TY - JOUR

T1 - Analysis of arbitrary frequency-dependent losses associated with conducting structures in a time-domain electric field integral equation

AU - Mei, Zicong

AU - Zhang, Yu

AU - Sarkar, Tapan K.

AU - Salazar-Palma, Magdalena

AU - Jung, Baek Ho

PY - 2011

Y1 - 2011

N2 - The objective of this letter is to present a solution methodology for the analysis of arbitrary frequency-dependent losses on conducting structures in a time-domain electric field integral equation. The analysis of arbitrary frequency-dependent losses is incorporated in the newly developed marching-on-in-degree (MOD) method to solve the time-domain electric field integral equation. The novelty of this methodology is that both the arbitrary temporal dependence of the frequency-dependent losses and the transient current variations on the conducting structures are expanded in terms of the causal orthonormal associated Laguerre functions. The advantage of implementing these temporal expansion functions is that the convolution between two functional variations, namely the loss factor and the current density, can be treated in an analytical fashion resulting in an accurate and efficient solution methodology. Numerical examples dealing with both time-varying concentrated loads and skin-effect losses on electrically large conducting structures are analyzed to illustrate the potential of this method.

AB - The objective of this letter is to present a solution methodology for the analysis of arbitrary frequency-dependent losses on conducting structures in a time-domain electric field integral equation. The analysis of arbitrary frequency-dependent losses is incorporated in the newly developed marching-on-in-degree (MOD) method to solve the time-domain electric field integral equation. The novelty of this methodology is that both the arbitrary temporal dependence of the frequency-dependent losses and the transient current variations on the conducting structures are expanded in terms of the causal orthonormal associated Laguerre functions. The advantage of implementing these temporal expansion functions is that the convolution between two functional variations, namely the loss factor and the current density, can be treated in an analytical fashion resulting in an accurate and efficient solution methodology. Numerical examples dealing with both time-varying concentrated loads and skin-effect losses on electrically large conducting structures are analyzed to illustrate the potential of this method.

KW - Frequency-dependent loads

KW - Laguerre polynomials

KW - method of moments (MoM)

KW - skin-effect loss

KW - time-domain electric field integral equation (TD-EFIE)

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U2 - 10.1109/LAWP.2011.2161255

DO - 10.1109/LAWP.2011.2161255

M3 - Article

AN - SCOPUS:79960671313

SN - 1536-1225

VL - 10

SP - 678

EP - 681

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

M1 - 5940203

ER -