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IEEE Transactions on Antennas and Propagation
Volume 47 Number 8, August 1999

Table of Contents for this issue

Complete paper in PDF format

Finite-Element Analysis of Complex Axisymmetric Radiating Structures

Andrew D. Greenwood, Member, IEEE and Jian-Ming Jin, Senior Member, IEEE

Page 1260.

Abstract:

A finite-element method (FEM) is developed for the analysis of complex axisymmetric radiating structures. The method is based on the electric field formulation with the transverse field expanded in terms of edge-based vector basis functions and the azimuth component expanded using nodal-based scalar basis functions. This mixed representation of the electric field eliminates spurious solutions and permits an easy treatment of boundary conditions on conducting surfaces as well as across material interfaces. The FEM mesh is truncated using a recently developed cylindrical perfectly matched layer (PML). The method has been successfully applied to three radiating structures: a corrugated horn antenna, a spherical Luneburg lens, and a half Maxwell fish eye. Numerical results are presented to show the validity, accuracy, and efficiency of the method.

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