Results 1 to 10 of about 1,200 (108)
Ultra‐compact 3 × 3 Nolen matrix beamforming network
IET Microwaves, Antennas and Propagation, 2020 A novel compact 3 × 3 Nolen matrix beamforming network is proposed in this study. Unlike the Butler matrix and Blass matrix, in this design, the proposed feeding network only requires couplers and phase shifters and removes crossovers and load terminations.
Hanxiang Zhang +2 more
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A 3×3 Antenna Beamforming Network Based on Waveguide Nolen Matrix for Ka-Bands
IEEE AccessThe Fifth generation (5G) wireless communication system aims to provide high bandwidth, high sensitivity, high gain and power capability. Millimeter wave technology then proposed for these demands with various range of features such as higher bandwidth ...
Hatem Oday Hanoosh +3 more
doaj +3 more sources
Five-Beam Fully Metallic Nolen Matrix-Based Array Antenna for 5G Applications at 26 GHz
IEEE Transactions on Antennas and Propagation[EN] The communication explores the development of a Nolen Matrix operating at 26 GHz (25.25 GHz¿26.75 GHz) using E-plane rectangular waveguides. The Nolen network comprises 5 coaxial input ports and 7 outputs, each linked to a linear array of 9 elements.
M Baquero-Escudero +2 more
exaly +3 more sources
Generalized One-Dimensional Parallel Switching Matrices With an Arbitrary Number of Beams
IEEE Journal of Microwaves, 2021 This paper introduces a novel family of one-dimensional switching matrices, also known as beamforming networks (BFNs), which can be sized for an arbitrary number of beams.
Jiro Hirokawa, Nelson J. G. Fonseca
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IEEE Journal of Microwaves, 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 with ...
Shengjia Wu +3 more
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IEEE Access, 2022 Beamforming networks for multiple beam antennas are believed to be in the vanguard of technological developments in mmWave for 5G wireless applications. The basic idea of beamforming technique is the application of multiple antenna elements radiating the
Abdulkadir Bello Shallah +6 more
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Structural Justice Ethics in Health Care
Voices in Bioethics, 2021 Photo by Waranont (Joe) on Unsplash INTRODUCTION The age-adjusted COVID-19 mortality rate among Black Americans is twice as high as White Americans.[1] This shocking evidence of health disparities, coincident to a public reckoning with the history of
Wendy DiChristina
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Discussion on Reciprocity, Unitary Matrix, and Lossless Multiple Beam Forming Networks
International Journal of Antennas and Propagation, 2015 The Lorentz reciprocity theorem enables us to establish that the transmitting and receiving patterns of any antenna are identical, provided some hypotheses on this antenna and the surrounding medium are satisfied.
Nelson Jorge G. Fonseca
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IEEE Open Journal of the Communications SocietyThis work presents the design and experimental validation of an integrated single-layer $4\times 4$ Nolen beamforming matrix (NBM) implemented in groove gap waveguide (GGW) technology as an enabling front-end for multi-beam satellite gateway systems ...
Mohammad Alibakhshikenari +10 more
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Synthesis of Lossless Multiports as Minimum Depth Chessboard Networks
IEEE Open Journal of Circuits and SystemsThe synthesis of lossless multiport networks is a classic topic of circuit theory, with broad application in various signal distribution and processing systems. This paper presents a method for synthesizing reciprocal lossless $N$ -port networks with an
Piero Angeletti +3 more
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