Journal ArticleDOI
Radiation from slot antennas on cones
D. Pridmore-Brown,G. Stewart +1 more
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TLDR
In this paper, integral representations for the radiation field from slots on the surface of a semi-infinite conducting cone are given for the delta function circumferential slots, for various cone angles, slot positions, and azimuthal variations.Abstract:
Integral representations are given for the radiation field from slots on the surface of a semi-infinite conducting cone. The corresponding normal mode representations for delta function circumferential slots are evaluated numerically for various cone angles, slot positions, and azimuthal variations. Experimentally measured patterns for two finite models are reported and compared with the semi-infinite cone theory. In particular, effects due to finite cone length and finite tip radius are discussed.read more
Citations
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Journal ArticleDOI
Approximation techniques for the mutual admittance of slot antennas on metallic cones
TL;DR: In this paper, the effect of tip scattering on mutual admittance was investigated for pairs of circumferential and radial slots on a semi-infinite metallic cone, where the base of the conical model was terminated in a spherical cap to minimize scattering from the finite length of the apparatus.
Book ChapterDOI
Uniform Geometrical Theory of Diffraction
TL;DR: In this paper, the authors discuss the application of the geometrical theory of diffraction (GTD) for solving problems of electromagnetic (EM) radiation and scattering at high frequencies.
Journal ArticleDOI
A UTD type analysis of the plane wave scattering by a fully illuminated perfectly conducting cone
TL;DR: In this article, a uniform high-frequency asymptotic solution, based on the physical optics approximation, is obtained in the format of the uniform geometrical theory of diffraction (UTD) to describe the fields diffracted by the tip of a semi-infinite, perfectly conducting cone when it is fully illuminated by an electromagnetic plane wave.
Journal ArticleDOI
Radiation characteristics of spherical triangular array antenna
TL;DR: In this article, a type of spherical triangular array composed of turnstile elements is numerically analyzed and discussed, and it is found that the spherical array proposed here is able to scan its beam up to large angle without variation of the directivity and the circular polarization property.
Book ChapterDOI
High-Frequency Methods
TL;DR: In this article, asymptotic high-frequency (HF) techniques and solutions for analyzing a variety of electrically large, electromagnetic (EM) scattering and diffraction problems are summarized.
References
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Journal ArticleDOI
Exterior electromagnetic boundary value problems for spheres and cones
L. L. Bailin,S. Silver +1 more
TL;DR: In this paper, the problem of determining a harmonic time-varying electromagnetic field where the electric vector assumes prescribed values for its tangential components over given spherical or conical boundaries and which has proper radiation characteristics at infinity is considered by a procedure very much like that used in the theory of slots in waveguide walls.
Journal ArticleDOI
Effect of Thin Plasmas on an Aperture Antenna in an Infinite Conducting Plane
TL;DR: In this article, a variational expression for the admittance of an arbitrary aperture (fed by a waveguide) in an infinite conducting plane covered by an impedance sheet is developed, and examined in detail.
Journal ArticleDOI
Corrections to "Exterior electromagnetic boundary value problems for spheres and cones"
L. Bailin,S. Silver +1 more
Journal ArticleDOI
Radiation from ring sources in the presence of a semi-infinite cone
TL;DR: In this article, a rigorous formulation for ring source Green's functions for a semi-infinite cone, carried out in terms of images in an infinitely extended angular transmission line, is evaluated asymptotically in the short-wave length range to yield geometric-optical, diffracted, and transition effects.