Research on simulation consistency between NEC and HFSS on strange antenna for evolving antenna

Evolutionary algorithm (EA) is a promising technology in automatic antenna design and it can invent new and strange antennas which are more effective than would otherwise be developed. However, a challenge in evolving antenna is that evaluating antenna fitness in the EA algorithm is usually time-consuming due to the time-consuming electromagnetic simulations. Numerical electromagnetics code (NEC) is a moment method solver with high computing speed and the code is publicly available for general use. It is then usually used to evaluate antenna fitness in evolving antenna. However, it does not go through a full reliability test yet, then it needs reliability test in simulating an antenna, especially a strange antenna before it is adopted to evolve antenna. This is the focus of this paper. And the reliability test is achieved by the simulation consistency between NEC and HFSS since HFSS is a commercial finite element method solver with high reliability. We find that NEC is reliable in simulating strange wire ...