Zobrazeno 1 - 10
of 352
pro vyhledávání: '"conical beam"'
Publikováno v:
IEEE Access, Vol 12, Pp 125306-125318 (2024)
This article proposes a novel planar array antenna for reconfigurable circular polarization (CP) with conical-beam radiation. The array consists of four radiating elements and a two-dimensional (2D) switchable feed network. Each element can switch CP
Externí odkaz:
https://doaj.org/article/d66cddd27f32483083562f0786141f3d
Autor:
Mohammad Akbari, Marek Klemes, Soulideth Thirakoune, Greg Bowles, Michael Schwartzman, Andrei Buliga, Kevin Zhang, Lan Hu, Tan Huy Ho, David Wessel
Publikováno v:
IEEE Access, Vol 12, Pp 114157-114169 (2024)
This manuscript proposes the design of a 28 GHz antenna system that is capable of generating at the same time five orbital angular momentum (OAM) modes with aligned far-field antenna patterns. The antenna system includes a radial line slot antenna (R
Externí odkaz:
https://doaj.org/article/8d458ea98e374aa388ecab2c03f29ccf
Autor:
Eligia Simionato, Ivan Aldaya, Jose A. de Oliveira, Andre L. Jardini, Julian Avila, Guilherme S. da Rosa, Rafael A. Penchel
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 4, Pp 1121-1132 (2024)
This work introduces a Ka-band coaxial horn antenna that incorporates a specialized dielectric supporting structure and a transition to a 2.4 mm connector. The inner and outer radii of the coaxial aperture were sized using an approximated model for a
Externí odkaz:
https://doaj.org/article/602d887aee8c4c12969e6dc7626e870f
Akademický článek
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Akademický článek
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Publikováno v:
Photonics, Vol 10, Iss 5, p 577 (2023)
A controllable helico-conical beam is proposed in this paper. The intensity patterns and the local spatial frequency of the controllable helico-conical beams in the focal region are analyzed in detail. The results show that the length of the helico-c
Externí odkaz:
https://doaj.org/article/cc84ede1145a448e834abdc10fcf8d5b
Publikováno v:
IEEE Access, Vol 8, Pp 103291-103300 (2020)
A novel sum and difference (SD) conical beam-scanning reflector antenna is proposed in this paper. The reflector surface, illuminated by two omnidirectional horns, is a body of revolution obtained by revolving the generating parabola about a symmetry
Externí odkaz:
https://doaj.org/article/a2a15595e5db4b1994c27062f1fef81f
Akademický článek
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Fabrication of Chiral 3D Microstructure Using Tightly Focused Multiramp Helico-Conical Optical Beams
Autor:
Jisen Wen, Qiuyuan Sun, Mengdi Luo, Chengpeng Ma, Zhenyao Yang, Chenyi Su, Chun Cao, Dazhao Zhu, Chenliang Ding, Liang Xu, Cuifang Kuang, Xu Liu
Publikováno v:
Micromachines, Vol 13, Iss 10, p 1771 (2022)
Beams with optical vortices are widely used in various fields, including optical communication, optical manipulation and trapping, and, especially in recent years, in the processing of nanoscale structures. However, circular vortex beams are difficul
Externí odkaz:
https://doaj.org/article/0c3968d0298d494cb14076dab973af0b
Publikováno v:
IEEE Access, Vol 7, Pp 31043-31054 (2019)
A novel reconfigurable microstrip magnetic dipole antenna with switchable conical beams is proposed for aerial drone applications. The proposed antenna consists of three sub-cavities that are separated by two groups of shorting posts. To reconfigure
Externí odkaz:
https://doaj.org/article/5fb5153e1a554821b0b96090023bd4ba