Ultra-compact 90° twist based on a pair of two closely placed flat chiral irises

A. A. Kirilenko; N. G. Kolmakova; S. A. Prikolotin

doi:10.3103/S073527271204005X

Authors

A. A. Kirilenko Usikov Institute of Radiophysics and Electronics of the National Academy of Sciences of Ukraine, Ukraine https://orcid.org/0000-0002-8717-5334
N. G. Kolmakova St. Petersburg State Polytechnical University; Usikov Institute of Radiophysics and Electronics of the National Academy of Sciences of Ukraine, Russian Federation
S. A. Prikolotin Usikov Institute of Radiophysics and Electronics of the National Academy of Sciences of Ukraine, Ukraine

DOI:

https://doi.org/10.3103/S073527271204005X

Keywords:

optical activity, change of the polarization, 2D chirality, rotation symmetry, waveguide iris, square waveguide

Abstract

A new approach to the task of rotating the polarization plane of planar electromagnetic wave or dominant modes in a square (circular) waveguide is suggested. The physical idea is based on strong interaction of near-fields in two flat chiral irises with right and left rotation located at distances that are much less than the wavelength. Due to multi-mode character of the interaction it is possible to provide the several percent bandwidth when rotating the polarization plane by 90° at the level not worse than –0.1 dB.

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