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The link between gender inequality and the distribution of brain regions’ relative sizes across the lifespan and the world

Vidaurre D, Morell-Ortega S, Oyarzo P, Butler CR, Charquero-Ballester M, Gadea M, Morandat F, Mansencal B, Coupé P, Manjón JV.   +9 more
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Asymmetrical $4\times4$ Butler Matrix and its Application for Single Layer $8\times8$ Butler Matrix

IEEE Transactions on Antennas and Propagation, 2019
The design procedure and measured results of a novel $4\times 4$ Butler matrix are presented in this paper. This asymmetrical structure provides fairly flexible phase outputs; therefore, the array radiation pattern can be rotated around the array normal axis.
Ali Tajik, Ahmad Shafiei Alavijeh, Mohammad Fakharzadeh   +2 more
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A Compact Broadband 4×4 Butler Matrix With 360° Continuous Progressive Phase Shift

IEEE Transactions on Microwave Theory and Techniques, 2023
This article presents a novel compact broadband $4\times 4$ Butler matrix with 360° continuous progressive phase shift. The tunable Butler matrix is composed of a typical $4\times 4$ Butler matrix and four wideband continuously tunable phase shifters
Xi-Zhu Wang, Fulong Chen, Q. Chu
semanticscholar   +3 more sources

Additively Manufactured 8x8 Butler Matrix Beamformer Design

2024 IEEE International Symposium on Phased Array Systems and Technology (ARRAY)
In this paper, the design of an $8 \times 8$ Butler matrix, for fabrication with additive manufacturing, is presented. The use of additive manufacturing offers more design flexibility, with the opportunity to design parts in 3-dimensions.
Anna Stumme, Gregory Huff, W. Mark Dorsey   +2 more
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Butler Matrix 4x4 Ultra High Frequency

2020 Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO), 2020
A Butler matrix scheme with the possibility of forming four independent radiation patterns is proposed. The dimensions of the circuit under consideration were reduced due to the miniaturization of all directional couplers included in the matrix. The dimensions of the couplers were reduced using artificial transmission lines - this allowed to reduce the
Dilshod C. Ravshanov, D. A. Letavin, I. A. Terebov   +2 more
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Wideband Slot-Coupled Butler Matrix

IEEE Microwave and Wireless Components Letters, 2014
We present a multilayer 4 × 4 Butler matrix based on corrugated slot-coupled structures, which operates over the complete UWB band (3.1 to 10.6 GHz) with excellent phase and amplitude performance. A prototype has been fabricated which covers the UWB band with a measured return loss better than 21 dB, an isolation better than 24 dB, an amplitude ...
A. Moscoso-Martir, I. Molina-Fernandez, A. Ortega-Monux   +2 more
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Novel UWB multilayer Butler matrix

2010 IEEE Antennas and Propagation Society International Symposium, 2010
Smart antennas are introduced to improve the performance of wireless systems and increase their capacity by spatial filtering, which can separate spectrally and temporally overlapping signals from multiple users. Switched beams systems are referred as smart antenna system that forms multiple fixed beams with enhanced sensitivity in a specific area ...
M traii, M Nedil, A Gharsallah, T A Denidni   +3 more
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Novel butler matrix using CPW multilayer technology

IEEE Transactions on Microwave Theory and Techniques, 2005
In this paper, a novel 4 times 4 two-layer Butler matrix based on a broad-band two-layer slot-coupled directional coupler is presented and implemented at 5.8 GHz using coplanar waveguide technology. With the slot-coupled directional coupler, the proposed matrix was designed without using any crossovers as used in conventional Butler matrices, which ...
M. Nedil, T.A. Denidni, L. Talbi
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Butler matrix for harmonic radar application

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE), 2016
This paper presents a Butler matrix for harmonic radar application. The proposed Butler matrix has the same beam directions in the two different frequencies and the higher frequency can be the double of the lower frequency. Therefore, it can be implemented on the harmonic radar for beam steering function.
Zuo-Min Tsai, Po-Shien Li
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A high-temperature superconducting butler matrix

IEEE Transactions on Appiled Superconductivity, 2003
This paper presents a novel configuration of a beamforming 16-port Butler matrix centered on a frequency of 2 GHz. The structure is implemented using high-temperature superconductors (HTS). In communication and remote sensing systems, multibeam antenna systems are gradually replacing single-beam systems.
A. Corona, M.J. Lancaster
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