Near-Field Angular Scan Enhancement of Antenna Arrays Using Metasurfaces

Egorov, Gleb A.; Eleftheriades, George V.

doi:10.1109/tap.2022.3164137

Cited by 5 publications

(12 citation statements)

References 15 publications

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“…As shown, at broadside the incident beam from the phased array becomes a diverging beam with a directivity degradation of 3.8 dB. Note that theoretically the directivity reduction when passing through the two-lens system is given by ( 6) [8].…”

Section: Full-wave Simulation Results Of the Two-lens Hms Systemmentioning

confidence: 93%

“…Two-HMS lens scan-angle enhancement is achieved with a converging lens and a diverging lens which are placed in the near-field region of a source array as depicted in Fig. 1 [8]. Ray tracing through the two-lens system can be expressed by ray transfer matrix analysis [16].…”

Section: Two-lens System For Scan Enhancementmentioning

confidence: 99%

“…To reduce the thickness of the antenna architecture, metasurface technology has been applied to scan-angle enhancement of phased arrays [6]- [8]. In [6], a curve shaped metasurface…”

Section: Introductionmentioning

confidence: 99%

“…More recently, Huygens' metasurface (HMS) theory has been utilized for realizing scan-angle enhancement systems [7], [8]. The HMSs are subwavelength thin sheets comprising scatterers or unit cells which contain co-located orthogonal electric and magnetic dipole moments [9].…”

Section: Introductionmentioning

confidence: 99%

“…More recently, HMSs have demonstrated the ability of independenet phase and amplitude control for precise antenna beamforming through the excitation of auxialiary surface waves [13], [14]. In terms of extending the scan range of phased arrays, HMS planar lenses with ray optical theory were discussed in [7], [8]. Compared with the meta-domes and radomes in [2], [3], [6], the structures with HMS lenses are planar.…”

Section: Introductionmentioning

confidence: 99%

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Physical Design and Experimental Verification of a Huygens' Metasurface Two-lens System for Phased-array Scan-angle Enhancement

Kim¹,

Egorov²,

Eleftheriades³

2022

Preprint

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Over the past decades, many radome designs to extend the angular scan range of phased-array antennas have been devised by utilizing dielectric materials and metamaterials. More recently, metasurface technology such as planar lenses and beam deflectors have been applied to phased arrays, enabling scan-angle enhancers to have a low profile. In this work, a physical Huygens' metasurface (HMS) two-lens system for scanangle doubling of a phased array is presented. For the HMS unit cells, the wire-loop topology is deployed to achieve high transmission for the required phase-angle shift. The proposed two-lens system is analyzed by full-wave simulations and experiments. The simulation results demonstrate that the scan angle doubles when the incident angle is below 15°in accordance to the design specification. Furthermore, the directivity degradation of the refracted beams by the two-HMS lenses is in good agreement with theory. Finally, a fabricated two-lens system with two 15λ long by 15λ wide metasurface lenses and a 16 × 16-element patch antenna array as a source is experimentally verified at 10 GHz. The experimental results are in good agreement with the simulated results by showing angle-doubling performance with ±2°scan errors.

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Section: Full-wave Simulation Results Of the Two-lens Hms Systemmentioning

confidence: 93%

Section: Two-lens System For Scan Enhancementmentioning

confidence: 99%

“…To reduce the thickness of the antenna architecture, metasurface technology has been applied to scan-angle enhancement of phased arrays [6]- [8]. In [6], a curve shaped metasurface…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Physical Design and Experimental Verification of a Huygens' Metasurface Two-lens System for Phased-array Scan-angle Enhancement

Kim¹,

Egorov²,

Eleftheriades³

2022

Preprint

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show abstract

Reconfigurable intelligent surfaces as the key-enabling technology for smart electromagnetic environments

Bilotti,

Barbuto,

Hamzavi-Zarghani

et al. 2024

Advances in Physics: X

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Physical Design and Experimental Verification of a Huygens’ Metasurface Two-Lens System for Phased-Array Scan-Angle Enhancement

2022

Self Cite

View full text Add to dashboard Cite

Over the past decades, many radome designs to extend the angular scan range of phased-array antennas have been devised by utilizing dielectric materials and metamaterials. More recently, metasurface technology such as planar lenses and beam deflectors have been applied to phased arrays, enabling scanangle enhancers to have a low profile. In this work, a physical Huygens' metasurface (HMS) two-lens system for scan-angle doubling of a phased array is presented. For the HMS unit cells, the wire-loop topology is deployed to achieve high transmission for the required phase-angle shift. The proposed two-lens system is analyzed by full-wave simulations and experiments. The simulation results demonstrate that the scan angle doubles when the incident angle is below 15 • in accordance to the design specification. Furthermore, the directivity degradation of the refracted beams by the two-HMS lenses is in good agreement with theory. Finally, a fabricated two-lens system with two 15λ long by 15λ wide metasurface lenses and a 16 × 16element patch antenna array as a source is experimentally verified at 10 GHz. The experimental results are in good agreement with the simulated results by showing angle-doubling performance with ±2 • scan errors.INDEX TERMS Phased arrays, beam steering, Huygens' metasurface, metasurface lens.

show abstract

Near-Field Angular Scan Enhancement of Antenna Arrays Using Metasurfaces

Cited by 5 publications

References 15 publications

Physical Design and Experimental Verification of a Huygens' Metasurface Two-lens System for Phased-array Scan-angle Enhancement

Physical Design and Experimental Verification of a Huygens' Metasurface Two-lens System for Phased-array Scan-angle Enhancement

Reconfigurable intelligent surfaces as the key-enabling technology for smart electromagnetic environments

Physical Design and Experimental Verification of a Huygens’ Metasurface Two-Lens System for Phased-Array Scan-Angle Enhancement

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