Results 21 to 30 of about 2,245,350 (289)
Discrete Cylindrical Vector Beam Generation from an Array of Optical Fibers [PDF]
, 2009 A novel method is presented for the beam shaping of far field intensity distributions of coherently combined fiber arrays. The fibers are arranged uniformly on the perimeter of a circle, and the linearly polarized beams of equal shape are superimposed ...
Armstrong +34 more
core +1 more source
A Low Complexity 2D Pattern Synthesis Algorithm for Cylindrical Array
International Journal of Antennas and Propagation, 2013 This paper proposes a 2D pattern synthesis algorithm for cylindrical array. According to the geometric characteristic of cylinder, we can regard a cylindrical array as an equivalent linear array whose elements are identical circular subarrays. Therefore,
Chao Liu, Zhizhong Ding, Xiaoping Liu
doaj +1 more source
Synthesis of Phased Cylindrical Arc Antenna Arrays [PDF]
International Journal of Antennas and Propagation, 2009 This paper describes a new approach to synthesize cylindrical antenna arrays controlled by the phase excitation, to synthesize directive lobe and multilobe patterns with steered zero. The proposed method is based on iterative minimization of a function that incorporates constraints imposed in each direction.
Rammal, Hussein +4 more
openaire +4 more sources
Terahertz scattering by subwavelength cylindrical arrays
Optics Express, 2011 We demonstrate the use of a full-wave electromagnetic field simulator to verify terahertz (THz) transmission-mode spectroscopic measurements of periodic arrays containing subwavelength cylindrical scatterers. Many existing THz scattering studies utilize analytical solutions, which were developed for a single scatterer.
Png, G. +4 more
openaire +3 more sources
Pattern synthesize of a cylindrical conformal array antenna by PSO algorithm
International journal of RF and microwave computer-aided engineering, 2020 Pattern synthesize of conformal array antennas is often a challenging problem. Various optimization algorithms such as genetic, particle swarm optimization (PSO), and invasive weed optimization have already been used for pattern synthesizing of conformal
Mohammadmahdi Alizadeh, S. E. Hosseini
semanticscholar +1 more source
High Accuracy 2D-DOA Estimation for Conformal Array Using PARAFAC
International Journal of Antennas and Propagation, 2014 Due to the polarization diversity (PD) of element patterns caused by the varying curvature of the conformal carrier, the conventional direction-of-arrival (DOA) estimation algorithms could not be applied to the conformal array.
Liangtian Wan +4 more
doaj +1 more source
Cylindrical array luminescent solar concentrators: performance boosts by geometric effects.
Optics Express, 2016 This paper presents an investigation of the geometric effects within a cylindrical array luminescent solar concentrator (LSC). Photon concentration of a cylindrical LSC increases linearly with cylinder length up to 2 metres.
Jose J. H. Videira +2 more
semanticscholar +1 more source
A wideband cylindrical conformal microstrip mimo antenna array
Electronics Letters, 2023 In this paper, a wideband cylindrical conformal microstrip antenna array employing a proximity‐coupled feeding mechanism with a cavity‐backed configuration is designed and fabricated.
Song‐Song Qian +5 more
doaj +1 more source
Conformal Antenna Array for Millimeter-Wave Communications: Performance Evaluation
, 2015 In this paper, we study the influence of the radius of a cylindrical supporting structure on radiation properties of a conformal millimeter-wave antenna array.
Bisognin, A. +7 more
core +1 more source
Limitations of Surface Current Model of Magnetic Field and a Remedy
IEEE Access, 2022 It is well known that any realistic static magnetic field in a source-free volume can be generated by electric currents on a surface enclosing the volume.
Youngseob Seo, Zhiyue J. Wang
doaj +1 more source