Lenses for Circular Polarization Using Planar Arrays of Rotated Passive Elements

By R. H. Phillion, Michal M. Okoniewski. IEEE Transactions on Antennas and Propagation, 2011

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A Double-Layer Transmitarray Antenna Using Malta Crosses With Vias (2016, methodology): “By employing the element rotation technique, phase adjustability was achieved for circularly polarized fields [8], [9], [12], [13].”
Using Reconfigurable Transmitarray to Achieve Beam-Steering and Polarization Manipulation Applications (2015, methodology): “In [26] and [27], the element rotation technique was adopted for converting the linearly polarized (LP) wave into circularly polarized (CP) wave.”
Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review (2013, methodology): “Fixed CP array lenses have been explored that incur the phase shift by manipulating the LP components of a CP wave [27] or by employing the element rotation technique [100]–[102].”
Wideband 400-Element Electronically Reconfigurable Transmitarray in X Band (2013, background): “Printed circuit board (PCB) technologies are often preferred to build the antenna stack-up, and various approaches using via holes [8], [9], delay lines [10], [11] or coupling slots [12] have been implemented to connect the and printed arrays.”