期刊
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
卷 26, 期 10, 页码 759-761出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2016.2605454
关键词
Birefringence; dielectric frequency selective surfaces; polarimetry; polarization conversion
资金
- FP7 project DORADA [IAPP-2013-610691]
- EPSRC [EP/L015110/1]
- Engineering and Physical Sciences Research Council [1662880] Funding Source: researchfish
In this contribution, a mm-wave all-dielectric linear-to-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.
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