Eliminating ghost phantoms in computational microwave imaging by breaking receiver symmetry

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper addresses the challenge of eliminating ghost phantoms in frequency-diverse computational microwave imaging (CMI) by optimizing the arrangement of receiving antennas. Ghost phantoms, usually refer to unreal objects that appear in reconstructed images, can cause significant challenges. These ghost phantoms are primarily attributed to factors such as system inaccuracies, deficiencies in signal processing and the intricate electromagnetic phenomena present in the environment. Traditional approaches to address this issue in CMI focus on enhancing signal processing algorithms or increasing the diversity of measurement modes. In this work, we present that the intrinsic symmetry in the arrangement of transmitter (Tx) and receiver (Rx) components of a CMI system also substantially contributes to the occurrence of these ghost phantoms in reconstructions. We propose a solution by breaking the symmetry in the Rx configuration to reduce the ghost phantom occurrence in the reconstructed images. We use full-wave simulations to investigate the effects of three different receiver arrangement schemes on image reconstruction: uniform, half-uniform and half-irregular, and fully irregular. The results demonstrate that breaking the symmetry of the Rx elements, particularly by adopting an irregular arrangement, significantly improves the quality of the reconstructed images.

Original languageEnglish
Title of host publicationProceedings of the 19th European Conference on Antennas and Propagation, EuCAP 2025
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
Publication statusAccepted - 31 Dec 2024
Event19th European Conference on Antennas and Propagation 2025 - Stockholm, Sweden
Duration: 30 Mar 202504 Apr 2025
https://eucap.org/

Publication series

NameEuCAP Proceedings
ISSN (Print)2164-3342

Conference

Conference19th European Conference on Antennas and Propagation 2025
Abbreviated titleEuCAP 2025
Country/TerritorySweden
CityStockholm
Period30/03/202504/04/2025
Internet address

Keywords

  • metasurface antenna
  • computational microwave imaging
  • ghost eliminating

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