Graded index all-dielectric lens antenna designed by phase manipulation and optical path rescaling

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00131674" target="_blank" >RIV/00216224:14310/23:00131674 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.optlastec.2023.109125" target="_blank" >https://doi.org/10.1016/j.optlastec.2023.109125</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.optlastec.2023.109125" target="_blank" >10.1016/j.optlastec.2023.109125</a>

Result language

angličtina

Original language name

Graded index all-dielectric lens antenna designed by phase manipulation and optical path rescaling

Original language description

A rotationally symmetric all-dielectric lens antenna is designed by defining the phase function inside the dielectric directly via a closed-form series formula. The refractive index of the lens is modified using state-of-the-art optical path rescaling to keep the refractive index within practical values. The lens optimization is done using the genetic algorithm in MATLAB, where each case is evaluated by conducting linked ray tracing and full -wave electromagnetic simulation in COMSOL. A lens prototype is shown to provide a directivity enhancement of 5.1 dB compared to the optimal conical horn antenna, an improvement of 2 dB compared to the Luneburg lens, and an improvement of 3.8 dB compared to a reference graded index lens. All the examined cases shared a similar length of for the center frequency of 10 GHz. The prototype lens antenna has a maximum refractive index of 2.1, a reflection coefficient of -22 dB, and a side-lobe level of -25 dB at the center frequency of 10 GHz. The lens' performance is consistent in the 9-11 GHz band supported by the standard circular waveguide. The results from a prototype with a discretized refractive index simulated in CST Studio Suite are in excellent agreement with the ones with a continuous refractive index profile simulated in COMSOL.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Optics and Laser Technology

ISSN

0030-3992

e-ISSN

1879-2545

Volume of the periodical

161

Issue of the periodical within the volume

June

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

1-8

UT code for WoS article

000962872300001

EID of the result in the Scopus database

2-s2.0-85146056003