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Filtenna-Oriented Mode Control and Resonance Fusion in Square SIW Cavities for 5G Millimeter-Wave Applications

Li, Jiawang LU orcid and Cao, Yu Yan LU (2025) In IEEE Antennas and Wireless Propagation Letters
Abstract

This paper presents a single-layer filtering antenna (filtenna) based on a compact square substrate-integrated waveguide (SIW) cavity for millimeter-wave (mmWave) applications. The cavity operates in the fundamental TE110 mode to enable beam scanning, while a central shorting via introduces the TE210 mode, broadening the bandwidth. A radiating slot, placed at high-intensity regions of both modes, perturbs surface currents and facilitates efficient radiation. The resulting dual-mode resonance forms a bandpass response suited for mmWave communication. Two filtenna prototypes with different out-of-band suppression levels are implemented. Measurements show -10 dB impedance bandwidths of 7.1% (29.81-32.01 GHz) and 8.9% (29.05-31.74 GHz) for... (More)

This paper presents a single-layer filtering antenna (filtenna) based on a compact square substrate-integrated waveguide (SIW) cavity for millimeter-wave (mmWave) applications. The cavity operates in the fundamental TE110 mode to enable beam scanning, while a central shorting via introduces the TE210 mode, broadening the bandwidth. A radiating slot, placed at high-intensity regions of both modes, perturbs surface currents and facilitates efficient radiation. The resulting dual-mode resonance forms a bandpass response suited for mmWave communication. Two filtenna prototypes with different out-of-band suppression levels are implemented. Measurements show -10 dB impedance bandwidths of 7.1% (29.81-32.01 GHz) and 8.9% (29.05-31.74 GHz) for Filtenna I and II, respectively. Both designs exhibit stable radiation patterns with an average gain of approximately 4.9 dBi, and sideband rejections exceeding 25 dB at the lower side and 20 dB at the upper side. The proposed design eliminates the need for separate filtering circuits, thereby reducing system complexity and insertion loss. Its integration-friendly structure makes it particularly suitable for compact front-end modules in next-generation mmWave communication systems.

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organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Filtenna, mmWave, sideband rejection level, SIW
in
IEEE Antennas and Wireless Propagation Letters
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:105014613987
ISSN
1536-1225
DOI
10.1109/LAWP.2025.3604063
language
English
LU publication?
yes
id
1f25d6ff-d798-44c1-a346-259e9c4a6d11
date added to LUP
2025-11-17 09:51:17
date last changed
2025-11-17 09:52:28
@article{1f25d6ff-d798-44c1-a346-259e9c4a6d11,
  abstract     = {{<p>This paper presents a single-layer filtering antenna (filtenna) based on a compact square substrate-integrated waveguide (SIW) cavity for millimeter-wave (mmWave) applications. The cavity operates in the fundamental TE110 mode to enable beam scanning, while a central shorting via introduces the TE210 mode, broadening the bandwidth. A radiating slot, placed at high-intensity regions of both modes, perturbs surface currents and facilitates efficient radiation. The resulting dual-mode resonance forms a bandpass response suited for mmWave communication. Two filtenna prototypes with different out-of-band suppression levels are implemented. Measurements show -10 dB impedance bandwidths of 7.1% (29.81-32.01 GHz) and 8.9% (29.05-31.74 GHz) for Filtenna I and II, respectively. Both designs exhibit stable radiation patterns with an average gain of approximately 4.9 dBi, and sideband rejections exceeding 25 dB at the lower side and 20 dB at the upper side. The proposed design eliminates the need for separate filtering circuits, thereby reducing system complexity and insertion loss. Its integration-friendly structure makes it particularly suitable for compact front-end modules in next-generation mmWave communication systems.</p>}},
  author       = {{Li, Jiawang and Cao, Yu Yan}},
  issn         = {{1536-1225}},
  keywords     = {{Filtenna; mmWave; sideband rejection level; SIW}},
  language     = {{eng}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Antennas and Wireless Propagation Letters}},
  title        = {{Filtenna-Oriented Mode Control and Resonance Fusion in Square SIW Cavities for 5G Millimeter-Wave Applications}},
  url          = {{http://dx.doi.org/10.1109/LAWP.2025.3604063}},
  doi          = {{10.1109/LAWP.2025.3604063}},
  year         = {{2025}},
}