Enhancing 2-D Beam Scanning Capability through Extended Transmission Paths in a Liquid Crystal-Based Transmitarray Antenna for mmWave Communications
This paper introduces a novel method for implementing a liquid crystal-based transmitarray (LCTA) antenna with two-dimensional (2D) beam scanning capability for the first time. Extending the phase tuning range of LCTA unit cells faces a crucial limitation in maintaining a thin single liquid crystal...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Korean Institute of Electromagnetic Engineering and Science
2025-01-01
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| Series: | Journal of Electromagnetic Engineering and Science |
| Subjects: | |
| Online Access: | https://www.jees.kr/upload/pdf/jees-2025-1-r-281.pdf |
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| Summary: | This paper introduces a novel method for implementing a liquid crystal-based transmitarray (LCTA) antenna with two-dimensional (2D) beam scanning capability for the first time. Extending the phase tuning range of LCTA unit cells faces a crucial limitation in maintaining a thin single liquid crystal (LC) layer because the tuning range is significantly dependent on the LC thickness. The proposed transmission line-based unit cell design could overcome this limitation due to its horizontal propagation characteristic among the LC layers. Therefore, the proposed LCTA unit cell achieves a phase tuning range of 130° while maintaining the thickness of the LC under 0.25 mm at 28 GHz. Furthermore, a 10 × 10 array design is fabricated and measured to verify its 2D beam scanning capability. Consequently, the maximum scanning angle of 30° is obtained in the E-plane and H-plane from measurements. Comparative results with previous studies also emphasize the advantages of the proposed design. |
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| ISSN: | 2671-7255 2671-7263 |