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报告人：Wood Aihua教授
美国空军理工学院
报告题目：Topics on electromagnetic scattering from cavities
报告时间：2012年12月31日(星期一 ) 上午8:40
报告地点：实验楼105
报告摘要：The analysis of the
electromagnetic scattering phenomenon induced by cavities embedded
in an infinite ground plane is of high interest to the engineering
community. Applications include the design of cavity-backed
conformal antennas for civil and military use, the characterization
of radar cross section (RCS) of vehicles with grooves, and
the
advancement of automatic target recognition. Due to the wide
range of applications and the challenge of solutions, the problem
has been the focus of much mathematical research in recent
years.
This talk will provide a survey of
mathematical research in this area. In addition I
will describe the underlining mathematical formulation for this
framework.
Specifically, one seeks to determine the fields scattered by a
cavity upon a
given incident wave. The general way of approach involves
decomposing the entire
solution domain to two sub-domains via an artificial boundary
enclosing the
cavity: the infinite upper half plane over the infinite ground
plane exterior to
the boundary, and the cavity plus the interior region. The problem
is solved
exactly in the infinite sub-domain, while the other is solved
numerically. The
two regions are then coupled over the artificial boundary via the
introduction
of a boundary operator exploiting the field continuity over
material interfaces.
We will touch on both the Perfect Electric Conducting and Impedance
ground
planes. Results of numerical implementations will be presented.