Home  About us  Contact
 

Parallel-plate Waveguide (parallel-plate + waveguide)

Distribution by Scientific Domains
Engineering100%

Selected Abstracts

Numerical analysis of sleeve monopole in parallel-plate waveguide

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 2 2001
Zhi Ning Chen
Abstract A monopole with double sleeves, which consists of a resonant loading and a conventional sleeve monopole, is experimentally investigated. The loaded monopole is put vertically in a parallel-plate waveguide and driven by a coaxial feeder. The new structure exhibits a remarkably broad impedance bandwidth. In this paper, a modal expansion technique is used to numerically evaluate the impedance characteristics of the monopole by modeling the fields between the plates using cylindrical harmonic functions. A Fourier least-square integration is applied to finding the expansion coefficients by the boundary and continuity conditions. Prior to modeling the proposed sleeve monopole, the developed analysis scheme is examined for its convergence and accuracy. Calculated results are validated by the measurements. For the optimum design at 5.8 Ghz, we investigate the effects of the structure parameters on the impedance characteristics. © 2001 John Wiley & Sons, Inc. Int J RF and Microwave CAE 11: 86,98, 2001. [source]

An efficient iterative method for analysis of a substrate integrated waveguide structures

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 1 2010
Hassen Zairi
Abstract The article presents an efficient method for characterization of substrate integrated waveguide structures. Substrate integrated circuits are considered as an ensemble of conducting vias placed in a parallel-plate waveguide. The analysis is based on the wave concept formulation and the iterative resolution of two relationships between incident and reflected volume-waves. The reflection operator is expressed using Hankel functions and computed by considering the scattering from the ensemble of conducting posts. Numerical results have been obtained for substrate integrated waveguide (SIW) structures already presented in literature. Simulations obtained are compared with recent published results. A good agreement is achieved together with significant improvements both in computational time and memory requirements. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 45,48, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24825 [source]

Coaxially fed monopoles in shorted waveguides

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 12 2007
Mi Y. Park
Abstract An efficient series solution for coaxially fed monopoles in a shorted parallel-plate waveguide is presented. The analysis is based on mode-matching and image method. A coaxially fed monopole in a shorted rectangular waveguide is considered as a special case. Computations are performed to verify the validity of solution. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 3145,3148, 2007; Published online in Wiley Inter-Science (www.interscience.wiley.com). DOI 10.1002/mop.22959 [source]

New iterative equations for an E -plane T-junction in a parallel-plate waveguide using Green's function

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 6 2003
Yong H. Cho
Abstract Reflection and transmission behaviors of an E-plane T-junction in a parallel-plate waveguide are theoretically investigated. Green's function and the iterative procedure are used to obtain the iterative equations for the Hz field modal coefficients. Numerical computations illustrate the characteristics of reflection and transmission powers in terms of frequency. A dominant-mode solution is presented and compared with higher-mode solutions. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 37: 447,449, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10945 [source]

A full-wave space-domain method for the analysis of leaky-wave modes in multilayered planar open parallel-plate waveguides

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 1 2005
José Luis Gómez-Tornero
Abstract This work presents a novel numerical technique for the analysis of leaky-wave modes in laterally shielded, top-open multilayered planar transmission lines. The method develops the multilayered-media boxed Green's functions for this type of electromagnetic devices, and solves the characteristic electric-field integral equation (EFIE) by using the method of moments (MoM). The analytical expressions used for the computation of the kernel of this technique are derived in this article, and results for leaky-wave modes in different practical structures are presented. The strong analytical nature of the proposed approach allows for a low-cost computational code without losing its full-wave accuracy. Comparisons with previous works are presented, showing the advantages of this new method for the analysis and design of practical millimeter-band leaky-wave antennas. © 2004 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2005. [source]