Journal ArticleDOI
Directivity of a broadside array of isotropic radiators
TLDR
Directivity curves of a uniform broadside array of isotropic sources were shown to illustrate that gain increases almost linearly with aperture size until an optimum source spacing of approximately 0.9 λ is reached.Abstract:
Directivity curves, of a uniform broadside array of isotropic sources, are shown to illustrate that gain increases almost linearly with aperture size until an optimum source spacing of approximately 0.9 \lambda is reached.read more
Citations
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Journal ArticleDOI
Directivity of planar array feeds for satellite reflector applications
Yahya Rahmat-Samii,Shung-Wu Lee +1 more
TL;DR: In this paper, a closed-form expression for the radiated power is obtained for arrays with the well-known (\cos \theta)q -type element patterns, taking into account polarization, nonsymmetric E - and H -plane element pattern, nonuniform element spacings and arbitrary complex excitation coefficients.
Book
Spaceborne antennas for planetary exploration
TL;DR: In this article, Imbriale et al. present an overview of the development of antenna technologies in the field of space exploration. But their focus is on the early stages of this field and not the current state of the art.
Journal ArticleDOI
Communications Satellites Using Arrays
TL;DR: This paper points up the salient advantages of the AVA system, and de'ineates the major areas where further work is indicated.
Journal ArticleDOI
A Novel Directivity Expression for Planar Antenna Arrays
TL;DR: In this article, an equation that is useful for rapid machine computation of the directivity characteristics of a planar array with discrete identical elements and uniform phase progression is derived, where the number of elements and the interelement spacings along two principal axes, the beam-pointing angles, the array excitation in amplitude, and an element voltage pattern of the form (cos θ)ν+1/2, where ν > −1.
Book ChapterDOI
CHAPTER 1 – Aperture Theory
TL;DR: In this article, the authors describe the antenna pattern as a plot of the field strength amplitude versus a space coordinate, which is usually an angle and is represented by one or more cross sections in the principal planes.
References
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Journal ArticleDOI
Directive diagrams of antenna arrays
TL;DR: In this article, a collection of directive amplitude diagrams for arrays of 2 and of 16 identical antennae spaced at equal distances along a straight line with equal phase differences introduced between the currents in adjacent antennae, assuming that each antenna radiates equally in all directions in the plane of the diagram.