Electromagnetic analysis for vehicle antenna development using method of auxiliary sources

Previously, the electromagnetic analysis of large semi-open structures, like vehicles, was presented, formulated as a scattering problem, illuminated by a wide range of incident EM fields (Zaridze, R. et al., Proc. 2003 IEEE Int. Antennas and Propag. Symp./USNC/CNC/URSI North American Radio Science Meeting, 2003). The effect of resonances within the semi-open structure on the RCS, near fields and pattern of reradiated fields was shown. We now consider the interaction of the entire semi-open structure on the performance of an antenna together with an investigation of near field distributions inside the cavity. The method of auxiliary sources (MAS) (Zaridze et al., IEEE Trans. Antennas and Propag., vol.50, no.1, p.50-8, 2002) is utilized. The results for a simple geometry are compared to measurements.