Impact of Phase Shifter Design on Beam Squinting in Phased Array

Impact of Phase Shifter Design on Beam Squinting in Phased Array

2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)

10.1109/APS/URSI47566.2021.9704319

http://dx.doi.org/10.1109/aps/ursi47566.2021.9704319

Ryan Ong, Salahuddin Raju, M. Kumarasamy Raja

Phased array , beam squinting , phase shifter , true time delay , beamforming, Phased arrays , Time-frequency analysis , Quantization (signal) , Limiting , Delay effects , Phase shifters , Meetings

16 February 2022

Ong, R., Raju, S., & Raja, M. K. (2021). Impact of Phase Shifter Design on Beam Squinting in Phased Array. 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI). https://doi.org/10.1109/aps/ursi47566.2021.9704319

Phased array technique is essential for beam-forming and beam-steering in mmWave applications like radar, imaging and 5G. Beam squinting in a phased array is one of the limiting factors to support wide bandwidth operation. This paper discusses the impact of phase shifter design choices on beam squinting in the phased array. Although true time delay circuits can circumvent beam squinting, it becomes impossible when the array size becomes larger as the large slope of phase versus frequency within the bandwidth crosses 360 degrees (1 carrier cycle). A look-up table based reconfigurable phase shifter is proposed to reduce the beam squinting over a large bandwidth and the method is validated by extensive phased array simulation.

Publisher Copyright

This research / project is supported by the A*STAR - GAP
Grant Reference no. : ACCL/19-GAP086-R20A

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