A Flat-Lensed Spiral Phase Plate Based on Phase-Shifting Surface for Generation of Millimeter-Wave OAM Beam

Chen, Yi‐Ling; Zheng, Shilie; Li, Yue; Hui, Xiaonan; Jin, Xiaofeng; Chi, Hao; Zhang, Xianmin

doi:10.1109/lawp.2015.2497243

Cited by 132 publications

(46 citation statements)

References 12 publications

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“…The main lobe direction and gain are about 12.5° and 16 dB, respectively, and the half‐power beamwidth is 8°. Different from the far‐field directivity patterns of the +1 mode SPPs, the zero‐intensity area of the +2 mode metasurface plate is not occurred at the center (theta = 0°), but with 2° shifting from the center, which is corresponding well with the simulated far‐field directivity pattern of a +2 mode OAM beam in Reference .…”

Section: Experiments and Resultssupporting

confidence: 81%

“…However, these antennas need complicated feed networks which are difficult to design. Besides, the spiral phase plate (SPP) is a practical method to generate OAM beams . By changing the equivalent permittivity and the thickness of the unit cells of the plate simultaneously, an ultralow reflectivity SPP is obtained in Reference , but the SPP is not flat.…”

Section: Introductionmentioning

confidence: 99%

“…By changing the equivalent permittivity and the thickness of the unit cells of the plate simultaneously, an ultralow reflectivity SPP is obtained in Reference , but the SPP is not flat. To realize different phase shifts in a flat plate, many approaches for phase shift are analyzed and proposed . The drilled flat plate SPP introduces the phase shift by changing the angular variation of equivalent permittivity of the substrate through drilling holes in matter, but it does not take the insertion loss of the SPP into consideration.…”

Section: Introductionmentioning

confidence: 99%

“…The drilled flat plate SPP introduces the phase shift by changing the angular variation of equivalent permittivity of the substrate through drilling holes in matter, but it does not take the insertion loss of the SPP into consideration. By changing the size of the unit cell, different phase shifts can also be obtained in multilayer printed surface plates . In addition, different phase shifts can be obtained by varying the permittivity and thickness of the all‐dielectric plates …”

Section: Introductionmentioning

confidence: 99%

“…To realize different phase shifts in a flat plate, many approaches for phase shift are analyzed and proposed. 9,10,[12][13][14][15][16][17] The drilled flat plate SPP 9 introduces the phase shift by changing the angular variation of equivalent permittivity of the substrate through drilling holes in matter, but it does not take the insertion loss of the SPP into consideration. By changing the size of the unit cell, different phase shifts can also be obtained in multilayer printed surface plates.…”

mentioning

confidence: 99%

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Honeycombed metasurface plate for generation of X‐band orbital angular momentum beam

Guo

Yang

2019

Micro & Optical Tech Letters

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A honeycombed transmission metasurface based on hexagonal unit is proposed in this article for generation of orbital angular momentum (OAM) beam. The hexagonal metasurface unit is composed of five metal layers and is separated by four dielectric substrates. A metal layer with three etched crossed slots is placed in the middle of the substrates, and other four hexagonal metal layers with same dimensions are placed symmetrically on both sides. By simulating the unit comprehensively around the center frequency of 10 GHz, a list of units with good transmission coefficient and different phase shifts for metasurface design is obtained. Based on the hexagonal metasurface units, the configuration of the metasurface plate is presented and two models of +1 and +2 mode are designed accordingly. The simulated results show that the metasurface plate is insensitive to the incident wave polarization and is able to generate OAM beams from circularly polarized (CP) and linearly polarized (LP) incident plane waves. To validate the correctness of the simulation results, a +2 mode OAM metasurface plate is fabricated and measured, and a helical phase wavefront is obtained, which demonstrates the generation of OAM beam.

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