Holographic-Inspired Multiple Circularly Polarized Vortex-Beam Generation with Flexible Topological Charges and Beam Directions

Karimipour, Majid; Komjani, Nader; Aryanian, Iman

doi:10.1103/physrevapplied.11.054027

Cited by 21 publications

(10 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 41,42 ] Furthermore, the holographic metasurfaces are also explored to reduce radar cross‐sections, [ 43,44 ] and to generate nondiffractive beams. [ 45,46 ] Additionally, to excite the holographic metasurfaces, several methods are investigated, such as vertically positioned monopole, [ 24–26 ] coaxially fed vertical probe, [ 47 ] and planar Vivaldi and Yagi antenna. [ 48 ]…”

Section: Figurementioning

confidence: 99%

Tensor Holographic Metasurface Using Addition Theory to Independently Manipulate Orthogonally Polarized Bessel Beams

Shen

Xue

Yang

et al. 2021

Adv Materials Technologies

View full text Add to dashboard Cite

A tensor holographic metasurface is proposed, to independently manipulate nondiffractive beams with orthogonal polarization and flexible propagation direction. To theoretically analyze the proposed topology, addition theory is developed to modulate surface impedance using tensor cells. Moreover, a polynomial formula is derived to express the equivalent surface impedance of tensor unit cells for pattern generation. To validate this concept, a tensor holographic metasurface is designed, fabricated, and measured. The well‐matched simulation and measurement results show that, for the first time, the proposed holographic metasurface with tensor unit‐cells, simultaneously generates two Bessel beams, not only with orthogonal polarization, but also with expected propagation direction rather than fixed along the broadside. Moreover, the proposed topology is promising to manipulate multiple beams not limited to two Bessel beams.

show abstract

Section: Figurementioning

confidence: 99%

Tensor Holographic Metasurface Using Addition Theory to Independently Manipulate Orthogonally Polarized Bessel Beams

Shen

Xue

Yang

et al. 2021

Adv Materials Technologies

View full text Add to dashboard Cite

show abstract

“…• Grid spacing: As a rule of thumb, while the grid spacing is smaller, the bandwidth becomes more at the expense of slightly decreasing the antenna efficiency. The main prohibitive reason for shrinking the grid spacing is the manufacturing considerations because the gap between many of the elements becomes very small in new designs [23]. In general, the grid spacing in artificial impedance surfaces can be selected much smaller than half wavelength, which is a well-used dimension in phase shifting surfaces.…”

Section: Dual-band Hologram Realisationmentioning

confidence: 99%

“…In this paper, we propose an assessed approach based on the holographic theory to design a dual-band broadband multi-beam reflectarray. The holographic-inspired approach is a novel attitude towards the reflectarray functionality which has been lately reported in our works [21][22][23] to develop several versatile pencil beam radiation patterns. Considering the holographic technique, the reflecting surface (which is called the hologram) of reflectarray acts as a continuous impedance surface similar to the one reported in [24].…”

Section: Introductionmentioning

confidence: 99%

Broadband, dual‐band reflectarray with dual orthogonal polarisation for single and multi‐beam patterns

Karimipour

Komjani

Aryanian

2019

IET Microwaves, Antennas & Propagation

Self Cite

View full text Add to dashboard Cite

Two single‐layered broadband dual‐band dual orthogonal polarisation reflectarrays are designed and developed in the X‐ and Ku‐bands. The well‐known holographic technique is employed such that one antenna generates a single radiation beam in two bands and another generates a five‐beam pattern in two bands simultaneously. For both antennas, a subwavelength Jerusalem‐Shaped unit cell is employed to independently realise two impedance distributions for each band and, consequently, not only broaden the operational bandwidths for both bands, but also limit the mutual coupling between two sets of impedances. As a typical case, an X/Ku band 20 cm × 20 cm five‐beam dual‐band reflectarray with dual linear polarisation is designed and fabricated for the experimental verification. The measurement results show that the fabricated antenna has 21% 1‐dB gain bandwidth (from 8.5 to 10.5 GHz) with vertical polarisation and has 8.8% 1‐dB gain bandwidth (from 14.65 to 16 GHz) with horizontal polarisation. Furthermore, the maximum measured aperture efficiencies in the X‐ and Ku‐bands are 57 and 69%, respectively.

show abstract

“…Meta-surfaces have been proved to be an efficient way to generate OAM vortex beams through properly arranging sub-wavelength meta-atom arrays [8][9][10][11][12][13][14][15][16], where multiple OAM vortex beams with controllable beam directions and topological charges have been synthesized [17][18][19][20][21][22]. On the other hand, meta-surfaces have also demonstrated the great capacity of polarization conversions [23][24][25][26][27][28], where linearly polarized (LP) waves are shown to be transformed into their cross counterparts through re-assigning the amplitudes of co-and cross-polarized components.…”

Section: Introductionmentioning

confidence: 99%

Generating Different Polarized Multiple Vortex Beams at Different Frequencies from Laminated Meta-Surface Lenses

Gao

Yang

2021

Micromachines

View full text Add to dashboard Cite

We demonstrate the generation of multiple orbital angular momentum (OAM) vortex beams with different radiating states at different frequencies through a laminated meta-surface lens consisting of a dual polarized meta-array interconnected with a frequency selective meta-array. The co-linearly polarized (LP) waves from the source can directly penetrate the meta-surface lens to form multiple OAM vortex beams at one frequency. On the other hand, the meta-surface lens will be capable of releasing the cross-LP counterparts at another frequency with high-efficient polarization conversions to have multiple OAM vortex radiations with different radiating directions and vortex modes. Our design, using laminated meta-surface lens to synthesize multiple OAM vortex beams with orthogonal polarizations at different frequencies, should pave the way for building up more advanced vortex beam communication system with expanded diversity of the meta-device.

show abstract

Holographic-Inspired Multiple Circularly Polarized Vortex-Beam Generation with Flexible Topological Charges and Beam Directions

Cited by 21 publications

References 30 publications

Tensor Holographic Metasurface Using Addition Theory to Independently Manipulate Orthogonally Polarized Bessel Beams

Tensor Holographic Metasurface Using Addition Theory to Independently Manipulate Orthogonally Polarized Bessel Beams

Broadband, dual‐band reflectarray with dual orthogonal polarisation for single and multi‐beam patterns

Generating Different Polarized Multiple Vortex Beams at Different Frequencies from Laminated Meta-Surface Lenses

Contact Info

Product

Resources

About