球形チャンバーを用いた導電性材料のシールド効果測定 : プローブアンテナの入力インピーダンス変化について : 無線・光伝送

抄録

Recently, many conducting plastic shielding materials have been retailed in connection with environmental electromagnetic problems. We formerly proposed a method of measuring the shielding effectiveness using a spherical cell as a means of evaluating shielding effectiveness. In this paper, the deviation effect of the input impedance of the probe antenna is investigated in connection with the shield effectiveness. The input impedance of the probe antenna is changed from the inherent value when the antenna covered by a lossy material cap.