In this paper, we present and investigate the analytical properties of a new set of orthogonal basisfunctions derived from the block-pulse functions. Also, we present a numerical method based on this new class of fun...
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In this paper, we present and investigate the analytical properties of a new set of orthogonal basisfunctions derived from the block-pulse functions. Also, we present a numerical method based on this new class of functions to solve nonlinear Volterra-Fredholm integral equations. In particular, an alternative and efficient method based on the formalism of artificial neural networks is discussed. The efficiency of the mentioned approach is theoretically justified and illustrated through several qualitative and quantitative examples.
The effects of the uniaxial anisotropy and chirality of the superstrate on the resonant frequency and bandwidth of rectangular microstrip patch in a substrate-superstrate configuration are investigated. The theoretica...
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The effects of the uniaxial anisotropy and chirality of the superstrate on the resonant frequency and bandwidth of rectangular microstrip patch in a substrate-superstrate configuration are investigated. The theoretical study is rigorously formulated via the integral equation and solved using Galerkin's moment method. The complex resonant frequency for the TM(01) mode is studied using sinusoidal basis functions. The effects of the uniaxial anisotropic permittivity on the resonant frequency of a monolayer have been studied by many authors. Recently the same resonator antenna with a uniaxial permeability and chiral substrate has been studied by the authors, and it was found that these elements enhance the antenna characteristics. Some researchers have suggested the use of an anisotropic superstrate to improve the characteristics of the antenna. Therefore the aim of this work is focused on the effects of a superstrate having uniaxial electric, uniaxial magnetic anisotropies, and chirality elements on the resonant frequency and the bandwidth of the rectangular microstrip antenna.
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