Comparison of gasket transfer impedance and shielding effectiveness measurements - Part I

Several techniques are available to evaluate the shielding performance of various gasket materials and configurations. This work, in two Parts, measured the shielding performance of five gaskets using Transfer Impedance (TI) and Mode Stirred Chamber (MSC) techniques. Part I had two objectives: 1) to investigate the characteristics of a TI fixture from 50 MHz to 18 GHz; and, 2) to measure the transfer impedance of gaskets of varying materials, finishes, and configurations. Part I1 also had two objectives: 1) to measure the shielding effectiveness of the five gaskets using a MSC; and, 2) to compare the results obtained by the two shielding performance techniques.