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of 2 091
pro vyhledávání: '"NELSON, P. G."'
Electromagnetic linear-to-circular polarization converters with wide- and multi-band capabilities can simplify antenna systems where circular polarization is required. Multi-band solutions are attractive in satellite communication systems, which comm
Externí odkaz:
http://arxiv.org/abs/2207.04019
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 1, Pp 58-66 (2024)
In this paper, a novel dual-slant polarized three-dimensional (3D) periodic Luneburg lens with a diameter of 390 mm ( $4.6\lambda _{0}$ at 3.55 GHz) is presented. Copper-plated cubes with truncated corners are placed in a body-centered cubic (BCC) la
Externí odkaz:
https://doaj.org/article/3acc58d3ec4347e3b5040e62f6471393
Akademický článek
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Akademický článek
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Smuggling of special nuclear materials (SNM) and nuclear devices through borders and ports of entry constitutes a major risk to global security. Technologies are needed to reliably screen the flow of commerce for the presence of high-$Z$ materials su
Externí odkaz:
http://arxiv.org/abs/1911.12276
Publikováno v:
IEEE Journal of Microwaves, Vol 3, Iss 4, Pp 1199-1211 (2023)
This article provides for the first time a detailed discussion of the optimal assignment of adjacent output phase differences in terms of matrix performance out of all possible combinations in generalized one-dimensional parallel switching matrices w
Externí odkaz:
https://doaj.org/article/99e2f63eb6e54b22972f4829bb268c3c
Publikováno v:
IEEE Access, Vol 11, Pp 74239-74249 (2023)
This paper presents a design of a two-dimensional (2-D) $6\times 4$ -way hollow waveguide beam-switching matrix working at 28.25 GHz, with a fractional bandwidth of 7.1%. It is the first time that a 2-D one-body hollow waveguide beam-switching matrix
Externí odkaz:
https://doaj.org/article/3d1b3542da1141b1b7b7ab1d6999ad26
Publikováno v:
IEEE Journal of Microwaves, Vol 3, Iss 2, Pp 800-814 (2023)
3D-printing is leading to a major transformation in many industrial and application sectors, ranging from medical to aerospace. In the space sector, 3D-printing has firstly been adopted for the development of structural and thermal parts, such as bra
Externí odkaz:
https://doaj.org/article/7255d0c991174c1882b99436185cf373
Autor:
Nicola Bartolomei, Darwin Blanco, Francois Doucet, Etienne Girard, Herve Legay, Nelson J. G. Fonseca, Ronan Sauleau, Mauro Ettorre
Publikováno v:
IEEE Access, Vol 11, Pp 4602-4614 (2023)
This work presents a full metal circularly-polarized lens-like antenna for Satcom applications at Ka-band. The antenna is composed of two continuous parallel plate waveguide (PPW) quasi-optical beamformers (QOBF), feeding an array of septum polarizer
Externí odkaz:
https://doaj.org/article/8b1f595cdf6246978eb422467d37155a
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-14 (2022)
Abstract Electromagnetic linear-to-circular polarization converters with wide- and multi-band capabilities can simplify antenna systems where circular polarization is required. Multi-band solutions are attractive in satellite communication systems, w
Externí odkaz:
https://doaj.org/article/4d6f4511e5a34b1799e161c55552ef6e