File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

최은미

Choi, EunMi
THz Vacuum Electronics and Applied Electromagnetics Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Amplitude Non-Uniformity of Millimeter-Wave Vortex Beams Generated by Transmissive Structures

Author(s)
Sawant, AshwiniLee, IngeunChoi, Eunmi
Issued Date
2022-06
DOI
10.1109/TAP.2022.3140520
URI
https://scholarworks.unist.ac.kr/handle/201301/60132
Citation
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, v.70, no.6, pp.4623 - 4631
Abstract
We investigate the origin of non-uniformity in an orbital angular momentum (OAM) beam generated by a transmissive structure in the millimeter-wave frequency range. This work includes the study of amplitude non-uniformity including modal composition analysis using the angular spectrum method (ASM) for OAM beams generated by spiral phase plates (SPPs) and flat-surface metamaterial structures (MSs). The dependency of the axial dimension, over which the OAM beam transforms from a Gaussian beam, on the amplitude non-uniformity of both the structures has been rigorously analyzed. For experimental verification, we designed a perforated planar dielectric slab to convert the Gaussian beam into an OAM beam of order 2 with improved amplitude uniformity. Within the manufacturing limitations, the design of the transmissive MS was fabricated and tested to obtain optimum amplitude uniformity in the generation of OAM beams and to compare with simulation results.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
ISSN
0018-926X
Keyword (Author)
Millimeter wave technologyMetamaterialsAntenna radiation patternsmetamaterialsMetasurfacesElectric fieldsCodesAzimuthal angleSimulation
Keyword
ORBITAL ANGULAR-MOMENTUMSPECTRUM METHODANTENNA

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.