Wideband Antenna in Cavity Based on Metasurfaces

Martinis, Mario; Bernard, L.; Mahdjoubi, Kouroch; Sauleau, Ronan; Collardey, Sylvain

doi:10.1109/lawp.2015.2491609

Cited by 26 publications

(8 citation statements)

References 9 publications

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“…The antenna design also lacks the beam scanning ability. [26] proposed a wideband cavity antenna with a large ground plane where the gain varies from 0 to 6.8 dB within a 28% fractional bandwidth at 2.3 GHz. The antenna has wide beamwidth making it poorly directional.…”

Section: Introductionmentioning

confidence: 99%

Wide-Band Directional Cavity Antenna With Low Scanning Loss for Wlan

Swapna¹,

Karthikeya²,

Koul³

et al. 2022

PIER C

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In this paper, a wide-band cavity antenna with low scanning loss for 20% antenna bandwidth as well as having a wide 20% 1-dB gain bandwidth over the antenna beam scanning angle is proposed. The antenna operates in the 5 GHz band of IEEE 802.11 ac wireless local area network (WLAN) applications. A beam scanning of 20 • is demonstrated by varying the height of a slider within the antenna cavity. The broadside peak gain of 9.6 dBi is maintained for 20% of the antenna bandwidth with a gain reduction of only 0.3 dB throughout its operating frequency range. Besides, the scanning loss suffered by the antenna when scanning from the broadside to the maximum scanned angle is only 0.8 dB. The proposed scan performance is verified for a single element antenna and a two-element antenna array.

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Section: Introductionmentioning

confidence: 99%

Wide-Band Directional Cavity Antenna With Low Scanning Loss for Wlan

Swapna¹,

Karthikeya²,

Koul³

et al. 2022

PIER C

View full text Add to dashboard Cite

show abstract

“…5,6 It is reported MTS antenna can achieve a wide bandwidth over 16-32% with the related antenna profile ranging from 0.06λ 0 to 0.16λ 0 . [7][8][9][10][11][12] There are several excitation methods developed for MTS antennas, including slot-coupled, [13][14][15][16][17] CPW-fed, 18 L-probe-fed, 19 dipole-fed, 20 and patch-fed 21,22 approaches. Despite wide bandwidth obtained under a low profile, the conventional slot-coupled MTS antenna encounters large backward radiation due to the long radiating slot on the ground.…”

Section: Introductionmentioning

confidence: 99%

“…MTS antenna usually utilizes a configuration of uniform or non‐uniform high impedance surface structure 5,6 . It is reported MTS antenna can achieve a wide bandwidth over 16–32% with the related antenna profile ranging from 0.06 λ 0 to 0.16 λ 0 7–12 . There are several excitation methods developed for MTS antennas, including slot‐coupled, 13–17 CPW‐fed, 18 L‐probe‐fed, 19 dipole‐fed, 20 and patch‐fed 21,22 approaches.…”

Section: Introductionmentioning

confidence: 99%

Low‐profile compact metasurface‐loaded patch antenna with enhanced bandwidth

Wan

Xue

Cao

et al. 2021

Micro & Optical Tech Letters

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In this article, a low‐profile wideband metasurface‐loaded patch antenna is proposed. The antenna utilizes a compact structure of square ring type metasurface loaded patch to increase the bandwidth of traditional microstrip patch antenna. By introducing a patch‐induced metasurface mode at higher frequency combined with the fundamental patch mode at lower frequency in the band of interest, a dual‐mode operation is revealed with the aid of characteristic mode analysis. Compared with conventional metasurface antenna fed by a long radiating slot, the proposed antenna can achieve a 30% reduction in aperture size with a simpler configuration, clear dual‐mode operation and significant improvement of backward radiation. To validate the concept, a 1 × 4 array prototype of proposed antenna is manufactured under a low profile of 0.04λ0 (λ0 is the free space wavelength at 27.5 GHz). The measured results indicate the antenna array achieves a wide impedance bandwidth of 22.8% with a peak realized gain of 13.1 dBi and a high front‐to‐back ratio over 20 dB.

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“…Furthermore, it was demonstrated in [7] that, for small cavities of rectangular shape (edge size of 0.25 λ 0 , where λ 0 is the wavelength in vacuum at the operating frequency), a patch antenna placed at the aperture of the cavity does not offer the best performance in terms of BW: The maximum reachable BW was shown to be achieved by replacing a standard patch at the aperture with a metasurface composed of one or several layers of capacitively coupled strips [8], whose dimensions are typically smaller than one tenth of the wavelength [10]. As introduced in previous works [7][8][9]11], loading the aperture of a metallic cavity antenna with a capacitance-only impedance offers two benefits: Increasing the antenna BW [7], particularly compared to stacked patch antennas embedded in a larger cavity [11]; or reduction of the antenna and cavity size for a given BW [9].…”

Section: Introductionmentioning

confidence: 99%

Metasurface Antennas Embedded in Small Circular Cavities for Telemetry Applications

et al. 2019

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This paper introduces a metasurface-inspired antenna embedded in a circular metallic cavity with a very small diameter (from 0.25 λ0 down to 0.12 λ0, where λ0 is the wavelength in vacuum at the operating frequency). The proposed concept is introduced and explained: It consists of placing a capacitive surface at the cavity aperture. This capacitive effect is obtained using multi-layer capacitively coupled strips. Our numerical results demonstrate that the impedance bandwidth is larger than that of standard patch antennas embedded in the same cavity size. Various prototypes have been manufactured, and measurements are found to be in good agreement with numerical results in all cases. The practical applications of these small metasurface antennas are demonstrated with telemetry applications for flying vehicles.

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Wideband Antenna in Cavity Based on Metasurfaces

Cited by 26 publications

References 9 publications

Wide-Band Directional Cavity Antenna With Low Scanning Loss for Wlan

Wide-Band Directional Cavity Antenna With Low Scanning Loss for Wlan

Low‐profile compact metasurface‐loaded patch antenna with enhanced bandwidth

Metasurface Antennas Embedded in Small Circular Cavities for Telemetry Applications

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