Results 211 to 220 of about 16,043 (252)
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Microstrip Butler matrix design and realization for 7 T MRI
Magnetic Resonance in Medicine, 2011AbstractThis article presents the design and realization of 8 × 8 and 16 × 16 Butler matrices for 7 T MRI systems. With the focus on low insertion loss and high amplitude/phase accuracy, the microstrip line integration technology (microwave‐integrated circuit) was chosen for the realization.
Yazdanbakhsh, Pedram, Solbach, Klaus
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The uniqueness of the Butler matrix as a commutating switch
IEEE Transactions on Antennas and Propagation, 1971It is shown that the Butler matrix is the only N input, N output network with the property that its output currents can be permuted cyclically by varying the phases of its input currents.
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Novel butler matrix using CPW multilayer technology
IEEE Transactions on Microwave Theory and Techniques, 2005In 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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3D-Butler matrix topologies for phased arrays
2007 International Conference on Electromagnetics in Advanced Applications, 2007The investigation described here is being carried out within the NATALIA project funded by the ESA. This project aims at the realisation of a low-cost receive-only Ku-band phased array antenna for automotive applications for which low-cost and small dimensions are the most essential features.
L. Baggen, M. Bottcher, M. Eube
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A Single-Layer Hollow-Waveguide 8-Way Butler Matrix
IEICE Transactions on Electronics, 2005The authors propose a single-layer hollow-waveguide 8-way Butler matrix. All components of the Butler matrix are in a single layer which contributes to low-cost fabrication. To reduce the length of the couplers, a step structure is installed in the coupled region.
Shin-ichi YAMAMOTO +2 more
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Design of a new millimeter-wave Butler matrix
2006 IEEE Antennas and Propagation Society International Symposium, 2006A 4 /spl times/ 4 slot Butler matrix has been designed around 38 GHz band. The circuit is compact and has low losses. In the proposed design, a novel slot hybrid coupler and slot cross-over were also designed and introduced. This new configuration demonstrates the possibility to design Butler matrices using slot-line technology.
M. Nedil, T.A. Denidni
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Dual butler matrix active antenna system
Microwave and Optical Technology Letters, 2007AbstractThis article describes a smart antenna system that employs low noise amplifiers and two cascaded Butler Matrices. The output signals from the first Butler Matrix, which acts as a beamforming network, have high gain and narrowbeam width for long distance communication while the outputs from the second Butler Matrix, which acts as a mirror of the
Abdul Rahim, Sharul Kamal +1 more
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Folded C-Type SIW Butler Matrix
2019 IEEE MTT-S International Wireless Symposium (IWS), 2019This work presents a novel miniaturized 4×4 Butler Matrix (BM) base on Folded C-Type substrate integrated waveguide (FCSIW), operating from 28 to 32GHz. In theory, the size of FCSIW can be reduced by nearly 50% compared with the substrate integrated waveguide (SIW) with similar propagation and cut-off characteristics.
Qiang Sun +4 more
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Wideband butler matrix in microstrip-slot technology
2009 Asia Pacific Microwave Conference, 2009The design of a 4 x 4 Butler Matrix for use in a multi-beam antenna array operating over wide frequency band is presented. In order to achieve wideband characteristics, the matrix uses microstrip-slot technology that employs two microstrip dielectric layers with a common ground plane and a coupling slot.
Ibrahim, Siti Zuraidah +1 more
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Design of a Butler Matrix for Switched Beam Application
2018 IEEE MTT-S Latin America Microwave Conference (LAMC 2018), 2018A 4×4 Butler Matrix with a linear aperture coupled antenna array was designed. The design was aimed for a 2.45 GHz resonance frequency and was done on a FR-4 substrate in order to obtain four differents beams. Simulation were done with Advanced Design System and ANSYS HFSS softwares. For one antenna a 3.7 dB radiation magnitude was achieved at 2.45 GHz
Arthur Cesare-Herriau +4 more
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