Reflector Synthesis for Wide-Scanning Focal Plane Arrays

Dubok, A.; Al-Rawi, A.; Gerini, G.; Smolders, A.B.

doi:10.1109/tap.2018.2889136

Cited by 14 publications

(27 citation statements)

References 21 publications

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“…However, with fewer elements active, the transmit power is also reduced. It is possible to intentionally increase the number of active antenna elements of an FPA by shaping the reflector or subreflector [12] [13], or by axially displacing the array [14], increasing the EIRP. Regardless of this design choice, to achieve wide angle scanning it is still needed to populate the full focal plane also resulting in an expensive system.…”

Section: Antenna Arraymentioning

confidence: 99%

Wide-Scan Focal Plane Arrays for mmWave Point-to-Multipoint Communications

Bude

Elsakka

Geurts

et al. 2022

IEEE Open J. Antennas Propag.

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A new antenna system concept is presented where a wide-scan focal plane array antenna is used to achieve point-to-multipoint communication. The focal plane of a parabolic toroid reflector is populated with several antenna arrays, the positions of which determine the directions of the beams. This concept is investigated for beams pointed towards 0 • (broadside) and 28 • in azimuth. Each array allows for scanning an additional ±1 • in azimuth and elevation. This allows for compensation of twist and sway of the antenna mast. Several array configurations are compared in terms of directivity and scan loss for such a system at E-band. It is found that an 8-by-8 array with an inter-element spacing of 0.7λ0 results in an optimal directivity with a scan loss lower than 1dB when scanning ±1 • in azimuth and elevation. For the 0 • beam direction the directivity is 45.5dBi and for the 28 • beam direction the directivity is 44.4dBi, showing the wide angle scanning properties of this system. An experimental system is built at K-band and measurements are performed showing this system in action. In the measurements an array of 8-by-8 is used with an inter-element spacing of 0.5λ0. The scan loss when scanning ±2 • in azimuth and elevation is below 1dB. The directivity is 37.0dBi and 35.4dBi for the 0 • and 28 • beam directions, respectively. The spillover losses and aperture efficiencies are also found, as well as a relative metric for the transmitted power and the effective isotropic radiated power for both the E-band and K-band systems.

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Section: Antenna Arraymentioning

confidence: 99%

Wide-Scan Focal Plane Arrays for mmWave Point-to-Multipoint Communications

Bude

Elsakka

Geurts

et al. 2022

IEEE Open J. Antennas Propag.

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“…At the same time, the focusing properties of traditional reflectors significantly deteriorate during scanning. As a result, only a small number of active array elements are typically used in the focal plane [6], [8], [9], [10]. This limits the number of simultaneously available beams or scan range [11], [12] and limits the achievable effective isotropic radiated power (EIRP) [13], [14], [15].…”

Section: Introductionmentioning

confidence: 99%

Focal-Plane Arrays With Improved Scan Capabilities

Dubok

Smolders

2023

IEEE Trans. Antennas Propagat.

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“…Compared with the bulky reflector and the precise phased arrays, metasurface lens is considered as a promising solution for beam scanning achievement due to the ultrathin profile, light weight, low cost and easy fabrication. [17][18][19][20][21] Due to the dispersion nature, most of the reported beam-scanning metalenses are limited to a single-band operation, [13,14,16] whereas dual-band or multiband operation is of great interest for improving communication capability, achieving compact integration and reducing device costs. In order to tackle this issue, the multiplexing techniques, i.e., aperture division and meta-atom interleaving are widely used for multiband achievement.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrathin Dual‐Band Wide‐Angle Beam Scanning Metalens Based on High‐Efficiency Meta‐Atom

Wang

Chen

Gao

et al. 2022

Advanced Photonics Research

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Metasurfaces composed of planar subwavelength‐scaled meta‐atoms demonstrate unprecedented wavefront manipulation capabilities. However, the wavelength‐dependent property of the metasurface could severely reduce the design freedom, and most metasurfaces require multilayer structure for high efficiency. Herein, a single‐layered‐substrate meta‐atom is proposed to achieve independent phase manipulations as well as high transmission efficiencies at two frequencies. Specifically, the full 2π phase coverages can be individually realized through rotating the corresponding resonators. As a proof‐of‐concept demonstration, a dual‐band high‐efficiency metalens with wide field‐of‐view (FoV) under the circular polarization incidence is simulated, fabricated and measured at Ka‐band for satellite communications. Both simulation and experimental results agree well with each other, demonstrating that wide scanning coverages of ±60° can be achieved at both 20 and 30 GHz. The proposed method can be a competitive candidate for designing dual‐band high‐efficiency meta‐devices.

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Reflector Synthesis for Wide-Scanning Focal Plane Arrays

Cited by 14 publications

References 21 publications

Wide-Scan Focal Plane Arrays for mmWave Point-to-Multipoint Communications

Wide-Scan Focal Plane Arrays for mmWave Point-to-Multipoint Communications

Focal-Plane Arrays With Improved Scan Capabilities

Ultrathin Dual‐Band Wide‐Angle Beam Scanning Metalens Based on High‐Efficiency Meta‐Atom

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