Title:
ELECTROMAGNETIC SHIELD SYSTEM CEILING
Document Type and Number:
Japanese Patent JPH04221153
Kind Code:
A
Abstract:
PURPOSE: To prevent the leak of electric wave even from a system ceiling in which the ceiling surface is finely divided.
CONSTITUTION: A ceiling bar 1 which is a module having the shorter length than the half cycle of the objective frequency so as to shield the electric wave free from leak. Accordingly, the gap formed between the ceiling bar 1 from which the electromagnetic wave leak is estimated and a ceiling plate is prevented from acting as antenna. Even in the case of a finely divided system ceiling, the leak of electric wave can be prevented.
Inventors:
NANBA YOSHIHIKO
Application Number:
JP40546490A
Publication Date:
August 11, 1992
Filing Date:
December 25, 1990
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
E04B1/92; E04B9/06; E04H9/14; H05K9/00; (IPC1-7): E04B1/92; E04B9/06; E04H9/14; H05K9/00
Attorney, Agent or Firm:
Ishida Chochichi (2 outside)