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International Journal of Antennas and Propagation
Volume 2014, Article ID 143068, 13 pages
Research Article

Research on Wideband Differential-Mode Current Injection Testing Technique Based on Directional Coupling Device

National Key Laboratory of Electromagnetic Environment Effects, Mechanical Engineering College, Heping West Road, Shijiazhuang 050003, China

Received 7 April 2014; Accepted 23 June 2014; Published 15 July 2014

Academic Editor: Wenhua Yu

Copyright © 2014 Xiaodong Pan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents a new kind of differential-mode current injection test method. The equal response voltage on the cable or the antenna port of the equipment under test (EUT) is regarded as equivalent principle for radiation and injection test. The injection and radiation response analysis model and the injection voltage source extrapolation model in high intensity radiated field are established. The conditions of using differential-mode current injection as a substitute for radiation are confirmed. On the basis of the theoretical analysis, the function and structure design scheme of the directional coupling device is proposed. The implementation techniques for the single differential-mode current injection method (SDMCI) and the double differential-mode current injection method (DDMCI) are discussed in detail. The typical nonlinear response interconnected systems are selected as the EUT. The test results verify the validity of the SDMCI and DDMCI test methods.