Transmissive coding metasurface with dual-circularly polarized multi-beam

Li, Si Jia; Han, Bo Wen; Li, Zhuo Yue; Liu, Xiao Bin; Huang, Guo Shai; Li, Rui Qi; Cao, Xiangyu

doi:10.1364/oe.466036

Cited by 61 publications

(20 citation statements)

References 37 publications

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“…Interestingly, the co-pol component of the beam at 30 • is whereas it is RHCP at −30 • . This can be attributed to the Pancharatnam-Berry (PB) phase of the reflector as the condition of π/2 phase difference between v− and u− polarized phases imposed by ( 1) is a geometric phase to its 1-bit phase gradient [14].…”

Section: Resultsmentioning

confidence: 99%

A 1-Bit Coding Reconfigurable Metasurface Reflector for Circularly Polarized Wave Beam Steering from Linearly Polarized Incidence

Kundu¹,

Gupta²

2023

Preprint

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A 1-bit reconfigurable metasurface reflector is designed. It can provide beam-steering of circularly polarized (CP) re- flected waves when a linearly polarized (LP) plane wave is incident upon it. The unit cell of the metasurface provides 1-bit coding (‘bit-0’ and ‘bit-1’) for both v- and u-polarized reflected waves when two distinct reverse bias voltages (3 V and 20 V) are applied to the varactor diodes. Using such unit elements, a 20×20 array is constructed. During the array construction, a quadrature phase difference is main- tained between the v- and u- polarized components of each element. Using both theory and full-wave simulation re- sults, it is shown that the proposed metasurface reflectarray can steer two symmetrically deflected CP beams with two opposite handedness for a LP plane wave incidence.

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Section: Resultsmentioning

confidence: 99%

A 1-Bit Coding Reconfigurable Metasurface Reflector for Circularly Polarized Wave Beam Steering from Linearly Polarized Incidence

Kundu¹,

Gupta²

2023

Preprint

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“…It also has significant advantages of low profile, low cost, and ease of fabrication. [17][18][19][20][21] Therefore, metasurfaces can provide a new way to generate OAM beam. Recently, to easily realize OAM in microwave frequency, metasurfaces have been demonstrated by a series of experiments.…”

Section: Doi: 101002/adts202200842mentioning

confidence: 99%

Multiple Orbital Angular Momentum Beams with High‐Purity of Transmission‐Coding Metasurface

Liu

et al. 2023

Advcd Theory and Sims

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Vortex electromagnetic wave carrying orbital angular momentum (OAM) is expected to break through the shortage of spectrum resource because of its multiple independent modes. Nowadays, there are various methods to generate OAM vortex beam. Based on the concepts of digital metasurface and propagation phase, a broadband 3-bit coding transmission metasurface is designed and illustrated by simulation and measurement. The elements exhibit the different phase by changing the size of metal patch, and the focusing phase is introduced to reduce the divergence of OAM beams. Based on the principle of phase superposition, the wide-band, high-purity, and multi-beam OAM vortex waves can be generated by the transmission-coding metasurface (TCMS). The experimental results verify that TCMS realizes the multiple OAM beams along different directions simultaneously from 9 to 10.5 GHz, which are consistent with the theoretical results. The high purity more than 90% of OAM mode is demonstrated by both the simulated and measured results. The TCMS provides a potential and effective scheme for OAM multiplexing and multi-target positioning in wireless systems.

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“…Again, due to inherently band limited nature of these resonances, a working multi-band design that can operate over many microwave bands remains a huge design challenge. Recent studies have demonstrated the design and validation of coding metasurfaces for the conversion of linear to circular multi-beam radiation [21,22]. In this article we present a simple, single-layer metasurface design that achieves cross-conversion for horizontally or vertically polarized incident wave in the reflection mode.…”

Section: Introductionmentioning

confidence: 99%

A single-layer, wideband and angularly stable metasurface based polarization converter for linear-to-linear cross-polarization conversion

et al. 2023

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In this article, a single-layer metasurface based reflector design is proposed for linear-to-linear cross-polarization conversion in microwave frequency range. The unit-cell of the proposed design consists of triple-arrow resonant design printed on a grounded FR4 substrate. Excellent cross-conversion is achieved over a broad frequency range (8.0–18.50 GHz) with polarization conversion efficiency higher than 90%. The proposed design has a large fractional bandwidth (FBW) of 80% due to three resonances occurring in the band. The polarization response is angularly stable with respect to oblique incidences with incidence angles up to 45°. The proposed design has been fabricated and experimentally validated. The measurement results are in good agreement with the simulation results.

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Transmissive coding metasurface with dual-circularly polarized multi-beam

Cited by 61 publications

References 37 publications

A 1-Bit Coding Reconfigurable Metasurface Reflector for Circularly Polarized Wave Beam Steering from Linearly Polarized Incidence

A 1-Bit Coding Reconfigurable Metasurface Reflector for Circularly Polarized Wave Beam Steering from Linearly Polarized Incidence

Multiple Orbital Angular Momentum Beams with High‐Purity of Transmission‐Coding Metasurface

A single-layer, wideband and angularly stable metasurface based polarization converter for linear-to-linear cross-polarization conversion

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