Anisotropic Circularly Polarising Graded Index Lenses Enabling High Gain CP Antennas

Thomas Whittaker, Evangelos Vassos, Alexandros Feresidis, William G. Whittow

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper presents the theory and design of a circularly polarising lens utilising anisotropic metamaterials. This design combines the functionality of a lens and a polarisation converter into a single device which cuts down on cost, size, weight and material losses. Theory of the design is presented along with a simulated demonstrator. Anisotropic metamaterials are utilised to create a 90° phase shift between orthogonal wave components to generate circular polarisation. The lens can be fed with a wide range on antenna sources angled at a 45° offset. An example lens was designed in the K-band (18-30 GHz) and was capable of achieving high directivity values, between 22.8 dBi and 23.3 dBi, with a wide circular polarisation bandwidth of 9.8 GHz.
Original languageEnglish
Title of host publication18th European Conference on Antennas and Propagation, EuCAP 2024
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9788831299091
ISBN (Print)9798350394436
Publication statusPublished - 26 Apr 2024
Externally publishedYes
Event18th European Conference on Antennas and Propagation - Glasgow, United Kingdom
Duration: 17 Mar 202422 Mar 2024
Conference number: 18


Conference18th European Conference on Antennas and Propagation
Abbreviated titleEuCAP 2024
Country/TerritoryUnited Kingdom
Internet address

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