A Millimeter-Wave Antenna System for Wideband 2-D Beam Steering

Baba, Affan A.; Hashmi, Raheel M.; Esselle, Karu P.; Attygalle, M.; Borg, Daniel

doi:10.1109/tap.2020.2969844

Cited by 49 publications

(17 citation statements)

References 40 publications

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“…Such devices imply high cost and bulky structures and, even if the design of corporate and series-fed networks are well established, they typically require the use of large, often lossy and expensive implementations (see, e.g., [3]). Alternatives techniques have also been proposed in the last decade, such as tunable inductive partially reflective surfaces (PRSs) [4], phase modulated metasurfaces [5], phase transformers [6], [7], slotted structures [8], lenses [9], [10], composite feeding networks [11], and active frequency selective surfaces [12].…”

Section: Introductionmentioning

confidence: 99%

Wideband Array-Fed Fabry-Perot Cavity Antenna for 2-D Beam Steering

Comite

Podilchak

Kuznetcov

et al. 2021

IEEE Trans. Antennas Propagat.

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We propose the design and test of a 2-D Fabry-Perot structure based on a multilayer slab arrangement fed by a circular array of simple sources. Such a class of planar leakywave antenna can be made by low-loss commercial laminates and it is bounded on top by a sub-wavelength partially-reflecting surface. The antenna is designed to suppress undesired radiation from the quasi-TEM mode while leaking power by the excitation of a fast TM1 leaky mode, which is a perturbed version of the guided-wave supported by the corresponding parallel-plate waveguide. An accurate dispersive analysis for the multilayer structure is developed and an original feeding system is designed and optimized to provide the needed wideband impedance matching. Thanks to translational invariance enabled by the homogenized nature of the partially reflecting screen, the antenna is used as a radiating element in the design of a leaky-waveenhanced phased array, constituted by an arrangement of vertical probes to generate directive pencil beams steerable at a single frequency in azimuth and by changing frequency in elevation.

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Section: Introductionmentioning

confidence: 99%

Wideband Array-Fed Fabry-Perot Cavity Antenna for 2-D Beam Steering

Comite

Podilchak

Kuznetcov

et al. 2021

IEEE Trans. Antennas Propagat.

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“…The proposed design thus greatly reduces the cost and pave the way for the development of low-cost antennas. The maximum height of the proposed design is only 8.4λ 0 , which is 40% less than the maximum height of the most closely related and recently reported millimeter-wave beam scanning antenna [19]. Furthermore, the fabrication cost of the parts used in the proposed design is extremely low than that of the two stepped dielectrics developed using traditional subtractive manufacturing technique.…”

Section: Introductionmentioning

confidence: 79%

Beam-Scanning Antenna Based on Near-Electric Field Phase Transformation and Refraction of Electromagnetic Wave Through Dielectric Structures

et al. 2020

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An elegant combination of electric near-field phase transformation technique and electromagnetic-wave refraction, implemented through a pair of 3D printed dielectric structures, has been used to demonstrate a Ka-band beam-scanning antenna system. The system comprises a resonant-cavity antenna (RCA), which is used as a base antenna, a stepped dielectric (SD), and a dielectric wedge (DW). The SD is suspended above RCA in the near-field region to focus its broadside beam at an offset angle of 20 •. The DW is placed above the SD and its two opening angles are selected such that the offset-angle focused beam tilts further and moves back to the broadside when the DW is co-and counter-aligned with the SD, respectively. The total height of the antenna system is 8.1λ 0 , where λ 0 is the free-space wavelength at the operating frequency of 30 GHz. The total cost of the material used for printing the two dielectric structures in prototyping is only 6 USD. It has been demonstrated through measurements of the prototype that by rotating the DW around its own axis, the antenna beam can be scanned in both azimuth and elevation planes. The measured results indicate that antenna beam can effectively be scanned to any arbitrary angular position within a conical region having an apex angle of 68 • , while maintaining peak-gain value within the 3 dB limit of the maximum gain of 16 dBi. INDEX TERMS beam-scanning, beam-steering, low-cost antennas, phase-shifting structures, rapid prototyping, resonant-cavity antenna, 3D printing

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“…Secondly, drawing on the so-called Risley prism concept, a two-dimensional beam scanning can be attained by rotating two PSS over a primary feed [8]. This idea was later extended [9], [10] to be able to transform the near field of a fixed-beam antenna, thus reducing the total structure height.…”

Section: Introductionmentioning

confidence: 99%

True-Time-Delay Mechanical Phase Shifter in Gap Waveguide Technology for Slotted Waveguide Arrays in Ka-Band

Sánchez‐Escuderos

Herranz-Herruzo

Ferrando-Rocher

et al. 2021

IEEE Trans. Antennas Propagat.

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This paper proposes a novel all-metal mechanical phase shifter in gap waveguide technology. The phase shifter is aimed at providing beam-scanning capabilities to conventional slot array antennas along the elevation plane. To validate experimentally the beam-steering functionality, a 4×8 slot-array antenna has been designed and fabricated, along with the phaseshifting mechanism. The whole antenna consists of two pieces: a lower rotatable block, which changes the length of concentric Groove Gap Waveguides, and an upper fixed block, where the slot-array antenna is placed. Experimental results validate the proposed concept, having obtained steering angles of up to 25 • , with gain levels around 20 dBi with an antenna efficiency close to 90%. A reflection coefficient below −10 dB is achieved for a wide range of rotation angles from 29.5 GHz to 30.5 GHz. The proposed phase shifter is completely scalable to any array size and its true-time-delay nature enables wide steering ranges for closely-spaced slot arrays with wideband radiation performance.

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A Millimeter-Wave Antenna System for Wideband 2-D Beam Steering

Cited by 49 publications

References 40 publications

Wideband Array-Fed Fabry-Perot Cavity Antenna for 2-D Beam Steering

Wideband Array-Fed Fabry-Perot Cavity Antenna for 2-D Beam Steering

Beam-Scanning Antenna Based on Near-Electric Field Phase Transformation and Refraction of Electromagnetic Wave Through Dielectric Structures

True-Time-Delay Mechanical Phase Shifter in Gap Waveguide Technology for Slotted Waveguide Arrays in Ka-Band

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