU2001235867A1 true AU2001235867A1 (en) 2001-09-17

Family

ID=9887050

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001235867A Abandoned AU2001235867A1 (en) 2000-03-06 2001-03-06 Structure with switchable magnetic properties

Country Status (8)

Country Link
US (1) US6801173B2 (fr)
EP (1) EP1279203A2 (fr)
JP (1) JP2003526423A (fr)
KR (1) KR20020086915A (fr)
CN (1) CN1428017A (fr)
AU (1) AU2001235867A1 (fr)
GB (1) GB2360132B (fr)
WO (1) WO2001067549A2 (fr)

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GB2360094A (en) 2000-03-06 2001-09-12 Marconi Caswell Ltd RF screens for MRI
GB2360138A (en) 2000-03-06 2001-09-12 Marconi Caswell Ltd Screens for RF magnetic flux
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US8721565B2 (en) * 2005-08-04 2014-05-13 Dune Medical Devices Ltd. Device for forming an effective sensor-to-tissue contact
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US8019411B2 (en) * 2002-01-04 2011-09-13 Dune Medical Devices Ltd. Probes, systems, and methods for examining tissue according to the dielectric properties thereof
US7809425B2 (en) * 2003-07-24 2010-10-05 Dune Medical Devices Ltd. Method and apparatus for examining a substance, particularly tissue, to characterize its type
US8032211B2 (en) * 2002-01-04 2011-10-04 Dune Medical Devices Ltd. Probes, systems, and methods for examining tissue according to the dielectric properties thereof
US7794629B2 (en) 2003-11-25 2010-09-14 Qinetiq Limited Composite materials
CN100349059C (zh) * 2004-03-16 2007-11-14 西北工业大学 可调谐层状微波负磁导率材料及其制造方法
CN1332261C (zh) * 2004-04-22 2007-08-15 西北工业大学 可调谐微波左手材料及其制造方法
CN1321349C (zh) * 2004-04-22 2007-06-13 西北工业大学 可调谐层状微波左手材料及其制造方法
CN1323323C (zh) * 2004-04-22 2007-06-27 西北工业大学 面缺陷调控的微波左手材料及其制造方法
US7205941B2 (en) * 2004-08-30 2007-04-17 Hewlett-Packard Development Company, L.P. Composite material with powered resonant cells
US7405866B2 (en) * 2004-11-19 2008-07-29 Hewlett-Packard Development Company, L.P. Composite material with controllable resonant cells
JP3928055B2 (ja) * 2005-03-02 2007-06-13 国立大学法人山口大学 負透磁率または負誘電率メタマテリアルおよび表面波導波路
ES2434851T3 (es) * 2005-03-29 2013-12-17 Dune Medical Devices Ltd. Sensores electromagnéticos para la caracterización de tejidos
CN1874067B (zh) * 2005-05-31 2010-05-26 西北工业大学 X波段左手材料微带天线
WO2006137575A1 (fr) * 2005-06-24 2006-12-28 National University Corporation Yamaguchi University Ligne composite de système de droite/gauche de type circuit à bande et ligne de système de gauche et antenne l’utilisant
CN1941502B (zh) * 2005-09-30 2010-12-08 西北工业大学 S波段含有开口谐振环的微带天线及其阵列
CN1941505B (zh) * 2005-09-30 2012-05-30 西北工业大学 C波段左手材料微带天线及其阵列
US7427762B2 (en) 2005-12-21 2008-09-23 Searete Llc Variable multi-stage waveform detector
US8207907B2 (en) * 2006-02-16 2012-06-26 The Invention Science Fund I Llc Variable metamaterial apparatus
JP4821002B2 (ja) * 2006-07-19 2011-11-24 国立大学法人山口大学 人工磁性体
US7777685B2 (en) * 2006-09-29 2010-08-17 Alcatel-Lucent Usa Inc. Small spherical antennas
RU2451946C2 (ru) * 2006-12-22 2012-05-27 Конинклейке Филипс Электроникс Н.В. Рч катушка для использования в мр системе формирования изображения
DE102007014135B4 (de) 2007-03-23 2010-11-11 Siemens Aktiengesellschaft Magnetresonanzanlage mit Hochfrequenzschirm mit frequenzabhängiger Schirmwirkung
JP5217494B2 (ja) 2007-05-08 2013-06-19 旭硝子株式会社 人工媒質、その製造方法およびアンテナ装置
CN101404356B (zh) * 2008-10-31 2012-07-04 浙江大学 利用条状金属单元结构天线罩的高指向天线
CN101404355B (zh) * 2008-10-31 2012-07-04 浙江大学 利用环状金属对单元结构天线罩的高指向天线
EP2521216A1 (fr) * 2011-04-27 2012-11-07 Research In Motion Limited Ensemble formant antenne utilisant des structures diélectriques métalliques
EP2518823B1 (fr) * 2011-04-27 2013-07-03 Research In Motion Limited Ensemble formant antenne utilisant des structures résonantes diélectriques métalliques pour conformité à un taux d'absorption spécifique
US8816921B2 (en) 2011-04-27 2014-08-26 Blackberry Limited Multiple antenna assembly utilizing electro band gap isolation structures
US8786507B2 (en) 2011-04-27 2014-07-22 Blackberry Limited Antenna assembly utilizing metal-dielectric structures
EP2518824A1 (fr) * 2011-04-27 2012-10-31 Research In Motion Limited Ensemble formant antenne multiple utilisant des structures d'isolation à bande interdite électromagnétique
US8624788B2 (en) 2011-04-27 2014-01-07 Blackberry Limited Antenna assembly utilizing metal-dielectric resonant structures for specific absorption rate compliance
WO2013096867A1 (fr) * 2011-12-23 2013-06-27 Trustees Of Tufts College Système, méthode et appareil comprenant une antenne en spirale hybride
CN102593592A (zh) * 2012-02-29 2012-07-18 深圳光启创新技术有限公司 一种负磁导率超材料
CN103296464A (zh) * 2012-03-01 2013-09-11 深圳光启创新技术有限公司 一种负磁导率超材料及mri磁信号增强器件
GB2500719B (en) * 2012-03-30 2017-05-31 Medical Wireless Sensing Ltd Coupling electromagnetic radiation into a target
CN102683879B (zh) * 2012-04-28 2015-10-07 深圳光启创新技术有限公司 一种mri磁信号增强器件
WO2014109757A1 (fr) * 2013-01-11 2014-07-17 Mri Innovations Système et procédé de découplage de bobine de radiofréquence pour imagerie par résonance magnétique ayant une paroi magnétique modulaire
GB2523741A (en) 2014-02-26 2015-09-09 Medical Wireless Sensing Ltd Sensor
JP6169536B2 (ja) * 2014-06-06 2017-07-26 日本電信電話株式会社 メタマテリアル能動素子
US9767951B2 (en) * 2015-07-07 2017-09-19 The Boeing Company Liquid crystal inductor enhanced with magnetic nanoparticles
KR101700934B1 (ko) * 2015-12-31 2017-02-01 인천대학교 산학협력단 무선전력전송용 평면형 프랙탈 메타물질 공진기 및 에너지 집속 장치
FR3095084B1 (fr) * 2019-04-09 2021-10-01 Pgp Holding Dispositif electromagnetique
CN115224459B (zh) * 2021-04-16 2025-03-14 北京京东方技术开发有限公司 射频器件和天线装置

