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专利名称：STRUCTURE WITH SWITCHABLE MAGNETIC
PROPERTIES
发明人：WILTSHIRE, Michael Charles Keogh申请号：EP01908006.8申请日：20010306公开号：EP1279203A2公开日：20030129
摘要：A structure (40) with switchable magnetic properties comprises: a three-dimensional array of capacitive elements (44) in which each capacitive element (44)includes a low resistance conducting path and is such that a magnetic component (H) ofelectromagnetic radiation (12) lying within a predetermined frequency band induces anelectrical current (j) to flow around said path and through said associated element (44).The size of the elements (44) and their spacing (a) apart are selected such as to provide apredetermined permeability (ž) in response to said received electromagnetic radiation(12). Each capacitive element (44) comprises two concentric interleaved spiral conductingmembers or tracks (46, 48) which are electrically insulated from each other. A switchablepermittivity material, such as Barium Strontium Titanate (BST) or liquid crystal is providedbetween the tracks. The magnetic properties of the structure are switched by applying adc electrical potential difference between the conducting tracks.
申请人：Marconi Optical Components Limited
地址：One Bruton Street London WIJ 6AQ GB
国籍：GB
代理机构：Waters, Jeffrey
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