ELECTROMAGNETIC WAVE SHIELD STRUCTURE

• Main Authors: SASAKI HIROYUKI, OKABE TETSUO
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS; SEMICONDUCTOR DEVICES

To provide an electromagnetic wave shield structure that further improves the shielding performance at a joint of shield members and a penetration of a pipe or the like against high-frequency electromagnetic waves exceeding 1 GHz compared with the conventional method.SOLUTION: A brass through tube 2 for inserting an optical cable 3 penetrates a shield member 1 and is fixed. The through tube 2 is curved, and the dimension is such that the inner diameter of the tube is 1/2 wavelength or less of the electromagnetic wave to be shielded and the length is 6 times or more the inner diameter of the tube, and a tubular absorber 4 is continuously attached to the end of the through tube 2 on the indoor side, and the optical cable 3 is inserted therethrough.SELECTED DRAWING: Figure 2 【課題】１GHz超の高周波電磁波に対して、シールド部材の接合部や配管等の貫通部などにおけるシールド性能を、従来の方法から更に向上させる電磁波シールド構造を提供する。【解決手段】光ケーブル３を挿通するための真鍮製の貫通管２がシールド部材１を貫通して固定されている。貫通管２は湾曲しており、その寸法は、管内径が遮蔽対象とする電磁波の1/2波長以下、長さが管内径の６倍以上であり、貫通管２の室内側管端部に連続して筒状の吸収体４が取付けられ、光ケーブル３が挿通されている。【選択図】図２