A Metasurface Radar Monopulse Antenna

Faenzi, Marco; González‐Ovejero, David; Petraglia, Giovanni; D'Alterio, Giuliana; Pascariello, Fabio; Vitiello, Roberto; Maci, S.

doi:10.1109/tap.2021.3137206

Cited by 10 publications

(11 citation statements)

References 47 publications

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“…Monopulse radars are a perfect choice for tracking and detecting targets due to their capability of gathering the target distance and angle information with high speed and accuracy using a single pulse [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12].…”

Section: Introductionmentioning

confidence: 99%

“…Many techniques to realize Monopulse array antennas have been reported in recent years [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12]. However, employing waveguide horn antennas is a common way of realizing Monopulse antennas, but it suffers from large size and difficulty in instruction.…”

Section: Introductionmentioning

confidence: 99%

“…However, employing waveguide horn antennas is a common way of realizing Monopulse antennas, but it suffers from large size and difficulty in instruction. The challenge of solving this problem led to applying planar structure antennas such as Microstrip and substrate integrated waveguide (SIW) antennas in designing Monopulse radar [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12]. Circularly polarized (CP) antennas have unique features such as the ability to reduce polarization mismatch resulting from the multipath interference of wave propagation and also the ability to cross the ionosphere has been considered by many researchers in various applications [4], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22].…”

Section: Introductionmentioning

confidence: 99%

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Polarization Diversity Controllable Monopulse Antenna Array Design

Karamzadeh

2023

IEEE Access

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The design of a compact and wideband circularly polarized (CP) Monopulse antenna is presented. Firstly, the small-sized antenna element (13mm × 13mm), with the impedance bandwidth (BW) of 80.5% (4.3-10.1 GHz) and axial ratio (AR) bandwidth of 48.1% (6-9.8 GHz), and the gain of 7.2 dBic is designed. The array structure consists of two rat-race couplers; two metalized via holes that generate sum and difference patterns, and four branch-line couplers for CP characteristic improvement. The proposed antenna is capable of controlling CP diversity in both sum and difference beams. Additionally, with 50% BW and 25% 3-dB AR results and also with null-depth of less than −48 dB, it is a convenient design for tracking purposes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polarization Diversity Controllable Monopulse Antenna Array Design

Karamzadeh

2023

IEEE Access

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“…On this foundation, many papers have been published about holographic antennas having multiple feeds [4], [26]- [28]. In [29] a holographic multi-feed antenna is designed for an exemplary integration into a monopulse radar.…”

Section: Introductionmentioning

confidence: 99%

“…In recently published works, the hologram superposition into a shared holographic aperture is implemented by a pixel-based arithmetic averaging of all individual impedance sub-holograms [4], [26]- [29]. In this design methodology, the incident angular-dependency of the SW w.r.t.…”

Section: Introductionmentioning

confidence: 99%

Angle-Dependent Synthesis Method for Holographic Multi-Feed Antennas

Frey

Döring

Riese

et al. 2023

IEEE Open J. Antennas Propag.

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A novel synthesis method for holographic multi-feed antennas is presented to combine all sub-holograms into an angle-dependent shared holographic aperture. In order to find the global error minimum between the shared holographic aperture and all ideal sub-holograms, a non-pixel-based genetic optimization is used. For a more accurately implementation of the analytical impedance tensor an eigenvector approach taking all tensor components into account is introduced. The optimized holographic antenna has four feeds for an exemplary integration into a 2D-monopulse radar system and is realized on a fused silica wafer due to its lower loss at millimeter-wave frequencies compared to Teflon-based materials. The antenna prototype provides a measured gain of 23 dBi, a polarization purity of 26 dB and a side-lobe level of 20 dB for feed 1, 2 and 4 is reached across 76 GHz−81 GHz. The S-parameters are measured from 60 GHz to 90 GHz, and a reflection coefficient of −14 dB and an inter-port coupling <−38 dB are achieved. The measured 2D-monopulse patterns provide a FOV of 10°, the sum beam has a gain of 26 dBi leading to an aperture efficiency of 45 % and the differential beams show a null depth of 30 dB.INDEX TERMS holographic antenna, metasurface antenna, multi-feed antenna, multi-beam antenna, surface wave, leaky wave, monopulse radar, glass technology.

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Wideband directional-fed holographic metasurface with integrated monopole and parabolic reflector for far-/near-field beams manipulations

Xue,

Shen,

et al. 2024

J. Phys. D: Appl. Phys.

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Holographic metasurface has been widely investigated, but suffers from the trade-off between bandwidth, gain, and integration. In this article, a wideband high-gain holographic metasurface with integrated monopole is proposed. It employs the geometrical characteristics of parabolic reflector to realize directional-fed metasurface, and the footprint is reduced to only one-third of the conventional center-fed designs. By varying modulation index and paraboloid height, the bandwidth and gain are improved simultaneously. To validate the proposed idea, two prototypes are analyzed and fabricated to demonstrate flexible beam manipulation in respective far-field radiation and near-field propagation. In both cases, the measured results are well-matched with the simulation. The proposed holographic metasurface for far-field appliactions features wide bandwidth, high gain, and planar integration simultaneously. Moreover, to the best of the authors’ knowledge, this is the first Bessel beam generator using directional-fed holographic metasurface with parabolic reflector.

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A Metasurface Radar Monopulse Antenna

Cited by 10 publications

References 47 publications

Polarization Diversity Controllable Monopulse Antenna Array Design

Polarization Diversity Controllable Monopulse Antenna Array Design

Angle-Dependent Synthesis Method for Holographic Multi-Feed Antennas

Wideband directional-fed holographic metasurface with integrated monopole and parabolic reflector for far-/near-field beams manipulations

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