2 &#x00D7; 2 Lens Array Antenna Using Square-Bottom Concave-Convex Lens in 300-GHz Band

Bazilah Baharom; Yoshiki Sugimoto; Bakar Rohani; Kunio Sakakibara; Nobuyoshi Kikuma; Yoshihide Yamada; Nurul Huda Abd Rahman

doi:10.1109/OJAP.2023.3325055

IEEE Open Journal of Antennas and Propagation (Jan 2023)

2 × 2 Lens Array Antenna Using Square-Bottom Concave-Convex Lens in 300-GHz Band

Bazilah Baharom,
Yoshiki Sugimoto,
Bakar Rohani,
Kunio Sakakibara,
Nobuyoshi Kikuma,
Yoshihide Yamada,
Nurul Huda Abd Rahman

Affiliations

Bazilah Baharom: ORCiD; Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya, Japan
Yoshiki Sugimoto: ORCiD; Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya, Japan
Bakar Rohani: Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya, Japan
Kunio Sakakibara: ORCiD; Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya, Japan
Nobuyoshi Kikuma: ORCiD; Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya, Japan
Yoshihide Yamada: Malaysia Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia
Nurul Huda Abd Rahman: ORCiD; Antenna Research Center, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam, Malaysia

DOI: https://doi.org/10.1109/OJAP.2023.3325055
Journal volume & issue: Vol. 4
pp. 1074 – 1086

Abstract

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A $2\times2$ lens array provides a half reduction of antenna height compared to the twice-diameter single-feed lens antenna with an almost similar gain performance due to the same aperture size. However, it generally suffers from a non-uniform amplitude distribution of each lens, which degrades the overall lens antenna performance. This study proposes a $2\times2$ lens array antenna composed of square-bottom lenses with a concave-convex lens shaping design to improve the uniformity and aperture efficiency. The measured results of the proposed $2\times2$ square-bottom concave-convex lens array antenna with a lens height of 9.74 mm achieved a boresight gain of 34.9 dBi, and the lowest sidelobe level observed was greater than −12 dB in the 300-GHz band.

Published in IEEE Open Journal of Antennas and Propagation

ISSN: 2637-6431 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Telecommunication
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8566058

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