New insight into the classical Macdonald physical optics approximation

被引：67
作者：
Ufimtsev, Pyotr Ya. [1 ,2 ,3 ]
机构：
[1] Acad Sci Moscow, Inst Radio Engn & Elect, Moscow Aviat Inst, Moscow, Russia
[2] Univ Calif Los Angeles, Los Angeles, CA 90024 USA
[3] Moscow MV Lomonosov State Univ, Moscow, Russia
来源：
IEEE ANTENNAS AND PROPAGATION MAGAZINE | 2008年 / 50卷 / 03期
关键词：
physical optics; physical theory of diffraction; Fresnel diffraction; shadow radiation; forward scattering; acoustic scattering; electromagnetic scattering;
D O I：
10.1109/MAP.2008.4563560
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：
The Physical Optics approximation is widely used in analysis of antennas and scattering problems for electromagnetic and acoustic waves. The present paper investigates the nature of this classical approximation. It is shown that the scattered field in this approximation can be separated into two parts: the reflected field, containing all reflected rays and beams, and the shadow radiation, responsible for the Fresnel diffraction and the forward scattering. This observation elucidates the physics behind the fundamental diffraction law related to the total power scattered by large reflecting objects. It also clarifies the diffraction limit for reduction of scattering by absorbing materials.
引用
收藏
页码：11 / 20
页数：10
相关论文
共 35 条
[21]  
Pierce A. D., 1994, Acoustics: An Introduction to Its Physical Principles and Applications
[22]  
Rubinowicz A, 1917, ANN PHYS-BERLIN, V53, P257
[23]  
Ruck G. T., 1970, RADAR CROSS SECTION, V2
[24]  
RUCK GT, 1970, RADAR CROSS SECTION, V1
[25]  
SOMMERFELD A, 1961, DIFFERENTIAL INTEGRA, V2, pCH20
[26]  
SOMMERFELD A., 1896, Math. Ann, V47, P317, DOI DOI 10.1007/BF01447273
[27]  
Ufimtsev P.Y., 2007, FUNDAMENTALS PHYS TH
[28]  
Ufimtsev P.Y., 1999, BACKSCATTER
[29]  
Ufimtsev P. Ya., 1990, Soviet Journal of Communications Technology & Electronics, V35, P108
[30]  
Ufimtsev P. Ya., 1965, RADIO ENG ELEC PHYS, V10, P866
1234