Millimeter-wave antennas for 5G handsets and base stations

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School of Electrical Engineering | Doctoral thesis (article-based) | Defence date: 2020-10-09
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Authors

Date

2020

Department

Elektroniikan ja nanotekniikan laitos
Department of Electronics and Nanoengineering

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Mcode

Degree programme

Language

en

Pages

82 + app. 72

Series

Aalto University publication series DOCTORAL DISSERTATIONS, 141/2020

Abstract

The massive increase in the number of connected devices is making it necessary to use higher frequencies and wider bandwidths. The use of frequencies in the 20-300 GHz will enable achieving higher capacities and data rates. In order to compensate for the higher free-space path loss and increased atmospheric absorption directive antenna elements have to be used and, thus, beam-steering and beam-forming capabilities are needed. In this thesis, mm-wave antennas in the 24-35 GHz range are developed. The designs include both mobile phone and base station antennas since both of them will have to evolve to meet the demands of 5G networks. The first part of this thesis focuses on finding mm-wave antenna solutions for 5G mobile handsets. The mobile phone antennas radiate towards the end-fire direction with respect to the mobile phone. The designs present dual-polarized operation and wide-angle beam-steering for increased reliability. Moreover, the mm-wave antennas are designed so that they do not heavily degrade the performance of the already present sub-6 GHz antennas. The proposed solutions include 3 and 4-element arrays which are either integrated in the metal frame of the mobile phone, or radiate through a small window in it. The second part of this thesis introduces 5G base station antennas and their challenges. The base station antennas presented are scalable in the number of antenna elements in order to adapt to different use cases. Moreover, and as a huge amount of base stations are going to be required with the development of 5G, the antennas are energy efficient and relatively cheap to manufacture. They present beam-steering or beam-switching capabilities in order to keep track of the mobile users, as well as high directivity. The designs presented include an efficient 16-element horn antenna phased-array, and a wide-angle dual-polarized beam-switching lens antenna.

Description

9.10.2020 9:00 – 12:00 via Zoom https://aalto.zoom.us/j/66371586377

Supervising professor

Viikari, Ville, Assoc. Prof., Aalto University, Department of Electronics and Nanoengineering, Finland

Thesis advisor

Ala-Laurinaho, Juha, Dr., Aalto University, Finland

Keywords

antenna, base-station antennas, metal frame, millimeter-wave antennas, mobile phone antennas

Other note

Parts

  • [Publication 1]: Resti Montoya Moreno, Juha Ala-Laurinaho, and Ville Viikari. Rod waveguides as future 5G antennas for mobile devices. Proceedings of the 48th European Microwave Conference, Madrid, Spain, pp. 1081–1084, Sep. 2018.
    Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-201902251843
    DOI: 10.23919/EuMC.2018.8541770 View at publisher
  • [Publication 2]: Resti Montoya Moreno, Juha Ala-Laurinaho, Alexander Khripkov, Janne Ilvonen, and Ville Viikari. Dual-polarized mm-wave end-fire antenna for mobile devices. Submitted to IEEE Transactions on Antennas and Propagation, 11 pages, Nov. 2019.
    DOI: 10.1109/TAP.2020.2989556 View at publisher
  • [Publication 3]: Resti Montoya Moreno, Juha Ala-Laurinaho, and Ville Viikari. Dual- polarized mm-wave antenna solution for mobile phone. Proceedings of the 14th European Conference on Antennas and Propagation (EuCAP 2020), Copenhagen, Denmark, 5 pages, Mar. 2020.
    Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-202008214804
    DOI: 10.23919/EuCAP48036.2020.9135691 View at publisher
  • [Publication 4]: Resti Montoya Moreno, Joni Kurvinen, Juha Ala-Laurinaho, Alexan- der Khripkov, Janne Ilvonen, Jari van Wonterghem, and Ville Viikari. Dual-polarized mm-wave end-fire chain-slot antenna for mobile devices. Submitted to IEEE Transactions on Antennas and Propagation, 10 pages, Dec. 2019.
    DOI: 10.1109/TAP.2020.3001434 View at publisher
  • [Publication 5]: Joni Kurvinen, Resti Montoya Moreno, Anu Lehtovuori, Juha Ala- Laurinaho, Alexander Khripkov, Janne Ilvonen, Jari van Wonterghem, and Ville Viikari. Capacitively-loaded feed line to improve mm-wave and sub-6 GHz antenna co-existence. Submitted to IEEE Transactions onAntennas and Propagation, 8 pages, Dec. 2019.
    Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-202008124714
    DOI: 10.1109/ACCESS.2020.3012773 View at publisher
  • [Publication 6]: Mikko Leino, Resti Montoya Moreno, Juha Ala-Laurinaho, Risto Valkonen, and Ville Viikari. Waveguide-based phased array with integrated element-specific electronics for 28 GHz. IEEE Access, vol. 7, pp. 90045– 90054, Jun. 2019.
    Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-201908154657
    DOI: 10.1109/ACCESS.2019.2925458 View at publisher
  • [Publication 7]: Resti Montoya Moreno, Juha Ala-Laurinaho, and Ville Viikari. Plastic- filled dual-polarized lens antenna for beam-switching in the Ka-band. IEEE Antennas and Wireless Propagation Letters, vol. 18, pp. 2458–2462, Sept. 2019.
    DOI: 10.1109/LAWP.2019.2939901 View at publisher

Citation

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https://urn.fi/URN:ISBN:978-952-64-0045-7

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[diss] Sähkötekniikan korkeakoulu / ELEC