Dielectric aerials. by D. G. Kiely

Cover of: Dielectric aerials. | D. G. Kiely

Published by Methuen, Wiley in London, New York .

Written in English

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  • Antennas (Electronics),
  • Wave guides.,
  • Microwaves.

Edition Notes

Bibliography: p. 129.

Book details

StatementForeword by H. M. Barlow.
SeriesMethuen"s monographs on physical subjects
LC ClassificationsTK7872.A6 K5
The Physical Object
Pagination132 p.
Number of Pages132
ID Numbers
Open LibraryOL6137689M
LC Control Number53012021

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This book attempts to bring together the theory and practice of dielectric materials for different kind of industrial applications. Fragmented information on dielectric theory and properties of materials, design of equipment and state of the art in applications relevant to the manufacturing industry should be collated and updated and Dielectric aerials.

book as a single reference volume. In this book. Dielectric aerials. London, Methuen; New York, Wiley [] (OCoLC) Dielectric aerials. book Type: Book: All Authors / Contributors: D G Kiely. Find more information about: OCLC Number: Description: pages illustrations 17 cm.

Series Title: Methuen's monographs on physical subjects. Dielectric Aerials.D. Kiely Methuen, London; Wiley, New York, xii + pp. Illus. $2Cited by: 1. Dielectric Aerials With 48 Diagrams Hardcover – by D. Kiely (Author) See all formats and editions Hide other formats and editions.

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likes 83 talking about this. Dielectric provides innovative solutions to broadcasters and telecommunication ers: Dielectric media affect the wave propagation by their reflective index. Their use in antennas can provide a number of diverse benefits.

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The dielectric hemisphei"ical aerial of radius a and constants (El, /LO, crl=O) is excited by a coaxial line as shown in Fig. The outer. A dielectric (or dielectric material) is an electrical insulator that can be polarized by an applied electric a dielectric material is placed in an electric field, electric charges do not flow through the material as they do in an electrical conductor but only slightly shift from their average equilibrium positions causing dielectric polarization.

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Abstract. Dielectric lens antennas are attracting a renewed interest for millimeter- and submillimeter-wave applications where they become compact, especially for configurations with integrated feeds usually referred as integrated lens antennas.

A Review on Dielectric Resonator Antenna. Pratima R The modal expansion method is used to describe the fields in the dielectric resonator side and the change in the modal voltage of the image.

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"What hasn't been known is how the dielectric medium results in emission of electromagnetic waves. 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 (DRA Cited by: 6.

Choosing Dielectric or Magnetic Material to Optimize the Bandwidth of Miniaturized Resonant Antennas A. Karilainen, P. Ikonen, C. Simovski, and S. Tretyakov January 9, Abstract We address the question of the optimal choice of loading material for antenna miniaturization.

A new approach to identify the optimal loading material File Size: KB. By Simon Kingsley The subject of dielectric aerials has not yet been developed and advanced to the same degree as that of other types of micro-wave aerial.

” These were the opening words of the preface to a book entitled “Dielectric Aerials by D. Kiely[1]. This work gives an up-to-date account of the theory of dielectrics suitable for graduates and final-year undergraduates in physics, chemistry, electrical engineering and materials science.

There is a concentration on the basic principles of the subject, without a detailed discussion of experimental data. The macroscopic behaviour of dielectric materials receives most attention; nevertheless an.

Dielectric, Ferroelectric, and Optical Properties 37 1 The local field Eloc can be calculated by the method of Clausius and Mossotti (see e.g.

[6]). The calculation reveals a relation between the atomic polarizability α and the macroscopic permittivity example, for cubic crystal structuresFile Size: 4MB.

The dielectric rod antenna belongs to the family of surface wave antennas. The propagation mechanisms of surface waves along a dielectric and/or magnetic rod are explained in Appendices A and B. The hybrid HE 11 mode (Fig. B.2) is the dominant surface wave mode and is used most often with dielectric rod antennas.

The higher, transversal modes File Size: KB. The words antenna and aerial are used interchangeably. Occasionally the equivalent term “aerial” is used to specifically mean an elevated horizontal wire antenna.

The origin of the word antenna relative to wireless apparatus is attributed to Italian radio pioneer Guglielmo the summer ofMarconi began testing his wireless system outdoors on his father's estate near Bologna. ♥ 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 their small size.

Cutoff wavelength of the step-index DSF is typically λc = μm so as to make the waveguide dispersion σ W large at μm region. Under the waveguide parameters of Δ = % and 2a = μm, the cutoff wavelength λc = μm. Therefore it is susceptible to large bending loss because light confinement to the core becomes weak.

