4.5GHz measurement of transition duration and frequency spectra due to small gap discharge as low voltage ESD

Very fast transition duration due to small gap discharge as the low voltage ESD was investigated in time and frequency domains. The characteristics of rising time of the transition duration were already cleared in 4.5 GHz bandwidth system. In this paper, the measurement system with a tapered coaxial electrode was improved for more high frequency. The insertion loss of a new coaxial electrode was within -3 dB in frequency range below about 6 GHz. As a consequence of the experiment using the new system, the voltage rise time was shown under 90 ps in discharging voltage of below 600 V. In addition, a relationship between maximum frequency range of the transients and discharging voltage were cleared by experiments in frequency domain using the 4.5 GHz system.