Design and Fabrication of Engineered Reflector for Wideband Linear-to-Circular Polarization Converter

Ibrahim, Mourad S.; Moharram, M. A.; Awamry, Amr A.; Jiang, Zhi Hao; Wang, Hong; Al-Nuaimi, Mustafa K. Taher

doi:10.1109/apusncursinrsm.2019.8888310

Cited by 6 publications

References 5 publications

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Novel broadband angular stable linear‐circular and linear‐cross polarizer based on inductive grid loaded H‐dipole in both reflection and transmission modes

Shukoor

Dey

2022

Int J RF Mic Comp-Aid Eng

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A novel broadband linear‐circular and linear‐cross polarization converter for K to Ka‐band applications is demonstrated in this work. The proposed structure primarily consists of an inductive grid in orthogonal with an H‐shaped dipole as top Frequency Selective Surface (FSS) and a modified horizontal dipole as bottom FSS; a 1 mm thin FR‐4 substrate is separating both. During transmission, it can convert the linearly polarized EM wave to a circular one, with Axial Ratio (AR) ≤ 3 dB from 13.08 to 25.13 GHz with 63.07% Fractional Bandwidth (FBW). In addition, this polarizer can work in reflection mode also when the bottom FSS is replaced by a Perfect Electrical Conductor (PEC), demonstrating the linear‐circular polarization with AR (≤3 dB) from 16.94 to 18.64 GHz (RHCP/LHCP) and 24.5–40.32 GHz (LHCP/RHCP) with FBW 9.56% (Ku‐band), and 48.81% (K‐ and Ka‐band), respectively. Besides, linear‐circular conversion, it performs linear‐cross conversion in reflection mode with polarization conversion ratio (PCR) above 90% from 19.71–22.22 GHz, 43.57–48.81 GHz, 53.50–55.32 GHz with 13.89%, 11.34%, 3.32%, FBW, respectively. The equivalent circuit model of the proposed converter is extracted. Surface current distribution profiles at multiple plasmonic resonances are investigated to understand the reason behind the multi‐polarization conversion. The performance is angular stable up to 45° for both transverse electric (TE) and transverse magnetic (TM) incidences for reflection as well as transmission modes. The unitcell is compact with periodicity 0.114λL × 0.114λL and a thickness of 0.044λL, where λL is the free‐space wavelength of the lowest frequency. This design's novelty lies in dual‐mode stable angular performance in both reflection and transmission cases. Also, highly miniaturized architecture and circular rotation switching in the consecutive bands make this design suitable for real‐time scenarios.

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Novel broadband angular stable linear‐circular and linear‐cross polarizer based on inductive grid loaded H‐dipole in both reflection and transmission modes

Shukoor

Dey

2022

Int J RF Mic Comp-Aid Eng

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Highly miniaturized wideband angular stable linear–circular and linear–cross polarization converter for Ka-band satellite applications

Shukoor

Dey

2023

Int. J. Microw. Wireless Technol.

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This work proposes a novel, extremely miniaturized wideband linear–circular and linear–cross metasurface-enabled reflective polarizer. This design comprises a Meander-line structure with horizontal dipoles as the top frequency selective surface, printed on a 1 mm thin-grounded FR-4 substrate. The x/y-polarized incident electromagnetic wave is converted as circularly polarized from 10.60 to 10.92 GHz (LHCP/RHCP), 12.12 to 17.32 GHz (RHCP/LHCP), and 22.72 to 37.76 GHz (LHCP/RHCP) during reflection with 2.97, 35.33, and 49.74% Fractional Bandwidth (FBW). In addition, this design shows linear–cross conversion with a minimum 90% polarization conversion ratio from 11.41 to 12, 19.01 to 22.34, and 40.74 to 46.82 GHz with an FBW of 5.04, 16.11, and 13.89%. The device performance is considerably stable under different oblique incidences, and the polarizer's unitcell is compact with a structural periodicity of 0.089 × 0.064 $\lambda _L^2$ , and ultra-thin low-profile substrate thickness of 0.035λL. The proposed prototype is fabricated, and the measured results are in good agreement with the simulated one. This article also mentions how this polarizer could be tuned for dual-band K- and Ka-band satellite applications. The authors believe that the design's novelty lies in the multiband conversion with circular-polarization orthogonality, a highly miniaturized unitcell's volume of 0.199 $\lambda _L^3$ /1000, and better angular stability made this design a potential candidate for real-time satellite applications.

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Wideband Multifunctional Polarization Converter: Application to Low Radar Cross-Section Radiating System

Sofi,

Saurav,

Koul

et al. 2023

IETE Journal of Research

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Design and Fabrication of Engineered Reflector for Wideband Linear-to-Circular Polarization Converter

Cited by 6 publications

References 5 publications

Novel broadband angular stable linear‐circular and linear‐cross polarizer based on inductive grid loaded H‐dipole in both reflection and transmission modes

Novel broadband angular stable linear‐circular and linear‐cross polarizer based on inductive grid loaded H‐dipole in both reflection and transmission modes

Highly miniaturized wideband angular stable linear–circular and linear–cross polarization converter for Ka-band satellite applications

Wideband Multifunctional Polarization Converter: Application to Low Radar Cross-Section Radiating System

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