A New Method to Analyze Broadband Antenna-Radome Interactions in Time-Domain

You, Jian Wei; Tan, Shu Run; Zhou, Xiao; Yu, Wen Ming; Cui, Tie Jun

doi:10.1109/tap.2013.2290548

Cited by 24 publications

(12 citation statements)

References 25 publications

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“…2. Based on this special allocation, the first term on the right-hand side of (4) can be carried out as follows: (5) in which is the amount of discrete surfaces, and subscript indicates the index of a discrete surface element. The approach to calculate the second term is different according to excitation types (such as the plane wave source, the discrete port, and the waveguide port).…”

Section: B Novel Methods Of Energy Calculation In Fdtd Schemementioning

confidence: 99%

Novel Adaptive Steady-State Criteria for Finite-Difference Time-Domain Method

You

Tan

Cui

2014

IEEE Trans. Microwave Theory Techn.

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Two novel adaptive steady-state criteria are proposed to adaptively determine whether the steady state has been achieved in finite-difference time-domain (FDTD) method. The proposed criteria are established by the total electromagnetic energy in the computational region. To reduce the computational burden of electromagnetic energy calculation, a new approach is presented to replace the volume integral of energy with a surface integral. In addition, after newly defined attenuation coefficient and stability coefficient, novel adaptive steady-state criteria are proposed to overcome the premature convergence, nonmonotonicity, and nonconvergence challenges, which are serious in traditional adaptive steady-state criteria. At the end of this paper, numerical examples are given to demonstrate the effectiveness and superiority of our proposed criteria.

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Section: B Novel Methods Of Energy Calculation In Fdtd Schemementioning

confidence: 99%

Novel Adaptive Steady-State Criteria for Finite-Difference Time-Domain Method

You

Tan

Cui

2014

IEEE Trans. Microwave Theory Techn.

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“…In our past research, we have proposed a TDFIT scheme [28], and now it has been successfully applied to analyze accurately the antenna-radome interaction [29] and the passive-intermodulation phenomenon [30]. Besides, it also has been used to predict the multipactor threshold [31], [32] in high-power microwave devices.…”

Section: Zero-volume Lumped Element and Challengesmentioning

confidence: 99%

Accurate Analysis of Finite-Volume Lumped Elements in Metamaterial Absorber Design

You

Zhang

Jiang

et al. 2016

IEEE Trans. Microwave Theory Techn.

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To simulate lumped elements (LEs) more accurately in metamaterial absorber (MA) designs, a finite-volume LE (FVLE) model based on the time-domain finite-integral theorem (TDFIT) is proposed in this paper. In MA designs, lumped resistors and capacitors play an important role in dissipating electromagnetic (EM) fields, controlling resonant frequencies, and achieving an impedance matching. Through a rigorous mathematical derivation, we successfully prove that an arbitrary lumped resistor or capacitor can be modeled more accurately by modifying the conductivity or permittivity of a finite-volume model in TDFIT method. Compared with existing traditional zero-volume LE (ZVLE) solutions, the coupling effect between the circuit part and the EM part can be considered much better in the proposed FVLE model. For this reason, the numerical results of the FVLE model match the measured results much better. In addition, a result comparison is given to validate that the challenges of grid dispersion error and frequency response error in the classic ZVLE solution can be greatly overcome by the proposed FVLE model. Index Terms-Finite-volume lumped element (FVLE), frequency response error, finite-difference time domain (FDTD), grid dispersion error, metamaterial absorber (MA), timedomain finite-integral theorem (TDFIT), zero-volume lumped element (ZVLE). as a ResearchAssociate. His current research interests include computational electromagnetics, nonlinear microwave and optics, quantum metamaterial, and multiphysics and plasma physics via computer simulation. Letters, and Optics Express. His current research interests include metamaterial antennas, invisible cloaks, and other novel metamaterial functional devices, including theoretical design and experimental realization.Prof. Ma's research of 3-D ground carpet cloak realized by the use of metamaterials has been selected as one of the 10 Breakthroughs of Chinese Science in 2010.

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“…The microstrip antennas of the CLAS are covered with a composite radome, which plays the dual roles of wave transparency and load bearing. There are three typical methods to analysis the electromagnetic property of the radome: one is high frequency method [20][21][22] (e.g., PO, GO), another one is fullwave method [23][24][25] (e.g., FEM, FDTD, MOM), and the last one is hybrid method [26,27] frequency method and is adopted in this work. Compared to accurate full-wave method or efficient hybrid method, the RT-SI approach has the acceptable accuracy, and, more important, it has clear physical principle and the possibility to reveal the relation of far field data, radome, and near field data [28].…”

Section: The Conventional Analysis Process Of the Clasmentioning

confidence: 99%

A Novel Inversion Method of Manufacturing Flaws in the Packaging of Conformal Load-Bearing Antenna Structure

Song

et al. 2015

International Journal of Antennas and Propagation

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Composite material is widely used in the conformal load-bearing antenna structure (CLAS), and the manufacturing flaws in the packaging process of the CLAS will lead to the degradation of its wave-transparent property. For this problem, a novel inverse method of the flaw's dimension by antenna-radome system's far field data has been proposed. Two steps are included in the inversion: the first one is the inversion from the far filed data to the transmission coefficient of the CLAS's radome; the second one is the inversion from the transmission coefficient to the flaw's dimension. The inversion also has a good potential for the separable multilayer composite material radome. A 12.5 GHz CLAS with microstrip antenna array is used in the simulation, which indicates the effectiveness of the novel inversion method. Finally, the error analysis of the inversion method is presented by numerical simulation; the results is that the inversed error could be less than 10%, if the measurement error of far field data is less than 0.45 dB in amplitude and ±5 ∘ in phase.

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A New Method to Analyze Broadband Antenna-Radome Interactions in Time-Domain

Cited by 24 publications

References 25 publications

Novel Adaptive Steady-State Criteria for Finite-Difference Time-Domain Method

Novel Adaptive Steady-State Criteria for Finite-Difference Time-Domain Method

Accurate Analysis of Finite-Volume Lumped Elements in Metamaterial Absorber Design

A Novel Inversion Method of Manufacturing Flaws in the Packaging of Conformal Load-Bearing Antenna Structure

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