Title:
【発明の名称】切替可能な磁気特性を有する構造
Document Type and Number:
Japanese Patent JP2003526423
Kind Code:
A
Abstract:
A structure (40) with switchable magnetic properties comprises: an 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) of electromagnetic radiation (12) lying within a predetermined frequency band induces an electrical current (j) to flow around said path and through said associated element (44). The size of the elements (44) and their spacing (alpha) apart are selected such as to provide a predetermined permeability (mu) in response to said received electromagnetic radiation (12). Each capacitive element (44) comprises a plurality of stacked planar sections (42) each or which comprises at least two concentric spiral conducting members or tracks (46, 48) which are electrically insulated from each other. A switchable permittivity material, such as Barium Strontium Titanate (BST) is provided between the tracks. The magnetic properties of the structure are switched by applying a dc electrical potential between the conducting tracks.
Inventors:
Wiltshire Michael Charles Keow
Application Number:
JP2001566217A
Publication Date:
September 09, 2003
Filing Date:
March 06, 2001
Export Citation:
Assignee:
Marconi Optical Components Limited
International Classes:
G01R33/422; A61B5/055; G01R33/3415; H01Q3/44; H01Q15/00; H01Q15/14; H05K9/00; (IPC1-7): A61B5/055; G01R33/3415; G01R33/422; H01Q3/44; H01Q15/14; H05K9/00
Attorney, Agent or Firm:
Minoru Nakamura (9 outside)