What is it about?
A Luneburg lens is a classical lens that focuses a plane wave to a point, or converts a point source to a plane wave. It is usually implemented as a spherical graded index lens, but can be made flat using spatial transformations (transformation electromagnetics), at the cost of changing the material properties as a function of space. This was implemented using composite dielectrics and tested using a commercially-available transceiver kit at 60 GHz, for potential use in 5G and beyond.
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Why is it important?
Demonstrating broadband, low-loss, and compact beam-steering gives a route for future wireless networks at high frequencies.
Perspectives
To be honest, this paper is far from what I hoped for when we first started writing it. We were expecting to have measured antenna results and some system analysis, but problems in getting accurate measurements meant it was submitted without these things, and it is a weaker paper because of this. It would be fine as a conference paper, I think, but it does not really show the value of what we have been working on. We hope to rectify that with a future paper once all measurements are completed.
Dr Robert N Foster
University of Birmingham
Read the Original
This page is a summary of: Beam-Steering Performance of Flat Luneburg Lens at 60 GHz for Future Wireless Communications, International Journal of Antennas and Propagation, January 2017, Hindawi Publishing Corporation,
DOI: 10.1155/2017/7932434.
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