Design of Aperture-Coupled Vivaldi-Antenna Array With Scan-Range-Improving Parasitic Resonators for Ka-Band

Jan H.S. Bergman; Mikko Heino; Juha Ala-Laurinaho; Taneli Riihonen; Mikko Valkama; Ville Viikari

doi:10.1109/TAP.2025.3576489

Design of Aperture-Coupled Vivaldi-Antenna Array With Scan-Range-Improving Parasitic Resonators for Ka-Band

Jan H.S. Bergman^*
, Mikko Heino
, Juha Ala-Laurinaho
, Taneli Riihonen
, Mikko Valkama
, Ville Viikari

^*Corresponding author for this work

Not published at VTT

Aalto University
Tampere University

Research output: Contribution to journal › Article › Scientific › peer-review

1 Citation (Scopus)

Abstract

We present a linear Vivaldi-antenna array with a misalignment-robust nongalvanic transition and scan-range-improving parasitic resonators for 5G FR2-1 base-station applications. The array covers most of the Ka-band (26.5–40 GHz) on a scan range of ±60° with a total active reflection coefficient of below −10 dB and a scan gain of above 10 dBi. Furthermore, the parasitic resonators increase the scan range to ±85° between 30 and 35 GHz. A prototype of the array is measured and the performance is confirmed to coincide well with the simulations.

Original language	English
Pages (from-to)	6955-6960
Journal	IEEE Transactions on Antennas and Propagation
Volume	73
Issue number	9
DOIs	https://doi.org/10.1109/TAP.2025.3576489
Publication status	Published - 2025
MoE publication type	A1 Journal article-refereed

Funding

This work was supported by ENTRY100GHz CELTIC-NEXT Project under Grant 42112/31/2020. The work of Jan H. S. Bergman was supported in part by Walter Ahlström Foundation, in part by Helsingin Puhelinyhdistys (HPY) Research Foundation, and in part by the Nokia Foundation. The authors would like to thank Aspocomp for manufacturing the PCBs, 3DStep for manufacturing the 3-D-printed antennas, and Matti Vaaja and Antti Kuhlberg for helping to assemble the prototype. Research infrastructure was provided by Aalto Electronics-ICT.

Keywords

3-D-printable antennas
antenna arrays
aperture-coupled transitions
millimeter-wave antennas
parasitic resonators

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10.1109/TAP.2025.3576489

Cite this

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title = "Design of Aperture-Coupled Vivaldi-Antenna Array With Scan-Range-Improving Parasitic Resonators for Ka-Band",

abstract = "We present a linear Vivaldi-antenna array with a misalignment-robust nongalvanic transition and scan-range-improving parasitic resonators for 5G FR2-1 base-station applications. The array covers most of the Ka-band (26.5–40 GHz) on a scan range of ±60° with a total active reflection coefficient of below −10 dB and a scan gain of above 10 dBi. Furthermore, the parasitic resonators increase the scan range to ±85° between 30 and 35 GHz. A prototype of the array is measured and the performance is confirmed to coincide well with the simulations.",

keywords = "3-D-printable antennas, antenna arrays, aperture-coupled transitions, millimeter-wave antennas, parasitic resonators",

author = "Bergman, \{Jan H.S.\} and Mikko Heino and Juha Ala-Laurinaho and Taneli Riihonen and Mikko Valkama and Ville Viikari",

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year = "2025",

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AU - Heino, Mikko

AU - Ala-Laurinaho, Juha

AU - Riihonen, Taneli

AU - Valkama, Mikko

AU - Viikari, Ville

PY - 2025

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AB - We present a linear Vivaldi-antenna array with a misalignment-robust nongalvanic transition and scan-range-improving parasitic resonators for 5G FR2-1 base-station applications. The array covers most of the Ka-band (26.5–40 GHz) on a scan range of ±60° with a total active reflection coefficient of below −10 dB and a scan gain of above 10 dBi. Furthermore, the parasitic resonators increase the scan range to ±85° between 30 and 35 GHz. A prototype of the array is measured and the performance is confirmed to coincide well with the simulations.

KW - 3-D-printable antennas

KW - antenna arrays

KW - aperture-coupled transitions

KW - millimeter-wave antennas

KW - parasitic resonators

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JO - IEEE Transactions on Antennas and Propagation

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Design of Aperture-Coupled Vivaldi-Antenna Array With Scan-Range-Improving Parasitic Resonators for Ka-Band

Abstract

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Keywords

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