Experimental simulation of low level hybrid electromagnetic pulse (EMP) for vulnerable studies on electronic sytems and cables

Nuclear Electromagnetic Pulse (NEMP) or EMP is produced by high altitude nuclear burst. The EMP is a high intensity electromagnetic pulse having broad frequency spectrum covering from low frequencies to the VHF and UHF bands. EMP is still a serious threat to the electronic systems and communication systems. The laboratory simulation of EMP for test and harden the electronic systems becomes essential specially because same type of pulse can be generated and transmitted by the portable intentional high power electromagnetic (HPEM) sources apart from the nuclear burst. The different types of the EMP simulator like guided wave, vertically polarized dipole, horizontally polarized and hybrid EMP simulator [1] are used to test the electronics system. The hybrid EMP simulator is used to test the large systems like airborne systems. In this paper the design of the hybrid EMP simulator, D dot sensor[12][13] for measurement of pulse, has been presented along with the experimental results on the small hybrid EMP simulator in the laboratory. The computed and measurement results for radiated electric field in working volume is compared, field uniformity estimated and field variation at various angles at different distances studied.