Results 91 to 100 of about 2,845,707 (370)
Design and implementation of a patch-fractal antenna with phase control using Butler matrix
MaskayThe study presents the successful design and implementation of a phase-controlled patch-fractal antenna using the Butler array. This work focuses on developing a laboratory prototype of a 4x4 array using microstrip technology.
Joel Marcelo Chuquimarca Pomagualli +4 more
doaj +1 more source
Strategic Change, EarlyView.ABSTRACT Research has often portrayed entrepreneurs in largely positive terms, reflecting their contributions to innovation, employment, and economic growth. At the same time, it is well recognized that entrepreneurial activity can also involve harmful and unethical behaviors, as evidenced by numerous cases of misconduct among business owners and ...
Leonie Baldacchino, Sara Sassetti
wiley +1 more source
Open-Loop Beamforming Technique for MIMO System and Its Practical Realization
International Journal of Antennas and Propagation, 2011 The concept of close-loop beamforming for MIMO system was well known proposed the singular value decomposition on channel matrix. This technique can improve the capacity performance, but the cost of feedback channel and the complexity processing discard
Peerapong Uthansakul +2 more
doaj +1 more source
Implementation of a New and Modified Scheme of Butler Matrix for C-Band Applications with Enhanced Characteristics [PDF]
Radioengineering, 2020 In this paper, the structure of a miniaturized broadband 4 × 4 Butler matrix is presented. All components of the proposed feeding network are designed in a way that they have the smallest electrical size and acceptable performance in the C band.
M. Maleki +3 more
doaj
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
C II abundances in early-type stars: solution to a notorious non-LTE problem
, 2006 We address a long-standing discrepancy between non-LTE analyses of the prominent C II 4267 and 6578/82 A multiplets in early-type stars. A comprehensive non-LTE model atom of C II is constructed based on critically selected atomic data.
Cowley C. +6 more
core +1 more source
Quantifying Protein–Glycan Interactions Using Native Mass Spectrometry
Mass Spectrometry Reviews, EarlyView.ABSTRACT Interactions between glycan‐binding proteins (GBPs) and carbohydrates (glycans) are essential to many biological processes relevant to human health and disease. For most GBPs, however, their glycan interactome—the repertoire of glycans recognized and their specificities—is poorly defined.
Duong T. Bui +4 more
wiley +1 more source
Micromachined Millimetre-Wave Passive Components at 38 and 77 GHz [PDF]
, 2009 A precision micro-fabrication technique has been developed for millimetre-wave components of air-filled three-dimensional structures, such as rectangular coaxial lines or waveguides.
Huang, F. +4 more
core
Near Surface Geophysics, EarlyView.Abstract Electrical resistivity tomography (ERT) has been shown to be effective for surveying and monitoring dams, due to the method's sensitivity to moisture content and relevant physical properties (e.g., porosity). Automated ERT systems, capable of time‐lapse monitoring, can be used to detect variations in ground conditions.
John S. Ball +4 more
wiley +1 more source