ArticleSensors (Basel, Switzerland)2022
Gradient Index Metasurface Lens for Microwave Imaging.
Article in Sensors (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Three-Dimensional Scanning Virtual Aperture Imaging with Metasurface.Sensors (Basel, Switzerland) · 2025Article
- Optimal dimensions and performance evaluation of a truncated spherical dielectric lens antenna at X-band frequencies.PloS one · 2025Article
- Advancements in FR4 dielectric analysis: Free space approach and measurement validation.PloS one · 2024Article
Corrections and comments
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Authors and funding
3 authors.
Funding
Abstract
This paper presents the design, simulation and experimental validation of a gradient-index (GRIN) metasurface lens operating at 8 GHz for microwave imaging applications. The unit cell of the metasurface consists of an electric-LC (ELC) resonator. The effective refractive index of the metasurface is controlled by varying the capacitive gap at the center of the unit cell. This allows the design of a gradient index surface. A one-dimensional gradient index lens is designed and tested at first to describe the operational principle of such lenses. The design methodology is extended to a 2D gradient index lens for its potential application as a microwave imaging device. The metasurface lenses are designed and analyzed using full-wave finite element (FEM) solver. The proposed 2D lens has an aperture of size 119 mm (3.17λ) × 119 mm (3.17λ) and thickness of only 0.6 mm (0.016λ). Horn antenna is used as source of plane waves incident on the lens to evaluate the focusing performance. Field distributions of the theoretical designs and fabricated lenses are analyzed and are shown to be in good agreement. A microwave nondestructive evaluation (NDE) experiment is performed with the 2D prototype lens to image a machined groove in a Teflon sample placed at the focal plane of the lens.
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Registered trials
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