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Open AccessArticle

On-Axis Resolution of a Circular Aperture

Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy
Academic Editor: Francisco Falcone
Electronics 2021, 10(6), 729; https://doi.org/10.3390/electronics10060729
Received: 18 February 2021 / Revised: 15 March 2021 / Accepted: 16 March 2021 / Published: 19 March 2021
(This article belongs to the Special Issue Photonic and Microwave Sensing Developments and Applications)
In this paper, the problem to estimate the on-axis resolution in creating a desired field profile by radiation of an aperture A is addressed. The latter applies in both diffractive optics and antenna synthesis. This is because the ‘aperture theory’, A can schematize a source, for example, an antenna or a lens illuminated by an incident field radiating a significant field only on the same aperture. The analysis refers to a customary axicon geometry consisting of a circle aperture transverse to the observation domain. The aim was to find a resolution formula allowing to highlight the impact of aperture geometrical parameters for configurations that are below the Fresnel approximation. The results show that the aperture cannot approximate the target field with the same level of accuracy along with the observation domain. In particular, near the aperture, smaller details can be retrieved and as the distance increases this ability degrades. View Full-Text
Keywords: resolution estimation; field synthesis; radiation resolution estimation; field synthesis; radiation
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MDPI and ACS Style

Maisto, M.A. On-Axis Resolution of a Circular Aperture. Electronics 2021, 10, 729. https://doi.org/10.3390/electronics10060729

AMA Style

Maisto MA. On-Axis Resolution of a Circular Aperture. Electronics. 2021; 10(6):729. https://doi.org/10.3390/electronics10060729

Chicago/Turabian Style

Maisto, Maria A. 2021. "On-Axis Resolution of a Circular Aperture" Electronics 10, no. 6: 729. https://doi.org/10.3390/electronics10060729

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