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Thinned array distribution with grating lobe canceller at any scan angle for automotive radar applications

Published online by Cambridge University Press:  30 January 2024

Masato Kohtani Open the ORCID record for Masato Kohtani [Opens in a new window] ,
Sungwoo Cha ,
Paul Schmalenberg Open the ORCID record for Paul Schmalenberg [Opens in a new window] ,
Jae Lee Open the ORCID record for Jae Lee [Opens in a new window] ,
Linjie Li ,
Toshihiko Takahata ,
Shinji Yamaura Open the ORCID record for Shinji Yamaura [Opens in a new window] ,
Toshihiko Matsuoka  and
Gabriel M. Rebeiz Open the ORCID record for Gabriel M. Rebeiz [Opens in a new window]
Masato Kohtani*
Affiliation:
MIRISE Technologies Corporation, Sensor R&D Division, Tokyo, Japan
Sungwoo Cha
Affiliation:
MIRISE Technologies Corporation, Sensor R&D Division, Tokyo, Japan
Paul Schmalenberg
Affiliation:
Toyota Research Institute of North America, Electronics Research Department, MI, USA
Jae Lee
Affiliation:
Toyota Research Institute of North America, Electronics Research Department, MI, USA
Linjie Li
Affiliation:
University of California, San Diego, CA, USA
Toshihiko Takahata
Affiliation:
MIRISE Technologies Corporation, Sensor R&D Division, Tokyo, Japan
Shinji Yamaura
Affiliation:
MIRISE Technologies Corporation, Sensor R&D Division, Tokyo, Japan
Toshihiko Matsuoka
Affiliation:
MIRISE Technologies Corporation, Sensor R&D Division, Tokyo, Japan
Gabriel M. Rebeiz
Affiliation:
University of California, San Diego, CA, USA
*
Corresponding author: Masato Kohtani; Email: masato.kohtani.j3a@mirise-techs.com
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Abstract

A novel thinned antenna element distribution for cancelling grating lobes (GLs) as well as for reducing phase shifters (PSs) is presented for a two-dimensional phased-array automotive radar application. First, an efficient clustering technique of vertical adjacent elements is employed with array thinning for a PS reduction of 66.7%. In the proposed distribution, several single-element radiators (non-clustered antenna elements) are placed in the vertical direction with specific spacing in a grid of 16 × 12 (192) elements with λ/2 pitch. This disrupts the periodicity of phase-centers after element-clustering and takes a role as steerable GL canceller with capabilities of tracking and nullifying the GL at any scan angle. The proposed distribution enables beam steering up to ±60° in the azimuth plane, as well as ±25° in the elevation plane with cancelled GL and sidelobes. Furthermore, the proposed distribution has been efficiently calibrated with all elements activated by introducing the code division multiple access technique. To the best of the authors’ knowledge, this work represents the first fully calibrated state-of-the-art thinned distribution phased-array including a novel steerable GL canceller to track and nullify GLs.

Keywords

beam steeringcalibrationphased arraysradar antennas
Type
Industrial and Engineering Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 13
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with the European Microwave Association

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