Dual-frequency Circularly-polarized Patch Antenna with Compact Size and Small Frequency Ratio

Document Type

Article

Rights

Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Disciplines

Electrical and electronic engineering, Communication engineering and systems

Publication Details

IEEE Transactions on Antennas & Propagation, 55, (7), pp.2104 - 2107, ISSN: 0018-926X.

Abstract

A novel probe-fed single-layer annular-ring patch antenna for dual-frequency circular polarization is evaluated numerically and experimentally verified. The proposed antenna consists of a small circular patch surrounded by two concentric annular-rings, which is loaded by an unequal lateral cross-slot ground plane. The circularly-polarized frequency ratio of the two resonant modes is tunable to a small value, suitable for wireless communications systems. The patch size of the proposed antenna is reduced by about 53% compared to the conventional circular patch at a given frequency. The radiation characteristics of the novel antenna are also presented.

DOI

https://doi.org/10.1109/TAP.2007.900271

Funder

Science Foundation Ireland

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