Using near-field coupled circularly polarised antennas as frequency-independent variable phase shifters

TitleUsing near-field coupled circularly polarised antennas as frequency-independent variable phase shifters
Publication TypeJournal Article
Year of Publication2014
AuthorsSipal, V, Narbudowicz, A, Ammann, MJ
Journal TitleElectronics Letters
Volume50
Issue11
Pagination788-790
Journal Date05/2014
ISSN Number0013-5194
Abstract

A novel concept of frequency-independent variable phase shifters is introduced. It is based on the use of circularly polarised (CP) antennas coupled in the near-field. For transmission between two CP antennas in the far-field, a rotation around the boresight axis produces a phase change in the transfer function. This concept is exploited and validated also for near-field coupling between two CP antennas. Therefore, two close-coupled CP antennas can act as an adjustable phase shifter with the phase shift controlled by the angle between the structures. The bandwidth depends on the CP bandwidth of the antenna. This concept is valuable for future phase shifters in millimetre-wave applications where rotation can be facilitated by MEMS elements.

Notes

https://www.researchgate.net/publication/263094077_Using_near-field_coup...

URLhttp://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6824356
DOI10.1049/el.2014.0874
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Funder

Irish Research Council, Science Foundation Ireland, and COST Vista EU

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