A concentric dual split-loop element is designed and investigated for reflectarray antenna design in the emerging 20 GHz and 30 GHz Ka-band satellite communication spectrum. The element is capable of providing adjustment of the phase of reflection coefficients for circular plane waves in two separate frequency bands, by rotation of the individual split-loops. Cross-polar reflection is simultaneously minimized by optimizing the gaps in the split-loops. Based on the element characteristics, an iterative design procedure is proposed and used to design a front-fed reflectarray antenna. The aperture efficiency exceeds 56% with an on-axis axial ratio below 0:21 dB in both frequency bands.
Proceedings of 34th Esa Antenna Workshop, 2012
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34th ESA Antenna Workshop and 2nd Evolutions in Satellite Telecommunication Ground Segments Workshop on Satcom User Terminal Antennas, 2012