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Abstract
Integrated lens antennas are widely used in high gain and beam steering applications at millimeter-wave frequencies. The ILA has often large height and suffers from significant scan loss. In this article, we demonstrate a low-profile, efficient, and scanloss-reduced integrated metal-lens antenna (IMLA). An IMLA is a combination of a dielectric lens and metal-plate lens. A 16-λ 0 diameter IMLA is designed using the HDPE and 58 stainless steel plates to achieve the f/d of 0.69. The simulated aperture and radiation efficiency of the IMLA are 73% and 92%, respectively. At 76 GHz, the simulated and measured realized gains of the fabricated IMLA are 31.24 and 31 dBi, respectively. The IMLA is designed to steer the main beam to ±30°. The scan loss is reduced by tilting the radiation pattern of the feeds at offset positions along the focal plane. The radiation pattern of the square waveguide feed is tilted using asymmetrical dielectric pins. The asymmetrical dielectric pins reduce the simulated gain scan loss of the IMLA by more than 1.5 dB at 30° steering angle. The simulation results show that the inclination of the feed radiation pattern helps limit the scan loss of the IMLA to 4.1 and 4.3 dB in the H-and E-planes for 30° steering angle, respectively. The measured scan loss of the manufactured IMLA is 3.8 and 6.2 dB in the H-and E-plane, respectively.
Original language | English |
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Pages (from-to) | 876-887 |
Number of pages | 12 |
Journal | IEEE Transactions on Antennas and Propagation |
Volume | 70 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Feb 2022 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Antenna
- Beam switching
- Beam tilt
- Dielectric lens antenna
- High gain antenna
- Low-profile lens
- Matching layers
- Metal-plate lens
- Millimeter-wave frequencies
- Scan loss reduction
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Dive into the research topics of 'Low-Profile Scanloss-Reduced Integrated Metal-Lens Antenna'. Together they form a unique fingerprint.Projects
- 2 Finished
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ADENN: Arrays with deep-neural-network backend for millimeter-wave beamforming applications
Ala-Laurinaho, J. (Principal investigator), Pälli, S.-V. (Project Member), Tamminen, A. (Project Member) & Karki, S. (Project Member)
01/01/2019 → 31/12/2021
Project: Academy of Finland: Other research funding
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5WAVE - RAD
Ala-Laurinaho, J. (Project Member), Viikari, V. (Principal investigator), Semkin, V. (Project Member), Kähkönen, H. (Project Member), Islam, M. (Project Member) & Karki, S. (Project Member)
01/01/2016 → 31/03/2019
Project: Business Finland: Other research funding