AI Article Synopsis
- * An analytical factor is included to correct the near-field measurements by comparing them to far-field data, addressing diffraction at angles over 20°.
- * The proposed method successfully minimizes multipath effects and isolates target reflections using distance averaging and a time-gating process, proving effective with a rectangular metallic plate and potentially applicable to other target shapes.
Article Abstract
The single-antenna technique proposed in this paper was developed for measuring the radar cross-section at near-field distances in a real environment, from reflection coefficient measurements on the antenna. The near-field radar cross-section is corrected with an analytical factor calculated as a ratio between the radar cross-section computed at far-field and near-field. The analytical correction factor takes into account the effects of the diffraction at the edges of the target at incidence angles higher than 20°. An improved, distance averaging technique is proposed to reduce the multipath propagation effects. A time-gating procedure is additionally used in order to better isolate the reflection from the target and to remove the real environment contributions. The method was successfully tested on a rectangular metallic plate as a target over a wide frequency band, at normal and oblique incidence angles; however, it might also work for arbitrarily shaped targets, because they can actually be divided into small rectangular patches.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9570673 | PMC |
| http://dx.doi.org/10.3390/s22197453 | DOI Listing |
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