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Using split-step fourier transform method solving parabolic equation is an effective method for predicting radiowave propagation above earth surface. In this paper the backward difference is adopted to improve the discrete mixed fourier transform algorithm, shift map method is also introduced to consider irregular terrains. Radiowave propagation is then predicted under vacuum and non-vacuum air conditions...
In this paper, we investigate the near field Orbital Angular Momentum (OAM) using the rigorous numerical methods. To model the communication channel of the OAM system, we derived a rigorous channel matrix for the near field transmitter/receiver system. This channel matrix is composed of the admittance matrices of the system. To obtain these admittance matrices, the integral equation method is employed...
Constructing parabolic wave equation model, with the algorithm of discrete mixed Fourier transform, has become the mainstream approach to describe the atmospheric duct. To determine the absorption layer top boundary of parabolic equation is the significant step of the step calculation process. This paper discusses on the relevant problems about setting window function for absorption boundary. Firstly,...
In this paper, a new modeling procedure for the integral equation-based non-overlapping domain decomposition method (IE-NDDM) is proposed. First the integral equation is established on the entire PEC surface, then the entire surface is partitioned into some non-overlapping open-surfaces (called subdomains). The RWG basis functions are used to expand the equivalent surface electric current on the entire...
In this paper, a hybrid domain decomposition method with electric and magnetic current combined-field integral equation (JMCFIE) is present for modeling electromagnetic scattering problems involving composite structures. The method first decomposes the original problem into several sub-domains according to its geometry and dielectric parameters. JMCFIE serves as the sub-domain solver in which a well-posed...
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