MEASURING OF THE SHIELDING EFFECTIVENESS OF THE OUTER CONDUCTOR OF COAXIAL CABLES

For Measurements of the shielding effectiveness of the outer conductor of coaxial cables a simple but reliable method is to be selected. The methods found in the literature are briefly characterized and three appropriate ways, (1) the determination of the transimpedance from surface current of the shield and voltage inside the cable up to 30 MHz, (2) the "wire injection" method with coupled lines applied from 0.1 to 1000 MHz, and (3) the measurement of thc shield surface current using a high-frequency clamp-on current probe in the range between 1 and 500 MHz, have been chosen and tested.