Journal ArticleDOI
Theoretical investigation of cylindrical dielectric-rod antennas
J.R. James
- Vol. 114, Iss: 11, pp 309-319
TLDR
In this article, a detailed application of the vector Kirchhoff formula to uniform cylindrical dielectric rods supporting the HE11 mode produces an expression for the far-field radiation pattern, which, when computed, gives good agreement with existing experimental data.Abstract:
Present-day theory of uniform cylindrical dielectric-rod antennas rests on the three theoretical treatments of Horton, Bouix and Fradin (leaky-guide theory), and on Brown's end-fire theory A digression on the general relationship between Schelkunoff's equivalence principle and the vector Kirchhoff formula reveals that these radiation formulas may only be applied to regions in which the vector potentials are known to satisfy the inhomogeneous wave equation On applying this axiom to the theories, all but Brown's are shown to be fallacious A detailed application of the vector Kirchhoff formula to uniform cylindrical dielectric rods supporting the HE11 mode produces an expression for the far-field radiation pattern, which, when computed, gives good agreement with existing experimental data The analysis allows for dielectric losses and can also be extended to nonuniform dielectric antennas with gradual tapers Fresnel interaction of the apertures and lens effects are considered Finally, some design recommendations for dielectric rod antennas are maderead more
Citations
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Book ChapterDOI
Review of Electromagnetic Waves
J. Thornton,Kao-Cheng Huang +1 more
TL;DR: In this paper, the authors describe the Maxwell's Equations Antenna Parameters Polarization Wave Propagation in Metamaterials (MWPWP) in the context of the propagation of wave in a metamaterial.
Journal ArticleDOI
Line feeds for paraboloids
TL;DR: In this article, the authors examined the geometrical limitations on the use of an endfire-line source as a feed for a Cassegrain aerial and found no more stringent restrictions than those imposed by the system itself.
References
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Book
Microwave antenna theory and design
TL;DR: This book discusses microwave antenna design problems, circuit relations, reciprocity theorems, and antenna measurements - techniques.
Journal ArticleDOI
Diffraction Theory of Electromagnetic Waves
Julius Adams Stratton,L. J. Chu +1 more
TL;DR: In this paper, a vector analog of Green's theorem is applied to the calculation of diffraction of electromagnetic waves from a rectangular slit in a screen of infinite conductivity, and the results are compared with an exact solution obtained recently by Morse and Rubenstein.
Journal Article
Polyrod antennas
G. E. Mueller,W. A. Tyrrell +1 more
TL;DR: In this article, the polyrod, a new form of microwave end-fire antenna, is described, which consists of a properly shaped dielectric rod protruding from a metal waveguide.
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