Development of the Shielding Materials Having the Highly Orientation Characteristics in the RF Magnetic Field
スポンサーリンク
概要
- 論文の詳細を見る
The conventional electromagnetic shielding technique is all but impossible to fundamental solution of the problems in the information and communication fields, such as virtual image for radar. Namely, it is necessary to receive a required electromagnetic wave as the information signal, and to shield a needless electromagnetic wave as the noise. the present research has developed the carbon, copper, ferrite, and BPSCCO plates, as the typical shielding material, having the orientation characteristics in the RF (radio frequency) magnetic field. To exhibit the orientation characteristics in the plane wave, it has formed the slit on the surface of typical shielding materials; termed the slit plate. For example, the value of RF magnetic shielding degree SDHP of slit carbon plate for holding the slit perpendicularly to the ground increased with frequency in the region from 1 MHz (7 dB) to 3 GHz (70 dB). And, the value of SDHH when holding the slit horizontally is indicated an average value of approximately 10 dB in this frequency region. That is, the difference values, SDHP-SDHH, indicated the orientation characteristics. Experimental results revealed several characteristics of the slit plates that include the influences of orientation characteristics on the slit length, slit width, and slit number. In the present paper, it was succeeded to improved the difference average value of approximately 35 dB for SDHP-SDHH, by the sandwich of slit ferrite plate over a slit carbon plate, in the civilian communication frequency region from 1 MHz to 3 GHz. In addition, important criteria are discussed for the design of an effective RF magnetic shielding plate having orientation characteristics.
論文 | ランダム
- 原田雅彦の「天才的失速」
- 1338 急性心筋梗塞の再灌流療法後にMRIで認められる心筋内低信号領域の意義とその心室壁拡張能への影響
- 1335 SPAMM Tagging法を用いた心室壁運動及び心筋Viabilityの評価についての検討 : 再灌流療法の効果について
- Thallium uptakeと左室壁運動との関係 : 再静注法による検討 : 日本循環器学会第63回中国・四国地方会
- 眼瞼下垂症における前頭筋吊り上げ術 (特集 眼瞼の退行性疾患に対する眼形成外科手術) -- (上眼瞼の退行性(加齢性)疾患)