<i>Advanced Antenna Theory</i>

Schelkunoff, S. A.; Twersky, Victor

doi:10.1063/1.3061015

Cited by 85 publications

(33 citation statements)

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“…[1] and [2] (see also [5][6][7]) two of the above four integral equations, those involving the approximate kernel, lead to non-solvable integral equations.…”

Section: Introductionmentioning

confidence: 99%

Input Admittances Arising From Explicit Solutions to Integral Equations for Infinite-Length Dipole Antennas

Fikioris¹,

Valagiannopoulos²

2005

PIER

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Abstract-When one uses integral equations to determine the input admittance of dipole antennas, one must choose between two kernels, the exact and the approximate kernel, and also between (at least) two types of feed, the delta-function generator and the frill generator. For dipole antennas of infinite length, we investigate-analytically and numerically-the similarities and differences between the various admittance values. Particular emphasis is placed on the fact, discussed in detail in recent publications, that certain combinations lead to nonsolvable integral equations.

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“…[1] and [2] (see also [5][6][7]) two of the above four integral equations, those involving the approximate kernel, lead to non-solvable integral equations.…”

Section: Introductionmentioning

confidence: 99%

Input Admittances Arising From Explicit Solutions to Integral Equations for Infinite-Length Dipole Antennas

Fikioris¹,

Valagiannopoulos²

2005

PIER

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“…It can be shown that the EM fields can be determined in terms of an auxiliary scalar wave function A [24],…”

Section: Prolate Spheroidal Antenna Coated With a Dng Mtms Shellmentioning

confidence: 99%

“…Spheroidal wave functions are special functions in mathematical physics [21] which have many applications [22,23], especially in the analysis and design of antennas [24][25][26][27], since spheroidal antennas can be used to model many antenna shapes, from wire/cylindrical antennas via spherical antennas to disk antennas. And the fullwave analyses of the spheroidal antennas coated with a confocal radome are presented in [26].…”

Section: Introductionmentioning

confidence: 99%

Efficient Electrically Small Prolate Spheroidal Antennas Coated With a Shell of Double-Negative Metamaterials

Huang¹,

Tan²

2008

PIER

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Abstract-An efficient, electrically small prolate spheroidal antenna coated with confocal double-negative (DNG) metamaterials (MTMs) shell is presented. The radiation power of this antenna-DNG shell system excited by a delta voltage across an infinitesimally narrow gap around the antenna center is obtained using the method of separation of the spheroidal scalar wave functions. Our results show that this electrically small dipole-DNG shell system has very high radiation efficiency comparing with the normal electrically small antenna due to the inductive effect of the MTMs shell that cancel with the capacitive effect of the electrically small antenna. It is found that the spheroidal shell can achieve more compact structure and higher radiated power ratio than the corresponding spherical shell. This dipole-DNG shell systems with different sizes are analyzed and discussed.

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“…Carter improved upon Lodge's original design by incorporating a tapered feed, one of the key steps towards the design of broadband antennas. In 1940, S. A. Schelkunoff [3] proposed elaborate conical waveguides and feed structures in conjunction with a spherical dipole (see Fig.3). Unfortunately, his design of the spherical dipole antenna was not very useful.…”

Section: History Of Uwb Antennasmentioning

confidence: 99%

“…Fig.1 depicts Lodge's biconical antennas which are unmistakenly used in transmitreceive links. After that, a number of types of UWB antennas were developed in the following several years [2][3][4][5][6][7]. i.e., one of interest rediscoveries of the biconical antenna and conical monopole is done by P. S. Carter in 1939 [2] (See Fig.2).…”

Section: History Of Uwb Antennasmentioning

confidence: 99%

Ultra-Wideband Antenna and Design

Liang¹

2012

Ultra Wideband - Current Status and Future Trends

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Advanced Antenna Theory

Cited by 85 publications

References 0 publications

Input Admittances Arising From Explicit Solutions to Integral Equations for Infinite-Length Dipole Antennas

Input Admittances Arising From Explicit Solutions to Integral Equations for Infinite-Length Dipole Antennas

Efficient Electrically Small Prolate Spheroidal Antennas Coated With a Shell of Double-Negative Metamaterials

Ultra-Wideband Antenna and Design

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