A hybrid algorithm that combines the finite-element time-domain (FETD) method and generalized scattering matrix (GSM) technique is proposed to efficiently compute the broadband monostatic radar cross section (RCS) of a large and deep open cavity. The formulation and implementation for the numerical modal analysis of arbitrary cross sections and the FETD method equipped with complex frequency-shifted perfectly matched layers for transient simulations are presented. The broadband monostatic RCS is evaluated using a broadband GSM obtained by the FETD solutions. Several examples are presented to demonstrate the accuracy and efficiency of the proposed hybrid FETD-GSM algorithm for broadband monostatic RCS computation and inverse synthetic aperture radar imagery of large and deep open cavities.
- Cavity scattering
- complex frequency-shifted perfectly matched layers (CFS-PML)
- finite-element time-domain (FETD) method
- generalized scattering matrix (GSM)
- inverse synthetic aperture radar (ISAR)
ASJC Scopus subject areas
- Electrical and Electronic Engineering