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Paper describes designing procedure of dielectric lens antennas (DLA) for multibeam applications. Two configurations of DLAs are considered, namely: two-shell circularly-layered lens excited by a horn antenna and shaped homogeneous flat-bottom lens excited by an array of printed feeds. Synthesis of the antennas is carried out in the 2-D formulation using highly-efficient in-house softwares based on...
Paper describes the electromagnetic performance of compact-size dielectric lenses typically used as building blocks for integrated lens antennas operating at the microwave to optical ranges. Three configurations of lenses are studied, namely: multi-shell spherical, extended hemielliptical, and shaped ones. Although lenses are usually considered as wideband devices whose operation principles are based...
Focusing and resonance properties of two-dimensional (2-D) small-size hemielliptic lenses made of different materials are studied numerically in order to estimate the influence of internal reflections on the radiation characteristics of dielectric lens antennas (DLA). Accuracy of in-house made algorithms based on combination of geometrical and physical optics (GO, PO) and FDTD in the analysis of optical...
We assess the accuracy and relevance of the numerical algorithms based on the principles of geometrical optics (GO) and physical optics (PO) in the analysis of reduced-size homogeneous dielectric lenses prone to behave as open resonators. As a benchmark solution, we use the Muller boundary integral equations (MBIEs) discretized with trigonometric Galerkin scheme that has guaranteed and fast convergence...
Dielectric lens antennas are quasi-optical devices well suited for shaped-beam applications at millimetre waves. In this paper, we present a powerful computer-aided design (CAD) tool for the analysis and optimization of multi-shell integrated lens antennas (ILAs) of arbitrary 3-D shape. The optimization technique is based on a binary genetic algorithm (GA) coupled to the hybrid geometrical optics...
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