A hybrid technique combining the shooting-andbouncing-ray (SBR) method and the method-of-moments (MoM) is presented for analyzing scattering by large conducting bodies having small protrusions. In this technique, the MoM with an approximate Green's function is used to characterize the small protrusions, yielding an admittance matrix, which, when multiplied with the incident field on the protrusions, yields the currents induced on the protrusions. The incident field in the presence of the large bodies is calculated using the SBR method. The field radiated by the currents on the protrusions is also calculated using the SBR method with the aid of reciprocity. Furthermore, an iterative approach is developed, which can reduce the error introduced by the use of the approximate Green's function. Numerical results are given to demonstrate the accuracy and capability of the hybrid technique.
|Number of pages||9|
|Journal||IEEE Transactions on Antennas and Propagation|
|State||Published - 1998|
Bibliographical noteFunding Information:
Manuscript received September 30, 1997; revised June 12, 1998. This work was supported by a grant from AFOSR MURI under Contract F49620-96-1-0025, the National Science Foundation under Grant NSF ECE 94-57735, and the Office of Naval Research under Grant N00014-95-1-0848.
- Electromagnetic scattering
- Geometrical theory of diffraction
- Moment methods
ASJC Scopus subject areas
- Electrical and Electronic Engineering