H.-Y. . Gan, W.-S. . Zhao, D.-W. . Wang, J. . Wang, Q. . Liu, and G. . Wang, “High-Q Active Microwave Sensor Based on Microstrip Complementary Split-Ring Resonator (MCSRR) Structure for Dielectric Characterization”, ACES Journal, vol. 36, no. 07, pp. 922–927, Oct. 2021.