Electromagnetic scattering by partially inhomogeneous dielectric bodies of revolution

Kucharski, Andrzej A.

doi:10.1002/mop.20610

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…Here, we are particularly interested in the surface equivalence principles-we assume that the sub-problems are formed by the introduction of fictitious surface currents at regions boundaries. Typical examples concern modeling of homogeneous [13] or inhomogeneous [14] dielectric bodies, or situations in which fields in various environments are coupled via an aperture in a metal screen [15]- [17].…”

Section: Integral Equation Macromodelsmentioning

confidence: 99%

Efficient Solution of Integral-Equation Based Electromagnetic Problems With the Use of Macromodels

Kucharski

2008

IEEE Trans. Antennas Propagat.

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Fig. 5. Comparison of the full-wave simulated patterns and the measured patterns in [10]: (a) f (1.56 GHz). (b) f + prf and f + 2prf. to the measured SLL of about 028:32 dB. Fig. 5(b) shows the full-wave simulated sideband patterns at the first and second sidebands, in comparison with the measured results in [10]. The simulated peak sideband levels are 012:19 and 017:81 dB at the first and second sidebands, close to the measured levels of 013:09 and 021:05 dB in [10], respectively. In general, the full-wave simulated sideband patterns are in reasonable agreement with the measured sideband patterns in [10]. IV. CONCLUSIONIn this communication, we have proposed a frequency-domain full wave approach to simulate the TM linear antenna arrays. By decomposing the time-domain excitations into frequency-domain amplitude and phase excitations at the central modulating frequency as well as the sideband frequencies, the TM linear arrays can be simulated using conventional frequency-domain full-wave simulation approach. Consequently, the space and frequency responses of the TM linear arrays can be obtained through combinations of the space patterns at the respective central modulating frequency and sideband frequencies. The proposed approach was applied to the full-wave simulations of L-band printed dipole TM linear arrays with VAS time modulation schemes.The full-wave simulation results are in reasonable agreement with reported measurement results, thus demonstrating the effectiveness of the proposed approach. suppression in time-modulated linear arrays by the differential evolution algorithm," "Design of a uniform amplitude time modulated linear array with optimized time sequences," IEEE Trans.Abstract-The idea of so-called macromodels is applied to problems of computational electromagnetics involving integral-equation/method-of-moments formulations. It is shown that with the use of equivalence principles, it is possible to exclude a part of the problem, calculate its wideband response without an a priori knowledge of the excitations, and then efficiently combine the result into the original situation. The idea is validated using examples involving slot-excited dielectric resonator antennas. Index Terms-Domain decomposition, integral equations, method of moments (MoM).

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Section: Integral Equation Macromodelsmentioning

confidence: 99%

Efficient Solution of Integral-Equation Based Electromagnetic Problems With the Use of Macromodels

Kucharski

2008

IEEE Trans. Antennas Propagat.

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“…The BOR-FDTD method has been demonstrated as a robust and versatile numerical tool for solving axial symmetric problems as found in [9 -11], though they can also be solved using other frequency domain methods [12][13][14]. BOR-FDTD is a cylindrically based algorithm, and it expands the angular dependence using Fourier series.…”

Section: Introductionmentioning

confidence: 99%

Analysis of electromagnetic band‐gap waveguide structures using body‐of‐revolution finite‐difference time‐domain method

Tong

Sauleau

Rolland

et al. 2007

Micro & Optical Tech Letters

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Study of electromagnetic band‐gap (EBG) structures has become a hot topic in computational electromagnetics. In this article, some EBG structures integrated inside a circular waveguide are studied. They are formed by a series of air‐gaps within a circular dielectric‐filled waveguide. A body‐of‐revolution finite‐difference time‐domain (BOR‐FDTD) method is adopted for analysis of such waveguide structures, due to their axial symmetric properties. The opening ends of the waveguide are treated as a matched load using an unsplit perfectly matched layer technique. Excitations on a waveguide in BOR‐FDTD are demonstrated. Numerical results of various air‐gap lengths with respect to the period of separation are given, showing an interesting tendency of EBG behavior. A chirping‐and‐tapering technique is applied on the EBG pattern to improve the overall performance. The proposed EBG structures may be applied into antenna structures or other system for unwanted signal suppression. Results show that the BOR‐FDTD offers a good alternative in analyzing axial symmetric configurations, as it offers enormous savings in computational time and memory comparing with a general 3D‐FDTD algorithm. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2201–2206, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22668

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Do we still need Body-or-Revolution techniques in computational electromagnetics?

Kucharski

2019

2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)

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Electromagnetic scattering by partially inhomogeneous dielectric bodies of revolution

Abstract: ABSTRACT:

Cited by 3 publications

References 13 publications

Efficient Solution of Integral-Equation Based Electromagnetic Problems With the Use of Macromodels

Efficient Solution of Integral-Equation Based Electromagnetic Problems With the Use of Macromodels

Analysis of electromagnetic band‐gap waveguide structures using body‐of‐revolution finite‐difference time‐domain method

Do we still need Body-or-Revolution techniques in computational electromagnetics?

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