A Simultaneous Time-Domain Measurement Method for Electric and Magnetic Fields Within the Test Chamber of Radiated Immunity

This article presents a novel time-domain method for simultaneously characterizing electric and magnetic fields of test chambers in integrated circuit radiation immunity tests. The proposed approach is based on a symmetric vertical crossed-loop antenna (SCLA) and involves both a frequency-domain calibration process and a time-domain reconstruction process. Unlike the traditional single electric or magnetic field antenna characterization methods in IEC 62132-8, this method can simultaneously induce all three fields required during the radiation immunity test, namely, <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$H_{\mathrm { x}}$ </tex-math></inline-formula>, <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$H_{\mathrm { y}}$ </tex-math></inline-formula>, and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$E_{\mathrm { z}}$ </tex-math></inline-formula>. The frequency-domain calibration process decouples the original induced E-field and H-field signals from the aliased measurement port voltage signals. The time-domain reconstruction process rebuilds the time-domain waveforms of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$H_{\mathrm { x}}$ </tex-math></inline-formula>, <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$H_{\mathrm { y}}$ </tex-math></inline-formula>, and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$E_{\mathrm { z}}$ </tex-math></inline-formula> from the original induced E-field and H-field signals. The calibration effectiveness, accuracy, robustness, and frequency range of the proposed method are analyzed and discussed. Finally, three typical electromagnetic field waveforms, including a sinusoidal signal, a pulse-modulated sinusoidal signal, and a double-exponential strong pulse signal, are used to demonstrate the effectiveness of the proposed method.