An up-to-date literature overview on relevant approaches for controlling circuital characteristics and radiation properties of dielectric resonator antennas (DRAs) is presented. The main advantages of DRAs are discussed in detail, while reviewing the most effective techniques for antenna feeding as well as for size reduction.

Furthermore, advanced design solutions for enhancing the realized Cited by: dielectric antenna[‚dīə′lektrik an′tenə] (electromagnetism) An antenna in which a dielectric is the major component used to produce a desired radiation pattern.

Dielectric Antenna an antenna in the form of a section of dielectric rod excited by a radio wave guide or the post of a coaxial cable. A wave of a specific shape (a so-called. DIELECTRIC PROPERTIES OF FOOD MATERIALS PRESENTED BY: S A Q I B R A S H I D L O N E 1 4 P F T 0 1 1 L O N E S A Q I B @ G M A I L.

C O M. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Waveguides and waveguide type devices are commonly associated with antennas and aerials, these are classified in H01Q. H01P is concerned with individual circuit components, or basic combinations of them.

More complicated networks with lumped impedance elements are classified in H03H. References Limiting references This place does not cover. Procedure: Dielectric Strength Test Dielectric tests are used in the industry to inspect a wide variety of products, devices, and equipment.

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Progress In Electromagnetics Research SymposiumHangzhou, China, August Hybrid Dielectric Resonator with Other Resonators A types of antennas is considered as the combination of a dielectric resonator with other resonators, such.

We know that the permittivity of a material relates to (1) the speed of propagation of an electromagnetic wave thorugh a material, and (2) the energy stored by an Electric Field within a material.

The Dielectric Constant is a convenient way of discussing the permittivity of materials. Recall that the permittivity of a vacuum (that is, in outer space or where there is no atoms or material in a.

For ac dielectric spectroscopy measure-ments the complex dielectric function, e¼ e0-ie00, was determined as a function of fre-quency and temperature.[12,13] In addition to ac dielectric spectroscopy measurements, the non-isothermal dielectric technique of thermally stimulated depolarization cur-rents (TSDC) was used.

TSDC consists of. It is well known that as the diameter of a dielectric waveguide decreases, more energy of the supported modes is conducted outside the guide.

Thus the absorption coefficient of the waveguide material becomes only partially effective and the “effective absorption coefficient” is a function of the surrounding medium also. The effective absorption coefficient can be determined by calculating. A dielectric is the material between two charges.

It impeds the flow of charge until a certain voltage threshold at which point charge starts flowing. When I first learned about capacitors I thought that this was the way capacitors were used. They charge up to a strong enough voltage and then the dielectric breaks down and then they charge up.

This book is about common medium wave and high frequency (short wave) antennas, but the theory presented here relates to antennas of any frequency. The resistive losses in the conductors of the feed-line and the dielectric losses in the feed-line also rob power from the system.

These are the reasons for you to use the best tuners and feed. Stacked Dielectrics Consider a parallel-plate capacitor with area A of each plate and spacing d. Capacitance without dielectric: C0 = 0A d: Dielectrics stacked in parallel: C = C1 +C2 with C1 = 1 0 A=2File Size: KB.

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dielectric lens antennas, i.e. elliptic and hyperbolic. Their particular features as well as behavior of radiating systems incorporating the lenses are investigated. Specific features of these lenses are discussed for both, near-field and far-field based on simulation and measurement results.

Keywords Dielectric lens antennas, elliptic, hyperbolic,File Size: KB. The dielectric layer appears to be dense and uniform, with an average layer thickness of µm and an average grain size of µm, with a maximum of µm measured.

No dielectric cracks, either long-range or short-range, were observed in any of the samples. Some minor voids could be observed in the dielectric matrix (indicated by arrows).File Size: 2MB. There are many designs for dielectric antennae so, as with 'metal' antennae, it is not possible to specify much about the feeding arrangement.

Some dielectric antennae behave just like an optical lens - in the same way that a reflecting dish (e.g. Newtonian Telescope) does effectively the same thing as the lens in a refracting telescope.it [Ebook]: Dielectric Resonator Antenna Handbook (Artech House Antennas And Propagation Library) by Aldo Petosa is a very good book Dielectric Resonator Antenna Handbook (Artech House Antennas And Propagation Library) for understanding basics of dra antenna: Transcribe the wraparound porch.dielectric constant (ε'or K) values of the ceramic aff o r d size reduction of the circuit approximately equal to the square root of the ceramic’s ε' value.

Therefore, a resonant circuit using a dielectric material with a ε' of 36 can be ~6 times smaller than an equivalent circuit.

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