Realizing of cross-polarization conversion for linearly polarized waves in multiband by orthotropic metasurface

Wu, Liang-Pei; Fang, Quanhai; Pan, Wenfeng; Li, Minhua; Dong, Jianrong

doi:10.1080/09205071.2021.1958380

Cited by 5 publications

(10 citation statements)

References 31 publications

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“…It is observed that the PCR is better than 90% in the range of 9.83-29.37 GHz, and reaches nearly 100% at the three resonance frequencies. The relative bandwidth is up to 99.69%, being broader than the designs in the literature [31][32][33][34][35][36]. Additionally, Figure 3b shows the polarization azimuth angle α to describe the angle between the major polarization axis and x-axis, which can be calculated as [25]: Another parameter used to characterize polarization conversion is the PCR of the reflected wave, which is usually defined as [26]:…”

Section: Design and Simulationmentioning

confidence: 99%

“…Improvements have also been made to broaden both the bandwidth and the angular stability [31][32][33][34][35][36]. Karamirad et al [31] introduced an oval pattern periodic array based on multiple plasmon resonances and surface magnetic field distributions.…”

Section: Introductionmentioning

confidence: 99%

“…Another design [32] using cross-shaped resonators enhanced the angular stability to 40 • , but the bandwidth was not sufficiently wide. Wu et al [36] presented a broadband design that consisted of hollow oval sheet and rectangle patch, providing a bandwidth up to 90% for the first band. However, this design was very sensitive to the incident angle, and only operated efficiently with 25 • angular stability.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-Broadband Angular-Stable Reflective Linear to Cross Polarization Converter

et al. 2022

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An ultra-broadband angular-stable reflective linear to cross polarization converter based on metasurface is developed. The unit cell of the converter is formed by a slant end-loaded H-shaped resonator. The slant arrangement is to create polarization conversion. The end-loaded stubs are useful for miniaturization and the slots are responsible for enlarging bandwidth. The simulated results show that the polarization conversion ratio of the proposed design is better than 90% in the range of 9.83–29.37 GHz, corresponding to a relative bandwidth of 99.69%. It is also demonstrated that the mean polarization conversion ratio is larger than 80% even though the incident angle reaches 40° for both x-polarized and y-polarized incidences. To validate the design, a prototype of the proposed structure is fabricated and measured. Satisfactory agreement has been observed between measurement and simulation. Compared with the designs in the literature, the developed converter exhibits good performance of high efficiency, ultra-broadband and angular stability. Potential applications can be expected in polarization-controlled devices, stealth surfaces, antennas, etc.

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Section: Design and Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultra-Broadband Angular-Stable Reflective Linear to Cross Polarization Converter

et al. 2022

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“…Efficient control of polarization has always been the focus of researchers. In general, the unit structure of metamaterials/metasurfaces is properly designed, the required polarization control function can be achieved in different frequency bands [1][2][3][4][5][6][7]. Compared to ferrite materials, metamaterials/metasurfaces have the advantages of low mass and small volume.…”

Section: Introductionmentioning

confidence: 99%

Inverse design of transmission-type linear-to-circular polarization control metasurface based on deep learning

Hu,

Ma,

Zhang

et al. 2023

J. Phys. D: Appl. Phys.

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To solve the time-consuming and complex design problems, the deep learning method is used to realize the inverse predictive design of a transmission-type linear-to-circular polarization control metasurface (TLCPCM). Firstly, the target-generation neural net-work model (TGNNM) is constructed based on a fully connected neural network (FCNN). The model selects the critical features of the required electromagnetic perfor-mance as design targets, and maps low-dimensional design targets to high-dimensional electromagnetic performance. Secondly, taking the output data of the TGNNM as input data, an inverse-mapping neural network model (IMNNM) is constructed by a convolu-tional neural network (CNN). The prediction performance of the IMNNM is compared with two other inverse-mapping models. The research results show that the IMNNM out-performs the other two networks. Finally, combining TGNNM and IMNNM, four sets of TLCPCM structural parameters are predicted. The research results show that the elec-tromagnetic performances of the metasurface determined by the predicted structural parameters are generally consistent with the given design targets. On this basis, one ex-perimental sample is manufactured. The measurement results are consistent with the simulation results. The research results demonstrate the validity and feasibility of the inverse predictive design method proposed in this paper.

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“…Hence the synthesis of compact, passive polarization-converting metasurfaces have become the solution to the above challenge. Only a few works have reported on multi-band passive polarization converting MS with compact size, high polarization conversion ratio (PCR) values, and high performance [ 24 , 25 , 26 , 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

A Triple-Band Reflective Polarization Conversion Metasurface with High Polarization Conversion Ratio for Ism and X-Band Applications

Babu

Madhav

Das³

et al. 2022

Sensors

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A compact and triple-band polarization converting reflective type metasurface (PCRM) with a high polarization conversion ratio (PCR) is proposed for strategic wireless antenna-integrated applications. The unit cell of the metasurface is composed of S- and G-shaped patches separated with a parasitic gap and the grounded via is connected to the full ground plane. The unit cell is etched on an FR4 substrate (dielectric constant, εr = 4.4, loss tangent, tan δ = 0.02), with compact dimensions of 10 mm3 × 10 mm3 × 1.6 mm3. This structure provides a resonance at 5.2 (ISM), 6.9, and 8.05 GHz (X-band) frequencies. The designed unit cell structure is studied for Transverse Electric (TE)/Transverse Magnetic (TM) incident waves and their responses to the various incident angles. The corresponding PCR is calculated, which shows 92% in the lower frequency band (5.2 GHz), 93% in the second frequency band (6.9 GHz), and 94% in the high-frequency band (8.05 GHz). The total efficiency of the structure shows 83.2%, 62.95%, and 64.6% at the respective resonance bands. A prototype of the proposed PCRM with 3 × 3 unit cells is fabricated to validate the simulated results. The experimental data agrees with the simulation results. The compactness, triple-band operation with a high PCR value of more than 92% makes use of the designed metasurface in wireless antenna-integrated applications at ISM and X-bands.

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Realizing of cross-polarization conversion for linearly polarized waves in multiband by orthotropic metasurface

Cited by 5 publications

References 31 publications

Ultra-Broadband Angular-Stable Reflective Linear to Cross Polarization Converter

Ultra-Broadband Angular-Stable Reflective Linear to Cross Polarization Converter

Inverse design of transmission-type linear-to-circular polarization control metasurface based on deep learning

A Triple-Band Reflective Polarization Conversion Metasurface with High Polarization Conversion Ratio for Ism and X-Band Applications

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