Wide Angular Coverage Deflector: 60-GHz three-dimensional passive electromagnetic deflector achieves wide angular coverage

Kazim, Muhammad; Herben, M.H.A.J.; Smolders, A.B.

doi:10.1109/map.2016.2520310

Cited by 6 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore a scan enhancing setup with α of 2 would lead to halving the original beam directivity, which is in agreement with past work [5], [6], [7].…”

Section: B Effect Of Scan Enhancement On Directivitysupporting

confidence: 91%

“…First of all, this shows that the refracted beam no longer exhibits peak directivity in the desired broadside direction. Because (5) and (6) are valid for large L and small |f |, it is easy to notice that D (0)/D U,max can be much smaller than 1/2, implying possible broadside directivity degradation far greater than the 3dB degradation one would have obtained by placing the lens in the far-field of the source.…”

Section: Scan Enhancement Of Finitely Sized Arraysmentioning

confidence: 99%

“…A physical dielectric dome was fabricated and tested in [2]. Further theoretical and implementation advancements include design of refracting domes with transformation optics techniques [3], [4], and reformulating the beam refraction problem as transferring gain pattern envelopes using power conservation [5], [6]. All these phase incurring strucutres which achieved phased array scan enhancement did so at a cost of a degraded directivity, especially in the broadside direction.…”

Section: Introductionmentioning

confidence: 99%

“…All the structures shown to achieve array scan enhancement in the listed publications resemble diverging lenses near broadside. References [1], [2], [5], [6], [8] show that for a scan enhanced beam the worst directivity performance is observed around broadside. Thus, Sec.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Theory and Simulation of Metasurface Lenses for Extending the Angular Scan Range of Phased Arrays

Egorov

Eleftheriades

2020

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

Recent metasurface developments have led to their consideration for extending the angular scan range of phased arrays. This paper considers the use of Huygens' metasurfaces as lenses to accomplish the task. Ray optics is used to uncover how a single lens can extend the scan range. It is shown that a single scan extending lens leads to a broadside directivity degradation of the original beam. This directivity degradation is quantitatively characterized as a function of the desired angular scan-range expansion. A method of simulating phase boundaries is presented and used to verify the theoretical claims. A Huygens' metasurface lens design is presented and simulated to further validate the theoretical predictions and show that such lenses are physically realizable.

show abstract

“…Therefore a scan enhancing setup with α of 2 would lead to halving the original beam directivity, which is in agreement with past work [5], [6], [7].…”

Section: B Effect Of Scan Enhancement On Directivitysupporting

confidence: 91%

Section: Scan Enhancement Of Finitely Sized Arraysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Theory and Simulation of Metasurface Lenses for Extending the Angular Scan Range of Phased Arrays

Egorov

Eleftheriades

2020

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…Scan enhancing devices designed via transformation optics techniques were analyzed in [6], [7]. Power conservation arguments were used in [8], [9] to obtain enhancement via shaping of gain pattern envelope of a source array. These publications share some similarities.…”

Section: Introductionmentioning

confidence: 99%

Near-Field Angular Scan Enhancement of Antenna Arrays Using Metasurfaces

Egorov¹,

Eleftheriades²

2020

Preprint

View full text Add to dashboard Cite

In this publication we continue our previous work on extending the angular scan range of phased arrays using metasurfaces. We consider in detail scan enhancement using a single metasurface lens in the near-field of a source and provide analytical expressions for source excitation to obtain a desired beam. We show that such a device suffers from the same directivity degradation as in the case of far-field lens placement. Moreover, we discuss in detail that this approach has limitations, and one cannot place the lens arbitrarily close to the source array. We then propose a two-lens near-field scan enhancer which is not subject to the same limitations, although still subject to the same directivity degradation. Finally we propose a binary metasurface concept which theoretically achieves desired scan enhancement without directivity degradation. Some theoretical claims are then verified via full-field simulations.

show abstract

Angular Scan Enhancement of Antenna Arrays Using Two Lenses

Egorov

Eleftheriades

2020

2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting

View full text Add to dashboard Cite

Wide Angular Coverage Deflector: 60-GHz three-dimensional passive electromagnetic deflector achieves wide angular coverage

Cited by 6 publications

References 17 publications

Theory and Simulation of Metasurface Lenses for Extending the Angular Scan Range of Phased Arrays

Theory and Simulation of Metasurface Lenses for Extending the Angular Scan Range of Phased Arrays

Near-Field Angular Scan Enhancement of Antenna Arrays Using Metasurfaces

Angular Scan Enhancement of Antenna Arrays Using Two Lenses

Contact Info

Product

Resources

About