PCB-Based Dual-Polarized Liquid Crystal Reflectarray With High Aperture Efficiency and Bridge-Shaped Biasing Topology for 2D Scanning
This paper presents a novel dual-linearly polarized liquid crystal reflectarray antenna (DLP-LCRA) based on a printed circuit board (PCB) process. The proposed design employs a bridge-shaped biasing topology to reduce RF losses typically associated with bias lines in PCB-based implementations. While...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/11044327/ |
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| Summary: | This paper presents a novel dual-linearly polarized liquid crystal reflectarray antenna (DLP-LCRA) based on a printed circuit board (PCB) process. The proposed design employs a bridge-shaped biasing topology to reduce RF losses typically associated with bias lines in PCB-based implementations. While conventional DLP-LCRAs are often fabricated using glass substrates due to the difficulty of achieving sufficiently thin bias lines in PCB processes, this work demonstrates that a cost-effective and practical solution is possible through optimized biasing structures. The proposed reflectarray cell structure and biasing scheme enable wide 2D beam scanning with high aperture efficiency. Specifically, the bridge-shaped topology mitigates polarization-dependent RF losses and supports broad beam coverage in the E-, H-, and D-planes. The influence of the biasing layer is analyzed in detail using an equivalent circuit model for TE and TM modes. Experimental results validate the performance of the proposed DLP-LCRA, achieving a maximum aperture efficiency of 46.5 %, which represents a 106.67 % improvement over state-of-the-art designs. |
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| ISSN: | 2169-3536 |