Title
Design Formulas for Flat Gradient Index Lenses with Planar or Spherical Output Wavefront
Author
Hu, Weiya (Student TU Delft)
Coco Martin, C.M. (TU Delft Tera-Hertz Sensing)
Cavallo, D. (TU Delft Tera-Hertz Sensing) 
Date
2024
Abstract
A semi-analytical method is presented for the design of gradient index (GRIN) flat lenses. Closed-form expressions are derived to define the refractive index distribution of the lens, for several cases: collimating lenses with on-axis feed, collimating lenses with off-axis feed, lenses converting spherical wavefronts with different wavenumbers, lenses changing the focal number of a quasi-optical system, and Fresnel zone lenses. The design equations are validated by ray-tracing simulations in inhomogeneous media, implemented by numerical solution of the Eikonal equation.
Subject
geometrical optics
gradient indexes lenses
lens antennas
optical design
ray tracing
To reference this document use:
http://resolver.tudelft.nl/uuid:6d8dc39f-14bc-419e-b776-56328b984521
DOI
https://doi.org/10.1109/TAP.2024.3363433
Embargo date
2024-08-07
ISSN
1558-2221
Source
IEEE Transactions on Antennas and Propagation, 72 (3), 2555-2563
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 Weiya Hu, C.M. Coco Martin, D. Cavallo