Loading...
Please wait, while we are loading the content...
Similar Documents
A two-dimensional time domain near zone to far zone transformation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Beggs, John H. Kunz, Karl S. Luebbers, Raymond J. Ryan, Deirdre |
| Copyright Year | 1991 |
| Description | A time domain transformation useful for extrapolating three dimensional near zone finite difference time domain (FDTD) results to the far zone was presented. Here, the corresponding two dimensional transform is outlined. While the three dimensional transformation produced a physically observable far zone time domain field, this is not convenient to do directly in two dimensions, since a convolution would be required. However, a representative two dimensional far zone time domain result can be obtained directly. This result can then be transformed to the frequency domain using a Fast Fourier Transform, corrected with a simple multiplicative factor, and used, for example, to calculate the complex wideband scattering width of a target. If an actual time domain far zone result is required, it can be obtained by inverse Fourier transform of the final frequency domain result. |
| File Size | 607907 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920011430 |
| Archival Resource Key | ark:/13960/t0wq4w43m |
| Language | English |
| Publisher Date | 1991-05-01 |
| Access Restriction | Open |
| Subject Keyword | Communications And Radar Extrapolation Fourier Transformation Broadband Finite Difference Theory Scattering Far Fields Observation Targets Frequencies Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
