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Dual-band Omnidirectional Circularly Polarized Antenna
Articles
  • Adam Narbudowicz, Dublin Institute of Technology
  • Xiulong Bao, Dublin Institute of Technology
  • Max Ammann, Dublin Institute of Technology
Document Type
Article
Publication Date
2013-1-1
Rights
This item is available under a Creative Commons License for non-commercial use only
Publication Details

IEEE Transactions on Antennas & Propagation, vol. 61, issue 1, pp. 77-83, 01/2013.

Abstract

A dual-band omnidirectional circularly polarized antenna is proposed. The antenna comprises back-to-back microstrip patches fed by a coplanar waveguide. A very low frequency ratio of 1.182 has been achieved, which can be easily tuned by adjusting four lumped capacitors incorporated into the antenna. An analysis of the omnidirectional circular polarization mechanism as well the dual band operation is provided and confirmed by numerical and experimental data. Key parameters to tune the resonant frequencies and the axial ratio have been identified. The prototype antenna provides omnidirectional circular polarization in one plane with cross polar isolation better than 12 dB for both frequency bands.

DOI
10.1109/APMC.2012.6421505
Citation Information
Narbudowicz, A., Bao, X. L., & Ammann, M. J. (2013) Dual-band Omnidirectional Circularly Polarized Antenna, IEEE Transactions on Antennas & Propagation, vol. 61, issue 1, pp. 77-83, 01/2013. doi:10.1109/APMC.2012.6421505