Paving material for absorbing electromagnetic wave and pavement structure using it
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United States of America Patent
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Jan 9, 2007
Grant Date -
Jan 20, 2005
app pub date -
Sep 28, 2001
filing date -
Sep 28, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electromagnetic absorber formed of conductive fiber or the like, such as carbon fiber having an overall length corresponding to the wavelength of electromagnetic waves to be absorbed, is mixed into a base material to form an electromagnetic wave-absorbing pavement material. The electromagnetic wave-absorbing pavement material is used to form a pavement having an electromagnetic wave absorbing course. Further, an electromagnetic wave reflecting course is disposed under the electromagnetic wave absorbing course, and the electric length of the electromagnetic wave reflecting course is set to a predetermined value in relation to the dielectric constant so that electromagnetic waves reflecting off the surface of the electromagnetic wave absorbing course and electromagnetic waves reflecting off the electromagnetic wave reflecting course have opposite phases and thereby cancel each other out, whereby the electromagnetic waves are absorbed well.
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Cited Art Landscape
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