Research on Resonant Frequency of Reradiation Interference from Power Transmission Lines at 1.7MHz-3MHz Based on Characteristic Modes

In the 1.7MHz~3MHz frequency band, aiming at the shortcomings of the existing methods in the research of reradiation interference resonance of transmission lines, this paper proposes a method for analyzing the resonance frequency of reradiation interference of transmission lines based on the characteristic mode theory. Based on the idea of mode decomposition, the formation mechanism of reradiation interference resonance is explained from the perspective of electromagnetic energy. The case analysis shows that, compared with the existing research results, the method in this paper does not depend on the space field strength, and has completeness and clear physical meaning.