A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics

Silin He; Zhao Wang; Pengjian Gong

doi:10.1109/IMWS-AMP66175.2025.11136735

A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics

Silin He
, Zhao Wang^*
, Pengjian Gong

^*Corresponding author for this work

Sichuan University

Research output: Chapter in Book or Report/Conference proceeding › Conference Proceeding › peer-review

Abstract

A low-profile semi-cylindrical Luneburg lens (LL), fabricated using a novel air material, is proposed through the application of transformation-optics (TO) technique. An air material characterized by its low permittivity (ϵ_r = 1.5) and low dielectric loss (tan δ=0.0008) in the millimeter-wave (mm-wave) band is applied to construct the proposed LL. Traditional flat TO-based LL often suffer from limited size reduction, the need for substrates with higher , and challenges such as long focal lengths, significant reflections. In contrast, the proposed LL achieves a near-surface focal point while reducing the volume by half. To address fabrication issues, the impact of discretization and approximations on the radiation performance has been thoroughly investigated and analyzed. A mm-wave semi-cylindrical LL with a 30 mm radius is designed. The resulting LL antenna is compact, featuring a near-surface focal plane, demonstrating its potential for applications in radar and mm-wave wireless communications.

Original language	English
Title of host publication	2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025
Publisher	Institute of Electrical and Electronics Engineers Inc.
Edition	2025
ISBN (Electronic)	9798331525347
DOIs	https://doi.org/10.1109/IMWS-AMP66175.2025.11136735
Publication status	Published - 2025
Event	2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025 - Wuxi, China Duration: 23 Jul 2025 → 26 Jul 2025

Conference

Conference	2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025
Country/Territory	China
City	Wuxi
Period	23/07/25 → 26/07/25

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10.1109/IMWS-AMP66175.2025.11136735

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He, S., Wang, Z., & Gong, P. (2025). A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics. In 2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025 (2025 ed.). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IMWS-AMP66175.2025.11136735

He, Silin ; Wang, Zhao ; Gong, Pengjian. / A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics. 2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025. 2025. ed. Institute of Electrical and Electronics Engineers Inc., 2025.

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title = "A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics",

abstract = "A low-profile semi-cylindrical Luneburg lens (LL), fabricated using a novel air material, is proposed through the application of transformation-optics (TO) technique. An air material characterized by its low permittivity (ϵr = 1.5) and low dielectric loss (tan δ=0.0008) in the millimeter-wave (mm-wave) band is applied to construct the proposed LL. Traditional flat TO-based LL often suffer from limited size reduction, the need for substrates with higher , and challenges such as long focal lengths, significant reflections. In contrast, the proposed LL achieves a near-surface focal point while reducing the volume by half. To address fabrication issues, the impact of discretization and approximations on the radiation performance has been thoroughly investigated and analyzed. A mm-wave semi-cylindrical LL with a 30 mm radius is designed. The resulting LL antenna is compact, featuring a near-surface focal plane, demonstrating its potential for applications in radar and mm-wave wireless communications.",

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author = "Silin He and Zhao Wang and Pengjian Gong",

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language = "English",

booktitle = "2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025",

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He, S , Wang, Z & Gong, P 2025, A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics. in 2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025. 2025 edn, Institute of Electrical and Electronics Engineers Inc., 2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025, Wuxi, China, 23/07/25. https://doi.org/10.1109/IMWS-AMP66175.2025.11136735

A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics. / He, Silin ; Wang, Zhao; Gong, Pengjian.
2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025. 2025. ed. Institute of Electrical and Electronics Engineers Inc., 2025.

Research output: Chapter in Book or Report/Conference proceeding › Conference Proceeding › peer-review

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T1 - A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics

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PY - 2025

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N2 - A low-profile semi-cylindrical Luneburg lens (LL), fabricated using a novel air material, is proposed through the application of transformation-optics (TO) technique. An air material characterized by its low permittivity (ϵr = 1.5) and low dielectric loss (tan δ=0.0008) in the millimeter-wave (mm-wave) band is applied to construct the proposed LL. Traditional flat TO-based LL often suffer from limited size reduction, the need for substrates with higher , and challenges such as long focal lengths, significant reflections. In contrast, the proposed LL achieves a near-surface focal point while reducing the volume by half. To address fabrication issues, the impact of discretization and approximations on the radiation performance has been thoroughly investigated and analyzed. A mm-wave semi-cylindrical LL with a 30 mm radius is designed. The resulting LL antenna is compact, featuring a near-surface focal plane, demonstrating its potential for applications in radar and mm-wave wireless communications.

AB - A low-profile semi-cylindrical Luneburg lens (LL), fabricated using a novel air material, is proposed through the application of transformation-optics (TO) technique. An air material characterized by its low permittivity (ϵr = 1.5) and low dielectric loss (tan δ=0.0008) in the millimeter-wave (mm-wave) band is applied to construct the proposed LL. Traditional flat TO-based LL often suffer from limited size reduction, the need for substrates with higher , and challenges such as long focal lengths, significant reflections. In contrast, the proposed LL achieves a near-surface focal point while reducing the volume by half. To address fabrication issues, the impact of discretization and approximations on the radiation performance has been thoroughly investigated and analyzed. A mm-wave semi-cylindrical LL with a 30 mm radius is designed. The resulting LL antenna is compact, featuring a near-surface focal plane, demonstrating its potential for applications in radar and mm-wave wireless communications.

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KW - formatting

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BT - 2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025

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Y2 - 23 July 2025 through 26 July 2025

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He S , Wang Z, Gong P. A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics. In 2025 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2025. 2025 ed. Institute of Electrical and Electronics Engineers Inc. 2025 doi: 10.1109/IMWS-AMP66175.2025.11136735

A Low-Profile Air Material Based Semi-Cylindrical Metamaterial Millimeter-Wave Luneburg Lens Antenna Using Transformation-Optics

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