The design of large antenna radome systems has relied on ray tracing and experimental methods due to a lack of dynamic electromagnetic analysis and computer codes. The prediction of radiation and scattering of these systems has always been encumbered by the complex nature and size of the radome itself. In order to gain a better understanding into the underlying effects of far-field pattern distortions, the near-field solution of antenna radome interactions must be viewed. The antenna can also be complex in design, have wide bandwidth operation, be electrically large in wavelengths, and have significant element-to-element and element-to-radome interactions. This paper presents a method for determining the RF performance from antenna radome configurations based on a frequency-domain finite element method. The application of this analysis on the design of antenna arrays in aircraft leading edges and radar radomes will be discussed. The modeled antenna array elements can be driven with arbitrary amplitude and phase weighting for sidelobe tapering and phased steering of the pattern. The understanding of near-field radiation and coupling interactions is an important design aid. Physical phenomena such as resonances are also observed in the predicted near-field results.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering