Author :
Publisher :
Page : 28 pages
File Size : 10,19 MB
Release : 1996
Category : Boundary element methods
ISBN :
Author :
Publisher :
Page : 28 pages
File Size : 45,24 MB
Release : 1995
Category :
ISBN :
Author : National Aeronautics and Space Administration NASA
Publisher :
Page : 24 pages
File Size : 12,72 MB
Release : 2018-10-24
Category :
ISBN : 9781729169933
Radiation pattern prediction analysis of elliptically polarized cavity backed aperture antennas in a finite ground plane is carried out using a combined finite element method (FEM)/method of moments (MoM)/geometrical theory of diffraction (GTD) technique. The magnetic current on the cavity-backed aperture in an infinite ground plane is calculated using the combined FEM/MoM analysis. GTD, including the slope diffraction contribution, is used to calculate the diffracted fields due to both soft and hard polarizations at the edges of the finite ground plane. Numerical results for the radiation patterns of a cavity backed circular spiral microstrip patch antenna excited by a coaxial probe in a finite rectangular ground plane are computed and compared with experimental results. Reddy, C. J. and Deshpande, M. D. and Fralick, D. T. Unspecified Center NAS1-19935; RTOP 505-64-70-01...
Author : National Aeronautics and Space Adm Nasa
Publisher :
Page : 26 pages
File Size : 32,44 MB
Release : 2018-10-23
Category :
ISBN : 9781729116203
Radiation pattern prediction analysis of elliptically polarized cavity-backed aperture antennas in a finite ground plane is performed using a combined Finite Element Method/Method of Moments/Geometrical Theory of Diffraction (FEM/MoM/GTD) technique. The magnetic current on the cavity-backed aperture in an infinite ground plane is calculated using the combined FEM/MoM analysis. GTD, including the slope diffraction contribution, is used to calculate the diffracted fields caused by both soft and hard polarizations at the edges of the finite ground plane. Explicit expressions for regular diffraction coefficients and slope diffraction coefficients are presented. The slope of the incident magnetic field at the diffraction points is derived and analytical expressions are presented. Numerical results for the radiation patterns of a cavity-backed circular spiral microstrip patch antenna excited by a coaxial probe in a finite rectangular ground plane are computed and compared with experimental results. Reddy, C. J. and Deshpande, M. D. and Fralick, D. T. and Cockrell, C. R. and Beck, F. B. Langley Research Center RTOP 505-64-52-04...
Author : D. J. Kozakoff
Publisher : Artech House
Page : 319 pages
File Size : 34,49 MB
Release : 2010
Category : Technology & Engineering
ISBN : 1596934425
A radome is a structural, weatherproof enclosure that protects microwave and radar antenna from ice, freezing rain, wind, and debris. This new, updated edition to an Artech House classic provides a current, comprehensive overview of the design and analysis of radomes. The second edition includes a wealth of new material, including three new chapters on radome measurement techniques, environmental effects on radomes, and new radome technology. This unique book helps professionals to design radomes for top performance, understand the effect a radome has on a particular antenna's operation, and become knowledgeable about how to specify acceptable radome equipment. Over 130 illustrations and more than 250 equations support key topics throughout the book. CD-ROM Included! Includes powerful codes and highly useful tools that help professionals estimate the electrical performance degradation that may occur when an antenna system is enclosed by a radome.
Author :
Publisher :
Page : 176 pages
File Size : 11,99 MB
Release : 1996
Category : Aeronautics
ISBN :
Author :
Publisher :
Page : 998 pages
File Size : 28,41 MB
Release : 1996-07
Category : Government publications
ISBN :
Author :
Publisher :
Page : 292 pages
File Size : 29,36 MB
Release : 1996
Category : Radio meteorology
ISBN :
Author :
Publisher :
Page : 172 pages
File Size : 38,89 MB
Release : 1996
Category : Astronautics
ISBN :
This document is a compilation of the scientific and technical information that the Langley Research Center has produced during the calendar year 1995. Included are citations for formal reports, high-numbered conference publications, high-numbered technical memorandums, contractor reports, journal articles and other publications, meeting presentations, technical talks, computer programs, tech briefs, and patents.
Author :
Publisher :
Page : 660 pages
File Size : 40,31 MB
Release : 1996
Category : Science
ISBN :
