Modal-Expansion Analysis of Electromagnetically Coupled Coaxial Dipole Antennas

Zhongxiang SHEN; Quanxin WANG; Ke-Li WU

doi:10.1093/ietcom/e89-b.5.1654

Modal-Expansion Analysis of Electromagnetically Coupled Coaxial Dipole Antennas

Zhongxiang SHEN, Quanxin WANG, Ke-Li WU

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This paper presents a modal-expansion analysis of the electromagnetically coupled coaxial dipole antenna. The analysis of the antenna problem is initially simplified using the even-odd mode excitation and then the resultant half structure is divided into two parts; one is the characterization of a coaxial feeding network and the other is the modeling of a sleeve monopole antenna driven by a coaxial line. The formally exact modal-expansion method is employed to analyze both parts. The analysis of the sleeve monopole antenna is facilitated by introducing a perfectly conducting boundary at a distance from the monopole's top end. The current distribution and input impedance of the electromagnetically coupled coaxial dipole antenna are obtained by finding expansion coefficients through enforcing the continuity of tangential field components across regional interfaces and cascading the two parts together. Numerical results for the coaxial dipole antenna's radiation characteristics are presented and discussed.

Publication: IEICE TRANSACTIONS on Communications Vol.E89-B No.5 pp.1654-1661

Publication Date: 2006/05/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e89-b.5.1654

Type of Manuscript: PAPER

Category: Antennas and Propagation

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Zhongxiang SHEN, Quanxin WANG, Ke-Li WU, "Modal-Expansion Analysis of Electromagnetically Coupled Coaxial Dipole Antennas" in IEICE TRANSACTIONS on Communications, vol. E89-B, no. 5, pp. 1654-1661, May 2006, doi: 10.1093/ietcom/e89-b.5.1654.
Abstract: This paper presents a modal-expansion analysis of the electromagnetically coupled coaxial dipole antenna. The analysis of the antenna problem is initially simplified using the even-odd mode excitation and then the resultant half structure is divided into two parts; one is the characterization of a coaxial feeding network and the other is the modeling of a sleeve monopole antenna driven by a coaxial line. The formally exact modal-expansion method is employed to analyze both parts. The analysis of the sleeve monopole antenna is facilitated by introducing a perfectly conducting boundary at a distance from the monopole's top end. The current distribution and input impedance of the electromagnetically coupled coaxial dipole antenna are obtained by finding expansion coefficients through enforcing the continuity of tangential field components across regional interfaces and cascading the two parts together. Numerical results for the coaxial dipole antenna's radiation characteristics are presented and discussed.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e89-b.5.1654/_p

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@ARTICLE{e89-b_5_1654,
author={Zhongxiang SHEN, Quanxin WANG, Ke-Li WU, },
journal={IEICE TRANSACTIONS on Communications},
title={Modal-Expansion Analysis of Electromagnetically Coupled Coaxial Dipole Antennas},
year={2006},
volume={E89-B},
number={5},
pages={1654-1661},
abstract={This paper presents a modal-expansion analysis of the electromagnetically coupled coaxial dipole antenna. The analysis of the antenna problem is initially simplified using the even-odd mode excitation and then the resultant half structure is divided into two parts; one is the characterization of a coaxial feeding network and the other is the modeling of a sleeve monopole antenna driven by a coaxial line. The formally exact modal-expansion method is employed to analyze both parts. The analysis of the sleeve monopole antenna is facilitated by introducing a perfectly conducting boundary at a distance from the monopole's top end. The current distribution and input impedance of the electromagnetically coupled coaxial dipole antenna are obtained by finding expansion coefficients through enforcing the continuity of tangential field components across regional interfaces and cascading the two parts together. Numerical results for the coaxial dipole antenna's radiation characteristics are presented and discussed.},
keywords={},
doi={10.1093/ietcom/e89-b.5.1654},
ISSN={1745-1345},
month={May},}

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TY - JOUR
TI - Modal-Expansion Analysis of Electromagnetically Coupled Coaxial Dipole Antennas
T2 - IEICE TRANSACTIONS on Communications
SP - 1654
EP - 1661
AU - Zhongxiang SHEN
AU - Quanxin WANG
AU - Ke-Li WU
PY - 2006
DO - 10.1093/ietcom/e89-b.5.1654
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E89-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2006
AB - This paper presents a modal-expansion analysis of the electromagnetically coupled coaxial dipole antenna. The analysis of the antenna problem is initially simplified using the even-odd mode excitation and then the resultant half structure is divided into two parts; one is the characterization of a coaxial feeding network and the other is the modeling of a sleeve monopole antenna driven by a coaxial line. The formally exact modal-expansion method is employed to analyze both parts. The analysis of the sleeve monopole antenna is facilitated by introducing a perfectly conducting boundary at a distance from the monopole's top end. The current distribution and input impedance of the electromagnetically coupled coaxial dipole antenna are obtained by finding expansion coefficients through enforcing the continuity of tangential field components across regional interfaces and cascading the two parts together. Numerical results for the coaxial dipole antenna's radiation characteristics are presented and discussed.
ER -