Title :
Shielding efficiency measurements under pulsed electromagnetic fields
Author :
Venkateswarlu, V. ; RAo, Y. Narayana
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Madras, India
Abstract :
The paper describes a method of using the transfer function of a given system to calculate the shielding efficiency (SE) of a protective screen with the help of measurements conducted in the time domain. A high voltage electromagnetic pulse simulator (EMPS) creates the required pulse fields. The radiated field in the working zone of the simulator is measured by a V-conical sensor. Evaluation of the shielding efficiency in the frequency domain is carried out by deconvoluting the measured electric field applying fast Fourier transform (FFT) techniques. Different materials are compared for their SE over a wide frequency range from 0 to 100 MHz, which is the spectrum of the generated impulse
Keywords :
digital simulation; electric field measurement; electric sensing devices; electromagnetic fields; electromagnetic pulse; fast Fourier transforms; frequency-domain analysis; simulation; time-domain analysis; transfer functions; 0 to 100 MHz; FFT; V-conical sensor; electric field measurement; fast Fourier transform; frequency domain; frequency range; high voltage electromagnetic pulse simulator; materials; protective screen; pulse fields; pulsed electromagnetic fields; radiated field; shielding efficiency measurements; time domain measurements; transfer function; EMP radiation effects; Electromagnetic measurements; Electromagnetic radiation; Electromagnetic shielding; Frequency domain analysis; Protection; Pulse measurements; Time measurement; Transfer functions; Voltage;
Conference_Titel :
Electromagnetic Interference and Compatibility, 1995., International Conference on
Conference_Location :
Madras
Print_ISBN :
0-7803-3229-6
DOI :
10.1109/ICEMIC.1995.501577
