Metasurfaces with positive reflection phase gradients for broadband directive emission

Yahiaoui, Riad; Beeharry, Thtreswar; Burokur, Shah Nawaz; Grassin, Patricia; Ouslimani, Habiba Hafdallah

doi:10.23919/eucap.2017.7928430

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…In addition to a simpler design, we have achieved bandwidth and gain enhancement by using a single layer of FSS superstrate, thus retaining a minimal complexity of the structure. While many of the earlier reports are on reflecting type FSS for gain and directivity enhancement, [22][23][24][25][26][27][28][29][30] there are some which are on transmission-type FSS for directivity increment as well. 5 Ours has a transmission-type FSS for gain and bandwidth enhancement.…”

Section: Comparisonmentioning

confidence: 99%

Metasurface‐based triple‐band high‐gain Fabry–Perot cavity antenna

Joshi

Vijaya

2021

Int J RF Mic Comp-Aid Eng

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A compact, high gain, single layer substrate-superstrate configuration based Fabry-Perot cavity (FPC) microstrip patch antenna (MPA) is designed. It consists of a single-frequency MPA on a substrate, along with a frequencyselective surface (FSS) which acts as a metasurface-superstrate. The FSS contains a periodic arrangement of unit cells in a square lattice, where each unit cell is structured by a simple design of H-shape. It works as a partially reflecting surface and is used as a superstrate by mounting the FSS layer over the conventional patch antenna using a Teflon spacer. Our design of single layer and single resonance FSS structure is used to obtain triple-band resonance on loading it as a superstrate on the MPA. The enhanced reflection phase of FSS plays a key role in obtaining triple-band performance. The relationship between the cavity height and the cavity resonance frequency is the foremost reason to achieve triple-band FPC-MPA from a single resonance MPA. The prototype antenna is fabricated, and the measured results show that the FPC antenna yields a peak gain of nearly 9.30, 10.00, and 9.60 dB at 8. 90, 9.63, and 11.49 GHz, respectively in broad-side direction in both the planes.Gain enhancement of nearly 6, 4.50, and 5.50 dB, in all the three bands are achieved in both the planes, emphasizing the effect of stacking the superstrate on the conventional patch antenna. The triple-band frequency response shows 3 dB gain bandwidths of 11.79%, 11.45%, and 9.56% at the three frequencies. A significant improvement in impedance bandwidth has been achieved in the measurements in all the three frequency bands, with the highest bandwidth improvement of 6.71% of the FPC antenna at 11.49 GHz. It is also reconfigurable as its operating frequency can be tuned within the X-band (8-12 GHz) range by a small change in the spacer thickness. In addition, it shows rotation angle-independent performance features.

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Section: Comparisonmentioning

confidence: 99%

Metasurface‐based triple‐band high‐gain Fabry–Perot cavity antenna

Joshi

Vijaya

2021

Int J RF Mic Comp-Aid Eng

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“…e restricted bandwidth of resonant cavities limits them to be operational with reduced bandwidth [1,2]. Several works have been reported to improve the bandwidth and maintain high gain at upper frequency wireless spectrum [3][4][5][6][7][8]. Single-and dual-layer high-gain FPC antennas are studied in the literature [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Multilayer PRS broadband and high-gain antennas are analysed by Konstantinidis et al and Mohammed Aymen et al [13][14][15]. High-gain single-layer and multilayer antennas with di erent feed radiators and polarizations are analysed [8,[16][17][18][19][20][21][22][23][24][25][26][27][28][29]. e FPC antennas nd wide applications in modern wireless communication, in radars (RCS reduction), and in networking sectors [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Development of Multilayer Partially Reflective Surfaces for Highly Directive Cavity Antennas: A Study

Abdulkareem

Gopalakrishnan

2020

Wireless Communications and Mobile Computing

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This paper proposes a novel triple-layer partially reflecting surface (PRS) for designing a highly directive antenna. The proposed PRS design has 54% improvement in impedance bandwidth with existing design. The design has multiple cavities, optimized for improved gain and bandwidth performance. The PRS arrays are printed on the dielectric substrate, placed above the ground plane at a height of approximately half wavelength. The reference square microstrip patch antenna operating at a frequency of 5.8 GHz with a gain of 3.77 dBi is enhanced to 13.54 dBi. The measured S11 of the fabricated prototype is −22.12 dB with a VSWR of 1.17 : 1. Measured 3 dB gain bandwidth of the antenna is 390 MHz which is an improvement of 50% compared with the reference antenna. This highly directive antenna is suitable for WiMAX wireless application.

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