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Journal Article Simple Generation of Orbital Angular Momentum (OAM) Modes with Azimuthally Deformed Cassegrain Subreflector
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Authors
Byun Woo Jin, Lee Young Seung, Kim Bong-Su, Kim Kwang Seon, Kang Min Soo, 조용희
Issue Date
201509
Source
Electronics Letters, v.51 no.19, pp.1480-1482
ISSN
0013-5194
Publisher
IET
DOI
https://dx.doi.org/10.1049/el.2015.1833
Project Code
15MR3700, Development of core technologies to improve spectral efficiency for mobile big-bang, Choi Hyung Do
Abstract
A parabolic reflector antenna with an azimuthally deformed Cassegrain subreflector is proposed to effectively generate arbitrary orbital angular momentum (OAM) modes. The Cassegrain dual-reflector antenna was fabricated for 18 GHz and measured in the near-field range. The nearfield to far-field transformed radiation phase around a full azimuth shows that the proposed antenna generates fields with the l = 1 OAM mode. Simulated and measured feed reflection coefficients are below-10 dB for 15.1-21.2 GHz, even though the distance between a horn feed and a deformed subreflector is 15.6 mm, thus it is expected that the proposed structure can be used for a broadband low-profile antenna.
KSP Keywords
18 GHz, Far-field, Low-profile antenna, Orbital Angular Momentum, Parabolic reflector antenna, Reflection Coefficient, dual-reflector antenna, near-field