A SPECTRAL-DOMAIN METHOD FOR MULTIPLE-SCATTERING IN CONTINUOUS RANDOMLY IRREGULAR MEDIA

被引：10
作者：
RINO, CL
机构：
[1] Vista Research Inc, Mountain View,, CA, USA
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 1988年 / 36卷 / 08期
关键词：
MATHEMATICAL TECHNIQUES -- Integral Equations - SPECTRUM ANALYSIS;
D O I：
10.1109/8.7224
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A spectral-domain method for computing the first- and second-order moments of a scalar wavefield propagating in a continuous randomly irregular medium is described. The scattering is characterized by the moments of incremental forward and backward scattering functions. Approximate forms for these moments are given in terms of the spectral density function of the relative permittivity fluctuations. Solutions are developed for incident plane and spherical waves. Well-known results that are usually derived from the parabolic wave equation using the Markov approximation are easily recovered from the general solutions. The results show that backscatter enhancements depend on the correlation between the forward and backward scattered waves. Computations are performed to illustrate the effects of backscatter on VHF transionospheric radiowaves.
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页码：1114 / 1128
页数：15
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