Download or read book An Experimental Investigation of Coupled Antennas in an Inhomogeneous Medium written by Thomas Tameo Sugimoto and published by . This book was released on 1970 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Study of Coupled Linear Antennas in an Inhomogeneous Dissipative Medium written by Thomas Sugimoto and published by . This book was released on 1970 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of a pair of coupled linear antennas in an inhomogeneous dissipative medium was made. The medium was obtained by diffusing a water solution of NaCl into a large block of agar agar gel contained in a wooden tank. The relative dielectric constant was approximately 78 while the loss tangent could be varied from 0.13 to 3.0 at 114 MHz, the frequency used throughout the investigation. Driving point admittances and current distributions were measured with the medium inhomogeneity oriented parallel to the axes of the antennas. Self and mutual input admittances were measured as a function of the antenna length (beta h = 0.3 to 2 pi in steps of 0.1). Symmetric and antisymmetric current distributions were measured for four different antenna lengths (h/lambda = 0.25, 0.50, 0.75, and 1.0). Each measurement was repeated for three antenna separations (beta/lambda = 0.125, 0.25, and 0.50). Self and mutual driving-point admittances were measured as a function of base separation (b/lambda = 0.25 to 1.5 in steps of 0.125) for four antenna lengths (h/lambda = 0.25, 0.50, 0.75, and 1.0) with the medium inhomogeneity direction perpendicular to the antenna axes. Also studies were the effects of a medium discontinuity at the input, nonidentical elements, and input aperture size on the measured input admittance. (Author).

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography with Abstracts of AFCRL Publications from 1 January to 31 March 1971 written by and published by . This book was released on 1971 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Electromagnetic Radiation and Antennas A Summarizing Review written by and published by . This book was released on 1972 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research studies on electromagnetic radiation and antennas are summarized for the period beginning November 1, 1967 and ending October 31, 1972. Brief reviews are given of work on antenna arrays, electrically thick antennas, modified dipole antennas, the end correction for monopole antennas, antennas in different media, and scattering from finite cylinders and imperfectly conducting spheres. (Author).

Download or read book Progress Report written by Harvard University. Division of Engineering and Applied Physics and published by . This book was released on 1971 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Study of Coupled Thick Antennas written by Bob M. Duff and published by . This book was released on 1971 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of an experimental study of two identical, parallel, nonstaggered thick antennas are presented in this report. The term 'thick antenna' means a cylindrical dipole whose radius is significant compared to the free space wavelength of the exciting signal. Three thicknesses of antenna were used in the experiment: ka = 0.318, 0.639, and 0.877. Measurements were made of the apparent input admittance for both symmetric and antisymmetric drive, from which apparent self- and mutual admittances were computed. Both axial and transverse components of the current on the surface of the antennas were measured as functions of the cylindrical coordinates phi and z associated with the antenna. A complete description is given of the experimental system including the design of the antenna system, the arrangement for driving the antennas, a description of the measuring system, and a discussion of some of the problems encountered in carrying out the measurements. The variations of self- and mutual admittance as a function of spacing between antennas is shown with comparison to the behavior of thin antennas. Available theoretical results for the current distribution on coupled thick antennas are compared with the measured current distributions. (Author).

Download or read book Antennas in Inhomogeneous Media written by Janis Galejs and published by Elsevier. This book was released on 2013-10-22 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antennas in Inhomogeneous Media details the methods of analyzing antennas in such inhomogeneous media. The title covers the complex geometrical configurations along with its variational formulations. The coverage of the text includes various conditions the antennas are subjected to, such as antennas in the interface between two media; antennas in compressible isotropic plasma; and linear antennas in a magnetoionic medium. The selection also covers insulated loops in lossy media; slot antennas with a stratified dielectric or isotropic plasma layers; and cavity-backed slot antennas. The book will be of great use to electrical, communications, and radio engineers.

Download or read book An Experimental Investigation of Various Kinds of Antenna Coupling written by Roy Carl Fosberg and published by . This book was released on 1929 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1973 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theoretical and Experimental Investigations on Coupled Antennas in Homogeneous Isotropic Media written by Larry D. Scott and published by . This book was released on 1973 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two representations previously introduced for the distribution of current in an isolated antenna in a general, infinite, homogeneous, isotropic medium have been used to solve the simulataneous integral equations for the currents in coupled dipole antennas. These are a polynomial and a trigonometric form, each with an exponential multiplier. A description of the apparatus for measuring the properties of coupled antennas is also presented together with tables of measured admittance, current and charge distributions. A comparison of the theoretical and experimental results shows fairly good agreement. (Author).

Download or read book Antennas in Inhomogeneous Media written by Janis Galejs and published by Pergamon. This book was released on 1969 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1969 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Reports written by and published by . This book was released on 1962 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Development Reports written by and published by . This book was released on 1971 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Theoretical and Experimental Analysis of Antennas in Bounded Media with Application to Electromagnetic Probing written by Carl Edward Grove and published by . This book was released on 1975 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AN EXPERIMENTAL STUDY OF THE PROPERTIES OF ANTENNAS IMMERSED IN CONDUCTING MEDIA written by and published by . This book was released on 1961 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measured results of the driving-point admittance, the amplitude distribution of the current, and the phase distribution of the current relative to the phase at the driving point for a dipole antenna when immersed in homogeneous and inhomogeneous conducting media are presented. Measurements were also made of the amplitude distribution and phase distribution of the current for a half-wave dipole antenna immersed in a stratified medium for various gradients of the conductivity. The results of these experiments indicate that either an antenna of short electrical length or a half-wave dipole antenna can be used as a probe to measure the dielectric constant and conductivity of the medium in which it is immersed. A half-wave dipole antenna could well be used to detect an inhomogeneity in an extended medium.