Single-Layer Broadband Circularly Polarized Reflectarray with Subwavelength Double-Ring Elements
- 27 April 2015
- journal article
- research article
- Published by Taylor & Francis in Electromagnetics
- Vol. 35 (4), 217-226
- https://doi.org/10.1080/02726343.2015.1027632
Abstract
A single-layer broadband circularly polarized reflectarray with subwavelength double-ring elements is presented in this article. Compared to conventional λ/2 elements, the subwavelength one can obtain a better circular polarization performance. Then, by using angular rotation technique, a reflectarray with this type of elements is designed and implemented. The fabricated reflectarray demonstrates excellent performance of 40% 3-dB axial ratio bandwidth and 19.1% 1-dB gain bandwidth, respectively. Moreover, the highest aperture efficiency can reach as large as 50%.Keywords
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