TY - JOUR
T1 - The Use of Metasurfaces to Enhance Microwave Imaging
T2 - Experimental Validation for Tomographic and Radar-Based Algorithms
AU - Ghavami, Navid
AU - Razzicchia, Eleonora
AU - Karadima, Olympia
AU - Lu, Pan
AU - Guo, Wei
AU - Sotiriou, Ioannis
AU - Kallos, Efthymios
AU - Palikaras, George
AU - Kosmas, Panagiotis
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2022
Y1 - 2022
N2 - Over the last two decades, metamaterials (MMs) and metasurfaces (MTSs) have been used to fabricate innovative antenna designs, offering cost-effective solutions compared to conventional radiating systems. This paper investigates the feasibility of combining MM design concepts and imaging techniques to create innovative microwave imaging systems. In particular, we present an experimental study with the aim of enhancing microwave imaging for haemorrhagic stroke detection using a new MTS design. First, we show the improvement in performance for a stand-alone MTS-loaded antenna, by studying its operating characteristics in the near and far fields. Then, we assess the performance of the MTS on the reconstruction results from simulations and measurements on two tissue-mimicking gel-based brain phantoms with a cylindrical target representing the bleeding in haemorrhagic stroke. The brain phantom was immersed inside an imaging tank filled with 90% glycerol matching liquid. To perform the image reconstructions, we used both a Huygens based radar algorithm and a DBIM-TwIST tomography algorithm. Our simulation and measurement results indicate that the proposed MTS design improves target localization and decreases image artefacts for the tomographic algorithm and enables target's detection through our radar technique, paving the way for a hybrid microwave imaging prototype with MTS enhanced antennas.
AB - Over the last two decades, metamaterials (MMs) and metasurfaces (MTSs) have been used to fabricate innovative antenna designs, offering cost-effective solutions compared to conventional radiating systems. This paper investigates the feasibility of combining MM design concepts and imaging techniques to create innovative microwave imaging systems. In particular, we present an experimental study with the aim of enhancing microwave imaging for haemorrhagic stroke detection using a new MTS design. First, we show the improvement in performance for a stand-alone MTS-loaded antenna, by studying its operating characteristics in the near and far fields. Then, we assess the performance of the MTS on the reconstruction results from simulations and measurements on two tissue-mimicking gel-based brain phantoms with a cylindrical target representing the bleeding in haemorrhagic stroke. The brain phantom was immersed inside an imaging tank filled with 90% glycerol matching liquid. To perform the image reconstructions, we used both a Huygens based radar algorithm and a DBIM-TwIST tomography algorithm. Our simulation and measurement results indicate that the proposed MTS design improves target localization and decreases image artefacts for the tomographic algorithm and enables target's detection through our radar technique, paving the way for a hybrid microwave imaging prototype with MTS enhanced antennas.
KW - metasurfaces (MTSs)
KW - microwave imaging (MWI)
KW - microwave tomography
KW - radar imaging
UR - http://www.scopus.com/inward/record.url?scp=85122789999&partnerID=8YFLogxK
U2 - 10.1109/OJAP.2021.3135146
DO - 10.1109/OJAP.2021.3135146
M3 - Article
AN - SCOPUS:85122789999
SN - 2637-6431
VL - 3
SP - 89
EP - 100
JO - IEEE Open Journal of Antennas and Propagation
JF - IEEE Open Journal of Antennas and Propagation
ER -