Flexible broadband polarization converter based on metasurface at microwave band*

Wang, Qi; Kong, Xiangkun; Yan, Xiangxi; Xu, Yan; Liu, Shaobin; Mo, Jinjun; Liu, Xiaochun

doi:10.1088/1674-1056/28/7/074205

Cited by 42 publications

(23 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 90% PCR bandwidth is reduced when the incidence angle shifts from normal. The additional traveling path achieved by the EM wave between the metasurface and ground at higher angles generates a phase difference resulting in destructive interference, which would be cleared from Bragg's diffraction 26

italicΔϕ = ϕ_{oblique} - ϕ_{normal} = 2 \sqrt{ε_{r}} italickd ((), \frac{1}{\sqrt{1 - \frac{\sin^{2} θ}{{normalε}_{r}}}} - 1)

Here, θ represent the angle of incidence concerning normal, k is wavevector in the dielectric medium, and d represents the substrate thickness.…”

Section: Polarizer Unit‐cell Design and Resultsmentioning

confidence: 99%

A novel broadband l inear‐cross and l inear‐circular reflective polarizer based on interdigital capacitance loaded dipole for radar cross‐section applications

Shukoor

Dey

2022

Int J RF Mic Comp-Aid Eng

View full text Add to dashboard Cite

A novel interdigital capacitance (IDC) frequency selective surface (FSS) based linear-cross reflective polarizer for K-and Ka-band applications is demonstrated in this work. The suggested device includes an IDC-loaded dipole printed on a thin FR-4 grounded dielectric substrate. From 17.02 to 37.30 GHz, it shows linear-cross conversion with a minimum 90% polarization conversion ratio (PCR) of 20.28 GHz bandwidth (74.7% fractional bandwidth [FBW]) for a y/x polarized incident electromagnetic (EM) wave. Along with linear-cross conversion, this polarizer also performs linear-circular conversions with axial ratio ≤ 3 dB in two frequency bands (Ku band-right circular, 15.13-16.15 GHz; Ka-band-left circular, 38.52-39.78 GHz) with 6.52%, and 3.14% FBW, respectively. The design performance is stable up to 45 for both transverse electric (TE) and transverse magnetic (TM) modes. The polarizer unitcell has structural dimensions 0.177 Â 0.177 Â 0.061λ 3 L , where λ L corresponds to the freespace wavelength of the lowest working frequency. The polariser's transmission line equivalent circuit model is extracted, and a good match is observed with the EM solver response. The broadband behavior of FSS and the ground plane is better understood by looking at surface current patterns at resonant frequencies. The proposed design's radar cross-section (RCS) analysis is compared to perfect electric conductor for the bistatic condition. The design novelty lies in its compact architectural volume of the unitcell 1.911 λ 3 L =1000 À), low-profile, broadband PCR response with superior angle stability, dualpolarization conversion with circular rotation switching makes it a good option for real-time applications.

show abstract

italicΔϕ = ϕ_{oblique} - ϕ_{normal} = 2 \sqrt{ε_{r}} italickd ((), \frac{1}{\sqrt{1 - \frac{\sin^{2} θ}{{normalε}_{r}}}} - 1)

Here, θ represent the angle of incidence concerning normal, k is wavevector in the dielectric medium, and d represents the substrate thickness.…”

Section: Polarizer Unit‐cell Design and Resultsmentioning

confidence: 99%

A novel broadband l inear‐cross and l inear‐circular reflective polarizer based on interdigital capacitance loaded dipole for radar cross‐section applications

Shukoor

Dey

2022

Int J RF Mic Comp-Aid Eng

View full text Add to dashboard Cite

show abstract

“…The top metallic periodic structure is comprised of the long and short metallic arc wires, as well as the metallic disks. The structure has already been proved to achieve wideband polarization conversion 22 . Main resonances are excited by the long arc metallic wire and the metallic disk.…”

Section: -Bit Coding Unit Cells and Equivalent Circuit Modelmentioning

confidence: 99%

A metasurface composed of 3-bit coding linear polarization conversion elements and its application to RCS reduction of patch antenna

Kong

Wang

Jiang

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

In this paper, a metasurface composed of 3-bit coding linear polarization conversion elements and its application to RCS reduction of the patch antenna is intensively studied. At first, 3-bit coding metasurface are constructed by a sequence of eight coded unit cells, which have a similar cross-polarized reflected amplitude response and gradient reflected phase responses covering 0–2π, respectively. Equivalent circuit models of these unit cells are created to describe their electrical behavior for the two linear incident polarizations at the same time. Then, a patch antenna is integrated on the 3-bit metasurface, of which the elements are placed with a 2-dimensional linear coding sequence. The metal square ring is set around the patch antenna to protect it from the disturbance of metasurface. Both the simulation and experiment results demonstrate that the designed metasurface can primarily reduce the antenna RCS at a broadband, while the antenna performances are not degraded significantly.

show abstract

“…Tunable polarization converters based on active devices like varactor diodes have been reported 14 to convert linear to linear and linear to elliptical over a wide band. Although the 90% PCR bandwidth is large for normal incidence in all the above designs, it reduces drastically at higher oblique angles due to destructive interference caused by additional path traveled by the wave within the substrate at higher frequency region 15 . Broader bandwidth with greater angular stability (with minimal 90% BW reduction) and extensive adaptability are required for any polarization converter.…”

Section: Introductionmentioning

confidence: 99%

Broadband linear‐cross and circular‐circular polarizers with minimal bandwidth reduction at higher oblique angles for RCS applications

Shukoor

Dey

Koul

et al. 2021

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

In this work, broadband linear to cross and circular to circular polarization converter for K and Ka-band applications is proposed. The metasurface comprises a novel H-shaped unit cell printed on 1.2 mm thin FR-4 grounded dielectric substrate. It exhibits 90% polarization conversion ratio (PCR) over a bandwidth of 22.26 GHz (17.97-40.23 GHz) with 76.5% FBW maintaining a minimal PCR of 92.5%. The converter also maintains handedness for circularly polarized incident wave. Surface current distributions at different resonant frequencies are analyzed to illustrate the reason behind the broadband behavior.The converter design is simple with the cell periodicity of 0.209λ o and thickness of 0.071λ o , where λ o is the free-space wavelength corresponding to the lowest frequency of the band. Monostatic and Bistatic RCS analysis of the designed converter is performed, demonstrating greater than 10 dBsm RCS reduction over all the frequency range. It shows 16 to 30 dBsm at resonant

show abstract

Flexible broadband polarization converter based on metasurface at microwave band*

Cited by 42 publications

References 46 publications

A novel broadband l inear‐cross and l inear‐circular reflective polarizer based on interdigital capacitance loaded dipole for radar cross‐section applications

A novel broadband l inear‐cross and l inear‐circular reflective polarizer based on interdigital capacitance loaded dipole for radar cross‐section applications

A metasurface composed of 3-bit coding linear polarization conversion elements and its application to RCS reduction of patch antenna

Broadband linear‐cross and circular‐circular polarizers with minimal bandwidth reduction at higher oblique angles for RCS applications

Contact Info

Product

Resources

About