Title :
Convergence analysis of integral equations for characterization of RF channels
Author :
De Castro, Sérgio A A ; Moreira, Fernando J S
Author_Institution :
Dept. of Electron. Eng., Fed. Univ. of Minas Gerais, Brazil
Abstract :
The main concern of the present work is to investigate the convergence of the electric and magnetic field integral equations (EFIE and MFIE) adopted in the characterization of radio wave propagation over irregular terrains. The terrain irregularities are smooth, such that back-scattering is neglected and a recursive technique is used to determine the equivalent currents. Due to the near-grazing incidence and the vertical polarization of the incident field, the terrain can be considered an open surface made of a perfect magnetic conductor. This approach leads toward an equivalent problem that, in principle, can not be solved by the EFIE, a fact apparently overlooked in the literature. This may explain why the MFIE provides accurate results with a smaller number of basis functions than the EFIE.
Keywords :
backscatter; conducting bodies; convergence of numerical methods; electric field integral equations; electromagnetic wave polarisation; magnetic field integral equations; radiowave propagation; wireless channels; EFIE; MFIE; RF channels; back-scattering; electric field integral equations; magnetic field integral equations; perfect magnetic conductor; radio wave propagation; vertical polarization; Conductors; Convergence; Digital video broadcasting; Integral equations; Magnetic analysis; Magnetic fields; Polarization; Radio frequency; Scattering; Wireless communication;
Conference_Titel :
Microwave and Optoelectronics, 2005 SBMO/IEEE MTT-S International Conference on
Print_ISBN :
0-7803-9341-4
DOI :
10.1109/IMOC.2005.1579995