Abstract
An algorithm for the fast computation of the physical optics (PO) integral describing single bounce back scattering in near-field scenarios is presented. The algorithm is based on a multilevel computation of partial contributions to the PO integral by hierarchically ordered subdomains. Phase- and amplitude-compensation of the partial contributions allows for their coarse sampling over non-uniform spherical grids. The solution is obtained by gradual aggregation of such partial contributions via interpolation on progressively denser grids. The computational complexity is further reduced by representation of small subdomains' contributions via their far-field patterns and transition to the near-field representations only at a higher level. Speed-up, accuracy, and error controllability are demonstrated.
| Original language | English |
|---|---|
| Article number | 6824208 |
| Pages (from-to) | 4325-4335 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 62 |
| Issue number | 8 |
| DOIs | |
| State | Published - 1 Jan 2014 |
| Externally published | Yes |
Keywords
- High-frequency
- multilevel algorithms
- numerical methods
- physical optics (PO)
- scattering
ASJC Scopus subject areas
- Electrical and Electronic Engineering