Bilayers comprising two matched layers of dielectric thin-( ) film helicoidal bianisotropic mediums TFHBMs with opposite structural handedness can be designed to almost perfectly reflect arbitrarily polarized normally incident plane wa¨es at certain frequencies. TFHBM bilayers can therefore ser¨e as
Efficient FDTD analysis of discontinuities in a square coaxial waveguide
β Scribed by Enrique A. Navarro; Chen Wu; Paul Y. Chung; John Litva
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 570 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
β¦ Synopsis
The finite-difference-time-domain (FDTD) method is applied to model some discontinuities that are present in C-band beam-foming networks.
In particular, a branch line coupler, a phase shifter, and a slope equalizer are modeled. A FDTD algorithm, which makes use of nonunifom grids and a synthetic excitation, giiles good results and saves computer resources. We achieve an efficient algorithm for analyzing BFN structures on a personal computer. Numerical results are given for the scattering parameters of three devices in 3.4-4.2-GHz band.
π SIMILAR VOLUMES
A simple and effecti¨e method is gi¨en for the accurate extraction of the reflection coefficient in a discontinuity simulation of the rectangular wa¨eguide by FDTD. It uses only the ¨alues of Ex-field on
The method of integral equations is used for solving the problem of electromagnetic wave diffraction by an inclined dividing boundary between two dielectric media and by dielectric inserts with such boundaries in rectangular waveguides. Characteristics of the numerical algorithms are described and p
## Abstract A combined approach of the finiteβelement and boundaryβelement methods is formulated for the analysis of arbitrarily shaped discontinuities in a grounded slab waveguide. In this approach, the discontinuity region is divided into two regions. One is a finite region with arbitrary inhomog
A novel analysis to compute the admittance characteristics of the slots cut in ( ) the narrow wall of a rectangular waveguide also called edge slot is presented. The slot aperture field is expanded in terms of entire domain sinusoidal basis functions and is solved using Galerkin's method. The comput
good agreement is achieved. Comparisons of the dispersion characteristics with those of hollow, partially filled, and fully filled dielectric waveguides are also considered, and several interesting remarks are given. lNTRODuCTl0~ ## James p. 430j has pointed out that ''there is a lack of readily