Experimental validation of all-dielectric mm-wave polarization conversion based on form birefringence

María Lorente Crespo, Guillem Ballesteros-Garcia, George Goussetis, Carolina Mateo-Segura

Research output: Contribution to journalArticle

6 Citations (Scopus)
73 Downloads (Pure)

Abstract

In this contribution, a mm-wave all-dielectric linearto-circular polarization converter is reported for the first time. The proposed converter consists of a periodic stack of isotropic dielectric substrates that produces form birefringence. By virtue of the anisotropy of the permittivity tensor, the phase-shift introduced between two orthogonally linearly polarized transmitted electromagnetic waves can be controlled, enabling linear to circular polarization conversion. Due to its all-dielectric nature, the proposed polarization converter circumvents oxidation, corrosion and power handling problems associated with metallic structures. Our measurements demonstrate 17% 1dB axial ratio fractional bandwidth and 39% below 3dB, while measured insertion loss is 0.6dB at the operating frequency. The proposed polarization converter further benefits from angularly stable response up to 40 degrees.
Original languageEnglish
Article number7572992
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume26
Issue number10
DOIs
Publication statusPublished - 21 Sep 2016

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