Substrate Integrated Waveguide Leaky-Wave Antenna With Wide Bandwidth via Prism Coupling

Wang, Lei; Gómez‐Tornero, José Luis; Quevedo–Teruel, Oscar

doi:10.1109/tmtt.2018.2818149

Cited by 81 publications

(40 citation statements)

References 29 publications

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“…The major limitation of this design is complex. However, more recently, the authors in [27] proposed the use of a lens that compensated the dispersion of leaky wave, making a whole broadband antenna. This design reduced the losses and cost at high frequency.…”

Section: Introductionmentioning

confidence: 99%

Enhancement Bandwidth of Half Width-Microstrip Leaky Wave Antenna Using Circular Slots

Mohsen¹,

Isa²,

Isa³

et al. 2019

PIER C

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This paper presents a new technique to enhance impedance bandwidth of single layer half width microstrip leaky wave antenna (HW-MLWA) with continuous main beam scanning. The enhancement is realized by etching four circular slots on the radiation element. Two of the circular slots are placed close to the feed port, and the others are close to the matching load. The wide main beam scanning is between +12 • and +70 • when operation frequency sweeps between 4.3 GHz and 6.5 GHz. A comparison between the Uniform HW-MLWA (reference) and the proposed HW-MLWA with circular slots is provided to study the effectiveness of the added circular slots. The proposed HW-MLWA is fabricated and tested. The measured impedance bandwidth is 49.9% (4.28 GHz to 7.13 GHz) with peak gain 10.31 dBi at 5 GHz, hence the proposed antenna can be considered as a suitable candidate for C-band applications.

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Section: Introductionmentioning

confidence: 99%

Enhancement Bandwidth of Half Width-Microstrip Leaky Wave Antenna Using Circular Slots

Mohsen¹,

Isa²,

Isa³

et al. 2019

PIER C

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“…Note that the frequencies further from the design frequency suffer more from an SLL increase, as expected. In any case, considering the useful bandwidth, the beam squints just 4 • over a 8% of fractional bandwidth, which is a very small value (for instance, in [20], θ = 12 • over a 10% fractional bandwidth was obtained and, in [21], θ = 1 • from 35 to 40 GHz, which is a 13.3% fractional bandwidth, but a prism structure was required), thus validating the practicality of the scanning rate control.…”

Section: Application: Reduction Of the Beam Squintingmentioning

confidence: 74%

“…The control of the scanning sensitivity with respect to the tunable parameter is highly necessary in order to achieve the desired beam scanning range, especially, when considering the limitations/restrictions that the mentioned tuning technologies impose (such as the low substrate thickness when using LCs or the maximum achievable displacement when employing piezo-actuators). Other works on LWAs pay attention to the problem of the scanning rate control, either for increasing the rate in scanning-beam applications with reduced bandwidth [18], [19] or for reducing the beam-squinting in fixed-beam applications [20], [21]. However, these latter works deal with the intrinsic scanning mechanism with frequency variation.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurability Mechanisms With Scanning Rate Control for Omega-Bianisotropic Huygens’ Metasurface Leaky-Wave Antennas

2019

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In this paper, different reconfigurability mechanisms are proposed to scan the pointing direction at a fixed frequency of recently-proposed leaky-wave antennas based on omega-bianisotropic Huygens' metasurfaces. The tunability of both the waveguide height and the dielectric permittivity of the substrate filling the waveguide are studied, extracting theoretical expressions to predict the dependence of the beam pointing direction with the design parameters. It is shown that it is possible to control the scanning rate, a challenging task for conventional leaky-wave antennas, leading to different performances: high scanning, radiation pattern stability and backward-to-forward scanning. Additionally, the control of the scanning rate is exploited to reduce the beam squinting when varying the frequency. Simulation results of several designs with both impedance sheets and physical realization to implement the metasurfaces demonstrate the validity of the theoretical predictions and the reconfigurability potential of such a structure.

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“…20,21 Most recently, metamaterials with glide symmetry have been developed to achieve flexible control of dispersion behaviors and band gaps, so as to provide new solutions for microwave waveguides, functional devices, and antennas. [22][23][24] Here, we introduce glide symmetry in dual-conductor SSPP TLs and TL arrays for characteristics control. First, the dispersion curves, modal fields, and transmission properties of the glide symmetric TL are studied, and degeneracy of the fundamental mode is investigated.…”

Section: Introductionmentioning

confidence: 99%

Glide symmetry for mode control and significant suppression of coupling in dual-strip SSPP transmission lines

et al. 2021

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Glide symmetry, which is one kind of higher symmetry, is introduced in a special type of plasmonic metamaterial, the transmission lines (TLs) of spoof surface plasmon polaritons (SSPPs), in order to control the dispersion characteristics and modal fields of the SSPPs. We show that the glide-symmetric TL presents merged pass bands and mode degeneracy, which lead to broad working bandwidth and extremely low coupling between neighboring TLs. Dual-conductor SSPP TLs with and without glide symmetry are arranged in parallel as two channels with very deep subwavelength separation (e.g., λ 0 ∕100 at 5 GHz) for the application of integrated circuits and systems. Mutual coupling between the hybrid channels is analyzed using coupled mode theory and characterized in terms of scattering parameters and near-field distributions. We demonstrate theoretically and experimentally that the hybrid TL array obtains significantly more suppressed crosstalk than the uniform array of two nonglide symmetric TLs. Hence, it is concluded that the glide symmetry can be adopted to flexibly design the propagation of SSPPs and benefit the development of highly compact plasmonic circuits.

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Substrate Integrated Waveguide Leaky-Wave Antenna With Wide Bandwidth via Prism Coupling

Cited by 81 publications

References 29 publications

Enhancement Bandwidth of Half Width-Microstrip Leaky Wave Antenna Using Circular Slots

Enhancement Bandwidth of Half Width-Microstrip Leaky Wave Antenna Using Circular Slots

Reconfigurability Mechanisms With Scanning Rate Control for Omega-Bianisotropic Huygens’ Metasurface Leaky-Wave Antennas

Glide symmetry for mode control and significant suppression of coupling in dual-strip SSPP transmission lines

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