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Ultrawideband Beam Steering at mm-Wave Frequency With Planar Dielectric Phase Transformers.

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Title: Ultrawideband Beam Steering at mm-Wave Frequency With Planar Dielectric Phase Transformers.
Authors: Baba, Affan Aziz1 affan.baba@uts.edu.au, Hashmi, Raheel M.2, Attygalle, Manik3, Esselle, Karu P.1, Borg, Daniel3
Source: IEEE Transactions on Antennas & Propagation. Mar2022, Vol. 70 Issue 3, p1719-1728. 10p.
Subjects: Beam steering, Phase shifters, Ultra-wideband antennas, Directional antennas, Horn antennas, Dielectrics
Abstract: In this article, a new method to design an ultrawideband beam-steering antenna system is presented. The system is completely passive and suitable for millimeter-wave applications, including some in defense, where both discrete beam steering and continuous beam steering in two dimensions (elevation and azimuth) are required at a reasonably fast speed. The beam-steering capability is achieved using a pair of distinct low-profile and planar phase transformers (PPTs) placed in the near-field region of a fixed-beam radiating source. The antenna system demonstrates a steering and impedance-matching bandwidth of 28.6%, from 30 to 40 GHz. A prototype of the new antenna system, including a pair of thin PPTs and a completely automated mechanical system to rotate each of the PPTs around the antenna axis, has been fabricated and tested. The pair of rotating PPTs, equivalent to a pair of 3-D dielectric PTs (DPTs), introduces a precalculated phase gradient to the input near field from the fixed-beam antenna and creates an output near field that will radiate toward a selected direction, which can be varied within a large conical region with a maximum apex angle of 108°. The system exhibits the predicted and measured peak gains of 21.5 and 21.7 dBi, respectively, and the measured gain variation over 2-D beam steering is less than 2.2 dB. This beam-steering method obviates the need for expensive phase shifters and distribution networks, which are also lossy at mm-wave frequencies. The measured results validate the predicted wideband matching and steering performance of the system with a close agreement. [ABSTRACT FROM AUTHOR]
Copyright of IEEE Transactions on Antennas & Propagation is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 155696691
AccessLevel: 6
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  Label: Title
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  Data: Ultrawideband Beam Steering at mm-Wave Frequency With Planar Dielectric Phase Transformers.
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  Data: <searchLink fieldCode="AR" term="%22Baba%2C+Affan+Aziz%22">Baba, Affan Aziz</searchLink><relatesTo>1</relatesTo><i> affan.baba@uts.edu.au</i><br /><searchLink fieldCode="AR" term="%22Hashmi%2C+Raheel+M%2E%22">Hashmi, Raheel M.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Attygalle%2C+Manik%22">Attygalle, Manik</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Esselle%2C+Karu+P%2E%22">Esselle, Karu P.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Borg%2C+Daniel%22">Borg, Daniel</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22IEEE+Transactions+on+Antennas+%26+Propagation%22">IEEE Transactions on Antennas & Propagation</searchLink>. Mar2022, Vol. 70 Issue 3, p1719-1728. 10p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Beam+steering%22">Beam steering</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+shifters%22">Phase shifters</searchLink><br /><searchLink fieldCode="DE" term="%22Ultra-wideband+antennas%22">Ultra-wideband antennas</searchLink><br /><searchLink fieldCode="DE" term="%22Directional+antennas%22">Directional antennas</searchLink><br /><searchLink fieldCode="DE" term="%22Horn+antennas%22">Horn antennas</searchLink><br /><searchLink fieldCode="DE" term="%22Dielectrics%22">Dielectrics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this article, a new method to design an ultrawideband beam-steering antenna system is presented. The system is completely passive and suitable for millimeter-wave applications, including some in defense, where both discrete beam steering and continuous beam steering in two dimensions (elevation and azimuth) are required at a reasonably fast speed. The beam-steering capability is achieved using a pair of distinct low-profile and planar phase transformers (PPTs) placed in the near-field region of a fixed-beam radiating source. The antenna system demonstrates a steering and impedance-matching bandwidth of 28.6%, from 30 to 40 GHz. A prototype of the new antenna system, including a pair of thin PPTs and a completely automated mechanical system to rotate each of the PPTs around the antenna axis, has been fabricated and tested. The pair of rotating PPTs, equivalent to a pair of 3-D dielectric PTs (DPTs), introduces a precalculated phase gradient to the input near field from the fixed-beam antenna and creates an output near field that will radiate toward a selected direction, which can be varied within a large conical region with a maximum apex angle of 108°. The system exhibits the predicted and measured peak gains of 21.5 and 21.7 dBi, respectively, and the measured gain variation over 2-D beam steering is less than 2.2 dB. This beam-steering method obviates the need for expensive phase shifters and distribution networks, which are also lossy at mm-wave frequencies. The measured results validate the predicted wideband matching and steering performance of the system with a close agreement. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of IEEE Transactions on Antennas & Propagation is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1109/TAP.2021.3111637
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 1719
    Subjects:
      – SubjectFull: Beam steering
        Type: general
      – SubjectFull: Phase shifters
        Type: general
      – SubjectFull: Ultra-wideband antennas
        Type: general
      – SubjectFull: Directional antennas
        Type: general
      – SubjectFull: Horn antennas
        Type: general
      – SubjectFull: Dielectrics
        Type: general
    Titles:
      – TitleFull: Ultrawideband Beam Steering at mm-Wave Frequency With Planar Dielectric Phase Transformers.
        Type: main
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          Name:
            NameFull: Baba, Affan Aziz
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            NameFull: Hashmi, Raheel M.
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            NameFull: Attygalle, Manik
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            NameFull: Esselle, Karu P.
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            NameFull: Borg, Daniel
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              M: 03
              Text: Mar2022
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              Y: 2022
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              Value: 70
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            – TitleFull: IEEE Transactions on Antennas & Propagation
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