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Abstract In this article, a new differential magnetic‐field probe with high detection sensitivity for near‐field scanning is proposed. The proposed probe consists of a U‐shaped differential loop as a driven element, a pair of asymmetric inverted U‐shaped differential loops as a parasitic element, two transmission line, two connected vias, two shorted vias, and two output ports. Connected and shorted vias are used to form the sensing structure with high sensitivity. Some shield vias are used to reject the unwanted electric–field coupling. The proposed probe is simulated, fabricated, and measured to demonstrate the design rationality. The measured results reveal that the presented probe has a higher detection sensitivity and a high electric‐field suppression ratio greater than −35 dB in the range of 0.01 to 20 GHz.
Nie et al. (Tue,) studied this question.
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