電磁シールド面に設けた開口のシールド性能に関する研究(その1) : 単一方形開口のシールド性能に関する実験  [in Japanese] RESARCH IN REGARD, TO THE SHIELDING EFFECTIVENESS OF RECTANGULAR OPENINGS IN ELECTROMAGNETIC SHIELDING ENCLOSURE (NO. 1) : Experiments on shileding effectiveness with single opening of different sizes  [in Japanese]

This study reports on experiments aiming at prediction of shielding effectiveness of a square opening. A square opening was made in the center of a sheetof .electrolytic copper leaf,and shielding effectiveness was measured while varying the length of each side of the opening.The results indicate that shielding effectiveness is described by a logarithmic function of the length of the sides. A further experiment elucidated the shielding effectiveness when an opening is made at any location fora transmitting/receiving antenna. The relationship between shielding effectiveness and the distance fromopening center to antenna center was clarified.