1,853 research outputs found
NEW TYPES OF TEM CELLS WITH SHAPED INNER AND OUTER CONDUCTORS
No full textNumerical algorithms are utilized to design nontraditional transversal sections of TEM cells, leading to large areas of almost uniform electric field within small dimensions. Numerical inversion of the Schwarz-Christoffel formula and predictor-corrector mapping of equipotential lines are utilized. (C) 1994 John Wiley & Sons, Inc
CONDUCTOR-BACKED AND UPPERSHIELDED COPLANAR WAVE-GUIDE WITH FINITE GROUND PLANES
No full textA variational procedure is proposed to accurately analyze the electrical quasi-TEM parameters of coplanar waveguides, taking into account finite-extent as well as semiinfinite lateral ground planes. The procedure leads to accurate calculations and allows comparison with results already presented for coplanar waveguides. Data for geometries incompletely analyzed in the technical literature are provided. (C) 1993 John Wiley & Sons, Inc
AN ANALYTIC ALGORITHM FOR UNBALANCED STRIPLINE IMPEDANCE - COMMENTS
No full textSome new results related to characteristic impedances of undercut lines are presented considering various line geometries
A neural inverse problem approach for optimal design
No full textAn original approach to the optimization of electromagnetic structures is presented that makes use of a neural network trained to capture the functional relationship between the design parameters and the objective function. The algebraic structure of the network is used to find the basins of attraction of the objective function of the optimization problem, avoiding the major drawbacks of the commonly used algorithms, i.e., the entrapment in local minima, and/or the huge amount of cost function evaluations
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