Far‐field pattern calculation in body‐of‐revolution finite‐difference time‐domain (BOR–FDTD) method

Yu, Weikuan; Farahat, N.; Mittra, R.

doi:10.1002/mop.1353

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…To solve (1) without the CFL condition, we apply the Crank-Nicolson scheme to (1) and factor out the resultant equation, leading to (2) . We here split (2) using the LOD scheme as (3a) (3b) .…”

Section: Formulationsmentioning

confidence: 99%

“…A body of revolution finite-difference time-domain (BOR-FDTD) method has widely been used to analyze an electromagnetic problem in a rotationally symmetric geometry [1], e.g., a monopole antenna [2], a dielectric rod antenna [3], and a thin dielectric lens [4]. To remove the Courant-Friedrich-Levy (CFL) condition of the conventional BOR-FDTD, the alternatingdirection implicit scheme has been introduced into the BOR-FDTD [5].…”

Section: Introductionmentioning

confidence: 99%

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General formulation of an efficient implicit BOR-FDTD method based on the locally one-dimensional scheme

Shibayama

Ando

Yamauchi

et al. 2010

2010 IEEE International Conference on Wireless Information Technology and Systems

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Section: Formulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

General formulation of an efficient implicit BOR-FDTD method based on the locally one-dimensional scheme

Shibayama

Ando

Yamauchi

et al. 2010

2010 IEEE International Conference on Wireless Information Technology and Systems

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“…The directivity is calculated from fields on a virtual closed surface regarded as a Huygens plane which encloses the antenna structure in the computational region [15], [16].…”

mentioning

confidence: 99%

“…The waves propagating along linearly and curvilinearly tapered rods are evaluated using the body-ofrevolution finite-difference time-domain (BOR-FDTD) method [14]- [16]. The use of the BOR technique enables us to efficiently calculate long cylindrical-dielectric-rods [17].…”

mentioning

confidence: 99%

Linearly and curvilinearly tapered cylindrical- dielectric-rod antennas

Ando

Ohba

Numata

et al. 2005

IEEE Trans. Antennas Propagat.

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Abstract-The body-of-revolution finite-difference time-domain (BOR-FDTD) method is applied to the analysis of a tapered cylindrical-dielectric-rod fed by a metallic waveguide with a launching horn. Before evaluating the wave propagating along the tapered rod, we design the launching horn to efficiently excite the fundamental guided-mode of a uniform rod. After confirming the effectiveness of the launching horn, guided-mode conversion properties are evaluated in linearly and curvilinearly tapered rods. As a result, the guided mode excited at the feed end is smoothly converted into that at the free end in a curvilinearly tapered rod. It is numerically revealed that the smooth guided-mode conversion leads to the expansion of the equiphase field region in a terminal aperture with a subsequent increase in the gain. The calculated radiation patterns are in good agreement with experimental data.Index Terms-Antenna theory, dielectric antennas, dielectric waveguides, endfire antennas, finite-difference time-domain (FDTD) methods.

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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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Far‐field pattern calculation in body‐of‐revolution finite‐difference time‐domain (BOR–FDTD) method

Abstract: In this paper, we present a far-field pattern calculation

Cited by 3 publications

References 8 publications

General formulation of an efficient implicit BOR-FDTD method based on the locally one-dimensional scheme

General formulation of an efficient implicit BOR-FDTD method based on the locally one-dimensional scheme

Linearly and curvilinearly tapered cylindrical- dielectric-rod antennas

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

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