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Patent Searching and Data


Title:
ELECTROMAGNETIC SHIELD FILM
Document Type and Number:
Japanese Patent JP2003258543
Kind Code:
A
Abstract:

To provide an electromagnetic shield film for reducing a transmissivity of an electromagnetic wave with a particular frequency.

The electromagnetic shield film 1 is configured with a thin metallic or plastic film 2 having conductivity to which slits 3 are formed. The slits 3 are formed in multi-stages and in many columns longitudinally and laterally. By forming the slits 3, a horizontally polarized wave passes through and a vertically polarized wave is shut off. That is, the slits 3 can select a polarized wave to be passed. Moreover, a length L of each slit 3 is selected to be a length for shutting off an electromagnetic wave with a resonance frequency among passed electromagnetic waves (horizontally polarized wave).


Inventors:
Kajiwara, Akira
Application Number:
JP2002000056943
Publication Date:
September 12, 2003
Filing Date:
March 04, 2002
Export Citation:
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Assignee:
SHIMIZU CORP
International Classes:
E04B1/92; H01Q1/52; H01Q17/00; H05K9/00; (IPC1-7): H01Q17/00; E04B1/92; H01Q1/52; H05K9/00