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US5223849A (en) * 1986-11-25 1993-06-29 Chomerics, Inc. Broadband electromagnetic energy absorber
US5621422A (en) * 1994-08-22 1997-04-15 Wang-Tripp Corporation Spiral-mode microstrip (SMM) antennas and associated methods for exciting, extracting and multiplexing the various spiral modes
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
US6091371A (en) * 1997-10-03 2000-07-18 Motorola, Inc. Electronic scanning reflector antenna and method for using same
US6088214A (en) * 1998-06-01 2000-07-11 Motorola, Inc. Voltage variable capacitor array and method of manufacture thereof
GB9900034D0 (en) * 1999-01-04 1999-02-24 Marconi Electronic Syst Ltd Structure with magnetic properties
GB2360094A (en) 2000-03-06 2001-09-12 Marconi Caswell Ltd RF screens for MRI

Also Published As

Publication number Publication date
KR20020086915A (ko) 2002-11-20
EP1279203A2 (fr) 2003-01-29
JP2003526423A (ja) 2003-09-09
GB2360132A (en) 2001-09-12
WO2001067549A3 (fr) 2002-05-02
WO2001067549A2 (fr) 2001-09-13
US20030146814A1 (en) 2003-08-07
CN1428017A (zh) 2003-07-02
GB0005356D0 (en) 2000-04-26
GB2360132B (en) 2002-04-24
US6801173B2 (en) 2004-10-05

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