Results 31 to 40 of about 16,043 (252)
Switch-Beam Vivaldi Array Antenna Based On 4x4 Butler Matrix for mmWave
MATEC Web of Conferences, 2018 It will be diffcult to use either omnidirectional or fixed beam antenna due to the high propagation losses caused by atmospheric absorption at mmWave for 5G mobile communication.
Safitri Nurlaila +2 more
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Design and Implementation of Butler Matrix
The Journal of Korea Information and Communications Society, 2014 Beam forming techniques are used to increase the efficiency of using frequency. In this paper we design and implement Butler matrix to be used for ISM band. The implemented Butler matrix has the insertion loss of maximum 6.7dB and the maximum phase shift error of over 2.4~2.485GHz.
openaire +2 more sources
Dual-band Butler matrix for WLAN systems [PDF]
IEEE MTT-S International Microwave Symposium Digest, 2005., 2005 This paper shows the design of a dual-band Butler matrix aimed to cover the bands corresponding to the standards IEEE802.11a/b, with particular interest in WLAN systems, at the 2.4 GHz and 5 GHz bands. Measurements of the individual dual-band components which compose the Butler matrix are presented.
Collado Gómez, Juan Carlos +2 more
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Method of Synthesizing Orthogonal Beam-Forming Networks Using
IEEE Access, 2019 A synthesis method for orthogonal beam-forming networks (BFNs) with arbitrary N inputs and N outputs is presented. Compared to those formerly developed, the new method allows the design of a BFN in order to not only generate arbitrary N orthogonal beams ...
Li Sun, Guanxi Zhang, Baohua Sun
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Advanced Functional Materials, EarlyView.Sulfur‐doped graphitized carbon nanofibers act as adaptive catalyst–support platforms, enabling dynamic sulfur‐mediated reconstruction and strong metal–support interactions. This unique behavior enhances catalyst stability and controls reaction pathways, achieving highly selective urea oxidation (∼92% N2) coupled with efficient hydrogen evolution ...
Melanie Guillén‐Soler +4 more
wiley +1 more source
Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix [PDF]
Advances in Radio Science, 2011 The Leibniz-Institute of Atmospheric Physics (IAP) in Kühlungsborn started to install a new MST radar on the North-Norwegian island Andøya (69.30° N, 16.04° E) in 2009.
T. Renkwitz +3 more
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Advanced Materials, EarlyView.A soft–hard tri‐layer composite electrolyte that couples fast Li+ transport with reinforced interfacial stability to enable high‐conductivity, mechanically robust, dendrite‐free lithium‐metal batteries. ABSTRACT The development of solid polymer electrolytes is central to safe, high‐energy lithium‐metal batteries (LMBs); however, persistent challenges ...
Fazal Ur Rehman +9 more
wiley +1 more source
Microstrip EHF Butler Matrix Design and Realization [PDF]
ETRI Journal, 2005 This paper describes the design and realization of an extra high frequency band 8 × 8 microstrip Butler matrix. Operation at 36 GHz is achieved with a frequency bandwidth exceeding 400 MHz. The circuit is implemented on a bi-layer microstrip structure using conventional manufacturing processes.
Jean-Sébastien Néron +1 more
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Advanced Materials Interfaces, EarlyView.Interfacial charge transfer and low‐resistance interphase formation between PEO‐based polymer and Li10GeP2S12 solid electrolytes are investigated using multi‐electrode impedance spectroscopy and advanced analytical techniques such as XPS and ToF‐SIMS.
Ujjawal Sigar +6 more
wiley +1 more source
Advanced Science, EarlyView.This study combines full‐field tomography with diffraction mapping to quantify radial (ε002$\varepsilon _{002}$) and axial (ε100$\varepsilon _{100}$) lattice strain in wrinkled carbon‐fiber specimens for the first time. Radial microstrain gradients (−14.5 µεMPa$\varepsilon \mathrm{MPa}$−1) are found to signal damage‐prone zones ahead of failure, which ...
Hoang Minh Luong +7 more
wiley +1 more source