High power radiators and E-field sensors for sub-nanosecond electromagnetic pulses

Abstract

Paper describes the results and problems around creation and diagnostics both the high power radiators and the E-field strip-line sensors of the directional wave coupler type. They were used in technique of short electromagnetic pulsed (EMP) waves with ultra-wideband (UWB) frequency spectrum (0.1 GHz −10 GHz) and high pulsed power. The E-field strip-line antenna sensors connected to digital oscilloscopes were used to measure the pulsed electromagnetic transverse (TEM) travelingwaves. The high power pulsed radiators were constructed with the UWB radiation antennas of a TEM-horn type and the pulsed high power semiconductor generators (“FID Technology” comp). It was made models of compact autonomous radiators with the generators for 10–100 kV pulsed voltages and 1–100 kHz repetition rate pulses with control synchronizing. New E-field sensor of non-symmetrical two-wire type has dielectric stalk with high e=16 and small cross-section. Sensors were tested experimentally by using the compact line-cell with TEM waves. The test results were the 0.32 V/(kV/m) E-field sensitivity, 0.03 ns rise-time and up to 7 ns pulse duration without signal distortions. The results were in good accordance with the computer simulation by electromagnetic 3-D code “KARAT”. The EMP radiation with the E(t)-field amplitudes of levels 10 kV/m can be successfully used to examine various electronic devices on electromagnetic compatibility (EMC).