نتایج جستجو برای: cylindrical antenna
تعداد نتایج: 69834 فیلتر نتایج به سال:
This paper introduces a moment-method formulation, which is capable of accurately modeling moderately thick cylindrical wire antennas. New algorithms are presented for the efficient computation of the cylindrical wire kernel and related impedance matrix integrals. These algorithms make use of exact series representations as well as efficient numerical procedures and lead to a significant reduct...
The wall admittance of an arbitrarily shaped microstrip antenna is generally formulated. As examples, elliptical microstrip antennas with and without a circular slot are calculated. The wall admittance is determined by the spectral domain analysis in order to consider the effect of the dielectric substrate. The electromagnetic fields within the cavity are expanded in terms of the eigenfunctions...
M. S. A. S. Rizk and G. Moms, “New class of broadband hybrid mode horn,” presented at Inst. Elec. Eng. Colloquium on Antenna Bandwidth Extension Techniques, London, Oct. 28, 1985. H. C. Minnett and B. MacA. Thomas, “A method of synthesizing radiation patterns with axial symmetry,” IEEE Trans. Antennas Propagat., vol. AP-14, pp. 654-636, Sept. 1966. N. Marcuvitz, Waveguide Handbook. New York...
the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...
Abstract—In this paper, a fast and efficient method based on MOM is proposed for the analysis of antenna and array mounted on bodies of revolution. An attachment mode is introduced to ensure the continuity of current density at the junction region between wire antenna and cylindrical surface. A method based on suitable changes of coordinates and domains is presented to extract singular point of...
Light scattering from an array of aligned multiwall carbon nanotubes (MWCNTs) has previously been investigated, and shown to be consistent with that from an array of antennae. Two basic antenna effects have been demonstrated: 1) the polarization effect, which suppresses the response of an antenna when the electric field of the incoming radiation is polarized perpendicular to the dipole antenna ...
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