Publication details
A General Solution for Double-Layer Gradient-Index and Geodesic Lenses with Rotational Symmetry
| Authors | |
|---|---|
| Year of publication | 2023 |
| Type | Article in Proceedings |
| Conference | 2023 17th European Conference on Antennas and Propagation (EuCAP) |
| MU Faculty or unit | |
| Citation | |
| Web | https://ieeexplore.ieee.org/document/10133223 |
| Doi | http://dx.doi.org/10.23919/EuCAP57121.2023.10133223 |
| Keywords | Double-layer lens; geodesic lens; gradient index; fully metallic; PPW; lens antennas; metasurfaces; millimeter waves; sub-THz |
| Description | A double-layer lens consists of a pair of rotationally symmetric index profiles or geodesic lens shapes connected by a reflecting mirror partially covering their common periphery. Such a lens can provide a focus in each layer, and a wave travelling between the foci explores both layers. Here, we concentrate on the case with one layer being homogeneous or flat, and derive a general solution for the lens profiles by solving a Luneburg-like inverse problem with pre-specified foci inside or outside the lens, and different background indices in two layers. We demonstrate four examples of interest in ray-tracing plots. These lenses may find application in communications, sensing, and imaging from millimeter waves up to the optical bands. |