Super-wideband Fractal Antenna for Future Generations of Wireless Communication

Fouad, Mohamed T.; Farahat, Asmaa E.; Hussein, Khalid Fawzy Ahmed; Shaalan, Abdel Hamied Abdel Meneam; Ahmed, M. F.

doi:10.2528/pierc23042507

Cited by 10 publications

(3 citation statements)

References 12 publications

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“…The frequency response of the maximum gain obtained by the proposed Vivaldi antenna is presented in Figure 19. The antenna gain is measured following the method described in [20] and [21]. The experimental measurements show good agreement with the simulation results.…”

Section: Frequency Response Of the Antenna Gainmentioning

confidence: 79%

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Compact Multiband High-gain Millimeter-wave Planar Antenna

Farahat,

Hussein

2023

PIER B

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A novel miniaturized high-gain Vivaldi antenna printed on a thin substrate is proposed for operation as a multi-band antenna for millimeter-wave applications. The present work proposes a novel geometrical design of the Vivaldi antenna that is printed on the opposite faces of a thin dielectric substrate. The antenna has compact size, and its dimensions are optimized to enhance the performance regarding the bandwidth of impedance matching, gain, and radiation efficiency. To maximize the gain within a desired frequency band, each arm of the Vivaldi antenna is loaded by a ring-shaped parasitic element. The results of the parametric study for antenna design optimization regarding the enhancement of the impedance matching bandwidth and the antennas gain are presented and discussed. Also, it is shown through parametric study that the size and location of the parasitic rings can be optimized to enhance the antenna gain over the desired frequency range. The multiband operation of the proposed Vivaldi antenna is explained in view of the multimode operation that is illustrated by the distributions of the surface current on the antenna arms and the electric field in tapered slot. A novel microstrip line/parallel-strip line balun structure is proposed for feeding the balanced Vivaldi antenna and to achieve wideband impedance matching. The proposed Vivaldi antenna is fabricated and subjected to performance evaluation through measurements. It is shown that the antenna impedance is matched to 50 Ω over the four frequency bands: 22.

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Section: Frequency Response Of the Antenna Gainmentioning

confidence: 79%

“…The variation of the radiation efficiency of the proposed Vivaldi antenna with varying the frequency is presented in Figure 21. The radiation efficiency is measured following the method in [20] and [21]. The experimental measurements show good agreement with simulation results.…”

Section: Frequency Response Of the Antenna Efficiencymentioning

confidence: 94%

Compact Multiband High-gain Millimeter-wave Planar Antenna

Farahat,

Hussein

2023

PIER B

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“…A clown-shaped antenna using CPW feeding method has been reported in 11 with a fractional bandwidth (FBW) of about 190%. In the article, 12 a two-arm fractal structure radiating element-based antenna has been designed covering the operating spectrum from 3 to 30 GHz. Elliptical ring patch antenna with SWB response (2.31-40 GHz) has been presented in article.…”

mentioning

confidence: 99%

Improvement in notch band characteristics of a hexagonal super wideband antenna by interfering back radiation out of phase with front radiation using frequency selective surface

Mukherjee,

Roy,

Tewary

et al. 2024

Int J Communication

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SummaryA band‐notched super wideband (SWB) planar monopole antenna with improved notch characteristics is proposed in this article. A hexagonal SWB antenna operating in the frequency range from 3.04 to 36 GHz is initially designed on Arlon substrate. The hexagonal patch is then loaded with optimum sized U‐shaped slot to eliminate WLAN band (5.15–5.85 GHz). The notch band's characteristics are further improved by incorporating a frequency selective surface (FSS) of a square array at a specific distance below the antenna to introduce a phase delay of 180° between the back radiation reflected by the FSS with the front radiation at the notched frequency. Improvement of notch band gain, efficiency, and antenna front‐to‐back ratio (FBR) are studied. The antenna without embedding an FSS exhibits working spectrum from 3.1 to 33.6 GHz with notch frequency gain of −2.6 dBi and efficiency 53%. The inclusion of an FSS layer at 25.2 mm behind the antenna results in notch frequency gain of −7.6 dBi with an efficiency of 23%. FBR improvement of about 16 dB is achieved at 8 GHz, and FBR is reduced by about 5 dB at the notch frequency. 169% fractional bandwidth with bandwidth dimension ratio (BDR) of 1622 is achieved in this proposed FSS integrated antenna. The inclusion of FSS to improve the band elimination performance represents the novelty of this proposal. The data are validated by electromagnetic simulation and physical measurement techniques.

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Dual-Band (28/38 GHz) Compact MIMO Antenna System for Millimeter-Wave Applications

Elsharkawy,

Hussein,

Farahat

2023

J Infrared Milli Terahz Waves

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The present work proposes a novel design of a dual-band-printed antenna for operation at the millimeter-wave frequencies 28 and 38 GHz that are utilized for the modern and future generations of mobile communications. The antenna is composed of two radiating elements. The first element is the main patch that is fed through a microstrip line with inset feed, and the second element is a parasitic element that is fed through capacitive coupling with the main patch. The design parameters of the proposed antenna are optimized through a complete parametric study to give excellent impedance matching at 28 GHz over the band 27.7–28.3 GHz and at 38 GHz over the band 37.7–38.3 GHz. The surface current distributions at the two operational frequencies are investigated. The designed antenna is used to construct a four-port efficient multi–input–multi–output (MIMO) system. The MIMO system performance is investigated regarding the envelope correlation coefficient (ECC), diversity gain (DG), and the channel capacity loss (CCL) showing very good performance. The single-element antenna and the MIMO are fabricated and experimentally evaluated showing excellent impedance matching over the lower and higher frequency bands, which come in agreement with the simulation results. It is shown that the antenna produces maximum gain of 7.4 and 8.1 dBi at 28 and 38 GHz, respectively. The average radiation efficiencies of the proposed antenna are 88% and 88.8% over the lower and higher frequency bands, respectively. In addition, the coupling coefficients between the MIMO antenna systems are measured experimentally showing very low coupling values resulting in an efficient MIMO system that is suitable for future millimeter-wave (mm-wave) applications.

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Super-wideband Fractal Antenna for Future Generations of Wireless Communication

Cited by 10 publications

References 12 publications

Compact Multiband High-gain Millimeter-wave Planar Antenna

Compact Multiband High-gain Millimeter-wave Planar Antenna

Improvement in notch band characteristics of a hexagonal super wideband antenna by interfering back radiation out of phase with front radiation using frequency selective surface

Dual-Band (28/38 GHz) Compact MIMO Antenna System for Millimeter-Wave Applications

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