THE MULTILEVEL FAST PHYSICAL OPTICS METHOD FOR CALCULATING HIGH FREQUENCY SCATTERED FIELDS

High-Frequency Solution for Scattered Fields by Cylindrically Curved Conducting Surface

1. INTRODUCTION Recently, the studies on the scattering of electromagnetic waves by a cylindrically curved conducting open surface are becoming an important subject for a variety of applications [1]-[4]. When the geometrical ray or the creeping wave is incident on the edge of the cylindrically curved conducting open surface, the geometrical rays and the whispering gallery modes, which cling to ...

High Frequency Transformer Isolated Quasi Z-Source Cascade Multilevel Inverter

In this paper, a new structure of HFTI-qZS-CMI has been proposed. The proposed structure is capable of generating high-voltage for medium to high power applications. By adding a switch, a capacitor and a high-frequency transformer and also eliminating an inductor from each qZS-CMI cell, the HFTI-qZS-CMI structure will be created. Using the high-frequency transformer in the proposed structure, l...

Fast Method for High-frequency Acoustic Scattering from Random Scatterers

This paper is concerned with the uncertainty quantification of high-frequency acoustic scattering from objects with random shape in two-dimensional space. Several new methods are introduced to efficiently estimate the mean and variance of the random radar cross section in all directions. In the physical domain, the scattering problem is solved using the boundary integral formulation and Nyström...

Computing High-Frequency Scattered Fields by Beam Propagation Methods: A Prospective Study

Xavier ANTOINE, Yuexia HUANG, Ya Yan LU Institut Elie Cartan Nancy (IECN), Nancy-Université, CNRS, INRIA Corida Team, Boulevard des Aiguillettes, B.P. 239 F-54506, Vandoeuvre-lés-Nancy Cedex, France. Email: [email protected] Department of Mathematics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong. Department of Mathematics, City University of Hong Kong, Tat Chee...

High Frequency Techniques: the Physical Optics Approximation and the Modified Equivalent Current Approximation (MECA)