On the solution of a class of large body problems with partial circular symmetry (multiple asymmetries) by using a hybrid-dimensional finite-difference time-domain (FDTD) method
D. Arakaki et al., On the solution of a class of large body problems with partial circular symmetry (multiple asymmetries) by using a hybrid-dimensional finite-difference time-domain (FDTD) method, IEEE ANTENN, 49(3), 2001, pp. 354-360
This paper presents an efficient method to solve a large body scattering pr
oblem, viz. a paraboloid reflector antenna system, with only partial circul
ar symmetry, The asymmetry in the system is introduced by two factors, viz.
the microstrip feed and an inhomogeneous radome. The paper presents a nove
l approach, based on the equivalence and reciprocity principles and the "eq
uivalent" aperture theory, to overcome the asymmetry problem. The technique
thereby enables substantial computational efficiencies by analyzing the ma
jority of the three-dimensional (3-D) computational domain in an effective
two-dimensional (2-D) simulation, with the remainder being analyzed using a
3-D algorithm.