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http://dx.doi.org/10.5515/KJKIEES.2017.28.2.147

Criterion to Choose Efficient Far-Field Approximation of Dyadic Green's Function for Impedance Plane like Ocean Surface  

Lee, Hyunsoo (Department of Electronic Engineering, Inha University)
Koh, Il-Suek (Department of Electronic Engineering, Inha University)
Yoon, Jong Suk (ISR R&D Lab., LIG Nex1 Co., Ltd.)
Kim, Tae Hyung (ISR R&D Lab., LIG Nex1 Co., Ltd.)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.2, 2017 , pp. 147-154 More about this Journal
Abstract
The impedance approximation has been widely used to model an earth surface such as ocean surface. In calculation of the dyadic Green's function for the impedance half plane, Sommerfeld integral and its partial derivatives are required. It is known that two far-field approximation of the Sommerfeld integral can be represented in terms of Legendre or Laguerre polynomials. Hence, a criterion is required to choose one of two far-field approximations for a given application, which can be expressed in a complex plane of the surface impedance. Also, we approximate the required partial derivatives of Sommerfeld integral and numerically verify the accuracy of the approximation.
Keywords
Dyadic Green's Function; Impedance Half-Plane; Sommerfeld Integral; Far-Field Approximation;
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