Results 51 to 60 of about 125,191 (194)

Spurious mode reduction in dual injection-locked optoelectronic oscillators

Optics Express, 2011
Optoelectronic oscillators (OEOs) are promising sources of low phase noise radio frequency (RF) signals. However, at X-band frequencies, the long optical fiber delay line required for a high oscillator Q also leads to spurious modes (spurs) spaced too narrowly to be filtered by RF filters.
O, Okusaga, E J, Adles, E C, Levy, W, Zhou, G M, Carter, C R, Menyuk, M, Horowitz   +6 more
openaire   +2 more sources

Limitations of Hall MHD as a model for turbulence in weakly collisional plasmas [PDF]

Nonlinear Processes in Geophysics, 2009
The limitations of Hall MHD as a model for turbulence in weakly collisional plasmas are explored using quantitative comparisons to Vlasov-Maxwell kinetic theory over a wide range of parameter space. The validity of Hall MHD in the cold ion limit is shown,
G. G. Howes
doaj  

New structure of dielectric resonator with greater separation of higher order modes from fundamental mode [PDF]

International Journal of Electronics and Telecommunications
The paper presents a new dielectric resonator structure that allows to obtain a larger distance between the resonant frequency of TE011 mode and higher resonant modes: HE111, TM011 and EH111.
Krzysztof Derzakowski, Adam Abramowicz
doaj   +1 more source

Modal decomposition technique for multimode fibers

, 2012
International audienceWe propose a new solution for modal decomposition in multimode fibers, based on a spectral and spatial imaging technique. The appearance of spurious modes in the spectral and spatial processing of the images at the output of the ...
Blin, Stéphane, Chartier, Thierry, Le, Sy Dat, Nguyen, Duc Minh, Nguyen, Thanh Nam, Provino, Laurent, Thual, Monique   +6 more
core   +3 more sources

Self-consistent description of nuclear compressional modes [PDF]

, 2001
Isoscalar monopole and dipole compressional modes are computed for a variety of closed-shell nuclei in a relativistic random-phase approximation to three different parametrizations of the Walecka model with scalar self-interactions.
A.L. Fetter, B.A. Brown, B.D. Serot, B.D. Serot, B.F. Davis, C.J. Horowitz, C.J. Horowitz, C.J. Horowitz, C.J. Horowitz, C.J. Horowitz, D. Vretenar, D.H. Youngblood, D.H. Youngblood, D.H. Youngblood, D.J. Thouless, Frederick M. Walter, G. Colò, G.S. Adams, H.L. Clark, H.M. Müller, H.P. Morsch, J. Piekarewicz, J. Piekarewicz, J. Piekarewicz, J.-P. Blaizot, J.D. Walecka, J.F. Dawson, J.R. Shepard, J.R. Wilson, K. Wehrberger, P. Danielewicz, R.J. Furnstahl, Ronald W. Mayle, S. Nishizaki, S.E. Thorsett, T.D. Poelhekken, T.N. Buti, Zhongyu Ma   +37 more
core   +2 more sources

Computational Electromagnetics: A Miscellany

J, 2021
The paper presents a miscellany of unorthodox and, in some cases, paradoxical or controversial items related to computational and applied electromagnetics.
Igor Tsukerman
doaj   +1 more source

Elimination of spurious modes in full-vectorial finite element method based acoustic modal solution [PDF]

, 2019
Finite element method is a powerful technique for solving a wide range of engineering problems. However, the existence of the spurious solutions in full-vectorial finite element method has been a major problem for both acoustic and optic modal analyses ...
Aamir Gulistan, B. M. A. Rahman, Bahl, Bedoya, Dainese, Dasgupta, Gray, Gulistan, Kang, Konrad, Koshiba, Koshiba, Kumar, Lagasse, Limpert, Littler, M. M. Rahman, Mamdem, Mermelstein, Pant, Rahman, Ramachandran, Schneider, Selleri, Song, Soto, Souvik Ghosh, Sriratanavaree, Sun, Thevenaz, Virally, Winkler, Wolff, Yeniay, Zhang, Zou, Zou   +36 more
core   +1 more source

Lithium Niobate MEMS Antisymmetric Lamb Wave Resonators with Support Structures

Micromachines
The piezoelectric thin film composed of single-crystal lithium niobate (LiNbO3) exhibits a remarkably high electromechanical coupling coefficient and minimal intrinsic losses, making it an optimal material for fabricating bulk acoustic wave resonators ...
Yi Zhang, Yang Jiang, Chuying Tang, Chenkai Deng, Fangzhou Du, Jiaqi He, Qiaoyu Hu, Qing Wang, Hongyu Yu, Zhongrui Wang   +9 more
doaj   +1 more source

An Eigenanalysis Study of Tunable THz and Photonic Unbounded Structures Employing Finite Element Method

IEEE Photonics Journal, 2019
This work aims at the establishment of a rigorous full-wave eigenmode analysis technique based on a finite element scheme for the study of terahertz (THz) or photonic/optical unbounded structures.
Konstantinos D. Paschaloudis, Constantinos L. Zekios, Laura Ghisa, Peter C. Allilomes, Kyriakos E. Zoiros, Ammar Sharaiha, Stavros Iezekiel, George A. Kyriacou   +7 more
doaj   +1 more source

Fermions in the vortex background on a sphere

, 2003
In 5+1 dimensions, we construct a vortex-like solution on a two-dimensional sphere. We study fermionic zero modes in the background of this solution and relate them to the replication of fermion families in the Standard Model.
Frere, J. -M., Libanov, M. V., Nugaev, E. Ya., Troitsky, S. V.   +3 more
core   +3 more sources