Abstract
A domain decomposition method for analyzing very large FDTD domains, tens of thousands of wavelengths long, is demonstrated by application to the problem of RADAR scattering in the maritime environment. Success depends on the elimination of artificial scattering from the “sky” boundary which is ensured by an ultra-high performance absorbing termination that eliminates this reflection at angles of incidence less than 0.03 degrees off grazing. The results are cross-validated against a parabolic equation (PE) method and surface integral equation method on a 1.7km sea surface problem, and to a PE method on propagation through an inhomogeneous atmosphere in a 4kmlong space, both at X-band. Further comparisons are made against boundary integral equation and PE methods from the literature in a 3.6km space containing an inhomogeneous atmosphere above a flat sea at S-band. Details of the method are given for the twodimensional problem (2D). Application to three-dimensions (3D) is demonstrated by comparing the 2D solution to the 3D solution of a sea-corridor 1.3m wide, 2.25m tall, by 110m long.
| Original language | English (US) |
|---|---|
| Journal | IEEE Transactions on Antennas and Propagation |
| DOIs | |
| State | Accepted/In press - Jun 29 2018 |
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Keywords
- domain decomposition
- FDTD
- RADAR scattering
- rough surface scattering
- true grazing absorbing boundaries
ASJC Scopus subject areas
- Electrical and Electronic Engineering
Cite this
FDTD Simulation of Very Large Domains Applied to Radar Propagation over the Ocean. / Dowd, Brandon W.; Diaz, Rodolfo.
In: IEEE Transactions on Antennas and Propagation, 29.06.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - FDTD Simulation of Very Large Domains Applied to Radar Propagation over the Ocean
AU - Dowd, Brandon W.
AU - Diaz, Rodolfo
PY - 2018/6/29
Y1 - 2018/6/29
N2 - A domain decomposition method for analyzing very large FDTD domains, tens of thousands of wavelengths long, is demonstrated by application to the problem of RADAR scattering in the maritime environment. Success depends on the elimination of artificial scattering from the “sky” boundary which is ensured by an ultra-high performance absorbing termination that eliminates this reflection at angles of incidence less than 0.03 degrees off grazing. The results are cross-validated against a parabolic equation (PE) method and surface integral equation method on a 1.7km sea surface problem, and to a PE method on propagation through an inhomogeneous atmosphere in a 4kmlong space, both at X-band. Further comparisons are made against boundary integral equation and PE methods from the literature in a 3.6km space containing an inhomogeneous atmosphere above a flat sea at S-band. Details of the method are given for the twodimensional problem (2D). Application to three-dimensions (3D) is demonstrated by comparing the 2D solution to the 3D solution of a sea-corridor 1.3m wide, 2.25m tall, by 110m long.
AB - A domain decomposition method for analyzing very large FDTD domains, tens of thousands of wavelengths long, is demonstrated by application to the problem of RADAR scattering in the maritime environment. Success depends on the elimination of artificial scattering from the “sky” boundary which is ensured by an ultra-high performance absorbing termination that eliminates this reflection at angles of incidence less than 0.03 degrees off grazing. The results are cross-validated against a parabolic equation (PE) method and surface integral equation method on a 1.7km sea surface problem, and to a PE method on propagation through an inhomogeneous atmosphere in a 4kmlong space, both at X-band. Further comparisons are made against boundary integral equation and PE methods from the literature in a 3.6km space containing an inhomogeneous atmosphere above a flat sea at S-band. Details of the method are given for the twodimensional problem (2D). Application to three-dimensions (3D) is demonstrated by comparing the 2D solution to the 3D solution of a sea-corridor 1.3m wide, 2.25m tall, by 110m long.
KW - domain decomposition
KW - FDTD
KW - RADAR scattering
KW - rough surface scattering
KW - true grazing absorbing boundaries
UR - http://www.scopus.com/inward/record.url?scp=85049317903&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049317903&partnerID=8YFLogxK
U2 - 10.1109/TAP.2018.2852141
DO - 10.1109/TAP.2018.2852141
M3 - Article
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
SN - 0018-926X
ER -