Narrow band filter
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United States of America Patent
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Nov 20, 2012
Grant Date -
N/A
app pub date -
Aug 12, 2010
filing date -
Aug 12, 2010
priority date (Note) -
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Abstract
A unit cell of a narrow band filter is provided. The unit cell includes a matrix body having a first permittivity and an inclusion body having a second permittivity and disposed in the matrix body. The matrix body and the inclusion body are configured to reflect electromagnetic radiation incident on electromagnetic radiation facing surfaces of the matrix body and the inclusion body. A bandwidth of the reflected electromagnetic radiation is based on a difference between the first permittivity and a third permittivity, which is an average permittivity between the first permittivity and the second permittivity based on volumes of the inclusion body and a portion of the matrix body. The inclusion body is configured such that the second permittivity is adjustable to adjust the third permittivity, thereby adjusting the difference between the first permittivity and the third permittivity. A narrow band filter and a method are also disclosed.
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