Sabzevari, Fatemeh Modares;
Winter, Robert SC;
Rambabu, Karumudi;
(2024)
A Modified Kirchhoff Migration for Microwave Imaging in Superluminal Propagation Region.
IEEE Transactions on Radar Systems
10.1109/trs.2024.3387950.
(In press).
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Abstract
Microwave imaging has been developed recently and is used in many applications. Kirchhoff’s migration technique is one of the most popular methods to recover the geometric info of any inaccessible target from raw data. The conventional Kirchhoff’s migration assumes a uniform propagation velocity in the far-field region of the transceiver, i.e., the antenna. In the near-field region of the antenna, the pulse propagation happens at a significantly greater speed compared to the farfield region. The propagation speed of the pulse depends on the antenna dimensions and varies as a function of the distance and angle of the antenna in a non-linear manner. This non-linearity causes non-focused images. In this work, a modified Kirchhoff’s migration method is proposed to take into account the nonuniformity of the propagation speed. Then, the proposed method is verified through several simulations and experiments and it is shown that the modified Kirchhoff’s migration results in focused images in the near-field region.
| Type: | Article |
|---|---|
| Title: | A Modified Kirchhoff Migration for Microwave Imaging in Superluminal Propagation Region |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/trs.2024.3387950 |
| Publisher version: | http://dx.doi.org/10.1109/trs.2024.3387950 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Near-field imaging, Kirchhoff’s migration, synthetic aperture radar (SAR), ultra-wideband (UWB) technology |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10191347 |
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