An ultra‐wideband linear‐to‐circular polarization converter in reflection mode at terahertz frequencies

Li, Sijie; Zhang, Xiangjun

doi:10.1002/mop.31947

Cited by 11 publications

(4 citation statements)

References 25 publications

(26 reference statements)

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“…According to the definition of CP waves, the reflected waves in these five frequency bands can be considered CP waves. We define the AR to evaluate the CP waves, engineering generally considers the AR lower than 3 dB to be a CP wave and AR can be calculated through the following equation [30]: where β represents the ellipticity angle, as in the equation:…”

Section: Design and Simulationmentioning

confidence: 99%

A multiband and multifunctional metasurface polarization converter using split-ring resonators

Liu,

Lu,

Chen

et al. 2023

J. Opt.

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In this paper, a multiband and multifunctional metasurface polarization converter is proposed based on split-ring resonators (SRR), which can effectively convert linearly polarized (LP) wave to cross-polarized and circularly polarized (CP) wave in the part of C to K bands. The simulation results show that when the structure has a metal bottom plate, the cross-polarization conversion (CPC) can be achieved in three frequency bands, 7.43-10.49, 10.84-14.66, 16.32-18.19GHz, the polarization conversion ratio (PCR) >90%, and the conversion from LP-to-CP (LTC) can be achieved in five frequency bands of 7.27-7.4, 14.72-14.9, 15.24-16.05, 18.24-18.79 and 18.97-19.47GHz, the axial ratio (AR) is less than 3dB, and the polarization converter can maintain good performances in 45° incidence angle. When there is no bottom metal plate, the LTC function can be achieved in two frequency bands, 8.32-9.72 and 11.24-17.18GHz, the AR is less than 3dB, and with the increase of the incident angle, the first frequency band of the LTC conversion is almost unchanged, but the second frequency band is split into two bands and then stabilized. The mechanism of polarization conversion generation was analyzed, and the polarization converter can be widely used in microwave communication and radar stealth fields.

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Section: Design and Simulationmentioning

confidence: 99%

A multiband and multifunctional metasurface polarization converter using split-ring resonators

Liu,

Lu,

Chen

et al. 2023

J. Opt.

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show abstract

“…Polarization converters can generally be categorized into linear polarization converters [9][10][11][12], linear-circular polarization converters [13][14][15][16], and circularly polarized converters [17][18][19][20], depending on their applications. At the same time, the polarization rotator is also a type of polarization converter.…”

Section: Introductionmentioning

confidence: 99%

Design of a transmissive dual-frequency polarization rotator for linearly polarized electromagnetic wave

Chen,

Ding,

Luo

et al. 2024

EPJ Appl. Metamat.

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This paper presents the design of a transmission-type dual-frequency polarization rotator for linearly polarized electromagnetic wave. The rotator facilitates polarization conversion for incident waves at any azimuth angle ϕ at two specific frequency points, resulting in a transmission wave with a counterclockwise rotation of 2ϕ. The proposed polarization rotator structure comprises three metal layers separated by two dielectric substrates. It includes two large rectangular metal patches positioned orthogonally along the x- and y-axes, respectively, as well as two small rectangular metal patches also positioned orthogonally along the x- and y-axes, respectively. The upper and lower metal layers act as the receiving and radiation ends, respectively. The transmitting and receiving ends are interconnected through coaxial metal holes. Remarkably, polarization conversion efficiencies exceeding 0.95 and 0.94 at 12 and 17 GHz, respectively, are achieved, and these high conversion efficiencies remain consistent as the azimuth angle of incidence changes. Furthermore, experimental results obtained from fabricated samples align well with the simulation ones, thus validating the effectiveness of the proposed polarization rotator. The proposed transmissive dual-frequency polarization rotator exhibits good practical application prospects in mobile satellite communications, GNSS, WLAN, etc.

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“…The locus traced by the tip of the electric field vector with time in a plane perpendicular to the direction of propagation is referred to as wave polarization. Controlling and manipulating polarization states has significance in many applications like polarization beam splitters, 1 quarter‐wave and half‐wave plates, 2 antenna design, 3 and for RCS reduction in stealth technology 4 . The polarization conversion mechanism is broadly categorized into two types.…”

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

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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

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An ultra‐wideband linear‐to‐circular polarization converter in reflection mode at terahertz frequencies

Cited by 11 publications

References 25 publications

A multiband and multifunctional metasurface polarization converter using split-ring resonators

A multiband and multifunctional metasurface polarization converter using split-ring resonators

Design of a transmissive dual-frequency polarization rotator for linearly polarized electromagnetic wave

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

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