2 edition of Metallic and dielectric antennas found in the catalog.
Metallic and dielectric antennas
J. Bach Andersen
|Statement||[by] J. Bach Andersen.|
|LC Classifications||TK6565.A B28|
|The Physical Object|
|Number of Pages||217|
|LC Control Number||72186819|
high impedance material (b) Magneto-dielectric antenna on a metallic ground of electrically small metallic antennas. .. 25 Efficiency equation () contour plot (a) versus and and (b) versus and (). The three regions indicate region of high loss, moderate loss and low. The input resistance and the effective height are computed, with reference to several antennas in conductive environment in the limiting static case. For a gap type excitation, it is found that the above parameters are logarithmic functions of the gap thickness. Experiments performed on models confirming theoretical deductions are also reported. The possibility of extending static .
Get this from a library! Electromagnetic modeling of composite metallic and dielectric structures. [Branko M Kolundžija; A R Djordjević] -- Annotation This practical, new book provides a much wider choice of analytical solutions to problems faced by antenna design engineers and researchers working in electromagnetic modeling. Based on. The book is organized around three main topic areas: The propagation, reflection, and transmission of plane waves, and the analysis and design of multilayer films. Waveguiding systems, including metallic, dielectric, and surface waveguides, transmission lines, impedance matching, and S-parameters.
A low-cost antenna array and method of manufacturing the array, in a planar form or in a structurally flexible or curved array structure are shown. The antenna array has a plurality of metallic antenna electrical and radiator elements formed on a foam core layer bonded onto a metallic ground layer. The radiator elements preferably are formed on a thin dielectric carrier . The low dielectric constant reduces the surface wave losses which are tied to guided wave propagation within the substrates. Therefore, lowering the dielectric constant increases spatial waves and hence increases the impedance bandwidth of the antenna, allowing the development of antennas with acceptable efficiency and high gain [3,28–30].Again, one .
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This book contains a useful compilation -of material on dielectric and metallic cylindrical antennas with emphasis on the dielectric antenna. These antennas are analyzed in terms of waves traveling on cylindrical surfaces.
In Chapter I the various waves on a two-dimensional planar antenna are described as an introduction to the subject. The familiar metallic, linear antenna Author: R. Kouyoumjian. A dielectric–metallic jointly three-dimensional (3D) printed V-band (50–75 GHz) lens antenna with preliminary surface roughness modelling is proposed.
It takes full advantage of both the dielectric and metallic 3D printing technologies which help effectively to control the cost of the lens antenna.
The stereolithography apparatus is used to form the lens using Somos Imagine Cited by: 4. The book enables you to use cutting-edge method-of-moments procedures, with new theories and techniques that help you optimize computer performance in numerical analysis of composite metallic and dielectric structures in the complex frequency domain.
Abstract: A novel double higher order Galerkin-type method of moments based on higher order geometrical modeling and higher order current modeling is proposed for surface integral equation analysis of combined metallic and dielectric antennas and scatterers of arbitrary shapes. The technique employs generalized curvilinear quadrilaterals of arbitrary geometrical orders for the Cited by: A dielectric resonator antenna (DRA) is a radio antenna mostly used at microwave frequencies and higher, that consists of a block of ceramic material of various shapes, the dielectric resonator, mounted on a metal surface, a ground waves are introduced into the inside of the resonator material from the transmitter circuit and bounce back and forth.
Dielectric lens antennas are attracting a renewed interest for millimeter- and submillimeter-wave applications Metallic and dielectric antennas book they become compact, especially for configurations with integrated feeds usually referred as integrated lens antennas. Djordjevic A () Electromagnetic modelling of composite metallic and dielectric structures.
Artech. Dielectric today offers a full complement of radio products, and the most complete line of television antenna products of any manufacturer in the world.
What separates us from any other manufacturer is the precise engineering of each product to ensure the clearest transmission from your specific installation.
