Structure with magnetic properties
AssigneeMarconi Caswell Limited
InventorsAnthony J Holden, Michael C Wiltshire, David J Robbins, William J Stewart, John B Pendry
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Abstract
A structure which exhibits magnetic properties when it receives electromagnetic radiation is formed from an array of capacitive elements each of which is smaller, and preferably much smaller, than the wavelength of the radiation. Each capacitive element has a low resistance conducting path associated with it and is such that a magnetic component of the received electromagnetic radiation induces an electrical current to flow around the path and through the associated element. The creation of internal magnetic fields generated by the flow of the induced electrical current gives rise to the structure's magnetic properties.
Claims14
A structure with magnetic properties upon receiving electromagnetic radiation, comprising:
- an array or capacitive elements, each capacitive element including a low resistance conducting path, and being such that a magnetic component of received electromagnetic radiation lying within a predetermined frequency band induces an electrical current to flow around the path and through the associated element, and the elements having a size and a spacing apart from one another are selected such as to provide a negative magnetic permeability over a selected frequency range in response to the received electromagnetic radiation.
Dependencies are inferred from the claim text.