Artificially anisotropic cylinder to convert omnidirectional linear polarization into circular polarization

Kaivanto, Emmi; Salonen, Erkki; Berg, Markus (2018-05-24)
 
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https://doi.org/10.1049/cp.2017.0295

Kaivanto, Emmi
Salonen, Erkki
Berg, Markus
Institute of Electrical and Electronics Engineers
24.05.2018

E. Kaivanto, E. Salonen and M. Berg, "Artificially anisotropic cylinder to convert omnidirectional linear polarization into circular polarization," Loughborough Antennas & Propagation Conference (LAPC 2017), Loughborough, 2017, pp. 1-4. doi: 10.1049/cp.2017.0295

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doi:https://doi.org/10.1049/cp.2017.0295
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Abstract

Circular polarization and omnidirectional radiation are desired characteristics in various mobile communication systems. This paper studies possibilities to convert linear polarization into circular polarization by designing an artificially anisotropic cylinder around the antenna. The design process and simulated results for the cylinder with a half wave dipole antenna at the centre frequency of 2.3 GHz are presented. It is shown that the cylinder has minor effect on the return loss and gain of the antenna and that axial ratio remains below 5dB over the frequency range of 900MHz.

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