Optimized 90° Polarization Shift Step Twists for Ku, K and Ka Bands

Authors: Salis, Vasilis; Mallios, Sotirios; Tigelis, Ioannis; Theodorou, Aristidis

Source: International Journal of Infrared and Millimeter Waves, Volume 28, Number 4, April 2007 , pp. 291-298(8)

Publisher: Springer

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Abstract:

Optimized models for 90° polarization shift step twists for Ku, K and Ka bands are presented. The cross-section of the waveguide employed is similar to that of a rectangular one, with the difference that the walls of the shorter side are part of a circular one with the proper diameter. The optimized models have been found using the CST Microwave Studio simulation tool and in all cases the return loss is kept below -20 dB for a wide range of frequency spectrum. Two examples are given, one for Ku band and the other for K and Ka ones.

Keywords: 90° polarization twists; Rectangular waveguide twists; Waveguide discontinuities; Broadband twists

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s10762-007-9209-9

Affiliations: 1: Email: itigelis@phys.uoa.gr

Publication date: 2007-04-01