John Company

AAWSAP DIRD, Invisibility Cloaking Theory and Experiments, March 2010

DOW-UAP-D122 · page 26 of 29

Page 26 of 29 of DOW-UAP-D122

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UNCLASSIFIED/ /FOR: errl@IAL YSIE 8HLY
coordinate transformations). This is not a cloaking device: it compresses an extended
region of space to a reflecting plate; the interior is hidden behind the plate, but the
plate is clearly visible. Such a device conceals the extension and shape of the hidden
region but not the fact of hiding itself.
B
Figure 22. Coordinate Transformation Implemented by a Ground-Plate Cloak
In order to implement the ground-plate cloak, thousands of cells with split-ring
resonators with individual, tailor-made electromagnetic properties were designed, as
Figure 23 shows.
0.
0.8
12
6
mm)
Figure 23. Implementation of the Ground-Plate Cloak38
UNCLASSIFIED//EOR QFFIEIAk WS& 8HLY
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