Reconfigurable Folded Reflectarray Antenna Based Upon Liquid Crystal Technology

By S. Bildik, S. Dieter, C. Fritzsch, Wolfgang Menzel, Rolf Jakoby. IEEE Transactions on Antennas and Propagation, 2015

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1 Bit Electronically Reconfigurable Folded Reflectarray Antenna Based on p-i-n Diodes for Wide-Angle Beam-Scanning Applications (2020, background): “Beam-steerable folded reflectarray antennas [9], [17], [18] were also studied, which are based on the mechanic scanning [17], the liquid crystal technology [9], and multilayer microstrip antennas with SiGe monolithic microwave integrated circuits (MMICs) and the necessary digital control circuits [1”
A 1-Bit $10 \times 10$ Reconfigurable Reflectarray Antenna: Design, Optimization, and Experiment (2016, methodology): “References [26] and [27] demonstrated RRAs with 16× 16 ele-”
A 1600-Element Dual-Frequency Electronically Reconfigurable Reflectarray at X/Ku-Band (2017, methodology): “ning beams were shown by applying varactors [7], [12], [13] or liquid crystals [14], [15].”
Design and Demonstration of an Electronically Scanned Reflectarray Antenna at 100 GHz Using Multiresonant Cells Based on Liquid Crystals (2015, background): “An LC-reconfigurable reflectarray at 78 GHz has been proposed in a folded configuration [8] to provide beam scanning in one plane with higher gain (25 dBi).”