Wideband and high-gain composite cavity-backed crossed triangular bowtie dipoles for circularly polarized radiation
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 5498953 |
Pages (from-to) | 3157-3164 |
Journal / Publication | IEEE Transactions on Antennas and Propagation |
Volume | 58 |
Issue number | 10 |
Publication status | Published - Oct 2010 |
Link(s)
Abstract
A composite cavity-backed antenna excited by crossed triangular bowtie dipoles is proposed and investigated for circular polarization (CP) applications. It is fed by a novel balun, i.e., a transition from a microstrip line to double slot lines, providing symmetrical electric field distributions at the feeding port. Measurements of an optimized antenna prototype show that it can achieve an impedance bandwidth of over 57.6% for SWR ≤ 2;, a 3-dB axial-ratio bandwidth of 39%, a broadside gain of 8-10.7 dBi, and symmetrical radiation patterns over the whole operating band. The operating principles of the proposed antenna are analyzed carefully and found quite different from crossed thin-wire dipoles with very weak coupling. Problems in the feeding balun, greatly deteriorating the CP performance at the resonance, are clearly addressed and solved. Detailed parametric studies are given in the final part of this paper. © 2010 IEEE.
Research Area(s)
- Bowtie antennas, cavity-backed antennas, circular polarization, unidirectional patterns
Citation Format(s)
Wideband and high-gain composite cavity-backed crossed triangular bowtie dipoles for circularly polarized radiation. / Qu, Shi-Wei; Chan, Chi Hou; Xue, Quan.
In: IEEE Transactions on Antennas and Propagation, Vol. 58, No. 10, 5498953, 10.2010, p. 3157-3164.
In: IEEE Transactions on Antennas and Propagation, Vol. 58, No. 10, 5498953, 10.2010, p. 3157-3164.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review