Moment Method for Solving Electric Field Integral Equations to Determine Linear Antenna Surface Current Distribution

This paper introduces the fundamental principles and applications of the Moment Method (MoM), focusing on how to solve electric field integral equations using MoM to determine surface current distribution, radiation patterns, and input impedance of linear antennas. Through detailed analysis and derivation, we can better understand the importance and practical applications of MoM in antenna engineering. The implementation typically involves discretizing the antenna structure into segments, converting integral equations into matrix equations using basis functions and testing procedures, and solving the resulting linear system using techniques like LU decomposition or iterative methods. Additionally, the paper discusses the advantages and limitations of the Moment Method, including its high accuracy for wire antennas but computational intensity for complex structures. Potential improvements and extensions are proposed to better meet the requirements of different application scenarios, such as incorporating adaptive mesh refinement or hybrid methods combining MoM with other numerical techniques. This work aims to provide valuable references and inspiration for researchers and engineers in related fields, with practical code implementation considerations including proper choice of basis functions, efficient matrix filling algorithms, and impedance matrix solution strategies for optimal performance.