Electromagnetic Field Analysis of an Electric Dipole Antenna Based on a Surface Integral Equation in Multilayered Dissipative Media

Abstract

Abstract:In this paper, a novel method based on the Poggio-Miller-Chang-Harrington-Wu-Tsai (PMCHWT) integral equation is presented to study the electromagnetic fields excited by vertical or horizontal electric dipoles in the presence of a layered region which consists of K-layered dissipative media and the air above. To transform the continuous integral equation into a block tridiagonal matrix with the feature of convenient solution, the Rao-Wilton-Glisson (RWG) functions are introduced as expansion and testing functions. The electromagnetic fields excited by an electric dipole are calculated and compared with the available results, where the electric dipole antenna is buried in the non-planar air-sea-seabed, air-rock-earth-mine, and multilayered sphere structures. The analysis and computations demonstrate that the method exhibits high accuracy and solving performance in the near field propagation region.

Effects of Different Magnetically Treated Waters on Emergence and Growth of Snail Medic

“…However, irrigating tomato by 100% fresh water had the highest values, while using of 100% agricultural drainage water displayed the lowest values. Also, Xu et al (2017) and studied the role of magnetic treatment of saline water on seed germination of potato and corn crop. Their results showed that seedling germination rate is considerably increased with the use of magnetic-treated saline water (EC = 4 ds m -1 ).…”

A non-singular, field-only surface integral method for interactions between electric and magnetic dipoles and nano-structures

“…In order to use a volume based method to study the interaction between dipoles and objects, such as the finite element method (FEM), special attention is needed to handle the mesh in the domain around a dipole and how the mesh evolves to the surrounding space [15]. Concerning surface based methods, the most popular one is the method of moments (MoM) [16] which was traditionally used to calculate the electromagnetic field of an electric dipole antenna for applications in Through-the-Earth communication. MoM can calculate the far field, but in spite of its popularity, performs much less accurate when accessing the near field or the surface field due to the congenital hypersingularies of this method.…”