Print Email Facebook Twitter First Demonstration of Dynamic High-Gain Beam Steering With a Scanning Lens Phased Array Title First Demonstration of Dynamic High-Gain Beam Steering With a Scanning Lens Phased Array Author Bosma, S. (TU Delft Tera-Hertz Sensing) van Rooijen, N. (TU Delft Tera-Hertz Sensing) Alonso Del Pino, M. (TU Delft Tera-Hertz Sensing) Spirito, M. (TU Delft Electronics) Llombart, Nuria (TU Delft Tera-Hertz Sensing) Date 2022 Abstract We report on the first demonstration of dynamic beam steering using a scanning lens phased array. A scanning lens phased array relies on a combination of mechanical and electrical phase shifting to dynamically steer a high-gain beam beyond the grating-lobe free region using a sparse array. These two concepts have been demonstrated separately in the past, here we present, for the first time, a prototype demonstration where active mechanical and electrical phase shifting are combined. For this purpose, we have developed a sparse 4x1 scanning lens phased array at W-band (75-110 GHz) capable of beam steering a directive beam (>30 dBi) towards ± 20° with low grating lobe levels (around -10 dB). The lens array is fed by a waveguide-based leaky-wave feeding architecture that illuminates the lenses with high aperture efficiency over a wide bandwidth, which is required in the proposed scanning lens phased array architecture. The electrical phase shifting has been implemented using IQ-mixers around 15 GHz in combination with x6 multipliers to reach the W-band. The mechanical phase shifting relies on a piezo-electric motor, which is able to achieve displacements of the lens array of 6 mm with an accuracy of a few nanometers. The entire active array is calibrated over the air with an ad-hoc quasi-optical measurement setup. Resulting measurements show excellent agreement with the anticipated performance. Subject Beam steeringLens Antennasmillimeter wavesphase shiftingphased arrays To reference this document use: http://resolver.tudelft.nl/uuid:d6623eac-ef97-4f02-8839-b5f9d2d1d6d1 DOI https://doi.org/10.1109/JMW.2022.3179953 ISSN 2692-8388 Source IEEE Journal of Microwaves, 2 (3), 419-428 Part of collection Institutional Repository Document type journal article Rights © 2022 S. Bosma, N. van Rooijen, M. Alonso Del Pino, M. Spirito, Nuria Llombart Files PDF First_Demonstration_of_Dy ... _Array.pdf 3.25 MB Close viewer /islandora/object/uuid:d6623eac-ef97-4f02-8839-b5f9d2d1d6d1/datastream/OBJ/view