A High Angular Stability, Single-Layer Transmission Linear-to-Circular Polarization Converter for Dual ISM-Band Operationopen access
- Authors
- Vu, Tung-Lam; Seo, Chulhun
- Issue Date
- Mar-2023
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Dual band; Bandwidth; Substrates; Antennas; Polarization; Periodic structures; Metasurfaces; Dual-band antenna; linear-to-circular converter; metasurface; polarization converter
- Citation
- IEEE ACCESS, v.11, pp.30188 - 30196
- Journal Title
- IEEE ACCESS
- Volume
- 11
- Start Page
- 30188
- End Page
- 30196
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/43960
- DOI
- 10.1109/ACCESS.2023.3261563
- ISSN
- 2169-3536
- Abstract
- This paper presents a planar metasurface structure for linear to circular polarization (CP) conversion at the industrial, scientific, and medical bands of 2.4 GHz and 5.8 GHz. The new unit-cell structure consists of two loaded symmetric cross-shaped stubs with a size of 0.26 lambda x 0.26 lambda in a single thin substrate with a thickness of 0.0064 lambda. The design process and parametric study are presented to clarify the operating mechanism for each frequency. The unit-cell element is analyzed and simulated, which exhibits an axial ratio (AR) bandwidth of 15.8% and 12.6% at a 3-dB criterion with the same polarization mode at 2.4 GHz and 5.8 GHz, respectively. The proposed LP-to-CP converter achieves a stable AR bandwidth with an oblique incident angle up to 45 degrees. Moreover, a dual-band linear polarization (LP) antenna is combined with an array of 4 x 4 unit cells to validate the polarization converting ability of the proposed metasurface. The LP-to-CP converter and the antenna are fabricated and measured. The measurement results show that the antenna obtains a good impedance matching and CP waves radiation at 2.33-2.51 GHz and 5.55-5.89 GHz. The integrated antenna with dual-band CP waves radiation is suitable for improving the transmission efficiency in communication and wireless power transfer applications.
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