Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 22, Issue 7, Pages 1657-1661Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2023.3257709
Keywords
Coupling medium; near-field antenna; quad-band antenna; quantitative microwave imaging; reverberating chamber; shielded cavity; tapered patch antenna array
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This paper presents a new quad-band tapered patch transmit-receive antenna array designed for a multistatic microwave imaging cavity system. The reverberating cube-shaped chamber is filled with a matching fluid emulsion and encompasses 64 antenna elements mounted on its sidewalls (16 per panel). Four resonant frequencies in the range of 0.5-3 GHz are achieved. The design procedure takes into account system constraints and performance requirements, including the near-field nature of the electromagnetic wave and wave propagation into the immersion fluid.
A new quad-band tapered patch transmit-receive antenna array designed for a multistatic microwave imaging cavity system is presented. The reverberating cube-shaped chamber is filled with a matching fluid emulsion and encompasses 64 antenna elements mounted on its sidewalls (16 per panel). Four resonant frequencies that lie in the range of $\text{0.5--3}$ GHz are achieved. The design procedure is provided based on system constraints and performance requirements that need to be taken into account, which include: first, the near-field nature of the electromagnetic wave in the presence of a shielded chamber and, second, the propagation of waves into the immersion fluid within the imaging domain. The antenna array design was numerically verified, and its prototype was fabricated. Results show a good agreement between measurements and simulations, achieving antenna system performance requirements.
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