A computer-aided design technique for EMC analysis

This paper presents the results of an electromagnetic compatibility (EMC) analysis of an HF communication antenna system on a US Navy ship using computer-aided design tools and engineering workstations. Shipboard EMC computer modeling techniques are addressed. Geometry representation of the Navy ship in a method of moments (MoM) wire grid model is extracted from a 3-D solid drawing. The geometry and segmentation pre-processing checks of the wire grid model are color-coded by the Numerical Electromagnetic Engineering Design System (NEEDS 3.0). Antenna performances are predicted by the Numerical Electromagnetic Code (NEC4). The predicted antenna performance results are post-processed by NEEDS 3.0, which provides two- and three-dimensional plots for visualization. Co-site EMC analysis of the HF communication system is determined by the Communication Engineering Design System (COEDS 2.0) running the Cosite Analysis Model (COSAM 3.0).