Cylindrical MIMO Array-Based Near-Field Microwave Imaging

Shiyong Li*, Shuoguang Wang, Qiang An, Guoqiang Zhao, Houjun Sun

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Microwave/millimeter-wave imaging has a wide prospect in applications of concealed weapons detection. The main problem of the existing techniques lies in the contradiction between the imaging speed and the system cost. In this respect, a cylindrical sparse multiple-input-multiple-output (MIMO) array topology is proposed, which has no mechanical scanning so as to achieve fast sampling process. Furthermore, it can provide more angular observations than the mainly used systems with a planar aperture. To speed up the image reconstruction process, a phase center approximation-based transformation is made to convert the multistatic sampling scheme to its monostatic counterpart for which there are more fast and tractable imaging algorithms. Then, a phase calibration method is presented after we analyze the error of such an equivalence. In so doing, the cylindrical MIMO topology is transformed into an approximate monostatic one. Finally, a wavenumber domain algorithm is employed to attain the fast image reconstruction. Numerical simulations are provided to demonstrate the performance improvement of the proposed technique.

Original languageEnglish
Article number9119193
Pages (from-to)612-617
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Volume69
Issue number1
DOIs
Publication statusPublished - Jan 2021

Keywords

  • Microwave imaging
  • monostatic
  • multiple-input-multiple-output (MIMO) array
  • multistatic
  • wavenumber domain algorithm

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