Application of Electromagnetic Simulations for Antenna Analysis

Recently electromagnetic (EM) simulations become very reliable and are conveniently used for antenna design, analysis and evaluation. Especially, the ability of visualization of physical appearances of electromagnetic performance at antennas is useful. In this paper, firstly overview EM simulators. Next, check point for obtaining correct simulation results of antenna performances are summarized. As a main part, effects of visualization are shown. Examples such as derivation of new structural equations at small wire antennas, analysis of lens antennas having positive and negative refractive index, reflector antenna performance and under water radio propagation are shown. Additionally, high speed calculation method for radar cross section calculation is shown.