Dual-Frequency Electromagnetic Sensor for Nondestructive Evaluation of "Insulator-Conductor" Hybrid Structures. - Mingrui Zhao; Xiaokang Yin 001; Martin Mwelango; Guangqiang Rong; Pengcheng Ma; Jiaxing Huang; Xin'an Yuan; Wei Li 072 (IEEE Trans. Ind. Electron., 2025)