On the Radiation from Infinite Length Lossless Two Wire Transmission Lines

The electromagnetic radiation characteristics of infinite length, lossless two-wire transmission lines are investigated in this paper. Through rigorous analytical calculations, the absence of radiation perpendicular to the wire length in such configurations is demonstrated. The analysis reveals that Transverse Electromagnetic (TEM) wave propagation is exhibited in both single and parallel wire scenarios, with power flow confined exclusively along the wires. To support the analysis, the single-wire case is simulated using ANSYS HFSS, and the obtained results are compared with the derived analytical expressions. These findings are further validated through comparisons with established models, such as the coaxial cable and two-wire transmission lines with non-zero radius. A common misconception regarding radiation in ideal transmission line systems is clarified by this study, and a robust theoretical framework for understanding electromagnetic behavior in these structures is provided. The presented methodology offers a foundation for exploring more complex scenarios involving non-ideal transmission line configurations.

کلیدواژه ها:

Transmission line ، Electromagnetic Radiation ، Antennas ، Transverse Electromagnetic (TEM)