Performance Evaluation of a Half-Wave Resonant Slot Antenna Over Perfect Ground Using NEC (Numerical Electromagnetic Code)

摘要

Present and future trends in shipboard antenna designs have as an objective, antennas which are or will be survivable in combat environments, integrable in ship's superstructures, low in profile and compact. This thesis investigates the performance characteristics of a 7 by 0.2 meter slot antenna, which is cut into a rectangular bulkhead, the bulkhead being a section of the superstructure of an average ship. This slot antenna was modeled using the Numerical Electromagnetic Code. Input impedances, radiation patterns and near fields inside the slot are presented. The reason for conducting this performance evaluation is to determine if this approach to survivable antennas is feasible enough to be implemented in future ship designs.