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Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2012

Wideband 3D Folded Dipole Antenna with Feed Line for Small Terminal

Tsutomu ITO, Mio NAGATOSHI, Shingo TANAKA, Hisashi MORISHITA

Author information

Tsutomu ITO
Department of Electrical and Electronic Engineering, National Defense Academy
Mio NAGATOSHI
Department of Electrical and Electronic Engineering, National Defense Academy
Shingo TANAKA
High-Frequency Communications Research Dept., Yazaki Research and Technology Center, Yazaki Corp.
Hisashi MORISHITA
Department of Electrical and Electronic Engineering, National Defense Academy

Corresponding author

Keywords:3D folded dipole antenna with feed line,wider bandwidth,WiMAX

JOURNALRESTRICTED ACCESS

2013 Volume E96.BIssue 10Pages 2410-2416

DOIhttps://doi.org/10.1587/transcom.E96.B.2410

Details

Published: October 01, 2013Manuscript Received: January 21, 2013Released on J-STAGE: October 01, 2013Accepted: -Advance online publication: -Manuscript Revised: May 20, 2013

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Article overview

Abstract

Folded dipole antenna with feed line (FDAFL) whose relative bandwidth is 65% (VSWR≤3) has been reported as a wideband planar antenna for a small terminal. However, this antenna is constructed outside of the ground plane (50×80mm²) by 12mm. In this study, we analyze the antenna configurations of FDAFL in 3D so that the antenna does not protrude from the ground plane as much as possible. Two different 3D antenna models derived from FDAFL are investigated. The first model is folded over the ground plane, and the second one is folded outside of the ground plane. The relative bandwidth, the VSWR characteristics and radiation patterns are studied. As a result, it is confirmed that antenna prominence could be reduced and broadband characteristics over 74% and 83% are obtained by the 3D models, respectively, which are wider than the bandwidth of conventional 2D model. Thus, FDAFL could be used in both 2D and 3D for a small terminal.

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