Circular Polarization Wide-Angle Beam Steering at Ka-Band by In-Plane Translation of a Plate Lens Antenna

Lima, Eduardo B.; Matos, Sérgio A.; Costa, Jorge R.; Fernandes, Carlos A.; Fonseca, Nelson J. G.

doi:10.1109/tap.2015.2484419

Cited by 166 publications

(161 citation statements)

References 20 publications

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“…The normalized radiation patterns obtained in [4] are compared with the ones obtained by this method. A good agreement is verified (Fig 3), thus validating this method of analysis.…”

Section: B Lens Phase Correction Modelmentioning

confidence: 99%

“…As the feed moves along x (a¹0) aberrations gradually increase. As shown in [4] (where it is conside32 1\red that 0 0 x = ), the linear phase error, due to the feed displacement, changes beam direction according to…”

Section: A Unifocal Phase Correctionmentioning

confidence: 99%

“…The combination of lens displacement with an offset Fresnel design was used to improve significantly the antenna scanning elevation coverage comparing with the usual broadside Fresnel correction. We have shown in [4] that the level of aberrations caused by the lens displacement increases with the lens size. Therefore, simple scaling of the presented 30 dBi lens solution to achieve 40 dBi directivity would originate a scan loss around 6 dB and SLL around -8 dB for the same scanning interval.…”

Section: Introductionmentioning

confidence: 97%

“…Mechanical steering antennas [1] tend to be a more affordable option than the electronic steering counterpart [2], at the cost of having bulkier solutions. There is an intensive research on compact mechanical steering solutions [3], [4]. Especial attention is being given to planar lenses as an alternative to the usual reflector-based solutions [5].…”

Section: Introductionmentioning

confidence: 99%

“…Especial attention is being given to planar lenses as an alternative to the usual reflector-based solutions [5]. Recently, the authors proposed a simple mechanical beam steering antenna concept [4]. The wide-angle elevation beam steering (off-set scanning interval [16º to 54º]) is achieved by in-plane translation of a thin off-set flat lens in front of a stationary primary feed while full azimuth coverage is obtained by simple 360º rotation of the lens (see Fig.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Design of a 40 dBi planar bifocal lens for mechanical beam steering at Ka-band

Matos

Lima²,

Costa

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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A new design of planar lenses for mechanical beam steering at Ka-band is presented, which enables achieving simultaneously wide scanning coverage (40 degrees) with high directivity (40 dBi) and low beam distortion (side lobe level below -15 dB and scan loss better than -2.4 dB). The steering mechanism based on in-plane lens translation/rotation has been demonstrated in a previous 30 dBi antenna prototype at 30 GHz. We showed that aberrations, caused by the in-plane lens translation, become more significant with the increase of the lens size. Hence, the presented 30 dBi lens solution cannot be simply scaled to achieve the aimed 40 dBi directivity (a common specification for satellite communications at Ka-Band). Using a PO/GO approach, implemented in CST Microwave Studio ®, we prove that the proposed bifocal design outperforms conventional unifocal phase correction.

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“…The normalized radiation patterns obtained in [4] are compared with the ones obtained by this method. A good agreement is verified (Fig 3), thus validating this method of analysis.…”

Section: B Lens Phase Correction Modelmentioning

confidence: 99%

Section: A Unifocal Phase Correctionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Design of a 40 dBi planar bifocal lens for mechanical beam steering at Ka-band

Matos

Lima²,

Costa

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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Advances in Transmitarray Antennas

Feng

Xiao

2020

Wiley Encyclopedia of Electrical and Electronics Engineering

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Recent advances in the art of transmitarray antenna (TAA) designs are summarized in this article, mainly focusing on the TAA element designs, improved feeding mechanisms, methods of designing wideband and ultra‐wideband TAAs, and TAAs for beam‐steering applications. Firstly, according to the diverse‐phase shifting mechanisms, representative TAA elements in the available literatures are categorized into four groups, including the receiving–transmitting elements, multilayer frequency‐selective surface‐type elements, polarization‐conversion elements, and phase‐rotation elements. Based on their own specific properties, designers can flexibly select the proper elements for different application scenarios. Moreover, primarily aiming at reducing the overall profile, some improved feeding mechanisms are discussed, for example, the folded TAA, TAA with the feeds of the multihorn configuration, the auxiliary small TAA, the integrated leaky‐wave antenna, the Cassegrain reflectarray, or a small‐scale array antenna. Subsequently, numerous typical solutions to improve the inherently narrow bandwidths of the TAAs are also presented. It can be concluded that the wideband performances of the non‐true‐time‐delay TAA are realized by optimizing the element‐phase errors and transmission losses at all designing frequencies. If the true‐time‐delay elements are employed, the key point is utilizing their group delays to appropriately compensate the spatial phase delays. Finally, for highly demanded beam‐steering applications, the TAAs incorporated with the techniques of reconfigurable, mechanical scan, switched beam, or phased array antenna (PAA) feed are introduced. Specifically, representative designs of the PAA‐fed TAAs are presented in detail, which will be a promising technical candidate of high‐gain beam scanning antennas.

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Frequency‐Independent Beam Scanning Leaky‐Wave Antennas

Guo

Ziolkowski

2021

Advanced Antenna Array Engineering for 6G and Beyond Wireless Communications

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Circular Polarization Wide-Angle Beam Steering at Ka-Band by In-Plane Translation of a Plate Lens Antenna

Cited by 166 publications

References 20 publications

Design of a 40 dBi planar bifocal lens for mechanical beam steering at Ka-band

Design of a 40 dBi planar bifocal lens for mechanical beam steering at Ka-band

Advances in Transmitarray Antennas

Frequency‐Independent Beam Scanning Leaky‐Wave Antennas

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