[PDF][PDF] Integrals with coalescing saddles.

MV Berry, CJ Howls - 2010 - researchgate.net
The main functions covered in this chapter are cuspoid catastrophes ΦK (t; x); umbilic
catastrophes with codimension three Φ (E)(s, t; x), Φ (H)(s, t; x); canonical integrals ΨK (x), Ψ …

Second-order electromagnetic eigenfrequencies of a triaxial ellipsoid

JB Mehl - Metrologia, 2009 - iopscience.iop.org
The dependence of the eigenvalues of the TM1n and TE1n electromagnetic triplet modes on
the shape of a triaxial ellipsoid cavity resonator is investigated. For an ellipsoid with semi …

Electromagnetic scattering by an inhomogeneous gyroelectric sphere using volume integral equation and orthogonal Dini-type basis functions

GP Zouros, GC Kokkorakis - IEEE Transactions on Antennas …, 2015 - ieeexplore.ieee.org
The electromagnetic scattering by an inhomogeneous gyroelectric sphere is studied in this
work. The solution is constructed using the well-known electric field volume integral …

A Local Point Method Based on DFS Expansion of Boundary Conditions for Eigenfrequencies Calculation of BoR Cavities

IN Volovichev, GP Zouros… - IEEE Transactions …, 2023 - ieeexplore.ieee.org
We have developed a local point method (LPM) to calculate the eigenfrequencies of perfect
electric conducting (PEC) body of revolution (BoR) cavities, with or without a spherical …

Second-order electromagnetic eigenfrequencies of a triaxial ellipsoid II

JB Mehl - Metrologia, 2015 - iopscience.iop.org
Finite-element calculations of electromagnetic eigenvalues are known to converge to the
exact solutions in the limit of vanishing element sizes. In an extension of previous work …

Electromagnetic scattering from a metallic prolate or oblate spheroid using asymptotic expansions on spheroidal eigenvectors

GP Zouros, AD Kotsis… - IEEE Transactions on …, 2013 - ieeexplore.ieee.org
The electromagnetic scattering of a plane wave by a metallic spheroid is considered in this
work. The solution is obtained using two alternative methods: the first method is based on …

Efficient calculation of the electromagnetic scattering by lossless or lossy, prolate or oblate dielectric spheroids

GP Zouros, AD Kotsis… - IEEE Transactions on …, 2015 - ieeexplore.ieee.org
In this paper, we study the electromagnetic scattering of a plane wave by a prolate or oblate
dielectric spheroid, which can be lossless or lossy. The presented efficient solution is …

Asymptotic behavior of Heun function and its integral formalism

YS Choun - arXiv preprint arXiv:1303.0876, 2013 - arxiv.org
The Heun function generalizes all well-known special functions such as Spheroidal Wave,
Lame, Mathieu, and hypergeometric functions. Heun functions are applicable to diverse …

Closed-form eigenfrequencies in prolate spheroidal conducting cavity

LW Li, ZC Li, MS Leong - IEEE transactions on microwave …, 2003 - ieeexplore.ieee.org
In this paper, an efficient approach is proposed to analyze the interior boundary-value
problem in a spheroidal cavity with perfectly conducting wall. Since the vector wave …

The electromagnetic fields of a triaxial ellipsoid calculated by modal superposition

G Edwards, R Underwood - Metrologia, 2011 - iopscience.iop.org
The electromagnetic fields and eigen-frequencies of triaxially ellipsoidal resonators have
been calculated. The method used is modal superposition, based on the decomposition of …