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- Title
Use of non‐uniform RIS and parasitic strips to improve antenna CP performance.
- Authors
Zheng, Qi; Guo, Chenjiang; Ding, Jun; Vandenbosch, Guy A.E.
- Abstract
The effect of using a non‐uniform reactive impedance surface (RIS) on the circular polarisation performance of a planar antenna is investigated. It is shown that a very wide axial ratio (AR) bandwidth can be obtained, especially when the RIS is combined with parasitic strips. This result is only possible, thanks to the fact that the RIS is non‐uniform. The technique is demonstrated by designing, building, and measuring a prototype. The simulated impedance bandwidth S11≤−10dB is 43.6% (4.3–6.7GHz), and the simulated 3 dB AR bandwidth is 37.2% (4.6–6.7GHz). The gain variation over the 3 dB AR bandwidth is 3–5.9 dBi. The experimental results are in good agreement with the simulations, validating the new concept.
- Publication
IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2020, Vol 14, Issue 14, p1795
- ISSN
1751-8725
- Publication type
Article
- DOI
10.1049/iet-map.2020.0135