Calculation of Electric Field of Very Low Frequency Antennas Based on Ring Simulation Charges - Boyu Ren; Xianqiang Li; Yuancheng Qin; Hao Du; Liangchang Fei; Rui Huang (23rd IEEE International Conference on Communication Technology, ICCT 2023, Wuxi, China, October 20-22, 2023, 2023)