Transient Properties of an Infinite Cylindrical Antenna

“…The simple results so obtained are valid only in a time scale which is large compared to the transit time across the antenna, and thus fail to give the correct early-time response. However, the earlytime response of a linear antenna has already been evaluated by Latham and Lee [ 1970] in their study of the transient properties of an infinitely long cylindrical antenna.…”

Section: So Many Papers Have Been Written About Scattering and Radiatmentioning

confidence: 99%

A simple way of solving transient thin‐wire problems

Marin¹,

Liu²

1976

Radio Science

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A simple way of calculating the transient response of a thin wire is presented. The method is based on (i) the asymptotic antenna theory for thin wires and (ii) an expansion of the induced current in terms of the so‐called natural modes. An explicit series representation of the transient induced current in terms of the resonances of the wire is obtained and this representation is used to numerically evaluate the wire current using a desk calculator. A comparison is made between the results obtained using the asymptotic theory presented here and those obtained from a numerical solution of a space‐time integral equation. Good agreement between the results is found except for early times. The method points to a fast way of estimating the transient induced currents on more complicated structures such as a wire model of an aircraft.

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“…The transient azimuthal magnetic field for the same antenna configuration is also discussed in [4]. These transient solutions are not only useful for understanding the earlytime transient behavior of dipole antennas, but also are applicable to the design of nuclear electromagnetic pulse (EMP) simulators.…”

Section: Introductionmentioning

confidence: 99%

Accurate Formulas and Asymptotic Expansions of Transient Antenna Current

Chen

Warne

1992

Journal of Electromagnetic Waves and Applications

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Approximate formulas for transient antenna current on an infinite cylindrical antenna caused by a step voltage source, applied at the delta gap, are discussed. A new alternative formula is derived. An asymptotic expansion of the transient solution for late time is given. The Hallén filament approximation, a previous simple formula obtained by averaging, an alternative formula, and the asymptotic expansion are compared to the accurate numerical integration of the exact solution.

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Transient Properties of an Infinite Cylindrical Antenna

Cited by 27 publications

References 5 publications

Nonlinearly Loaded Antennas

Nonlinearly Loaded Antennas

A simple way of solving transient thin‐wire problems

Accurate Formulas and Asymptotic Expansions of Transient Antenna Current

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