Zobrazeno 1 - 10
of 311
pro vyhledávání: '"Luk, R"'
Autor:
Arnaut, Luk R., Ladbury, John M.
Publikováno v:
IEEE Trans. Electromagn. Compat., 2024
In part I, spectral moments and kurtosis were established as parameters in analytic models of correlation and spectral density functions for dynamic reverberation fields. In this part II, several practical limitations affecting the accuracy of estima
Externí odkaz:
http://arxiv.org/abs/2404.03520
Autor:
Arnaut, Luk R., Ladbury, John M.
Publikováno v:
IEEE Trans. Electromagn. Compat., 2024
Experimental auto- and cross-correlation functions and their corresponding spectral density functions are extracted from measured sweep data of mode-stirred fields. These are compared with theoretical models derived in part I, using estimated spectra
Externí odkaz:
http://arxiv.org/abs/2404.03497
Autor:
Arnaut, Luk R.
Auto- and cross-spectral density functions for dynamic {random} fields and power are derived. These are based on first- and second-order Pad\'{e} approximants of correlation functions expanded in terms of spectral moments. The second-order approximan
Externí odkaz:
http://arxiv.org/abs/2404.02347
Autor:
Arnaut, Luk R.
The standard deviations of the energy and Poynting power densities for an isotropic random field near a perfectly conducting planar boundary are characterized, based on quartic plane-wave expansions. For normal and transverse components, different ra
Externí odkaz:
http://arxiv.org/abs/2112.05292
Autor:
Arnaut, Luk R.
Probability distributions and densities are derived for the excess and deficiency of the intensity or instantaneous energy (quasi-static power) associated with a $p$-dimensional random vector field. Explicit expressions for the exact distributions ar
Externí odkaz:
http://arxiv.org/abs/2108.11488
Autor:
Arnaut, Luk R.
The excess power, energy and intensity of a random electromagnetic field above a high threshold level are characterized based on a Slepian--Kac model for upcrossings. For quasi-static fields, the probability distribution of the excess intensity in it
Externí odkaz:
http://arxiv.org/abs/2012.06038
Autor:
Arnaut, Luk R., Gradoni, Gabriele
Publikováno v:
IEEE Trans. Electromagn. Compat., 2019
The effect of a perfectly conducting planar boundary on the average linear momentum (LM), angular (momentum (AM), and power of a time-harmonic statistically isotropic random field is analyzed. These averages are purely imaginary and their magnitude d
Externí odkaz:
http://arxiv.org/abs/1907.09304
An original experimental method for determining the empirical probability distribution function (PDF) of the quality factor (Q) of a mode-stirred reverberation chamber is presented. Spectral averaging of S-parameters across a relatively narrow freque
Externí odkaz:
http://arxiv.org/abs/1401.4030
Autor:
Grinsztejn, B, Mugyenyi, PN, Collier, A, Salata, R, Godfrey, C, Hogg, E, Hughes, M, Ritz, J, Wieclaw, L, Sise, T, Mellors, JW, Wallis, C, Fletcher, CV, Gandhi, M, Gross, R, Schooley, RT, Walensky, R, van Schalkwyk, M, Faesen, S, Mngqibisa, R, Valencia, J, Montalban, E, Kumarasamy, N, Kanyama, C, Cardoso, SW, Santos, BR, Mansfield, B, Mugerwa, H, Ndege, BW, Secours, R, Samaneka, W, Kadam, D, Mave, V, Makanga, M, Fontain, SN, Sugandhavesa, P, Avihingsanon, A, Nakibuuka, L, Nassolo, H, Anthony, P, Kulkarni, V, Nsubuga, M, van Wyk, J, Rooney, J, van Delft, Y, Leavitt, R, Luk, R, Benns, A, Hovind, L, Shahkolahi, A, Grinsztejn, Beatriz, Hughes, Michael D, Ritz, Justin, Salata, Robert, Mugyenyi, Peter, Hogg, Evelyn, Wieclaw, Linda, Gross, Robert, Godfrey, Catherine, Cardoso, Sandra W, Bukuru, Aggrey, Makanga, Mumbi, Faesen, Sharlaa, Mave, Vidya, Wangari Ndege, Beatrice, Nerette Fontain, Sandy, Samaneka, Wadzanai, Secours, Rode, van Schalkwyk, Marije, Mngqibisa, Rosie, Mohapi, Lerato, Valencia, Javier, Sugandhavesa, Patcharaphan, Montalban, Esmelda, Avihingsanon, Anchalee, Santos, Breno R, Kumarasamy, Nagalingeswaran, Kanyama, Cecilia, Schooley, Robert T, Mellors, John W, Wallis, Carole L, Collier, Ann C
Publikováno v:
In The Lancet HIV September 2019 6(9):e588-e600
Autor:
Arnaut, Luk R.
We derive an integral expression for the plane-wave expansion of the time-varying (nonstationary) random field inside a mode-stirred reverberation chamber. It is shown that this expansion is a so-called oscillatory process, whose kernel can be expres
Externí odkaz:
http://arxiv.org/abs/1004.2268