Dual-Band Circularly Polarized Antennas Using Stacked Patches With Asymmetric U-Slots

In this letter, a new design for single-feed dual-band circularly polarized microstrip antennas is presented. A stacked- patch configuration is used for the antenna, and circular polarization is achieved by designing asymmetrical U-slots on the patches. The dimensions of the U-slots are optimized to...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2011, Vol.10, p.492-495
Main Authors: Nayeri, Payam, Kai-Fong Lee, Elsherbeni, Atef Z., Fan Yang
Format: Article
Language:English
Subjects:
Antenna measurements
Bandwidth
Circular polarization
Dual band
Microstrip
Microstrip antennas
stacked patch
U-slot
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Description
Summary:In this letter, a new design for single-feed dual-band circularly polarized microstrip antennas is presented. A stacked- patch configuration is used for the antenna, and circular polarization is achieved by designing asymmetrical U-slots on the patches. The dimensions of the U-slots are optimized to achieve circular polarization in both bands. A prototype has been designed to operate at two frequencies with a ratio of 1.66. Both experimental and theoretical results are presented and discussed. The circularly polarized bandwidth of the antenna is 1.0% at 3.5 GHz (WiMax) and 3.1% at 5.8 GHz (HiperLAN).
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2011.2153820