Norm detection and application for its electromagnetic pulse study

Electromagnetic norm, as a powerful tool for the analysis the waveform characteristics, has been included in several international standards for the study of effects mechanism and evaluation. In this paper the physical meanings of different kinds of norms are discussed. A norm detector for the E-field measurement and norms calculation has been developed based on high-speed data acquisition and FPGA technology. The measured signal can be digitized and stored by the norm detector and then copied to the computer rather than transmitted by fiber optic link or cables to the remote area. The sampling rate of the norm detector is 1 GHz or 2 GHz and the storage depth of 4 kB can be extendable. The processing code was developed for the waveform display and the calculation of the commonly used norms in the computer. The norm detector is suitable for the measurement of the coupled field inside small enclosures or cavities. Moreover, the electromagnetic norms calculated by the code can be used to determine the sensitive parameters of the effects, evaluate the influence level, limit the upper or lower bounds of the response and locate the electromagnetic radiation based on time reversal method, etc.