Wideband and unidirectional cavity-backed folded triangular bowtie antenna

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)1259-1263
Journal / PublicationIEEE Transactions on Antennas and Propagation
Volume57
Issue number4 PART 2
Publication statusPublished - 2009

Abstract

In this paper, a cavity-backed folded triangular bowtie antenna (FTBA) is proposed and investigated. Comparisons show that it has much smaller fluctuation of input impedance and much larger bandwidth (BW) for stable radiation patterns than cavity-backed ordinary TBA. The proposed antenna is fed by a conventional balun composed of a transition from a microstrip line to a parallel stripline. It achieves an impedance BW of 92.2% for S11 ≤ -10 dB, stable gain of around 9.5 dBi and unidirectional radiation patterns over the whole operating band. A close examination of the antenna aperture efficiency and the electric field distribution in the aperture provides an explanation for the stable gain across such large frequency band. Comparisons are made against several conventional antennas, including short backfire and microstrip patch antennas, to illustrate the salient features of the proposed antenna. A design guideline is also given for practical applications. © 2009 IEEE.

Research Area(s)

  • Bowtie antennas, Cavity-backed antennas, Unidirectional patterns, Wideband antennas

Citation Format(s)

Wideband and unidirectional cavity-backed folded triangular bowtie antenna. / Qu, Shi-Wei; Li, Jia-Lin; Xue, Quan; Chan, Chi Hou; Li, Simin.

In: IEEE Transactions on Antennas and Propagation, Vol. 57, No. 4 PART 2, 2009, p. 1259-1263.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review