{"ID":2829794,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2512.11444","arxiv_id":"2512.11444","title":"Point Target Near-Field Bistatic Imaging: Chirp-Based Aliasing Analysis","abstract":"This paper presents a chirp-based framework for characterising aliasing in a bistatic Near-Field (NF) imaging system equipped with multidimensional antenna arrays. Extending monostatic formulations, we derive closed-form expressions for the maximum spatial frequency, enabling the analytical derivations of the conditions for aliasing-free image reconstruction. The framework also provides a geometric interpretation of aliasing based on the antenna array geometry, target position, and antenna element spacing. Numerical results corroborate theoretical findings and show that the aliasing-free region enlarges with smaller antenna spacing, greater target range, lower array dimensionality, and smaller arrays. These results enable more effective design of bistatic NF imaging systems.","short_abstract":"This paper presents a chirp-based framework for characterising aliasing in a bistatic Near-Field (NF) imaging system equipped with multidimensional antenna arrays. Extending monostatic formulations, we derive closed-form expressions for the maximum spatial frequency, enabling the analytical derivations of the condition...","url_abs":"https://arxiv.org/abs/2512.11444","url_pdf":"https://arxiv.org/pdf/2512.11444v1","authors":"[\"Baptiste Sambon\",\"Gilles Monnoyer\",\"Claude Oestges\",\"Luc Vandendorpe\"]","published":"2025-12-12T10:30:08Z","proceeding":"eess.SP","tasks":"[\"eess.SP\"]","methods":"[]","has_code":false}