♥ Book Title: Dielectric Resonator Antennas ♣ Name Author: A. Kishk ∞ Launching: Info ISBN Link: ⊗ Detail ISBN code: ⊕ Number Pages: Total sheet ♮ News id: qDBfPgAACAAJ Download File Start Reading ☯ Full Synopsis: "Dielectric resonator antennas (DRA) are attractive as an alternative to microstrip antennas because of.
Abstract: Singly-fed 45 ° slant-polarized (SP) omnidirectional antennas without complex feed network are proposed in this letter. The antennas consist of a feeding probe that radiates monopolar omnidirectional vertically polarized (VP) fields and parasitic metallic/dielectric parallelepiped elements that convert omnidirectional VP fields into 45 ° SP.
ing similar guidelines. Antennas, scatterers, passive microwave circuits, and so forth, represent structures consisting of metallic and dielectric parts collectively referred to as composite metallic and dielectric structures.1 If all the parts are made of linear materials, analysis can be facilitated, running in the domain of.
Electromagnetic Modeling of Composite Metallic and Dielectric Structures Antennas for Information Super Skyways: An Exposition on Outdoor and Indoor Wireless Antennas (Antennas) (Antennas, 12) The Art and Science of Ultrawideband Antennas.
Ulrich Jakobus (born ) is Senior Vice President - Electromagnetic Solutions of Altair, Germany and was awarded Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in for leadership in hybrid computational tool development and research laid the foundations for the commercial electromagnetics code FEKO which is used in antenna design, antenna.
Dielectric resonator antennas (DRA) are ceramic based materials that are nonmetallic in nature. They offer high permitivity values (εr: ). DRAs. have made their mark in various applications specially in the microwave and millimeter wave (MMW) spectrum, and are making encouraging progress in the THz band, because of their low conduction losses.
Based on leading-edge method-of-moments procedures, the book presents new theories and techniques that help professionals optimize performance in numerical analysis of composite metallic and dielectric structures in the complex frequency s: 1.
The book enables you to use cutting-edge method-of-moments procedures, with new theories and techniques that help you optimize computer performance in numerical analysis of composite metallic and dielectric structures in the complex frequency domain. microstrip patch antennas, and many others.
More than equations and illustrations. antenna has negligible metallic loss, it is highly efficient when operated at first book on dielectric resonator antennas. Special thanks also go to all chapter contributors. The encouragement.
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Kilundzija, etc. An antenna can also be thought of as a transitional structure between free space and a guiding device (such as transmission line or waveguide).
Usually antennas are metallic structures, but dielectric antennas are also used now a day., In our discussion we shall consider only metallic antennas. Dielectric resonators using high-permittivity materials were originally developed for microwave circuits, such as filters or oscillators as tuning element .Indeed, in the late nineteen sixties, the development of low-loss ceramic materials opened the way for their use as high-Q elements .Then, making use of dielectric materials to create the dielectric resonator antenna.
A transparent dielectric- core antenna surrounded by patterned metallic metasurfaces. The patterned metallic metasurface acts as a conductive medium for surface current to flow and efficiently radiate fields driven by a power source.
Furthermore, the patterned metallic metasurface can strongly reduce the electrical presence of the dielectric-core to realize a radio- transparent antenna. The calculation of different losses (conductor, dielectric and radiation loss) are explained in detail in the book: Handbook of Microstrip Antennas_James & Hall_ in Chapter 3.This book provides engineers with a comprehensive review of the state-of-the-art in reflectarray antenna research and development.
The authors describe, in detail, design procedures for a wide range of applications, including broadband, multi-band, multi-beam, contour-beam, beam-scanning, and conformal reflectarray antennas. They provide sufficient coverage of basic .classes of antennas, i.e., the microstrip antenna and the dielectric resonator antenna (DRA) have been under investigation for modem wireless applications.
Being high Q antennas, the microstrip antennas, possess narrow bandwidth. To increase the bandwidth, one of the early proposals was to increase the electrical thickness of the substrate.