W-Band Demonstration of Dynamic, High-Gain Beam Steering with a Scanning Lens Phased Array

Conference paper (2022)

Authors

S. Bosma Tera-Hertz Sensing - EEMCS
N. van Rooijen Tera-Hertz Sensing - EEMCS
M. Alonso Del Pino Tera-Hertz Sensing - EEMCS
M. Spirito Electronics - EEMCS
Nuria Llombart Tera-Hertz Sensing - EEMCS
Research Group
Tera-Hertz Sensing (EEMCS) (TU Delft)
Copyright: © 2022 S. Bosma, N. van Rooijen, M. Alonso Del Pino, M. Spirito, Nuria Llombart
DOI
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https://doi.org/10.1109/IRMMW-THz50927.2022.9895677
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Published Date

2022

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

We report the measured results of a sparse, 4x1 scanning lens phased array prototype at W-band that is capable of beam steering a directive (>30 dBi) beam towards ±20° with sidelobe levels around -10 dB. The array elements are high-aperture-efficiency resonant leaky-wave lens antennas with a feed that suppresses the spurious TM0 mode over a wide bandwidth by using a circular waveguide in a ground plane surrounded by annular corrugations. The scanning lens phased array relies on simultaneous electrical and mechanical phase shifting to steer the beams. We use 15 GHz IQ-mixers followed by x6 multipliers to achieve electronic amplitude and phase control at W-band and a piezo-electric motor for mechanical phase shifting, which allows us to scan this array up to 20°. Measurements at 90 GHz of the lens array are in excellent agreement with simulations. More measurement results will be presented at the conference.