Whispering-gallery and Luneburg-lens effects in a beam-fed circularly-layered dielectric cylinder
A. V. Boriskin, A. I. Nosich
TL;DR
This paper investigates the interaction of whispering-gallery modes and Luneburg lens effects in a lossy, layered dielectric cylinder illuminated by a complex source-point beam, revealing how WG modes can impair lens performance.
Contribution
It provides an exact series solution to analyze the combined effects of WG modes and Luneburg lens in layered dielectric cylinders using CSP beam simulation.
Findings
WG modes undermine Luneburg lens performance
Exact series solution for wave scattering in layered cylinders
Far-field patterns and directivity analysis
Abstract
The whispering-gallery mode (WGM) excitation and Luneburg lens (LL) effect are studied for a lossy circularly-layered dielectric cylinder illuminated by a beam field. The latter is simulated by the Complex Source-Point (CSP) beam. Exact series solution to the wave scattering problem is used to obtain the far-field patterns and directivity. The WG mode effect is shown to undermine the LL performance. Index Terms: Layered circular dielectric cylinder, Complex source point beam, Whispering-gallery modes, Luneburg lens.
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