| 摘要 |
A module for receiving one or more electromagnetic waves moving along a p ath in a direction of propagation. The module includes a first electrically conductive strip disposed in a first pattern and a second substantially elec trically conductive strip disposed in a second pattern. The first and second strips are positioned substantially parallel to each other and spaced apart , and are electrically connected to each other. The first and second pattern s are substantially opposite to each other, so that current passing through the first and second strips generates respective electromagnetic fields whic h are substantially opposed to each other. The first strip is positionable i n the path of the electromagnetic wave and substantially transverse to the d irection of propagation, to provide a protected region from which said at le ast one electromagnetic wave is substantially excluded.
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