Transfer impedance and effectiveness of SMA receptacle for wideband measurement of discharge current due to human ESD |
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Authors: | Yoshinori Taka Yoshihisa Kagawa Osamu Fujiwara |
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Institution: | Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya-shi 466-8555, Japan |
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Abstract: | In order to investigate the effectiveness of an SMA receptacle as wideband measurement electrode for human ESD, we derived the transfer impedance of a 50-Ω SMA receptacle, and measured its frequency characteristics from 300 kHz to 20 GHz. With a 12-GHz digital oscilloscope, measurement of discharge currents through a hand-held metal bar from a charged human was made, and thereby the injected currents on the SMA receptacle were reconstructed from the measured transfer impedance. The results show that at a charge voltage of 1500 V the reconstructed current waveform agrees well with the observed voltage waveform divided by 50 Ω. |
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