Download PDF by Robert S. Elliott: Antenna Theory & Design

By Robert S. Elliott

A vintage Reissue within the IEEE Press sequence on Electromagnetic Wave idea —Donald G. Dudley, sequence Editor

"Beautifully and obviously written and of the top technical quality." -Dr. Robert J. Mailloux, AFRL/SNH

"A vintage paintings within the box. there are numerous particular descriptions of key electromagnetic suggestions mentioned during this textual content that aren't came across at any place else. the writer is among the most sensible researchers during this box. a lot of his scholars also are best researchers during this box. this article has been utilized by a few of the senior antenna engineers in industry." -Kathleen L. Virga, college of Arizona, Tucson

First released in 1981, Robert S. Elliott's Antenna conception and layout is among the most vital works in electromagnetic thought and functions. In its broad-ranging, analytic therapy, replete with helping experimental facts, Antenna concept and layout conveys primary tools of research that may be used to foretell the electromagnetic habit of approximately every little thing that radiates. After greater than twenty years, it continues to be a key source for college students, professors, researchers, and engineers who require a entire, in-depth remedy of the topic.

in accordance with requests from lots of our participants, IEEE is now reissuing this vintage. Newly revised, it once more can be a useful textbook and a permanent reference for practising engineers.

The IEEE Press sequence on Electromagnetic Wave idea deals remarkable assurance of the sector. It involves new titles of up to date curiosity in addition to reissues and revisions of well-known classics through validated authors and researchers. The sequence emphasizes works of long term archival importance in electromagnetic waves and purposes. Designed in particular for graduate scholars, researchers, and working towards engineers, the sequence offers reasonable volumes that discover and clarify electromagnetic waves past the undergraduate point.

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136) occurs if d S is instead drawn outward from V,, the volume enclosed by S , . 136). 136 will be used in Chapter 7 in the establishment of the induced EMF method for computing the self-impedance of a dipole. 3. 4b. The closed surface S , excludes all the sources, that is, the volume V, is source free. 136). This result will be used in Chapter 3 in the derivation of a formula for the scattering from a waveguide-fed slot. 15 Equivalence of the Transmitting and Receiving Patterns of an Antenna The reciprocity theorem can be used to establish the very important result that the transmitting and receiving patterns of an antenna are the same.

The results of this section can be summarized by saying that when one is doing pattern analysis of a type 1 (actual-source) antenna, the steps t o follow are these. 1. 102) and determine ao(e, $1 and a,(e, $1. 2. 100). Then I a,(8, $) l2 and I a @ , 4) I"il1 give the vertically and horizontally polarized relative power patterns, respectively. 3. 96). I5 D. THE FAR-FIELD EXPRESSIONS FOR TYPE II (EQUIVALENT-SOURCE) ANTENNAS16 A distinction has already been made between antennas for which the actual source distribution is known to reasonable accuracy and those for which it is not.

The next two sections are concerned with developing this alternate approach. I 2 The Schelkunoff Equivalence Principle The concept of equivalent or substitute sources is an old and useful idea that can be traced back to C. Huyghens,17 but the development t o be presented here is patterned after S. A. 18 1 soften i t is a vexing problem to specify the phase distribution of as and a+since all that may really be desired is some specified ao(O,4)I or la,(B, $)I. In such cases, one can search for that phase distribution of a, and adwhich results in the simplest physically realizable current distribution.

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